JP2014223841A - Seat belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt device of which a width of a shoulder belt is widened approximately twice a webbing on a retractor side and a waist belt webbing so as to reduce impact applied on an occupant from a shoulder to a chest.SOLUTION: A seat belt device includes a seat belt webbing 3, and a through anchor 7 having an insertion hole for inserting the seat belt webbing. One group of elements 11 of a fastener 9 is attached to one end side of the seat belt webbing 3 in a width direction. The other group of elements 13 of the fastener 9 is attached to the other end side. A slider 17 for engaging or separating the one group of elements 11 and the other group of elements 13 is attached to an inner circumference surface of the insertion hole of the through anchor 7. A width of the seat belt webbing 3 is widened by separating the one and other groups of elements 11, 13 on a tongue plate side from the through anchor 7, and is narrowed by engaging the one and other groups of elements 11, 13 on a retractor side.

Description

  The present invention relates to a seat belt device. More specifically, the present invention relates to a seat belt device in which the width of a shoulder belt for restraining the chest from the occupant's shoulder is widened, and the impact applied to the occupant during a collision or the like is further alleviated.

  2. Description of the Related Art Conventionally, a seat belt is known as a device for restraining a passenger of a vehicle such as an automobile or an aircraft to a seat at the time of a collision. For example, in a three-point seat belt, a webbing is inserted into a through anchor attached to the upper part of the center pillar, a tongue plate is locked to a buckle, and the webbing is stretched from the shoulder of the occupant to the chest. In this case, the webbing is inserted through the through-hole of the through anchor at the time of pulling out and rewinding, and the through-hole of the through anchor is slightly wider than the width of the webbing. Accordingly, the webbing can be easily inserted, and excessive swinging of the webbing in the lateral direction in the insertion hole is suppressed.

  Because of the above-described configuration, in order to widen the webbing and further reduce the load applied to the occupant during a collision or the like, it is necessary to enlarge the through anchor and widen the insertion hole in the lateral direction. However, when the through anchor is enlarged and the webbing is widened, it is necessary to widen the retractor and the tongue plate, and many design changes are required for the entire seat belt device.

  As a seat belt including a wide shoulder belt, a seat belt arrangement structure including a guide member that narrows the seat belt in a width direction is known at a portion that does not need to be wide (for example, Patent Documents). 1).

JP 2012-240432 A

  In the seat belt arrangement structure described in Patent Document 1 described above, the seat belt is folded in a substantially double state at a portion that does not need to be wide. Accordingly, the width of the seat belt when stored is approximately halved. However, this guide member has a considerably complicated structure.

  The present invention has been made in view of the above situation, and the width of the shoulder belt for restraining the chest from the shoulder of the occupant is widened. Thereby, it aims at providing the seatbelt apparatus by which the impact added to a passenger | crew is relieve | moderated more.

The present invention is as follows.
1. Seat belt webbing,
A through-anchor having an insertion hole through which the seat belt webbing is inserted, and a seat belt device comprising:
One element group of the fastener is attached to one end side in the width direction of the seat belt webbing, and the other element group of the fastener is attached to the other end side,
In the through anchor, a slider for engaging or separating the one element group and the other element group is attached to the inner peripheral surface of the insertion hole,
In the seat belt webbing, the one element group and the other element group are separated on the tongue plate side from the through anchor,
In the seat belt webbing, the one element group and the other element group are engaged with each other on the retractor side of the through anchor.
2. The slider is attached to a surface of the inner peripheral surface of the insertion hole that is not subjected to a load due to pressing of the seat belt webbing when the seat belt webbing is pulled out. A seat belt device according to claim 1.
3. The slider is rotatably attached to the through anchor so that a relative orientation with respect to the through anchor can be changed. Or 2. A seat belt device according to claim 1.

In the seat belt device according to the first aspect, the element groups of the fasteners attached to both ends in the width direction of the seat belt webbing are engaged or separated by the slider attached to the inner peripheral surface of the through hole of the through anchor. Then, the element group is separated on the tongue plate side from the through anchor, and the webbing becomes wide.
With such a configuration, the load applied to the chest from the occupant's shoulder during a collision or the like is further reduced. On the other hand, the element group is engaged on the retractor side with respect to the through anchor, and becomes narrower. Thus, it is possible to obtain a wide shoulder belt without the need to change the design of the tongue plate, the buckle, and the retractor.
In the airbag device according to the second aspect, the slider is attached to a surface of the inner peripheral surface of the insertion hole that is not subjected to a load due to pressing of the seat belt webbing when the seat belt webbing is pulled out.
With such a configuration, when an occupant pulls down the webbing downward at the time of wearing, the load due to the pressing of the webbing applied to the inner peripheral surface of the through-hole of the through anchor is reduced. Thereby, the engaged element group can be easily separated and the webbing can be widened. On the other hand, when rewinding, the separated element groups can be easily engaged, and winding by the retractor is easy.
In the seat belt device according to the third aspect, the slider is rotatably attached to the through anchor so that the relative direction to the through anchor can be changed.
With this structure, even when the webbing is not pulled out in a direction that is substantially perpendicular to the insertion hole of the slider, the direction of the slider changes following the direction in which the webbing is pulled out, so that the webbing is smooth. Can be pulled out.

In the following, non-limiting examples of exemplary embodiments according to the present invention will be given and described in detail with reference to the mentioned drawings, wherein like reference numerals refer to several views of the drawings. It shows that it is the same part through.
It is typical explanatory drawing of the whole seatbelt apparatus. It is explanatory drawing which shows a mode that the passenger | crew is using the seatbelt apparatus of FIG. It is a front view of a through anchor. It is explanatory drawing which shows a mode that the seatbelt webbing is penetrated by the penetration hole in the AA 'cross section of FIG. It is a front view of the through anchor with which the slider which can be rotated was attached to the internal peripheral surface of an insertion hole. It is AA 'sectional drawing of the through anchor of FIG. It is a front view of the through anchor with which the slider which can be rotated to a three-dimensional direction was attached to the internal peripheral surface of an insertion hole. It is AA 'sectional drawing of the through anchor of FIG. It is a top view for demonstrating the bending part of seatbelt webbing.

  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.

  The seat belt device (1) (see FIG. 1) according to the first embodiment includes a seat belt webbing (3) [hereinafter referred to as webbing (3). And a through anchor (7) having an insertion hole (5) through which the webbing (3) is inserted. Also, one element group (11) of the fastener (9) is attached to one end side in the width direction of the webbing (3), and the other element group (13) of the fastener (9) is attached to the other end side. (See FIGS. 1, 2, 4, and 9). Further, the through anchor (7) is provided with a slider (one for separating or engaging one element group (11) and the other element group (13) on the inner peripheral surface (15) of the insertion hole (5). 17) is attached (see FIGS. 3 to 8).

  In the seat belt device (1) according to the first embodiment, the webbing (3) is pulled out from the retractor (19) attached to the lower part of the pillar of the body panel. That is, a retractor (19) is disposed at one end of the webbing (3). The webbing (3) is inserted through the insertion hole (5) of the through anchor (7), and the other end is attached to the anchor (21) disposed at the lower part of the body panel. Further, a tongue plate (23) is inserted into the webbing (3), and the tongue plate (23) is detachably engaged with a buckle (27) attached to the vehicle seat (25). (See FIG. 1).

  The seat belt device (1) according to the first embodiment has the above-described configuration, and the webbing (3) is connected to one element group (11) on the tongue plate (23) side from the through anchor (7). The other element group (13) is separated. In the webbing (3), one element group (11) and the other element group (13) are engaged with each other on the retractor (19) side from the through anchor (7) (see FIGS. 1 and 2). That is, the webbing (3) becomes a wide shoulder belt (29) on the tongue plate (23) side from the through anchor (7). On the other hand, the width is narrower on the retractor (19) side and is approximately half the width on the tongue plate (23) side (see FIGS. 1 and 2).

  The length of the webbing (3) in the seat belt device (1) according to the first embodiment is not particularly limited. Usually, it is 2000-4000 mm, preferably 3000-3700 mm. A length within this range is suitable for easy winding onto the retractor (19). Further, the width of the webbing (3) is 94 to 108 mm, preferably 98 to 104 mm on the tongue plate (23) side from the wide through anchor (7). If it is the width | variety of this range, a seatbelt can be comfortably fastened without giving discomfort to a passenger | crew (31). Moreover, it can be set as the shoulder belt (29) which fully reduces the load added to a chest from a passenger | crew's (31) shoulder at the time of a collision.

  The range in which the fastener (9) is attached to the entire length of the webbing (3) is inserted into the insertion hole (5) of the through anchor (7) when the occupant (31) wears the webbing (3). The position may be from the position on the shoulder belt (29) side to the position on the shoulder belt (29) side from the tongue plate (23) engaged with the buckle (27). That is, the fastener (9) should just be attached to the range used as the shoulder belt (29) which restrains a chest from a passenger | crew's (31) shoulder at least.

  In addition, although the fastener (9) may be attached to the retractor (19) side from the location penetrated by the insertion hole (5) of a through anchor (7), it is not necessary to attach in particular. Further, the fastener (9) is not attached to the range of the webbing (3) which becomes the waist belt (35). In the range that becomes the waist belt (35), the webbing (3) is bent from each of both side ends toward the center, and the end surfaces are butted together and stitched.

  A slider (17) is attached to the inner peripheral surface (15) of the insertion hole (5) of the through anchor (7). The slider (17) separates and engages one element group (11) and the other element group (13) of the fastener (9). The position where the slider (17) is attached in the inner peripheral surface (15) of the insertion hole (5) is not particularly limited. The slider (17) is attached to the surface of the inner peripheral surface (15) of the insertion hole (5) where the load due to the pressing of the webbing (3) is not applied when the webbing (3) is pulled out. Is preferred. Furthermore, it is more preferable to attach to the substantially center part of the width direction of the surface where the load by the pressing of the webbing (3) of the insertion hole (5) is not applied. Thereby, webbing (3) can be pulled out easily and winding by a retractor (19) is also easy.

  The fiber used for manufacture of webbing (3) is not specifically limited, A well-known fiber can be used widely. Preferably, a filament made of a synthetic resin is used as the fiber. As the filament, there are a multifilament and a monofilament, but it is usually preferable to use a multifilament. 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, polyester resins, polypropylene and polyamide resins are particularly preferable, and polyester resins such as PET having excellent tensile strength are 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 of the warp is preferably 500 to 3000 dtex, particularly 1500 to 1800 dtex. If it is warp of such a fineness, it can be set as webbing (3) which has required intensity | strength. Further, the fineness of the weft is preferably 250-1500 dtex, particularly 500-1000 dtex. Furthermore, 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 preferably 45-300, especially 100-200. In the case of wefts, 20-200 yarns, particularly 45-130 yarns are preferred.

Hereinafter, the present invention will be specifically described with reference to the drawings.
Example 1
(1) Configuration of Seat Belt Device A seat belt device 1 according to this embodiment includes a webbing 3 and a through anchor 7 having an insertion hole 5 through which the webbing 3 is inserted. Moreover, the retractor 19 arrange | positioned at the one end side of the webbing 3 and the anchor 21 arrange | positioned at the other end side of the webbing 3 are provided. Furthermore, a tongue plate 23 inserted between the through anchor 7 and the anchor 21 of the webbing 3 and a buckle 27 with which the tongue plate 23 is engaged are provided (see FIG. 1).

  For forming the webbing 3, 1670 dtex multifilaments (144 pieces) made of PET resin were used as warps. In addition, 700 dtex multifilaments (96) made of PET resin were used as wefts. Further, the entire webbing 3 has a 2/2 twill structure. Further, the webbing 3 had a width of 94 mm and a thickness of 1.2 mm. Further, one element group 11 of the fastener 9 is attached to one end side in the width direction of the webbing 3 to be the shoulder belt 29 by sewing, and the other element group 13 is attached to the other end side by sewing (see FIG. 4). .

  Further, on the retractor 19 side and the anchor 21 side from the length range that becomes the shoulder belt 29 of the webbing 3, the webbing 3 was bent toward the center from both ends of the webbing 3, and the end surfaces were butted together and stitched. As a result, the webbing 3 had a width of 47 mm (94/2 mm) and a thickness of 2.4 mm (1.2 × 2 mm) except for the length of the shoulder belt 29. Further, of the inner peripheral surface 15 of the insertion hole 5 of the through anchor 7, the webbing (3) is provided at a substantially central portion in the width direction of the surface on which the load due to the pressing of the webbing (3) is not applied. The base end portion of the slider 17 was screwed into the screw hole. In this way, the slider 17 was fixed to the inner peripheral side of the insertion hole 5 of the through anchor 7 (see FIG. 3).

(2) Effects of Seat Belt Device In the seat belt device 1 of the present embodiment, the webbing 3 is substantially the same as the conventional normal webbing 3 in the portion wound around the retractor 19 and the portion serving as the waist belt 35. Width. Therefore, conventional retractors 19, tongue plates 23, and buckles 27 can be used as they are. Further, in the length range to be the shoulder belt 29, the occupant 31 pulls out the webbing 3 as in the prior art, so that one element group 11 and the other element group 13 of the fastener 9 can be easily and reliably separated from each other. Can do. Thereby, in the length range used as the shoulder belt 29, the width | variety of the webbing 3 becomes substantially twice the other part. The wide shoulder belt 29 can sufficiently reduce the load applied from the shoulder of the occupant 31 to the chest during a collision or the like.

  Further, in this embodiment, the webbing 3 is a 2/2 twill weave structure using multifilaments as a whole, and a conventional weaving apparatus for the webbing 3 can be used almost as it is. Therefore, although the processing after weaving is required, the substrate of the webbing 3 can be easily manufactured.

  In the present invention, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. For example, in the embodiment, the slider 17 is attached and fixed so as to protrude from a surface of the inner peripheral surface 15 of the insertion hole 5 on which the load due to the pressing of the webbing 3 is not applied. In this case, when the webbing 3 is pulled out or wound up in a direction substantially coinciding with the opening direction of the insertion hole 5 of the through anchor 7, smooth drawing and winding can be performed. However, when it is pulled out or taken up in an oblique direction, smooth drawing and winding may not be possible.

  Therefore, the slider 17 can be attached so as to be rotatable within the surface of the inner peripheral surface 15 of the insertion hole 5 of the through anchor 7. For example, the slider 17 can be fixed to a disc 37 rotatably disposed in the through anchor 7 (see FIGS. 5 and 6). The rotatable range is not particularly limited, and may be 10 to 45 °, particularly 15 to 30 ° in both the left and right directions, with the opening direction of the insertion hole 5 of the through anchor 7 as a reference (0 °). The slider 17 may be rotatable over 45 ° or 360 °, but is not particularly necessary. If the slider 17 can be rotated by 10 to 45 °, the webbing 3 can be pulled out smoothly unless the occupant 31 is forcibly pulled in an oblique direction. In addition, rewinding is facilitated.

  Further, as described above, the slider 17 can be rotated not only in the inner peripheral surface 15 of the insertion hole 5 but also in a three-dimensional direction. For example, the slider 17 can be fixed to a sphere 39 rotatably disposed in the through anchor 7 (see FIGS. 7 and 8). In this way, even when the occupant 31 is forcibly pulled in an oblique direction, the webbing 3 can be pulled out smoothly (see FIGS. 7 and 8).

  Further, when the occupant 31 wears the webbing 3, the webbing 3 is bent toward the center from each side end on the retractor 19 side from the through anchor 7 and on the anchor 21 side from the buckle 27. Thereby, the bending part 33 is formed in the intermediate part of the approximate center part of the width direction of the webbing 3, and both ends (refer FIG. 9). Therefore, compared with the shoulder belt 29, the width is substantially halved and the thickness is approximately doubled. In this case, in the webbing 3 which is often a 2/2 twill weave structure or the like as in the embodiment, the bent portion 33 may not be easily formed in a straight line. That is, the webbing 3 may not be easily bent.

  In order to solve the above-described problems, for example, the vicinity of the bent portion 33 may be a woven structure that is different from the other portions and is easy to bend. For example, [1] the vicinity of the bent portion 33 is 2/2 twill, the other portion is 1/1 plain weave, [2] the vicinity of the bent portion 33 is 2/2 plain weave, and the other portion is 1/1 plain weave. [3] The vicinity of the bent portion 33 is a 2/2 plain weave and the other portion is a 2/2 twill weave. [4] The vicinity of the bent portion 33 is a 2/2 twill weave, and the other portion is a 2/2 plain weave. ] In the vicinity of the bent portion 33 is a 1/1 plain weave and the other portion is a 2/2 twill weave. [6] In the vicinity of the bent portion 33 is a 1/1 plain weave and the other portion is a 2/2 plain weave. Can be mentioned.

  Moreover, it can also be made easy to bend | fold by making the fineness of the warp near the bending part 33 smaller than the fineness of the warp of another part. For example, the fineness of the warp in the vicinity of the bent portion 33 can be set to 400 to 900 dtex, particularly 500 to 800 dtex, and the fineness of the warp in the other portion can be set to 1400 to 2000 dtex, particularly 1500 to 1900 dtex. As this warp, a multifilament is usually used.

  On the other hand, when the entire webbing 3 has a 2/2 twill weave structure or the like as in the embodiment, the webbing 3 is opened when it is pulled out from the through anchor 7 and both ends of the bent portion 33 are opened to form a wide shoulder belt 29. It can be difficult. In order to solve such a problem, a method of increasing the rigidity in the width direction of the webbing 3 by using a monofilament as the weft is mentioned. Furthermore, by reducing the fineness of the warp yarn in the vicinity of the bent portion 33, it is possible to make it easy to bend as described above, and it is also possible to easily open both ends of the bent portion 33. Further, both ends of the bent portion 33 can be easily opened by making the woven structure a dense structure such as a 1/1 plain weave.

  The foregoing 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.

  INDUSTRIAL APPLICABILITY The present invention can be used in the technical field related to a seat belt device that can easily widen the width of the shoulder belt of the seat belt webbing. Further, the present invention can be used in the technical field related to a seat belt device that can restrain the chest from the shoulder of the occupant and sufficiently reduce the load applied to the chest from the shoulder of the occupant during a collision or the like.

  DESCRIPTION OF SYMBOLS 1; Seat belt apparatus, 3; Seat belt webbing, 5; Insertion hole, 7; Through anchor, 9; Fastener, 11; One element group, 13: The other element group, 15; Slider, 19; retractor, 21; anchor, 23; tongue plate, 25; vehicle seat, 27; buckle, 29; shoulder belt, 31; occupant, 33; 37; disk, 39; sphere.

Claims (3)

Seat belt webbing,
A through-anchor having an insertion hole through which the seat belt webbing is inserted, and a seat belt device comprising:
One element group of the fastener is attached to one end side in the width direction of the seat belt webbing, and the other element group of the fastener is attached to the other end side,
In the through anchor, a slider for engaging or separating the one element group and the other element group is attached to the inner peripheral surface of the insertion hole,
In the seat belt webbing, the one element group and the other element group are separated on the tongue plate side from the through anchor,
In the seat belt webbing, the one element group and the other element group are engaged with each other on the retractor side of the through anchor.   2. The slider according to claim 1, wherein the slider is attached to a surface of the inner peripheral surface of the insertion hole that is not subjected to a load due to pressing of the seat belt webbing when the seat belt webbing is pulled out. Seat belt device.   The seat belt device according to claim 1 or 2, wherein the slider is rotatably attached to the through anchor so that a relative orientation with respect to the through anchor can be changed.

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