JP2006175965A - Roof airbag system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roof airbag system capable of surely protecting occupants if a vehicle is overturned or under a similar condition. <P>SOLUTION: A bag body for the airbag system formed by sewing a basic fabric 15 includes: roof airbag bodies 6A, 6B and 6C arranged inside a cabin of a ceiling member 2 of the vehicle 4; inflators 7A, 7B for ejecting pressurized fluid so as to inflate and deploy the roof airbag bodies 6A, 6B and 6C; and heat insulating sheets 3A, 3B and 3C, arranged between the ceiling member 2 and the roof airbag bodies 6A, 6B and 6C, for reducing heat transfer from the ceiling member 2 to the roof airbag bodies 6A, 6B and 6C. The basic fabric 15 including conductive fibers are woven in the roof airbag bodies 6A, 6B and 6C. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a roof airbag device mounted on a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, various airbag devices for protecting a passenger's body from an impact at the time of an automobile collision or the like have been used.

  For example, in a driver's seat, a driver's seat airbag that inflates and deploys from the center of rotation of the steering wheel to the driver's side (see, for example, Patent Document 1), and a passenger's seat airbag device that inflates and deploys from the instrument panel to the passenger's seat side ( For example, refer to Patent Document 2), and various other airbag devices such as a side airbag device and a curtain airbag device are used.

Japanese Patent No. 3028524 (FIG. 2) JP-A-9-48305 (FIG. 17)

  However, in the event of a major accident in which a large external force is applied to the vehicle, such as a vehicle body rollover due to a collision or a falling heavy object such as a fallen tree, the vehicle's ceiling member breaks and deforms due to the impact, and the passenger's head moves from overhead to head. There is a possibility of contact. The above-described conventional airbag device does not particularly take into account such a problem, and is not necessarily sufficient from the viewpoint of reliable protection of the occupant's head.

  An object of the present invention is to provide a roof airbag device that can reliably protect the head of an occupant when the vehicle rolls over.

  In order to achieve the above object, a roof airbag device according to the present invention is provided on a ceiling portion of an automobile, and is composed of a bag airbag body formed by sewing a base fabric, and a roof airbag body. And an inflator for ejecting a pressure fluid for causing the pressure fluid to flow.

  As a result, the roof airbag body is instantly inflated by the inflator even when the vehicle body rolls due to a collision or when the vehicle body frame bends due to falling heavy objects such as fallen trees and the ceiling member comes into close contact with the occupant's head. By deploying, the head of the occupant can be reliably protected from a direct collision with the ceiling member, and the safety performance of the automobile can be significantly improved.

  In the roof airbag device of the present invention, it is desirable that the roof airbag main body is disposed between a ceiling member and an interior skin member of the automobile.

  As a result, the roof airbag body is covered with the interior skin during normal operation, so that the aesthetics of the indoor space is not impaired. For example, if the roof airbag body is joined to the ceiling member side with a joining member, it rapidly expands. Even when deployed, it can be deployed at an appropriate position relative to the head of the occupant without being displaced.

  In the roof airbag device of the present invention, it is desirable that the roof airbag main body is provided for each occupant to be protected.

  As a result, it is possible to inflate and deploy only the roof airbag main body at the required location according to the actual number of passengers and their arrangement, and the inflated deployment to the occupant side by eliminating unnecessary inflation in the direction of no occupants. The completion time can be shortened, and safety can be further improved.

  The roof airbag device of the present invention preferably includes a heat insulating means provided between the ceiling member and the roof airbag main body to reduce heat transfer from the ceiling member to the roof airbag main body.

  This reduces the heat transfer to the indoor side of the radiant heat received by the ceiling member from the sun in fine weather, thereby preventing thermal damage to the roof airbag main body and ensuring the comfort of the ride by preventing the indoor temperature from rising. .

  In the roof airbag apparatus of the present invention, the heat insulating means is preferably a bag body in which a gel-like heat insulating material is injected.

  Thereby, the gel-like heat insulating material in a heat insulating sheet functions also as an impact buffering material, and can improve the head protection function of the airbag apparatus for roofs.

  In the roof airbag device of the present invention, the roof airbag body preferably includes a base fabric in which conductive fibers having conductivity are woven.

  Thereby, even if static electricity is generated in the base fabric of the airbag main body for roof, it is possible to reduce the ground potential through the conductive fiber or to neutralize static electricity charged by corona discharge.

  In addition, the roof airbag device of the present invention preferably has an earth circuit that is connected to the conductive fiber and electrically grounded.

  As a result, the static electricity generated in the roof airbag body is immediately discharged to the ground via the ground circuit, so that the static electricity can be reliably prevented from being charged and the discharge path is determined in this way. It is possible to prevent electrical leakage to surrounding electrical components.

  In the roof airbag apparatus of the present invention, it is desirable that the conductive fiber includes a fiber obtained by kneading and spinning a color pigment and a carbide in a polymer stage or a spinning stage.

  Thereby, since the colored conductive fiber can be easily distinguished from other normal fibers, it is possible to eliminate work errors in the manufacturing process and improve work efficiency. Further, high conductivity is imparted to the carbide, and static electricity can be neutralized and removed more efficiently.

  In the roof airbag apparatus of the present invention, it is preferable that the base fabric has a maximum friction band voltage measured by a friction band voltage measurement method defined in JIS L 1094, which is smaller than 100V.

  Thereby, the influence by the charging of the base fabric of the roof airbag main body can be surely reduced.

  In the roof airbag apparatus of the present invention, it is desirable that the maximum frictional voltage is less than 50V.

  As a result, the maximum frictional voltage is less than 50 V, and the influence of the static electricity on the base fabric of the roof airbag main body can be greatly reduced.

  ADVANTAGE OF THE INVENTION According to this invention, a passenger | crew's head can be reliably protected, for example at the time of a rollover of a motor vehicle.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a side cross-sectional view for explaining a storage state of a roof airbag device according to an embodiment of the present invention before being mounted on a vehicle and deployed, and FIG. 2 is a state in which the roof airbag device is deployed. It is a sectional side view to explain.

  1 and 2, a roof airbag device 1 is arranged on the indoor side of a ceiling member (ceiling steel plate) 2 and is configured to be deployable toward the head of an occupant. In other words, the roof airbag apparatus 1 includes a heat insulating sheet (heat insulating means) 3A, 3B, 3C between a ceiling member 2 of a vehicle body of an automobile (vehicle) 4 and an interior skin (interior skin member) 5 covering the interior side of the vehicle. And roof airbag bodies 6A, 6B, 6C are stored in a stacked state, and inflator 7A, 7B for injecting pressure fluid (gas) for inflating and deploying the roof airbag bodies 6A, 6B, 6C in the vicinity thereof. Is provided. In the illustrated example, the seats 8 are arranged in three rows in the front-rear direction in the interior of the automobile 4, and each of the front row 9 including the driver's seat, the central row 10, and the rear row 11 is individually configured. Roof airbag main bodies 6A, 6B, 6C and heat insulating sheets 3A, 3B, 3C are arranged. The heat insulating sheets 3A, 3B, 3C are provided in a state of being sandwiched between the ceiling member 2 and the roof airbag main bodies 6A, 6B, 6C.

  An inflator 7A for the front row 9 is provided between the roof airbag bodies 6A and 6B for the front row 9 and the center row 10, and the front row roof airbag main body 6A is provided via the gas inflow passage 6a. Is connected to the gas distribution channel. An inflator 7B serving as both the central row 10 and the rear row 11 is provided between the roof airbag main bodies 6B and 6C in the central row 10 and the rear row 11, and both the roof airbag main bodies 6B and 6C are provided. Each is connected to a gas distribution path via a gas inflow path 6a. In addition, the attachment location of each inflator 7A, 7B is not restricted between the ceiling member 2 and the interior skin 5, and if it is near each airbag main body 6A, 6B, 6C, A pillar 12 and B pillar 13 C pillar 14 etc. may be sufficient.

  Each of the roof airbag main bodies 6A, 6B, 6C has a configuration in which three airbag bag bodies 16 are formed by sewing the base fabric 15 and forming a long and narrow bag shape substantially the same as the vehicle width. Yes. Each airbag bag body 16 is arranged so as to be provided side by side in the vehicle front-rear direction in the direction of passing in the vehicle width direction in a state where the air inside the bag body 16 is flattened. In each of the air bag main bodies 6A, 6B, 6C for roofs, the three airbag bag bodies 16 communicate with each other through the gas flow path 6b at the end thereof, and the inflators 7A, 7B to be connected are connected. The gas can be sequentially introduced into all three from the inside.

  Further, in each of the roof airbag main bodies 6A, 6B, 6C, conductive fibers having conductivity are woven into the base fabric 15, and any of these conductive fibers is connected to a ground wire (not shown) (inflators 7A, 7B). In order not to interfere with the inflator 7A, 7B, it is electrically connected to an earth circuit composed of a metal vehicle body and the like and finally grounded.

  Each of the heat insulating sheets 3A, 3B, 3C is a sheet body made of a material having an endothermic effect, and is formed to be larger than each of the roof airbag bodies 6A, 6B, 6C located below the roof body. The member 2 is provided so as to cover almost the entire indoor surface. Thus, heat transfer from the ceiling member 2 to the roof airbag main bodies 6A, 6B, 6C is reduced.

  In addition, the interior airbag 5 is broken when the roof airbag main body 6A, 6B, 6C is inflated or is opened to the passenger compartment side so that the roof airbag main body 6A, 6B, 6C is placed in the vehicle interior. A tear line (expected fracture line: not shown) that allows expansion is formed. The extending direction of the tear line only needs to be provided in an appropriate direction so that the roof airbag main bodies 6A, 6B, and 6C can be easily inflated and deployed.

  Then, in the roof airbag device 1, the inflators 7 </ b> A and 7 </ b> B are ignited and actuated by a detection sensor (not shown) (which may also be used as another airbag device) at the time of a collision with the automobile 4. When gas flows into the air bag bodies 6A, 6B, 6C, the air bag bodies 16 of the roof air bag bodies 6A, 6B, 6C start to inflate, and the tear line of the interior skin 5 as shown in FIG. And is deployed downward from the indoor side of the ceiling member 2 to catch the head of the occupant.

  The effects obtained by the roof airbag device 1 of the present embodiment configured as described above will be described in order.

(1) Effect of inflating and deploying Even when the vehicle body rolls due to a collision or when a heavy body such as a fallen tree falls and the vehicle body frame bends and the ceiling member 2 approaches the occupant's head, the roof airbag body 6A, By inflating and deploying 6B and 6C instantaneously, the head of the occupant can be reliably protected from the ceiling member 2, and the safety performance of the automobile 4 can be significantly improved. This is particularly useful for light vehicles that are relatively easy to roll over due to a collision because of the low vehicle weight. Moreover, the roof airbag bodies 6A, 6B, 6C having the above-described configuration are manufactured because it is not necessary to fold and store the roof airbag bodies 6A, 6B, 6C in the shape of a bellows or a roll unlike other airbag bodies (driver airbag bodies, etc.). There is an advantage that the installation work is easy and the production cost can be relatively suppressed.

  Further, the roof airbag main bodies 6A, 6B, and 6C are divided into three occupant row units of the front row 9, the center row 10 and the rear row 11, and the inflators 7A and 7B are arranged for each gas flow path (front row). Since each of the individual distribution paths of the roof airbag main body 6A and the two distribution paths of the central row roof airbag main body 6B and the rear row roof airbag main body 6C are provided) The roof airbag main bodies 6A, 6B, and 6C can be inflated and deployed only in the necessary distribution channels according to the actual number of passengers and their arrangement.

  In other words, in a control device (not shown), if the number and arrangement of passengers actually on board are known by manual setting or detection of presence / absence of passengers by means of seat sensors, the roof airbag above the passengers The inflator can be efficiently controlled by deploying only the main body, avoiding deployment in a seat without an occupant. For example, in the case of this embodiment, when the occupant is only the driver, only the front-row roof airbag body 6A is deployed by manual setting or seat sensor detection, and the other roof airbag bodies 6B and 6C are deployed. Can be avoided.

  In addition, the roof airbag main body has a configuration in which the distribution route is divided (in this embodiment, divided into two) rather than a single configuration, so that the expansion and deployment are completed by reducing the volume of each. Time can be shortened and safety can be further improved. This speed of expansion and expansion can also be obtained by increasing the efficiency of the operation of the inflator (avoid wasteful power consumption).

  Considering the above effects, it is most preferable to divide the distribution route of the roof airbag main body for each occupant individual, which is the minimum unit, and to provide an inflator for each, but as in the present embodiment as necessary. A configuration in which two or three divided passengers are connected and connected together may be configured, and may be set in consideration of a balance between the size of the vehicle and the manufacturing cost with respect to the number of passengers. Of course, it is also possible to install one roof airbag main body having almost the same size as the ceiling member 2 and having a distribution channel communicating over the entire surface.

  The roof airbag main body may be configured to be inflated and deployed by inflow of gas from the inflator, and is not limited to a configuration in which a plurality of elongated airbag bags are communicated. For example, you may comprise with one big circular airbag bag body, or you may comprise with the airbag bag body matched with the shape and arrangement | positioning of a passenger | crew's head.

(2) Thermal insulation effect etc. Moreover, since each thermal insulation sheet 3A, 3B, 3C is provided between the ceiling member 2 and each airbag airbag main body 6A, 6B, 6C, the ceiling member 2 is the sun at the time of fine weather, etc. This reduces the heat transfer of the radiant heat received from the room to the indoor side, prevents thermal damage to the roof airbag main bodies 6A, 6B, and 6C, and prevents a rise in the room temperature, thereby ensuring the ride comfort. Then, when the outdoor temperature is low at night or the like, the heat accumulated in the heat insulating sheets 3A, 3B, 3C may be radiated to the outside through the ceiling member 2. Further, since the roof airbag main bodies 6A, 6B, and 6C are disposed between the ceiling member 2 and the interior skin 5, the roof airbag bodies 6A, 6B, and 6C are disposed in the interior skin in a normal operation state. It is covered with 5, and does not spoil the beauty of the interior space.

(3) Static electricity prevention effect by conductive fiber Furthermore, in the roof airbag device 1 of the present embodiment, conductive fiber having conductivity is woven into the base fabric 15 of the roof airbag main body 6A, 6B, 6C. An earth circuit is connected to the conductive fiber and electrically grounded. For this reason, even if static electricity is generated on the base fabric 15 of the roof airbag main body 6A, 6B, 6C, the static electricity charged by the corona discharge of the conductive fiber can be neutralized, or is immediately grounded via the earth circuit. Therefore, static electricity can be reliably prevented. As a result, it is possible to ensure the smooth deployment of the roof airbag bodies 6A, 6B, 6C in the event of a collision with the automobile 4, and to give an uncomfortable feeling even if the passenger touches the roof airbag bodies 6A, 6B, 6C deployed. There is nothing. In addition, since the discharge path is determined by the ground circuit as described above, there is an effect that leakage to surrounding electrical components such as the inflators 7A and 7B can be prevented.

  In order to confirm the electrostatic charge prevention effect as described above, the inventors of the present invention conducted a chargeability test on the base fabric for the roof airbag body of the present invention and the conventional base fabric for airbag body of the present invention. Will be described in detail. The test method is based on JIS L 1094 (Testing method for charging properties of woven fabrics and knitted fabrics), and FIG. 3 is a diagram for explaining a rotary static tester used in JIS L 1094.

  In FIG. 3, the chargeability test of the airbag body base fabric is performed with a rotary static tester (owned by Fukui Industrial Technology Center, manufactured by Koa Shokai Co., Ltd.) based on the triboelectric charge measurement method specified in JIS L 1094. The measurement is repeated five times using a specimen cut to 100 × 120 mm and kept in an environment of 20 ° C. or less for 24 hours in accordance with JIS L 1094, and the maximum value is adopted to show the result. The cotton fabric subjected to the friction test is specified in JIS L 0803 (attached white fabric for dyeing fastness test).

First, a ground circuit was formed in an inflator attachment hole that was subjected to high conductivity processing in a sewing process using a synthetic fiber (nylon 66) sewing thread of 1400 denier generally used for a base fabric for an airbag body. For imparting high conductivity, carbide (grounded with an electrical resistance of about 10 ⁻³ Ω-cm or less) pulverized into fine particles (in units of 1 micrometer) in the single yarn polymer molding stage is kneaded to the fiber core to 5% Invented, artificially twisted yarns and blended yarns entangled with ordinary synthetic fiber materials were used.

  A test specimen for testing is cut into a size of 150 × 150 mm in three directions in any direction from what has been conventionally used to sew with these sewing threads with high conductivity. I got it.

  As shown in FIG. 3, in the chargeability test, the driving force of the motor 54 is transmitted via the V-belt 55, whereby a rotating drum (constant speed rotation) with a test piece (specimen) 57 attached via a metal holder 56. While the body 50 was rotated, it was rubbed for 60 seconds by a friction cloth (cotton cloth) 52 supported by a tension load metal belt 56 with one end fixed and a load 51 applied to the other end. The electrostatic charge voltage was measured by a power receiving unit (detector) 53.

  FIG. 4 is a result of charging test of the airbag body base fabric carried out by the rotary static tester shown in FIG. 3, and the results of the examples and comparative examples of the roof airbag body base fabric of the present invention are shown. Indicates. In the determination shown in FIG. 4, the case where the result of the charging test does not satisfy 50V or less is indicated by x, and the case where the result sufficiently satisfies 50V or less is indicated by ◎.

  (Example 1) A test piece was prepared by using a high-conductivity fiber bundle 1400 denier for every 25 mm of base fabric and stitching it with a normal washing and drying process.

  (Example 2) Under the same conditions as described above, a 900 denier ring was sewn and sewn up, and then a silicon base emulsion was applied with a comma coater to give a coating treatment, followed by drying curing at 200 ° C. for 15 minutes to prepare a test piece.

  In (Example 3), in addition to the above-mentioned conditions, 900 denier ring-sewing was performed, and after sewing, a two-component mixed type silicone base elastomer was applied by a knife coater and coated, and then dried at 200 ° C. for 15 minutes. A test piece was prepared.

  Moreover, about Examples 1-3, the test about heat insulation was also performed. As a test method, 100 CC of heat absorbing gel was injected and sealed on the inner surface of the upper layer side of a two-layer bag-like fabric of 300 × 300 mm size placed under a normal infrared irradiation lamp (200 watts), and a heat source The inner surface temperature of the lower layer side is measured with a thermometer after being left for 30 minutes after being separated from 500 mm. In the evaluation criteria, those that have risen by 10 ° C. or more from the initial temperature are indicated as x, and those that are 10 ° C. or less are indicated by ○.

  (Comparative Example 1) At the time of driving a base fabric in a water jet loom, it is usually sewn by ring stitching at 1400 denier, and then a two-component mixed type silicon base elastomer is applied by a knife coater to be coated at 200 ° C. × 15 A test piece was prepared by performing a partial drying cure.

  (Comparative Example 2) A commercially available non-coated airbag fabric was used, and a test piece was produced by ring-sewing with a 1400 denier sewing thread.

  (Comparative Example 3) A commercially available non-coated airbag fabric was used, and a test piece was prepared by sewing with a 900 denier sewing thread.

  (Comparative Example 4) was woven by a commercially available water jet weaving method, then cut from a silicon elastomer-coated and heat-shrink stabilized treatment at 200 ° C. for 15 minutes, and a 900 denier sewing thread A test piece was prepared by sewing.

  (Comparative Example 5) is a non-coated fabric woven by a commercially available Lapier method of weaving. After being washed three times, it was cut naturally dried and sewn with a 900 denier sewing thread to produce a test piece. did.

  As shown in the results of FIG. 4, in any of the comparative examples, the amount of electrostatic charge is much higher than the 50 V level that satisfies the standard, and it is clear that the chargeability is strong. On the other hand, in any of the embodiments according to the present invention, the maximum withstand voltage in the warp direction and the maximum charged voltage in the weft direction are lower than 50 V, which is smaller than 100 V, which can constantly obtain the effect of preventing charged voltage. It was confirmed that

(4) Work efficiency improvement effect by colored fibers Further, according to the roof airbag device 1 of the present embodiment, the conductive fibers are colored by kneading and spinning colored pigments and carbides at the polymer stage or the spinning stage. Since the conductive fiber can be easily distinguished from other normal fibers, the working efficiency can be improved.

  That is, the base fabric 15 is usually formed by a yarn-making process in which fibers are spun, a weaving process in which warp and weft are interwoven, a drawing process in which a pattern is drawn on the base cloth 15 according to the shape of the bag, and cutting is performed along the drawn pattern. A cutting process for performing a predetermined process, a process for applying a predetermined member assembling process, a sewing process for stitching the weaving directions of the base fabric subjected to the predetermined process into a bag shape, so that the bag can be deployed in a predetermined order The airbag device is completed by a folding process for folding and restraining or holding the shape, and an attaching process for attaching the stored bag as a finished airbag at a predetermined attachment angle. By using colored conductive fibers as reference lines indicating the weaving direction in these drawing process, cutting process, stitching process, folding process, attachment process, etc., even a non-skilled person can easily identify the weaving direction without making a mistake. Therefore, there is an effect that the working efficiency of each process can be increased.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention. Hereinafter, such modifications will be described.

  FIG. 5 is a front cross-sectional view illustrating a partially expanded state in the upper portion of the driver's seat in the stowed state before being attached to the automobile and deployed in the roof airbag device of the present modification. The point in which this modification differs from the above embodiment is mainly the configuration of the roof airbag main body and the heat insulating sheet, and the difference will be mainly described below. In FIG. 5, parts that are the same as those in the above embodiment are given the same reference numerals, and descriptions thereof are omitted as appropriate.

  In FIG. 5, the roof airbag main body 22 provided in the roof airbag device 21 of the present modification is formed into an elongated bag shape having a length substantially the same as the longitudinal length of the ceiling member 2 by sewing the base fabric 15. There are five airbag bags 23 (only two are shown in the figure), and each airbag bag 23 is arranged so as to pass in the vehicle front-rear direction with the air inside. It is provided side by side in the width direction. The five airbag bags 23 communicate with each other at the both ends and the central portion of the internal fluid flow path, and pressure fluid is supplied from the inflator 24 connected through the gas inflow path 6a to all the five interiors. It is possible to flow in sequentially.

  The heat insulating sheet (heat insulating means) 25 is a bag body in which two sheets of a heat insulating sheet base fabric 26 are overlapped, and a peripheral portion and a central side portion are joined together by sewing or the like to form a plurality of small chambers. A sheet-like heat insulating material 25a is injected to form a thick sheet.

  And the anchor bolt (joining member) 27 fixed to the ceiling member 2 penetrates the both edge parts of the airbag main body 22 for a roof, and the heat insulation sheet 25 in the vehicle width direction, respectively, and screws and nuts the two nuts 28 between them. Are joined together. Further, the anchor bolt 27 is joined to the cushioning material 30 and the interior skin 5 via the bracket 29, that is, the anchor bolt 27 is in order from the indoor side surface of the ceiling member 2 to the heat insulating sheet 25, the roof airbag main body 22, The buffer material 30 and the interior skin 5 are joined and fixed. Further, a tear line (not shown) that allows the roof airbag main body 22 to expand into the vehicle interior is also formed in the interior skin 5 in this modified example.

  When the roof airbag device 21 is operated due to the collision of the automobile having the above-described configuration, the five airbag bag bodies 23 start to expand all at once, breaking the tear line of the interior skin 5 and the ceiling. The member 2 is developed downward from the whole and receives the head of the occupant.

  According to the roof airbag device 21 of this modification as described above, the roof airbag main body 22 is joined by the anchor bolt 27 which is a joining member, so that even if the roof airbag device 22 is suddenly inflated and deployed, the positional deviation occurs. It is possible to deploy at an appropriate position with respect to the head of the occupant. Moreover, the gel-like heat insulating material 25a in the heat insulating sheet 25 also functions as an impact buffering material, which can absorb the impact on the head of the occupant and improve the head protecting function of the roof airbag device 21.

  Further, in the above configuration, the anchor bolt 27 that directly contacts and joins the roof airbag main body 22 functions as an earth circuit that is electrically grounded by being fixed to the ceiling member 2, and is generated in the base fabric 15. The discharged static electricity can be surely discharged to the ground, and leakage to the inflator 24 can be prevented.

It is a sectional side view explaining the accommodation state before deployment of the airbag apparatus for roofs by one embodiment of the present invention. It is a sectional side view explaining the expansion | deployment state of the airbag apparatus for roofs shown in FIG. It is a figure explaining the rotary static tester used for the electrification test. It is a figure showing the charging property test result of the base fabric for airbag main bodies implemented with the rotary static tester shown in FIG. It is an expanded sectional view showing the accommodation state in different modifications, such as the arrangement direction of a bag.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roof airbag apparatus 2 Ceiling member 3A-C Thermal insulation sheet (thermal insulation means)
4 automobile 5 interior skin 6A to C roof airbag body 7A, B inflator 9 front row 10 center row 11 rear row 15 airbag body base fabric (base fabric)
DESCRIPTION OF SYMBOLS 16 Airbag bag body 21 Airbag apparatus for roofs 22 Airbag main body for roofs 23 Airbag bag body 24 Inflator 25 Heat insulation sheet (heat insulation means)
25a Gel-like heat insulating material 27 Anchor bolt (joining member)

Claims (10)

An air bag main body for a roof, which is provided on a ceiling portion of an automobile and includes a bag body obtained by sewing a base fabric;
A roof airbag device having an inflator for ejecting a pressure fluid for inflating and deploying the roof airbag main body. The roof airbag apparatus according to claim 1,
The roof airbag device according to claim 1, wherein the roof airbag body is disposed between a ceiling member and an interior skin member of the automobile. The roof airbag apparatus according to claim 1 or 2,
The roof airbag apparatus is provided for each occupant to be protected. The roof airbag apparatus according to claim 1,
A roof airbag device comprising a heat insulating means provided between the ceiling member and the roof airbag main body for reducing heat transfer from the ceiling member to the roof airbag main body. The roof airbag apparatus according to claim 4,
The air bag device for roofs, wherein the heat insulating means is a bag body in which a gel heat insulating material is injected. The roof airbag device according to any one of claims 1 to 5,
The roof airbag device according to claim 1, wherein the roof airbag body includes the base fabric in which conductive fibers having conductivity are woven. The roof airbag apparatus according to claim 6,
A roof airbag device having an earth circuit that is electrically connected to the conductive fiber and electrically grounded. The roof airbag device according to claim 6 or 7,
The roof fiber airbag device characterized in that the conductive fiber includes a fiber obtained by kneading and spinning a color pigment and a carbide in a polymer stage or a spinning stage. The roof airbag device according to any one of claims 6 to 8,
The roof airbag apparatus according to claim 1, wherein the base fabric has a maximum frictional band voltage measured by a frictional band voltage measurement method defined in JIS L 1094, which is smaller than 100V. The roof airbag apparatus according to claim 9,
The roof airbag apparatus according to claim 1, wherein the maximum frictional voltage is less than 50V.

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