JP3809737B2 - Air belt device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air belt device for protecting a passenger of a moving body such as a vehicle at the time of a collision, and more particularly to an air belt device in which an internal bag is inflated by a gas from a gas generating device.
[0002]
[Prior art]
As this type of air belt device, there is one described in JP-A-5-85301. FIG. 2 is a perspective view of the air belt device disclosed in the publication.
[0003]
The air belt device 1 includes an air belt 2 extending obliquely from the right side of the occupant to the left side, a webbing 2a connected to the air belt 2, a lap belt 3 extending from the right side of the occupant to the left side, a vehicle body floor A buckle device 4 disposed in a section, a tongue 5 inserted and locked to the buckle device 4 when the belt is mounted, a through anchor 6 for guiding the webbing 2a, and the like.
[0004]
The webbing 2a is a normal belt similar to a conventional general seat belt, and is slidably guided through the through anchor 6. The other end of the webbing 2a is connected to a seat belt retractor (ELR) 7 with an emergency lock mechanism fixed to the vehicle body so as to be wound.
[0005]
One end of the air belt 2 is connected to the webbing 2 a by sewing or the like, and the other end is connected to the tongue 5.
[0006]
The lap belt 3 is formed of a normal belt similar to a general seat belt, one end of which is connected to the tongue 5 and the other end is connected to a seat belt retractor (ELR) 8 fixed to the vehicle body. Yes. Connected to the buckle device 4 is a gas generator 9 that operates in an emergency need such as a vehicle collision and generates high-pressure gas.
[0007]
The tongue 5 and the buckle device 4 are provided with a passage for guiding the gas from the gas generator 9 to the air belt 2.
[0008]
The air belt 2 is formed by folding a thick belt-like bag into a narrow belt and covering it with a cover, and is normally kept in a belt shape. The air belt device 1 is used in the same manner as a normal seat belt device. When the gas generator 9 is activated at the time of a vehicle collision or the like, the air belt 2 is inflated as shown by a two-dot chain line to protect the occupant.
[0009]
[Problems to be solved by the invention]
In the conventional air belt apparatus, two retractors 7 and 8 are required to apply tension to each of the air belt and the lap belt.
[0010]
An object of the present invention is to provide an air belt device that can apply tension to both the air belt and the lap belt by a single retractor.
[0011]
Another object of the present invention is to provide an inflatable belt device in which tension generated in the inflatable belt is transmitted to the lap belt.
[0012]
[Means for Solving the Problems]
An inflatable belt of the present invention includes an inflatable inflatable belt, a gas generator for supplying and inflating gas into the inflatable belt, a tongue to which one end of the inflatable belt is connected, and a lap belt having one end connected to the tongue. A belt-like body connected to the other end of the air belt, a retractor for winding up either the lap belt or the belt-like body, a vertically movable lap belt guide around the lap belt, and the belt-like body A belt-shaped body guide that can be moved up and down is provided, and a connecting member that connects the lap belt guide and the belt-shaped body guide.
[0013]
In such an air belt device, since the lap belt guide and the belt-like body are connected by the connecting member, when tension is applied to one of the lap belt and the belt-like body, the other member is also connected to the other via the connecting member. Tension is transmitted.
[0014]
The lap belt guide and the belt-like body guide are preferably rotatable rollers.
[0015]
The air belt device of the present invention includes a buckle device to which a tongue is attached, and the buckle device is provided with gas generating means, and a gas passage for guiding gas from the gas generating means to the air belt is provided in the air belt device. It is preferable that the buckle device and the tongue are provided.
[0016]
In the present invention, the strip is passed through the through anchor and drawn downward, then hung on the strip guide and drawn upward, and the upper end side is connected to either the vehicle body or the retractor. The lap belt is passed through a wrap-through anchor and drawn upward, and is then hooked on the lap belt guide and drawn downward, and its lower end side is connected to either the vehicle body or the retractor. It is preferable.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view of an air belt device according to an embodiment.
[0018]
The air belt device 1 includes an air belt 2, a tongue 5 to which one end of the air belt 2 is connected, a buckle device 4 to which the tongue 5 latches, a webbing 2a to which the other end of the air belt 2 is connected, and the webbing 2a. A through anchor 11 and a roller 12 with a roller 10 for guiding the belt, a shoulder end anchor 13 for connecting the end of the webbing 2a to the vehicle body, a lap belt 3 having one end connected to the tongue 5, and a lap belt 3 A wrap-through anchor 21 and a roller 22 with a roller 20, a frame 25 connecting the rollers 12 and 22, a seat belt retractor 8 for winding the lap belt 3, and the like are provided.
[0019]
The air belt 2 includes an elongated bag and mesh webbing surrounding the bag 2. The bag is formed in a long bag shape with a material that allows gas to pass through (for example, a cloth with a small amount of resin coating). In addition, the constituent material of the bag may be non-breathable or low breathable, and instead, a gas discharge port such as a vent hole for discharging gas from the bag may be provided. The mesh webbing is a belt-like long and thin flat tube. The mesh webbing has a structure that expands and contracts flexibly in the width direction, but hardly expands in the longitudinal direction by applying a heat stretching process or the like.
[0020]
At least a part of the bag is wider than the mesh webbing, and is folded into substantially the same width as the mesh webbing to form an elongated belt. One end of the bag is connected to the tongue 5 so as to communicate with a gas passage (not shown) provided in the tongue 5.
[0021]
The air belt 2 is drawn around the front of the upper body of the occupant obliquely. The webbing 2a is made of a belt made of the same material as a conventional general seat belt. The webbing 2a is connected to the upper end of the air belt 2 by sewing or the like. The webbing 2 a is hung on the roller 10 of the through anchor 11 and drawn downward, hung on the roller 12 and drawn upward, and the upper end of the webbing 2 a is inserted into the opening of the shoulder end anchor 13 and connected to the anchor 13. Has been. The tip of the webbing 2a passes through this opening, and is then overlapped and stitched on the webbing 2a. Reference numeral 14 denotes a suture thread.
[0022]
The lap belt 3 that is routed left and right in front of the occupant's waist is also formed by a belt similar to a general seat belt, and one end of the lap belt 3 is connected to the tongue 5. The lap belt 3 is hung on the roller 20 of the wrap-through anchor 21 and drawn upward, is hung on the roller 22 and drawn downward, and the lower end side of the lap belt 3 is connected to a retractor (ELR) 8 so as to be wound up. ing.
[0023]
The frame 25 connecting the rollers 12 and 22 has a square frame shape, and the rollers 12 and 22 are supported by the frame 25 so as to rotate smoothly. The rollers 10 and 20 are also attached to the through anchors 11 and 21 so as to rotate smoothly.
[0024]
An inflator is connected to or built in the buckle device 4, and a duct (not shown) for guiding gas from the inflator extends to the tongue facing surface of the buckle device.
[0025]
The air belt device configured as described above exhibits the same function as a normal seat belt device when the vehicle is in a steady state. The retracting force (tension) applied to the lap belt 3 by the retractor 8 is also applied to the webbing 2a and the air belt 2 via the roller 22, the frame 25, and the roller 12, and the lap belt 3 and the air belt 2 lightly fit the upper body of the occupant. . When the vehicle encounters an accident such as a collision or falling over a predetermined scale, the inflator is activated and the air belt 2 is expanded. The inflated air belt 2 absorbs an impact applied to the occupant's chest. Since this bag has a relatively large air permeability, when an occupant's load is applied to the inflated bag, the gas in the bag flows out relatively quickly and the impact is absorbed. When the bag has a vent hole or the like, the gas flows out of the vent hole or the like, and the impact applied to the occupant is absorbed.
[0026]
As described above, the mesh webbing of the air belt 2 is hardly stretched in the longitudinal direction of the belt due to, for example, heat drawing. When the bag is inflated, the mesh webbing spreads in the lateral direction. As a result, the mesh webbing shrinks in the longitudinal direction, and the length of the air belt 2 in the longitudinal direction is shortened. As described above, when the length of the air belt 2 in the longitudinal direction is shortened, the air belt 2 comes into close contact with the occupant, and the occupant can be protected extremely reliably. The tension generated by the shortening of the air belt 2 is also transmitted to the lap belt 3 through the roller 12, the frame 25, and the roller 22. That is, when the air belt 2 is shortened, the roller 12, the frame 25, and the roller 22 are pulled up and down, and tension is applied to the lap belt 3, so that the lap belt 3 is in close contact with the waist of the occupant, and the occupant is extremely sure. Protected.
[0027]
In the above embodiment, the lap belt 3 is wound up by the retractor 8, but instead of the shoulder anchor 13, a retractor that winds up the upper end of the webbing 2a is provided, and the end of the lap belt 3 is wrapped around the wrap end. It may be fixed to the vehicle body by an anchor (not shown) or the like.
[0028]
In the present invention, the vehicle body is not limited to a vehicle body member such as a pillar but may be a seat.
[0029]
That is, the through anchor, the shoulder end anchor, the lap through anchor, the retractor, and the wrap end anchor may be attached to a vehicle body member such as a pillar, or may be attached to a seat.
[0030]
【The invention's effect】
As described above, according to the air belt device of the present invention, tension can be applied to the lap belt and the air belt by one retractor. Further, the tension generated when the air belt is inflated can be transmitted to the lap belt so that not only the air belt but also the lap belt can be brought into close contact with the occupant.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an air belt device according to an embodiment.
FIG. 2 is a perspective view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air belt apparatus 2 Air belt 3 Lap belt 4 Buckle apparatus 5 Tongue 7, 8 Retractor 10 Roller 11 Through anchor 12 Roller 13 Shoulder end anchor 21 Lap through anchor 22 Roller 25 Frame

Claims (4)

An inflatable air belt;
A gas generator for supplying and inflating a gas into the air belt;
A tongue to which one end of the air belt is connected;
A lap belt having one end connected to the tongue;
A strip that is connected to the other end of the air belt;
A retractor for winding either the lap belt or the belt-like body;
A lap belt guide capable of moving up and down with the lap belt mounted thereon;
A belt-like body guide that can be moved up and down, and on which the belt-like body is suspended;
A connecting member connecting the lap belt guide and the belt-shaped body guide;
An inflatable belt device. 2. The air belt device according to claim 1, wherein each of the lap belt guide and the belt-shaped body guide is composed of a roller that can rotate freely. 3. A buckle device to which the tongue is mounted is provided, and the buckle device is provided with gas generating means, and a gas passage for guiding gas from the gas generating means to the air belt is provided. An air belt device provided on the buckle device and the tongue. 4. The belt-like body according to claim 1, wherein the belt-like body is passed through a through anchor and drawn downward, and is then hooked on the belt-like body guide and drawn upward. Are connected to either one of
The lap belt is passed through a lap-through anchor and routed upward, and is then hooked by the lap belt guide and routed downward, and its lower end side is connected to either the vehicle body or the retractor. An inflatable belt device.

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