JP2019064573A - Air bag device - Google Patents

Abstract

To suppress inflation gas from leaking to the outside of an air bag.SOLUTION: A gas generator 20 in an air bag device comprises a generator main body 21 having a gas blow-out part 23 at one end part thereof and comprises a first mounting protrusion 24 and a second mounting protrusion 25 protruding from an outer surface of the generator main body 21. An air bag 30 in the air bag device has a bag main body 31 which is expanded and inflated by inflation gas to be supplied from the gas blow-out part 23. The gas generator 20 and the air bag 30 are mounted on a side frame part 15, in the first mounting protrusion 24 and the second mounting protrusion 25. The bag main body 31 is provided with an insertion port 36 which has a size in which the gas blow-out part 23 can pass through the port and the gas generator 20 cannot pass through locations where the first mounting protrusion 24 and the second mounting protrusion 25 are formed. The gas blow-out part 23 is arranged inside the bag main body 31 through the insertion port 36, and the first mounting protrusion 24 and the second mounting protrusion 25 are arranged outside the bag main body 31.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an air bag apparatus which protects an occupant from an impact by expanding and expanding an air bag at a position approaching an occupant seated on a vehicle seat when an impact is applied to the vehicle due to a collision or the like.

An air bag apparatus provided with a gas generator and an air bag is effective as a device for protecting an occupant from an impact when an impact is applied to the vehicle due to a collision or the like.
For example, in an air bag device described in Patent Document 1, a generator that extends along an axis as a gas generator and has a gas injection portion at one end and a harness connected to the other end One has been used which comprises a body and a pair of bolts projecting from the outer surface surrounding the axis in the generator body. Further, as an air bag, the air bag is provided with a bag main body which is expanded and expanded by an expansion gas jetted from a gas jet portion and in which a slit for inserting a gas generator is formed, and a cover cloth which covers the slit. It is used.

  In the above-mentioned air bag device, when assembling the gas generator to the air bag, most of the gas generator including both bolts is inserted into the bag body through the slit, with the gas jet part at the top. A pair of bolts projecting from the generator body within the bag body are inserted through the bag body. Both bolts are attached to the vehicle body together with the bag body at a portion exposed to the outside of the bag body by insertion.

  The harness and the harness-side end of the generator body are disposed outside the bag body. These harnesses, exposed parts of the generator body and the slits are covered by a cover cloth. When the bolt is inserted into the locking hole formed in the cover cloth, the cover cloth is locked to the bolt.

Unexamined-Japanese-Patent No. 2017-81248

  However, as mentioned above, the gas generator comprises a bolt which projects from the outer surface of the generator body. In order to insert the bolt into the bag body, the length of the slit is set not only for the gas outlet to pass but also for the gas generator to pass at the location where the bolt is provided. As a result, the length of the slit is increased by the amount of the bolt, and a gap is generated between the generator body and the slit, which can be a leakage path for the expansion gas. Also, the cover cloth covering the slit is only locked to the bolt away from the slit. Therefore, the inflation gas in the bag body leaks from the gap between the generator body and the slit, and then leaks to the outside of the airbag through the gap between the cover cloth and the bag body.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an air bag apparatus capable of suppressing the leakage of inflation gas to the outside of the air bag.

  An air bag device that solves the above problems includes a generator body that extends along an axis and has a gas jet at one end, and a mounting protrusion that protrudes from an outer surface surrounding the axis in the generator body. And an air bag having a bag body expanded and inflated by the inflation gas supplied from the gas jet portion, the air being attached to the vehicle by the gas generator and the air bag at the attachment projection. In the bag device, the bag main body is provided with an insertion port having a size through which the gas injection portion passes and the gas generator does not pass at a location where the attachment protrusion is provided, and the gas injection portion Is disposed inside the bag body through the insertion opening, and the attachment protrusion is disposed outside the bag body.

  The gas generator and the air bag in the air bag apparatus having the above configuration are attached to the vehicle at the attachment protrusions of the same gas generator. At the time of this attachment, the gas injection part at one end of the generator body in the gas generator is inserted into the insertion port of the bag body in the air bag and disposed inside the bag body through the insertion port. The mounting projections are disposed outside the bag body. Therefore, it is sufficient for the insertion opening to have a size through which the gas ejection portion passes, so that the mounting protrusion need not be inserted into the bag body, and the size through which the gas generator passes You do not need to have it. In this respect, according to the above configuration, the insertion port has a size through which the gas injection portion passes and the gas generator does not pass at the location where the attachment protrusion is provided. Therefore, the clearance between the peripheral portion of the insertion opening and the gas generator is smaller than that in the case where the mounting protrusion is also disposed inside the bag body through the insertion opening.

  When an impact is applied to the vehicle on which the air bag device is mounted due to a collision or the like, inflation gas is ejected from the gas ejection portion. The inflation gas is supplied to the bag body, which deploys and inflates to protect the occupants of the vehicle from impact. At this time, since the gap between the peripheral portion of the insertion port and the gas generator is small, the expansion gas jetted from the gas jet portion hardly passes through the clearance.

  In the above-mentioned airbag device, a belt having one end as a base end and the other end as a tip is disposed outside the bag body, and the base end of the belt is the bag body. Preferably, the tip end portion is engaged with the gas generator at a position separated from the gas injection portion.

  According to the above configuration, the distal end portion of the belt, which is disposed outside the bag body and joined to the bag body at the proximal end portion, is locked to a portion of the gas generator separated from the gas ejection portion Thus, the air bag is connected to the gas generator via the belt.

In the above-mentioned air bag device, in the belt, an intermediate portion between the proximal end and the distal end is preferably disposed at a position covering the insertion port.
According to the above configuration, the insertion port is covered by the intermediate portion of the belt coupled to the bag body at the proximal end and locked to the gas generator at the distal end. The insertion port is closed by the middle portion of the belt. Even if the inflation gas passes through the gap between the peripheral portion of the insertion port and the gas generator, it can not leak outside the airbag unless it passes through the gap between the insertion port and the belt. Therefore, leakage of the inflation gas to the outside of the air bag is further suppressed as compared with the case where the insertion opening is not covered by the middle portion of the belt.

In the above air bag device, the belt preferably extends along the axis.
According to the above configuration, the air bag is connected to the gas generator via the belt by the belt disposed at the tip end portion being engaged with the gas generator at the tip end portion, in a manner extending along the axis of the generator body. It will be In addition, movement of the generator body relative to the bag body in the direction along the axis of the generator body, that is, in the direction in which the gas injection portion is pulled out of the insertion port, is restricted.

  In the above air bag device, the attachment protrusions are provided at two places in a direction along the axis, and of the two attachment protrusions, one close to the gas ejection portion is constituted by a first attachment protrusion, What is far from the gas ejection part is constituted by the second attachment projection, and the belt is hooked to the first attachment projection at a location adjacent to the base end, and at the tip end to the second attachment projection It is preferable to be locked.

  According to the above configuration, in the state where the gas generator and the air bag are attached to the vehicle at the attachment projection, the gas injection portion is disposed inside the bag body through the insertion port. Both the first mounting projection close to the gas outlet and the second mounting projection remote from the gas outlet are arranged outside the bag body. The belt is hooked to the first mounting projection at a location adjacent to the proximal end and locked to the second mounting projection at the distal end. Therefore, the belt coupled to the bag body at the proximal end is connected to the gas generator at two points separated from each other along the axis.

  In the air bag device, the belt is configured to be bendable with the proximal end coupled to the bag body as a fulcrum, and the belt extends from the proximal end toward the distal end. And an elongated hole is formed through which the first attachment protrusion is inserted, and the elongated hole overlaps the insertion opening at a location where the base end of the belt is joined to the bag body; The first mounting protrusion is engaged with the portion where the gas injection portion is inserted into the insertion hole at a portion where the insertion portion overlaps the first insertion protrusion by being engaged with the first mounting protrusion. It is preferable that the positioning part which performs positioning of is formed.

  According to the above configuration, when assembling the gas generator to the air bag, the belt is bent with the base end portion coupled to the bag body as the fulcrum. By this bending, in the belt, a portion on the tip side of the base end portion is separated from the bag body. A gas generator is inserted into the insertion port at the gas outlet. With this insertion, the first attachment protrusion moves toward the insertion port. When the first mounting protrusion is engaged with the positioning portion of the elongated hole, the first mounting protrusion is positioned relative to the bag body. Furthermore, the belt is folded back toward the second attachment protrusion with the proximal end coupled to the bag body as a fulcrum. At this time, since the first mounting protrusion is inserted into the elongated hole, interference between the belt and the first mounting protrusion is avoided. Then, when the bent-back portion of the belt approaches the second mounting protrusion and is locked to the second mounting protrusion at the tip end, the belt is separated from each other along the axis with respect to the gas generator 2 It will be in the state where it was connected in the place.

  In the above-mentioned air bag device, a locking hole is formed in the tip end portion of the belt, and the second mounting protrusion of the gas generator in a state in which the first mounting protrusion is engaged with the positioning portion is Preferably, the belt is engaged with the second attachment projection by being inserted into the engagement hole.

  According to the above configuration, the belt is bent back to approach the second attachment protrusion in a state of being positioned with respect to the bag body by the first attachment protrusion being engaged with the positioning portion of the elongated hole. When the belt is engaged with the second attachment projection at the engagement hole at the tip end by the second attachment projection being inserted into the engagement hole at the tip end of the belt, the belt is against the gas generator, It is connected at two points separated from each other along the axis. The belt is held in tension between the first and second mounting protrusions. When the second mounting protrusion is pulled out of the locking hole, the locked state of the belt with respect to the second mounting protrusion is released.

  In the above-mentioned air bag device, the generator main body has a cylindrical shape, and an auxiliary belt wound around the generator main body is disposed outside the bag main body, and one end of the auxiliary belt is the bag Preferably, the other end is coupled to the main body, and is anchored in the gas generator at a position spaced apart from the one end of the auxiliary belt in the circumferential direction of the generator body.

  According to the above configuration, the auxiliary belt disposed outside the bag body and coupled to the bag body at one end is wound around the generator body. The other end of the auxiliary belt is engaged with the gas generator at a position spaced apart from the one end of the auxiliary belt in the circumferential direction of the generator main body, whereby the air bag is inserted via the auxiliary belt. It will be in the state connected with the gas generator. Therefore, when the bag body is expanded and expanded by the inflation gas jetted from the gas jet portion, the bag body is made to swing by the auxiliary belt even if it tries to swing with the insertion port into which the gas jet portion is inserted. Swing is restricted.

  In the above-mentioned air bag device, as the auxiliary belt, a pair of auxiliary belts which are connected to the bag body in a state in which one ends are adjacent to each other are used, and each auxiliary belt corresponds to the generator body Preferably, they are wound in opposite directions in the circumferential direction and are locked to the gas generator at the other end.

  According to the above configuration, the pair of auxiliary belts coupled to the bag body with one ends adjacent to each other are wound around the generator body in mutually opposite directions in the circumferential direction, At the end it is locked to the gas generator. Due to the above-mentioned locking of both auxiliary belts, the air bag is connected to the gas generator via the pair of auxiliary belts. Moreover, the two auxiliary belts are wound around the generator body in opposite directions. Therefore, the swing of the bag body at the time of deployment and expansion is more effectively restricted as compared with the case of one auxiliary belt.

  In the air bag device, a locking hole is formed at the other end of the auxiliary belt, and the auxiliary belt is engaged with the mounting protrusion by inserting the mounting protrusion into the locking hole. It is preferable that it is stopped.

  According to the above configuration, the auxiliary belt disposed outside the bag body and coupled to the bag body at one end is wound around the generator body. The mounting protrusion is inserted into the locking hole at the other end of the auxiliary belt, so that the other end of the auxiliary belt is separated from the one end of the auxiliary belt in the circumferential direction of the generator body It is locked to the attachment protrusion of When the attachment protrusion is pulled out of the engagement hole, the engagement of the auxiliary belt with the attachment protrusion is released.

  In the airbag apparatus, a cover cloth covering the insertion port and covering at least a portion of the generator main body provided with the attachment protrusion is disposed outside the bag main body, and is coupled to the bag main body. The cover fabric is formed with a locking hole, and the gas injection portion is disposed outside the bag body among the gas generators disposed inside the bag body through the insertion port. It is preferable that the attached attachment protrusion be inserted into the locking hole.

  According to the above configuration, when assembling the gas generator to the air bag, the gas injection portion of the gas generator is inserted into the insertion port of the bag body and disposed inside the bag body through the insertion port . At least a portion of the generator body provided with the mounting projection is covered by a cover cloth disposed outside the bag body and coupled to the bag body. The mounting protrusion is inserted into the locking hole of the cover cloth. By this insertion, the mounting protrusion is positioned relative to the bag body via the cover cloth. In this manner, the gas generator is assembled to the air bag with the mounting projections positioned.

  The insertion port into which the gas jet of the gas generator is inserted is covered by the cover cloth from the outside of the bag body. Therefore, even if the inflation gas passes through the gap between the peripheral portion of the insertion opening and the gas generator, it can not leak out of the airbag unless it passes between the bag body and the cover cloth. Therefore, leakage of the inflation gas to the outside of the airbag is further suppressed as compared with the case where the insertion opening is not covered by the cover cloth.

  In the above air bag device, the gas injection portion is inserted into the insertion opening by deforming at least a peripheral portion of the insertion opening of the bag main body away from the cover cloth to the inside of the bag main body. Preferably, the apparatus further comprises an assisting insertion aid.

  According to the above configuration, at least the peripheral portion of the insertion opening of the bag body is deformed by the insertion aid to move away from the cover cloth toward the inside of the bag body. By this deformation, the insertion port is inclined with respect to the axis of the gas generator. Therefore, by inserting the gas generator between the bag body and the cover cloth, it becomes possible to smoothly insert the gas injection portion into the insertion port.

  In the air bag device, the insertion assisting tool includes a cylindrical portion and a plate-like portion, and is disposed inside the bag body, and the cylindrical portion is disposed at a location adjacent to the insertion opening. The plate-like portion covers at least the gas ejection portion of the generator body, and the plate-like portion extends from the peripheral portion of the cylindrical portion away from the cover cloth in the radial direction of the cylindrical portion to the axis. It is preferable that, in the direction along the direction, the gas jet portion extends to the opposite side across the insertion port and is held by the bag body.

  When the insertion assisting tool having the above configuration is disposed inside the bag body, the tubular portion is adjacent to the insertion opening. The plate-like portion extends from the cylindrical portion in the direction along the axis of the generator main body to the opposite side of the gas injection portion with the insertion port interposed therebetween, and is held by the bag main body.

  The plate-like portion extends from the peripheral portion of the tubular portion on the side away from the cover cloth in the radial direction of the tubular portion. Therefore, at least the peripheral portion of the insertion port in the bag body is deformed by the cylindrical portion and the plate portion so as to move away from the cover cloth to the inside of the bag body.

  The cylindrical portion covers at least the gas ejection portion of the gas generator. Therefore, when the inflation gas is ejected from the gas ejection portion, the tubular portion receives the inflation gas, and regulates that the inflation gas directly contacts the bag body. This restriction suppresses the bag body from being affected by the heat of the inflation gas.

  In the above-mentioned airbag device, an inner cloth is disposed inside the bag main body and coupled to the bag main body, and a state in which the inner cloth communicates with the insertion opening at a location facing the insertion opening in the inner cloth Preferably, the insertion port is formed, and the plate-like portion of the insertion assisting tool is held by the bag body by being disposed between the bag body and the inner cloth.

  According to the above configuration, the plate-like portion is held by the bag body by being sandwiched by the bag body and the inner cloth. Therefore, it is not necessary to provide a special structure in order to hold the plate-like portion in the bag body. Further, the plate-like portion is disposed between the bag body and the inner cloth and held by the bag body only by performing a simple operation of inserting the plate-like portion between the bag body and the inner cloth.

  When assembling the gas generator to the air bag, the gas injection part of the gas generator is inserted into the insertion opening of the inner cloth following the insertion opening of the bag body, and the bag through the insertion opening and the insertion opening Located inside the body.

In the above-mentioned air bag device, it is preferable that the insertion port is formed longer than the insertion port in the side of the insertion assisting tool away from the cylindrical portion.
According to the above configuration, the plate-like portion of the insertion assisting tool is inserted between the bag body and the inner cloth from between the peripheral portion of the insertion opening in the bag body and the peripheral portion of the insertion opening in the inner cloth Ru.

  If the insertion opening is formed longer than the insertion opening, as in the above configuration, the bag main body is formed outside the portion longer than the insertion opening of the insertion opening. A portion of the peripheral portion of the insertion slot is located. This portion functions as a mark when inserting the plate-like portion between the bag body and the inner cloth. By this mark, it is possible to easily identify where in the peripheral portion of the insertion opening in the bag body and the peripheral portion of the insertion opening in the inner cloth, the place where the plate-like portion is inserted between the bag body and the inner cloth. Then, the plate-like portion is brought into contact with the portion serving as the mark, and is slid to the side away from the cylindrical portion, whereby the plate-like portion is guided between the bag body and the inner cloth.

  In the above-mentioned airbag device, a part of the connecting portion for connecting the inner cloth to the bag main body is provided at a position where the plate-like portion is sandwiched from both sides in the width direction of the plate-like portion It is preferable that the pair of guide coupling portions extend in the longitudinal direction and guide the insertion of the plate-like portion between the bag body and the inner cloth.

  According to the above configuration, the two guide coupling portions exert the function of coupling the inner cloth to the bag body. Besides, the two guide coupling portions also function to guide the insertion of the plate-like portion between the bag body and the inner cloth. Therefore, if the plate-like portion is inserted between the bag body and the inner cloth and in the region sandwiched by the two guide coupling portions, the insertion opening can be inserted from the cylindrical portion in the direction along the axis. It is held in the bag body in a posture extending to the opposite side to the gas jet part. In the held state, the plate-like portion is restricted in the movement in the width direction by the two guide coupling portions.

  In the above-described airbag device, the insertion assisting tool is provided at an end of the plate-like portion opposite to the cylindrical portion, and includes a restricting portion exposed from between the bag body and the inner cloth. It is preferable that the restricting portion restricts the movement of the plate-like portion toward the cylindrical portion by contacting the end edge of the inner cloth.

  According to the above configuration, in the insertion assisting tool, the plate-like portion is disposed between the bag body and the inner cloth, whereas the restricting portion is exposed from between the bag body and the inner cloth. The restricting portion restricts the movement of the plate-like portion toward the cylindrical portion by abutting on the end edge of the inner cloth. Therefore, it is regulated by the regulation part that the plate-like part falls out between the bag body and the inner cloth.

  In the above air bag device, the air bag deploys and inflates between the side wall portion and the vehicle seat when an impact is applied to the side wall portion of the vehicle from the side, and the air bag device is used for the vehicle. It is preferable to protect the occupant seated on the seat from impact.

  The gap between the side wall of the vehicle and the occupant seated in the vehicle seat is narrow. Moreover, when an impact is applied to the side wall portion from the side due to a collision or the like, the side wall portion is deformed to the indoor side, so the gap between the side wall portion and the occupant becomes narrower. In order to deploy and inflate the airbag with such a narrow gap, it is necessary to deploy and inflate the airbag in a short time. To that end, it is important to reduce the amount of inflation gas leaking out of the air bag. In this respect, as described above, when the gap between the peripheral portion of the insertion opening and the gas generator is reduced by arranging the mounting protrusion outside the bag body, the amount of leakage of the inflation gas to the outside of the airbag is small. Become. Therefore, even if the gap between the side wall portion and the occupant is narrow, it is possible to deploy and inflate the air bag in a short time and appropriately protect the occupant from the impact.

  According to the above-described airbag device, leakage of the inflation gas to the outside of the airbag can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment embodied in the side airbag apparatus for vehicles, and is a side view which shows the vehicle seat provided with the same apparatus with a passenger | crew. FIG. 2 is a partial plan view showing the positional relationship between a vehicle seat, an airbag, an occupant, and a side wall in the first embodiment. FIG. 3 is a partial cross-sectional view of the positional relationship between a vehicle seat, an airbag, an occupant, and a side wall in the first embodiment, as viewed from the front of the vehicle. The side view which looked at the air bag module in a 1st embodiment from the car inner side. FIG. 5 is a partial cross-sectional view showing a state before the air bag module is attached to the side frame portion in the first embodiment. FIG. 5 is a partial plan cross-sectional view showing the air bag module attached to the side frame portion in the first embodiment. FIG. 7 is a view showing a state before the auxiliary belt is locked to the second attachment protrusion in the first embodiment, and is a partial cross-sectional view along line 7-7 in FIG. 10; FIG. 7 is a partial side view showing the state before the gas generator is assembled to the air bag in the first embodiment. The partial side view which shows the state in the middle of assembling | attaching a gas generator to an airbag in 1st Embodiment. The partial side view which shows the state in the middle of assembling | attaching a gas generator to an airbag in 1st Embodiment. The partial side view which shows the state in which the gas generator was assembled | attached to the airbag in 1st Embodiment. The partial side view which looked at an insertion port and its peripheral part from the inner side (back side of FIG. 9) of a bag main body in 1st Embodiment. The partial side view which looked at the relationship between the insertion port of a bag main body, and the gas generator by which the gas ejection part was inserted in the insertion port in 1st Embodiment from the inner side (back side of FIG. 10) of a bag main body. (A) is a fragmentary sectional view along a 14a-14a line in FIG. 8, (b) is a fragmentary sectional view which expands and shows a part of Fig.14 (a). (A) is a partial cross-sectional view showing a state in which the belt in the airbag of FIG. 14 (a) is bent when the gas generator is assembled to the airbag, and (b) is a cross-sectional view of FIG. The fragmentary sectional view which expands and shows a part. The fragmentary sectional view which shows the state in front of the gas injection part being inserted in the insertion port of the bag main body of FIG. 15 (a), (b). FIG. 17 is a partial cross-sectional view showing a state immediately before the gas injection portion is inserted into the insertion port of the bag body of FIG. 16 and the belt is bent back. It is a figure which shows 2nd Embodiment embodied in the side airbag apparatus for vehicles, and is a partial side view which shows the state in which the gas generator was assembled | attached to the airbag. The partial rear view which shows the state in which the gas generator was assembled | attached to the airbag in 2nd Embodiment. In 2nd Embodiment, the fragmentary sectional view which shows the state before an air bag module is attached to a side frame part. The partial side view which looked at the inner cloth and the insertion aid in the 2nd embodiment from the inner side (back side of FIG. 18) of the bag body. The perspective view of the insertion aid in 2nd Embodiment. The disassembled perspective view of a part of bag body in 2nd Embodiment, a cover cloth, and an inner cloth. FIG. 13 is a partial side view showing the state before the insertion assisting tool is attached to the bag body and the inner cloth in the second embodiment. In 2nd Embodiment, the partial side view which shows the state before a gas generator is assembled | attached between a bag main body and a cover cloth. (A) is a figure corresponding to FIG. 16, and is a fragmentary sectional view which shows the state before a gas ejection part is inserted in the insertion port of a bag main body, (b) is a peripheral part of an insertion port among bag bodies. FIG. 10 is a partial plan cross-sectional view showing a state of being deformed so as to move away from the cover cloth to the inner side of the bag body.

First Embodiment
Hereinafter, a first embodiment embodied in a side airbag device for a vehicle will be described with reference to FIGS.

  In the following description, the forward direction of the vehicle will be described as the front, and the reverse direction of the vehicle will be described as the rear. Further, with the central portion in the width direction (vehicle width direction) of the vehicle as a reference, the side closer to the central portion is the inner side, and the side away from the central portion is the outer side. Further, it is assumed that an occupant having the same physical constitution as the dummy for the collision test is seated on the vehicle seat in a predetermined regular posture.

  As shown in FIGS. 1 to 3, a vehicle seat 12 as a vehicle seat constituting a front seat is disposed in the vicinity of the inside of the side wall portion 11 in a vehicle 10 as a vehicle. Here, the side wall portion 11 refers to a vehicle constituent member disposed on the side of the vehicle 10, and mainly corresponds to a door, a pillar, and the like. The side wall portion 11 corresponding to the front seat is a front door, a center pillar (B-pillar) or the like.

  The vehicle seat 12 includes a seat cushion 13 and a seat back 14. The seat cushion 13 is attached to the floor of the vehicle body so as to be adjustable in the longitudinal direction. The seat back 14 is erected in an inclined state so as to be positioned rearward from the rear of the seat cushion 13 toward the upper side, so that the inclination angle can be adjusted. The vehicle seat 12 is disposed in the vehicle compartment with the seatback 14 facing forward. The width direction of the vehicle seat 12 disposed in this manner coincides with the vehicle width direction.

  In the seat back 14, a seat frame forming the framework is disposed. As shown in FIGS. 5 and 6, a part of the seat frame is constituted by a side frame portion 15 disposed at an outer side portion in the seat back 14.

  A storage portion 16 is provided at a position adjacent to the vehicle exterior with respect to the side frame portion 15 in the seat back 14, and an airbag module ABM that constitutes a main portion of the side airbag device is incorporated therein . The air bag module ABM includes a gas generator 20 and an air bag 30 as main components. Next, each of these components will be described.

<Gas generator 20>
The gas generator 20 comprises a generator body 21 and one or more mounting protrusions for mounting the generator body 21 together with the airbag 30 to the side frame portion 15.

  The generator main body 21 is generally referred to as an inflator, and includes cylindrical gas generating portions 22 and gas ejecting portions 23 extending in the substantially vertical direction along the axis L1. Inside the gas generating unit 22, a gas generating agent (not shown) that generates an expansion gas is accommodated. The gas injection portion 23 has a smaller diameter than the gas generation portion 22, and is provided coaxially with the gas generation portion 22 in a state adjacent to the lower side of the gas generation portion 22. A plurality of gas injection holes (not shown) for injecting expansion gas are provided on the outer peripheral portion of the gas injection part 23. In addition, a harness (not shown) serving as an input wiring of an operation signal to the generator main body 21 is connected to an end (upper end) of the gas generation unit 22 on the opposite side to the gas ejection unit 23.

  The generator body 21 using a gas generating agent as described above is generally called a pyrotype. As the generator main body 21, a type (hybrid type) in which a partition wall of a cylinder filled with high-pressure expansion gas is broken by a explosive or the like and the expansion gas is ejected instead of such a pyrotype is used It may be done.

  At two places on the outer peripheral surface of the gas generation part 22 and separated from the gas ejection part 23 in the direction (upward) along the axis L1 of the generator main body 21, the attachment protrusions are in the direction orthogonal to the axis L1. They are provided projecting in the same direction. The outer peripheral surface of the gas generation part 22 corresponds to the outer surface surrounding the axis L1 in the gas generation part 22. Each mounting protrusion is constituted by a bolt in the first embodiment. In order to distinguish between the two mounting protrusions, the mounting protrusion closer to the gas ejection portion 23 is referred to as a first mounting protrusion 24, and the mounting protrusion farther from the gas ejection portion 23 is referred to as a second mounting protrusion 25. As the 1st attachment projection 24 and the 2nd attachment projection 25, what has the same length mutually may be used, and what has different length may be used.

<Airbag 30>
FIG. 4 shows the airbag module ABM in a state (hereinafter referred to as “deployment non-inflation state”) in which the airbag 30 is expanded in a flat state without being filled with an inflation gas, as viewed from the inside of the vehicle There is.

  As shown in FIGS. 1 to 4, the airbag 30 is provided with a bag body 31 that is deployed and inflated by the inflation gas supplied from the gas jet portion 23. The bag body 31 is formed by folding one piece of cloth (also called base cloth, panel cloth, etc.) in half along a folding line 32 set at the center in the width direction and overlapping them in the vehicle width direction. It is formed by combining the two parts. Here, in order to distinguish the two overlapped portions of the bag main body 31, the one located on the vehicle inner side is referred to as the main body cloth 33, and the one located on the vehicle outer side is referred to as the main body cloth 34. The thickness direction and the vehicle width direction of the main body cloth portions 33 and 34 overlapped with each other coincide with each other.

  As the bag body 31, a material having high strength and flexibility and being easily foldable, for example, a woven fabric formed using polyester yarn, polyamide yarn or the like is suitable.

  The above-mentioned connection of the two main body cloths 33, 34 is made at the peripheral joint 35 provided at their peripheral edge. In the first embodiment, the peripheral edge joint portion 35 sews (sews with a sewing thread) a portion of the peripheral edge portions of both the main body cloth portions 33 and 34 excluding the rear end portion (portion near the folding line 32) and the like. It is formed. As described above, the point at which the connection is sewn is the same for the connection portions 44 and 53 described later. Moreover, this point is the same for the side edge joint portion 72, the edge joint portion 73, the peripheral edge joint portion 83, and the guide joint portion 84 in the second embodiment.

  As for the above-mentioned sewing, in FIG. 4, FIG. 8 to FIG. 13, FIG. 18, FIG. 19, FIG. 21, FIG. 23 to FIG. 25 and FIG. The first line type is a line (a kind of broken line) in which a thick line of a fixed length is intermittently arranged side by side, and this shows the sutured portion as seen from the vehicle outer side or the vehicle inner side (see FIG. 4) and the like. The second line type is a line in which thin lines of a fixed length (longer than a general broken line) are intermittently arranged and expressed, which is, for example, located at the back of a piece of cloth and directly visible. It shows the state of no (hidden) sewing thread (see the connecting portion 53 etc. in FIG. 13).

  In addition, the peripheral edge coupling portion 35 may be formed by means different from the above-described sewing using the suture, for example, adhesion using an adhesive. The same applies to the joints 44 and 53, the side edge joint 72, the edge joint 73, the peripheral joint 83, and the guide joint 84.

  Further, in the inside of the bag body 31, there are provided, as a part of the components of the airbag 30, a section for dividing the inside into a plurality of rooms (expansion chambers), a member for straightening the gas for expansion, and the like. .

  As shown in FIG. 5, FIG. 12 and FIG. 13, the gas ejection portion 23 of the gas generator 20 passes through the rear upper end portion of the main body cloth portion 33 inside the car, and the first attachment protrusion 24 and the second attachment At the location where the protrusion 25 is provided, an insertion port 36 having a size that the gas generator 20 does not pass is opened. In the first embodiment, the insertion opening 36 is formed to have a size close to or the minimum at which the gas generator 22 can pass.

  The lower end portion of the gas generator 20 than the first attachment protrusion 24, that is, the whole of the gas injection portion 23 and a part of the gas generation portion 22, more precisely, the first attachment protrusion 24 in the gas generation portion 22. A portion closer to the gas injection portion 23 is disposed inside the bag body 31 through the insertion port 36. The portion of the gas generator 20 closer to the harness than the first attachment protrusion 24 is disposed outside the bag body 31. The corresponding portion of the gas generator 20 includes a first mounting protrusion 24 and a second mounting protrusion 25. Unlike the Patent Document 1, the first attachment protrusion 24 and the second attachment protrusion 25 are not inserted into the bag body 31.

  As shown in FIGS. 8, 9 and 14 (a) and 14 (b), one belt 41 and a pair of belts 41 are provided outside the bag body 31, more precisely on the inside of the body cloth portion 33 inside the car. The auxiliary belt 51 is disposed. The belt 41 and the two auxiliary belts 51 are formed using two pieces of cloth 38 and 37 made of the same material as the bag body 31.

  Both auxiliary belts 51 are constituted by a part of one cloth piece 37. In the cloth piece 37, an insertion hole 39 having the same shape as that of the insertion opening 36 is formed at a position overlapping the insertion opening 36 of the bag body 31.

  The two auxiliary belts 51 are disposed outside the bag body 31. One end portions 52 of the two auxiliary belts 51 are adjacent to each other. Since the two auxiliary belts 51 are constituted by a part of the cloth 37, the two auxiliary belts 51 are connected at the end 52. One end 52 of each auxiliary belt 51 is coupled to the bag body 31 by a coupling portion 53.

  As shown in FIGS. 5, 10 and 11, the respective auxiliary belts 51 are wound around the generator body 21 in opposite directions. The other end 54 of each of the auxiliary belts 51 is locked to a portion of the gas generator 20 that is separated from one end 52 of the auxiliary belt 51 in the circumferential direction of the generator main body 21. More specifically, the other end 54 of each auxiliary belt 51 is formed with a locking hole 55. The auxiliary belts 51 are engaged with the second attachment protrusions 25 by inserting the second attachment protrusions 25 into the engagement holes 55.

  As shown in FIGS. 8 and 14 (a) and (b), the belt 41 is composed of a part of the cloth piece 37 and the whole cloth piece 38. A part of the cloth piece 37 and the whole cloth piece 38 are overlapped with each other. The belt 41 has one end (lower side in FIG. 8) as a proximal end 42 and the other end (upper side in FIG. 8) as a distal end 43. The base end portion 42 is coupled to the bag body 31 together with the auxiliary belt 51 by the coupling portion 44.

  The belt 41 is arranged to extend along the axis L1 of the generator body 21. In the belt 41, a region between the base end portion 42 and the tip end portion 43 (hereinafter, referred to as "intermediate portion 45") is disposed at a position covering the insertion port 36.

  As shown in FIGS. 5 and 11, the belt 41 is hooked to the first mounting protrusion 24 at a position adjacent to the proximal end portion 42. More specifically, as shown in FIGS. 8 and 9, the belt 41 is configured to be bendable with the proximal end 42 coupled to the bag body 31 as a fulcrum. The belt 41 is formed with an elongated hole 46 which extends from the proximal end 42 toward the distal end 43 and into which the first attachment protrusion 24 is inserted. The width of the elongated hole 46 is set to the same size as the radial dimension of the first mounting protrusion 24.

  At the location where the proximal end 42 of the belt 41 is joined to the bag body 31, the elongated hole 46 overlaps the insertion opening 36 and the insertion hole 39. The first attachment protrusion 24 is engaged with the location where the long hole 46 overlaps the insertion opening 36 and the insertion hole 39 in a state where the gas injection part 23 is inserted into the insertion opening 36, and the first attachment A positioning portion 47 for positioning the projection 24 is formed.

  The front end portion 43 of the belt 41 is locked at a position apart from the gas jet portion 23 in the gas generator 20. More specifically, a locking hole 48 is formed at the tip 43 of the belt 41. Then, as shown in FIGS. 10 and 11, the second mounting protrusion 25 of the gas generator 20 in a state in which the first mounting protrusion 24 is engaged with the positioning portion 47 is inserted into the locking hole 48, The belt 41 is configured to be locked to the second attachment protrusion 25.

  In the long hole 46, a wide portion 46 a wider than the other places of the same long hole 46 is formed at a position adjacent to the positioning portion 47. The wide portion 46 a is provided to prevent the long hole 46 from interfering with the insertion of the gas injection portion 23 and a part of the gas generation portion 22 into the insertion port 36 and the insertion hole 39. .

  By the way, the air bag module ABM is formed into a compact storage form (not shown) by folding the air bag 30 (see FIG. 4) in the unfolded and uninflated state. This is to make the air bag module ABM suitable for storage with respect to the limited-sized storage portion 16 in the seat back 14. The air bag module ABM in which the air bag 30 is folded is held in the storage mode by holding means such as a binding tape (not shown).

  The air bag module ABM held in the storage mode is disposed in the storage unit 16. As shown in FIGS. 5 and 6, the first mounting protrusion 24 and the second mounting protrusion 25 are respectively inserted from the vehicle outer side into the insertion holes 17 formed in the side frame portion 15. The gas generator 20 is attached to the side frame portion 15 together with the air bag 30 by fastening a nut 18 to each of the first attachment protrusion 24 and the second attachment protrusion 25 from the vehicle inner side.

  The side airbag apparatus includes an impact sensor 61 and a controller 62 shown in FIG. 1 in addition to the above-described airbag module ABM. The impact sensor 61 is an acceleration sensor or the like, and detects an impact applied to the side wall portion 11 of the vehicle 10 from the side. The controller 62 controls the operation of the generator main body 21 based on the detection signal from the impact sensor 61.

  Furthermore, although the vehicle 10 is equipped with a seat belt device for restraining an occupant P1 seated on the vehicle seat 12, the illustration of the seat belt device is omitted in FIGS. .

Next, the operation of the side airbag device of the first embodiment configured as described above will be described.
First, the procedure for assembling the gas generator 20 to the air bag 30 will be described.

  In this assembly, as shown in FIGS. 14A and 14B, the belt 41 disposed outside the bag body 31 takes the base end 42 coupled to the bag body 31 as a fulcrum, as shown in FIG. In the direction indicated by the arrow. By this bending, as shown in FIG. 9 and FIGS. 15A and 15B, in the belt 41, a portion on the tip end side with respect to the base end portion 42 is separated from the bag main body 31. At the point where the base end portion 42 of the belt 41 is coupled to the bag body 31, the positioning portion 47 in the long hole 46 overlaps the insertion port 36.

  In this state, as shown in FIG. 9 and FIG. 16, the portion of the entire gas ejection portion 23 and the gas generation portion 22 closer to the gas ejection portion 23 than the first attachment protrusion 24 (hereinafter referred to as “gas generation portion 22 Is inserted from the outside of the bag body 31 into the insertion hole 39 in the cloth piece 37 (auxiliary belt 51) and the insertion opening 36 in the bag body 31. Along with this insertion, as shown in FIG. 17, the first attachment protrusion 24 moves to the insertion port 36 side. The gas injection part 23 and the part of the gas generation part 22 are disposed inside the bag body 31 through the insertion port 36 and the insertion hole 39. When the first mounting protrusion 24 is engaged with the positioning portion 47 of the elongated hole 46, the first mounting protrusion 24 is positioned relative to the bag body 31. Both the first mounting protrusion 24 close to the gas injection part 23 and the second attachment protrusion 25 far from the gas injection part 23 are disposed outside the bag body 31.

  Therefore, it is not necessary to insert both the first attachment protrusion 24 and the second attachment protrusion 25 into the bag body 31. Therefore, the insertion port 36 only needs to have a size through which the gas injection part 23 and the gas generation part 22 pass, and the gas generator 20 passes through the location where the first attachment protrusion 24 and the second attachment protrusion 25 are provided. It does not have to have a size. In this respect, in the first embodiment, the insertion port 36 is formed in a size through which the gas injection portion 23 passes and the gas generator 20 does not pass at the portion where the first attachment protrusion 24 and the second attachment protrusion 25 are provided. It is done. Therefore, compared with the case where the first attachment protrusion 24 and the second attachment protrusion 25 are also inserted into the insertion port 36 (the patent document 1 corresponds to this), the gap between the peripheral portion of the insertion port 36 and the gas generator 20 is It becomes smaller.

  Furthermore, the belt 41 is folded back toward the second attachment protrusion 25 with the proximal end 42 coupled to the bag body 31 as a fulcrum as shown by the arrows in FIGS. 9 and 17. At this time, since the first attachment protrusions 24 are inserted into the long holes 46, interference between the belt 41 and the first attachment protrusions 24 is avoided. Then, the bent back portion of the belt 41 approaches the second attachment protrusion 25, and as shown in FIGS. 7 and 10, the second attachment protrusion 25 is engaged with the engagement hole 48 of the distal end portion 43 of the belt 41. Is inserted.

  By the insertion, the belt 41 is hooked to the first mounting projection 24 at a location adjacent to the proximal end 42 and is locked to the second mounting projection 25 at the distal end 43. Therefore, the belt 41 coupled to the bag body 31 at the base end portion 42 is connected to the gas generator 20 at two points separated from each other along the axis L1. The air bag 30 is in a state of being connected to the gas generator 20 via the belt 41. The belt 41 is held in tension between the first attachment protrusion 24 and the second attachment protrusion 25. When the second mounting protrusion 25 is extracted from the locking hole 48, the locked state of the belt 41 with respect to the second mounting protrusion 25 is released.

  Further, the insertion port 36 is covered by the intermediate portion 45 of the belt 41 which is coupled to the bag body 31 at the proximal end 42 and is locked to the gas generator 20 at the distal end 43. The insertion opening 36 is closed by the middle portion 45 of the belt 41.

  Furthermore, the movement of the generator body 21 relative to the bag body 31 in the direction along the axis L1 of the generator body 21, that is, the direction in which the gas injection portion 23 slips out of the insertion port 36, is restricted.

  Subsequently, the pair of auxiliary belts 51 disposed outside the bag body 31 and coupled to the bag body 31 with the one end 52 adjacent to each other are shown by arrows in FIGS. 7 and 10. , Wound around the generator body 21 in opposite directions. The second attachment protrusion 25 is inserted into the locking hole 55 at the end 54 of each auxiliary belt 51 so that the end 54 is a portion of the gas generator 20 from the end 52 of the auxiliary belt 51 to the generator main body. It is locked by the 2nd attachment protrusion 25 of the location spaced apart to the circumferential direction of 21. As shown in FIG. When the second mounting protrusions 25 are extracted from the locking holes 55, the locking state of the respective auxiliary belts 51 with respect to the second mounting protrusions 25 is released.

Next, the operation of the side airbag device of the first embodiment will be described.
In FIG. 1 and FIG. 2, when it is not detected by the impact sensor 61 that an impact is applied to the side wall 11 from the side, an operation signal for operating the generator main body 21 is outputted from the control device 62. The expansion gas is not ejected from the gas ejection unit 23. The air bag 30 continues to be stored in the storage portion 16 together with the gas generator 20 in a storage mode (see FIGS. 5 and 6).

  On the other hand, when the vehicle 10 is traveling or the like, an impact equal to or greater than a predetermined value is applied to the side wall portion 11 from the side or the like due to a side collision or the like. An actuation signal is output from the controller 62 to the generator body 21. In response to the actuation signal, the generator body 21 ejects the expansion gas from the gas injection part 23.

  The inflation gas is supplied to the bag body 31. Under the present circumstances, since the clearance gap between each peripheral part of the insertion port 36 and the insertion hole 39, and the gas generator 20 is made small, the gas for expansion ejected from the gas injection part 23 in FIG. Hard to leak out of 30

  Further, as described above, the insertion port 36 and the insertion hole 39 are closed by the intermediate portion 45 of the belt 41. Therefore, even if the inflation gas passes through the gaps between the gas generator 20 and the peripheral edges of the insertion slot 36 and the insertion hole 39, it must pass through the gaps between the insertion slot 36 and the insertion hole 39 and the belt 41. It can not leak out of the airbag 30. Therefore, leakage of the inflation gas to the outside of the air bag 30 is further suppressed as compared with the case where the insertion opening 36 and the insertion hole 39 are not covered by the intermediate portion 45 of the belt 41.

  The bag body 31 starts to be inflated by the inflation gas supplied as described above. The airbag 30 jumps forward from the seat back 14 with a portion (rear portion) of the airbag 30 left in the storage portion 16.

  The air bag 30 to which the inflation gas is supplied also thereafter is between the side wall portion 11 and the upper body of the occupant P1 seated on the vehicle seat 12, as shown by the two-dot chain line in FIGS. Expand while disengaging (folding) the folded state forward. Also at this time, a small amount of inflation gas leaks to the outside of the bag body 31 from the gap between the gas generator 20 and the peripheral edge portions of the insertion port 36 and the insertion hole 39.

  The air bag 30 thus deployed and inflated intervenes between the upper body of the occupant P1 and the side wall 11 entering the vehicle interior. The upper body is pressed inward by the air bag 30 and restrained. And the impact from the side transmitted to the upper body through the side wall part 11 is relieved by the airbag 30, and the same upper body is protected.

  In the first embodiment, as shown in FIGS. 5 and 11, the air bag 30 is connected to the gas generator 20 via the auxiliary belt 51. Therefore, when the bag body 31 is expanded and expanded by the inflation gas jetted from the gas jet portion 23, the bag body 31 swings with the insertion port 36 into which the gas jet portion 23 is inserted as a fulcrum. The belt is regulated by the auxiliary belt 51.

  In particular, in the first embodiment, a pair of auxiliary belts 51 is used. The two auxiliary belts 51 are wound around the generator body 21 in opposite directions in the circumferential direction, and are locked to the gas generator 20 at the end 54. Therefore, compared with the case where one auxiliary belt 51 is provided, it is possible to more effectively regulate the swinging of the bag body 31 at the time of deployment and expansion.

  Here, as shown in FIG. 2 and FIG. 3, the gap between the side wall 11 of the vehicle 10 and the occupant P1 seated on the vehicle seat 12 is narrow. In addition, when an impact is applied to the side wall portion 11 from the side due to a collision or the like, the side wall portion 11 is deformed to the vehicle interior side, and the gap between the side wall portion 11 and the occupant P1 becomes narrower. In order to deploy and inflate the airbag 30 in such a narrow gap, it is necessary to deploy and inflate the airbag 30 in a short time. To that end, it is important to reduce the amount of inflation gas leaking out of the air bag 30.

  In this respect, in the first embodiment, as described above, by arranging the first attachment protrusion 24 and the second attachment protrusion 25 outside the bag main body 31, the respective peripheral portions of the insertion port 36 and the insertion hole 39 and the gas are provided. The gap with the generator 20 is reduced, and the amount of leakage of the inflation gas to the outside of the air bag 30 is reduced. Therefore, even if the gap between the side wall portion 11 and the occupant P1 is narrow, the airbag 30 can be deployed and inflated in a short time, and the occupant P1 can be appropriately protected from an impact.

According to the first embodiment, the following effects can be obtained in addition to the above.
In the Patent Document 1, the lock hole is formed in the bag body, and a pair of bolts projecting from the generator body disposed inside the bag body are inserted into the lock hole. Therefore, not a small gap is generated between the peripheral edge of the locking hole and the bolt. The expansion gas may also leak from this gap.

  In this regard, in the first embodiment, the locking holes for inserting the first attachment protrusions 24 and the second attachment protrusions 25 into the bag body 31 are not formed. Therefore, the phenomenon that the inflation gas leaks from the gap between the peripheral edge portion of the locking hole and the first attachment protrusion 24 and the second attachment protrusion 25 does not occur. This point is advantageous in suppressing the leakage of the inflation gas to the outside of the airbag 30.

Second Embodiment
Next, a second embodiment embodied in a side airbag device for a vehicle will be described with reference to FIGS.

The second embodiment is different from the first embodiment in the mounting structure of the gas generator 20 to the air bag 30.
As shown in FIG. 20, as the gas generator 20, as in the first embodiment, the one having the generator main body 21 having the gas ejection part 23, and the first attachment projection 24 and the second attachment projection 25 is used. It is done. In addition, a substantially circular insertion opening 36 having a size through which the gas injection portion 23 passes through the bag body 31 and the gas generator 20 does not pass through at the location where the first attachment protrusion 24 and the second attachment protrusion 25 are provided. Is open. The insertion opening 36 is formed in a size close to or the minimum that the gas generating portion 22 can pass through.

  As shown in FIG. 20 and FIG. 23, the cover cloth 71 having a substantially elongated rectangular shape is disposed outside the bag body 31 and at least at a position covering the insertion port 36. The cover cloth 71 is formed of the same material as the bag body 31. The cover cloth 71 is coupled to the bag body 31 by a coupling portion. The joint is constituted by a pair of side edge joints 72 and an edge joint 73. The both-side edge coupling portions 72 extend in the vertical direction which is a direction along the axis L1 of the generator body 21 in a state of being separated from each other. The edge connecting portion 73 extends in a direction intersecting (in the second embodiment, orthogonal to) the axis L 1 and is connected to the lower end portion of the both-side edge connecting portion 72.

  A cover cloth 71, between the upper end 71a which is the end far from the insertion port 36 in the direction along the axis L1, and the bag body 31, an insertion portion 74 for inserting the gas generator 20 and It is done.

  The insertion port 36 is located in a portion of the bag body 31 which is sandwiched by the side edge coupling portions 72. The insertion opening 36 is covered by a portion of the cover cloth 71 which is sandwiched by the both-side edge joint portion 72. Locking holes 75 are formed in two places of the cover cloth 71 which are sandwiched by the both-sides edge joint portion 72 and which are vertically separated from each other. The locking holes 75 are not formed in the bag body 31.

  The gas injection portion 23 of the gas generator 20 is inserted into the insertion port 36 and disposed inside the bag body 31 through the insertion port 36. As shown in FIGS. 19 and 20, the first attachment protrusion 24 and the second attachment protrusion 25 are disposed outside the bag body 31 and inserted into the corresponding locking holes 75. The cover cloth 71 is locked to the first attachment protrusion 24 and the second attachment protrusion 25 by these insertions. The portion of the generator body 21 where at least the first attachment protrusion 24 and the second attachment protrusion 25 are provided is disposed between the cover cloth 71 and the bag body 31 in the region sandwiched by the both-sides edge joint 72 And is covered by the cover cloth 71. In the second embodiment, the cover cloth 71 covers most of the generator body 21 except for the upper part thereof.

  As shown in FIGS. 20 to 22, an insertion assisting tool 76 is disposed inside the bag body 31 at a position corresponding to the gas generator 20. The insertion assisting tool 76 includes a cylindrical portion 77, a plate portion 78, and a restricting portion 79. The insertion aid 76 is formed of a material having heat resistance higher than that of the bag body 31, in this case, a metal material. The cylindrical portion 77 is open at both upper and lower ends, and has a cylindrical shape larger in diameter than the insertion port 36, and can not pass through the insertion port 36. The cylindrical portion 77 is disposed at a position adjacent to the lower side of the insertion port 36. The cylindrical portion 77 covers at least the gas ejection portion 23 of the gas generator 20. In the second embodiment, the cylindrical portion 77 covers a part of the gas generating portion 22 in addition to the whole of the gas jetting portion 23. Here, “a part” refers to a portion below the first attachment protrusion 24 in the gas generation unit 22 and adjacent to the gas ejection unit 23.

  The plate-like portion 78 sandwiches the insertion port 36 in the vertical direction which is a direction along the axis L 1 from the peripheral edge of the cylindrical portion 77 on the side away from the cover cloth 71 in the radial direction of the cylindrical portion 77. It extends upward, which is the opposite side to the gas injection part 23, and is held by the bag body 31.

  The restricting portion 79 is provided at an upper end portion which is an end portion of the plate portion 78 opposite to the cylindrical portion 77. The regulating portion 79 is provided with a folded back portion 79 a on the opposite side to the bag body 31. The folded back portion 79 a is folded back at the upper end portion of the plate-like portion 78.

  As shown in FIG. 23 and FIG. 24, inside the bag main body 31 and at a portion corresponding to the cover cloth 71, an inner cloth 81 having a substantially elongated rectangular shape is disposed. The inner cloth 81 is formed of the same material as the bag body 31. An insertion port 82 is formed at a position facing the insertion port 36 in the inner cloth 81 in a state of being in communication with the insertion port 36. The insertion port 82 is formed longer than the insertion port 36 to the upper side which is the side away from the cylindrical portion 77 of the insertion assisting tool 76.

  The inner cloth 81 is coupled to the bag body 31 by a coupling portion. The joint is constituted by a pair of side edge joints, an edge joint, a peripheral joint 83 and a pair of guide joints 84. The side edge coupling portions extend in the vertical direction in a state of being separated from each other, and are constituted by the side edge coupling portions 72 described above. The edge coupling portion extends in a direction intersecting (orthogonal to) the axis L 1 and is connected to the lower end portion of the both-side edge coupling portion 72, and is constituted by the edge coupling portion 73 described above. As described above, the inner cloth 81 is joined (co-stitched) to the bag body 31 by utilizing the both-side edge joining portion 72 and the edge joining portion 73 which couple the cover cloth 71 to the bag body 31.

  The peripheral coupling portion 83 has a substantially arc shape and surrounds the insertion port 36 and the insertion port 82. The two guide coupling portions 84 are provided at positions sandwiching the plate-like portion 78 from both sides in the width direction. The two guide coupling portions 84 extend in the vertical direction which is the longitudinal direction of the plate-like portion 78 in parallel with each other. A lower end portion which is an end portion on the insertion port 36 and the insertion inlet 82 side of each guide coupling portion 84 is connected to an end portion of the peripheral edge coupling portion 83.

  The plate-like portion 78 of the insertion aid 76 is inserted from between the peripheral portion of the insertion opening 36 in the bag body 31 and the peripheral portion of the insertion opening 82 in the inner cloth 81. By being disposed in an area between the two guide coupling portions 84, the bag main body 31 holds the bag.

  Further, the restricting portion 79 of the insertion assisting tool 76 is exposed from between the bag body 31 and the inner cloth 81 and approaches the upper end edge 81 a of the inner cloth 81. The folded portion 79 a of the regulating portion 79 sandwiches the inner cloth 81 together with the plate-like portion 78.

The configuration other than the above is the same as that of the first embodiment. Therefore, the same components as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.
Next, the operation and effects of the second embodiment will be described.

First, the procedure for assembling the insertion aid 76 to the air bag 30 will be described. This assembly is performed before the gas generator 20 is assembled to the air bag 30.
As shown in FIGS. 24 and 26A, the plate-like portion 78 and the restricting portion 79 of the insertion assisting tool 76 are the peripheral portion of the insertion opening 36 in the bag body 31 and the peripheral edge of the insertion inlet 82 in the inner cloth 81. It is inserted from between the part and disposed in the area between the bag body 31 and the inner cloth 81 and sandwiched by the two guide coupling parts 84.

  Here, since the insertion port 82 is formed longer to the upper side than the insertion port 36, the bag main body 31 is inserted outside the portion of the insertion port 82 which is longer than the insertion port 36. A portion (upper portion) of the peripheral portion of the mouth 36 is located. This portion 85 (see FIG. 23) functions as a mark when the plate-like portion 78 and the restricting portion 79 are inserted between the bag main body 31 and the inner cloth 81. This mark makes it easy to find out where to insert the plate-like portion 78 and the regulating portion 79 between the bag body 31 and the inner cloth 81. Furthermore, by bringing the upper end of the plate portion 78 into contact with the portion 85 and sliding it upward, the plate portion 78 and the restricting portion 79 are between the bag body 31 and the inner cloth 81 and both guide coupling portions It can be easily inserted into the area sandwiched by 84.

  The two guide coupling portions 84 function to guide the insertion of the plate-like portion 78 and the restricting portion 79 between the bag body 31 and the inner cloth 81. The above insertion is performed until the whole of the restricting portion 79 is exposed from between the bag body 31 and the inner cloth 81. After the entire restricting portion 79 is exposed, the insertion aid 76 is slid downward. Along with this, the upper portion of the inner cloth 81 is sandwiched by the plate-like portion 78 and the folded back portion 79 a of the regulating portion 79. In this state, as shown in FIG. 21, the plate-like portion 78 extends from the cylindrical portion 77 in the direction along the axis L1 to the opposite side of the gas injection portion 23 across the insertion port 36. And, by being sandwiched between the bag body 31 and the inner cloth 81, the bag body 31 holds the bag. Therefore, in order to hold the plate-like portion 78 in the bag body 31, it is not necessary to provide a special structure. Also, the plate-like portion 78 and the restricting portion 79 can be inserted simply into a region between the bag main body 31 and the inner cloth 81 and in the region sandwiched by the two guide coupling portions 84. 78 can be held in the bag body 31; In the held state, the plate-like portion 78 is restricted in its movement in the width direction by the two guide coupling portions 84.

  The restricting portion 79 exposed from between the bag body 31 and the inner cloth 81 abuts on the upper edge 81 a of the inner cloth 81, thereby restricting the movement of the plate-like portion 78 to the lower side (cylindrical portion 77 side). . Therefore, it is possible to restrict the plate-like portion 78 from falling between the bag body 31 and the inner cloth 81 by the restricting portion 79.

  The cylindrical portion 77 has a diameter larger than that of the insertion port 36 and can not pass through the insertion port 36. Therefore, the cylindrical portion 77 contacts the peripheral portion of the insertion opening 82, whereby the insertion is performed. The upward movement of the aid 76 is restricted. Therefore, the cylindrical portion 77 can regulate that the plate-like portion 78 is pulled upward from between the bag body 31 and the inner cloth 81.

  As described above, in the state where the insertion assisting tool 76 is held by the bag body 31, as shown in FIGS. 26 (a) and 26 (b), the cylindrical portion 77 is below the insertion port 36 and the insertion port 82. Located at a point adjacent to the side. The plate-like portion 78 extends from the peripheral edge portion of the cylindrical portion 77 on the side away from the cover cloth 71 in the radial direction of the cylindrical portion 77. Therefore, at least the peripheral portion of the insertion opening 36 in the bag main body 31 and at least the peripheral portion of the insertion opening 82 in the inner cloth 81 are covered with the cover cloth 71 by the tubular portion 77 and the plate portion 78. It is deformed to move away from the inside of the

  Next, a procedure for assembling the gas generator 20 to the air bag 30 will be described. This assembly is performed on the air bag 30 in which the insertion assisting tool 76 is assembled as described above. In addition, this assembly can be performed in a state in which the air bag 30 is folded, for example, in a state according to the storage form described above (a state before the gas generator 20 is assembled).

  At the time of this assembly, the cover cloth 71 is removed to move it away from the bag body 31, and as shown in FIGS. 25 and 26 (a) and (b), the insertion portion 74 is expanded (largely opened).

The gas generator 20 is inserted between the bag body 31 and the cover cloth 71 from the insertion portion 74 expanded as described above in the order of the gas injection portion 23 and the gas generation portion 22.
In the process of this insertion, at least a portion of the generator body 21 at which the first attachment protrusions 24 and the second attachment protrusions 25 are provided is between the cover cloth 71 and the bag body 31 and both side edge joining portions 72 Into the area sandwiched by In other words, at least a portion of the generator body 21 at which the first attachment protrusion 24 and the second attachment protrusion 25 are provided is a cover cloth disposed outside the bag body 31 and coupled to the bag body 31. Covered by 71. Along with the insertion, the gas injection portion 23 approaches the insertion port 36 and the insertion port 82, and the first mounting protrusion 24 and the second mounting protrusion 25 approach the corresponding locking holes 75.

  Then, in the process of the insertion, the gas injection portion 23 is sequentially inserted into the insertion opening 36 of the bag body 31 and the insertion opening 82 of the inner cloth 81, and the bag body is inserted through the insertion opening 36 and the insertion opening 82. It is placed inside 31. The lower end portions of the gas injection portion 23 and the gas generation portion 22 enter the cylindrical portion 77.

  At this time, at least the peripheral portion of the insertion opening 36 of the bag main body 31 and at least the peripheral portion of the insertion opening 82 of the inner cloth 81 are separated from the cover cloth 71 by the insertion aid 76 as described above. It has been deformed to move away to the inside of the. The insertion port 36 is inclined with respect to the axis L1 of the gas generator 20. Therefore, the gas injection part 23 can be smoothly inserted into the insertion port 36 and the insertion port 82.

  Further, in the middle of the insertion of the gas injection part 23 into the insertion port 36 and the insertion port 82, as shown in FIG. 20, the first attachment protrusion 24 and the second attachment protrusion 25 correspond to the corresponding engagement of the cover cloth 71. The hole 75 is inserted. By the insertion, the first attachment protrusion 24 and the second attachment protrusion 25 are positioned with respect to the bag body 31 via the cover cloth 71. In this manner, the gas generator 20 is assembled to the air bag 30 with the first mounting protrusion 24 and the second mounting protrusion 25 positioned.

Next, the operation and effect when the expansion gas is ejected from the gas ejection part 23 of the gas generator 20 will be described.
The inflation gas jetted from the gas jet unit 23 is supplied to the bag body 31. Under the present circumstances, as shown in FIG. 20, since the clearance gap between each peripheral part of the insertion port 36 and the insertion inlet 82, and the gas generator 20 is made small, the expansion gas jetted from the gas jet part 23 is: As in the first embodiment, it is difficult for the air bag 30 to leak through the gap.

  Further, in the second embodiment, the insertion port 36 and the insertion port 82 into which the gas jet portion 23 of the gas generator 20 is inserted are covered by the cover cloth 71 from the outside of the bag body 31. Therefore, even if the inflation gas passes through the gaps between the gas generator 20 and the respective peripheral edge portions of the insertion port 82 and the insertion port 36, it does not pass between the bag body 31 and the cover cloth 71, It can not leak out of the bag 30. Therefore, compared with the case where the insertion port 82 and the insertion port 36 are not covered by the cover cloth 71, leakage of the inflation gas to the outside of the airbag 30 can be further suppressed.

  By the way, when the inflation gas is ejected from the gas ejection portion 23, a force in the direction along the axis L1 is applied to the bag body 31, and the bag body 31 is pulled in the same direction with the insertion port 36. In this regard, in the second embodiment, the cover cloth 71 is joined to the bag body 31 by the edge joint portion 73 at a location near the insertion opening 36, and the same location is reinforced. Therefore, even if the insertion port 36 is pulled in the direction along the axis L1, excessive deformation in the same direction can be suppressed. As a result, it is possible to suppress the gas injection portion 23 from coming out of the bag body 31 through the insertion port 82 and the insertion port 36.

  In particular, in the second embodiment, the inner cloth 81 is joined to the bag body 31 by the edge joint portion 73, so that the bag cloth 31 is added to the cover cloth 71 at the location near the insertion port 36 and the inner cloth 81 is formed. Will be joined by the edge joint 73. Therefore, the same place is further reinforced. Therefore, even if the insertion port 36 is pulled in the direction along the axis L1, excessive deformation in the same direction can be effectively suppressed.

  The cylindrical portion 77 covers the gas injection portion 23 inserted into the insertion port 36 and the insertion port 82. The cylindrical portion 77 is formed of a metal material which is a material having heat resistance higher than that of the bag body 31. Therefore, when the inflation gas is ejected from the gas ejection portion 23, the cylindrical portion 77 receives the inflation gas, and the expansion gas restricts direct contact with the inner cloth 81 and the bag body 31. Therefore, the influence of the heat of the inflation gas on the inner cloth 81 and the bag body 31 can be suppressed.

According to the second embodiment, the following effects can be obtained in addition to the above.
In the second embodiment, as in the first embodiment, the locking holes for inserting the first attachment protrusions 24 and the second attachment protrusions 25 into the bag body 31 are not formed. Therefore, unlike Patent Document 1, the inflation gas does not leak from the gap between the peripheral edge portion of the locking hole of the bag body 31 and the first attachment protrusion 24 and the second attachment protrusion 25, and the airbag 30 is not Leakage of the expansion gas can be further suppressed.

  A pair of side edge couplings 72 and edge couplings 73 for coupling the cover fabric 71 to the bag body 31 are utilized to couple the inner fabric 81 to the bag body 31. Therefore, compared with the case where the cover cloth 71 and the inner cloth 81 are coupled to the bag body 31 by separate coupling portions, the number of coupling portions and the process for coupling can be reduced.

  In addition, by forming the guide coupling portion 84 and the peripheral edge coupling portion 83, the inner cloth 81 is first coupled to the bag body 31, and thereafter, the side edge coupling portion 72 and the edge edge coupling portion 73 are formed. The cloth 71 and the inner cloth 81 can be joined (co-stitched) to the bag body 31.

Each embodiment mentioned above can also be implemented as a modification which changed this as follows.
<Items concerning only the first embodiment>
-As the generator main body 21 of the gas generator 20, what is comprised by covering the gas injection part 23 and the gas generation part 22 with a cylindrical retainer may be used. In this case, the retainer constitutes the outer peripheral portion of the generator body 21. The retainer is fastened to the gas generator 22 by means such as caulking. The first mounting protrusion 24 and the second mounting protrusion 25 are provided on the retainer instead of the generator body 21.

  -As described above, when the generator body 21 is constituted by the gas injection portion 23, the gas generation portion 22 and the retainer, the following two modes are examples of assembling the generator body 21 to the airbag 30: is there.

  First aspect: Of the generator main body 21 in which the gas ejection portion 23 and the gas generation portion 22 are attached to the retainer, a portion closer to the gas ejection portion 23 than the first attachment protrusion 24 is inserted into the insertion port 36 In this embodiment, the first attachment protrusion 24 and the second attachment protrusion 25 are disposed outside the bag body 31.

  Second aspect: an aspect in which the retainer, the gas injection part 23 and the gas generation part 22 are separately assembled to the air bag 30. In this embodiment, the portion of the retainer on the side closer to the gas injection portion 23 than the first attachment projection 24 is first inserted into the insertion port 36 to be disposed inside the bag body 31, and the first attachment projection 24 and the 2) The mounting projection 25 is disposed outside the bag body 31. Thereafter, the gas injection part 23 and the gas generation part 22 are inserted into the retainer, whereby the gas injection part 23 is inserted into the insertion port 36 and disposed inside the bag body 31.

  In either of the first aspect and the second aspect, the gas generator 20 has the first attachment protrusion 24 and the second attachment protrusion 25 protruding in the direction orthogonal to the axis L1. Therefore, by arranging the first attachment protrusion 24 and the second attachment protrusion 25 outside the bag body 31, the insertion port 36 and the insertion hole 39 can be made smaller, and the leakage of inflation gas from the air bag 30 can be suppressed. Is obtained.

  A cover formed of a material having heat resistance higher than that of the bag body 31 and covering the gas ejection portion 23 may be disposed in the vicinity (adjacent location) of the insertion port 36 inside the bag body 31. By so doing, direct contact of the inflation gas jetted from the gas jetting unit 23 with the bag body 31 can be suppressed.

  The belt 41 may extend in the circumferential direction of the generator body 21. Also in this case, the intermediate portion 45 of the belt 41 is preferably disposed at a position covering the insertion port 36, and the intermediate portion 45 can be expected to have an effect of suppressing the leakage of the gas for expansion.

  The pair of auxiliary belts 51 may be formed by separate pieces of cloth. In this case, one end 52 of each of the auxiliary belts 51 is disposed at a position adjacent to each other in the circumferential direction of the generator body 21 and coupled to the bag body 31.

The two end portions 52 may be arranged at intervals, and may be disposed at locations adjacent in the circumferential direction of the generator main body 21. In this case, the insertion holes 39 may be omitted.
The order of locking the belt 41 and the auxiliary belts 51 to the second attachment protrusions 25 may be changed.

The leading end 43 of the belt 41 may be locked to the gas generator 20 at a location different from the second attachment protrusion 25.
Similarly, the end 54 of the auxiliary belt 51 may be locked to the gas generator 20 at a point different from the second attachment protrusion 25.

<Items concerning only the second embodiment>
· The size and shape of the cover cloth 71 cover the insertion opening 36 and cover at least a portion of the generator body 21 where the first mounting protrusion 24 and the second mounting protrusion 25 are provided. , Can be changed. For example, as the cover cloth 71, one having a size and a shape that covers the insertion port 36 and the whole of the generator main body 21 may be used.

The insertion assisting tool 76 and the inner cloth 81 may be omitted. Even in this case, the effect of suppressing the leakage of the inflation gas to the outside of the airbag 30 can be obtained.
In this case, as described as a matter related to only the first embodiment, the generator main body 21 of the gas generator 20 is configured by covering the gas injection portion 23 and the gas generation portion 22 with a cylindrical retainer. May be used.

  The plate-like portion 78 may be held by the bag body 31 using a structure different from the structure sandwiched by the bag body 31 and the inner cloth 81. For example, the plate-like portion 78 may be held by the bag body 31 without the inner cloth 81 being used.

The insertion assisting tool 76 may be formed of a material different from metal, provided that the material has heat resistance higher than that of the bag body 31.
The cylindrical portion 77 of the insertion assisting tool 76 may cover only the gas ejection portion 23 of the gas generator 20.

The inner cloth 81 may be coupled to the bag body 31 by a joint different from the cover cloth 71.
<Matters Common to First and Second Embodiments>
· At least one of the first attachment protrusion 24 and the second attachment protrusion 25 in the gas generator 20 is changed to a member different from the bolt, provided that the generator body 21 can be fixed to the vehicle May be

  The attachment protrusions may be provided at three or more places in the generator main body 21 in the direction along the axis L1. In this case, all the attachment protrusions may be fixed to the side frame portion 15 in the same form (for example, fastening by a bolt and a nut) or may be fixed in different forms.

The gas generator 20 may be configured by the generator body 21 and one attachment protrusion.
The bag body 31 of the air bag 30 may be composed of the portion which is substantially inflated as in the above-described embodiments, but the inflation gas is not supplied and the non-inflatable portion is not inflated. May be included in part.

-The inside of bag body 31 may not be divided into a plurality of rooms (expansion room), but may be constituted by one room.
The size of the insertion port 36 in the bag main body 31 may be changed to a size through which the gas injection part 23 passes but the gas generation part 22 does not pass.

<About the type of applicable airbag device>
The air bag apparatus includes a gas generator having a generator body and a mounting protrusion, and an air bag deployed and inflated by an inflation gas jetted from a gas jet portion, and the gas generator and the air bag are mounted The present invention is also applicable to different types of airbag devices than the side airbag devices, as long as the protrusions can be attached to the vehicle.

  One of them is a knee protecting airbag device (also called a knee airbag device). This type of air bag device protects a part from the shin part to the knee part of the occupant by inflating the bag body in front of and below the lower legs of the occupant seated on the vehicle seat in response to an impact applied to the vehicle. It is a thing.

  Besides, the airbag device is also applicable to a seat cushion airbag device. In this type of air bag apparatus, in response to an impact applied to a vehicle, a bag main body disposed in a seat cushion of a vehicle seat is inflated with inflation gas to raise a seat surface, and an occupant on the seat cushion moves forward It regulates to move.

<Others>
-In the vehicle in which the vehicle seat 12 is disposed in a direction in which the seatback 14 faces in a direction different from the front of the vehicle, for example, the side, the side airbag device is lateral to the vehicle seat 12 The present invention can also be applied to a side airbag device of a type that protects the occupant P1 from the impact when the impact is applied from the front-rear direction).

  In the upper body of the occupant P1, the portion protected by the side airbag device may be changed to a portion different from the above embodiment. In this case, the shape and size of the airbag 30 are changed to a shape and size that can protect the portion targeted by the occupant P1.

The vehicles to which the above-described airbag device is applied include various industrial vehicles as well as private vehicles.
-The above-mentioned air bag device is applicable also to an air bag device equipped with a vehicle seat in vehicles other than vehicles, for example, an aircraft, a ship, etc.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle (vehicle), 11 ... Side wall part, 12 ... Seat for vehicles (seat for vehicles) 20 ... Gas generator, 21 ... Generator main body, 23 ... Gas ejection part, 24 ... 1st attachment protrusion (attachment protrusion) , 25: second attachment projection (attachment projection), 30: air bag, 31: bag body, 36: insertion port, 41: belt, 42: base end, 43: tip, 45: middle part, 46: Long holes 47, positioning portions 48, 55, 75 Locking holes 51 Auxiliary belts 52 Ends 71 Cover fabric 76 Insertion aids 77 Tubular portions 78 Plates Shaped part, 79: restriction part, 81: inner cloth, 81a: upper end edge (edge), 82: insertion port, 84: guide joint part, L1: axis of generator main body, P1: occupant.

Claims (18)

A gas generator comprising a generator body extending along an axis and having a gas jet at one end, and having a mounting projection projecting from an outer surface surrounding the axis in the generator body;
An airbag having a bag body that is deployed and inflated by the inflation gas supplied from the gas jetting unit, wherein the gas generator and the airbag are attached to a vehicle at the attachment projections,
The bag body is provided with an insertion port having a size through which the gas injection portion passes, and the gas generator does not pass at a location where the mounting protrusion is provided,
The said gas injection | spray part is arrange | positioned inside the said bag main body through the said insertion port, and the said attachment protrusion is arrange | positioned to the exterior of the said bag main body. A belt having one end as a proximal end and the other end as a distal end is disposed outside the bag body.
The airbag device according to claim 1, wherein the proximal end portion of the belt is coupled to the bag body, and the distal end portion is locked to a portion of the gas generator separated from the gas jetting portion.   The airbag device according to claim 2, wherein an intermediate portion of the belt between the proximal end portion and the distal end portion is disposed at a position covering the insertion port.   The airbag apparatus according to claim 3, wherein the belt extends along the axis. The mounting protrusions are provided at two places in a direction along the axis,
Of the two mounting projections, one close to the gas ejection part is constituted by the first attachment projection, and one distant from the gas ejection part is constituted by the second attachment projection,
5. The airbag device according to claim 4, wherein the belt is hooked to the first mounting protrusion at a location adjacent to the proximal end portion and is locked to the second mounting protrusion at the distal end portion. The belt is configured to be foldable with the proximal end coupled to the bag body as a fulcrum.
The belt is formed with an elongated hole extending from the proximal end toward the distal end and through which the first attachment protrusion is inserted.
Where the proximal end of the belt is joined to the bag body, the elongated hole overlaps the insertion opening,
At the portion where the long hole and the insertion port overlap, the first mounting protrusion inserted into the long hole is engaged in a state where the gas ejection part is inserted into the insertion port, and the same. The airbag device according to claim 5, wherein a positioning portion for positioning the first mounting protrusion is formed. A locking hole is formed at the tip of the belt,
The belt is engaged with the second attachment protrusion by inserting the second attachment protrusion of the gas generator in a state in which the first attachment protrusion is engaged with the positioning portion. The air bag device according to claim 6. The generator body has a cylindrical shape,
An auxiliary belt wound around the generator body is disposed outside the bag body;
One end of the auxiliary belt is coupled to the bag body, and the other end is a portion of the gas generator that is spaced from the one end of the auxiliary belt in the circumferential direction of the generator body. The airbag apparatus according to any one of claims 2 to 7, which is locked. As the auxiliary belt, a pair of auxiliary belts which are connected to the bag body in a state in which one end portions are adjacent to each other are used.
9. The air bag device according to claim 8, wherein the respective auxiliary belts are wound in mutually opposite directions in the circumferential direction with respect to the generator body, and are locked to the gas generator at the other end. A locking hole is formed at the other end of the auxiliary belt,
10. The airbag device according to claim 8, wherein the auxiliary belt is locked to the mounting protrusion by the mounting protrusion being inserted into the locking hole. A cover cloth covering the insertion port and covering at least a portion of the generator main body provided with the attachment projection is disposed outside the bag main body and is coupled to the bag main body.
A locking hole is formed in the cover cloth,
In the gas generator in which the gas injection portion is disposed inside the bag body through the insertion port, the attachment protrusion disposed outside the bag body is inserted into the locking hole. The airbag apparatus as described in.   An insertion assisting tool for assisting the insertion of the gas injection portion into the insertion opening by deforming at least a peripheral portion of the insertion opening of the bag main body away from the cover cloth to the inside of the bag main body. The airbag device according to claim 11, further comprising: The insertion assisting tool includes a tubular portion and a plate-like portion, and is disposed inside the bag body,
The cylindrical portion is disposed at a position adjacent to the insertion port and covers at least the gas injection portion of the generator main body,
The plate-like portion is the gas jet portion from the peripheral edge of the cylindrical portion on the side away from the cover cloth in the radial direction of the cylindrical portion, in the direction along the axis, sandwiching the insertion port. The air bag device according to claim 12, wherein the air bag device extends to the opposite side and is held by the bag body. An inner cloth is disposed inside the bag body and coupled to the bag body,
An insertion port is formed at a position facing the insertion port in the inner cloth, in communication with the insertion port,
The airbag device according to claim 13, wherein the plate-like portion of the insertion assisting tool is held by the bag body by being disposed between the bag body and the inner cloth.   The airbag apparatus according to claim 14, wherein the insertion port is formed longer than the insertion port in a direction away from the cylindrical portion of the insertion assisting tool.   A part of the connecting portion for connecting the inner cloth to the bag body is provided at a position sandwiching the plate-like portion from both sides in the width direction of the plate-like portion, and extends in the length direction of the plate-like portion The airbag device according to claim 14 or 15, further comprising a pair of guide coupling portions for guiding insertion of the plate-like portion between the bag body and the inner cloth. The insertion assisting tool is provided at an end of the plate-like portion opposite to the cylindrical portion, and includes a restricting portion exposed from between the bag body and the inner cloth.
The air according to any one of claims 14 to 16, wherein the restricting portion restricts the movement of the plate-like portion toward the cylindrical portion by abutting on the end edge of the inner cloth. Bag equipment.   The air bag is seated on the vehicle seat by expanding and expanding between the side wall and the vehicle seat when an impact is applied to the side wall of the vehicle from the side. The airbag apparatus according to any one of claims 1 to 17, which protects an occupant from impact.