JP2018069863A - Webbing for seatbelt and seatbelt device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a webbing for a seatbelt which secures safety by alleviating a chest trouble value of an occupant at a collision or the like, and a seatbelt device having the same.SOLUTION: A webbing 100 for a seatbelt of a vehicle comprises a bag-shaped part 1, and a low-elongation material 2 which is interposed in the bag-shaped part 1, and low in elongation compared with that of the bag-shaped part 1. A position from at least an anchor up to an intermediate part between a tongue plate fixed to a buckle and a slip joint forms the bag-shaped part 1, one end part 2a of the low-elongation material 2 is sewed to the bag-shaped part 1 in a position approximate to the anchor 3, and the other end part 2b is an open end between the tongue plate and the slip joint. It is preferable that the elongation of the bag-shaped part 1 and the elongation of a single fabric which are measured by JIS D 4604 are 8 to 20%, and the elongation of the low-elongation material 2 is 2 to 10%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seat belt webbing and a seat belt device including the same. More specifically, the present invention can reduce an occupant's chest damage value at the time of a collision and the like, and prevents the occupant from moving forward between the seat and the webbing. The present invention relates to a seatbelt webbing for which safety is ensured, and a seatbelt device including the same.

  2. Description of the Related Art Conventionally, a seat belt is known as a device that reduces impact during a collision and protects passengers of vehicles such as automobiles and aircraft. For example, an automobile seat belt device is known in which a seat material having a dilatant characteristic is disposed on a chestbing of a shoulder belt seated occupant or a webbing portion corresponding to the chest and abdomen (see, for example, Patent Document 1). In this device, since the sheet material is soft when no impact load is applied, the mounting feel is improved, and when the impact load acts on the sheet material, the sheet material is instantly cured and the impact energy is absorbed. Has been explained.

JP 2012-136169 A

  In a vehicle seat belt, various belts such as a belt that absorbs and dissipates impact energy by a specific sheet material arranged at a required portion of a shoulder belt, such as the belt described in Patent Document 1 described above. Proposed. Recently, in order to improve the initial restraint of the seat belt, a seat belt including a pretensioner designed to forcibly wind up the webbing at the moment when an impact is applied has been developed. Furthermore, because the pretensioner action tends to increase the load on the occupant, particularly on the chest, a seat belt is also developed that includes a force limiter for reducing the load on the chest after the pretensioner is activated. . Thus, although the safety of the vehicle seat belt is further enhanced, further improvement and development are desired.

  The present invention has been made in view of the above-described state of the art, and can reduce the chest damage value of an occupant due to an impact at the time of a collision and the like, and the occupant can rub through between the seat and the webbing and move forward. It is an object of the present invention to provide a seat belt webbing that is prevented from moving to a seat belt and a seat belt device including the same.

The present invention is as follows.
1. Vehicle seat belt webbing,
A bag-shaped portion, and a low elongation material interposed in the bag-shaped portion and having a low elongation compared to the bag-shaped portion,
When the seat belt is mounted, at least the position from the anchor to the intermediate portion between the tongue plate fixed to the buckle and the slip joint is the bag-shaped portion,
One end portion of the low elongation material is sewn to the bag-like portion at a position close to the anchor, and the other end portion is an open end between the tongue plate and the slip joint. A webbing for seat belts.
2. The other parts excluding the bag-shaped part are made of a single woven fabric, and the elongation of the low elongation material is lower than that of the single woven fabric. Webbing for seat belts as described in 1.
3. 2. The elongation of the bag-like portion and the elongation of the single woven fabric measured by JIS D 4604 are 8 to 20%, and the elongation of the low elongation material is 2 to 10%. Webbing for seat belts as described in 1.
4). 2. The bag-shaped portion is a bag-woven portion, and the bag-woven portion and the single woven fabric are continuously woven. Or 3. Webbing for seat belts as described in 1.
5. 1 above. To 4. A seatbelt device comprising the seatbelt webbing according to any one of the above.

In the seatbelt webbing of the present invention, when the seatbelt is mounted, at least the position from the anchor to the intermediate portion between the tongue plate locked to the buckle and the slip joint is a bag-like portion. And inside the bag-like part, a low elongation material having a lower elongation than the bag-like part is interposed between the position close to the anchor and the intermediate part between the tongue plate and the slip joint. Yes. Further, one end portion of the low elongation material on the side close to the anchor is sewn to the bag-like portion, and the other end portion is not fixed to the bag-like portion but is an open end. Thereby, at the time of a collision etc., a passenger | crew's chest fault value can be reduced by the bag-like part with relatively large elongation and high energy absorption. On the other hand, the waist restraint is high between the anchor and the tongue plate in which the low elongation material having a relatively small elongation is interposed, and the occupant moves through the space between the seat and the webbing and moves forward. And the safety of passengers is ensured. Furthermore, the other end of the low-stretch material is located at the intermediate portion between the tongue plate and the slip joint, and the low-stretch material does not pass through the slip joint. There is no hindrance. Moreover, since the low elongation material is interposed in the bag-like portion, the appearance of the webbing is not impaired.
Furthermore, when the other parts except the bag-shaped part are made of a single woven fabric and the elongation of the low-stretch material is lower than that of the single-woven fabric, the other end of the low-stretch material is fixed to the bag-shaped part. As in the case of the non-applied configuration, the occupant's chest damage value can be reduced, and the occupant can be prevented from moving forward by rubbing between the seat and the webbing, thereby ensuring the safety of the occupant. The
Further, when the elongation of the bag-like portion and the elongation of the single woven fabric measured by JIS D 4604 is 8 to 20%, and the elongation of the low elongation material is 2 to 10%, the chest damage value of the occupant Can be sufficiently reduced, and the occupant is sufficiently prevented from moving forward from the seat, thereby ensuring the safety of the occupant.
Further, when the bag-shaped portion is a bag-woven portion and the bag-woven portion and the single woven fabric are continuously woven, the webbing is easy to manufacture, and the appearance is prevented from being deteriorated, so that the webbing looks good. be able to.
Since the seat belt device of the present invention includes the seat belt webbing of the present invention, the occupant's chest obstacle value is reduced by the bag-shaped portion or the bag-shaped portion and the single woven fabric at the time of a collision, and the like. Between the anchor and the tongue plate in which the low elongation material is interposed, the waist is sufficiently restrained, the occupant is prevented from moving forward from the seat, and the safety of the occupant is ensured.

It is a typical explanatory view of a seat belt webbing that is a bag-like portion over its entire length and in which a low elongation material is interposed from the anchor side to a predetermined position. From the anchor side to a predetermined position is a bag-like portion in which a low elongation material is interposed, and the other portion is a schematic explanatory diagram of a seat belt webbing made of a single woven fabric. It is a typical perspective view of an example of a seatbelt device provided with webbing for seatbelts of the present invention, and a vehicular seat. It is a typical front view showing the position of the other end part of a low elongation material when a big crew member sits on a seat. It is a typical front view showing the position of the other end part of a low elongation material when a small crew member sits on a seat.

Hereinafter, the present invention will be described in detail with reference to the drawings.
The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

[1] Seatbelt Webbing The seatbelt webbing 100 of the present invention includes a bag-shaped portion 1 and a low-tensile material 2 interposed in the bag-shaped portion and having a lower elongation than the bag-shaped portion 1. Provide (see FIGS. 1 and 2). Further, when the seat belt is mounted, at least the position from the anchor 3 to the intermediate portion between the tongue plate 5 and the slip joint 6 locked to the buckle 4 is the bag-like portion 1 [see FIG. 1 (2) means that the low elongation material 2 is interposed in the bag-like portion]. Furthermore, one end 2 a of the low elongation material 2 is sewn to the bag-like portion 1 at a position close to the anchor 3, and the other end 2 b is an open end between the tongue plate 5 and the slip joint 9. (See FIGS. 1 and 2).

  The seat belt webbing 100 needs to restrain the occupant at the time of a collision or the like. However, if the chest is restrained excessively, the chest obstacle value increases, and therefore it is preferable to have an appropriate degree of elongation. On the other hand, if the restraint of the waist is insufficient, the occupant may scrub between the seat and the webbing 100 and move forward, so that the elongation is higher than the part corresponding to the chest of the webbing 100. Preferably it is low. Therefore, in the webbing 100 of the present invention, the low elongation material 2 is interposed in the bag-like portion at the site corresponding to the waist.

  The low elongation material 2 is sewn to the bag-like part 1 at a position where one end 2a is close to the anchor 3 and fixed to the bag-like part 1 (see FIGS. 1 and 2), and the other end 2b. Is an open end between the tongue plate 5 locked to the buckle 4 and the slip joint 6 (see FIGS. 1 and 2). In addition, when the seat belt is worn, the low elongation material 2 has a physique and body shape of the occupant between the bag-like portion 1 and the position close to the anchor 3 and the tongue plate 5 locked to the buckle 4. It is fixed at a predetermined length. Since the length of the webbing 100 is not excessively extended between the anchor 3 and the tongue plate 5 at the time of a collision or the like, the occupant's waist can be reliably restrained.

  On the other hand, the other end 2b of the low elongation material 2 is an open end between the tongue plate 5 and the slip joint 6 locked to the buckle 4. Even if the elongation material 2 is interposed, the webbing 100 is not affected by the low elongation material 2 between the tongue plate 5 and the slip joint 6 locked to the buckle 4. Therefore, it stretches moderately based on the elongation of the bag-like portion 1 having a higher elongation than the low elongation material 2. Therefore, the chest is not restrained excessively, and the chest damage value can be reduced.

  The webbing 100 may be formed by the bag-like portion 1 over its entire length (see FIG. 1), but the other portion excluding the bag-like portion 1 may be formed of a single woven fabric 8 (see FIG. 1). 2). In this case, the elongation of the single woven fabric 8 is higher than the elongation of the low elongation material 2. Accordingly, as in the case where the webbing 100 is the bag-like portion 1 over its entire length, the chest is not restrained excessively strongly, and the chest damage value can be reduced.

  When the seat belt is worn, the single woven fabric 8 can extend from the webbing 100 between the tongue plate 5 locked to the buckle 4 and the slip joint 6 to the end fixed to the retractor 6. In this case, the webbing 100 may be a single woven fabric 8 from the position close to the tongue plate 5 to the end fixed to the retractor 6, and the end fixed to the retractor 6 from a position closer to the slip joint 6 side. The single woven fabric 8 may be used up to the portion.

  The elongation of the low elongation material 2 may be lower than the elongation of the bag-like portion 1 and the single woven fabric 8, but in order to sufficiently achieve each action effect due to the difference in elongation, JIS The elongation of the bag-like portion 1 and the elongation of the single woven fabric 8 measured by D 4604 are preferably 8 to 20%. Moreover, it is preferable that the elongation of the low elongation material 2 is 2 to 10%. Furthermore, it is more preferable that the elongation of the bag-like portion 1 and the elongation of the single woven fabric 8 is 9 to 18%, and the elongation of the low elongation material 2 is 3 to 8%. Further, it is particularly preferable that the elongation of the bag-like portion 1 and the elongation of the single woven fabric 8 is 10 to 16%, and the elongation of the low elongation material 2 is 3.5 to 7.5%. Further, the elongation of the bag-like portion 1 and the elongation of the single woven fabric 8 may be substantially the same or different, but need not be particularly different.

  When the seat belt is worn, at least from the anchor 3 to the tongue plate 5, the low-stretch material 2 needs to be interposed in the webbing 100, but the length varies depending on the physique, body shape, etc. of the occupant . For example, when the passenger is a large occupant as shown in FIG. 4, the distance from the anchor 3 to the tongue plate 5 is long. When the occupant is a small occupant as shown in FIG. 5, from the anchor 3 to the tongue plate 5. [1 to 2 in FIGS. 4 and 5 means that the low elongation material 2 is interposed in the bag-like portion]. The length between the anchor 3 and the tongue plate 5 needs to be set assuming a very large occupant.

  Therefore, as shown in FIG. 4, if the occupant is large, the distal end portion of the low elongation material 2 interposed in the bag-like portion is positioned closer to the tongue plate 5. On the other hand, as shown in FIG. 5, if the occupant is small, the tip portion of the low elongation material 2 interposed in the bag-like portion is located closer to the slip joint 6 side. Thus, even if the other end 2b of the interposed low elongation material 2 is positioned closer to the chest of the occupant, the other end 2b is an open end, so that the chest is excessively restrained. There is no reduction in chest damage.

  The other end 2b of the low elongation material 2 may be sewn to the bag-like portion 1 when the other end 2b is in a position close to the tongue plate 5 when the seat belt is worn. In this case, the webbing 100 has a sufficiently long bag-like portion 1 or a bag-like portion 1 and a single woven fabric from the position where the other end 2b of the low elongation material 2 is sewn to the end fixed to the retractor 9. 8, the chest is excessively restrained, and the chest disorder value does not increase. For example, the total length of the bag-like part 1 or the bag-like part 1 and the single woven fabric 8 from the position where the other end 2b of the low elongation material 2 of the webbing 100 is sewn to the end fixed to the retractor 9 Is 70% or more of the length to the end fixed to the tongue plate 5 and the retractor 9, particularly 80% or more (100% may be sufficient), the chest is excessively restrained, and the chest damage value is large. Never become.

  The bag-like portion 1 may be formed by bag weaving or may be formed by overlapping two single woven fabrics and sewing the side end portions thereof, but is preferably formed by bag weaving. Moreover, the single woven fabric 8 is a general woven fabric, and the woven structure may be a twill woven fabric, a plain woven fabric or the like, and is not particularly limited. The bag-like portion 1 and the single woven fabric 8 may be continuously woven, and the end portions in the length direction of the respective woven fabrics may be integrated by sewing or the like. Preferably it is. If the bag-like portion 1 and the single woven fabric 8 are continuously woven, the webbing 100 can be easily manufactured, and the uncomfortable feeling due to the difference in the woven structure at the boundary portion is reduced, and the appearance is not impaired. Therefore, the webbing 100 having good appearance can be obtained.

  In the production of the seat belt webbing 100 of the present invention, a filament made of a synthetic resin is used. As this filament, there are a multifilament and a monofilament, and usually a multifilament is used. The material of the filament is not particularly limited, and filaments made of various synthetic resins can be used.

  The synthetic resin is not particularly limited. For example, polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, polytrimethylene terephthalate, polyamide resins such as nylon 6 and nylon 66, polyacrylic resins, high density polyethylene, Examples thereof include polyolefin resins such as polypropylene. As the synthetic resin, a polyester resin and a polyamide resin are particularly preferable, and a polyester resin such as PET having excellent tensile strength is more preferable.

  The fineness of the synthetic resin filament such as a multifilament is not particularly limited, and a multifilament having an appropriate fineness can be used. The fineness is preferably 500 to 3000 dtex for the warp and 250 to 1500 dtex for the weft, and more preferably 1500 to 1800 dtex for the warp. If it is such a fineness, especially if the fineness of the warp is 1500-1800 dtex, it is preferable because it has sufficient strength as a webbing for seat belts. In the case of a multifilament, the number of filaments constituting the multifilament is not particularly limited, and can be set according to the fineness and the like. In the case of warp, it is 50 to 300, particularly 100 to 200. preferable.

  Further, the material, shape and the like of the low elongation material 2 are not particularly limited as long as there is no problem in the flexibility, appearance, and feel given to the occupant as the webbing 100. As a material, various synthetic resins used for manufacturing the webbing 100 can be used, and a woven fabric such as a twill weave or a plain weave may be used, or a molded body such as a film may be used. As for the shape, the appearance of the webbing 100 is not impaired, and it is not necessary to give an uncomfortable feeling to the occupant, and a flat woven fabric, film, or the like is preferable.

[2] Seat belt device The seat belt device 200 of the present invention is characterized by using the seat belt webbing 100 of the present invention.
Specifically, as shown in FIG. 3, the webbing 100 and various other members are provided, and are arranged on the periphery of the seat having the seat cushion 10 a and the seat back 10 b. Other members are attached to the lower part of the pillar of the body panel and attached to the retractor 9, floor panel or seat panel to which one end of the webbing 100 is fixed, and the other end of the webbing 100 is fixed. Anchor 3 etc. are mentioned. Further, the webbing 100 raised from the retractor 9 is led out downward from a slip joint 6 fixed to the occupant's side upper part, and passes through a tongue plate 5 locked to the buckle 4 to the other end. Is fixed to the anchor 3.

  The webbing 100 is inserted through the tongue plate 5 so as to be movable in the length direction. When the occupant wears the seat belt, the tongue plate 5 is locked to the buckle 4 attached to the floor panel or the seat panel, Fixed. In this case, the shoulder and the chest are restrained between the slip joint 6 and the tongue plate 5 of the webbing 100, and the waist is restrained between the tongue plate 5 and the anchor 3. In this way, the waist can be restrained between the anchor 3 and the tongue plate 5, but the length varies depending on the physique, body shape, etc. of the occupant. Therefore, at least from the anchor 3 to the tongue plate 5, it is necessary that the low elongation material 2 is interposed in the bag-like portion 1.

  Further, the waist is restrained between the anchor 3 and the tongue plate 5, but when an impact such as a collision is applied, the webbing 100 held by the tongue plate 5 slips and the webbing 100 moves toward the abdomen of the occupant. It may move somewhat, and the restraining force of the waist may be reduced. On the other hand, there is also a seat belt device 200 including a locking tongue having a function of fixing the webbing 100 on the tongue plate 5, and in this case, the movement of the webbing 100 due to sliding is suppressed, and the reduction of the restraining force of the waist is suppressed. Thus, in the case of the seat belt device 200 including the locking tongue, the action of the present invention due to the form in which the low elongation material 2 is interposed in the bag-like portion 1 is more effectively expressed.

  Further, the webbing 100 has a total length from one end portion fixed to the retractor 9 attached to the lower part of the pillar of the body panel to the other end portion fixed to the anchor 3 attached to the floor panel or the seat panel. However, it is about 3500 mm, for example. The webbing 100 has a shoulder and a chest restrained by a slip joint 6 fixed to the occupant's upper side of the webbing 100 and a tongue plate 5 locked to the buckle 4. The waist can be restrained by the plate 5 to the anchor 3 (see FIGS. 4 and 5).

  However, depending on the physique and body shape of the occupant, the respective lengths will differ. Therefore, in the webbing 100 of the present invention, the length from the anchor 3 to the tongue plate 5 can be 15 to 25%, particularly 18 to 23% of the total length of the webbing 100. When this length is calculated by assuming that the total length of the webbing 1 is 3500 mm, it becomes 525 to 875 mm, particularly 630 to 805 mm, and the length of the belt portion with relatively low elongation from the anchor 3 to the tongue plate 5 is in the above numerical range. In particular, if the length is about 700 mm, the webbing 100 that can sufficiently restrain the occupant's lower back and restrain the forward movement can be obtained at the time of a collision, regardless of the physique and body shape of the occupant. Further, the belt portion having a relatively high elongation from the tongue plate 5 to the retractor 9 also has an appropriate length, and the chest damage value can be reduced.

  Further, since the seat is normally adjustable in the front-rear direction, the lengths of the belt portion that restrains the shoulder and the chest and the belt portion that restrains the waist also differ depending on the position of the seat. However, the length of the belt portion that restrains the waist portion can be the above-described length, and the belt portion that restrains the shoulder and the chest portion can also be an appropriate length. There is also a type in which the anchor 3 and the retractor 9 are incorporated in the seat. In this case, the length of the belt portion that restrains the waist and the belt portion that restrains the shoulder and chest is affected by the physique and body shape of the occupant. However, it is not affected by the position of the seat in the front-rear direction.

  However, the length of the belt portion that restrains the waist portion with the anchor 3 as a base point is slightly different from that when the anchor 3 is attached to the floor panel or the seat panel. Furthermore, the length of the belt portion that restrains the shoulder and chest between the tongue plate 5 and the retractor 9 is also slightly different from when the retractor 9 is attached to the floor panel or the seat panel. However, since all of these dimensional changes are slight, in this case as well, the belt part that restrains the waist can be the above-mentioned length, and the belt part that restrains the shoulder and the chest part can also be an appropriate length. it can.

  It should be noted that the above examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, changes may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope.

  The present invention is a device for protecting an occupant by mitigating an impact at the time of a collision of a vehicle such as an automobile.In particular, since the chest impact value of the occupant is reduced and the waist restraint is high, the occupant is provided with a seat and a webbing. It can be used in the technical field in order to prevent the vehicle from moving forward through the gap and ensuring the safety of the occupant.

  100; seat belt webbing; 1; bag-like part; 2; low elongation material; 2a; one end part; 2b; other end part; Sewn part, 8; single woven fabric, 9; retractor, 200; seat belt device, A; large passenger, B; small passenger.

Claims (5)

Vehicle seat belt webbing,
A bag-shaped portion, and a low elongation material interposed in the bag-shaped portion and having a low elongation compared to the bag-shaped portion,
When the seat belt is mounted, at least the position from the anchor to the intermediate portion between the tongue plate fixed to the buckle and the slip joint is the bag-shaped portion,
One end portion of the low elongation material is sewn to the bag-like portion at a position close to the anchor, and the other end portion is an open end between the tongue plate and the slip joint. A webbing for seat belts.   The webbing for a seat belt according to claim 1, wherein the other part excluding the bag-like part is made of a single woven fabric, and the elongation of the low elongation material is lower than the elongation of the single woven fabric.   The sheet according to claim 2, wherein the elongation of the bag-like portion and the elongation of the single woven fabric measured by JIS D 4604 is 8 to 20%, and the elongation of the low elongation material is 2 to 10%. Belt webbing.   The seatbelt webbing according to claim 2 or 3, wherein the bag-shaped portion is a bag-woven portion, and the bag-woven portion and the single woven fabric are continuously woven.   A seat belt apparatus comprising the seat belt webbing according to any one of claims 1 to 4.

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