JPH10291457A - Protective bag for occupant head of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag capable of being expanded sufficiently widely along the window of the side section of an automobile and capable of sufficiently reducing the shock applied to an occupant head. SOLUTION: Two nearly fan-shaped synthetic resin sheets 2, 3 are overlapped, the whole peripheral edges are connected by deposition or adhesion of form junctions 11, 12, 13, 14, and junctions 21-37 extended in the vertical direction are provided to form a bag 1. Vertical empty chambers 51-59 are provided between the junctions 21, 22, junctions 23, 24, junctions 25, 26, junctions 27, 28, junctions 29, 20, junctions 31, 32, junctions 33, 34, and junction 35, 36. The upper sections of the empty chambers 51-59 are inserted into an upper empty chamber 60 along the upper edge junction 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective bag for an occupant's head, and more particularly, to a bag that inflates along a window of a side door when a vehicle collides or rolls over.

[0002]

2. Description of the Related Art A bag of this type is disclosed in Japanese Patent Laid-Open No. 6-19 / 1994.
There is a gas bag described in 1365. The gas bag is of a substantially rectangular shape which can be inflated along a side window of a motor vehicle. A tubular portion is provided around four sides of the rectangular bag, and a fiber region is formed in an inner region of the tubular portion. It has a configuration in which a mesh is stretched. The supply of gas into the tubular portion inflates the gas bag along the side window.

[0003] PCT patent application publication WO 95/125.
04, WO 95/21753 describes a safety device in which a curtain is pulled down from a roof between a side window and a head of an occupant in the event of a side collision of an automobile, thereby protecting the head. This curtain is not a bag.

[0004]

Problems to be Solved by the Invention Japanese Patent Laid-Open No. 6-19136
The No. 5 gas bag has a small area when inflated (the area along the window) and can protect only the head at a specific position. The safety devices of WO95 / 12504 and WO95 / 21753 extend the curtain, and cannot sufficiently reduce the impact applied to the head.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bag which can be inflated sufficiently widely along a window or the like on the side of an automobile, and which can sufficiently reduce the impact applied to the occupant's head. I do.

[0006]

SUMMARY OF THE INVENTION A protective bag for a vehicle occupant head according to the present invention is disposed near a crossing corner between a ceiling portion and a side portion in a vehicle interior, and is provided along the side portion by gas introduced. A protective bag for a vehicle occupant head in which two sheets are overlapped and two sheets are linearly joined to form a space filled with gas between the two sheets. The protection bag includes, as the vacant space, at least three vertical vacancies extending along the ceiling and having an upper end connected to the upper vacant space, extending vertically, and having a lower end closed. And a directional vacancy.

In this bag, gas is introduced into the upper vacant space, the gas flows into the vertical vacant space, the upper vacant space and the vertical vacant space expand, and the bag largely spreads along the side of the automobile. . This bag therefore reliably intervenes between the occupant's head and the side of the vehicle, even if the occupant's head is at various positions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) shows a state in which a bag according to an embodiment is expanded (however, gas is not introduced).
(B) is a sectional view taken along the line BB of (a), FIG. 2 (a) is a perspective view of a state in which gas is introduced into the bag and inflated, and FIG. (C) is BB of the same (a).
It is sectional drawing which follows a line and CC line. FIG. 3 is a schematic side view showing an installation position of the bag inside the automobile,
FIG. 4 is a view showing a state in which this bag is inflated in the interior of a car, and FIG. 5 is a sectional view taken along the line V--V in FIG.

In this bag 1, two substantially fan-shaped synthetic resin sheets 2 and 3 are superimposed, and joints 11, 12, 13, and 14 for joining the entire peripheral edges thereof by welding or bonding are provided. It is provided with joints 21 to 38 extending in the direction. In FIG. 1, reference numeral 11 denotes a joint at the upper edge of the sheets 2 and 3; Indicates a part.

The joints 21 to 38 extending in the vertical direction rise upward from the vicinity of the joint 14 at the lower edge of the sheets 2 and 3, but are separated from the joint 11 at the upper edge by a required distance. The upper part of the joint 21 is connected to the joint 12 at the side edge, and the upper part of the joint 38 is connected to the joint 11 at the upper edge.

The joints 22, 23, the joints 24, 25, the joints 26, 27, the joints 28, 29, the joints 30, 3
1, joints 32, 33, joints 34, 35, joint 3
6 and 37, the upper ends thereof are continuous with each other, and the lower ends thereof are joined portions 41, 42, 43, 44, 45, 46, 47, 4
8, 49, whereby vertical vacancies 51 to 59 are provided therebetween.

The upper portions of these cavities 51 to 59 are inserted into an upper vacancy 60 along the upper edge joint portion 11. An opening 60 a for supplying gas into the upper chamber 60 is provided in the seat 2.

Between the joints 22, 23, the joints 24, 25
Between the joints 26 and 27, between the joints 28 and 29,
Fin portions 61 to 68 into which gas is not introduced are provided between the joining portions 30 and 31, between the joining portions 32 and 33, between the joining portions 34 and 35, and between the joining portions 36 and 37.

As is apparent from FIG. 1, the length of the lower edge of the sheets 2, 3 is sufficiently larger than the length of the upper edge. Preferably, the length of the lower edge is 1.0 to the sum of the lengths of the upper edge and both side edges.
2.0 times, especially 1.1 to 1.5 times. The lower edge is an arc or a polygonal shape similar to the arc and is convex downward. The upper edge is an arc or a substantially V-shaped approximation thereof and is concave upward.

In the bag 1 configured as described above, when the bag 1 is inflated, the lower edge 14 is shortened so as to be drawn toward the center, and at the same time, the upper edge 11 forming a substantially V-shaped concave portion is straightened. Change in shape.

The bag 1 is folded so that the lower edge is pulled upward, and as shown in FIGS. 3 to 5, the vicinity of the intersection between the ceiling 71 and the side of the automobile 70, the A-pillars 78 and C It is arranged on a pillar 79. In FIG. 5, reference numeral 72 denotes a door, and 73 denotes a door glass. Reference numeral 74 denotes a main body of the safety device for storing the folded bag and supplying gas into the bag 1 to inflate the bag 1.

In the bag 1 configured as described above, when the vehicle 70 collides sideways or rolls over, gas is supplied from the opening 60a to the upper empty space 60. This gas inflates the upper chamber 60 and the vertical chambers 51 to 59, and the bag 1 expands along the door windows as shown in FIGS. Vacancy 5
Due to the expansion of 1 to 59, the length of the lower edge of the bag 1 (the length along the front-rear direction of the vehicle 1) is shorter than that in the flat case of FIG. The lower edge of the inflated bag 1 extends in a substantially horizontal direction as shown in FIGS. The cavities 51 to 59 extend in the radial direction, and both side edges of the bag extend obliquely along the A pillar 78 and the C pillar 79 of the automobile 70. Since the lower edge of the bag 1 is sufficiently longer than the upper edge, the inflated bag 1
Covers a wide area of the side of the vehicle, and the bag 1 is necessarily interposed between the head H and the side of the vehicle even if the position of the head H of the occupant is various. In addition, since the bag is inflated with gas, the impact applied to the head H can be significantly reduced.

FIG. 6 is a structural view of a bag 1 'according to another embodiment of the present invention, showing a state similar to that of FIG. 1 (a).

In this bag 1 ', a convex portion 80 is projected upward from the upper edge, and the convex portion 80 is provided with an opening 60 for introducing gas.
a is provided. Other configurations are the same as those of the bag 1, and the same reference numerals indicate the same parts.

In the above embodiment, the sheets 2 and 3 are made of synthetic resin. However, sheets made of various materials such as woven fabric impregnated or laminated with resin can be used.
The method of joining the sheets may be sewing.

The above-mentioned bags 1, 1 'have nine vertical vacancies. In the case of a general passenger car, the number of vertical vacancies may be 3 to 20, especially 5 to 15 cavities. preferable.

In the above embodiment, the two sheets 2, 3
However, this may be a single large sheet folded back.

[0023]

As described above, the protection sheet for the head of the vehicle occupant of the present invention can sufficiently protect the head of the occupant of the vehicle even if the position is various.

[Brief description of the drawings]

FIG. 1A is a front view of a bag according to an embodiment,
(B) is a sectional view thereof.

FIG. 2A is a perspective view of an inflated bag 1, and FIG.
Figures and (c) are cross-sectional views thereof.

FIG. 3 is an explanatory diagram showing an arrangement position of a bag 1 in a car.

FIG. 4 is a front view of the inflated bag 1;

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a front view of a bag 1 ′ according to another embodiment.

[Explanation of symbols]

 1, 1 'bag 11-14, 21-38, 41-49: Joints 51-59, 60 Vacancies 60a Openings 61-68 Fins

Continued on the front page (72) Inventor Atsushi Uchiyama 66-19 Kawashimada, Gotemba-shi, Shizuoka Pref. Nagahara 1st B-406

Claims (8)

[Claims] 1. A bag disposed near a crossing corner between a ceiling portion and a side portion in a vehicle interior and inflated downward along the side portion by an introduced gas, wherein two sheets are stacked. A protective bag for the head of an automobile occupant in which a vacant space filled with gas is formed between the two sheets by linearly joining the two sheets together, the protective bag, as the vacant space, extends along the ceiling. An upper vacancy, and an upper end is connected to the upper vacancy, and extends vertically.
A protective bag for an automobile occupant's head, comprising at least three longitudinal vacancies having a closed lower end. 2. The protective bag according to claim 1, further comprising an opening for introducing gas into the upper empty space. 3. A protective bag according to claim 1, wherein each of the seats has a substantially sector shape in which a lower edge is longer than an upper edge. 4. The protective bag according to claim 3, wherein the length of the lower edge is 1.0 to 2.0 times the sum of the lengths of the upper edge and the side edges. 5. The protective bag according to claim 3, wherein the upper edge of the protective bag has a substantially V-shape whose center in the longitudinal direction is lower than both ends, and the lower edge has a polygonal shape in which a plurality of line segments are continuous in a broken line. A protective bag for a head of an automobile occupant, characterized in that: 6. A protective bag for an automobile occupant head according to claim 3, wherein the vertical vacant space extends in a radial direction. 7. The protection sheet for an automobile occupant head according to claim 1, wherein the number of vertical vacancies is 3 to 20. 8. The bag according to claim 1, wherein when the gas is supplied into the bag and the bag is inflated, the lower edge of the bag extends substantially horizontally in a straight line, and A protective bag for the head of a vehicle occupant, characterized in that both side edges extend obliquely along the A pillar and the C pillar of the vehicle, respectively.