JP2011173442A - Side airbag device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side airbag device for a vehicle capable of properly protecting the chest of a passenger not only when the passenger does not move to a vehicle front side with respect to the vehicle at a side collision, but also when the passenger moves to the vehicle front side with respect to the vehicle. <P>SOLUTION: The side airbag device includes an airbag 30 equipped with a main bag 31 and an arm chamber 32. When the passenger P does not move to the vehicle front side at the side collision or the movement amount to the vehicle front side is relatively small, the amount of gas supplied to the arm chamber 32 is made zero or small so that the chest part P1 can be protected with the airbag 30 without excessively pressing an upper arm part P2 with the arm chamber 32. When the movement amount of the passenger P to the vehicle front side at the side collision is relatively large, the amount of gas supplied to the arm chamber 32 is made large so that the chest part P1 moved to the vehicle front side can be protected with the arm chamber 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle side airbag device.

Patent Document 1 discloses a vehicle side airbag device provided with a thickness regulating portion that regulates the thickness dimension of an airbag at a position corresponding to an elbow portion of an occupant's arm to be smaller than other portions. ing. According to the device disclosed in this publication, when a side collision occurs and the occupant is not moving forward with respect to the vehicle, the occupant's elbow is prevented from being excessively pushed inward in the vehicle width direction. Protecting the passenger's chest appropriately.

However, the vehicle side airbag device disclosed in Patent Document 1 has the following problems.
At the time of a collision from the front of the vehicle, the occupant may move forward relative to the vehicle due to the deceleration of the vehicle, and the relative position between the occupant and the airbag may shift. In this case, the occupant's chest that has moved to the front of the vehicle approaches the thickness restricting portion, and the bag thickness on the side of the occupant's chest becomes thin, which may weaken the restraining force of the occupant's chest by the airbag.

Japanese Patent Laid-Open No. 2005-53465

  An object of the present invention is to properly protect the chest of an occupant not only when the occupant is not moving forward with respect to the vehicle in a side collision but also when the occupant is moving forward with respect to the vehicle. An object of the present invention is to provide a vehicle side airbag device.

The present invention for achieving the above object is as follows.
(1) The vehicle side airbag device of the present invention includes:
(A) a gas generator comprising a first gas outlet and a second gas outlet;
(B) a main bag provided with a portion that develops to the side of the chest of the occupant when the occupant is not moving forward of the vehicle with respect to the vehicle by the gas ejected from the first gas ejection port; An arm chamber that is deployed to the side of the upper arm portion of the occupant when the occupant is not moving forward of the vehicle with the gas ejected from the gas outlet of the vehicle,
Have
When the occupant is not moving forward of the vehicle with respect to the vehicle until the position where the occupant's chest is positioned inward in the vehicle width direction of the arm chamber at the time of a side collision, the arm chamber is supplied from the second gas ejection port. The amount of gas is set so that the internal pressure of the arm chamber is lower than the internal pressure of the main bag.
The amount of gas supplied to the arm chamber from the second gas outlet when the occupant moves forward of the vehicle relative to the vehicle to a position where the chest of the occupant is positioned inward in the vehicle width direction of the arm chamber at the time of a side collision Is supplied from the second gas outlet to the arm chamber when the occupant is not moving forward of the vehicle with respect to the vehicle until a position where the chest of the occupant is located at an inner position in the vehicle width direction of the arm chamber at the time of a side collision. The amount is larger than the amount of gas produced.
(2) In the above (1), the airbag further includes a tube connecting the second gas ejection port and the arm chamber.
The tube is produced by sewing a single tube cloth to a main bag cloth for producing the main bag.

According to the vehicle side airbag device of (1), the following effects can be obtained.
When the occupant is not moving forward of the vehicle with respect to the vehicle to the position where the occupant's chest is positioned in the vehicle width direction of the arm chamber at the time of a side collision, the amount of gas supplied from the second gas outlet to the arm chamber is The amount of the inner pressure of the arm chamber is lower than the inner pressure of the main bag. For this reason, when the occupant does not move forward in the case of a side collision or the amount of movement forward of the vehicle is relatively small, the occupant is restrained from being pushed excessively inward in the vehicle width direction by the arm chamber. The chest can be effectively restrained by the main bag.
On the other hand, when the occupant moves forward of the vehicle relative to the vehicle to a position where the chest of the occupant is positioned inward in the vehicle width direction of the arm chamber at the time of a side collision, the amount of gas supplied to the arm chamber from the second gas outlet is reduced. The amount of gas supplied from the second gas outlet to the arm chamber when the occupant is not moving forward with respect to the vehicle until the position where the occupant's chest is positioned inward in the vehicle width direction of the arm chamber at the time of a side collision More than that. Therefore, when the amount of movement of the occupant to the front of the vehicle during a side collision is relatively large, the occupant's chest can be effectively restrained by the arm chamber.
Therefore, the chest of the occupant can be properly protected not only when the occupant is not moving forward with respect to the vehicle but also when the occupant is moving forward with respect to the vehicle.

According to the vehicle side airbag device of (2) above, the following effects can be obtained.
To make a tube, the tube connecting the second gas outlet of the gas generator and the arm chamber of the airbag is made by sewing a single tube cloth to the main bag cloth. A part of the main bag can be used, which is advantageous in terms of the material cost of the tube.

FIG. 3 is a side view of the vehicle side airbag device according to the embodiment of the present invention in a state where the airbag is deployed when there is no or little passenger movement forward. It is a schematic sectional drawing expanded and shown along the AA line of FIG. In the side airbag device for a vehicle according to the embodiment of the present invention, when there is no or little movement of the occupant, (restraint load in the vehicle width direction of the occupant's chest by the airbag)-(the width of the airbag is increased by the occupant's chest) FIG. 6 is a graph showing a relationship of (amount of collapse in the direction) with a solid line when there is a gas supply to the arm chamber and with a dotted line when there is no gas supply to the arm chamber. It is a side view of an air bag deployment state in case a crew member's frontward movement is large of a side air bag device for vehicles of an example of the present invention. It is a schematic sectional drawing expanded and shown along the BB line of FIG. When the occupant's forward movement of the vehicle side airbag device of the embodiment of the present invention is large, (the restraint load in the vehicle width direction of the occupant's chest by the airbag)-(the airbag is moved in the vehicle width direction by the occupant's chest) FIG. 6 is a graph showing the relationship of the amount of collapse) with a solid line when there is a gas supply to the arm chamber and with a dotted line when there is no gas supply to the arm chamber. It is a side view of a gas generator and an air bag of a side air bag device for vehicles of an example of the present invention. For the sake of clarity in the drawing of the gas generator, the gas generator is shown by a solid line. It is a schematic sectional drawing expanded and shown along the CC line of FIG. It is a schematic sectional drawing expanded and shown along the DD line of FIG. It is process drawing which shows the folding method of the airbag of the side airbag apparatus for vehicles of this invention Example. It is process drawing which shows the preparation procedure of the airbag of the side airbag apparatus for vehicles of this invention Example by schematic sectional view. It is the EE sectional view taken on the line of FIG. It is a side view of a gas generator, a seat, and an occupant showing together a connection relationship among a gas generator, a side collision sensor, a front collision sensor, and a control device of a vehicle side airbag device according to an embodiment of the present invention. . It is a flowchart of the control routine of the control apparatus of the side airbag apparatus for vehicles of this invention Example.

  Hereinafter, a vehicle side airbag device (hereinafter also simply referred to as a side airbag device) according to an embodiment of the present invention will be described with reference to the drawings. In the figure, UP indicates the upper side, FR indicates the front of the vehicle, IN indicates the inner side in the vehicle width direction, and OUT indicates the outer side in the vehicle width direction.

  A side airbag device 10 according to an embodiment of the present invention includes a gas generation device 20 and an airbag 30 as shown in FIG. 1, and includes a side collision sensor 40 and a front collision as shown in FIG. Sensor 50 and control device 60.

  For example, as shown in FIG. 1, the gas generator 20 is disposed in a seat back 70 (only a frame is shown). However, the gas generator 20 may be disposed other than the seat back 70 such as the seat cushion 71.

The seat back 70 is used as a backrest of the occupant P. The seat back 70 is disposed at the vehicle rear side end portion of the seat cushion 71 on which the occupant P is seated, and can be tilted and raised in the vehicle front-rear direction with respect to the seat cushion 71. A headrest (not shown) that supports the head of the occupant P is disposed on the upper portion of the seat back 70.

The gas generator 20 is provided to supply gas to the airbag 30 at the time of a side collision (at the time of a side collision). The gas generator 20 may be provided inside the airbag 30 or may be provided outside the airbag 30. The gas generator 20 includes at least one inflator, and includes a first gas outlet 21 and a second gas outlet 22 as shown in FIG.

The first gas jet port 21 and the second gas jet port 22 are provided at different positions of one inflator when the gas generator 20 is composed of one inflator. In the case of a single inflator, one is provided for each of the two inflators. In the illustrated example of the present invention, the gas generator 20 is composed of one inflator provided in the airbag 30, and the first gas outlet 21 and the second gas outlet 22 are provided in one inflator. Show the case.

The airbag 30 is stored (stored) in a folded state in, for example, the seat bag 70. The airbag 30 is inflated and deployed in the vehicle front side and in the vertical direction by the gas ejected (supplied) from the gas generator 20 at the time of a side collision of the vehicle. The airbag 30 is deployed between the occupant P and an unillustrated vehicle interior material (door trim or pillar garnish) outside the occupant P in the vehicle width direction to protect (restrain) the occupant P.
The airbag 30 includes a main bag (first chamber) 31, an arm chamber (second chamber) 32, and a tube 33.

As shown in FIG. 1, the main bag 31 is on the chest P1 side of an occupant (AM50 occupant, the same applies hereinafter) P when the occupant P is not moving forward of the vehicle with respect to the vehicle. It has a part that expands in the direction. Note that “when the occupant P is not moving forward with respect to the vehicle” means “when the occupant P is in a normal seated position”, “when the occupant P is in the normal seating position”, or It may be said that “when the occupant P is in the normal seating position”.
The main bag 31 is provided to protect the chest P1 of the occupant P when deployed. The main bag 31 is a bag that does not protect the head of the occupant P because the upper end of the main bag 31 is located at the same or substantially the same position as the shoulder of the occupant P when deployed. Further, when deployed, the main bag 31 has a lower end above the waist of the occupant P and is at the same position as or substantially the same as the lower end of the chest P1 of the occupant P (abdomen position of the occupant P), and does not protect the lumbar of the occupant P. It is a bag. However, the main bag 31 may be a bag that can protect not only the chest P1 but also the head and / or waist of the occupant P.

The main bag 31 is inflated and deployed only by the gas ejected from the first gas ejection port 21 of the gas generator 20, and the gas ejected from the second gas ejection port 22 of the gas generation device 20 directly flows in. There is no.

As shown by the black arrows in FIGS. 7 and 9, the gas ejected from the first gas ejection port 21 first passes through the first portion 31 a on the vehicle rear side from the arm chamber 32 of the main bag 31. It flows to the front side, and then passes through the second portion 31b that is below the arm chamber 32 of the main bag 31 in the vertical direction, and passes through the third portion 31c that is on the front side of the vehicle from the arm chamber 32 of the main bag 31 from below. Flows upward.
Since the gas ejected from the first gas ejection port 21 flows through the first portion 31a toward the front of the vehicle, the main bag 31 can be deployed forward of the vehicle relatively early.
In addition, since the gas ejected from the first gas ejection port 21 flows from the lower side to the upper side in the third portion 31c, the gas flows from the upper side to the lower side in the third portion 31c. In comparison, when the third portion 31c is expanded and inflated, the upper arm portion P2 of the occupant P can be lifted upward by the third portion 31c. As a result, compared with the case where gas flows through the third portion 31c from the upper side to the lower side, the amount of lap when the occupant P's upper arm portion P2 and the chest portion P1 are viewed from the vehicle left-right direction can be reduced. It can suppress that the upper arm part P2 of P interposes between the chest part P1 and the airbag 30, and increases the bending of the chest part P1.

  As shown in FIG. 1, the arm chamber 32 is in the middle of the main bag 31 in the up-down and front-back direction when viewed from the left-right direction of the vehicle when the airbag 30 is deployed. The arm chamber 32 expands to a side of a part of the upper arm portion P2 of the occupant P when the occupant P does not move forward relative to the vehicle at the time of a side collision. The arm chamber 32 is provided to prevent the upper arm portion P2 from being excessively pushed by the airbag 30 inward in the vehicle width direction. The arm chamber 32 and the main bag 31 are not in communication.

  Only the gas ejected from the second gas ejection port 22 of the gas generation device 20 flows into the arm chamber 32, and the gas ejected from the first gas ejection port 21 of the gas generation device 20 directly flows into the arm chamber 32. There is no.

  The tube 33 is provided to connect the second gas ejection port 22 of the gas generator 20 and the arm chamber 32. The tube 33 is provided to supply (lead) the gas ejected from the second gas ejection port 22 to the arm chamber 32. In order to reduce the material cost, the tube 33 is used to fabricate a single long (elongated flat plate) cloth (tube cloth) 34b from the main bag 31 as shown in FIGS. This is produced by sewing on a cloth (main bag cloth) 34a. However, the tube 33 may be manufactured by sewing a tube manufactured in advance to the main bag cloth 34a. The tube 33 may be provided in a portion of the main bag 31 above the middle portion in the vertical direction of the main bag 31, or may be provided in a portion below the middle portion in the vertical direction. It may be provided in a portion on the outer side in the vehicle width direction from the intermediate portion, or may be provided in a portion on the inner side in the vehicle width direction from the intermediate portion in the vehicle width direction.

As shown by the white arrows in FIGS. 7 and 9, the gas ejected from the second ejection port 22 flows in the tube 33 toward the vehicle front side and flows into the arm chamber 32.
Since the gas ejected from the second gas ejection port 22 flows in the tube 33 toward the vehicle front side, the main bag 31 can be deployed forward of the vehicle.

For example, the airbag 30 is folded as follows.
As shown in FIG. 10, first, the airbag 30 is rolled and folded from the upper end and / or the lower end to the middle in the vertical direction with the airbag 30 flattened, and then the front side to the rear side in order to expedite the vehicle forward. Fold the bellows. However, the folding from the upper end and / or the lower end to the middle in the vertical direction may be a bellows fold instead of a roll fold. Further, the folding from the front side to the rear side may be roll folding instead of bellows folding. The reason why the airbag 30 is folded in the front-rear direction after being folded in the up-down direction is that the airbag 30 is deployed in the front-rear direction (in front of the vehicle) relatively early by utilizing the property of trying to deploy in the reverse order. is there.

The airbag 30 is produced by the following procedures (i) to (iv), for example.
(I) As shown in FIG. 11, first, a single long tube cloth 34b is sewn on a single main bag cloth (base cloth) 34a for producing the main bag 31. To do. At this time, as shown in FIG. 12, the tube cloth 34b is sewn into a tube shape by sewing both ends in the width direction, which is a direction orthogonal to the longitudinal direction, onto the main bag cloth 34a with the thread 35a, as shown in FIG. As shown, the other end in the longitudinal direction is sewn to the main bag cloth 34a with the thread 35b in a state where the one end in the longitudinal direction is opened.
(Ii) Thereafter, the main bag cloth 34a is folded back, and the ends of the main bag cloth 34a are sewn together with a thread 35c. Further, the portion of the main bag cloth 34a where the arm chamber 32 is provided is sewn together with one end in the longitudinal direction of the tube cloth 34b with a thread 35d.
(Iii) Thereafter, the portion surrounded by the thread 35d is cut off to open a hole 36a in the main bag cloth 34a. Further, a hole 36b is opened in the main bag cloth 34a.
(Iv) Thereafter, the holes 36a and 36b are covered with the two connecting cloths 34c and 34d, and the two connecting cloths 34c and 34d are respectively sewn on the main bag cloth 34a with the threads 35e and 35f. Production is complete.

  The side collision sensor 40 is a sensor that detects a side collision of the vehicle. The side collision sensor 40 may be any sensor that can detect a side collision of the vehicle. For example, an acceleration sensor that detects acceleration (G) in the vehicle left-right direction of the vehicle, and a vehicle structure that is not illustrated due to deformation in the vehicle left-right direction. A pressure sensor for detecting a pressure change in the chamber. The output signal of the side collision sensor 40 is input to the control device 60 as shown in FIG.

The front collision sensor 50 is a sensor that is provided, for example, at the center in the left-right direction of the vehicle and detects acceleration (G) in the vehicle front-rear direction of the vehicle. The front collision sensor 50 is a sensor that detects the acceleration of the vehicle in the longitudinal direction of the vehicle not only in a side collision but also in a front collision (front collision).
The output signal of the front collision sensor 50 is input to the control device 60.

  The control device 60 is composed of an ECU. In the control device 60, calculation is executed based on a control routine as shown in FIG. Specifically, it is as follows.

First, at the time of a side collision, in step 101, a signal from the side collision sensor 40 is read.
Next, the process proceeds to step 102 where the side operation value calculated based on the signal from the side collision sensor 40 (when the side collision sensor 40 is an acceleration sensor, the signal from the side collision sensor 40 is time integrated. The calculated side G integral calculation value) is obtained, and it is determined whether or not this side calculation value is larger than a predetermined side threshold value. The side threshold value is a value beyond which it is necessary for the impact of a side impact to deploy the airbag 30.
When the side calculation value is equal to or smaller than the side threshold value, it is determined that the impact of the side collision is not necessary to deploy the airbag 30, and the process proceeds to the end step.
When the side operation value is larger than the side threshold value, the process proceeds to step 103.

In step 103, a signal from the front collision sensor 50 is read.
Next, the routine proceeds to step 104 where the signal from the front collision sensor 40 is time-integrated to obtain a G integral calculation value, and it is determined whether or not this G integral calculation value is larger than a predetermined predetermined longitudinal threshold value. Is done. The front-rear direction threshold value is a value that is predicted to exceed the chest P1 of the occupant P that has moved to the front of the vehicle in the arm chamber 32 because the amount of movement of the occupant P is relatively large beyond that. .

If the G integral calculation value is equal to or smaller than the front-rear direction threshold, it is determined that the occupant P does not move forward or is a relatively small amount even if it moves, and the routine proceeds to step 105.
In step 105, gas for inflating the main bag 31 is ejected from the first gas ejection port 21 of the gas generation device 20, and the arm chamber 22 is expanded from the second gas ejection port 22 of the gas generation device 20. Therefore, the internal pressure when the deployment of the arm chamber 22 is completed is made lower than the internal pressure when the deployment of the main bag 31 is completed. In Step 105, if the internal pressure at the completion of deployment of the arm chamber 22 can be adjusted to be lower than the internal pressure at the completion of deployment of the main bag 31, the second gas jet port 22 of the gas generator 20 can also be used. Gas may be ejected.
The process proceeds from step 105 to the end step.

If the G integral calculation value is larger than the front-rear direction threshold, it is determined that the amount by which the occupant P moves forward is relatively large, and the routine proceeds to step 106.
In step 106, gas is ejected not only from the first gas ejection port 21 of the gas generator 20 but also from the second gas ejection port 22. At this time, the amount of gas ejected from the second gas ejection port 22 is greater than the amount of gas supplied to the arm chamber 22 in step 105 (the amount of gas ejected from the second gas ejection port 22 in step 105). In many cases, the internal pressure when the deployment of the arm chamber 22 is completed is the same as or substantially the same as the internal pressure when the deployment of the main bag 31 is completed.
The process proceeds from step 106 to the end step.

Next, the operation of the embodiment of the present invention will be described.
(A) When the vehicle collides from the 90-degree direction (straight side) with respect to the front of the vehicle, the vehicle longitudinal acceleration generated in the vehicle at the time of a side collision is relatively small, and as shown in FIGS. When there is no movement to the front of the vehicle or relatively little, that is, when the occupant P has not moved to the front of the vehicle to the position where the chest P1 of the occupant P is inward in the vehicle width direction of the arm chamber 32 in a side collision ( When the occupant P is not moving forward to the position where the chest P1 of the occupant P laps with the arm chamber 32 when viewed from the left-right direction of the vehicle during a side collision)

(A1) The control device 60 determines that the calculated value (G integral calculated value) based on the detection result of the front collision sensor 50 is smaller than a predetermined threshold (front-rear direction threshold), and the amount of gas supplied to the arm chamber 32 Is adjusted so that the internal pressure of the arm chamber 32 is lower than the internal pressure of the main bag 31. Further, in the airbag 30 that has been deployed, the main bag 31 is positioned on the side of the chest P1 (the side of the outer end P1 ′ in the vehicle width direction of the chest P1), and the arm chamber 32 is positioned on the side of the upper arm P2. To do.
Therefore, as shown in FIG. 2, it is possible to suppress the upper arm portion P2 from being pushed excessively inward in the vehicle width direction by the arm chamber 32. Moreover, as shown in FIG. 3, the load which restrains the chest part P1 by the main bag 31 can be obtained from the initial stage when the main bag 31 begins to be crushed by the chest part P1.

(A2) When the chest P1 is restrained by the main bag 31 (because the chest P1 is not restrained by the arm chamber 32 or is negligible even if restrained), gas is supplied to the arm chamber 32 ( The protective effect of the chest part P1 by the airbag 30 is shown (in the case indicated by the solid line in FIG. 3) and not supplied (in the case indicated by the dotted line in FIG. 3) (regardless of the amount of gas supplied to the arm chamber 32). Can be obtained equally.

(B) When the vehicle collides obliquely from the front, the vehicle longitudinal acceleration generated in the vehicle at the time of the side collision is relatively large. As shown in FIGS. In the case of a relatively large size, that is, when the occupant P moves forward of the vehicle to a position where the chest P1 of the occupant P is in the vehicle width direction inside position of the arm chamber 32 at the side collision (the chest P1 of the occupant P is When the occupant P moves to the front of the vehicle to the position where it wraps with the arm chamber 32 when viewed from the direction)

(B1) The control device 60 determines that the calculated value (G integral calculated value) based on the detection result of the front collision sensor 50 is greater than a predetermined threshold (front-rear direction threshold), and the amount of gas supplied to the arm chamber 32 Is adjusted to be larger than the amount of gas supplied to the arm chamber 32 when it is determined that the G integral calculation value is smaller than the front-rear direction threshold value. In addition, the arm chamber 32 of the airbag 30 that has been deployed is located on the side of the chest P1 (on the side of the outer end P1 ′ in the vehicle width direction of the chest P1).
Therefore, as shown by the solid line in FIG. 6, a load that restrains the chest P1 by the arm chamber 32 can be obtained from the initial stage when the airbag 30 starts to collapse by the chest P1.

(B2) The dotted line in FIG. 6 shows the case where no gas is supplied to the arm chamber 32. At the initial stage when the airbag 30 starts to collapse by the chest P1, the chest restraint load by the airbag 30 is almost obtained. First, the case where the chest restraint load by the airbag 30 becomes large only after the airbag 30 is crushed by the chest P1 is shown.

From the above (A) and (B), the following effects can be obtained in the embodiment of the present invention.
When the occupant P has not moved forward to the position where the chest P1 is located in the vehicle width direction inside position of the arm chamber 32 at the time of a side collision, that is, the control device 60 calculates a value based on the detection result of the front collision sensor 50. When it is determined whether (G integral calculation value) is larger than a predetermined threshold (front-rear direction threshold) and it is determined that the G integral calculation value is smaller than the front-rear direction threshold, the arm chamber is opened from the second gas ejection port 22. The amount of gas supplied to 32 is set so that the internal pressure of the arm chamber 32 is lower than the internal pressure of the main bag 31. Therefore, when the occupant P does not move forward in the side collision or moves, the upper arm portion P2 of the occupant P is excessively pushed inward in the vehicle width direction by the arm chamber 32. The chest P <b> 1 of the occupant P can be effectively restrained by the main bag portion 31 while suppressing this.
On the other hand, when the occupant P moves to the front of the vehicle until the chest P1 is located at the inner position in the vehicle width direction of the arm chamber 32 in a side collision, that is, the control device 60 calculates the value based on the detection result of the front collision sensor 50. When it is determined whether (G integral calculation value) is larger than a predetermined threshold (front / rear direction threshold) and it is determined that the G integral calculation value is larger than the front / rear direction threshold, the arm chamber is opened from the second gas jet port 22. The amount of gas supplied to the arm chamber 32 when the occupant P has not moved forward to the position where the chest P1 is located at the inner side in the vehicle width direction of the arm chamber 32 in a side collision, That is, the amount is larger than the amount of gas supplied to the arm chamber 32 when it is determined that the G integral calculation value is smaller than the front-rear direction threshold. Therefore, when the amount of movement of the occupant P toward the front of the vehicle in a side collision is relatively large, the chest P1 of the occupant P can be effectively restrained by the arm chamber 32.
Therefore, not only when the occupant P is not moving forward or moving at the time of a side collision, the movement amount is relatively small, but also when the occupant P is moving relatively forward. However, the protection of the chest P1 of the occupant P can be appropriately and effectively performed by the airbag 30.

In the embodiment of the present invention, the following effects can be further obtained.
The tube 33 connecting the second gas jet port 22 of the gas generator 20 and the arm chamber 32 of the airbag 30 is produced by sewing a single tube cloth 34b to the main bag cloth 34a. In order to produce the tube 33, a part of the main bag 31 can be used, which is advantageous in terms of the material cost of the tube 33.

DESCRIPTION OF SYMBOLS 10 Side airbag apparatus 20 for vehicles Gas generator 21 1st gas outlet 22 2nd gas outlet 30 Airbag 31 Main bag 32 Arm chamber 33 Tube 34a Main bag cloth 34b Tube cloth 34c, 34d Connection cloth 40 Side collision sensor 50 Front collision sensor 60 Control device 70 Seat back 71 Seat cushion P Crew P1 Chest P1 'Outer end P2 of the chest in the vehicle width direction Upper arm

Claims (2)

(A) a gas generator comprising a first gas outlet and a second gas outlet;
(B) a main bag provided with a portion that develops to the side of the chest of the occupant when the occupant is not moving forward of the vehicle with respect to the vehicle by the gas ejected from the first gas ejection port; An arm chamber that is deployed to the side of the upper arm portion of the occupant when the occupant is not moving forward of the vehicle with the gas ejected from the gas outlet of the vehicle,
Have
When the occupant is not moving forward of the vehicle with respect to the vehicle until the position where the occupant's chest is positioned inward in the vehicle width direction of the arm chamber at the time of a side collision, the arm chamber is supplied from the second gas ejection port. The amount of gas is set so that the internal pressure of the arm chamber is lower than the internal pressure of the main bag, and the occupant moves forward of the vehicle with respect to the vehicle until the position where the chest of the occupant is inward in the vehicle width direction of the arm chamber in a side collision. When the occupant moves, the amount of gas supplied to the arm chamber from the second gas outlet is set so that the occupant moves the vehicle relative to the vehicle until a position where the occupant's chest is positioned inward in the vehicle width direction of the arm chamber at the time of side collision. A vehicle side airbag device configured to have an amount larger than the amount of gas supplied from the second gas ejection port to the arm chamber when not moving forward. The airbag further includes a tube connecting the second gas ejection port and the arm chamber,
The vehicle side airbag device according to claim 1, wherein the tube is produced by sewing a single tube cloth to a main bag cloth for producing the main bag.

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