JP2003170807A - Through anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a through anchor capable of preventing inclination of a webbing without causing large-scaling, being commonized in right and left seats, and having excellent appearance when installing the through anchor to a vehicle. <P>SOLUTION: In this through anchor 10, a nearly center part on the rear face side of a webbing winding part 24 is formed with a recess part 26 having a width narrower than the webbing 20. When a large tensile load is applied to the webbing 20, the webbing 20 is deformed along the recess part 26 and is closely contacted with the recess part 26. Accordingly, even if the webbing 20 is just about slipping sideways on the winding part 24 of the through anchor 10, movement of the webbing 20 in the width direction is prevented to prevent the inclination of the webbing 20. Because the recess part 26 is only provided in the nearly center part of the winding part 24 of the through anchor 10, the through anchor 10 is not enlarged and can be commonized in the right and left seats. Because the recess part 26 is not viewed from inside a cabin, the through anchor 10 has the excellent appearance. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a through anchor for supporting a webbing for restraining an occupant on a vehicle body, which is used in a vehicle seat belt device. 2. Description of the Related Art As a vehicle seat belt device, there is a three-point seat belt device using continuous webbing. In this type of seat belt device, one end of the webbing is locked by a winding device provided on the side of the seat. Furthermore, the other end is wound around a through anchor attached to a center pillar or the like, is folded, and is locked by an anchor plate provided near the winding device.
When the occupant mounts the webbing, the tongue plate provided at the webbing intermediate portion between the anchor plate and the through anchor is engaged with the buckle device provided on the side of the seat opposite to the winding device. By the combination, the webbing is pulled out from the winding device and is brought into a mounted state. By the way, in the above-mentioned through anchor, there is a type in which the webbing can be smoothly pulled out and wound up by using a low friction material such as a fluororesin or chrome plating in a portion around which the webbing is wound. On the other hand, as shown in FIG.
When a large load is applied to the webbing 02 and its component acts in the webbing width direction, the winding portion 106 of the through anchor 100
And slides sideways to one end of the webbing insertion hole 104. Therefore, through anchor 1
There is a configuration in which the webbing 102 is prevented from being biased by increasing the turning radius (dimension L in FIG. 5) of 00. In other words, the direction of the above-mentioned load is on the line connecting the winding portion 106 of the through anchor and the tongue plate (not shown). If the rotation fulcrum of the through anchor 100 is the same, the rotation radius is increased to increase the webbing. The component force in the width direction applied to 102 increases. This makes it easy to rotate the through anchor 100, so that the webbing 102 can be prevented from being offset. However, in this case, since the through anchor 100 is enlarged, the appearance when mounted on the vehicle body is poor, and the degree of freedom in selecting the mounting position on the vehicle body is limited. On the other hand, in order to prevent the webbing 102 from shifting as described above, the through anchor 10
There is a configuration in which a plurality of grooves are provided in the webbing-wound portion 106 of No. 0 to prevent the webbing 102 from being biased by friction (as an example, actual opening 1993-44719).
JP-A-2000-85526). In this case, there is no disadvantage that the through anchor 100 becomes large, as described above, but without sacrificing the slipperiness when the webbing 102 is pulled out or the like, and without the webbing 102 being pulled out.
In order to prevent the skidding of the webbing 102, the groove must be formed obliquely in the direction in which the webbing 102 is pulled out. Accordingly, it is necessary to prepare two types of through anchors 100 having different groove directions in the left and right seats, which has caused an increase in cost. Furthermore, this groove has a poor appearance because it can be seen from the vehicle interior when the through anchor 100 is mounted on the vehicle. [0005] In consideration of the above fact, the present invention not only can prevent the webbing from being shifted, but also can be shared by the left and right seats without increasing the size. In addition, it is an object of the present invention to obtain a through anchor having a good appearance when attached to a vehicle body. According to a first aspect of the present invention, there is provided a through anchor, which is attached to a predetermined position of a vehicle body and is wound around webbing for restraining an occupant and supported on the vehicle body. A recess having a width narrower than that of the webbing is provided substantially at the center of the back side of the webbing-wound portion. In the through anchor according to the first aspect, the webbing for restraining the occupant is wound around the through anchor and supported by the vehicle body. Here, as long as a large tensile load is not applied to the webbing, the portion facing the recess of the webbing does not deform along the recess due to its rigidity, and usually the webbing can be smoothly pulled out. . On the other hand, for example, when the vehicle is suddenly stopped and the webbing retractor locks the webbing withdrawal, and the occupant's body moves forward in the vehicle and a large tensile load is applied to the webbing, the webbing is It is pressed against the webbing-wound portion of the through anchor. Thereby, the portion of the webbing facing the concave portion is deformed along the concave portion and comes into close contact with the concave portion. Therefore, even if the webbing attempts to slide (offset) the winding portion of the through anchor, the webbing is prevented from moving in the width direction, and the offset of the webbing can be prevented. Further, the recess is only provided in the portion around the webbing of the through anchor, and the through anchor does not increase in size. Furthermore, since the recess is provided substantially at the center of the webbing-wound portion of the through anchor, it can be shared by both left and right seats, and costs are lower than conventional through anchors. In addition, since the concave portion is provided on the back surface side of the through anchor, it is not visible from the vehicle interior, so that the appearance is good. As described above, the through anchor according to the first aspect of the present invention can not only prevent the webbing from being shifted, but also can be shared by the left and right seats without increasing the size. Good appearance when attached to the vehicle. FIG. 1 is a front view of a through anchor 10 according to an embodiment of the present invention. FIG. 2 is a side view, and FIG.
FIG. 3B shows a bottom view. The through anchor 10 includes a metal core 12
And a resin covering portion 14. A support hole 16 is formed in the vicinity of the upper end portion of the cored bar 12, and a bolt (not shown) is inserted through the support hole 16, and the support bar 16 is attached to the vehicle body such that the back side shown in FIG. Further, a through hole 18 is formed at a substantially central portion of the cored bar 12. on the other hand,
A coating 14 is integrally molded with the cored bar 12 (around the through hole 18) using a low friction material such as a fluororesin. Thus, an insertion hole 22 through which the webbing 20 for restraining the occupant is inserted, and a winding portion 24 around which the webbing 20 inserted through the insertion hole 22 is formed. Further, as shown in detail in FIG. 3A, a recess 26 is formed on the back surface side of the through anchor 10 and substantially at the center of the winding portion 24. The recess 26 is formed in the webbing 2
0, and the width of the winding portion 24
It is formed open to the bottom edge. Next, the operation of the embodiment of the present invention will be described. In the through anchor 10, the webbing 20 is wound around a winding portion 24 of the through anchor 10 and is supported by the vehicle body. At this time, a part of the webbing 20 at a substantially central portion in the width direction and the concave portion 26 face each other. Here, as shown in FIG. 4A, the portion of the webbing 20 facing the concave portion 26 is deformed along the concave portion 26 by its rigidity unless a large tensile load is applied to the webbing 20. There is no. Thereby, normally, the webbing 20 can be smoothly pulled out. On the other hand, for example, when the drawer of the webbing 20 is locked by a webbing take-up device (not shown) when the vehicle suddenly stops, the occupant's body moves in the forward direction of the vehicle, and a large tension is applied to the webbing 20. When a load is applied, the webbing 20 is pressed against the winding portion 24 of the through anchor 10 by the tensile load at this time.
As a result, the portion of the webbing 20 facing the concave portion 26 is deformed along the concave portion 26 as shown in FIG. Therefore, even if the webbing 20 slides sideways on the wrapping portion 24 of the through anchor 10 and is shifted to one end of the insertion hole 22, the movement of the webbing 20 in the width direction is prevented, and the webbing 20 is shifted. Can be prevented. In addition, the concave portion 26 is provided in the winding portion 24 of the through anchor 10, so that the through anchor 10 does not become large. Furthermore, since the concave portion 26 is provided substantially at the center of the winding portion 24, it can be shared by the left and right seats of the vehicle, so that it is not necessary to prepare two types of through anchors, so that no cost is required. Further, since the recess 26 is provided facing the vehicle interior when the through anchor 20 is attached to the vehicle body, it is not visible from the vehicle interior, so that the appearance is good. As described above, in the through anchor 10 according to the present embodiment, not only the offset of the webbing 20 can be prevented, but also the webbing 20 can be shared by the left and right seats without increasing the size. At the same time, it looks good when attached to the vehicle body. As described above, the through anchor according to the present invention can not only prevent the webbing from being shifted, but also can be shared by the left and right seats without increasing the size. In addition, it has an excellent effect that the appearance when attached to the vehicle body is good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a configuration of a through anchor according to an embodiment of the present invention. FIG. 2 is a side view showing a configuration of a through anchor according to the embodiment of the present invention. 3A and 3B show a configuration of a through anchor according to an embodiment of the present invention, wherein FIG. 3A is a rear view and FIG. 3B is a bottom view. 4A and 4B show a correspondence relationship between a through anchor and a webbing according to the embodiment of the present invention, where FIG. 4A is a cross-sectional view along a line 4-4 in FIG. 4) is a cross-sectional view taken along line 4-4 in FIG. 3A in a state where a high load is applied to the webbing. FIG. 5 is a front view showing a conventional through anchor. [Description of Signs] 10 Through anchor 20 Webbing 24 Wound portion (Webbing wrapped portion) 26 Depressed portion

Claims (1)

Claims: 1. A through anchor attached to a predetermined position of a vehicle body and wound around a webbing for restraining an occupant and supporting the webbing on the vehicle body. A recess having a width narrower than that of the webbing.