JP6175012B2 - Manufacturing method of seat belt device - Google Patents

Description

The present invention relates to a method for manufacturing a seat belt device .

  In the following Patent Document 1, a webbing (seat belt) constituting a lap webbing (lap belt) and a shoulder webbing (shoulder belt) that respectively support the waist and chest of an occupant, an airbag provided in the shoulder webbing, Is disclosed. According to the technique described in the document, the airbag provided in the shoulder webbing is inflated and deployed in the webbing width direction at the time of the collision of the vehicle, so that the chest of the occupant can be supported in a wider area. It has become.

JP-A-10-230807

  However, in the seat belt device described in Patent Document 1, the airbag is disposed between the pair of shoulder webbing, and both ends in the short direction of the pair of shoulder webbing are along the longitudinal direction of the shoulder webbing. Since it is configured by sewing, the thickness of the shoulder webbing portion in the seat belt device tends to be thick.

In view of the above facts, an object of the present invention is to provide a method of manufacturing a seat belt device that can reduce the thickness of a portion provided with an airbag.

According to a first aspect of the present invention, there is provided a seat belt device manufacturing method comprising: a webbing attached to an occupant seated on a vehicle seat; the webbing being fixed to the webbing; and gas being supplied to the webbing and the occupant. An airbag that inflates and deploys between the webbing and the webbing, and an end portion in the short direction is sewn to form a space in which the airbag is disposed between the webbing and the airbag. An airbag fixing step applied to a method of manufacturing a seat belt device of a seat belt device including a cover member, and fixing the airbag to one surface of the webbing by sewing; and an air fixed to the webbing An airbag folding step of folding the bag along the surface on one side of the webbing so that the bag has a size narrower than the width of the webbing; A sewing process in which the cover member is disposed to face the other side surface of the webbing, and an end portion in the short direction of the cover member and an end portion in the short direction of the webbing are sewn. By folding the cover member and the webbing integrated together, the airbag is disposed between the cover member and the webbing, and the short side of the cover member is disposed between the cover member and the webbing. A folding step of arranging a sewing portion between the end portion in the direction and the end portion in the short direction of the webbing.

According to the manufacturing method of the seatbelt apparatus of Claim 1, the thickness of the part in which the airbag was provided is thin by passing through said airbag fixing process, airbag folding process, sewing process, and folding process. And the seatbelt apparatus with the favorable texture of the part in which the airbag was provided can be obtained.

The manufacturing method of the seat belt device according to the present invention has an excellent effect that the thickness of the portion provided with the airbag can be reduced.

It is the front view which looked at the vehicle seat and the seat belt device from the seat front side. It is a top view which shows a seatbelt apparatus single-piece | unit. It is an expanded sectional view which expands and shows the cross section of the seatbelt apparatus cut | disconnected along the 3-3 line shown by FIG. (A)-(D) are process drawings which show the manufacturing process of the seatbelt apparatus shown by FIG.1 and FIG.2, (A) is a top view which shows an airbag fixing process, (B) is air. It is a top view which shows a bag folding process and a sewing process, (C) is sectional drawing which shows the cross sections of webbing etc. which were cut | disconnected along the 4C-4C line shown by (B), (D) is folding | turning back It is sectional drawing which shows a process.

  A seat belt device according to an embodiment of the present invention will be described with reference to FIGS. In the following description, the front / rear / left / right / up / down directions will be described, and the front / rear / left / right / up / down directions viewed from the occupant seated on the vehicle seat will be indicated. The arrow UP indicates the upward direction, the arrow RH indicates the right direction, and the arrow LH indicates the left direction.

  As shown in FIG. 1, the seat belt device 10 of the present embodiment is provided on a separate seat 12 (hereinafter simply referred to as “seat 12”) as a vehicle seat provided in the second row of a so-called minivan type vehicle. It has been. Hereinafter, the schematic configuration of the seat 12 will be described first, and then the configuration of the seat belt device 10 which is a main part of the present embodiment will be described.

(Schematic configuration of the sheet 12)
The seat 12 includes a seat cushion 14 that supports the buttocks and thighs of the occupant P, a seat back 16 that supports the back of the occupant P and is tiltably attached to the rear end of the seat cushion 14, and the occupant P And a headrest 18 that supports the head and is attached to the upper end of the seat back 16.

  The seat cushion 14 is configured by attaching a seat cushion pad covered with a skin material to the seat cushion frame 20, and an upper rail (not shown) is attached to a lower end portion of the seat cushion frame 20. By moving the upper rail along the lower rail provided on the floor of the vehicle body, the seat 12 can be slid in the vehicle longitudinal direction. Further, a buckle 30 that holds the tongue 28 is fixed to the left side of the seat cushion frame 20, and an anchor 32 that supports the end of the webbing 24 is fixed to the right side of the seat cushion frame 20.

  The seat back 16 is configured by attaching a seat back pad covered with a skin material to the seat back frame 22, and winds up a webbing 24 at an upper end portion and a right end portion of the seat back frame 22. A shoulder anchor 27 through which the winding device 26 and the webbing 24 are inserted is fixed.

(Configuration of the seat belt device 10)
As shown in FIGS. 1 and 2, the seat belt device 10 supports a webbing 24, a winding device 26 that winds up the webbing 24, and a tongue 28 and a tongue 28 having insertion holes through which the webbing 24 is inserted. A buckle 30 and an anchor 32 that supports the end of the webbing 24 are provided. As shown in FIGS. 2 and 3, the seat belt device 10 is fixed to the webbing 24 in a state of being disposed between the cover member 60 attached to the webbing 24 and the webbing 24 and the cover member 60. The airbag 34 is provided.

  As shown in FIG. 2, the webbing 24 is formed in a long band shape, and an anchor 32 is fixed to an end portion on one side of the webbing 24. The other end of the webbing 24 is fixed to a spool (not shown) of the winding device 26, and the webbing 24 is accommodated (wound up) in the winding device 26 by rotating the spool. It is like that. In the present embodiment, the portion of the webbing 24 where the airbag 34 and the cover member 60 are fixed is not wound on the spool.

  As shown in FIG. 1, the webbing 24 is pulled out from the winding device 26, and the tongue 28 through which the webbing 24 is inserted is supported by the buckle 30, whereby the webbing 24 is moved between the left side and the right side of the seat 12. Passed between. As a result, the webbing 24 is attached to the body of the occupant P seated on the seat 12. Further, in the event of an emergency of the vehicle (for example, at the time of a collision), the winding device 26 locks the webbing 24 from the spool. The body shape of the occupant P seated on the seat 12 is the same body as the AM50 dummy, and the occupant P is seated in the standard posture on the seat 12 set in the standard use state.

  In a state where the webbing 24 is mounted on the occupant P seated on the seat 12, the webbing 24 is folded back at the insertion portion to the tongue 28. A portion of the webbing 24 between the tongue 28 and the anchor 32 is a lap webbing 24A (lap belt) that supports the waist of the occupant P, and a portion of the webbing 24 between the shoulder anchor 27 and the tongue 28 is The shoulder webbing 24B (shoulder belt) that supports the portion of the occupant P from the waist to the shoulder is used.

  As shown in FIG. 2, the airbag 34 is formed in a rectangular shape whose longitudinal direction is the same as the longitudinal direction of the webbing 24 (see FIG. 2). Further, as shown in FIG. 3, the airbag 34 is disposed so as to face the thickness direction of the webbing 24, and both the first belt-like portion 34 </ b> A and the second belt-like portion 34 </ b> A in which both ends in the short direction of the webbing 24 are joined together. By providing the belt-like portion 34B, the air bag 34 is doubled. When the gas is supplied to the inside of the air bag 34, the air bag 34 is inflated.

  As shown in FIG. 2, the longitudinal dimension of the airbag 34 is such that the lap webbing 24A that supports the waist of the occupant P seated on the seat 12 and the shoulder webbing 24B that supports the portion of the occupant P from the waist to the shoulder. The dimensions correspond to the length. Further, the size of the airbag 34 in the short side direction when inflated and deployed is wider than the width of the webbing 24. A line F shown in the drawing indicates a position where the webbing 24 and the airbag 34 attached to the webbing 24 are folded back by the tongue 28 in a state where the webbing 24 is attached to the occupant P.

  As shown in FIG. 3, an inner tube 52 is inserted into the airbag 34, and the gas generated by the inflator 44 flows preferentially to the shoulder webbing 24 </ b> B through the inner tube 52. Whether or not the inner tube 52 is provided may be set as appropriate in consideration of the inflation characteristics (inflating process) of the airbag 34 and the like.

  An intermediate portion in the short-side direction of the first belt-like portion 34A and the second belt-like portion 34B constituting the airbag 34 is a fixing portion 62 that is fixed to the intermediate portion in the short-side direction of the webbing 24 by sewing. Further, due to the fixing portion 62 to the webbing 24 in the airbag 34, the dimension in the thickness direction and the width direction of the webbing 24 of the inflated airbag 34 becomes a predetermined dimension. In addition, you may comprise so that the dimension of any one of the thickness direction of the webbing 24 of the inflated airbag 34 and the width direction may be controlled.

  The cover member 60 is formed in a band shape thinner than the thickness of the webbing 24, and the cover member 60 extends along the webbing 24. Further, both end portions of the cover member 60 are sewn along the longitudinal direction of the webbing 24 at both end portions in the short direction of the webbing 24. Thereby, a space in which the airbag 34 is disposed is formed between the cover member 60 and the webbing 24. In other words, the airbag 34 is covered with the cover member 60 and the webbing 24. In the present embodiment, the sewing part 64 of the cover member 60 and the webbing 24 and both ends 60A and 24C in the short direction of the cover member 60 and the webbing 24 are connected to the airbag 34 side through the manufacturing process described later. It is supposed to be arranged in.

(Method for manufacturing seat belt device 10)
Next, a method for manufacturing the above-described seat belt device 10 will be described with reference to FIG.

  As shown in FIG. 4A, first, the airbag 34 is fixed to one surface of the webbing 24, that is, the surface on the passenger P side (airbag fixing step).

  Next, as shown in FIGS. 4B and 4C, the airbag 34 fixed to the webbing 24 is folded so as to have a size narrower than the width of the webbing 24 (airbag folding step). In order to maintain the shape of the folded airbag 34, an adhesive or the like may be applied to a predetermined portion of the airbag 34 in this step.

  Next, both end portions in the short direction of the cover member 60 and both end portions in the short direction of the webbing 24 are sewn in a state where the cover member 60 is disposed to face the other surface of the webbing 24 (sewing step). Thereby, the cover member 60 and the webbing 24 are integrated.

  Next, as shown in FIG. 4D, the cover member 60 and the webbing 24 that are integrated through the sewing process are folded back (folding process). By passing through the process, the airbag 34 is disposed between the cover member 60 and the webbing 24.

  After passing through the above steps, the seat belt device 10 is manufactured through a step of attaching the winding device 26, the tongue 28, and the anchor 32 (see FIG. 2) to the webbing 24.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 1, when gas is supplied into the airbag 34 in a state where the webbing 24 is attached to the occupant P, the airbag 34 is inflated. Then, after the airbag 34 breaks the sewing portion 64 (see FIG. 3) between the cover member 60 and the webbing 24, the airbag 34 is inflated and deployed between the webbing 24 and the occupant P.

  Here, as shown in FIG. 3, the seat belt device 10 according to the present embodiment sews both ends of the cover member 60 in the short direction and both ends of the webbing 24 in the short direction. A space in which the airbag 34 is disposed is formed between the webbing 24 and the webbing 24. In other words, the webbing 24 functions as a part of the cover member 60 that covers the airbag 34 before being inflated and deployed. By setting it as the said structure, the thickness of the site | part in which the airbag 34 in the seatbelt apparatus 10 was provided can be made thin.

  In addition, in the present embodiment, by using the cover member 60 that is thinner than the thickness of the webbing 24, the thickness of the portion of the seat belt device 10 where the airbag 34 is provided can be further reduced. .

  In the seat belt device 10 of the present embodiment, the dimension in the thickness direction and the width direction of the webbing 24 of the inflated airbag 34 is set to a predetermined dimension by the fixing part 62 to the webbing 24 in the airbag 34. It has become. With this configuration, the airbag 34 that is inflated and deployed can be set to a desired dimension without providing a tether or the like in the airbag 34.

  Furthermore, in this embodiment, the sewing part 64 of the cover member 60 and the webbing 24, and both ends 60A and 24C in the short direction of the cover member 60 and the webbing 24 are arranged on the airbag 34 side. . That is, the sewing part 64 of the cover member 60 and the webbing 24 and both ends 60A and 24C in the short direction of the cover member 60 and the webbing 24 are arranged at positions where the passenger P side does not touch. Thereby, the passenger | crew P can improve the texture at the time of touching the part in which the airbag 34 in the seatbelt apparatus 10 was provided. Further, this texture can be realized through the above-described airbag fixing process, airbag folding process, sewing process, and folding process.

  Further, in the present embodiment, since the airbag 34 is arranged between the occupant P and the webbing 24, the internal pressure of the airbag 34 can be effectively utilized for restraining the occupant P.

  Furthermore, in the present embodiment, since the airbag 34 is fixedly sewn to the webbing 24, the airbag 34 is webbed, for example, when the load is input from the occupant P to the airbag 34, and so on. It is possible to suppress the displacement with respect to 24. Thereby, the restraint performance of the passenger | crew P can be improved.

  Further, in the present embodiment, the portion of the webbing 24 where the airbag 34 and the cover member 60 are fixed is configured not to be wound around the spool, so that the winding device 26 can be reduced in size. it can.

  In the present embodiment, the sewing part 64 between the cover member 60 and the webbing 24 and both ends 60A and 24C in the short direction of the cover member 60 and the webbing 24 are arranged on the airbag 34 side. However, the present invention is not limited to this, and the sewing portion 64 of the cover member 60 and the webbing 24 and both ends 60A and 24C in the short direction of the cover member 60 and the webbing 24 are opposite to the airbag 34. It can also be arranged on the side. The seat belt device 10 is required to determine whether the sewing portion 64 of the cover member 60 and the webbing 24 and both ends 60A and 24C of the cover member 60 and the webbing 24 in the short direction are arranged on the airbag 34 side. What is necessary is just to set suitably in consideration of the texture etc.

  In the present embodiment, the example in which the dimension in the thickness direction of the webbing 24 of the inflated and deployed airbag 34 becomes a predetermined dimension by the fixing part 62 to the webbing 24 in the airbag 34 has been described. However, the present invention is not limited to this. Whether the size of the airbag 34 inflated and deployed in the thickness direction of the airbag 34 is restricted by the fixing portion 62 of the airbag 34 to the webbing 24 is determined in consideration of the shape of the airbag during inflation and deployment. What is necessary is just to set suitably.

  Further, in the present embodiment, both ends of the cover member 60 are sewn along the longitudinal direction of the webbing 24 at both ends in the short direction of the webbing 24, so that the airbag is interposed between the cover member 60 and the webbing 24. Although the example which formed the space where 34 is arrange | positioned has been demonstrated, this invention is not limited to this. For example, a band-shaped member having a webbing part that constitutes the webbing 34 and a cover part that is formed integrally with the webbing part and that constitutes the cover member 60 is folded at the boundary between the webbing part and the cover part. Then, a space in which the airbag 34 is disposed can be formed between the webbing part and the cover part by sewing the end part of the webbing part and the end part of the cover part.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

10 Seat belt device
12 Separate seat (vehicle seat)
24 Webbing
34 Airbag
60 Cover member
62 Fixed part
64 Sewing part
P Crew

Claims (1)

A webbing to be worn by an occupant seated in a vehicle seat;
An airbag that is fixed to the webbing and inflated and deployed between the webbing and the occupant by supplying gas therein;
A cover member that extends along the webbing and forms a space in which the airbag is disposed between the webbing by sewing an end in a short direction;
Applied to a method of manufacturing a seat belt device of a seat belt device comprising:
An airbag fixing step of sewing and fixing the airbag to one surface of the webbing;
An airbag folding step of folding the airbag fixed to the webbing along a surface on one side of the webbing so as to have a size smaller than the width of the webbing;
A sewing process in which the cover member is disposed to face the other side surface of the webbing, and the short end of the cover member and the short end of the webbing are sewn;
By folding the cover member and the webbing integrated by sewing, the airbag is disposed between the cover member and the webbing, and the cover member is disposed between the cover member and the webbing. A folding step of arranging a sewing portion between an end in the short direction and an end in the short direction of the webbing;
A method of manufacturing a seat belt device having

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