JPH09329172A - Shock absorbing air bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make shock absorbing performance excellent, and further facilitate arrangement and removal in a shock absorbing air bag equipped with an exhaust valve by which liquid is exhausted by the compression of an air bag main body, by arranging an underlaying mat which can be extended in a colliding direction under the air bag main body. SOLUTION: In a shock absorbing air bag, an air bag main body 1 is equipped with a liquid filling valve 3 for filling liquid and an exhaust valve 2 for exhausting liquid, and a relief valve 4 is arranged by which liquid is released from the air bag main body 1 when excessive liquid is fed from the liquid filling valve 3. Then, an underlaying mat 7 is arranged under the air bag main body 1. This underlying mat 7 is so formed that it can be extended in a colliding direction, and extended in the colliding direction when an automobile is collided with, so that the shock absorbing air mat main boy 1 is moved in the colliding direction. Therefore, the automobile collided with may not be run into the air bag main body 1, and safety for occupants is ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorbing airbag, and more particularly to a shock absorbing airbag which has excellent shock absorbing power and can be easily installed and withdrawn.

[0002]

2. Description of the Related Art For example, a shock absorbing cushion is placed on a fence for separating a passenger seat from a course in a car race track or at a corner of the course so that the car does not jump out of the course even if the car collides.

[0003] Conventionally, such a cushion for absorbing shock is basically made of a container filled with water or sand. A heavy object for fixing the container is installed behind the shock absorbing container, or installed on the course side of the fence to prepare for a car collision. For this reason, when a vehicle collides, the impact is mitigated by the water layer or sand of the container, and the structure is such that the container rupture does not cause a reaction to the colliding vehicle.

[0004]

However, the shock absorbing container using water or sand as described above is not sufficiently shock-absorbing and is heavy because it is used for water supply / drainage and sand filling. And there is a drawback that it is difficult to remove. Further, there is a possibility that the vehicle may ride on the upper part when the vehicle collides. For this reason, for example, there is a risk of overcoming the fence and jumping out of the course.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a shock absorbing airbag which has a better shock absorbing property than conventional ones and can be easily installed and withdrawn. .

[0006]

In order to solve the above problems, an impact absorbing airbag according to the present invention is provided with an airbag body capable of being filled with gas, and the airbag body is provided with the airbag body. An impact absorbing airbag having an exhaust valve for discharging gas by compression, characterized in that an underlay mat that is extendable in the longitudinal direction of the collision direction is provided at the bottom of the airbag body.

According to the present invention, when a shock of a collision of an automobile or the like is suddenly applied to the shock absorbing airbag, the airbag is compressed, and as a result, gas is promptly discharged from the exhaust valve. For this reason, there is an advantage that the impact can be mitigated by discharging the gas layer and further the gas, and in addition, since the gas is discharged, the collision vehicle does not bounce in the direction opposite to the collision direction. in addition,
It is easy to install because it is filled with gas and expands. In addition, when the gas is withdrawn, the gas can be discharged and folded for transportation and storage. Further, when the automobile collides, the underlay mat expands, whereby the collision is further mitigated, and the automobile can be prevented from riding on the upper part of the airbag, so that the shock can be effectively absorbed. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an embodiment of a shock absorbing air mat according to the present invention, and FIG. 2 is a partial side view and a partial sectional view of the embodiment, but as is clear from these drawings, The shock absorbing airbag according to the present invention comprises an airbag body 1 filled with air. This airbag body 1
Is a plurality of air chambers 11, 12, 1 in this embodiment.
It is divided into 3, 14, and 15 and each air chamber 1
An exhaust valve 2 is provided in each of 1, 12, 13, 14, and 15. In this embodiment, the exhaust valve is provided on the side surface, but may be provided on the upper portion or on both the upper portion and the side surface.

Further, in this embodiment, the air chamber 1
1, 12, 13, 14, and 15 have a structure in which a communication hole 16 is provided so as to communicate with each other, but the communication hole 16 as described above does not have to be provided in the present invention, and each communication hole 16 does not have to be provided. The chambers 11, 12, 13, 14, 15 may be independent. In the case of having such independent air chambers, the number of air chambers may be decreased or increased depending on the predicted impact magnitude. For example, by providing a fastener F in the air chamber or by lacing (using eyelets at the ends and connecting with ropes), the air chambers 11, 12, 1
It is possible to have a structure in which 3, 14, 15 can be attached to and detached from each other.

Further, the air bag body 1 has a gas injection valve 3 for injecting gas, and when excess gas is sent from the gas injection valve 3, the air bag body 1 is used to discharge the gas. It has a structure provided with a safety valve 4 for letting it escape.

Further, the air bag body 1 is provided with an airtight zipper 5 at the boundary of the air chambers, and when the shock absorbing air bag is withdrawn, the airtight zipper 5 is opened to rapidly release gas. It can be discharged to the outside.

The exhaust valve 2 may be a mechanical check valve. However, in the case of such a mechanical exhaust valve, the exhaust is slow, the valve part does not bend, it is bulky, hinders storage and transportation, and mechanical parts may scatter during collision, which may be dangerous. There are drawbacks such as

For this reason, it is preferable to use the burst valve 21 as shown in FIGS. The burst valve 21 is made of rubber, for example, and is fixed to the exhaust port 17 of the airbag body 1 by sewing or bonding. Then, when the air pressure inside the airbag body 1 is suddenly increased by the impact, it is ruptured and the inside of the airbag body 1 is communicated with the outside air. In this case, since there is no metal part,
It can be folded small during storage and transportation, and metal parts will not scatter due to impact, improving safety.

The rupture film of the rupture valve 21 may be one kind, but as shown in FIG. 4, rupture films 22, 23 and 24 having different rupture strengths may be provided concentrically. Good. In this case, the burst film 22 at the center has the lowest burst strength, and the burst strength gradually increases. By sequentially adjusting the burst strength of the burst film in this manner, in the case of a small collision, it is possible to control the exhaust gas amount of the gas depending on the magnitude of the impact such as the burst film 22 at the central portion bursts.

Pockets 18 are provided on the collision surface of the airbag body 1 and the end surface opposite to the collision surface, so that the shock absorbing plate 6 having rigidity can be inserted and removed freely (FIG. 1, FIG. 1). 2). The shock absorbing plate 6 can be, for example, a honeycomb plate.

The shock absorbing plate 6 is for absorbing the shock of a collision of an automobile or the like, and compressing the airbag body 1 as uniformly as possible in the collision direction to improve the shock absorbing property.

In the present invention, the air mat body 1
An underlay mat 7 is provided in the lower part of the. This underlay mat 7 can extend in the collision direction,
When an impact occurs, the impact absorbing mat body is extended in the impact direction to move the impact absorbing mat body in the impact direction (Fig. 5).
reference). Therefore, the collided vehicle 9 does not ride on the airbag body 1. If the underlay mat is not extendable in the collision direction, the lower end of the air mat body 1 is fixed to the underlay mat as shown in FIG. This is because there is a possibility that the car 9 that has been ridden will ride on the airbag body 1.

As shown in FIG. 7, the above-mentioned underlay mat 7 is sequentially folded in a double stack, and is constructed by sewing the folded portion 71 with a thread 72. Therefore, when a force is applied in the longitudinal direction, the thread 72 is cut, the folded portion 71 extends, and the mat 7 extends as a whole.

A similar stretchable fiber net 10 is provided on the impact surface of the airbag body 1. In this case, the net 10 can be expanded in the lateral direction (direction perpendicular to the collision direction). Such a fibrous net 10 is similar to that used to capture an aircraft during an aircraft overrun, and wraps the vehicle laterally in a collision to prevent it from jumping out of the shock absorbing mat. It works like this.

In using the impact airbag, a heavy article 8 such as the side opposite to the impact side of the underlay sheet 7 fixed to the lower end of the airbag body 1 is provided.
Alternatively, the airbag is installed in front of the fixed fence F. When the heavy object 8 is provided, the heavy object 8 is placed on the sheet 7. When installed in front of the fence F, the sheet 7 may be folded and placed.

The expansion of the shock absorbing bag can be performed via the gas injection valve 3 and can be performed very easily.
At this time, when excessive gas is injected, the excess gas is released from the safety valve 4.

When the automobile 9 collides with the impact airbag, the impact is first absorbed by the gas filled in the airbag. Further, as the gas in the airbag is discharged from the exhaust valve 2, the impact is further absorbed, and a force for rebounding the vehicle 9 that has collided due to the repulsive force of the gas layer to the rear (direction opposite to the collision direction) is provided. Will be suppressed. Further, the airbag body 1
Is fixed to the underlay mat 7, but since the underlay mat 7 extends in the collision direction, the entire airbag body 1 moves in the collision direction, and the automobile 9 rides on the airbag body 1. Never. in addition,
Since the fiber net 10 is provided on the collision surface of the airbag body 1, there is an advantage that the automobile 9 is not likely to fly out in the lateral direction. Therefore, the automobile 9 does not jump out of the course on the race track, and the safety of the passengers of the automobile 9 is secured.

In this case, when the airbag body 1 has only one air chamber, the impact absorbing bag cannot maintain its shape when the air chamber is destroyed by the impact or the edge of the automobile. However, by providing the air chambers 11, 12, 13, 14, 15 that communicate with each other, even if one of the air chambers is destroyed, the shape can be maintained in the other air chambers, and the shock absorption is further improved. Get better

[0024]

As described above, according to the shock absorbing airbag of the present invention, since the exhaust valve is used,
There is an advantage that the gas in the airbag can be quickly discharged, the shock can be quickly absorbed, and the bounce action can be suppressed to a minimum. Further, since it is a method of injecting gas, it has advantages that it can be easily transported, stored, installed, and withdrawn, and that it can be used in various shock absorbing locations.

[Brief description of drawings]

FIG. 1 is a plan view of a shock absorbing airbag according to the present invention.

FIG. 2 is a partially cutaway side view of the impact absorbing airbag.

FIG. 3 is a sectional view of an exhaust valve.

FIG. 4 is a plan view of an exhaust valve.

FIG. 5 is an explanatory diagram showing a use state.

FIG. 6 is an explanatory view illustrating a state in which the underlay mat cannot be expanded.

FIG. 7 is a diagram schematically showing the structure of an underlay mat and a fiber net.

[Explanation of symbols]

 1 Airbag body 2 Exhaust valve 21 Bursting film 6 Impact absorbing plate 7 Underlay mat 10 Fiber net

Claims (8)

[Claims] 1. A shock absorbing airbag comprising an airbag body which can be filled with gas, and an exhaust valve which is provided in the airbag body and discharges gas by compressing the airbag body. A shock-absorbing airbag characterized in that an underlay mat that can extend in the direction of collision is provided at the bottom of the main body. 2. The shock absorbing airbag according to claim 1, wherein the exhaust valve has a film that bursts due to gas pressure. 3. The shock absorbing airbag according to claim 2, wherein the exhaust valve is a burst film having a structure in which the burst strength increases concentrically from the center. 4. The shock absorbing airbag according to claim 1, wherein the airbag main body is provided with a shock absorbing plate having rigidity on at least a collision side. 5. The shock absorbing air according to claim 1, wherein the airbag main body is provided with a plurality of air chambers arranged in parallel from the collision direction and communicates with each other or is independent of each other. back. 6. The shock absorbing air according to claim 5, wherein the air chambers are independent of each other, and the air chambers can be connected or disconnected in a timely manner depending on a required shock absorbing effect. back. 7. The impact according to any one of claims 1 to 6, wherein the underlay mat is sequentially folded in a double stack and is constructed by sewing the folded portion with a thread. Absorption airbag. 8. The shock absorbing air mat according to claim 1, wherein a fiber net similar to that of the underlay mat is provided on the collision side of the airbag body.