JP2014051236A - Seat belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt device having no influence on extraction performance of webbing in ordinary time, by preventing occurrence of jamming in an emergency.SOLUTION: The seat belt device is provided for restricting an occupant of a vehicle to a seat, and comprises a belt-like webbing 104 and a through-anchor 108 installed on a wall part in a cabin and inserting the webbing 104, and the through-anchor 108 has an insertion hole 118 for inserting the webbing 104, and a lower edge 122 of the insertion hole 118 is made of at least resin, and the webbing 104 slides when using the webbing 104, and the webbing 104 has projection parts L1 and L2 continuing in a longitudinal direction of the webbing 104 in a predetermined position in a width direction of a range for contacting with the lower edge 122.

Description

  The present invention relates to a seat belt device for restraining an occupant to a seat using webbing.

  A seat belt device is installed in the seat of the vehicle. The seat belt device is a safety device for preventing a passenger from jumping forward due to inertial force when a large deceleration is applied to the vehicle due to a sudden stop or a collision. The seat belt device restrains an occupant to a seat using belt-shaped webbing. The webbing is housed in a retractor installed on the side of the seat on the base side, and the tip side is drawn upward from the retractor and passed through a through anchor on the vehicle interior wall. Then, the webbing that has passed through the through anchor is folded downward, passed through a detachable tongue plate, and then fixed to the anchor plate near the floor.

  The current seat belt device has been devised in various ways so that its safety performance does not deteriorate. For example, when the webbing is suddenly pulled, there is a phenomenon called “jamming” in which the webbing is shifted to the end of the through-hole of the through anchor. When such jamming occurs, the webbing pull-out performance is degraded. Therefore, in Patent Document 1, for example, a plurality of convex portions called “projections” are provided at the lower edge in the insertion hole of the through anchor (referred to as a guide anchor in Patent Document 1). Yes. This protrusion is configured to come into contact with the edge of the webbing when the webbing is pulled strongly and the through anchor tilts, thereby preventing jamming by preventing movement of the webbing in the width direction.

JP 2003-89345 A

  As described above, jamming occurs when the webbing is suddenly pulled in an emergency, for example, when a pretensioner (winding device) or an energy absorption mechanism (a mechanism that relaxes rapid restraint due to webbing) is activated. This is a possible phenomenon. For this reason, it is desirable that the jamming prevention measures not affect the performance (drawability) when pulling out the webbing in a normal state.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a seat belt device that prevents jamming in an emergency and does not affect webbing pull-out properties in a normal state.

  In order to solve the above problems, a representative configuration of a seat belt device according to the present invention is a seat belt device that restrains a vehicle occupant to a seat, and is attached to a belt-like webbing and a wall portion in a vehicle interior. A through anchor through which the webbing is inserted, and the through anchor has an insertion hole through which the webbing is inserted. The lower edge of the insertion hole is made of at least resin, and the webbing slides when the webbing is used. The moving webbing is characterized by having a concave portion or a convex portion continuous in the longitudinal direction of the webbing at a predetermined position in the width direction in a range in contact with the lower edge.

  According to the above configuration, in an emergency, for example, when a pretensioner or the like is activated and the webbing is pulled out rapidly, strong friction occurs between the lower edge of the through-anchor insertion hole and the webbing, and the resin on the lower edge is Sharpen (dissolve). However, if the webbing is provided with a recess, the recess is less likely to contact the lower edge. Therefore, the resin at the part in contact with the recess has a scraping amount (dissolution amount) compared to the part in contact with the region other than the recess. Get smaller. Accordingly, an uneven shape (particularly a convex shape) appears at the lower edge of the insertion hole. This uneven shape prevents the webbing from moving in the width direction in the insertion hole, thereby preventing jamming. Further, since these uneven shapes serve as a guide, the webbing can be more easily pulled out in the longitudinal direction and the pulling-out property is improved.

  In addition, when the webbing is provided with a convex portion, the convex portion comes into contact with the lower edge of the insertion hole more strongly, so that much of the resin on the lower edge is shaved. As a result, a concave shape appears at the lower edge of the insertion hole. And since the convex part of a webbing follows the concave shape of a lower edge, the webbing is prevented from moving in the width direction within an insertion hole, and jamming is prevented. Further, along these, it serves as a guide for pulling out the webbing, and the pulling-out property of the webbing from the insertion hole is improved.

  The convex shape and concave shape at the lower edge of these through anchors appear only when a strong force is applied to the webbing in an emergency or the like, so that it does not affect the pull-out property of the webbing at normal times and is suitable. .

  The webbing has a recess, and the webbing is a knitted fabric including a weft in the width direction and a warp in the longitudinal direction, and the recess may have a warp that is thinner than yarns in other regions. According to this structure, it becomes possible to implement | achieve a recessed part suitably on webbing.

  The webbing may have a convex portion, and the webbing may be a knitted fabric including a weft yarn in the width direction and a warp yarn in the longitudinal direction, and the convex portion may have a warp yarn that is thicker than yarns in other regions. According to this, it becomes possible to implement | achieve a convex part suitably on webbing.

  The webbing is a knitted fabric knitted in a predetermined pattern, and the concave portion or the convex portion may have a pattern different from other regions. Also with this configuration, it is possible to suitably realize the concave portion or the convex portion on the webbing.

  In order to solve the above-described problems, another typical configuration of the seat belt device according to the present invention is a seat belt device that restrains a vehicle occupant to a seat, and includes a belt-like webbing and a wall portion in a vehicle interior. And a through anchor through which the webbing is inserted. The through anchor has an insertion hole through which the webbing is inserted, and a lower edge of the insertion hole is made of at least resin, and the webbing is used when the webbing is used. The webbing has a low friction region along the longitudinal direction of the webbing at a predetermined position in the width direction in a range in contact with the lower edge, and the webbing includes a weft in the width direction and a warp in the longitudinal direction. The knitted fabric is characterized in that the low friction region has warp yarns having a lower coefficient of friction against the resin at the lower edge than yarns in other regions.

  According to the said structure, a low friction area | region can be provided suitably in webbing. In the low friction region, when the webbing is pulled out suddenly in an emergency, the resin at the lower edge of the insertion hole is not sharpened compared to other regions. As a result, a concavo-convex shape (particularly a convex shape) appears along the width direction of the webbing at the lower edge of the insertion hole. This uneven shape prevents the webbing from moving in the width direction of the webbing in the insertion hole, thereby preventing jamming. Further, since the uneven shape serves as a guide, the webbing is more easily pulled out in the longitudinal direction. Since this uneven shape appears only in an emergency, it is preferable that it does not affect the pull-out property of the webbing at normal times.

  Hereinafter, it is assumed that the “friction coefficient” includes both constants of the dynamic friction coefficient and the static friction coefficient. For example, the above-mentioned “warp yarn having a low friction coefficient” will be described in detail, meaning that the dynamic friction coefficient or the static friction coefficient with respect to the resin on the lower edge is lower than the yarns in other regions on the webbing.

  In order to solve the above-described problems, another typical configuration of the seat belt device according to the present invention is a seat belt device that restrains a vehicle occupant to a seat, and includes a belt-like webbing and a wall portion in a vehicle interior. And a through anchor through which the webbing is inserted. The through anchor has an insertion hole through which the webbing is inserted, and a lower edge of the insertion hole is made of at least resin, and the webbing is used when the webbing is used. The webbing has a high friction region along the longitudinal direction of the webbing at a predetermined position in the width direction in a range in contact with the lower edge, and the webbing includes a weft in the width direction and a warp in the longitudinal direction. The knitted fabric is characterized in that the high friction region has warp yarns having a higher coefficient of friction against the resin at the lower edge than yarns in other regions.

  If it is the said structure, a high friction area | region can be provided suitably in webbing. In the high friction region, when the webbing is suddenly pulled out in an emergency, a large amount of resin on the lower edge of the insertion hole is shaved compared to other regions. As a result, an uneven shape appears along the width direction of the webbing at the lower edge of the insertion hole. The uneven shape prevents the webbing from moving in the width direction of the webbing in the insertion hole, thereby preventing jamming. Further, since the uneven shape serves as a guide, the webbing is more easily pulled out in the longitudinal direction. Since this uneven shape appears only in an emergency, it is preferable that it does not affect the pull-out property of the webbing at normal times.

  In order to solve the above-described problems, another typical configuration of the seat belt device according to the present invention is a seat belt device that restrains a vehicle occupant to a seat, and includes a belt-like webbing and a wall portion in a vehicle interior. And a through anchor through which the webbing is inserted. The through anchor has an insertion hole through which the webbing is inserted, and a lower edge of the insertion hole is made of at least resin, and the webbing is used when the webbing is used. The webbing has a low friction region or other region whose coefficient of friction with respect to the resin on the lower edge is lower than the other region along the longitudinal direction of the webbing at a predetermined position in the width direction in a range in contact with the lower edge. It has a high friction area where the coefficient of friction against the resin at the lower edge is higher than the area, and the webbing is a knitted fabric knitted in a predetermined pattern, and the low friction area or the high friction area is another area. Characterized in that it has a different pattern.

  According to the said structure, a low friction area | region or a high friction area | region can be provided suitably in webbing. Due to the low friction area and the high friction area, when the webbing is abruptly pulled out, there is a difference in the amount of resin scraped at the lower edge of the insertion hole. As a result, the lower edge has an uneven shape along the width direction of the webbing. appear. Due to the uneven shape, the webbing is prevented from moving in the width direction in the insertion hole, and jamming is prevented. Further, since the uneven shape serves as a guide, the webbing is more easily pulled out in the longitudinal direction. Since this uneven shape appears only in an emergency, it is preferable that it does not affect the pull-out property of the webbing at normal times.

  According to the present invention, it is possible to provide a seat belt device that prevents jamming during an emergency and does not affect the pull-out property of the webbing during a normal time.

It is the figure which illustrated the seatbelt apparatus concerning embodiment of this invention. It is an enlarged view of the webbing of FIG. It is the figure which illustrated the mode of contact with the lower edge of the through anchor of FIG. 1, and webbing. It is the figure which illustrated each modification of webbing illustrated in Drawing 2 (b). It is the figure which illustrated the mode of contact with the webbing of FIG.4 (b), and the lower edge of a through anchor. It is the figure which illustrated webbing of the seatbelt apparatus concerning 2nd Embodiment. It is the figure which illustrated the mode of contact with the webbing of FIG.5 (b), and the lower edge of a through anchor. It is the figure which illustrated the modification of the webbing of FIG. It is the figure which illustrated the mode of contact with the webbing of FIG.8 (b), and the lower edge of a through anchor.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a diagram illustrating a seat belt device 100 according to an embodiment of the present invention. As illustrated in FIG. 1, the seat belt device 100 is a safety device provided in the seat 102, and restrains an occupant to the seat 102 using a belt-like webbing 104. The seat belt device 100 includes a pretensioner (not shown) that rapidly winds the webbing 104 in a vehicle emergency. In addition, an energy absorption mechanism (EA mechanism) that relaxes the rapid restraint of the webbing 104 is provided as necessary.

  The webbing 104 is wound around the retractor 106 at the base side, and the tip side is folded downward through the upper through anchor 108 and fixed to the anchor plate 110. A tongue plate 112 is provided between the through anchor 108 and the anchor plate 110, and the occupant inserts the tongue plate 112 into the buckle 114 to be put on.

  The through anchor 108 is attached to a center pillar 116 which is a part of a wall portion in the vehicle interior. The through anchor 108 is provided with an insertion hole 118, and the webbing 104 is passed through the insertion hole 118. The through anchor 108 is attached to the center pillar 116 by a bolt 120 and can move so as to rotate in the vehicle front-rear direction around the bolt 120.

  In the seat belt device 100, the webbing 104 is mainly provided with a unique configuration so that jamming (reduction of the webbing 104 being offset in the insertion hole 118 of the through anchor 108) can be prevented.

  FIG. 2 is an enlarged view of the webbing 104 of FIG. FIG. 2A is an enlarged view of a portion A in FIG. As illustrated in FIG. 2A, the webbing 104 is provided with convex portions L <b> 1 and L <b> 2 at two locations in the width direction continuously along the longitudinal direction. FIG.2 (b) is BB sectional drawing of Fig.2 (a). As illustrated in FIG. 2B, the convex portions L <b> 1 and L <b> 2 protrude with an increased thickness compared to other regions.

  As illustrated in FIG. 2A, in the seat belt device 100, the webbing 104 is a knitted fabric including a weft yarn 104a in the width direction and a warp yarn 104b in the longitudinal direction. And convex part L1 * L2 is implement | achieved by weaving the warp yarn 140 thicker than each thread | yarn of another area | region. In the present embodiment, these convex portions L1 and L2 are provided in a range that can pass through the insertion hole 118 of the through anchor 108 at least when the seat belt device 100 is worn by the occupant in the webbing 104.

  FIG. 3 is a diagram illustrating a state of contact between the lower edge 122 of the through anchor 108 of FIG. 1 and the webbing 104. In FIG. 3A, the through anchor 108 and the webbing 104 are illustrated as partial longitudinal sections. As illustrated in FIG. 3A, the webbing 104 is in contact with the lower edge 122 of the insertion hole 118 of the through anchor 108 and is slid out on the lower edge 122.

  The through anchor 108 is formed so as to cover a metal insert fitting 124 by, for example, molding a resin 126 (for example, PA, POM, ABS, PP, etc.). When the webbing 104 is suddenly pulled out in an emergency (for example, when a pretensioner or an energy absorbing mechanism (EA mechanism) is operated in the retractor 106 (see FIG. 1)), the resin covering the lower edge 122 of the through anchor 108 A strong friction is generated between the web 126 and the webbing 104, whereby the resin 126 is scraped or melted by the frictional heat. At this time, the webbing 104 is provided with convex portions L1 and L2 protruding from other regions. Since the convex portions L1 and L2 are more in contact with the lower edge 122 of the insertion hole 118 than in other regions, as illustrated in FIG. 3B, more resin 126 is in contact with the convex portions L1 and L2. You can sharpen. As a result, concave shapes 142a and 142b appear on the lower edge 122, and the lower edge 122 has an uneven shape as a whole.

  Thus, when the concave shapes 142a and 142b appear on the lower edge 122, the convex portions L1 and L2 of the webbing 104 slide along the concave shapes 142a and 142b. Further, since the convex portions L1 and L2 of the webbing 104 are along the concave shapes 142a and 142b of the lower edge 122, the webbing 104 is prevented from moving in the width direction in the insertion hole 118, and jamming is prevented from occurring. . In addition, since the uneven shape of the lower edge 122 serves as a guide for the webbing 104, the webbing 104 can be more easily pulled out in the longitudinal direction and the pull-out property is improved. Further, since the concave shapes 142a and 142b of the lower edge 122 of the through anchor 108 appear only when a strong force is applied to the webbing 104 in an emergency or the like, it is usually flat and has no influence on the drawability of the webbing 104. Is also preferable.

  In the configuration of the present embodiment, the concave shapes 142a and 142b can be formed along the pulling direction of the webbing 104. In other words, even if the usage environment (vehicle type or in-vehicle layout) differs, the concave shape according to each situation Can be formed. Therefore, compared with the case where the concave shape is provided in advance, there is no difference in the jamming prevention effect even if the use environment is different. Therefore, it is not necessary to change the specifications of the seat belt device 100 according to the vehicle type. Further, in the components other than the webbing 104, the basic configuration of the conventional product can be diverted. Therefore, the versatility of the seat belt device 100 is very high, and the obtained economic effect is remarkable.

(Modification)
FIG. 4 is a diagram illustrating each modification of the webbing 104 illustrated in FIG. FIG. 4A illustrates a webbing 200 that is a first modification. The webbing 200 is provided with convex portions L3 as in the webbing 104 of FIG. 2B, but the number of the convex portions L1 is one. Even with this configuration, the resin 126 on the lower edge 122 of the through anchor 108 shown in FIG. 3A can be scraped to form a concave shape to prevent jamming and improve the pull-out property. In addition, there is no restriction | limiting in the number which provides a convex part, Furthermore, it is also possible to provide multiple.

  FIG. 4B illustrates a webbing 210 that is a second modification. The webbing 210 is different from the webbing having the convex portions of FIG. 2B and FIG. 4A, and has concave portions M1 and M2 at two places in the width direction. The recesses M1 and M2 can be realized by using a thread that is thinner than the threads in other regions, instead of the warp thread 140 in FIG.

  FIG. 5 is a view exemplifying a state of contact between the webbing 210 of FIG. 4B and the lower edge 122 of the through anchor 108. Since the recesses M1 and M2 of the webbing 210 are difficult to contact with the lower edge 122 of the through anchor 108, the resin 126 at the portion in contact with the recesses M1 and M2 is scraped in comparison with the portion in contact with the region other than the recess ( (Dissolution amount) becomes small. Therefore, convex shapes 212a and 212b appear on the lower edge 122 of the portion. When viewed as a whole, the lower edge 122 has an uneven shape. This uneven shape also prevents jamming because the webbing 210 is prevented from moving in the width direction within the insertion hole 118. Further, since these uneven shapes serve as a guide, the webbing 210 can be more easily pulled out in the longitudinal direction and the pull-out property is improved.

  FIG. 4C illustrates a webbing 220 that is a third modification. The webbing 220 has recesses M3 as in the webbing 210 of FIG. 4B, but the number thereof is one. Even with this configuration, it is possible to produce a concavo-convex shape on the lower edge 122 of the through anchor 108 in FIG. 5 to prevent jamming and improve the pull-out property. In addition, this recessed part M3 is realizable by using a thin warp. Moreover, there is no restriction | limiting in the number which provides a recessed part, Furthermore, it is also possible to provide multiple.

  In each of the modified examples described above, for example, the convex portions L1 and L2 in FIG. 2B and the concave portions M1 and M2 in FIG. 4B are set by arbitrarily setting the thickness of the warp. Realized. However, the realization method is not limited to this. The webbing of each modification is a knitted fabric and is knitted in a predetermined pattern. The convex portions L1 and L2 and the concave portions M1 and M2 can be realized, for example, by changing the pattern of the yarn at that location.

(Second Embodiment)
FIG. 6 is a diagram illustrating the webbing 302 of the seat belt device 300 according to the second embodiment. The seat belt device 300 includes a webbing 302 having a configuration significantly different from the webbing 104 of the seat belt device 100 of FIG. Since the configuration other than the webbing 302 may be the same as that of the seat belt device 100 in FIG. 1, the illustration is omitted.

  FIG. 6A is a partially enlarged view of the webbing 302. The webbing 302 has low friction regions N1 and N2 at predetermined positions in the width direction in a range in contact with the lower edge 122 of the through hole 118 of the through anchor 108 (see FIG. 3A). The low friction regions N1 and N2 are provided along the longitudinal direction of the webbing 302. This webbing 302 is also a knitted fabric with a weft yarn 302a in the width direction and a warp yarn 302b in the longitudinal direction in a predetermined pattern. 6B is a cross-sectional view taken along the line C-C in FIG. 6A. As illustrated in FIG. 6B, the low friction regions N1 and N2 have a knitting pattern on the surface side of the webbing 302. It can be realized by making it different.

  FIG. 7 is a view illustrating the state of contact between the webbing 302 and the lower edge 122 of the through anchor 108 in FIG. In the low friction areas N1 and N2, when the webbing 302 is suddenly pulled out by a pretensioner or the like in an emergency, the resin 126 on the lower edge 122 of the insertion hole 118 is shaved much compared to other areas on the webbing 302. Absent. As a result, convex shapes 304 a and 304 b appear on the lower edge 122 of the insertion hole 118, and become concave and convex along the width direction of the webbing 302 on the lower edge 122. This uneven shape prevents the webbing 302 from moving in the width direction of the webbing 302 in the insertion hole 118, thereby preventing jamming. Further, since the uneven shape serves as a guide, the webbing 302 is more easily pulled out in the longitudinal direction. Since this uneven shape appears only when a strong force is applied to the webbing 302 in an emergency or the like, it is preferable that it does not affect the pull-out property of the webbing 302 in normal times.

  The method for realizing the low friction areas N1 and N2 in the webbing 302 is not limited to changing the knitting pattern. For example, the low friction regions N1 and N2 can also be realized by using warp yarns having a lower friction coefficient with respect to the resin 126 than yarns in other regions on the webbing 302 in FIG. This “friction coefficient” includes any constant of a dynamic friction coefficient (further, a sliding friction coefficient or a rolling friction coefficient) and a static friction coefficient. Further, in this case, the comparison of the friction coefficients (for example, the comparison of the friction coefficients between the warp yarns and the yarns in other regions) is performed by comparing the values of the same types of friction coefficients such as dynamic friction coefficients or static friction coefficients.

(Modification)
FIG. 8 is a diagram illustrating a modification of the webbing 302 in FIG. FIG. 8A is a partially enlarged view of a webbing 310 which is a modified example. The webbing 310 has high friction regions O1 and O2 at predetermined positions in the width direction in a range in contact with the lower edge 122 of the insertion hole 118 of the through anchor 108 (see FIG. 7). The high friction regions O1 and O2 are provided along the longitudinal direction of the webbing 310. The webbing 310 is also a knitted fabric in which weft yarns 310a in the width direction and warp yarns 310b in the longitudinal direction are knitted in a predetermined pattern. FIG. 8B is a sectional view taken along the line DD in FIG. 8A. As illustrated in FIG. 8B, the high friction regions O1 and O2 are knitted patterns on the surface side of the webbing 310. It can be realized by making it different.

  FIG. 9 is a diagram illustrating a state of contact between the webbing 310 of FIG. 8B and the lower edge 122 of the through anchor 108. In the high friction regions O1 and O2, when the webbing 310 is suddenly pulled out in an emergency, a large amount of the resin 126 on the lower edge 122 of the insertion hole 118 is shaved compared to other regions. As a result, an uneven shape appears along the width direction of the webbing 310 at the lower edge 122 of the insertion hole 118. The uneven shape prevents the webbing 310 from moving in the width direction of the webbing 310 in the insertion hole 118, thereby preventing jamming. In addition, since the uneven shape serves as a guide, the webbing 310 can be easily pulled out in the longitudinal direction. Since this uneven shape appears only in an emergency, it is preferable since it does not affect the pull-out property of the webbing 310 in a normal state.

  The method for realizing the high friction regions O1 and O2 in the webbing 310 is not limited to changing the knitting pattern. For example, the high friction regions O1 and O2 can also be realized by using warp yarns having a higher friction coefficient (including dynamic friction coefficient and static friction coefficient) with respect to the resin 126 than yarns in other regions in FIG. 8A. It is. That is, in the high friction regions O1 and O2, the warp yarn having a higher dynamic friction coefficient with respect to the resin 126 of the lower edge 122 than the yarn of other regions, or the static friction coefficient with respect to the resin 126 of the lower edge 122 is compared with the yarns of other regions. This can be realized by using a high warp.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a seat belt device that restrains an occupant to a seat using webbing.

L1 to L3 ... convex part, M1 to M3 ... concave part, N1 and N2 ... low friction area, O1 and O2 ... high friction area, 100 ... seat belt device of the first embodiment, 102 ... seat, 104 ... webbing, 104a ... Weft, 104b ... Warp, 106 ... Retractor, 108 ... Through anchor, 110 ... Anchor plate, 112 ... Tang plate, 114 ... Buckle, 116 ... Center pillar, 118 ... Insertion hole, 120 ... Bolt, 122 ... Lower edge of the insertion hole , 124 ... Insert metal fittings, 126 ... Resin, 140 ... Convex warp, 142a and 142b ... Concave shape of the lower edge, 200, 210, and 220 ... Webbing of the modification of the first embodiment, 212a and 212b ... in the modification Convex shape of lower edge, 300 ... seat belt device of second embodiment, 302 ... webin , 302a ... weft, 302b ... warp convex shape of 304a · 304b ... lower edge, 310 ... webbing modification of the second embodiment, 310a ... weft, 310b ... warp

Claims (7)

A seat belt device for restraining a vehicle occupant to a seat,
Strip webbing,
A through anchor that is attached to the wall of the vehicle interior and through which the webbing is inserted;
With
The through anchor has an insertion hole through which the webbing is inserted,
The lower edge of the insertion hole is made of at least resin, and the webbing slides during use of the webbing,
The seat belt device according to claim 1, wherein the webbing has a concave portion or a convex portion continuous in a longitudinal direction of the webbing at a predetermined position in a width direction in a range in contact with the lower edge. The webbing has the recess,
The webbing is a knitted fabric including a weft in the width direction and a warp in the longitudinal direction,
The seat belt device according to claim 1, wherein the concave portion has a warp thread that is thinner than a thread in another region. The webbing has the convex part,
The webbing is a knitted fabric including a weft in the width direction and a warp in the longitudinal direction,
The seat belt device according to claim 1, wherein the convex portion has a warp thread that is thicker than a thread in another region. The webbing is a knitted fabric knitted in a predetermined pattern,
The seat belt device according to claim 1, wherein the concave portion or the convex portion has a pattern different from other regions. A seat belt device for restraining a vehicle occupant to a seat,
Strip webbing,
A through anchor that is attached to the wall of the vehicle interior and through which the webbing is inserted;
With
The through anchor has an insertion hole through which the webbing is inserted,
The lower edge of the insertion hole is made of at least resin, and the webbing slides during use of the webbing,
The webbing has a low friction region along a longitudinal direction of the webbing at a predetermined position in a width direction in a range in contact with the lower edge,
The webbing is a knitted fabric including weft yarns in the width direction and warp yarns in the longitudinal direction, wherein the low friction region has warp yarns having a lower coefficient of friction against the resin in the lower edge than yarns in other regions. Seat belt device. A seat belt device for restraining a vehicle occupant to a seat,
Strip webbing,
A through anchor that is attached to the wall of the vehicle interior and through which the webbing is inserted;
With
The through anchor has an insertion hole through which the webbing is inserted,
The lower edge of the insertion hole is made of at least resin, and the webbing slides during use of the webbing,
The webbing has a high friction region along a longitudinal direction of the webbing at a predetermined position in a width direction in a range in contact with the lower edge,
The webbing is a knitted fabric including weft yarns in the width direction and warp yarns in the longitudinal direction, wherein the high friction region has warp yarns having a higher coefficient of friction against the resin at the lower edge than yarns in other regions. Seat belt device. A seat belt device for restraining a vehicle occupant to a seat,
Strip webbing,
A through anchor that is attached to the wall of the vehicle interior and through which the webbing is inserted;
With
The through anchor has an insertion hole through which the webbing is inserted,
The lower edge of the insertion hole is made of at least resin, and the webbing slides during use of the webbing,
The webbing is a low-friction region having a lower coefficient of friction with respect to the resin of the lower edge than the other region along the longitudinal direction of the webbing at a predetermined position in the width direction in a range in contact with the lower edge, or the other A high friction region having a higher coefficient of friction against the resin at the lower edge than the region;
The seat belt device, wherein the webbing is a knitted fabric knitted in a predetermined pattern, and the low friction region or the high friction region has a pattern different from the other regions.

Images