JP5243788B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device configured by housing a folded airbag and a rod-like inflator for inflating and deploying the airbag in a case body.

  This type of airbag apparatus includes side airbags, curtain airbags, knee airbags (knee protection airbags), and other airbag apparatuses that deploy the airbag in one direction from the attachment part. There are airbag devices that deploy in the direction.

In this type of conventional airbag apparatus, the one described in Patent Document 1 is known as an example.
JP-A-2005-219706.

According to this (for reference, the reference numerals used in Patent Document 1 are assigned as they are), the airbag 47 folded inflatable by flowing in the inflation gas, and the airbag 47 can be stored. A case 11 having a bottomed box shape and provided with an opening 11a for protruding an airbag. The airbag 47 has a retainer 19 at the periphery of a gas inlet through which inflation gas flows. A substantially cylindrical inflator 30 that supplies the inflation gas to the airbag 47 is disposed outside the case 11 and is capable of discharging the inflation gas. The retainer 19 is formed in a substantially flat plate shape that is arranged along the inner peripheral surface of the case 11, and the gas inlet of the airbag 47 is formed between the inner peripheral surface of the case 11 and the retainer 19. 47a The flat plate portion 20 that can hold the periphery of the gas inlet 47a by sandwiching the vicinity of the edge, protrudes from the flat plate portion 20 to the inflator 30 side through the case 11 and the airbag 47, and gas in the inflator 30 Covers the periphery of the discharge port 32a and allows the inflation gas discharged from the gas discharge port 32a to be guided into the airbag 47. The flat plate portion 20 passes through the case 11 and the airbag 47. And a holding portion 27 for attaching the inflator 30 to the case 11 and attaching the retainer 19 to the case 11 using the inflator 30 as a scissors. It is configured.

  And according to description of patent document 1, in the airbag apparatus which has this structure, the retainer 19 arrange | positioned in the airbag 47 is made to protrude the holding | maintenance part 27 and the cover part 23 from the case 11. As shown in FIG. When the inflator 30 is housed in the case 11 together with the airbag 47 and the gas discharge port 32a is disposed in the cover portion 23 and attached to the holding portion 27, the airbag 47 and the inflator 30 are attached to the case. The inflator 30 is attached to a holding portion 27 disposed so as to be discharged from the case 11 by being pressed to the case 11 side, and the retainer 19 is used by using the inflator 30 as a bag. If the air bag 47 is attached to the case 11, the inflator 30 can retain the retainer even when the airbag 47 is deployed and inflated. The retainer 19 can be firmly held so as not to move with respect to the case 11, and as a result, the retainer 19 can be compared with a type of airbag device that uses only bolts to fix the retainer to the case. It is said that the number of bolts to be attached to the case 11 can be reduced, and the number of work steps for fastening the nut to the bolt can be reduced.

  However, according to the above-described configuration, the retainer 19 is used when attaching the peripheral edge of the gas inflow port through which the inflation gas flows into the airbag 47 to the case 11, so that not only the number of parts is large, but also the retainer 19 The increase in work man-hours due to mounting man-hours cannot be wiped off.

  In addition, the inflator 30 has a cover part 23 and a holding part 27 that are formed so as to protrude from the case 11 in order to use the retainer 19 outside the case 11 so as to be used as a bag. On the bag 47 side, it has a gas inlet 47a through which the cover portion 23 is inserted, and it is necessary to form insertion holes 47b and 47c through which the holding portion 27 is inserted, and the gas inlet 47a and the insertion holes 47b, The peripheral portion of 47c is configured to be sandwiched between the case 11 and the retainer 19 so as to be in contact with the surface using a bolt 20a.

Accordingly, even if the gas inlet 47a and the peripheral portions of the insertion holes 47b, 47c are sealed by the sandwiching structure per surface, the sealing function of these portions does not perform uniformly over the entire surface, and is inevitably non-uniform. would be, for inflation gas discharged from the inflator 30, not to I want to leak from the site, to increase the portion tightened by the bolt 20a and the gas inlet 47a and through hole 47b, the peripheral edge of 47c The structure of the part must be considerably devised.

  Therefore, in view of the above, the present invention reduces the number of parts by reducing the number of parts by eliminating the retainer that has been used to attach the peripheral edge of the gas inlet of the airbag to the case. To provide an airbag apparatus that prevents inflation gas from escaping to the outside with a simple structure by pressing the airbag toward the case side using the pressure inside the airbag inflated by the inflating gas to be ejected. It is aimed.

An airbag apparatus according to the present invention is an airbag apparatus configured to include a folded airbag, a rod-like inflator that inflates and deploys the airbag, and a case body that houses the airbag. The case body has a bag housing main body for housing the airbag, and an inflator housing formed integrally so as to protrude in a state of communicating with the bag housing main body for housing the inflator. The inflator accommodating portion has a pair of upstanding walls opposed to each other, forms the inflator mounting portion in the airbag, and faces one of the standing walls in the inflator mounting portion. Insertion through which one end side of the inflator housed in the inflator housing part including the gas outlet is inserted into one opposing wall It is formed and a mounting hole provided in said one upright wall, and, in a state in which the inflator is inserted through into the insertion hole and the mounting hole, inside of the case body, the periphery of the insertion hole of the attachment hole Further, the other end side of the inflator is joined to the inner wall surface of the other rising wall together with the other facing wall facing the other rising wall in the inflator accommodating portion. The inflator is mounted on the inflator accommodating portion by pressing.

  With this configuration, after one end side of the inflator housed in the inflator housing portion is inserted into the insertion hole formed in one opposing wall in the inflator mounting portion and the mounting hole provided in one standing wall of the inflator housing portion in the case body Protruding to the outside, the peripheral edge of the insertion hole of the inflator mounting portion in the airbag is brought into contact with the inner wall of one upright wall, and the other end side of the inflator is attached to the case body together with the other opposing wall of the inflator mounting portion. Since the inflator is configured to be pressed against the inner wall surface of the other upright wall of the inflator accommodating portion, the inflator has a so-called airbag internal arrangement configuration that is mounted inside the airbag, and has been used in the past. Can reduce the number of parts and reduce the number of inflator installation steps. In addition, on one end side of the inflator, the peripheral edge portion of the insertion hole on the airbag side is attached to the inner wall side of one upright wall of the inflator housing portion in the case body, and the bag internal pressure generated when the airbag is inflated The peripheral edge of the insertion hole is in close contact with the inner wall side of one of the standing walls, and gas leakage at this part can be shut off. In addition, the other end side of the inflator is connected to the other facing wall of the inflator mounting portion. By being pressed against the inner wall surface of the other upright wall of the inflator accommodating portion in the case body, the gas leakage at this portion can be blocked.

  In the present invention, a bolt is planted on the other end side of the inflator, the bolt is installed on the other standing wall so as to protrude outward from the other standing wall, and the bolt A nut is screwed into a portion protruding from the other standing wall, and the bolt is attached to the other standing wall, thereby pressing the other end of the inflator against the inner wall surface of the other standing wall. You may do it.

  With this configuration, a nut is screwed into a bolt planted on the other end side of the inflator, and the bolt is attached to the other standing wall of the inflator housing portion in the case body, so that the other end side of the inflator is the other standing wall. Since it is configured to be pressed against the inner wall surface of the airbag, the degree of adhesion of the airbag sandwiched between the other end side of the inflator and the inner wall surface of the other standing wall further increases with respect to the other standing wall. Thus, gas leakage at this portion can be more reliably blocked.

  According to the present invention, a male screw portion is formed on one end side of the inflator, and a female screw portion into which the male screw portion is screwed is formed on an inner wall of a mounting hole provided in the one upright wall portion. You may make it comprise so that the other end side of the said inflator may be pressed on the inner wall surface of said other standing wall by screwing the said external thread part.

  With this configuration, the male threaded portion formed on one end side of the inflator is screwed into the female threaded portion provided on the inner wall of the mounting hole of one standing wall, so that the gap between the other end side of the inflator and the inner wall surface of the other standing wall is increased. As a result, the degree of adhesion of the airbag sandwiched between the airbag and the other upright wall is further increased, and gas leakage at this portion can be more reliably blocked.

  In the present invention, a contact piece is formed at a peripheral edge portion of the insertion hole provided in the airbag, and the contact piece is inserted into the insertion hole provided in the airbag by the inflator and the one upright is provided. You may make it comprise so that it may contact with the outer peripheral wall of the said inflator, when installing in a wall.

  With this configuration, the contact piece provided at the peripheral edge portion of the insertion hole is in contact with the outer peripheral wall of the inflator, so that the gas pressure due to the inflation gas from the inflator is received in a large area, and the inflator mounting portion of the airbag The degree of adhesion of the one standing wall to the inner wall surface at the peripheral edge portion of the insertion hole in the hole is further increased, and gas leakage at this portion can be more reliably blocked.

  According to the present invention configured as described above, one end side of the inflator housed in the inflator housing portion is provided on one standing wall of the inflator housing portion in the case body and the insertion hole formed in one opposing wall of the inflator mounting portion. And the outer periphery of the inflator mounting portion of the airbag is brought into contact with the inner wall of one upright wall, and the other end of the inflator is connected to the other side of the inflator mounting portion. Since the inflator is configured to be pressed against the inner wall surface of the other upright wall of the inflator accommodating portion in the case body together with the opposing wall, the inflator has a so-called airbag internal arrangement configuration that is mounted inside the airbag. Reduce the number of parts and reduce the number of inflator installation steps by eliminating the conventional retainer In addition, at the one end side of the inflator, the peripheral edge portion of the insertion hole on the airbag side is attached to the inner wall side of one upright wall of the inflator housing portion in the case body, and is generated when the airbag is inflated. The peripheral portion of the insertion hole is brought into close contact with the inner wall side of one of the standing walls due to the pressure in the bag, and gas leakage at this portion can be blocked. In addition, the other end side of the inflator is connected to the inflator mounting portion. By being pressed against the inner wall surface of the other upright wall of the inflator accommodating portion in the case body through the other facing wall, it is possible to close the gas and prevent gas leakage at this portion.

  Next, a first embodiment according to the present invention will be described with reference to FIGS.

  1 is a perspective view of an airbag device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a longitudinal sectional view of the airbag device drawn in FIG. 1, and FIG. FIG. 5 is an enlarged cross-sectional view of the main part in FIG. 3, and FIG. 5 is a perspective view of the inner bracket used when attaching to the body.

  First, in FIG. 1, an airbag device 10 is configured as a knee protection airbag device, and accommodates a folded airbag 20, a rod-like inflator 30 for inflating and deploying the airbag 20, and the airbag 2. And a case body 40 to be configured.

  The airbag 20 includes a bag main body portion 21 that protects the occupant's knee, an inflator attachment portion 22 that is formed so as to protrude from the bag main body portion 21 and the air chambers.

  As shown clearly in FIG. 2, the inflator mounting portion 22 is formed in a substantially box shape so as to protrude from the bag body portion 21, and has a pair of opposing walls 23 and 24 that stand up against each other. It is configured.

  Of the pair of opposing walls 23, 24, one opposing wall 23 is formed with an insertion hole 25 for inserting a main body body portion 32 which is one end side of an inflator 30 to which a socket 31 is attached at an end portion. Yes. The socket 31 is supplied with activation energy via a cable 31a with a connector.

  The inner diameter dimension of the insertion hole 25 is smaller than the outer diameter dimension of the main body trunk portion 32 in which the gas generating drug is sealed at one end of the main body trunk section 32 in the inflator 30. For example, when the outer diameter of the main body 32 is 25.5φ, when a 420 denier nylon fabric is used as the base fabric of the airbag 20, the inner diameter of one insertion hole 25 is used. Is 25φ.

  The case body 40 includes a bag housing main body portion 41 that houses the folded bag main body portion 21 of the airbag 2 and an inflator housing portion 42 that projects in a state communicating with the bag housing main body portion 41. The inflator accommodating portion 42 has a pair of upstanding walls 42a and 42b facing each other.

  A mounting hole 43 is formed in one of the standing walls 42a so that one end of the main body body 32 of the inflator 30 inserted through the insertion hole 25 of the one opposing wall 23 is inserted to the outside.

  Therefore, the main body 32 of the inflator 30 is inserted into the insertion hole 25 of the one opposing wall 23 of the inflator attachment part 22 of the airbag 20 and the attachment hole 43 of the one standing wall 42a. The part 25a is configured to be attached to one of the standing walls 42a.

  The other opposing wall 24 is formed with a mounting hole portion 26 through which a bolt 33b such as a stat bolt planted in a head 33 disposed on the other end side of the main body body portion 32 in the inflator 30 is passed ( (See FIG. 3). The head 33 is provided with a plurality of gas ejection ports 33a.

  Further, an inner bracket 45 having a substantially L shape is sandwiched between the inner wall of the other standing wall 42b and the other opposing wall 24 of the inflator mounting portion 22 of the airbag 20 using a double-sided adhesive tape or the like. A through hole 45a having several protrusions as shown in FIG. 4 is formed on one side of the inner bracket 45, and the through hole 45a is a mounting hole 44 formed in the other standing wall 42b. It corresponds to.

  Further, as shown in FIGS. 1 and 2, one side of the outer bracket 46 having an L-shape is brought into contact with the outer wall side of the other upright wall 42b. After the side is attached to the bottom wall portion 27 existing between the opposing walls 23 and 24 of the inflator mounting portion 22, the forked engagement portion 46a formed at the tip is engaged with the engagement piece 47 provided on the bottom wall portion 42c. It is installed by joining.

  At this time, an attachment through hole 46 b formed on one side of the outer bracket 46 communicates with the attachment hole 44.

  Therefore, the bolt 33b planted in the head 33 of the inflator 30 is inserted through the through-hole 45a of the inner bracket 45, the mounting hole portion 26 formed in the other opposing wall 24, and the mounting through-hole 46b of the outer bracket 46. And the nut 48 is screwed together, and the inflator 30 is accommodated in and attached to the inflator accommodating portion 42 in a state where the inflator 30 is accommodated in the inflator attachment portion 22.

  As shown in FIG. 3, the end surface of the head 33 of the inflator 30 is in pressure contact with one side of the inner bracket 45 and between the inner wall of the other standing wall 42 b and the inner bracket 45, The other opposing wall 24 in the inflator attachment part 22 is clamped.

  Here, the inflator 30 is accommodated together with the gas outlet 33a in the inflator attachment portion 22 in which the air chambers communicate with the bag body portion 21 of the airbag 20.

  By configuring as described above, the inflator housing in the case body 40 and the insertion hole 25 formed in the one opposing wall 23 in the inflator mounting portion 22 on one end side of the main body body portion 32 in the inflator 30 housed in the inflator housing portion 42. The peripheral edge 25a of the insertion hole 25 of the inflator attachment part 22 in the airbag 20 is made to protrude from the attachment hole 43 provided in one of the standing walls 42a of the part 42, and the inner wall of the one standing wall 42a. The other end side of the inflator 30 is pressed against the inner wall surface of the other upright wall 42b of the inflator accommodating portion 42 in the case body 40 together with the other opposing wall 24 of the inflator mounting portion 22. Therefore, the inflator 30 is a so-called airbag mounted inside the airbag 20. By disposing a retainer that has been used in the past, the number of parts can be reduced and the number of man-hours for installing the inflator 30 can be reduced. Moreover, as shown in FIG. On one end side of the body portion 32, the peripheral edge portion 25 a of the insertion hole 25 on the airbag 20 side is attached to the inner wall side of one standing wall 42 a of the inflator accommodating portion 42 in the case body 40, and when the airbag 30 is inflated. The generated bag internal pressure works in the direction of the arrow, and the peripheral edge portion 25a of the insertion hole 25 comes into close contact with the inner wall side of one of the standing walls 42a, so that gas leakage at this part can be blocked, The end surface of the head 33, which is the other end side of the inflator 30, is passed through the other opposing wall 24 of the inflator mounting portion 22 and the In close contact by being pressed against the inner wall surface of the other upright wall 42b of Fureta accommodating portion 42, so that it is possible to cut off the gas leak at this site.

  Further, a nut 48 is screwed into a bolt 33 b planted on the head 33 disposed on the other end side of the bag housing main body 41 in the case 42, and the bolt 33 b is connected to the other side of the inflator housing portion 42 in the case body 40. Since the other end side of the bag accommodating body portion 41 in the inflator 30 is pressed against the inner wall surface of the other standing wall 42b by being attached to the standing wall 42b, the other end of the bag accommodating body portion 41 in the inflator 30 is configured. The degree of adhesion of the airbag 20 sandwiched between the side wall and the inner wall surface of the other upright wall 42b to the other upright wall 42b is further increased, and gas leakage at this portion is more reliably blocked. Will be able to.

  Further, the inner bracket 45 has a function of deflecting the jet gas brought out in the direction opposite to the direction in which the airbag 20 is inflated out of the jet gas jetted from the gas jet port 33a of the inflator 30 and the airbag 20. It also performs the function of preventing the blown gas from hitting directly.

  The outer bracket 46 also serves as a washer for adjusting the position of the inflator 30 and tightening the nut 48. Further, the bifurcated engaging portion 46a of the outer bracket 46 can also serve as a rotation stop by engaging with the engaging protrusion 33c.

  The inflator 30 may be a pyrotechnic type (pyro technique), a storage type (storage), or a hybrid type, and is configured to inject a large amount of an inert gas such as nitrogen gas instantaneously.

  Next, another embodiment of the inflator 30 mounting structure according to the present invention will be described with reference to FIGS.

  First, according to the second embodiment of the present invention shown in FIG. 6, a flange portion 41a protruding outward is formed on one end side of the main body barrel portion 32 of the inflator 30, and one of the inflator accommodating portions 42 is formed. The other structure is the same as that of the first embodiment.

  According to the second embodiment, when the pressure inside the bag generated by the inflation of the airbag 20 is applied as indicated by the arrow, the peripheral edge 25a of the insertion hole 25 in the airbag 20 is directed to the one standing wall 42a. In this case, the flange portion 41a receives the pressing force, so that the peripheral edge portion 25a of the insertion hole 25 is more closely attached to the one standing wall 42a.

  Further, according to the third embodiment of the present invention shown in FIG. 7, the male screw portion 32 b is formed on one end side of the main body barrel portion 32 in the inflator 30 by pressing or the like, and one of the inflator accommodating portions 42 is formed. A cylindrical screw forming portion 42 a-1 is provided so as to protrude outwardly from the standing wall 42, and the mounting hole 43 is formed in a long dimension. The male screw portion 32 b is screwed to the inner wall of the mounting hole 43. The female threaded portion 42a-2 is provided, and a hemispherical engaging projection 33c is projected from the end face of the head 33 of the inflator 30, and the engaging recess 42b- into which the engaging projection 33c is engaged. 1 is formed on the other upright wall 42b of the inflator accommodating portion 42, which is different from the first embodiment, and other configurations are the same.

  With the configuration of the third embodiment, the male threaded portion 32b is screwed into the female threaded portion 42a-2 provided on the inner wall of the mounting hole 43 of one of the standing walls 42a, thereby engaging the engaging projection 33c on the head 33 side. The other side of the airbag 20 is engaged and fixed in the joint recess 42a-2 and sandwiched between the end surface of the head 33 which is the other end side of the inflator 30 and the inner wall surface of the other standing wall 42b. The degree of adhesion to the standing wall 42b is increased, and gas leakage at this portion can be more reliably blocked.

  In order to form the engaging recess 42b-1 on the other upright wall 42b, when it is formed by drawing with a press, the escape hole 42b exists in the substantially central portion of the engaging recess 42b-1. If -2 is formed, the thickness of the other upright wall 42b can be prevented from being partially reduced.

  8 and 9 show a fourth embodiment according to the present invention as a modified example of the insertion hole 25 provided in the one opposing wall 23 of the inflator mounting portion 22 in the airbag 20.

According to FIGS. 8 and 9, when the insertion hole 25 is provided in one opposing wall 23, four contact points formed by cutting out substantially X-shaped notches in predetermined portions of the one opposing wall 23. form pieces 23a, the contact piece 23a is upon inserting the body trunk portion 32 of the inflator 30, by being bent on the inner side, so that the insertion hole 25 is formed.

  At this time, the contact piece 23a is eventually formed at the peripheral portion of the insertion hole 25, and is brought into contact with the outer peripheral wall of the main body barrel portion 32 of the inflator 30, so that the inside of the bag due to the inflation gas from the inflator 30 Since the pressure is received in a large area, the degree of close contact with the inner wall surface of one upright wall 42a at the peripheral edge portion of the insertion hole 25 in the inflator mounting portion 23 of the airbag 20 is further increased, and gas leakage at this portion Can be cut off more reliably.

Incidentally, the connecting portion between the contact piece 23a at one of the opposing walls 2 3 of the inflator mounting portion 22 be formed small circular hole 23b, tear stop the contact piece 23a is applied.

  10 and 11 show another embodiment of the airbag 20 constituting the airbag apparatus according to the present invention.

  That is, the airbag 20 shown in FIG. 10 is an example of a case where the airbag 20 is installed in a cowl top 51 of an automobile 50 and used for a pedestrian protection airbag device, and the inflated and deployed shapes are on the engine hood 52 and the wind glass 53. It is configured to expand and deploy in the above two directions.

  Further, the airbag 20 shown in FIG. 11 is an example of a trial use in a passenger seat airbag device, and the inflated and deployed shape is divided into two in the longitudinal direction on the passenger compartment side so as to be inflated and deployed. 60 heads can be captured so as to be wrapped from both sides.

  As described above, the present invention eliminates the conventional retainer by disposing the inflator inside the airbag, and uses the in-bag pressure of the airbag to connect the inflator and the attachment portion of the airbag. Since it is configured to be in close contact with each other, it can be said that it is suitable for an airbag device configured by housing a folded airbag and a rod-shaped inflator for inflating and deploying the airbag in a case body.

1 is a perspective view of an airbag device employing a first embodiment according to the present invention. It is an exploded perspective view similarly. It is a longitudinal cross-sectional view of the airbag apparatus drawn in FIG. It is a perspective view of the inner bracket used when attaching an inflator to a case body. It is a principal part expanded sectional view in FIG. FIG. 6 is an enlarged cross-sectional view of a main part similar to FIG. 5 in an airbag device adopting a second embodiment according to the present invention. FIG. 6 is an enlarged cross-sectional view of a main part similar to FIG. 5 in an airbag device adopting a third embodiment according to the present invention. It is a principal part perspective view of the airbag used for the airbag apparatus which employ | adopted the 4th Example which concerns on this invention. FIG. 9 is a perspective view partially depicting the interior of the airbag in which the relationship between the airbag and the inflator in FIG. 8 is depicted. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view depicting an inflated and deployed state of an airbag when an airbag device employing an embodiment according to the present invention is used as a pedestrian protection airbag device. It is the perspective view which drawn the expansion | deployment deployment state of the airbag at the time of using the airbag apparatus which employ | adopted the Example which concerns on this invention as an airbag apparatus for passenger seats.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Airbag apparatus 20 Airbag 21 Bag main-body part 22 Inflator attachment part 23 One opposing wall 23a Contact piece 24 The other opposing wall 25 Insertion hole 25a Peripheral part 30 Inflator 32 Main body trunk | drum 32b Male screw part 33 Head 40 Case body 41 Bag housing body portion 42 Inflator housing portion 42a One standing wall 42b The other standing wall 42a-2 Female thread portion 43 Mounting hole

Claims (4)

An airbag device comprising a folded airbag, a rod-like inflator for inflating and deploying the airbag, and a case body for housing the airbag, wherein the case body includes the airbag. A bag housing main body portion to be housed, and an inflator housing portion integrally formed so as to protrude in a state of communicating with the bag housing main body portion so as to house the inflator, the inflator housing portion comprising: The inflator mounting portion is formed on the airbag, and the inflator is disposed on one of the pair of standing walls in the inflator mounting portion facing one of the standing walls. An insertion hole for inserting one end side of the inflator accommodated including the gas ejection port in the accommodation portion is formed, and the one standing wall is provided with the insertion hole. The provided Tsukeana and, spliced in a state in which the inflator is inserted through into the insertion hole and the mounting hole, inside of the case body over the outer peripheral wall of the inflator the periphery of the insertion hole from the periphery of the attachment hole And the other end of the inflator is pressed against the inner wall surface of the other upright wall together with the other facing wall facing the other upstanding wall in the inflator accommodating portion. An airbag device mounted on a housing portion.
  Bolts are planted on the other end side of the inflator, the bolts are installed on the other standing wall so as to project outward from the other standing wall, and project from the other standing wall of the bolt. A nut is screwed into the part and the bolt is attached to the other upright wall so that the other end of the inflator is pressed against the inner wall surface of the other upright wall. Item 2. The airbag device according to Item 1.   A male screw portion is formed on one end side of the inflator, and a female screw portion to which the male screw portion is screwed is formed on an inner wall of a mounting hole provided in the one upright wall portion, and the male screw portion is screwed to the female screw portion. The airbag device according to claim 1, wherein the airbag device is configured to press the other end side of the inflator against an inner wall surface of the other upright wall. When a contact piece is formed on a peripheral edge portion of the insertion hole provided in the airbag, and the inflator is installed on the one standing wall through the insertion hole provided in the airbag. The airbag device according to any one of claims 1 to 3, wherein the airbag device is configured to be attached to an outer peripheral wall of the inflator.

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