JP2019014451A - Seat Belt Device - Google Patents

Abstract

To facilitate assembly of a restriction member to a webbing.SOLUTION: A seat belt device 10 includes a main boot 36 in which a webbing 20 is stored, where the main boot 36 is formed with a slit 50 and the slit 50 splits the main boot 36 in a circumferential direction. Thus, the webbing 20 can be stored in the main boot 36 via the slit 50, thereby facilitating assembly of the main boot 36 to the webbing 20.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seat belt device for occupant protection.

  In the seat belt device described in Patent Document 1, one end of the webbing is supported on the vehicle body side, and one end side portion of the webbing is accommodated in the boot, and the curvature of the webbing is limited by the boot.

International Publication No. 2012/137704

  By the way, in assembling the seat bell device, it is preferable that the boot can be easily assembled to the webbing.

  The present invention has been made in view of the above facts, and an object of the present invention is to provide a seat belt device in which a restriction member can be easily assembled to a webbing.

  In the first aspect of the present invention, one end side is supported on the vehicle body side, a webbing to be mounted on a vehicle occupant, and one end side portion of the webbing is housed inside to limit the curvature of the webbing, and the tip side is A limiting member that faces the door opening of the vehicle body, and a dividing portion that is provided on the limiting member and divides the limiting member in the circumferential direction.

  According to a second aspect of the present invention, in the first aspect, the restriction member is locked to the webbing.

  According to a third aspect of the present invention, in the first aspect or the second aspect, the first member is made softer than the restricting member, the one end side portion of the webbing is accommodated therein, and the distal end side of the restricting member is A covering member for covering is provided.

  According to a fourth aspect of the present invention, in the third aspect, a sewing member for locking the covering member to the restriction member is provided.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the dividing portion is provided on the vehicle exterior side of the limiting member.

  In the first aspect of the present invention, one end of the webbing is supported on the vehicle body side, and the webbing is attached to the vehicle occupant. In addition, one end side portion of the webbing is accommodated in the restricting member so that the restricting member restricts the bending of the webbing and the front end side of the restricting member is opposed to the door opening of the vehicle body.

  Here, the limiting member is provided with a dividing portion, and the dividing portion divides the limiting member in the circumferential direction. For this reason, a webbing can be accommodated in a limiting member via a division | segmentation part, and a limiting member can be easily assembled | attached to webbing.

  In the second aspect of the present invention, the limiting member is locked to the webbing. For this reason, the movement of the webbing with respect to the limiting member can be restricted.

  In the third aspect of the present invention, the one end side portion of the webbing is accommodated in the covering member, and the covering member is made softer than the restricting member and covers the distal end side of the restricting member. For this reason, it can suppress that a passenger | crew contacts the front-end | tip of a limiting member.

  In the fourth aspect of the present invention, the sewing member locks the covering member to the limiting member. For this reason, the covering member can be easily locked to the limiting member.

  In the fifth aspect of the present invention, the dividing portion is provided on the vehicle outer side of the limiting member, and the vehicle inner side of the limiting member is made more rigid than the vehicle outer side of the limiting member. For this reason, when the limiting member is deformed to the vehicle outer side, the restoring force to the vehicle inner side generated in the limiting member can be increased, and the deformation of the limiting member to the vehicle outer side can be easily restored.

It is a front view which shows the principal part of the vehicle provided with the seatbelt apparatus which concerns on this Embodiment. It is the perspective view seen from the vehicle width inside which shows the outline of the principal part of a vehicle. It is a perspective view which shows the principal part of a seatbelt apparatus. It is a top view which shows a main boot and a subboot.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing an outline of a main part of a vehicle provided with a seat belt device 10 according to the present embodiment. FIG. 2 shows an outline of the main part of the vehicle within the vehicle width. It is shown in the perspective view seen from the direction. FIG. 3 is a perspective view of the main part of the seatbelt device 10 as viewed obliquely from the front of the vehicle. FIG. 1 shows the seat belt device 10 in a mounted state (the following webbing 20 is mounted), and FIG. 2 shows the seat belt device 10 in a non-mounted state (the following webbing 20 is not mounted). Has been. In each figure, the front of the vehicle is indicated by an arrow UP, the upper side is indicated by an arrow UP, and the outward in the vehicle width direction is indicated by an arrow OUT.

  As shown in FIGS. 1 and 2, the seat belt device 10 is provided in a seat 14 that is a rear seat as a seat in a vehicle 12, and a passenger sitting on the seat 14 wears the following webbing 20, The occupant is protected in the event of a vehicle emergency such as a vehicle collision. Further, the vehicle 12 is provided with a door 16 (hinge door or slide door) outside the vehicle width of the seat 14 (see FIG. 1), and the door 16 is opened when the passenger gets on and off. The opening 18 is opened (see FIG. 2).

  As shown in FIG. 2, the seat belt device 10 includes a long webbing 20 and a webbing take-up device (retractor) 22 as a webbing storage means (storage means), and the webbing take-up device 22 is a seat 14. The seat back 14A is fixed to the vehicle body on the rear side of the vehicle. The webbing take-up device 22 includes a spool (winding shaft) 24, and the longitudinal direction base end portion of the webbing 20 is locked to the spool 24. The spool 24 is rotatable in the winding direction (webbing winding direction) and the drawing direction (webbing drawing direction) around the axis, and the webbing 20 is wound around the outer periphery of the spool 24 from the base end side in the longitudinal direction. And stored in the webbing take-up device 22.

  The webbing take-up device 22 includes a lock mechanism and an urging mechanism (both not shown). In the webbing take-up device 22, rotation of the spool 24 in the pulling-out direction is restricted by operating a lock mechanism in the event of a vehicle emergency, and drawing of the webbing 20 from the spool 24 is restricted. In the webbing take-up device 22, the spool 24 is urged in the take-up direction by the urging mechanism, and the webbing 20 is urged in the take-up direction to the spool 24.

  As shown in FIGS. 1 to 3, a webbing guide 26 (or a shoulder anchor or the like) is disposed outside and above the vehicle width of the seat back 14 </ b> A. It is attached to the vehicle body (or a member constituting a skeleton in the seat 14) in front of the vehicle. The front end side in the longitudinal direction of the webbing 20 (the side opposite to the base end side in the longitudinal direction) is pulled out from the slit hole 26A of the webbing guide 26 to the front of the seat back 14A. Further, the front end of the webbing 20 in the longitudinal direction is locked to the anchor plate 28, and the anchor plate 28 is located on the vehicle body (a member constituting a skeleton in the seat 14 or the like) outside and below the vehicle width of the seat 14. It is fixed. Thereby, as for webbing 20, the longitudinal direction between webbing take-up device 22 and an anchor plate is made into the up-and-down direction in the state where a crew member is not wearing.

  As shown in FIGS. 1 and 2, the webbing 20 is provided with a tongue (tang plate) 30. The webbing 20 is inserted into the tongue 30, and the tongue 30 is movable below the webbing guide 26 in the longitudinal direction of the webbing 20.

  A buckle 32 is provided on the inner side of the seat cushion 14 </ b> B of the seat 14, and the buckle 32 is attached to a member constituting a skeleton in the vehicle body or the seat 14. The buckle 32 can hold the tongue 30, and the webbing 20 is mounted on the occupant's body by holding the tongue 30 on the buckle 32 in a state where the webbing 20 is hung around the occupant's body seated on the seat 14. The seat belt device 10 is put on.

  As shown in FIG. 1, in a state where the webbing 20 is mounted on the occupant's body, the portion of the webbing 20 between the tongue 30 and the anchor plate 28 is the lap webbing 20A, and the occupant's waist is the lap webbing 20A and the seat. It is restrained between the cushion 14B. Further, a portion of the webbing 20 between the webbing guide 26 and the tongue 30 is a shoulder webbing 20B, and the shoulder and chest of the occupant are restrained between the shoulder webbing 20B and the seat back 14A.

  As shown in FIGS. 1 and 2, the seat belt device 10 includes a flat, generally cylindrical main boot 36 as a limiting member, and a flat, generally cylindrical sub-boot 38 as a covering member. FIG. 4 shows the main boot 36 and the sub boot 38 in a plan view. 3 and 4, the longitudinal direction of the main boot 36 is indicated by an arrow L, and the width direction of the main boot 36 is indicated by an arrow W.

  As shown in FIGS. 1 to 3, the main boot 36 and the sub boot 38 are disposed between the anchor plate 28 and the tongue 30, the main boot 36 is disposed on the anchor plate 28 side, and the sub boot 38 is disposed on the tongue 30. Arranged on the side.

  The main boot 36 is made of a flexible resin having a predetermined hardness (predetermined Shore hardness D), and in this embodiment, low density polyethylene (LDPE) is used. As shown in FIGS. 3 and 4, the main boot 36 is formed with wall portions 40 and 42 that are substantially band-shaped and are opposed to each other to form a peripheral wall. In the W direction), the wall portions 40 and 42 are connected to each other by a connecting portion 44 that constitutes a peripheral wall at both ends. The connecting portion 44 is formed to be curved convexly outward in the width direction of the main boot 36 between the wall portions 40, 42. The main boot 36 has a long opening (an opening between the wall portions 40, 42). It is in the hole.

  The size of the opening of the main boot 36 is such that the webbing 20 can be inserted in a state in which the width direction of the webbing 20 is the width direction of the wall portions 40 and 42. The surfaces on both sides are inserted between the wall portions 40, 42 so as to face the inner surfaces of the wall portions 40, 42. As a result, the webbing 20 is accommodated in the main boot 36.

  A substantially rectangular extending portion 46 as a covering portion is provided on one end side in the longitudinal direction of each of the wall portions 40 and 42, and each of the extending portions 46 extends in the width direction of the wall portions 40 and 42. The width dimension along is made smaller (shorter) than the width dimension of the wall portions 40 and 42. A widened portion 48 whose width dimension is gradually increased is provided on each wall 40, 42 side of the extended portion 46, and the extended portion 46 is gradually widened by the widened portion 48. As a result, the width of the wall portions 40 and 42 is brought close to the wall portions 40 and 42 so as to be connected. The extending portions 46 of the wall portions 40 and 42 are separated from each other without being provided with the connecting portion 44, so that each of the extending portions 46 can be bent (elastically deformed) in the contact and separation directions.

  A slit 50 as a split portion is formed at the center in the width direction on the one wall 40 side of the main boot 36, and the slit 50 extends in a straight line substantially parallel to the longitudinal direction of the main boot 36. It is formed over the entire region from the distal end of the installation portion 46 to the proximal end opposite to the extension portion 46. The wall portion 40 side of the main boot 36 is separated into wall portions 40A and 40B by a slit 50, and each of the wall portions 40A and 40B is connected to the wall portion 42 via a connecting portion 44. Thereby, the main boot 36 is elastically deformed in the direction in which the wall portions 40A and 40B are separated from the wall portion 42 side, so that the space between the wall portions 40A and 40B (opening of the slit 50 portion) is widened.

  A circular locking hole 52 as a locking portion is formed in the wall portions 40 and 42, and each of the extended portions 46 of the wall portions 40 and 42 has a long hole as a locking portion. A stop hole 54 is formed. The locking holes 52 of the wall portion 40 are perforated (penetrated) in pairs (the wall portion 40A and the wall portion 40B) across the slit 50 at a plurality of locations in the longitudinal direction of the wall portion 40. The locking holes 54 of the extending part 46 on the wall 40 side are perforated in pairs on both sides in the width direction with the slit 50 in the middle part in the longitudinal direction of the extending part 46. The longitudinal direction is substantially parallel to the longitudinal direction of the wall 40.

  The locking holes 52 of the wall portion 42 are perforated so as to be coaxial with the locking holes 52 of the wall portion 40, and the locking holes 54 of the extended portion 46 on the wall portion 42 side are perforated. It is perforated at a position and orientation that overlaps with the locking hole 54 of the extension portion 46 on the side.

  The main boot 36 is formed with semicircular cuts 56 as strength-reducing portions on both sides in the width direction at intermediate positions in the longitudinal direction of the wall portions 40, 42, and each of the connecting portions 44 is formed by the cuts 56. It is divided (partially cut off), and the wall portions 40 and 42 are not connected at the cut 56 portion.

  As shown in FIG. 1 to FIG. 3, the main boot 36 has a wall on the side opposite to the extending portion 46 relative to the webbing 20 on the anchor plate 28 side and in which a slit 50 is formed. It arrange | positions so that the part 40 side may face a vehicle width outward. Further, as shown in FIGS. 1 and 2, the main boot 36 is disposed such that a cut 56 is positioned outside the vehicle width of the seat cushion 14B seating surface (upper surface).

  As a result, as shown by a two-dot chain line in FIG. 2, the main boot 36 protrudes upward from the seat surface of the seat cushion 14 </ b> B above the notch 56 and the webbing 20 when the occupant is not wearing the webbing 20. When the distal end portion of the longitudinal direction is rotated in the vehicle longitudinal direction (vertical direction) about the anchor plate 28, the distal end portion (upper end portion) faces the door opening 18 outside the vehicle width. The length of the main boot 36 on the anchor plate 28 side (the side opposite to the extending portion 46) from the notch 56 is such that the main boot 36 is separated from the anchor plate 28.

  As shown in FIG. 3, the webbing 20 and the main boot 36 are sewn by a sewing thread 58 as a sewing member, and the main boot 36 is locked to the webbing 20. The sewing thread 58 is inserted from one of the locking hole 52 of the wall portion 40 and the locking hole 52 of the wall portion 42 and pulled out from the other. At this time, the sewing thread 58 is inserted into the webbing 20. Further, the sewing thread 58 is wound so as to straddle the pair of locking holes 52 in each of the wall portions 40 and 42. As a result, the webbing 20 and the main boot 36 are sewn by the sewing thread 58 at a plurality of locations in the longitudinal direction, and the main boot 36 is locked to the webbing 20.

  As shown in FIGS. 3 and 4, the wall portion 40 of the main boot 36 is formed with a slit 60 on the opposite side of the extending portion 46 from the longitudinal intermediate portion. 40 (wall portions 40A, 40B) are formed substantially parallel to the width direction. As shown in FIG. 3, the webbing 20 is provided with a label 62 such as a serial number at a predetermined position on the anchor plate 28 side. The label 62 has one side portion in the longitudinal direction of the webbing 20 in the width direction of the webbing 20. The webbing 20 is sewn along. When the webbing 20 is accommodated in the main boot 36, when the label 62 is applied to the main boot 36, the part of the label 62 opposite to the sewing side to the webbing 20 is pulled out from the slit 60. Thereby, the label 62 provided on the webbing 20 is made visible.

  On the other hand, the sub boot 38 is made of a softer resin than the main boot 36. In the present embodiment, soft polyvinyl chloride (soft polyvinyl chloride) having a predetermined hardness (predetermined Shore hardness A) is used. It has been. The sub-boot 38 is formed flat like the main boot 36, and the openings on both sides in the longitudinal direction are formed into long holes. In addition, the sub boot 38 has the same size in the longitudinal direction of the opening as the size in the outer width direction of the main boot 36, and the width of the opening in the sub boot 38 has the same width in the outer thickness direction of the main boot 36 (the walls 40 and 42. It is smaller than the dimension in the thickness direction).

  The webbing 20 is inserted into the sub boot 38, and the main boot 36 is press-fitted from the extended portion 46 side. For this reason, the entire extension portion 46 of the main boot 36 is accommodated in the sub boot 38 and the end portions of the wall portions 40 and 42 of the main boot 36 on the extension portion 46 side are accommodated and covered.

  A plurality of circular locking holes 64 as communication portions are formed in the middle portion of the sub-boot 38 in the longitudinal direction, and the locking holes 64 are formed on the extended portion 46 of the main boot 36 accommodated in the sub-boot 38. It is perforated so as to face each locking hole 54. In the sub-boot 38, the sewing thread 58 inserted from the locking hole 64 on one side wall is pulled out from the locking hole 64 on the other side wall. At this time, the sewing thread 58 is inserted into the locking holes 54 and the webbing 20 of each of the pair of extending portions 46, and is sewn so as to straddle the locking holes 64 that are paired on the side walls of the sub-boots 38. A thread 58 is wound. Accordingly, the sub boot 38 is sewn to the webbing 20 together with the extending portion 46 of the main boot 36 by the sewing thread 58, and the sub boot 38 is locked to the webbing 20 and the main boot 36.

Next, the operation of this embodiment will be described.
The webbing 20 of the seatbelt apparatus 10 having the above-described configuration is provided with a main boot 36 and a subboot 38 between the anchor plate 28 and the tongue 30, and the assembly of the main boot 36 and the subboot 38 to the webbing 20 will be described. To do.

  The webbing 20 is inserted into the tongue 30 and an anchor plate 28 is attached to the front end in the longitudinal direction, and the anchor plate 28 is fixed to the vehicle body. The main boot 36 is disposed on the anchor plate 28 side, and the sub boot 38 is disposed on the tongue 30 side.

  The sub-boot 38 is attached between the tongue 30 of the webbing 20 and the anchor plate 28 prior to the attachment of the main boot 36 to the webbing 20. For this reason, the subboot 38 may be attached to the webbing 20 when the tongue 30 is attached to the webbing 20. Further, since the sub-boot 38 is made soft, the opening can be widened and the webbing 20 can be inserted from the anchor plate 28 side and attached to the webbing 20 prior to fixing the anchor plate 28 to the vehicle body.

  Here, a slit 50 is formed on the wall 40 side of the main boot 36, and the main boot 36 is divided into a wall 40A side and a wall 40B side in the circumferential direction by the slit 50. For this reason, by elastically deforming the wall portions 40A and 40B of the main boot 36, the opening of the slit 50 (between the wall portions 40A and 40B) is widened, and the opening of the widened slit 50 enters the main boot 36. The webbing 20 can be inserted. For this reason, even when the longitudinal dimension of the main boot 36 is large and when the anchor plate 28 is attached to the front end of the webbing 20 in the longitudinal direction, the webbing 20 can be inserted into the main boot 36 and the main boot 36 can be easily attached to the webbing 20. Can be assembled to.

  Further, the main boot 36 is inserted (press-fitted) into the sub boot 38 in which the extending portion 46 is previously disposed on the webbing 20, and the position of the main boot 36 relative to the webbing 20 is adjusted. Further, the wall portions 40, 42 are sewn to the webbing 20 by the sewing thread 58 using the locking holes 52 of the wall portions 40, 42 of the main boot 36, and the locking holes 54 of the extending portion 46 of the main boot 36 are sewn. The main boot 36 and the sub boot 38 are locked to the webbing 20 and assembled by sewing the sub boot 38 and the extending portion 46 to the webbing 20 with the sewing thread 58 using the locking holes 64 of the sub boot 38. For this reason, the main boot 36 and the sub boot 38 can be easily locked (fixed) to the webbing 20, and the main boot 36 and the sub boot 38 can be easily assembled to the webbing 20. Further, the webbing 20 can be restricted from moving relative to the main boot 36 and the sub boot 38 in the longitudinal direction. In addition, since the space between the wall portions 40A and 40B of the main boot 36 is sewn by the sewing thread 58, it is possible to suppress unnecessary opening between the wall portions 40A and 40B of the main boot 36 (slit 50).

  Further, the extended portion 46 of the main boot 36 is inserted into the sub-boot 38, the locking hole 64 of the sub-boot 38 is made a circular hole, and the locking hole 54 of the extended portion 46 is made a long hole. The main boot 36 is elongated in the longitudinal direction. For this reason, when the extended portion 46 is inserted into the sub boot 38, the locking hole 54 of the extended portion 46 is easily exposed through the locking hole 64 of the sub boot 38. 46 can be easily sewn to the webbing 20.

  Further, the main boot 36 restricts the bending of the front end portion of the webbing 20 in the longitudinal direction, and the front end portion of the webbing 20 in the longitudinal direction of the webbing 20 is centered on the anchor plate 28 when the webbing 20 is not mounted. When rotated, the tip of the main boot 36 is opposed to the door opening 18 on the vehicle width outside. For this reason, when holding | maintenance of the tongue 30 by the buckle 32 is cancelled | released and mounting | wearing of the webbing 20 to a passenger | crew is cancelled | released, when the webbing 20 is wound up by the biasing mechanism in the spool 24 in the webbing winding device 22. The main boot 36 can prevent the front end portion in the longitudinal direction of the webbing 20 from being caught by an obstacle in the passenger compartment (for example, a tire house near the door opening 18).

  Further, when the occupant is not wearing the webbing 20, the sub boot 38 restricts the lowering of the tongue 30 toward the anchor plate 28, whereby the tongue 30 is held at a predetermined height position from the seat cushion 14B seating surface. For this reason, it is not necessary to separately provide the webbing 20 with a stopper that restricts the lowering of the tongue 30 toward the anchor plate 28, and the configuration can be simplified.

  Further, the entire extended portion 46 of the main boot 36 is covered with the sub boot 38, and the sub boot 38 is made softer than the main boot 36. For this reason, it can suppress that a passenger | crew contacts the relatively hard extension part 46 (especially peripheral part of the extension part 46).

  On the other hand, when the occupant wears the webbing 20, the lap webbing 20A is hung around the occupant's waist. At this time, since the wall portions 40 and 42 of the main boot 36 are bent at the notch 56 portion, it is possible to suppress the main boot 36 from obstructing the mounting of the webbing 20. Moreover, the front end portion of the main boot 36 in the longitudinal direction is an extended portion 46, which is more easily elastically deformed than the side portions of the wall portions 40 and 42. For this reason, it can suppress that the main boot 36 prevents that the webbing 20 closely_contact | adheres to a passenger | crew, and a passenger | crew can mount | wear the webbing 20 closely.

  On the other hand, when the occupant releases the wearing of the webbing 20 (holding release of the tongue 30 by the buckle 32), the main boot 36 that has been elastically deformed so as to be broken at the notch 56 portion is restored to a linear shape. For this reason, it can suppress that webbing 20 leaves | separates smoothly from a passenger | crew, and webbing 20 catches a passenger | crew.

  Further, for example, when the occupant gets out of the vehicle, if the webbing 20 is pulled outwardly of the vehicle width, the main boot 36 is elastically deformed so as to be bent outwardly of the vehicle width, for example, at a notch 56 portion. Here, a slit 50 is provided on the wall 40 side that is the vehicle width outside of the main boot 36, and the wall 42 side that is the vehicle width inside of the main boot 36 is more rigid than the wall 40 side of the main boot 36. It is high. For this reason, when the tensile force to the outside of the vehicle width with respect to the webbing 20 is released, the restoring force to the inside of the vehicle width generated in the main boot 36 can be increased, and the main boot 36 is elastically deformed to the outside of the vehicle width. Can be easily restored.

  In the present embodiment, a linear slit 50 that is parallel to the longitudinal direction of the main boot 36 is formed as a divided portion. However, the dividing portion is not limited to a straight line, and may be a curved line, or may be provided inclined with respect to the longitudinal direction of the main boot 36.

  In the present embodiment, the lower end of the main boot 36 is attached to the webbing 20 while being separated from the anchor plate 28. However, the main boot 36 may be locked to the anchor plate 28. In this case, the anchor plate 28 may be accommodated in the lower end portion of the main boot 36 and the main boot 36 may be locked to the webbing 20, or the lower end portion of the main boot 36 may be locked to the anchor plate 28. good.

  Further, in the present embodiment, the sewing thread 58 is applied as a locking member used for locking the main boot 36 and the sub boot 38 to the webbing 20. However, a thread-like material such as a staple may be used for the locking member.

  Further, in the present embodiment, soft polyvinyl chloride (soft polyvinyl chloride) is used for the sub-boots 38 as the covering member. However, the covering member is not limited to this, and any resin may be used as long as it is a soft resin (a resin whose hardness is represented by Shore hardness A).

10 Seat belt device 20 Webbing 36 Main boot (restricting member)
38 Sub-boots (Coating members)
50 slits (dividing part)

Claims (5)

One end side is supported on the vehicle body side, webbing to be mounted on the vehicle occupant,
A limiting member in which the one end side portion of the webbing is housed inside to limit the bending of the webbing, and the front end side is opposed to the door opening of the vehicle body,
A dividing portion provided on the restriction member and dividing the restriction member in a circumferential direction;
A seat belt device comprising:   The seat belt device according to claim 1, wherein the restricting member is locked to the webbing.   The seatbelt device according to claim 1 or 2, further comprising a covering member that is softer than the restricting member, accommodates one end side portion of the webbing therein, and covers a distal end side of the restricting member.   The seat belt device according to claim 3, further comprising a sewing member for locking the covering member to the restricting member. The seat belt device according to any one of claims 1 to 4, wherein the dividing portion is provided on an outer side of the restricting member.