JP2009029357A - Seat belt device with airbag - Google Patents

Abstract

To provide a seat belt device with an airbag, which can be more easily equipped with an airbag that can move relative to a webbing.
A webbing covering sheet 22 disposed on the inside and a storage cover 21 disposed on the outside sandwich the webbing 2 from the front and back sides, and the webbing covering sheet 22 and the end portions 21a, 21b of the storage cover 21 stacked on each other are disposed. 22 a and 22 b are joined to form an annular shape, and the airbag body 20 is interposed between the webbing covering sheet 22 and the storage cover 21 on at least one of the front and back sides of the webbing 2.
[Selection] Figure 5

Description

  The present invention relates to a seat belt device with an airbag.

2. Description of the Related Art As a conventional seat belt device with an air bag, a device in which a bag-like belt (air belt) is used as an air bag is known. In this seatbelt device with an airbag, the airbag is fixed to the webbing, and the extra length of the webbing is wound around the retractor when the seatbelt is not attached (see, for example, Patent Document 1).
Japanese Patent No. 3598781

  However, in the above prior art, since the airbag is fixed to the webbing, the displacement of the airbag becomes large when the seat belt is worn and when the seat belt is not worn. At this time, since the airbag cannot be wound around the retractor, the layout of the retractor becomes difficult, the slack of the webbing must be allowed when the seat belt is not worn, or the airbag must be shortened. There was a case.

  As a countermeasure, if the airbag can be relatively moved along the webbing, the airbag can be arranged at a more appropriate position.

  However, when installing an airbag that can move relative to the webbing, storing the airbag body in a tube-like cover and inserting the webbing can be cumbersome and reduce productivity. This causes a problem that the manufacturing cost increases.

  Therefore, an object of the present invention is to provide a seat belt device with an airbag that can be more easily equipped with an airbag that can move relative to the webbing.

  In the seatbelt device with an airbag according to the present invention, the webbing covering sheet and the storage cover, which are overlapped with each other, are sandwiched from the front and back sides by the webbing cover sheet disposed inside and the storage cover disposed outside. The main feature is that the end portions are joined to form an annular shape, and the airbag body is interposed between the webbing covering sheet and the storage cover on at least one of the front and back sides of the webbing.

  According to the present invention, the webbing covering sheet overlapped from both the front and back sides of the webbing and the end portions of the storage cover are joined together to form an annular portion surrounding the webbing and to be equipped with the airbag. The operation can be simplified as compared with the case where the airbag main body is housed in the tubular cover and the webbing is inserted. For this reason, productivity can be improved and manufacturing cost can be reduced.

  (First Embodiment) FIGS. 1 to 7 show a seatbelt device with an air bag according to a first embodiment of the present invention. 1 is an overall perspective view of a seat equipped with a seat belt device with an airbag, and FIG. 2 is a schematic view of the seat belt device with an airbag.

  The seatbelt device 1 with an airbag according to the present embodiment is configured as a so-called three-point seatbelt device. That is, the webbing 2 is slanted between either the left or right side of the shoulder (the left side in the present embodiment) and the other side of the waist (the right side), and is folded back by the tongue 4 to It is horizontal on both sides. The airbag-equipped seat belt device 1 is mounted on a seat S including a seat cushion Sc, a seat back Sb, and a headrest Sh.

  In the present embodiment, one side (shoulder side) in the longitudinal direction of the webbing 2 is wound by the retractor 3S and pulled out from the retractor 3S, while the other side is fixed to the seat S or the vehicle body by the fixed end 13L. It is fixed.

  In the webbing 2, strip-shaped airbags 7S and 7L extending in the longitudinal direction are arranged in series. At least one of the two airbags 7S and 7L is configured to be movable relative to the webbing 2. In the present embodiment, the first airbag 7 </ b> S corresponding to the chest of the occupant is configured to be movable relative to the webbing 2, and the other second airbag 7 </ b> L is fixed to the webbing 2.

  The webbing 2 is provided with a tongue 4 that is movable along the longitudinal direction thereof. The tongue 4 is formed with an insertion port 4a having an elongated rectangular cross section, and the webbing 2 is inserted through the insertion port 4a. The cross-sectional area of the insertion port 4a is smaller than the cross-sectional area of the airbags 7S and 7L, and the tongue 4 moves only between the two airbags 7S and 7L.

  The tongue 4 can be engaged and disengaged with a buckle 5 fixed to the vehicle body or the seat S. When the seat belt is not attached when the tongue 4 is detached from the buckle 5, the webbing 2 is wound up by the retractor 3S. On the other hand, when the seat belt is worn, the webbing 2 is pulled out from the retractor 3 </ b> S and the tongue 4 is locked to the buckle 5. At this time, the second airbag 7L is disposed at a position corresponding to the occupant's waist when the seat belt is worn, and the first airbag 7S is disposed at a position corresponding to the chest of the occupant.

  Air is supplied to the airbags 7S and 7L from the corresponding inflators 12S and 12L via the tubes 11S and 11L, respectively. When air is supplied from the inflators 12S and 12L at the time of a vehicle collision or the like, the airbags 7S and 7L are inflated and deployed, respectively. The tube 11S that supplies air to the first airbag 7S that moves together with the webbing 2 has flexibility, and even if the position of the air inlet to the first airbag 7S changes, Air can be supplied stably.

  A box 9 is attached to the upper end of the seat back Sb. A guide 10 on which the webbing 2 is hung is provided in the box 9, and the retractor 3 </ b> S is disposed at a position below the guide 10 in the seat back Sb.

  In the present embodiment, the first airbag 7S that can move relative to the webbing 2 is provided with a variable stopper 8 that switches between a state in which relative movement with respect to the webbing 2 is restricted and a state in which the relative movement is allowed. .

  When the webbing 2 is wound around the retractor 3S, the variable stopper 8 is used until the first airbag 7S reaches a first restriction release position (not shown) before being wound around the retractor 3S. The relative movement with the webbing 2 is restricted, and the relative movement with the webbing 2 is allowed after reaching the first restriction release position. Further, when the webbing 2 is pulled out from the retractor 3S, the variable stopper 8 is webbed until it reaches a second restriction release position (not shown) corresponding to the occupant on which the first airbag 7S is seated. The relative movement with respect to the webbing 2 is allowed after reaching the second restriction release position.

  FIG. 3 is a schematic view showing movement of each part accompanying winding or pulling out of the webbing, where (a) is a diagram showing a seat belt wearing state in which the webbing is pulled out, and (c) is a webbing being wound up. The figure which shows a seatbelt non-wearing state, (b) is a figure which shows the intermediate state. Note that FIG. 3 shows the webbing drawn from the retractor 3S in a state where the webbing is extended in a plane, and it goes without saying that the positions of the retractor 3S and the fixed end 13L in the vehicle body do not change.

  In the seat belt device 1 with the airbag according to the present embodiment, the tongue 4 is attached to the buckle 5 (see FIG. 1) and the webbing 2 is pulled out from the retractor 3S in the attached state, as shown in FIG. It is in the state.

  Here, when the tongue 4 is detached from the buckle 5, the webbing 2 is taken up by the retractor 3 </ b> S, and accordingly, the second airbag 7 </ b> L together with the webbing 2 is retracted as shown in FIG. Move to the side close to 3S. Then, the first airbag 7S that can move relative to the webbing 2 moves so as to approach the retractor 3S by being pushed by the second airbag 7L, and finally the state shown in FIG. It becomes.

  As shown in FIG. 3, in the present embodiment, the first airbag 7 </ b> S can be moved relative to the webbing 2. With this configuration, the first airbag 7S can be more appropriately arranged when in use, and when not in use, the airbags 7S and 7L and the tongue 4 are arranged in series as shown in FIG. Thus, storage in a more compact state becomes possible.

  4 is an enlarged perspective view showing a part of the first airbag that can move relative to the webbing, FIG. 5 is a VV cross-sectional view (longitudinal cross-sectional view) of FIG. 4, and FIG. It is explanatory drawing which shows the process in the middle of assembling a 1st airbag.

  As shown in FIG. 4, the first airbag 7 </ b> S according to the present embodiment includes an airbag body 20 that is stored in a folded state, a storage cover 21 that forms the outermost layer, and a webbing coating that covers the periphery of the webbing 2. And a sheet 22.

  The storage cover 21 is composed of a substantially rectangular sheet-like member or plate-like member. As shown in FIG. 6, the storage cover 21 is folded in half at the center in the width direction and assembled as shown in FIG. 5. As shown, the whole is surrounded from the outside.

  The webbing covering sheet 22 is composed of a substantially rectangular sheet-like member. Specifically, the webbing covering sheet 22 can be composed of a synthetic resin sheet such as polypropylene. As shown in FIG. 6, the webbing covering sheet 22 is also folded in half at the center in the width direction, and surrounds the entire circumference of the webbing 2 as shown in FIG.

  When the first airbag 7S is assembled and attached to the webbing 2, first, as shown in FIG. 6, the storage cover 21, the airbag main body 20, the webbing covering sheet 22, and the webbing 2 are laminated in this order. At this time, the airbag main body 20 and the webbing 2 are arranged close to one side (the right side in FIG. 6) with respect to the central portion in the width direction of the storage cover 21 and the webbing covering sheet 22. The airbag body 20 and the webbing coating sheet 22 are bonded. Reference numeral 23 denotes an adhesive layer.

  In this state (deployed state), the storage cover 21 and the webbing covering sheet 22 are folded in half as indicated by an arrow P with the center portion in the width direction as a folding line. And the width direction both ends 21a and 21b of the storage cover 21 and the width direction both ends 22a and 22b of the webbing coating sheet 22 are overlapped, and these are integrally joined to assemble the first airbag 7S. Thus, the first airbag 7S is attached so as to surround the webbing 2 (see FIGS. 4 and 5).

  At this time, in this embodiment, as shown in FIG. 5, the end portions 22a and 22b of the webbing covering sheet 22 are sandwiched so as to be wound inside by the end portions 21a and 21b of the storage cover 21, respectively. The folded portions 21c and 21d of the end portions 21a and 21b of the storage cover 21 are interposed between the end portions 22a and 22b. This eliminates exposure of the ends (edges) of the end portions 21a, 21b, 22a, and 22b, thereby improving the aesthetic appearance. In addition, the height of the portion of the webbing 2 that surrounds the webbing 2 (the webbing 2) (The height in the thickness direction) can be secured, and the sliding resistance between the webbing 2 and the webbing coating sheet 22 can be reduced.

  The ends 21a, 21b, 22a, 22b may be joined by sewing using the sewing thread 24, or may be joined by bonding or the like.

  FIG. 7 is a plan view showing a developed state of the webbing covering sheet. In this embodiment, as shown in FIG. 7, a plurality of substantially circular holes 22h are formed in the webbing covering sheet 22.

  According to the seatbelt device 1 with an airbag according to the present embodiment having the above configuration, the webbing 2 is surrounded by the webbing covering sheet 22 provided in the first airbag 7S. The sliding resistance at the time of relative movement can be easily reduced by adjusting the specifications (material, thickness, shape, surface properties, etc.) of the webbing coating sheet 22.

  Further, in the present embodiment, the webbing covering sheet 22 and the storage cover 21 are folded in half in the center in the width direction from the unfolded state, and the webbing 2 is sandwiched from the front and back sides, and the webbing covering sheet 22 and the storage cover 21 overlapped with each other. The end portions 21a, 21b, 22a, and 22b are joined to form an annular shape. The airbag body 20 is interposed between the webbing covering sheet 22 and the storage cover 21 on at least one of the front and back sides of the webbing 2.

  That is, according to this embodiment, the webbing covering sheet 22 and the end portions 21a, 21b, 22a, and 22b of the storage cover 21 that are overlapped from both the front and back sides of the webbing 2 are joined together to join the annular portion that surrounds the webbing 2. Since the first airbag 7S is formed and installed, the work can be simplified as compared with the case where the airbag main body is housed in a previously formed tube-shaped cover and the webbing is inserted. For this reason, productivity can be improved and manufacturing cost can be reduced.

  Furthermore, in this embodiment, the end portions 21a and 21b of the storage cover 21 are folded back so as to wrap the end portions 22a and 22b of the webbing coating sheet 22 adjacent to each other, and the webbing coating sheets 22 are overlapped with each other. Folded portions 21c and 21d of the storage cover 21 are interposed between the portions 22a and 22b.

  For this reason, the appearance of the end portions 21a, 21b, 22a, 22b can be eliminated and the appearance can be improved. In addition, it becomes easier to secure the height of the portion of the webbing coating sheet 22 covered by the webbing coating sheet 22 by the thickness of the folded portions 21c and 21d, and the first airbag 7S moves relative to the webbing 2. Sliding resistance can be reduced.

  Furthermore, in the present embodiment, the webbing coating sheet 22 can be provided with a plurality of holes 22h, so that the flexibility of the webbing coating sheet 22 and the first airbag 7S can be increased. In addition to improving the wearing comfort, it is possible to move more smoothly along the webbing 2 because it is easier to bend. Such a configuration is particularly advantageous when the first airbag 7S is taken into the seat S.

(Second Embodiment) FIGS. 8 and 9 show a second embodiment of the present invention. Among these, FIG. 8 is a longitudinal sectional view of the first airbag according to the present embodiment, and FIG. 9 is an explanatory view showing a process in the middle of assembling the first airbag. In addition, the seatbelt apparatus with an airbag concerning this embodiment is provided with the component similar to the said 1st Embodiment. Therefore, below, the same code | symbol is attached | subjected to those similar components, and the overlapping description is abbreviate | omitted also in this embodiment, the 1st airbag 7S can move relatively with respect to the webbing 2. FIG.

  However, in the present embodiment, as shown in FIG. 8, the first airbag 7S includes two webbing coating sheets 32A and 32B that respectively coat the webbing 2 from the front and back sides, and the webbing coating sheets 32A and 32B. It has two storage covers 31A and 31B that cover the webbing 2 from the front and back sides on the outer side. Except for being divided into two parts, the specifications (material, thickness, shape, flexibility, etc.) of the webbing cover sheet 32 and the storage cover 31 are the same as the webbing cover sheet 22 and the storage cover 21 according to the first embodiment. The same can be said.

  In assembling and attaching the first airbag 7S to the webbing 2, first, as shown in FIG. 9, the storage cover 31B, the webbing coating sheet 32B, the webbing 2, the webbing coating sheet 32A, the airbag body 30, and the storage The cover 31A is stacked in this order. At this time, all the elements to be stacked are aligned and arranged at the center in the width direction (the center in the left-right direction in FIG. 9). The airbag body 30 and the webbing coating sheet 32A are bonded. Reference numeral 33 denotes an adhesive layer.

  Then, the end portions (31Aa, 31Ba, 32Aa, 32Ba) and (31Ab, 31Bb, 32Ab, 32Bb) that overlap each other are integrally joined to each other at both ends in the width direction of the webbing 2, and the first airbag 7S is joined. assemble. Thus, the first airbag 7S is attached so as to surround the webbing 2.

  At this time, even in the present embodiment, the end portions 32Aa, 32Ab, 32Ba, 32Bb of the webbing covering sheets 32A, 32B are respectively connected to the end portions 31Aa, 31Ab, 31Ba, 31Bb of the corresponding storage covers 31A, 31B. It is pinched so as to be wound inside. Thus, the folded portions 31Ac, 31Bc of the end portions 31Aa, 31Ba of the storage covers 31A, 31B are interposed between the end portions 32Aa, 32Ba of the webbing cover sheets 32A, 32B, and the end portions of the webbing cover sheets 32A, 32B. The folded portions 31Ad and 31Bd of the end portions 31Ab and 31Bb of the storage covers 31A and 31B are interposed between the 32Ab and 32Bb. Therefore, also according to the present embodiment, the height of the portion of the webbing covering sheet 32 surrounding the webbing 2 (the height in the thickness direction of the webbing 2) is secured, and the sliding resistance between the webbing 2 and the webbing covering sheet 32 is reduced. be able to.

  Note that the end portions (31Aa, 31Ba, 32Aa, 32Ba) and (31Ab, 31Bb, 32Ab, 32Bb) that overlap each other may be joined by sewing using the sewing thread 34, or by joining or the like. Also good.

  According to the seatbelt device 1 with an airbag according to the present embodiment having the above-described configuration, the storage cover 31B, the webbing coating sheet 32B, the webbing 2, the webbing coating sheet 32A, the airbag body 30, and the storage cover 31A are arranged in this order. The end portions of the webbing covering sheet 32 and the storage cover 31 that are laminated and overlapped with each other at both ends in the width direction of the webbing 2 (31Aa, 31Ba, 32Aa, 32Ba), (31Ab, 31Bb, 32Ab, 32Bb) Are formed into an annular shape. The airbag main body 30 is interposed between the webbing covering sheet 32 and the storage cover 31 on at least one of the front and back sides of the webbing 2.

  That is, also according to the present embodiment, the webbing covering sheet 32 and the end portions of the storage cover 31 (31Aa, 31Ba, 32Aa, 32Ba) and (31Ab, 31Bb, 32Ab, 32Bb) that are overlapped from the front and back sides of the webbing 2 are joined. As a result, an annular portion surrounding the webbing 2 is formed and the first airbag 7S is provided, so that the airbag body is housed in a pre-formed tubular cover and the webbing is inserted. Work can be simplified. For this reason, productivity can be improved and manufacturing cost can be reduced.

  And also in this embodiment, each edge part 32Aa, 32Ab, 32Ba, 32Bb of webbing coating sheet 32A, 32B is wound inside by each edge part 31Aa, 31Ab, 31Ba, 31Bb of corresponding storage cover 31A, 31B, respectively. Is sandwiched in this way. Thus, the folded portions 31Ac, 31Bc of the end portions 31Aa, 31Ba of the storage covers 31A, 31B are interposed between the end portions 32Aa, 32Ba of the webbing cover sheets 32A, 32B, and the end portions of the webbing cover sheets 32A, 32B. The folded portions 31Ad and 31Bd of the end portions 31Ab and 32Bb of the storage covers 31A and 31B are interposed between the 32Ab and 32Bb.

  For this reason, also in this embodiment, the end of the end portions 31Aa, 31Ba, 32Aa, 32Ba, 31Ab, 31Bb, 32Ab, and 32Bb can be eliminated to improve the aesthetic appearance. Further, it becomes easier to secure the height of the portion of the webbing coating sheet 22 covered by the webbing coating sheet 22 by the thickness of the folded portions (31Ac and 31Bc), (31Ad and 31Bd), and the first airbag 7S. Can reduce the sliding resistance when moving relative to the webbing 2.

  Even in the present embodiment, it is preferable that a plurality of holes are formed in the webbing cover sheet 32 to increase the flexibility of the webbing cover sheet 32 as in the first embodiment.

(Third Embodiment) FIGS. 10 and 11 show a third embodiment of the present invention. 10 is a longitudinal sectional view of the first airbag according to the present embodiment, and FIG. 11 is a perspective view showing a state in which the storage cover of the first airbag is removed. In addition, the seatbelt apparatus with an airbag concerning this embodiment is provided with the component similar to each said embodiment. Therefore, below, the same code | symbol is attached | subjected to those similar components, and the overlapping description is abbreviate | omitted also in this embodiment, the 1st airbag 7S can move relatively with respect to the webbing 2. FIG.

  Further, the first airbag 7S according to the present embodiment includes a bi-fold webbing covering sheet 42 and a storage cover 41 as in the first embodiment, and the end portions 41a and 41b of the storage cover 41 are provided. By folding back, the end portions 42a and 42b of the webbing coating sheet 42 adjacent to each other are wrapped, and the folded portions 41c and 41d of the storage cover 41 are placed between the end portions 42a and 42b of the webbing coating sheet 42 that are overlapped with each other. Intervene. Reference numeral 44 denotes a suture thread.

  However, in the present embodiment, the airbag main body 40 is provided with a belt 45 as an surrounding portion surrounding the outer periphery of the webbing covering sheet 42. Specifically, the belt 45 protrudes integrally from both sides in the width direction of the outer skin of the airbag body 40 and is formed in a ring shape along the outer periphery of the webbing covering sheet 42 that sandwiches the webbing 2. A plurality of the belts 45 are provided at appropriate intervals along the longitudinal direction of the webbing 2.

  As shown in FIG. 10, in this embodiment, the webbing 2 and the webbing covering sheet 42 are inserted into the belt 45. That is, in this embodiment, the webbing 2 is inserted into the belt 45 while being sandwiched between the webbing covering sheets 42 folded in half, and then covered with the storage cover 41 folded in half.

  FIG. 12 is a plan view showing a developed state of the webbing coating sheet. As shown in FIG. 12, notches 42 </ b> C are formed at both ends 42 a and 42 b of the webbing covering sheet 42 corresponding to the portions where the belt 45 is disposed. Since it is folded in half, the cutout portion 42C is disposed opposite to each other at both end portions 42a and 42b.

  Even in the present embodiment, the webbing covering sheet 42 has a plurality of rectangular holes 42h.

  According to the seatbelt device 1 with an airbag according to the present embodiment having the above-described configuration, the airbag main body 40 is integrally provided with the belt 45 as the surrounding portion surrounding the outer periphery of the webbing covering sheet 42. And the strength of the webbing 2 can be increased. Therefore, even when an excessive force is applied in a direction away from the webbing 2 due to a reaction when the airbag main body 40 is deployed, the airbag main body 40 can be prevented from being detached from the webbing 2.

  Also in this embodiment, the webbing covering sheet 42 is provided with a plurality of holes 42h, so that the flexibility of the webbing covering sheet 42 and the first airbag 7S can be increased. In addition to improving the wearing comfort, it is possible to move more smoothly along the webbing 2 because it is easier to bend.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, the second airbag 7L may be movable relative to the webbing 2, and the present invention may be applied to the second airbag 7L.

  Further, the joining of the storage cover and the webbing covering sheet is not limited to sewing or adhesion, and a plurality of joining means may be combined. Further, when stitching, an aesthetic appearance may be improved by embroidering a geometric pattern or a logo.

  Moreover, the shape of the hole formed in the webbing coating sheet is not limited to a circle or a rectangle, and various shapes are possible.

  Moreover, the surrounding part of the airbag body is initially opened, and the webbing and the webbing covering sheet are inserted into the surrounding part and then appropriately joined (for example, welding, adhesion, locking, stitching, or a combination thereof). The go portion may be closed.

1 is an overall perspective view of a seat equipped with a seat belt device with an airbag according to a first embodiment of the present invention. It is a mimetic diagram of a seat belt device with an air bag concerning a 1st embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing movement of each part accompanying winding or pulling out of a webbing in a seatbelt device with an airbag according to a first embodiment of the present invention, wherein (a) shows a seatbelt wearing state in which the webbing is pulled out. FIG. 4C is a view showing a seat belt non-mounted state in which the webbing is wound, and FIG. 4B is a view showing an intermediate state thereof. It is a perspective view which fractures | ruptures and shows a part of airbag which can move along the webbing of the seatbelt apparatus with an airbag concerning 1st Embodiment of this invention. It is VV sectional drawing of FIG. It is explanatory drawing which shows the process in the middle of assembling the airbag which can move along the webbing of the seatbelt apparatus with an airbag concerning 1st Embodiment of this invention. It is a top view which shows the expansion | deployment state of the webbing coating | coated sheet | seat of the seatbelt apparatus with an airbag concerning 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the airbag which can move along the webbing of the seatbelt apparatus with an airbag concerning 2nd Embodiment of this invention. It is explanatory drawing which shows the process in the middle of assembling the airbag which can move along the webbing of the seatbelt apparatus with an airbag concerning 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the airbag which can move along the webbing of the seatbelt apparatus with an airbag concerning 3rd Embodiment of this invention. It is a perspective view which shows the state which removed the storage cover of the airbag which can move along the webbing of the seatbelt apparatus with an airbag concerning 3rd Embodiment of this invention. It is a top view which shows the expansion | deployment state of the webbing coating | coated sheet | seat of the seatbelt apparatus with an airbag concerning 3rd Embodiment of this invention.

Explanation of symbols

1 Seat belt device with airbag 2 Webbing 3S Shoulder side retractor (retractor)
7S Shoulder-side airbag 20, 30, 40 Airbag body 21, 31, 41 Storage cover 21a, 21b End portion 21c, 21d Folded portion 22, 32, 42 Webbing covering sheet 22a, 22b End portion 22h Hole 31Aa, 31Ab, 31Ba , 31Bb End portion 31Ac, 31Ad, 31Bc, 31Bd Folded portion 32Aa, 32Ab, 32Ba, 32Bb End portion 41a, 41b End portion 41c, 41d Folded portion 42a, 42b End portion 45 Belt (enclosure)

Claims (5)

A seat belt device with an airbag, comprising: a webbing at least one end of which is wound around a retractor; and an airbag movably attached along the webbing,
The airbag includes a webbing coating sheet that covers the webbing, an airbag body that can be expanded and inflated by the supplied gas, and a storage cover that covers the webbing outside the webbing coating sheet and stores the airbag body. And having
The webbing cover sheet and the storage cover are folded in half in the center in the width direction from the unfolded state, the webbing is sandwiched from the front and back sides, and the ends of the webbing cover sheet and storage cover that are overlapped with each other are joined to form an annular shape. And
A seat belt device with an airbag, wherein an airbag body is interposed between the webbing covering sheet and the storage cover on at least one of the front and back sides of the webbing. A seatbelt device with an airbag, comprising: a webbing at least one end of which is wound around a retractor; and an airbag attached so as to be movable along the webbing.
The airbag includes two webbing coating sheets that respectively coat the webbing from the front and back sides, an airbag main body that can be expanded and inflated by the supplied gas, and the webbing from the front and back sides outside the webbing coating sheet. Two storage covers each covering,
The storage cover, the webbing cover sheet, the webbing, the webbing cover sheet, and the storage cover are stacked in this order, and the webbing cover sheet and the end of the storage cover are stacked on each other at both ends in the width direction of the webbing. Join each other to form a ring,
A seatbelt device with an airbag, wherein an airbag body is interposed between the webbing covering sheet and the storage cover on at least one of the front and back sides of the webbing.   At the portion where the end portions of the webbing cover sheet and the storage cover are joined together, the end portions of the respective storage covers are folded back so as to wrap the end portions of the webbing cover sheet adjacent to each other, and the webbing cover sheets are overlapped with each other. The seatbelt device with an airbag according to claim 1 or 2, wherein a folded portion at an end portion of the storage cover is interposed between the end portions.   The seatbelt device with an airbag according to any one of claims 1 to 3, wherein a plurality of holes are formed in the webbing covering sheet.   The seatbelt apparatus with an airbag as described in any one of Claims 1-4 which provided the surrounding part which surrounds the outer periphery of the said webbing coating | coated sheet in the said airbag main body.

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