JPS6339153Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt guide for a vehicle seat belt.

Generally, vehicles such as automobiles are equipped with seat belts to ensure the safety of occupants. This seat belt is a seat belt that restrains the waist, usually called a two-point seat belt.
There are seat belts that restrain the upper torso, usually called shoulder belts, and seat belts that restrain the lower back and upper torso at the same time, usually called three-point seat belts. It is designed to be attached to vehicle body panels such as floor panels and roof side rails. For example, FIG. 1 shows the two-point seat belt 1 described above, and a retractor 4 is attached to the floor panel 3 at the rear lower side of the seat 2 on either side of the seat 2. A tongue 6 is attached to the end of the webbing 5 to be wound. On the other hand, a floor panel 3 is attached to the other side of the seat 2 via a flexible mounting rod 7.
A buckle 8 is provided which is attached to the buckle 8. and,
When the seat belt 1 is worn, the webbing 5 is pulled out from the retractor 4 and the tongue 6 is attached to the buckle 8 (see Utility Model Publication No. 52-119219).

By the way, since there are usually doors, console boxes, etc. (not shown) close to both sides of the seat 2, there is almost no gap between the two sides of the seat 2. Therefore, the buckle 8 and the tongue 6
When the webbing 5 is retracted by the retractor 4, the tongue 6 gets stuck in the gap on the side of the sheet 2 as shown by the imaginary line, making it difficult to take out the tongue 6 for next use. I'm getting used to it. Therefore, conventionally, a belt guide 9 is attached to the side of the seat 2 to prevent the tongue 6 from entering the gap. That is, this belt guide 9 has a guide hole 9 through which the webbing 5 is inserted.
a, and is attached directly to the side of the seat 2 or to the reclining device cover 10, etc., and the tongue 6 is locked to the upper side of the belt guide 9 so that it is always stored in a predetermined position on the seat 2 and can be easily taken out. It's like this.

However, in the case of such a conventional belt guide 9, since the peripheral edge of the guide hole 9a is formed into a continuous rigid body shape over the entire circumference, even if an occupant is wearing a seat belt and a collision occurs, In this case, "wrinkles" are formed on the webbing 5 by the belt guide 9. In other words, in FIG. 2, the solid line indicates the normal state of wearing the seatbelt 1, and the broken line indicates the state of the seatbelt 5 at the time of a collision. However, at the time of a collision, as the occupant 11 moves forward, the webbing 5 tilts forward and bends at the belt guide 9 portion, and an excessive tension is applied to the webbing 5. Therefore, the webbing 5 is pressed against the front inner side of the guide hole 9a of the belt guide 9, and "wrinkles" 12 are generated as shown in FIGS. 3 and 4. Moreover, the "wrinkles" 12 do not return to their original state and remain because the pressing force is too large. Therefore, the 12 "wrinkles" mentioned above cause the webbing 5
There was a problem in that the retractor 5 could no longer take up the material.

In view of such conventional problems, the present invention provides a load relaxation mechanism in the belt guide, and when the webbing is pressed against the inner periphery of the guide hole with a load exceeding a predetermined value, this pressing load is relieved. This is to prevent the occurrence of "wrinkles".

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same components as those in the conventional structure being denoted by the same reference numerals.

FIG. 5 shows the belt guide 20 of the present invention,
A guide hole 20a is formed by abutting the ends of large and small U-shaped members 22 and 23 made of round members 21 each having the same diameter. Reference numeral 24 denotes a mounting piece that is integrally formed on one side of the large member 22 and is located approximately in the center when the large and small members 22 and 23 are butted together. The reclining device cover 10 or the like is fixed to the side of the seat 2 through the hole 24a with a screw 25. Here, in the present invention, a load relaxation mechanism 30 is provided between the abutting ends of the large and small members 22 and 23. As shown in FIG. 6, this load relieving mechanism 30 includes clips 31 protruding from each end of the large member 22, and an engagement formed at each end of the small member 23 into which the clips 31 fit. It is composed of a hole 32. (Place the clip 31 on the small member 23,
may be formed on the large member 22. ) The clip 31 has a small diameter portion 31a protruding from the large member 22.
A cap-shaped hook portion 31b having a larger diameter than the small diameter portion 31a is formed at the tip of the small diameter portion 31a, and an axial slit 31c is formed from the tip of the hook portion 31b to the small diameter portion 31a. It is designed to have elasticity. The diameter of the hook portion 31b is the same as that of the engagement hole 3.
2, the diameter of the round member 21 of the large and small members 22 and 23 is appropriately smaller in consideration of the wall thickness of the peripheral edge of the engagement hole 32. On the other hand, the engagement hole 3
2 is formed to have a diameter substantially equal to or slightly larger than the maximum diameter of the hook portion 31b, and a small diameter hole 32a is formed at the open end to have a diameter smaller than the maximum diameter of the hook portion 31b.
is provided, and the clip 31 is inserted into the engagement hole 32.
When the clip 31 is inserted, the maximum diameter portion of the hook portion 31b engages with the small diameter hole 32a, and the clip 31 The engagement hole 32 is prevented from coming off.

With the above configuration, the belt guide 20 of the present invention
When using normal seat belt 1, webbing 5
It is the same as the conventional method to guide the tongue 6 and place it in a position where it is easy to take out the tongue 6. However, if a collision occurs while the seat belt 1 is being worn, as described above, if the tongue 6 is inserted into the belt guide 20, An excessive tension is applied to the webbing 5, and the webbing 5 is tilted forward and pressed against the front part of the guide hole 20a of the belt guide 20 with a large load. Then, the clip 31 and the engagement hole 32 that constitute the load relaxation mechanism 30 are separated, and the small member 24 is detached from the large member 22, releasing the restraint of the webbing 5 and moving from the retractor 4 to the position where the occupant 11 is restrained. The "wrinkles" 12 that were previously formed in a straight line are not generated.

Note that the small member 23 separated from the large member 22 can be reused by combining it later.

By the way, in this embodiment, since the webbing 5 is attached to the floor panel 3 by the retractor 4 and the webbing 5 is
Although the tongue 6 is shown attached to the opposite end of the webbing 6, the present invention is not limited to this, and the webbing 5 may be attached to the floor panel 3 simply by an anchor. Needless to say, it is also possible to attach a buckle to the base.

7A and 7B show other embodiments, in which a notch 40 as a load relaxation mechanism 30 is formed at the periphery of the guide hole 20a of the belt guide 20, and the notch 40 shown in FIG. Form into a hole shape, B
The notch 40 shown in the figure is formed in the shape of a notch that opens outward from the peripheral edge of the guide hole 20a. Therefore, in this embodiment, when the webbing 5 is pressed against the inside of the guide hole 20a with a load greater than a predetermined value, the peripheral edge of the guide hole 20a is cut from the notch 40 to absorb the pressing load. can be alleviated. Although this embodiment cannot be reused after being cut through the notch 40, it has the advantage that it can be formed with a simple structure.

FIG. 8 shows another embodiment, in which an extensible portion 50 as a load relaxation mechanism 30 is formed at the periphery of the guide hole 20a. That is, in this embodiment, the belt guide 20 is formed of a flexible member such as synthetic resin, and the elastic portion 5
0 and is normally in a shortened state. Therefore, in this embodiment, when the pressing load of the webbing 5 acts on the inside of the guide hole 20a, the extensible portion 50 expands to relieve the pressing load. In addition, the amount of expansion of this telescopic portion 50 is such that the webbing 5 is connected to the retractor 4 and the occupant 1 at the time of a collision.
Needless to say, the setting is such that it is possible to extend the first constraint point in a straight line.

Further, the seat belt 1 is not limited to the two-point type shown in the figure, but may also be a shoulder belt type, three-point type, or other types, and includes a belt guide for guiding the webbing with one end attached to the floor panel side. It is fine as long as it is.

FIG. 9 shows still another embodiment, in which the guide hole 20
The front end of a is opened, and this open part 60 is used as the load relaxation mechanism 30. That is, the opening portion 60 is
It is normally closed with a predetermined urging force, and is opened by the pressing load of the webbing 5 that is applied during a collision, etc., and the webbing 5 is detached from the guide hole 20a.

As explained above, in the belt guide provided with the guide hole through which the seat belt webbing passes, when the webbing is tensioned and moved during a vehicle collision or the like, and the webbing is pressed against the inner circumference of the guide hole with a load of a predetermined magnitude or more, a load relief mechanism is provided around the guide hole to relieve this pressing load, so that the load relief mechanism prevents the webbing from forming "wrinkles" even when pressed against the inside of the guide hole. This allows the webbing to be wound up by a retractor, and provides the practical advantage of making it possible to use the seat belt even after a vehicle collision.

[Brief explanation of drawings]

Figure 1 is an overall perspective view showing the belt guide of a conventional seat belt, Figure 2 is an explanatory diagram showing the movement of the seat belt in the conventional belt guide, and Figure 3 is the webbing formed by the conventional belt guide. FIG. 4 is a sectional view taken from the - line in FIG. 3, FIG. 5 is an exploded perspective view showing an embodiment of the belt guide of the present invention, and FIG. 7A and 7B, FIG. 8, and FIG. 9 are configuration diagrams showing other embodiments of the present invention, respectively. 1... seat belt, 2... seat, 3... floor panel, 4... retractor, 5... webbing, 6... tongue, 8... buckle, 9... belt guide, 9a...
Guide hole, 11... Occupant, 12... Wrinkle, 20... Belt guide, 20a... Guide hole, 30... Load relaxation mechanism.

Claims (1)

[Scope of utility model registration request] One end is attached to the floor side via a retractor or anchor, and the other end has a guide hole through which the seat belt webbing is inserted, and the other end has a buckle or tongue attached. In the belt guide of a vehicle seat belt, when the webbing is moved under tension during a vehicle collision, etc., and the webbing is pressed against the inner periphery of the guide hole with a load exceeding a predetermined value. A belt guide for a vehicle seat belt, characterized in that a load relaxation mechanism for relieving this pressing load is provided at the periphery of the guide hole.