JPH0567561U - Webbing for seat belt devices - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to obtain a webbing for a seat belt device that can reduce the feeling of pressure on an occupant due to the webbing during sudden vehicle deceleration without increasing the size of the webbing-related parts. [Structure] The webbing 10 includes a webbing base portion 28 and a wide webbing portion 32, and the wide webbing portion 32 is temporarily sewn with a suture thread 32 having a predetermined strength. Therefore, the suture thread 32 does not break under normal vehicle traveling conditions, but the suture thread 32 does not break when the vehicle suddenly decelerates.
And the wide webbing portion 32 spreads. Therefore, the surface pressure that the abdomen of the occupant receives from the webbing 10 during sudden vehicle deceleration is reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an occupant restraining webbing used in a seat belt device installed in a vehicle.

[0002]

[Prior Art]

 In a seat belt device, for example, a three-point seat belt device, a webbing for restraining an occupant, a winding device for winding one end of the webbing, an anchor plate to which the other end of the webbing is locked, and an intermediate portion of the webbing. A slip joint through which the portion is inserted, a tongue plate inserted through the intermediate portion of the webbing, and a buckle device with which the tongue plate engages are provided. In such a seat belt device, in order for the occupant to be put on the webbing, the tongue plate may be gripped and engaged with the bag device. As a result, the occupant can be put on the three-point type seat belt device by the lap side webbing and the shoulder side webbing.

When the vehicle suddenly decelerates in this webbing-mounted state, the occupant tries to move inertially, but is restrained by the lap-side and shoulder-side webbings, so that safety is ensured.

[0004]

[Problems to be solved by the device]

 However, depending on the degree of sudden deceleration of the vehicle, the webbing that restrains the occupant (especially the lap side webbing) presses the occupant (especially the abdomen) more than necessary when the occupant tries to move inertially. The problem arises.

This problem can be solved by making the widthwise dimension of the webbing wider than that of the conventional webbing in advance. However, if a webbing of a uniformly wide width is used, the winding for storing the webbing can be simply used. In addition to the take-up device, parts such as slip joints and tongue plates must be enlarged.

In consideration of the above facts, the present invention has an object to obtain a webbing for a seat belt device capable of reducing the feeling of pressure on an occupant due to the webbing during sudden vehicle deceleration without increasing the size of the webbing-related parts. is there.

[0007]

[Means for Solving the Problems]

 The present invention relates to an occupant restraining webbing used in a seatbelt device installed in a vehicle, the webbing having a webbing base having a predetermined uniform width along a longitudinal direction, and a webbing mounted state. In a state where the load acting on the webbing is less than a predetermined value, there is a webbing wide portion that is provided in a part or all of the range in contact with the occupant and is wider than the uniform width in the extended state. , The wide portion of the webbing is held so that its apparent widthwise dimension substantially matches the uniform width, and when the load acting on the webbing exceeds a predetermined value, the wide portion of the webbing extends and appears. It is characterized in that the upper dimension in the width direction is wider than the uniform width.

[0008]

[Action]

 According to the present invention configured as described above, the webbing is provided in a part or all of the webbing base having a predetermined uniform width along the longitudinal direction and a part or all of the webbing mounted occupant in an extended state. And a wide webbing portion that is wider than the uniform width of the webbing base portion.

Here, when the acting load on the webbing is less than a predetermined value, the wide portion of the webbing is held such that its apparent widthwise dimension substantially matches the uniform width. When the width is equal to or larger than the predetermined value, the wide portion of the webbing is extended and its apparent widthwise dimension is wider than the uniform width. Therefore, by setting the above-mentioned fixed value to the load that acts on the webbing when the vehicle suddenly decelerates, the wide webbing portion is held at a predetermined uniform width during normal vehicle traveling, etc. There is no need to change the design of the device (upsize). Further, when the vehicle is suddenly decelerated, the wide portion of the webbing becomes wider than the uniform width, so that the occupant's sense of pressure is reduced.

[0010]

【Example】

 Hereinafter, a seat belt device 12 including a webbing 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 2, the seat belt device 12 includes a winding device 16 arranged at a lower portion of a vehicle side wall 14, and one end portion of the webbing 10 is wound around the winding device 16. There is. The other end of the webbing 10 pulled out from the winding device 16 passes through an opening of a slip joint 18 provided at an upper portion of the vehicle side wall 14 and is locked to an anchor plate 20 provided at a lower portion of the vehicle side wall 14. ing. A tongue plate 22 is inserted through the webbing intermediate portion between the slip joint 18 and the anchor plate 20. The tongue plate 22 can be engaged with a buckle device 24 which is erected in the substantially center of the vehicle, and an occupant seated on a seat 26 (shown by a chain double-dashed line in FIG. 2) is The webbing 10 can be mounted by engaging with the buckle device 24. When the occupant wears the webbing 10, the middle part of the webbing between the slip joint 18 and the tongue plate 22 is diagonally positioned on the chest from the shoulder to the waist of the occupant and functions as the shoulder side webbing 10A. The intermediate portion of the webbing between the tongue plate 22 and the anchor plate 20 is located on the abdomen of the occupant and functions as the lap side webbing 10B.

As shown in FIG. 1, the webbing 10 described above is composed of a webbing base portion 28 and a wide webbing portion 30. Of these, the webbing base portion 28 is applied to a position other than the range where the webbing base portion 28 contacts the occupant's abdomen when the occupant is wearing the webbing. The dimension U of the webbing base 28 in the width direction is the same along the longitudinal direction of the webbing and is about 50 mm.

On the other hand, the wide webbing portion 30 is applied to a range that comes into contact with the occupant's abdomen when the occupant is wearing the webbing. The wide webbing portion 30 is formed by temporarily folding a webbing wider than the webbing base portion 28 by folding it in a bellows shape in the webbing width direction. That is, the wide webbing portion 30 has a widthwise dimension W (for example, about 80 [mm]) that is wider than the widthwise dimension U of the webbing base portion 28 in the extended state (see FIG. 4). By folding the webbing in a bellows shape in the widthwise direction and temporarily stitching the adjacent peaks with the suture thread 32, the webbing base 28 is apparently held with a widthwise dimension substantially matching the widthwise dimension U of the webbing base 28. Is configured to be. The suture thread 32 is designed to be cut when a load of a predetermined value or more is applied. In this embodiment, the load applied to the webbing 10 when the vehicle suddenly decelerates is set to a predetermined value at which the suture thread 32 cuts. ..

The operation of this embodiment will be described below. When the occupant sits on the seat 26 and wears the webbing 10, the tongue plate 22 may be gripped and engaged with the buckle device 24. As a result, the three-point seat belt device 12 can be mounted by the shoulder side webbing 10A and the lap side webbing 10B.

In this state, when the vehicle is in a normal running state, the load acting on the webbing 10 is less than a predetermined value. Therefore, the apparent widthwise dimension of the wide webbing portion 30 is equal to the widthwise dimension of the webbing base 28. They are substantially in agreement and are held in this state (state shown in FIG. 3).

When the vehicle suddenly decelerates from this state, the occupant attempts to move inertially (note that the position of the occupant in the normal vehicle running state is shown by the chain double-dashed line in FIG. 4). As a result, the wide webbing portion 30 is pressed in the inertial movement direction by the abdomen of the occupant. Therefore, the load acting on the wide webbing portion 30 becomes a predetermined value or more, and the suture thread 32 is cut. At the same time, as shown in FIG. 4, the wide webbing portion 30 spreads in the webbing width direction, and the contact area with which the abdomen of the occupant contacts is increased. Therefore, the surface pressure that the occupant receives from the lap side webbing 10B is reduced.

As described above, in this embodiment, the webbing 10 is composed of the webbing base portion 28 and the wide webbing portion 30, and the wide webbing portion 30 is applied to a portion in contact with the abdomen of the occupant (the webbing 10B on the lap side). Therefore, it is possible to reduce the surface pressure that the occupant's abdomen receives from the lap-side webbing 10B in the rapid vehicle deceleration state, and to prevent the occupant's abdominal tightening. Further, in a normal vehicle running state, since the apparent widthwise dimension of the wide webbing portion 30 substantially matches the widthwise dimension U of the webbing base portion 28, it is not necessary to upsize the tongue plate 22.

In the present embodiment, the case where the webbing 10 according to the embodiment of the present invention is applied to the three-point seat belt device 12 has been described as an example, but the present invention is not limited to this. The present invention may be applied to a seat belt device of a type (including a seat belt device of a type which is provided in a rear seat and does not include a winding device).

Further, in the present embodiment, the wide webbing portion 30 is provided at a portion that comes into contact with the abdomen of the occupant, but the present invention is not limited to this, and the wide webbing portion 30 may be provided only on the shoulder side webbing 10A. The wide webbing portion 30 may be provided on both the shoulder-side webbing 10A and the lap-side webbing 10B, and the webbing wide portion 30 may be applied to any part as long as it is in a range where it contacts the occupant when the occupant is wearing the webbing. Good. When the wide webbing portion 30 is provided on both the shoulder side webbing 10A and the lap side webbing 10B, a surface pressure reducing effect is obtained not only on the abdomen but also on the chest, and in addition to the tongue plate 22, the winding device. 16 and the slip joint 18 etc. do not have to be upsized.

Further, in the present embodiment, the wide webbing portion 30 is folded in a bellows state and provisionally sewn with the suture thread 32. However, the present invention is not limited to this, and as shown in FIG. The webbing 34 may be used in which the portions 34B that are wider than 34A are folded back in the direction in which they are close to each other and temporarily sewn with the suture thread 32 in this state (the state shown by the chain double-dashed line in FIG. 5).

[0021]

[Effect of the device]

 As described above, the webbing for a seat belt device according to the present invention has an excellent effect that it is possible to reduce the feeling of pressure on the occupant due to the webbing during the rapid deceleration of the vehicle without increasing the size of the webbing related parts. Have.

[Brief description of drawings]

FIG. 1 is a perspective view showing a webbing according to an embodiment of the present invention.

FIG. 2 is a front view showing a schematic configuration of a seat belt device including the webbing of FIG. 1 as seen from the front of the vehicle.

FIG. 3 is a cross-sectional view showing a wide webbing portion in a normal vehicle traveling state.

FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing the wide portion of the webbing in a vehicle rapid deceleration state.

FIG. 5 is a perspective view corresponding to FIG. 1, showing a webbing according to a modified example.

[Explanation of symbols]

 10 webbing 12 seat belt device 28 webbing base 30 webbing wide part 32 suture 34 webbing 34A webbing base 34B webbing wide part

Claims (1)

[Scope of utility model registration request] 1. A webbing for restraining an occupant used in a seat belt device arranged in a vehicle, wherein the webbing has a webbing base having a predetermined uniform width along a longitudinal direction, and a webbing mounted state. A webbing wide portion that is provided in a part or all of a range in contact with a certain occupant and is wider than the uniform width in an extended state, and in a state where a load acting on the webbing is less than a predetermined value, the webbing is The wide portion is held so that its apparent widthwise dimension substantially matches the uniform width, and when the acting load on the webbing is equal to or greater than a predetermined value, the wide portion of the webbing is extended and its apparent widthwise direction. A webbing for a seat belt device, which is wider than the uniform width.