JPS6335869Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a seat belt guide for automobiles that is inserted into the seat and attached to the seat to protect the occupant by restraining them in the event of a predetermined load such as sudden braking, collision, rollover, etc. be.

As a conventional automobile seat belt guide,
For example, there are those shown in FIGS. 1 to 4.
(Refer to Utility Model Application Publication No. 142219/1983).

In the figure, reference numeral 1 denotes a seat, which is composed of a seat portion 1a slidably attached to the vehicle body 8 and a back portion 1b attached to the seat portion 1a so as to be tiltable.
A reclining device (not shown) that rotatably connects the seat portion 1a and the back portion 1b and tilts the back portion 1b, and a cover 5 that covers this device are attached to the seat 1.

On the other hand, the seat belt 10 passes through a retractor 6 fixed to the vehicle body 8 on one side of the seat 1, a lap belt 3 pulled out from the retractor 6, a tongue 7 attached to the tip of the lap belt 3, and the lap belt 3. It consists of a belt guide 4 and a buckle 2 fixed to the vehicle body 8 on the other side of the seat 1 and into which a tongue 7 is inserted. This belt guide 4
is attached to the cover 5 of the seat 1, for example,
As shown by the two-dot chain line in FIG. 1, the tongue 7 of the lap belt 3 does not drip onto the floor or is wound up by the winding device 6 near the floor, and is always held in a position where the passenger can easily grasp it. . Especially when the seat 1 slides back and forth on the vehicle body 8, the belt guide 4 functions effectively.

However, in such a conventional seat belt 10, since the belt guide 4 is fixed to the seat 1, when a predetermined load is applied such as in the event of a collision, the body moves forward as shown in FIG.
When the pulling direction of the belt changed, the lap belt 3 was pulled to one side as shown in FIG. 3, causing wrinkles. In the case of tension that causes wrinkles, the entire width of the lap belt 3 will not receive a uniform force, and there will be areas where stress is concentrated, which may reduce the tensile strength. Furthermore, once wrinkles occur, the winding device 6 may not be able to properly wind the paper, and there is a risk that smooth winding may not be possible.

This idea was made by focusing on the problems of the conventional technology, and includes attaching an annular member to a guide member so as to be able to move forward within a predetermined range from the connecting part, and inserting an intervening device between the annular member and the guide member. The annular member is biased rearward by the biasing means, and the annular member is allowed to move forward when a forward impact tensile load is applied to the seat belt inserted through the annular member. The purpose of this invention is to solve the above problem by setting the biasing force by the biasing means to a value equal to .

This invention will be explained below based on the drawings. Fifth
9 to 9 are diagrams showing a first embodiment of this invention. First, to explain the structure, the reference numeral 20 in the figure is a belt guide, and the belt guide 20 is formed of an annular member 24 through which the lap belt 3 is inserted, and a U-shaped pipe that slides and guides this annular member 24. A guide member 21, an elastic member (here, a coil spring is used) 28 that is inserted into the pipe of the guide member 21 and always biases the annular member 24 in a certain direction, and the coil spring 28. It is composed of a holding member 26 to prevent the pipe from jumping out from inside the pipe. The annular member 24 has an elliptical shape with a long axis in the sliding direction, and has a pair of engagement protrusions 2 that are biased toward one end of the elliptical ring and protrude from both ends of the short axis.
5 and 25 are provided facing each other. The engaging protrusions 25, 25 are engaged with a pair of slits 23, 23 provided inside the guide member 21 so as to face each other. Coil springs 28 and 28 are inserted into the inside of the guide member 21 to press the engagement protrusions 25 and 25 of the annular member 24 toward the bent portion of the guide member 21, respectively. Further, projections 27 provided at both ends of a pressing member 26 that presses the coil spring are fitted into and fixed to both open ends of the guide member 21. An attachment portion 22 for attachment to the cover 5 of the reclining device is formed on one side of the guide member 21. A bolt 29 is provided protruding from this attachment portion 22 . The belt guide 20 is
It is attached to the cover 5 with bolts 29. The lap belt 3 is inserted into the annular member 24, and the seat belt 10 is in the attached state as shown in FIG.

Next, the action will be explained.

When the driver suddenly brakes while driving, the vehicle collides with an obstacle, or rolls over, the seat belt 10 is also subjected to force and its tension direction changes as the occupant moves. At that time, Fig. 6, Fig. 7 a
As shown in FIG. 2, the annular member 24 of the belt guide 20 slides through the slit 23 of the guide member 21 following the seat belt 10. Guide member 21
The coil spring 28 inserted therein is compressed by the movement of the engagement protrusion 25 of the annular member 24. The compressed coil spring 28 returns to its original shape when the operating condition becomes normal, and the annular member 2
4 to its original position as shown in Figure 7b.

Further, when the seat 1 moves back and forth as shown in FIG. 9, the lap belt 3 is slidably moved within the belt guide 20 by the annular member 24, so that it corresponds to changes in the tension direction of the lap belt 3. Therefore, even if an abnormal situation such as a collision occurs, the lap belt 3 will not wrinkle and will not be subjected to concentrated stress, and will exhibit sufficient tensile strength.

A second embodiment is shown in FIGS. 10 to 12. First, the configuration will be described. The belt guide 30 is roughly formed from a guide member 31, an annular member 35, and a coil spring 37. Annular member 35
, an engaging portion 36 is provided on one side of the short axis so as to protrude in the short axis direction and is biased towards the left end in the figure.
The guide member 31 is a box shaped like a rectangular parallelepiped with an opening on one side, and a slit 33 is provided at the center of the surface facing the opening along the longitudinal direction of the surface. This slit 33 has the annular member 3
5 engaging portions 36 are slidably attached. Furthermore, flanges 32 projecting in the longitudinal direction are provided at both ends of the guide member 31 in the longitudinal direction, and the flanges 32 have holes 39 for attaching to the cover 5.
is drilled. Further, a plate member 34 that closes the opening is joined to the opening of the guide member 31 and extends to the ends of both flanges 32. Flanges 32 are provided at both ends of this plate member 34.
A hole 34a corresponding to the hole 39 is bored.
The belt guide 30 is fixed to the cover 5 by passing bolts 38 through these holes 39 and 34a. Note that the coil spring 37 is disposed inside the guide member 31 to bias the annular member 35 in one direction. The other configurations and operations are the same as those in the first embodiment, so their explanations will be omitted.

Further, the belt guide 40 shown in FIG.
This is a modification of the belt guide 30 of the embodiment, in which an annular member 45 is slidably attached to the guide member 31 at the engaging portion 36 and is attached to the guide member 31 by two coil springs 47 so as to be stopped at an intermediate position. Forced.

As explained above, in this invention, the annular member is mounted on the guide member so as to be able to move forward within a predetermined range from the connecting part, and the annular member is moved toward the rear using the biasing means interposed between the annular member and the guide member. The biasing force of the biasing means is set to a value that allows the annular member to move forward when a forward impact tensile load is applied to the seat belt inserted through the annular member. Because of this configuration, the annular member through which the seat belt is inserted is urged rearward by the urging means, and it is possible to always keep the seat belt supported at a constant position on the side of the seat. As a result, the seat belt can be attached via the vicinity of the hip point of the occupant, and the effect of wearing the seat belt can be most effectively exhibited. Furthermore, even if the occupant moves forward in an abnormal situation such as a collision and the belt tension direction changes, the annular member is guided by the guide member and slides, so the belt can be pulled across its entire width in accordance with the tension direction when a predetermined load is applied. Receive power. Therefore, the belt does not wrinkle and always has a constant width, allowing the winding device to operate smoothly. In addition, since the width of the belt does not change, stress is applied uniformly across the entire width, and sufficient seatbelt performance can always be achieved without reducing tensile strength.

[Brief explanation of the drawing]

Figures 1 to 4 are conventional examples, and Figure 1 is
Perspective view showing the seat belt attachment state, 2nd
The figure is a side view illustrating the movement of the seatbelt in the event of a collision, FIG. 3 is an enlarged view of the main parts of the seatbelt in the event of a collision, FIG. Fig. 9 shows the first embodiment of this invention, Fig. 5 is an exploded perspective view of the belt guide, Fig. 6 is a vertical sectional view of the belt guide, and Figs. 7a and b are illustrations of the belt guide. A plan view showing the moving state of the annular member, FIG. 8 is a cross-sectional view of FIG. 6,
Figure 9 is a side view illustrating the movement of the seat belt when the seat is moved forward, and Figures 10 to 12 are
The figures show a second embodiment of this invention, in which Fig. 10 is an exploded perspective view of the belt guide, Fig. 11 is a central vertical sectional view of the belt guide, and Fig. 12 is the same as that of Fig. 11.
XII-XII sectional view and FIG. 13 are central vertical sectional views similar to FIG. 11 showing a modification of the second embodiment. 1... Seat, 20, 30, 40... Belt guide, 21, 31... Guide member, 3... Wrap belt, 24, 35, 45... Annular member, 23,
33...slit, 25, 36...engaging member, 2
8, 37, 47...Coil spring.

Claims (1)

[Claims for Utility Model Registration] An automobile seat belt comprising a guide member attached to a connecting portion between a seat cushion side part and a seat back side part, and an annular member for inserting and supporting the seat belt attached to the guide member. The guide is configured such that the annular member is attached to the guide member so as to be movable forward within a predetermined range from the connecting portion, and the annular member is moved rearward by a biasing means interposed between the annular member and the guide member. The biasing force is set to a value that allows the annular member to move forward when a forward impact tensile load is applied to the seat belt inserted through the annular member. A seat belt guide for an automobile, characterized in that a biasing force is set by a means.