JPH0281747A - Air cushion - Google Patents

Abstract

PURPOSE:To clean generated gas, prevent an outer back from damages, improve safety and provide a compact air cushion by interposing a perforated wall having a filtering function between the outer back of a flexible bag body and at least a flexible member having a gas generating agent attached. CONSTITUTION:In an accident like collision of an automobile or the like an igniter 10 is caused to emit light through a sensor or the like and a gas generating agent 2 attached to one surface of a flexible member of a small back 4 is burnt by fire while the gas generating agent 2 attached to one surface of a flexible member of a medium back 3 is burnt. The fire of the igniter 10 is received by the surface of the flexible member to burn in an instant said agent 2 attached to the surface. Gas generated by the combustion on the surface breaks down the backs 4, 3, passes though a perforated wall 5 of a filter between the back 3 and an outer back 1 and expands in an instant the back 1. The collision of a passenger with an air cushion is buffered by a vent hole 11 of the back 1 and solid residues in the back are blocked by the perforated wall 5 to prevent the back 1 from damages and clean the gas.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an air action for protecting an occupant from impact by being activated in the event of an accident such as a collision in an automobile or the like.

(Prior Art) Air action is a system in which a gas generator is housed in an outer bag formed of a flexible bag, and when a vehicle or the like collides, a gas generator is detected via a sensor and the gas generator is housed in the gas generator. The outer bag is inflated by burning the fuel, and the inflated outer bag protects the occupant.

The above-mentioned air action must be performed in an extremely short time of 30 m5 to 50 m5 from the time of the collision until the outer bag expands. However, because the combustion area of the gas generating agent is small and the combustion rate is not fast,
It is necessary to make the combustion chamber high temperature and high pressure, and for this reason, the above-mentioned gas generator had to be a pressure-resistant container.

Furthermore, since the above-mentioned outer bag is usually made of a woven fabric of organic fibers such as nylon or a film of polymeric materials such as rubber or resin, the material must be heated to an extent that the combustion gas will not damage the woven fabric or film. The temperature must be kept at a low temperature, and a filter section with multiple layers of wire mesh etc. is installed in the gas flow path inside the gas generator to remove solid residues. However, the weight of the multi-layer wire mesh increases the weight of the gas generator itself.

When a conventional air action is shown in FIG. 3, 20 is a gas generator, and the gas generator 20 is made of a pressure-resistant container, with ignition charges 21, 21, 21. A partition wall 24 is provided with an ignition charge storage chamber 22 in which a large number of ignition charge storage chambers 22 are accommodated, and a gas outlet 23 is bored in the outer periphery of the ignition charge storage chamber 22.
1-25.25.25° of the gas generating agent through the
. The gas outlet 29 and the filter section are connected, and 30 is an outer bag fixed to the outside of the pressure container 20.

In the conventional air action system having the above configuration, the igniter 32 is
The ignition powder 2121. stored in the ignition powder storage chamber 22 is ignited by igniting the ignition powder 2121. When ...... burns, the flame passes through the gas outlet 23 provided in the partition wall 24 and enters the combustion chamber 2.
6, the gas generating agent pellets l-25 in the combustion chamber 26
, 25, 25, . . . are burned. The pressure at this time reaches approximately 10 kg/ci, and the generated gas passes through the passage 27 of the partition wall 28, passes through the outermost filter section 29, is cooled and filtered, and passes through the gas outlet 30 of the pressure vessel 20. The outer bag 31 is instantly inflated.

[Problem that the invention seeks to solve]

In the conventional air action mentioned above, the weight of the gas generator itself alone is 500 g to 1 kg, so the total weight is 1 kg.
．． It weighs between 5 and 2 kg, and not only is the installation position of such a heavy air action limited, but also
Depending on the location, the installation may affect the performance of automobiles, etc.

Furthermore, in the conventional device described above, the gas generating agent is in the form of pellets, but if the pellets are broken and pulverized by the vibrations of the vehicle, a pressure higher than the set pressure is generated during operation, which exceeds the withstand pressure of the gas generator. In some cases, there was also the problem of destruction of the gas generator.

Therefore, the present inventors solved the above-mentioned conventional problems.

As an air action that eliminates the drawbacks, patent application 1986-1
As the invention of No. 01410, a flexible bag forming an outer bag is provided with at least one flexible member to which a gas generating agent is attached.

The air action proposed above has many advantages such as being able to inflate the outer bag to 30 to 50 m5 without using a pressure vessel. An object of the present invention is to provide an air action that takes into account the treatment of solid residues and the suppression of flames.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the air action according to the present invention includes a flexible member to which a gas generating agent is attached inside a flexible bag forming an outer bag. A porous wall having a filter function is interposed between the flexible bag forming the outer bag and the flexible member to which the gas generating agent is attached. This is its characteristic.

[Effect]

In the air action according to the present invention, at least one flexible member to which a gas generating agent is attached is attached to the outer bag formed of a flexible bag, so that the air action adheres to the flexible member. The gas generated by the ignition of the gas generating agent can destroy the flexible member or inflate the outer bag in a very short time by passing through the arbitrarily drilled hole. Since a porous wall with a filtering function is interposed between the bag and the flexible member to which the gas generating agent is attached, the solid residue caused by the destruction of the flexible member is removed by the porous wall having the filtering function. The porous walls also serve to extinguish flames caused by ignition of the gas generating agent.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

Reference numeral 1 denotes an outer bag formed of a flexible bag, in which gas generating agents 2, 2, 2 . A bag-shaped flexible member 3 (hereinafter referred to as the middle bag 3) having ...... attached to the inner surface is arranged, and a gas generating agent 2.2, 2, 2 is placed inside the middle bag 3. ．． A bag-shaped flexible member 4 (hereinafter referred to as a small bag 4) having ... attached to its inner surface is arranged.

5 is a porous wall having a filter function that is interposed between the nuclear outer bag 1 and the inner bag 3 in the outer bag 1;
and a retainer 6 by overlapping each end of the small bag 4.
At the top, a plurality of rods 8 are hung vertically from the periphery of the retainer ring 7.
, 8, 8. . . . , the overlapping end portion and the retainer 6 are penetrated, and the above-mentioned spring rod 8 is inserted from below the retainer 6.
, 8, 8°...Natsuto 9.9.・・・・・・
are screwed together to form the outer bag 1 and the porous wall 5. The inner bag 3 and the small bag 4 are fixed to the retainer 6. 10 is an igniter connected to a sensor provided on a vehicle body such as an automobile.

Then, the middle bag 3 to which the above-mentioned gas generating agent was attached
The material of the small bag 4 is not particularly limited and may be the same as the material of the outer bag 1, such as woven organic fibers such as nylon or rubber.

There is a film made of organic polymer such as resin.

Further, the gas generating agent 2, 2, 2.・・・・・・
- is uniformly attached to the flexible member forming the medium bag 3 and small bag 4 using an adhesive, and preferably has a small particle size of about 0.1 mmφ to 2Mφ, Good ignitability, open combustion speed in air is 10mm/
sec or more is preferable. For example, black powder, B-
Examples include gas generating agents based on heating elements such as P, O, and the like. Further, the bonding method is such that after applying the adhesive to the inner surface of the flexible member, the gas generating agent 2.2, 2.・・・・・・
A good method is to sprinkle and glue. The adhesive at this time may be a conventional organic adhesive.

According to the above method, the combustion area is increased, and the gas generating agents 2, 2, 2. Since the .

The material of the porous wall 5 having a filter function may be activated carbon fiber or a high-strength fiber such as aramid coated with activated carbon, etc., and the density of the pores may be determined by taking into account the pressure drop of the gas. good. Alternatively, a steel bag net may be used.

In this embodiment, as described above, when an accident such as a collision occurs with an automobile, the igniter 10 is ignited via a sensor, etc., and the flame attaches to the surface of the flexible member forming the small bag 4. Gas generating agent 2, 2, 2. ...
... is burned, and at the same time the gas generating agent 2, 2, 2. adhering to the surface of the flexible member forming the inner bag 3 is burned. ...
The flame of the igniter 10 is received by the surface of the flexible member, and the small particles of the gas generating agent 2, 2, 2, .・・・・・・
... can be burned in an instant. The gas generated by this surface combustion destroys the small bag 4 and the medium bag 3 and passes through the porous wall 5 having a filter function interposed between the medium bag 3 and the outer bag 1, and passes through the outer bag 1. It inflates instantly.

When the occupant collides with the inflated air cushion, the gas vent hole 1 provided in the outer bag 1
1JH1i by 1.11.

The solid residue caused by the destruction of the small bag 4 and the medium bag 3 described above is blocked by the porous wall 5 having a filter function, and the gas acting on the outer bag 1 is the gas from which the residue has been removed, so the solid residue is removed from the outer bag 1. 1, and the gas produced by combustion can be cleaned by passing through the porous wall 5 having a filter function.Furthermore, the flame at the time of ignition is also filtered by the porous wall 5. The flame is extinguished and the outer bag 1 is not affected in any way.

As mentioned above, this embodiment allows the outer bag to be deployed and inflated without using the conventionally required pressure vessel, so it can be used as an air cushion to make it lighter and more compact, so it can be used in automobiles, etc. Mounting on the holder provides freedom of position.

Moreover, gas generating agent 2, 2, 2. ...... is attached to the flexible members that form the small bag 4 and the medium bag 3, so air action can be used in automobiles! When the bag 31z is fixed, it is difficult to separate due to vibration, and the pressure inside the combustion chamber depends on the breaking pressure of the small bag 4 and the medium bag 3 and always operates in the same state.

In this embodiment, the small bag 4 and the medium bag 3 are provided in the outer bag 1 in duplicate to increase the combustion surface area, but the flexible member to which the gas generating agent is attached is placed inside the outer bag 1.
It works well even if it is only a small part.

Furthermore, the small bag and medium bag are not limited to bags, but may be ones with a large number of holes in order to reduce solid residue, or even rectangular membrane-shaped bags. Good too.

〔Effect of the invention〕

In the air action according to the present invention, at least one flexible member to which a gas generating agent is attached is installed inside the flexible bag forming the outer bag, so that the gas generated by combustion of the gas generating agent is The outer bag is inflated, and a porous wall with a filter function is interposed between the outer bag and the flexible member to which the gas generating agent is attached, so that the gas that is destroyed by the combustion is removed. Removes solid residue from flexible members or generated harmful gases,
In addition to cleaning the generated gas, the porous wall also has an extinguishing effect, and by interposing the porous wall with the filter function, it prevents damage to the outer bag and protects the occupants. This ensures safety against generated gas.

Furthermore, since the present invention does not require a pressure vessel, the air action can be made smaller and lighter, and as a result, it also has the effect of providing greater flexibility in attaching the air action to the vehicle body.

[Brief explanation of the drawing]

FIG. 1 shows the large surface of an air action according to an embodiment of the present invention. 1: Outside back 2.2,2. ......: Gas generating agent 3: Medium back
4: Small bag 5: Porous wall with filter function

Claims (1)

[Claims] At least one flexible member to which a gas generating agent is attached is attached to the flexible bag forming the outer bag, and the gas generating agent is attached to the flexible bag forming the outer bag. An air cushion characterized in that a porous wall having a filter function is interposed between the flexible member and the flexible member.