JP4145128B2 - Airbag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a vehicle such as a passenger car, a commercial vehicle, and a bus. The front of the seat (in the case of a front seat, in the center of the steering handle, in the instrument panel, etc., in the case of a rear seat, the seat of the front seat) The present invention relates to the configuration of an airbag in an airbag device disposed at a back position or the like.
[0002]
[Prior art]
  In general, an airbag as described above is obtained by cutting a base fabric having a predetermined shape from a cloth body and joining the base fabric into a bag shape (sewing by sewing, joining by adhesive, high frequency, ultrasonic wave, heat welding, etc.). It is configured. The airbag is not simply inflated in a round shape. For example, as disclosed in Patent Document 1, the receiving surface for receiving the occupant in the airbag is not a spherical shape inflated toward the occupant, but a flat surface. There is a need to inflate airbags.
  This is because, when the airbag is inflated, by receiving the occupant with the flat receiving surface, the load when the occupant is received is dispersed without being concentrated on a part of the occupant.
[0003]
[Patent Document 1]
  JP 2001-260788 A (FIGS. 3, 4, and 6)
[0004]
[Problems to be solved by the invention]
  According to the structure of Patent Document 1, the receiving surface (26 (18) in FIG. 6 of Patent Document 1) for receiving the occupant in the airbag has a flat shape, but the receiving surface has a triangular shape as viewed from the occupant. (See FIG. 6 of Patent Document 1), there is room for improvement in terms of increasing the area of the receiving surface.
  Further, according to the structure of Patent Literature 1, when the airbag is inflated, the joined portions (13 and 14 in FIGS. 4 and 6 of Patent Literature 1) where the base fabric and the base fabric are joined are inflated. Located in the center of the top of the bag. In this case, when the gas of the inflator (located at 23 in FIGS. 4 and 6 of Patent Document 1) flows into the airbag and the airbag is inflated, the gas of the inflator hits the center of the upper portion of the airbag and lifts it up. It becomes a state like this. Thereby, when the situation where the gas of an inflator leaks in the junction part of the center of the upper part of an airbag generate | occur | produces, the possibility of developing into the situation where the expansion | swelling of an airbag is delayed is considered.
[0005]
  When making the receiving surface flat in an air bag, it is necessary to inflate the air bag in a direction slightly different from the direction of the inflator, such as an air bag for a passenger seat, or from the inflator to the passenger The distance may be relatively long.
  Further, in order to inflate the airbag so that the receiving surface is flat, it has been proposed to arrange an auxiliary fabric that regulates the shape of the airbag when inflated inside the airbag. The base fabric is joined in the form of a bag with the auxiliary fabric disposed in the bag. In this case, adding an auxiliary fabric to the base fabric may increase the overall joining length when the airbag is configured in a bag shape, and there is room for improvement in terms of reducing production costs.
[0006]
  The present invention increases the area of a receiving surface for receiving an occupant in an air bag, and suppresses the possibility that the inflator gas leaks from the joined portion of the air bag and that the expansion of the air bag is delayed. In the case where the airbag needs to be inflated in a direction slightly different from the direction of the inflator or the distance from the inflator to the occupant may be relatively long, the airbag when inflated When the auxiliary cloth which regulates the shape of this is provided, it aims at comprising so that the whole joining length may not become long.
[0007]
[Means for Solving the Problems]
[I]
  Claim 1According to the characteristics, in the deployed state (the state before joining), the airbag is the first base fabric and the second base fabric., Receiving base cloth and auxiliary base cloth(One side part of the first and second base fabrics is connected (see, for example, A1 in FIGS. 1 and 11), and one of the receiving base fabrics is provided. The side part is connected to the side part of the first and second base fabrics (see, for example, A2 and A3 in FIGS. 1 and 11).. ReceivingAn auxiliary base fabric is connected to the upper side or the lower side of the anti-stick base fabric (see, for example, A4 and B2 in FIG. 1).).
[0008]
  Claim 1According to the characteristics of the airbag in the above stateExampleFor example, as shown in FIGS. 1 and 2 (a), the rear side 1b of the first base fabric 1 and the lower side 3b of the receiving base fabric 3 are joined, and the rear side 2b of the second base fabric 2 and the receiving base are joined. Joining the upper side 3a of the cloth 3 and joining the other side parts 1c, 1d, 2c, 2d, 3c, 3d of the first, second and receiving base cloths 1, 2, 3The secondBy joining the front sides 1a, 2a of the first and second base fabrics 1, 2 and the ends 4a, 5a of the auxiliary base fabrics 4, 5AndThe airbag can be configured in a bag shape.
[0009]
[II]
  According to the description in [I] aboveClaim 1According to the above feature, when the gas in the inflator 6 flows into the airbag and the airbag is inflated, the gas in the inflator 6 lifts the second base fabric 2 as shown in FIGS. It will be in the state which flows toward the receiving base fabric 3, and will be in the 1st and 2nd base fabric 1,2.Auxiliary base fabric 4,5Is extended to the rear of the vehicle body (to the right of the paper surface in FIGS. 4A and 4B). The rear side portion 2b of the second base fabric 2 and the upper side portion 3a of the receiving base fabric 3 are lifted, and the receiving base fabric 3 is extended to the upper side of the vehicle body (above the paper surface in FIGS. 4A and 4B). .
[0010]
  ThisClaim 1According to the above feature, when the inflator gas flows into the airbag and the airbag is inflated, the first and second base fabrics are extended to the rear of the vehicle body while the second base fabric is lifted. The surface of the receiving base fabric between the rear side portions of the first and second base fabrics is a circle when viewed from the occupant due to the fact that the base fabric is provided with upper and lower side portions, and one and the other side portions. It tends to be a rectangular shape (for example, a rectangular shape) instead of a shape.
[0011]
  Claim 1According to the feature, since the auxiliary base fabric is connected to the upper side or the lower side of the receiving base fabric, the state where the central portion side of the receiving base fabric tries to expand is suppressed by the auxiliary base fabric. The lateral side portion of the receiving base fabric that is not connected is in a state of being easily expanded. As a result, the state in which the center side of the receiving base fabric expands and the receiving base fabric becomes spherical toward the passenger is suppressed, and the surface of the receiving base fabric tends to be flat.
[0012]
  In this case,Claim 14 (b), for example, when the gas of the inflator 6 flows toward the receiving base cloth 3, the auxiliary base cloth 4 is positioned between the inflator 6 and the receiving base cloth 3. If it will be in a state, the gas of the inflator 6 will be obstructed by the auxiliary base cloth 4 and will not flow easily to the center part side of the receiving base cloth 3, and will flow easily to the side part of the receiving base cloth 3. As a result, the expansion of the central side of the receiving base fabric 3 is delayed with respect to the expansion of the lateral side portion of the receiving base fabric 3, and the surface of the receiving base fabric 3 tends to be flat. A state in which the center side is rapidly expanded and the surface of the receiving base cloth 3 becomes spherical toward the passenger is suppressed.
[0013]
[III]
  Claim 1According to the above feature, as described in [II] above, when the gas of the inflator flows into the airbag and the airbag is inflated, the first and second base fabrics are lifted while the second base fabric is lifted. Since the direction in which the airbag is inflated is substantially determined by the first and second base fabrics depending on the state of being extended rearward, even if the direction of the inflator is slightly different from the direction in which the airbag is to be inflated, By appropriately setting the first and second base fabrics, the airbag can be accurately inflated in the direction in which it is desired to be inflated.
[0014]
  in this case,Claim 1According to the feature, if the distance from the inflator to the occupant is relatively long, the first and second base fabrics may be configured according to this, depending on the lengths of the first and second base fabrics. The position of the receiving base fabric when the airbag is inflated can be set to be appropriate for the occupant.
[0015]
[IV]
  Claim 1According to the above feature, the center of the second base fabric is the center of the upper portion of the airbag (see FIG. 4B). In this case, as described in [I] above, one side of the first and second base fabrics is connected, and the other side of the first and second base fabrics are joined.BecauseThe joint portion does not exist in the center of the second base fabric.
[0016]
  ThisClaim 1According to the characteristics, when the inflator gas flows into the airbag and the airbag is inflated, the inflator gas hits the center of the upper part of the airbag (the center of the second base fabric) and lifts up. Since there is no joining portion at the center of the upper part of the airbag (the center of the second base fabric), as in Patent Document 1, a situation occurs in which the gas of the inflator leaks at the joining part at the center of the upper part of the airbag. There is nothing.
[0017]
[V]
  Claim 1According to the characteristics, when the airbag is configured in a bag shape as described in the preceding item [I], the outer peripheral portions (front and rear side portions, side side portions) of the first and second base fabrics are joined, The point which can comprise an airbag in a bag shape, since the one side part of the 1st and 2nd base fabric is connected beforehand, the outer peripheral part (front and back sides of the 1st and 2nd base fabric) Part, side side), and when the outer peripheral parts (front and rear sides, side parts) of the first and second base fabrics are joined, Since the lower side portion and the end portion of the auxiliary base fabric can be joined together, the entire joining length when the airbag is configured in a bag shape can be suppressed to a short one.
  According to the features of claim 1,The first base cloth, the second base cloth, the receiving base cloth, and the auxiliary base cloth are integrally configured by a single cloth body.
  by this,Claim 1According to the characteristics, the first base fabric, the second base fabric, Receiving base cloth and auxiliary base clothIt is not necessary to prepare separately and join by sewing or the like to obtain an airbag in a deployed state (state before joining) as described in [I] above.
[0018]
[VI]
  Claim 2According to the featuresClaim 1In the same manner as in the above case, the “action” described in the preceding paragraphs [I] to [V] is provided, and in addition to this, the following “action” is provided.
  Claim 2According to the above feature, when the first base fabric is provided with an attachment portion attached to the inflator, the auxiliary base fabric is provided with an attachment portion attached to the inflator together with the attachment portion of the first base fabric.
  ThisClaim 2According to the feature, since the attachment portion of the first base fabric and the auxiliary base fabric is attached to the inflator, the attachment strength of the airbag to the inflator is higher than when only the attachment portion of the first base fabric is attached to the inflator. Can be a thing.
[0019]
[0020]
DETAILED DESCRIPTION OF THE INVENTION
[1]
  FIG. 1 shows a state in which an airbag is deployed (a state before joining), and includes a first base cloth 1, a second base cloth 2, a receiving base cloth 3, a first auxiliary base cloth 4, and a second auxiliary base cloth 5. The first base cloth 1, the second base cloth 2, the receiving base cloth 3, the first and second auxiliary base cloths 4, 5 are integrally cut from one cloth body 10 (see FIG. 6). It is configured.
[0021]
  As shown in FIG. 1, the first base fabric 1 has a hexagonal shape (see the first mountain fold line portion A1 and the second mountain fold line portion A2), and the front side corresponding to the front side of the vehicle body when inflated. 1a, a rear side 1b corresponding to the rear side of the vehicle body when inflated, a first side portion 1c and a second side portion 1d corresponding to one of the right and left sides of the vehicle body when inflated. An opening 1e for attaching the inflator 6 is provided near the front side 1a. In the first base fabric 1, the side portion corresponding to the other of the right side and the left side of the vehicle body at the time of expansion is connected to the second base fabric 2 and the catch through the first and second mountain fold line portions A1 and A2. Connected to the base fabric 3.
[0022]
  As shown in FIG. 1, the second base fabric 2 has the same shape and the same size as the first base fabric 1 (see the first mountain fold line portion A1 and the third mountain fold line portion A3). ), A front side 2a corresponding to the front side of the vehicle body during expansion, a rear side 2b corresponding to the rear side of the vehicle body during expansion, and a first side side corresponding to one of the right side and left side of the vehicle body during expansion. 2c and the 2nd side part 2d are provided. In the second base fabric 2, the side portion corresponding to the other of the right side and the left side of the vehicle body when inflated is connected to the first base fabric 1 and the catch through the first and third mountain fold line portions A1, A3. Connected to the base fabric 3.
[0023]
  As shown in FIG. 1, the receiving base fabric 3 has an elongated hexagonal shape (see the second and third mountain fold line portions A2 and A3), and a first valley fold line portion B1 is set at the center. . Upper side portion 3a corresponding to the upper side of the vehicle body at the time of expansion, lower side portion 3b corresponding to the lower side of the vehicle body at the time of expansion, first side side portion 3c corresponding to one of the right side and the left side of the vehicle body at the time of expansion A side base 3 d is provided on the receiving base fabric 3. In the receiving base fabric 3, the side portions corresponding to the other of the right side and the left side of the vehicle body at the time of expansion are connected to the first and second base fabrics 1 via the second and third mountain fold line portions A2 and A3. , 2 is connected.
[0024]
  As shown in FIG. 1, the 1st auxiliary | assistant base fabric 4 is carrying out the rectangular shape (refer 2nd valley fold line part B2), and the center of the upper side part 3a of the receiving base fabric 3 via 2nd valley fold line part B2 Connected to the department. In the first auxiliary base cloth 4, an opening 4b for attaching an inflator 6 to be described later is provided in the vicinity of the end 4a, and an opening 4c is provided between the opening 4b and the second valley fold line B2.
[0025]
  As shown in FIG. 1, the second auxiliary base fabric 5 has the same shape and the same size as the first auxiliary base fabric 4 (see the fourth mountain fold line portion A4), and the fourth mountain fold line. It is connected to the central part of the lower side 3b of the receiving base fabric 3 through the part A4. In the second auxiliary base fabric 5, an opening 5b for attaching an inflator 6 described later is provided in the vicinity of the end portion 5a. In this case, the first auxiliary base fabric 4 is set to be slightly longer than the second auxiliary base fabric 5.
[0026]
[2]
  Next, a process of joining the airbag in a deployed state (state before joining) as described in [1] above to a bag shape will be described.
  In the airbag in the unfolded state (the state before joining) shown in FIG. 1, as shown in FIG. 2 (a), the first, second, third fold line portions A1, A2, A3 are folded in a mountain, 1 and 2nd base fabrics 1 and 2 are piled up. The first valley fold line B <b> 1 is valley-folded to fold the receiving base cloth 3 into two, and the receiving base cloth 3 is sandwiched between the first and second base cloths 1 and 2. As shown in FIG. 2 (b), the fourth fold line portion A4 is fold-folded, the second valley fold line portion B2 is fold-folded, and the first and second auxiliary base fabrics 4, 5 are overlapped. The first and second auxiliary base fabrics 4 and 5 are superposed on the first base fabric 1 (the side opposite to the second base fabric 2).
[0027]
  Accordingly, as shown in FIGS. 2A and 2B and FIG. 3A, the rear side portion 1b of the first base fabric 1, the lower side portion 3b of the receiving base fabric 3, and the first base fabric 1 are shown. The side part 1c, the first side part 3c of the receiving base cloth 3, the rear side part 2b of the second base cloth 2, the upper side part 3a of the receiving base cloth 3, the first side part 2c of the second base cloth 2, and The second side portion 3d of the receiving base fabric 3 is combined. The second side edge 1d of the first base cloth 1 and the second side edge 2d of the second base cloth 2, and the front side 1a of the first base cloth 1 and the front side 2a of the second base cloth 2 are combined. The Front side portions 1a and 2a of the first and second base fabrics 1 and 2 and end portions 4a and 5a of the first and second auxiliary base fabrics 4 and 5, an opening 1e of the first base fabric 1, and the first and second portions. The openings 4b and 5b of the auxiliary base fabrics 4 and 5 are combined.
[0028]
  2 (a) and 2 (b) and FIG. 3 (a), the rear side 1b of the first base fabric 1, the lower side 3b of the receiving base fabric 3, and the first side 1c of the first base fabric 1 are shown. And the first side portion 3c of the receiving base fabric 3 are joined by sewing. The rear side 2b of the second base fabric 2 and the upper side 3a of the receiving base fabric 3, the first side 2c of the second base fabric 2 and the second side 3d of the receiving base fabric 3 are sewn by sewing. Join. The second side edge 1d of the first base cloth 1, the second side edge 2d of the second base cloth 2, the front side 1a of the first base cloth 1, and the front side 2a of the second base cloth 2, Join by sewing. The front side portions 1a, 2a of the first and second base fabrics 1, 2 and the end portions 4a, 5a of the first and second auxiliary base fabrics 4, 5 are joined by sewing.
[0029]
  After the joining as described above, the first and second base fabrics 1 and 2 and the first and second auxiliary base fabrics 4 and 5 as shown in FIGS. Is inverted 180 °. As a result, the front side portions 1a, 2a of the first and second base fabrics 1, 2 and the end portions 4a, 5a of the first and second auxiliary base fabrics 4, 5 are directed outward (FIG. 3 (A) ( (B) is inward (see FIG. 3 (c)), and the second base fabric 2 is located between the first base fabric 1 and the first and second auxiliary base fabrics 4, 5. Become.
[0030]
  Next, as shown in FIG. 3 (c) to FIG. 3 (d), the second base cloth 2, the first and second auxiliary base cloths 4, 5 are inserted into the opening 1e of the first base cloth 1, Invert the whole. Accordingly, as shown in FIG. 4 (a), the front side portions 1a and 2a, the rear side portions 1b and 2b, the first and second side side portions 1c and 2c, and the first and second base fabrics 1 and 2, respectively. 1d, 2d, upper side 3a, lower side 3b, first and second side sides 3c, 3d, end portions 4a, 5a of first and second auxiliary base fabrics 4, 5 are directed inward. Become.
[0031]
[3]
  The airbag obtained as described in [1] and [2] above is for a passenger seat, and as shown in FIG. 4 (a), the first base fabric 1, the first and second auxiliary base fabrics 4 are used. , 5 with the inflator 6 and the upper pressing plate 7 inserted into the openings 1e, 4b, 5b, and the upper and lower pressing plates 7, 8 to insert the first base fabric 1, the first and second auxiliary base fabrics 4 , 5 are sandwiched around the periphery of the openings 1e, 4b, 5b and tightened with bolts.
[0032]
  Accordingly, the inflator 6 is attached to the airbag, and the airbag and the inflator 6 are arranged inside the upper portion of the instrument panel 9 as shown in FIG. In this case, the inflator 6 is oriented upward of the vehicle body or slightly obliquely rearward of the vehicle body, so that the second base fabric 2 is covered on the upper side of the inflator 6 (see FIG. 4 (A)). 6 is in a state of being located in the vicinity of the front side portions 1a and 2a of the first and second base fabrics 1 and 2 and in the vicinity of the end portions 4a and 5a of the first and second auxiliary base fabrics 4 and 5.
[0033]
  When the airbag is inflated by the gas of the inflator 6 in the above-described state, the gas of the inflator 6 lifts the second base fabric 2 to the receiving base fabric 3 as shown in FIGS. 4 (b) and 5 (b). The first and second base cloths 1 and 2 and the first and second auxiliary base cloths 4 and 5 are extended to the rear of the vehicle body. The rear side portion 2b of the second base fabric 2 and the first auxiliary base fabric 4 are lifted, the upper side portion 3a of the receiving base fabric 3 is lifted, and the receiving base fabric 3 folded in two is extended above the vehicle body. It will be in a state to be. The vicinity of the first and second side portions 3c, 3d of the receiving base fabric 3 and the vicinity of the other side portion are bent toward the rear of the vehicle body, and the receiving base fabric 3 becomes rectangular when viewed from the occupant.
[0034]
  In this case, when the gas of the inflator 6 flows toward the receiving base cloth 3, the first auxiliary base cloth 4 is positioned between the inflator 6 and the receiving base cloth 3, as shown in FIG. Therefore, the gas of the inflator 6 is obstructed by the first auxiliary base cloth 4 and hardly flows into the central part of the receiving base cloth 3, and the first and second side portions 3 c and 3 d of the receiving base cloth 3 are on the other side. It becomes easy to flow to the side. As a result, the expansion of the central portion of the receiving base fabric 3 is delayed with respect to the expansion of the lateral side portion of the receiving base fabric 3, and the receiving base fabric 3 tends to be flat. The state in which the receiving base fabric 3 expands quickly and becomes spherical toward the passenger is suppressed.
[0035]
  As shown in FIGS. 1 and 4 (b), the first and second auxiliary base fabrics 4 and 5 are connected to the central portions of the upper side 3a and the lower side 3b of the receiving base fabric 3, whereby the receiving base fabric. The state in which the center part of 3 is going to expand is suppressed, and the lateral side part of the receiving base cloth 3 is in a state where it is easy to expand. Accordingly, the state where the central portion of the receiving base cloth 3 expands and the receiving base cloth 3 becomes spherical toward the passenger is suppressed, and the receiving base cloth 3 tends to be flat.
[0036]
[First Alternative Embodiment of the Invention]
  In the above-described [Embodiment of the invention], when only a plurality of airbags in an unfolded state are integrally cut from one cloth body 10, the directions of the airbags are alternately reversed as shown in FIG. Thus, the first auxiliary base fabrics 4 of the adjacent airbags are arranged side by side, and the second auxiliary base fabrics 5 of the adjacent airbags are arranged side by side.
[0037]
  When configured as described above, a portion of the cloth body 10 other than the airbag to be cut can be reduced, and the yield can be improved. In this case, the directionality of the airbag with respect to the single cloth body 10 becomes uniform only by the directions of the airbags cut with respect to the single cloth body 10 being opposite to each other. Less sticky.
[0038]
[Second Embodiment of the Invention]
  In the above-mentioned [Embodiment of the invention] and [First another embodiment of the invention], in the airbag, the first and second auxiliary base fabrics 4 with respect to the upper and lower side portions 3a and 3b of the receiving base fabric 3 are described. 5 are connected to each other at right angles, but the first and second auxiliary base fabrics 4 and 5 are connected to the upper and lower side portions 3a and 3b of the receiving base fabric 3 as shown in FIG. You may comprise so that it may incline so that 1 and 2 may be followed.
[0039]
  When configured as described above, when a plurality of airbags are integrally cut from one cloth body 10 as shown in FIG. 7, the airbags are arranged while alternately reversing the directions of the airbags, When the first auxiliary base fabrics 4 of the adjacent airbags are arranged and the second auxiliary base fabric 5 of the adjacent airbags are arranged, the opposite airbags are moved closer to each other in the vertical direction on the paper surface of FIG. be able to.
[0040]
  Thereby, the width W of one cloth body 10 can be made smaller as compared with [First different embodiment of the invention] (see FIG. 6). In this case, as in [First Embodiment of the Invention], the direction of the airbag cut to one cloth body 10 is just opposite to each other. Since the directionality is uniform, there is less variation in the performance of the airbag.
[0041]
  As described above, the first and second auxiliary base fabrics 4 and 5 are inclined along the first and second base fabrics 1 and 2 with respect to the upper and lower side portions 3a and 3b of the receiving base fabric 3. When configured to connect, as shown in FIGS. 2 (a) and 2 (b), the front side portions 1a, 2a of the first and second base fabrics 1, 2 and the first and second auxiliary base fabrics 4, 5 As shown in FIG. 8, the first and second auxiliary base fabrics 4 and 5 connected to the upper and lower side portions 3 a and 3 b of the receiving base fabric 3 when joining the end portions 4 a and 5 a by sewing. What is necessary is just to make it fold diagonally with respect to the receiving base cloth 3 and lower side part 3a, 3b.
[0042]
[Third Another Embodiment of the Invention]
  In the above-mentioned [Embodiment of the invention] and [First another embodiment of the invention], when the reinforcing base fabric 11 is provided in the vicinity of the opening 1e (for attaching the inflator 6) of the first base fabric 1, You may comprise as shown in FIG.
[0043]
  As shown in FIG. 9, in a state where only a plurality of airbags in an unfolded state are integrally cut from a single fabric body 10, the airbags are arranged with the directions of the airbags alternately reversed, and the adjacent airbags are arranged. When the first auxiliary base fabric 4 is arranged and the second auxiliary base fabric 5 of the adjacent airbag is arranged, the portion between the first and second base fabrics 1 and 2 of the adjacent airbag is reinforced. As the base fabric 11, the reinforcing base fabric 11 is cut in a state of being connected to the first base fabric 1. Accordingly, as shown in FIGS. 10A and 10B, after the airbag is cut, the first base fabric 1 is folded at the portion where the first base fabric 1 and the reinforcing base fabric 11 are connected to each other. 1, the opening 11 a of the reinforcing base cloth 11 is aligned with the opening 1 e of the first base cloth 1, and the reinforcing base cloth 11 is joined to the first base cloth 1 by sewing.
[0044]
  If comprised in this way, when the reinforcement base cloth 11 is provided in the vicinity of the opening 1e of the 1st base fabric 1, in an airbag, parts other than the airbag to cut can be decreased in the one fabric body 10. FIG. , Can improve the yield. In this case, as in [First Embodiment of the Invention], the direction of the airbag cut to one cloth body 10 is just opposite to each other. Since the directionality is uniform, there is less variation in the performance of the airbag.
[0045]
[Fourth Embodiment of the Invention]
  In the above-mentioned [Embodiment of the invention] to [Third another embodiment of the invention], the first and second auxiliary base fabrics 4 and 5 are integrally cut from the single cloth body 10 on the receiving base fabric 3. The first and second auxiliary base fabrics 4 and 5 are cut separately from the receiving base fabric 3, and the first and second upper base fabrics 3 and the lower side portions 3a and 3b have first and You may comprise so that the 2nd auxiliary | assistant base fabrics 4 and 5 may be joined. Moreover, without providing both the first and second auxiliary base fabrics 4 and 5, only the first auxiliary base fabric 4 is provided and the second auxiliary base fabric 5 is abolished or the first auxiliary base fabric 4 is abolished. The second auxiliary base fabric 5 may be provided alone, or both the first and second auxiliary base fabrics 1 and 2 may be provided.
[0046]
  As a result, when a plurality of airbags in a deployed state are integrally cut from a single cloth body 10, the airbags are arranged with the directions of the airbags alternately reversed as shown in FIG. What is necessary is just to comprise so that parts other than the airbag cut | judged in the fabric body 10 may be cut | judged as a base fabric for reinforcement.
  If comprised as mentioned above, in the sheet | seat body 10, parts other than the airbag to cut can be decreased, and a yield can be made favorable. In this case, as in [First Embodiment of the Invention], the direction of the airbag cut to one cloth body 10 is just opposite to each other. Since the directionality is uniform, there is less variation in the performance of the airbag.
[0047]
[Fifth Embodiment of the Invention]
  In the above-mentioned [Embodiment of the invention] to [Fourth embodiment of the invention], joining is performed by sewing, but an air bag is used as in the case of joining by adhesive, high frequency, ultrasonic wave, heat welding, or the like. Various types of bonding can be employed depending on the material. As the material of the air bag, not only the woven fabric woven with synthetic fibers but also the one configured in the form of a resin sheet can be adopted. These are collectively referred to as the first and second base fabrics 1, 2, The receiving base cloth 3 and the first and second auxiliary base cloths 4 and 5 are used.
[0048]
  In the above-mentioned [Embodiment of the invention] to [Fourth embodiment of the invention], the first and second auxiliary base fabrics 4, 5 are provided on the receiving base fabric 3 and at the center of the lower side portions 3a, 3b. Is positioned on the receiving base fabric 3 on the upper and lower sides 3a, 3b, the first side and the second side 3c, 3d and the other side And the 2nd auxiliary | assistant base fabrics 4 and 5 may be located.
  The airbag of the present invention can be used not only for a passenger seat but also for a driver seat or for a rear seat.
[0049]
【The invention's effect】
  Claim 1According to the features, when the airbag is inflated, the surface of the catching base fabric that catches the occupant can be configured to be a rectangular shape (for example, a rectangular shape) instead of a circular shape as seen from the occupant. The area of the surface of the base fabric can be increased, which is advantageous in that the load when the occupant is received by the inflated airbag is distributed without being concentrated on a part of the occupant. .
[0050]
  Claim 1According to the feature of the present invention, by providing the auxiliary base fabric, when the airbag is inflated, the central portion side of the receiving base fabric is inflated so that the receiving base fabric becomes spherical toward the passenger, and the receiving base fabric is suppressed. This is advantageous in that the load when the occupant is received by the inflated airbag is dispersed without being concentrated on a part of the occupant.
[0051]
  Claim 1According to the characteristics, by appropriately setting the first and second base fabrics, the airbag can be accurately inflated in the direction in which the airbag is to be inflated so that the position of the receiving base fabric during the inflation is appropriate for the occupant It has become possible to set an air bag suitable for various vehicles.
[0052]
  Claim 1According to the feature, since there is no joining portion at the center of the upper portion of the airbag (the center of the second base fabric), when the inflator gas flows into the airbag and the airbag is inflated, the inflator gas is Even if it hits the center of the upper part (the center of the second base fabric) and lifts, there will be no situation where the inflator gas leaks at the joint at the center of the upper part of the airbag. The possibility of developing into a situation where the expansion of the lag is delayed was able to be suppressed.
[0053]
  Claim 1According to the feature, when the auxiliary base fabric as described above is provided, the overall joining length when the airbag is configured in a bag shape can be suppressed to a short one. In this way, the production cost could be reduced while improving the performance of the airbag.
  Claim 1According to the characteristics, the first base fabric, the second base fabric, Receiving base cloth and auxiliary base clothThis is advantageous in terms of reducing production costs because it is not necessary to prepare the airbag separately and join it by sewing, etc. to obtain an airbag in a deployed state (before joining). It became a thing.
[0054]
  Claim 2According to the featuresClaim 1As in the case ofClaim 1In addition to the “effect of the invention”, the following “effect of the invention” is provided.
  Claim 2According to the feature of the present invention, the attachment portion of the first base fabric and the auxiliary base fabric is attached to the inflator, and the attachment strength of the airbag to the inflator can be increased, thereby increasing the reliability of the operation of the airbag. I was able to.
[0055]
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which an airbag is deployed (a state before joining).
FIG. 2 is a perspective view showing a state in which the first and second base fabrics, the receiving base fabric, and the first and second auxiliary base fabrics are overlapped and joined from the state shown in FIG.
3 reverses the first and second base fabrics and the first and second auxiliary base fabrics by 180 ° from the state shown in FIG. 2, and the second base fabric, the first and second auxiliary fabrics are opened in the opening of the first base fabric. Sectional drawing which shows the state which inserted the base fabric and reversed the whole
FIG. 4 is a cross-sectional view showing a state where an airbag is attached to an inflator and a state where the airbag is inflated.
FIG. 5 is a side view of the vicinity of the instrument panel showing a state where the airbag is inflated.
FIG. 6 is a plan view showing a state in which a plurality of airbags in a deployed state are integrally cut from a single cloth body in a first alternative embodiment of the invention;
FIG. 7 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from a single cloth body in a second alternative embodiment of the invention;
FIG. 8 is a front view showing a state in which the first and second base fabrics, the receiving base fabric, and the first and second auxiliary base fabrics are overlapped and joined in the second alternative embodiment of the invention.
FIG. 9 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from one cloth body in a third alternative embodiment of the invention;
FIG. 10 is a plan view showing a state in which the reinforcing base fabric is overlapped and joined to the first base fabric in a third alternative embodiment of the invention;
FIG. 11 is a plan view showing a state in which only a plurality of airbags in a deployed state are integrally cut from one cloth body in a fourth alternative embodiment of the invention;
[Explanation of symbols]
  1 First fabric
  1a Front side of the first base fabric
  1b Rear side of the first base fabric
  1c, 1d Side edges of the first base fabric
  1e First base fabric attachment
  2 Second base fabric
  2a Front side of the second base fabric
  2b Rear side of the second base fabric
  2c, 2d Side edges of the second base fabric
  3 receiving base fabric
  3a Upper side of the receiving base fabric
  3b Lower side of receiving base fabric
  3c, 3d Side edges of receiving base fabric
  4,5 Auxiliary base fabric
  4b, 5b Auxiliary base attachment
  6 Inflator

Claims (2)

A front side corresponding to the front side of the vehicle body at the time of expansion, a rear side portion corresponding to the rear side of the vehicle body at the time of expansion, one and the other side sides corresponding to the right and left sides of the vehicle body at the time of expansion, A first base fabric comprising an inflator mounting portion;
A front side portion corresponding to the front side of the vehicle body when inflated, a rear side portion corresponding to the rear side of the vehicle body when expanded, and one and other side portions corresponding to the right and left sides of the vehicle body when expanded. A second base fabric,
An upper side corresponding to the upper side of the vehicle body when expanded, a lower side corresponding to the lower side of the vehicle body when expanded, and one and the other side portions corresponding to the right and left sides of the vehicle body when expanded Equipped with an occupant receiving base fabric,
One side of the first base fabric and one side of the second base fabric are connected, and one side of the receiving base fabric and one side of the first and second base fabrics. A first base fabric, a second base fabric, a receiving base fabric and an auxiliary base fabric are connected to each other by connecting an upper base portion or a lower side portion of the receiving base fabric with an auxiliary base fabric. And integrated into
The rear side of the first base fabric and the lower side of the receiving base fabric are joined, the rear side of the second base fabric and the upper side of the receiving base fabric are joined, and the first and second An airbag in which the other side portion of the receiving base fabric is joined and the front side portions of the first and second base fabrics and the end portion of the auxiliary base fabric are joined . The airbag according to claim 1, wherein the auxiliary base fabric includes an attachment portion that is attached to the inflator together with the attachment portion of the first base fabric .

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