JP2009220591A - Seat belt device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt device for an automobile constituted such that a tongue is positioned at a webbing distal end side relative to the webbing when assembling, continuously, smoothly and easily passing a belt anchor and the tongue to an opening part formed on a trim with the webbing, and thereafter, function of the stopper for engaging the tongue can be exhibited. <P>SOLUTION: The stopper 17 has resilient property in a webbing thickness direction and engages the tongue 15 without passing through a webbing insertion part 15c by own weight of the tongue 15. When the tongue 15 is relatively moved from the webbing distal end side to a webbing base end side than the stopper 17 relative to the webbing 13 when assembling, the stopper 17 is contracted in the webbing thickness direction and is passed through the webbing insertion part 15c when the stopper 17 receives force of constant or more from the webbing insertion part 15c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automobile seat belt device, and normally, a stopper provided on the webbing restricts a tongue that is movably mounted on the webbing so as not to move downward with respect to the webbing. When the tongue is moved relative to the webbing from the webbing tip side to the webbing base end side rather than the stopper, the stopper passes through the webbing insertion part of the tongue and then functions to regulate the downward movement of the tongue. To get.

  2. Description of the Related Art Conventionally, in a so-called three-point support type seat belt device installed in an automobile, a webbing take-up device and a shoulder anchor are attached to a side portion (such as a pillar or a wheel house) of a vehicle body, and the webbing is led out from the webbing take-up device. A belt anchor attached to the front end of the webbing is fixed to the floor of the vehicle body or the vicinity thereof, and the webbing is inserted into the webbing insertion part of the tongue. The tongue is detachably attached to the buckle that is movably attached to the webbing and connected to the vehicle body.

  As a seat belt device for this type of automobile, a stopper provided on the webbing is used to hold an unused tongue at a height position (for example, approximately the same height position as the seat seat surface) that is easily grasped by an occupant. A device that locks the tongue so as not to move downward with respect to the webbing (see, for example, Patent Document 1) has been put to practical use. In the seat belt device of Patent Document 1, the stoppers are button-shaped first and first. The two members are connected to each other with the webbing interposed therebetween so as to bulge from the webbing in the webbing thickness direction.

  Further, as a seat belt device of this type of automobile, the webbing take-up device and the shoulder anchor are provided outside the trim facing the inside of the vehicle, and the webbing led out from the webbing take-up device and hung on the shoulder anchor is used as the trim. The one that is introduced into the vehicle from the formed opening and extends downward (for example, see Patent Document 2) is widely put into practical use. In the seat belt device of Patent Document 2, a bezel is attached to the opening of the trim, and the bezel A slit for inserting a webbing is formed.

  By the way, in a seat belt device in which the webbing take-up device and the shoulder anchor are provided outside the trim, the belt anchor is generally attached to the front end portion of the webbing led out from the webbing take-up device, and the tongue is attached to the webbing. Since the assembly is performed with the belt mounted, the belt opening anchor, webbing, and tongue need to be trimmed through the trim opening. When the threading operation is performed, the belt anchor, the webbing, and the tongue are sequentially passed through the opening of the trim while the other hand holds the trim before mounting with one hand.

JP 2007-137259 A JP 2004-330992 A

  As described above, in the seat belt device in which the webbing take-up device and the shoulder anchor are provided outside the trim, the belt anchor attached to the tip of the webbing led out from the webbing take-up device when assembled, Webbing, trim opening through the trim opening to pass the tongue attached to the webbing is required, but in the case of a seat belt device provided with a stopper on the webbing as in Patent Document 1, the stopper The tongue cannot be moved along the webbing so that the distance from the belt anchor cannot be made more than a certain distance.

  Therefore, when the operator performs the trim opening through operation, when holding the trim before mounting with one hand, the belt anchor, webbing and tongue are sequentially passed through the trim opening with the other hand. The other hand requires at least troublesome transfer from the belt anchor to the tongue, and the webbing take-up device may force the webbing in the take-up direction. In some cases, the tongue cannot be continuously and smoothly passed through the opening of the trim.

  Here, by enlarging the trim opening, the operator can hold the belt anchor and tongue together and pass the trim opening along with the webbing, but this large trim opening enhances the appearance of the interior of the vehicle. Make it worse. Therefore, as in Patent Document 2, when the bezel is attached to the trim opening and the webbing slit is formed in the bezel, the appearance of the vehicle can be prevented from being deteriorated. Further, it is necessary to pass the bezel through the opening of the trim, and the number of parts may increase, leading to an increase in cost.

  The object of the present invention is to position the tongue on the webbing tip side of the webbing with respect to the webbing at the time of assembly, and to make the belt anchor and tongue together with the webbing smoothly and easily formed in the trim. After that, the tongue moves relative to the webbing from the webbing tip side to the webbing base end side rather than the stopper, so that the stopper passes through the webbing insertion part of the tongue, and then the stopper ensures the tongue. It is intended to provide an automobile seat belt device that can be locked so as not to move downward relative to the webbing.

  A seat belt device for an automobile according to the present invention includes a webbing take-up device and a shoulder anchor provided on the vehicle outer side than a trim facing the inside of the automobile, and is formed on the trim by being led out from the webbing take-up device and hung on the shoulder anchor. This webbing has a webbing that is introduced into the vehicle from the opened opening and extends downward, a belt anchor that is attached to the front end of the webbing and is fixed to the floor of the vehicle body or its vicinity, and a webbing insertion part through which the webbing is inserted. A tongue that is movably attached to the webbing through the insertion portion and is attachable to and detachable from a buckle connected to the vehicle body side, and a tongue that is provided on the webbing and locks the tongue so as to restrict the tongue from moving downward with respect to the webbing. It is provided with a stopper.

  According to a first aspect of the present invention, the stopper has elasticity in the webbing thickness direction, locks the tongue without passing through the webbing insertion portion by its own weight, and at least attaches the tongue to the webbing during assembly. When the stopper receives a force exceeding a certain level from the webbing insertion part of the tongue when moving the webbing relative to the webbing distal end side relative to the webbing, the webbing shrinks in the webbing thickness direction. It is configured to pass through the insertion portion.

  In this seat belt device, at the time of assembly, the tongue is positioned with respect to the webbing on the front end side of the webbing relative to the stopper, and the tongue is moved along the webbing so that the distance between the belt anchor and the belt anchor is reduced. And the tongue can be smoothly and easily passed through the trim opening together with the webbing, and then the tongue is moved relative to the webbing from the webbing distal end side to the webbing proximal end side rather than the stopper. When the stopper receives a force of a certain level or more from the webbing insertion portion of the tongue, the stopper shrinks in the webbing thickness direction, passes through the webbing insertion portion, and then expands and returns in the webbing thickness direction. A height position where the occupant can easily grip an unused tongue while being fixed to the floor of the vehicle body or the vicinity thereof (for example, To retain substantially the same height position) and seating surface, the stopper is regulated so as not to move downward relative to the webbing locks securely engage the tang.

  According to a second aspect of the present invention, in the first aspect of the present invention, the stopper includes a bulging sewing portion that is sewed on the webbing with a predetermined sewing thread so as to bulge from the webbing in the webbing thickness direction. According to a third aspect of the present invention, in the invention of the second aspect, the bulging sewing portion includes a linear sewing portion that is long in the webbing width direction, and a webbing width closer to the front end of the webbing than the linear sewing portion. And a plurality of chevron-shaped sewing portions that are juxtaposed in the direction and pointed toward the front end of the webbing.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the stopper is formed of a resin plate member that is fixed to the webbing and has a tapered portion that increases in the webbing thickness direction toward the webbing proximal end side. The invention of claim 5 is the invention of claim 4, wherein the resin plate member is fixed to the webbing at a plurality of portions by a plurality of fasteners. A seventh aspect of the present invention is characterized in that, in any one of the first to fifth aspects, the opening is a webbing insertion slit formed in the main body of the trim.

  According to the vehicle seat belt device of the first aspect, at the time of assembling, the tongue is positioned on the front end side of the webbing with respect to the webbing, and the tongue is moved along the webbing so that the distance from the belt anchor is reduced. In this state, the belt anchor and the tongue can be continuously and smoothly passed through the trim opening together with the webbing. Therefore, the load of the trim opening passing operation can be reduced. The tongue is moved relative to the webbing tip side from the webbing tip side to the webbing base end side with respect to the stopper, and when the stopper receives a certain level of force from the webbing insertion part of the tongue, the tongue shrinks in the webbing thickness direction. Pass through the webbing insertion part, and then the stopper expands in the webbing thickness direction and returns to the belt anchor. In order to hold the unused tongue at a height position where it can be easily gripped by the occupant (for example, approximately the same height position as the seat seat surface), the stopper ensures that the tongue is secured. It can be controlled so that it does not move downward relative to the webbing, thus improving the assemblability (automotive productivity) and reducing the opening to achieve the above effect. This can prevent the appearance of the car from deteriorating.

  According to the automobile seat belt device of the second aspect, the stopper includes a bulging sewing portion that is formed on the webbing with a predetermined sewing thread so as to bulge from the webbing in the webbing thickness direction. The stopper has a simple structure including the bulging sewing portion, and the contraction / expansion in the webbing thickness direction and the original stopper function can be surely exhibited when the bulging sewing portion is passed through the trim opening.

  According to the automobile seat belt device of the third aspect, the bulging sewn part is a linear sewn part that is long in the webbing width direction, and is juxtaposed in the webbing width direction on the front end side of the webbing with respect to the linear sewn part. Since it has a plurality of angle-shaped sewing parts pointed to the front end, the straight sewing part normally holds the tongue securely, and the tongue is attached to the webbing from the front end side of the webbing rather than the stopper during assembly. When moving relatively to the end side, the tongue webbing insertion portion first contracts the webbing tip side end portions of the plurality of angle hooks in the webbing thickness direction, and this can be easily performed. Next, the plurality of angle-shaped sewing parts are securely contracted in the webbing thickness direction sequentially from the webbing distal end side to the webbing proximal end side, and then the linear sewing parts are confirmed in the webbing thickness direction. To contract, the bulging sewn portion can pass through the webbing insertion portion of the smooth tongue. The plurality of chevron-shaped sewing portions can be expected to have a function of reinforcing the linear sewing portion for locking the tongue from the webbing front end side.

  According to the automobile seat belt device of the fourth aspect, the stopper is made of a resin plate member that is fixed to the webbing and has a tapered portion that becomes thicker in the webbing thickness direction toward the webbing proximal end side. The end of the webbing proximal end of the member securely locks the tongue. When the tongue is moved relative to the webbing from the webbing distal end side to the webbing proximal end side rather than the stopper during assembly, The webbing insertion portion reliably contracts the taper portion in the webbing thickness direction sequentially from the webbing distal end side to the webbing proximal end side, so that the resin plate member can smoothly pass through the tongue webbing insertion portion.

  According to the automobile seat belt device of claim 5, since the plurality of portions of the resin plate member are fixed to the webbing by the plurality of fasteners, the resin plate member is fixed to the webbing securely and fixed, The shrinkage / expansion in the webbing thickness direction and the original stopper function can be surely exhibited during the operation of passing the resin plate member through the trim opening.

  According to the vehicle seat belt device of the sixth aspect, since the opening is formed by a webbing insertion slit formed in the main body of the trim, an additional bezel or the like is not provided, that is, an increase in cost is suppressed. As a result, the opening (the slit) can be made smaller to improve the assemblability, and the appearance in the vehicle can be prevented from deteriorating.

  A seat belt device for an automobile according to the present invention includes a webbing take-up device and a shoulder anchor provided on the vehicle outer side than a trim facing the inside of the automobile, and is formed on the trim by being led out from the webbing take-up device and hung on the shoulder anchor. This webbing has a webbing that is introduced into the vehicle from the opened opening and extends downward, a belt anchor that is attached to the front end of the webbing and is fixed to the floor of the vehicle body or its vicinity, and a webbing insertion part through which the webbing is inserted. A tongue that is movably attached to the webbing through the insertion portion and is attachable to and detachable from a buckle connected to the vehicle body side, and a tongue that is provided on the webbing and locks the tongue so as to restrict the tongue from moving downward with respect to the webbing. The present invention is applied to an automobile seat belt device provided with a stopper.

  As shown in FIGS. 1 to 5, the rear structure 2 of the automobile 1 includes a rear floor 3, a pillar 4, and a wheel house 5 as a rear body, and a trim 6 facing the interior 1 a of the pillar 4 and the wheel house 5. 7 is installed. The pillar 4, the wheel house 5, and the trims 6 and 7 are provided in a pair on the left and right sides, a rear seat 8 (for example, a bench-type rear seat 8) is mounted on the floor 4, and its seat back 8 b is between the left and right trims 6 and 7. Is arranged.

  The seat belt device 10 of the present invention restrains an occupant seated on the rear seat 8 and is provided in a pair of left and right. 1 is a perspective view of the rear structure 2 of the automobile 1 from the front side in the vehicle, FIG. 2 is a perspective view of the rear structure 2 from the front side of the vehicle in a state where the rear seat 8 of FIG. 1 is excluded, and FIG. 3 is a trim of FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3 and FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 3.

  The pillar 4 includes a pillar inner 4a, a pillar outer 4b, and a pillar reinforcement 4c. The wheel house 5 includes a wheel house inner 5a and a wheel house outer 5b, and an upper portion of the wheel house outer 5b is coupled to the pillar inner 4a. A lower portion of the wheel house outer 5b is coupled to the pillar outer 4b.

  The pillar inner 4a and the wheel house inner 5a are covered by the trims 6 and 7 from the interior 1a side, and between the pillar inner 4a and the wheel house inner 5a and the trims 6 and 7, a part of the seat belt device 10 is accommodated. A storage space 8 is formed. In addition, the code | symbol 6b of FIG. 5 is one of several fasteners which attach the trim 6 to the pillar inner 4a.

  As shown in FIGS. 1 to 5, the seat belt device 10 includes a webbing retractor 11, a shoulder anchor 12, a webbing 13, a belt anchor 14, a tongue 15, a buckle 16, a stopper 17, and the like. The webbing 13 is wound around the webbing take-up device 11 from the base end side, and is urged in the take-up direction by a take-up spring built in the webbing take-up device 11.

  The webbing take-up device 11 and the shoulder anchor 12 are provided on the vehicle outer side (accommodating space 8) than the trims 6 and 7. The webbing take-up device 11 is connected to the take-up device bracket 11a, and is attached to the pillar inner 4a and the wheel house inner 5a through the take-up device bracket 11a. The shoulder anchor 12 is attached to the pillar inner 4a via the fastening member 12a above the webbing take-up device 11 (for example, at the substantially upper position of the upper end of the seat back 8b of the seat 8). In the trim 6, an opening 6 a made of a webbing insertion slit is formed at a portion where the shoulder anchor 12 faces.

  The webbing 13 is led out from the webbing take-up device 11 and extends upward. The webbing 13 is hung on the shoulder anchor 12 and introduced into the vehicle interior 1a through the opening 6a of the trim 6. In detail, the webbing take-up device 10 is not yet installed. When used (hereinafter simply referred to as “unused”), the belt anchor 14 is attached to the front end of the webbing 13 obliquely forward, and the belt anchor 14 is bolted to the floor 3 (or the vicinity of the floor 3) of the vehicle body. 14a is fixed.

  As shown in FIGS. 1 to 7, the tongue 15 has a tongue base portion 15a and a tongue plate 15b protruding from the tongue base portion 15a to the front end side, and a webbing insertion portion 15c is formed at the central portion of the tongue base portion 15a. A portion of the webbing 13 introduced into the vehicle interior 1a is inserted into the webbing insertion portion 15c, and the tongue 15 is movably attached to the webbing 13 via the webbing insertion portion 15c.

  As shown in FIG. 1, the buckle 16 is fixed to the floor 3 of the vehicle body via a buckle anchor (not shown), passes through the seat cushion 8a of the seat 8, and faces above the seat cushion 8a. The tongue 15 (the tongue plate 15b) is attached to and detached from the buckle 16.

The stopper 17 will be described in detail.
As shown in FIGS. 6 and 7, the stopper 17 is provided on the webbing 13, and holds the unused tongue 15 at a height position at which the occupant can easily grasp it (for example, a height position substantially the same as the seat surface of the seat 8). Therefore, the tongue 15 is locked so as to restrict the tongue 15 from moving downward in a state where the tongue 15 is located on the webbing proximal end side with respect to the webbing 13 relative to the stopper 17.

  The stopper 17 has elasticity in the webbing thickness direction, and the tongue 15 locks the tongue 15 without passing through the webbing insertion portion 15c by its own weight. When the stopper 17 receives a force of a certain level or more from the webbing insertion portion 15c of the tongue 15 when relatively moving from the webbing distal end side to the webbing proximal end side rather than 17, the webbing thickness direction contracts. The webbing insertion portion 15c is configured to pass through.

  The stopper 17 is sewn on the webbing 13 with a predetermined (for example, relatively thick nylon) sewing thread that can exhibit elasticity in the webbing thickness direction, and bulges from the webbing 13 to both sides in the webbing thickness direction. The bulge sewing portion 20 is formed, and the bulge sewing portion 20 is connected to the linear sewing portion 21 that is long in the webbing width direction, and is connected to the linear sewing portion 21 and is closer to the front end of the webbing than the linear sewing portion 21. And a plurality of (for example, five) chevron-shaped sewing portions 22 that are juxtaposed in the webbing width direction and pointed toward the front end of the webbing.

  Here, for the webbing insertion portion 15 c of the tongue 15, for example, the length in the webbing width direction is formed to be slightly longer than the width of the webbing 13, and the maximum opening width orthogonal to the webbing width direction is the thickness of the webbing 13. It is formed with a width of about twice as small as that of the above. The tongue 15 has an inclined posture in which the tip end is lowered, and the base end side edge portion 15c1 and the tip end side edge portion 15c2 of the webbing insertion portion 15c are vertically positioned to contact both surfaces of the webbing 13, and the tip end side edge portion 15c2 is in contact. Is stopped by the stopper 17 so as not to move downward with respect to the webbing 13.

  The bulging sewing portion 20 is formed through appropriate stitches by a sewing machine such as a predetermined sewing machine (or hand-sewing is possible), and is elongated in the webbing width direction as a whole, and the center in the webbing width direction is the center. In addition, for example, the length in the webbing width direction of the bulging sewing part 20 is about ½ of the width of the webbing 13 so as to coincide with the center in the width direction of the webbing 13, and the webbing length of the bulging sewing part 20 The width in the direction is about the maximum opening width of the webbing insertion portion 15c, and the total thickness of the webbing 13 and the bulging sewing portion 20 including the thickness of the webbing 13 and the bulging sewing portion 20 is the thickness of the webbing 13. It is formed so as to be about twice as large as.

  For example, the linear sewing portion 21 is formed to have an appropriate width via zigzag stitches (staggered stitches) that are zigzag in the webbing length direction toward the webbing width direction, and the plurality of angle stitches 22 are respectively formed. An appropriate width is formed through zigzag stitches (staggered stitches) that zigzags in the webbing width direction toward the webbing length direction. And the linear sewing part 21 and the several angle-shaped sewing part 22 can also be formed continuously with a sewing machine.

The operation and effect of the seat belt device 10 described above will be described.
When assembling the seat belt device 10, for the parts other than the buckle 16 and its accessories, the webbing 13 led out from the webbing take-up device 11 is hung on the shoulder anchor 12, and the belt anchor 14 is attached to the tip of the webbing 13. With the tongue attached to the webbing 13, the webbing retractor 11 and the shoulder anchor 12 are first attached to the pillar 4 and the wheel house 5 before the trims 6 and 7 are attached.

  Next, it is necessary to pass the trim anchor through which the belt anchor 14, webbing 13, and tongue 15 are passed through the opening 6 a of the trim 6. While holding the front trim 6, the belt anchor 14, the webbing 13, and the tongue 15 are sequentially passed through the opening 6 a of the trim 6 with the other hand, and then the belt anchor 14 is moved to the floor 3 (or floor 3) of the vehicle body. The trim 6 is also mounted.

  According to this seat belt device 10, the stopper 17 has elasticity in the webbing thickness direction, and the tongue 15 locks the tongue 15 without passing through the webbing insertion portion 15c by its own weight, and at least when assembled. When the tongue 17 is moved relative to the webbing 13 from the webbing distal end side to the webbing proximal end side relative to the stopper 17, the stopper 17 receives a certain force from the webbing insertion portion 15 c of the tongue 15. The webbing is shrunk in the webbing thickness direction and passes through the webbing insertion portion 15c.

  That is, at the time of assembly, as shown by a virtual line in FIG. 7, the tongue 15 is positioned on the front end side of the webbing with respect to the webbing 13, and the tongue 15 is moved along the webbing 13 to move away from the belt anchor 14. , The belt anchor 14 and the tongue 15 can be continuously and smoothly passed through the opening 6a of the trim 6 together with the webbing 13, so that the load of the trim opening passing work can be reduced. Can be reduced.

  Thereafter, the tongue 15 is moved relative to the webbing 13 from the webbing distal end side to the webbing proximal end side with respect to the stopper 17, and at that time, the stopper 17 applies a certain force from the webbing insertion portion 15 c of the tongue 15. When received, it contracts in the webbing thickness direction and passes through the webbing insertion portion 15c, and then the stopper 17 expands and returns in the webbing thickness direction, and the belt anchor 14 is fixed to the floor 3 (or its vicinity) of the vehicle body. In this state, in order to hold the unused tongue 15 at a height where it is easy for an occupant to grip, the stopper 17 can be securely locked so as not to move downward with respect to the webbing 13. Thus, the assemblability (productivity of the automobile 1) is improved, and the opening 6a is reduced to achieve the above effect. It is possible to prevent the deterioration example.

  In addition, the stopper 17 includes the bulging sewing portion 20 that is formed on the webbing 13 with a predetermined sewing thread so as to bulge from the webbing 13 in the webbing thickness direction. With the simple structure of 20, the shrinkage / expansion in the webbing thickness direction and the original stopper function can be surely exhibited during the operation of passing the trim opening portion of the bulging sewing portion 20 through.

  Further, the bulging sewing portion 20 includes a linear sewing portion 21 that is long in the webbing width direction, and a plurality of chevron shapes that are juxtaposed in the webbing width direction on the front end side of the webbing with respect to the linear sewing portion 21 and pointed toward the front end side of the webbing. Since the sewing part 22 is provided, the linear sewing part 21 normally holds the tongue 15 securely, and the tongue 15 is attached to the webbing 13 from the front end side of the webbing to the webbing 13 than the stopper 17 when assembled. When the webbing insertion portion 15c of the tongue 15 is moved relative to the webbing, first, the webbing tip side end portions of the plurality of angle-shaped sewing portions 22 are contracted in the webbing thickness direction, and this can be easily performed. Therefore, the plurality of angle-shaped sewing portions 22 are surely contracted in the webbing thickness direction sequentially from the webbing distal end side to the webbing proximal end side, and then the linear sewing portion 21 is retracted. Bing by reliably contracted in the thickness direction, bulge sewn portion 20 can pass through the webbing insertion portion 15c of the tongue 15 smoothly. With respect to the plurality of chevron-shaped sewing portions 22, a function of reinforcing the linear sewing portion 21 that locks the tongue 15 from the front end side of the webbing can also be expected.

  Since the opening 6a of the trim 6 is a webbing insertion slit formed in the main body of the trim 6, the trim opening 6a is provided without providing a separate bezel or the like, that is, suppressing an increase in cost. The (slit) can be reduced to improve the assemblability, and deterioration of the appearance of the interior 1a can be prevented.

  In addition, various bulging sewing parts can be used instead of the bulging sewing part 20. For example, the bulging sewing portion 20A shown in FIG. 8 includes only one linear sewing portion 21, and the bulging sewing portion 20B shown in FIG. 9 includes two linear sewing portions 21 arranged in parallel in the webbing length direction. It consists of Further, for example, the bulging sewing portion 20C in FIG. 10 includes a linear sewing portion 21 and a plurality (for example, three) of a plurality of (for example, three) portions extending from the linear sewing portion 21 to the webbing tip side and arranged in parallel in the webbing width direction. 11 has a short linear sewing portion 23, and the bulging sewing portion 20D of FIG. 11 is configured by only a plurality of short linear sewing portions 23, omitting the linear sewing portion 21 of FIG.

  The seat belt apparatus 10A according to the second embodiment is obtained by changing the stopper 17 of the seat belt apparatus 10 according to the first embodiment, and other configurations are the same as those in the first embodiment. As shown in FIGS. 12 and 13, the stopper 17 </ b> A of the seat belt device 10 </ b> A is provided on the webbing 13 as in the stopper 17 of the first embodiment, has elasticity in the webbing thickness direction, and has its own weight of the tongue 15. Then, the tongue 15 is locked without passing through the webbing insertion portion 15c, and at the time of assembly, the tongue 15 is moved relative to at least the webbing 13 from the webbing distal end side to the webbing proximal end side rather than the stopper 17A. When the stopper 17A receives a force of a certain level or more from the webbing insertion portion 15c of the tongue 15, the stopper 17A contracts in the webbing thickness direction and passes through the webbing insertion portion 15c.

  The stopper 17A is a resin plate member that has a taper portion 31 that is thickened in the webbing thickness direction toward the webbing base end side by a synthetic resin or rubber that is fixed to the webbing 13 and can exhibit elasticity in the webbing thickness direction. 30. The resin plate member 30 is fixed to the webbing 13 by a plurality of (for example, two) fasteners 32 at a plurality of portions (for example, two locations separated in the webbing width direction). In this case, the resin plate member 30 is disposed in contact with the surface of the webbing 13 on the side where the front end side edge 15c2 of the webbing insertion portion 15c of the tongue 15 faces, and each fastener 32 is provided from the opposite surface. Are fixed to the resin plate member 30 through pin holes 13 a formed in the webbing 13.

  The resin plate member 30 is elongated in the webbing width direction, the center of the webbing width direction coincides with the center of the webbing 13 in the width direction, and the length of the resin plate member 30 in the webbing width direction is, for example, The width in the webbing length direction of the resin plate member 30 is larger than the maximum opening width of the webbing insertion portion 15c, and the thickness of the webbing 13 and the resin plate member The body thickness of the webbing 13 and the resin plate member 30 including the maximum thickness of 30 is formed to be about twice the thickness of the webbing 13.

  According to this seat belt device 10A, the stopper 17A is composed of the resin plate member 30 that is fixed to the webbing 13 and has the taper portion 31 that increases in the webbing thickness direction toward the webbing proximal end side. The webbing proximal end of the member 30 securely locks the tongue 15, and when assembling, the tongue 15 is moved relative to the webbing 13 from the webbing distal end side to the webbing proximal end side rather than the stopper 17 </ b> A. The webbing insertion portion 15c of the tongue 15 surely contracts the taper portion 31 in the webbing thickness direction sequentially from the webbing distal end side to the webbing proximal end side, so that the resin plate member 30 smoothly passes through the webbing insertion of the tongue 15. It can pass through the part 15c.

  Moreover, since the resin plate member 30 is fixed to the webbing 13 at a plurality of portions by the plurality of fasteners 32, the resin plate member 30 is securely fixed by being prevented from rotating around the webbing 13. The shrinkage / expansion in the webbing thickness direction and the original stopper function can be reliably performed during the trim opening passing operation. Other effects are the same as those of the first embodiment.

  Various resin plate members 30 can be used instead of the resin plate member 30. For example, the resin plate member 30A of FIG. 14 is formed in a button shape having a tapered portion 31A in the vicinity of the outer periphery. In this case, the resin plate member 30A is fixed to the webbing 13 with one fastener 32A and does not stop. Can function. A plurality of resin plate members 30A may be provided side by side in the webbing width direction. Further, the resin plate member 30B of FIG. 15 is formed in a simple plate shape having no tapered portion.

  In addition, various modifications can be added without departing from the spirit of the present invention, and the seatbelt device for the present invention can be applied to a seatbelt for a rear seat as in the present embodiment. The present invention is not limited to the device, and can be applied to various seat belt devices equipped in an automobile such as a seat belt device for a front seat.

It is a perspective view from the vehicle front side of the rear part structure of a motor vehicle. FIG. 2 is a perspective view of the rear structure from the front side in the vehicle with the rear seat of FIG. 1 removed. FIG. 3 is a perspective view from the front side in the vehicle of the rear structure with the trim of FIG. 2 removed. It is the IV-IV sectional view taken on the line of FIG. FIG. 5 is a cross-sectional view taken along line V-V in FIG. 3. It is a side view of the principal part containing the webbing and tongue of Example 1. It is the VII-VII sectional view taken on the line of FIG. FIG. 7 is a view corresponding to FIG. 6 of a first modification of the first embodiment. FIG. 7 is a diagram corresponding to FIG. 6 of a second modification of the first embodiment. FIG. 7 is a view corresponding to FIG. 6 of a third modification of the first embodiment. FIG. 7 is a view corresponding to FIG. 6 of a fourth modification of the first embodiment. FIG. 7 is a diagram corresponding to FIG. It is the XIII-XIII sectional view taken on the line of FIG. FIG. 13 is a view corresponding to FIG. 12 of a first modification of the second embodiment. FIG. 14 is a diagram corresponding to FIG. 13 of a second modification of the second embodiment.

Explanation of symbols

1 Car 1a Interior 3 Floor 6, 7 Trim 6a Opening (slit)
10, 10A Seat belt device 11 Webbing retractor 12 Shoulder anchor 13 Webbing 14 Belt anchor 15 tongue 15c Webbing insertion part 17, 17A Stopper 20, 20A, 20B, 20C, 20D Swelling sewing part 21 Linear sewing part 22 Angle sewing Part 30, 30A, 30B resin plate member 31 taper part 32, 32A

Claims (6)

A webbing take-up device and a shoulder anchor provided on the outer side of the trim facing the inside of the automobile, and introduced from the webbing take-up device to the shoulder anchor and introduced into the vehicle through an opening formed in the trim. A webbing extending downward, a belt anchor attached to the front end of the webbing and fixed to the floor of the vehicle body or its vicinity, and a webbing insertion part through which the webbing is inserted, are movably mounted on the webbing via the webbing insertion part. And a tongue that is attachable to and detachable from a buckle connected to the vehicle body side, and a seat belt device for an automobile that includes a stopper that is provided on the webbing and that restrains the tongue from moving downward relative to the webbing. In
The stopper has elasticity in the webbing thickness direction, and locks the tongue without passing through the webbing insertion portion under its own weight,
When assembling the tongue at least relative to the webbing from the webbing distal end side to the webbing proximal end side relative to the webbing, when the stopper receives a certain force from the webbing insertion part of the tongue An automobile seat belt device configured to shrink in the webbing thickness direction and pass through the webbing insertion portion.   2. The automobile seat according to claim 1, wherein the stopper includes a bulging sewing portion that is formed on the webbing with a predetermined sewing thread so as to bulge from the webbing in the webbing thickness direction. Belt device.   The bulging sewing portion includes a linear sewing portion that is long in the webbing width direction, and a plurality of angle-shaped sewing portions that are juxtaposed in the webbing width direction on the front end side of the webbing with respect to the linear sewing portion and pointed to the front end side of the webbing. The vehicle seat belt device according to claim 2, wherein the vehicle seat belt device is provided.   2. The seat belt device for an automobile according to claim 1, wherein the stopper is formed of a resin plate member that is fixed to the webbing and has a tapered portion that increases in the webbing thickness direction toward the webbing base end side.   The automobile seat belt device according to claim 4, wherein the resin plate member is fixed to the webbing at a plurality of portions by a plurality of fasteners.   The seat belt device for an automobile according to any one of claims 1 to 5, wherein the opening comprises a webbing insertion slit formed in a main body of the trim.