JP5312474B2 - Side airbag device and method for manufacturing side airbag device - Google Patents

Description

  The present invention relates to a side airbag device having a side airbag installed in a vehicle and accommodated in a side airbag cover in a folded state, and a method for manufacturing the side airbag device.

  A side airbag (for example, Patent Document 1) embedded in an occupant's seat has been proposed as a device for protecting an occupant when a vehicle encounters a side collision or rollover. Such a side airbag is inflated and deployed on the front side of the vehicle along the side wall of the passenger compartment, and is interposed between the side door and the occupant to prevent damage to the occupant.

  A side airbag that is inflated and deployed along the side wall of the passenger compartment is accommodated in a side airbag cover in a folded state, supplied with gas by a cylinder-type inflator, and inflated and deployed.

  Patent Document 1 discloses a side airbag that is folded into a spiral shape (roll shape) and accommodated in a case.

JP-A-8-142790

  In order to increase the safety of passengers, the side airbag is required to be inflated and deployed quickly when a side collision or the like occurs. The time required for the side airbag to fully inflate and deploy is several milliseconds. The side airbag passes through the occupant's waist (hip point) from the time when the inflator is activated and gas supply is started as an index for evaluating the speed of inflation and deployment of the side airbag, that is, the high level of passenger protection performance. Time (hereinafter referred to as “lumbar passage time”). The shorter the waist passage time, the higher the occupant protection performance of the side airbag.

  The waist passage time varies depending on the folding method of the side airbag. In Patent Document 1, the side airbag is folded in a spiral shape for quick deployment, but there is room for further improvement from the viewpoint of quick deployment and space saving during storage.

  In view of such a problem, an object of the present invention is to provide a side airbag device and a side airbag device manufacturing method that can be inflated and deployed in a shorter time.

  A typical configuration of the side airbag device according to the present invention for solving the above-described problems includes an inflator for supplying airbag inflation and deployment gas to the side airbag, and a gas supplied from the inflator to the front side of the vehicle. A side airbag that is inflated and deployed, and a side airbag cover that accommodates the inflator and the side airbag before being inflated and deployed. The side airbag is disposed from the front of the vehicle to the rear of the vehicle before being accommodated in the side airbag cover. It is in a state consisting of a roll part folded in a roll shape toward the roll and a non-roll part between the roll part and the inflator, and the non-roll part has a shape that becomes gradually wider toward the lower side. And

  According to said structure, a side airbag has a wide non-roll part in the downward side of an inflator. This non-roll portion develops preferentially and quickly pushes out the lower portion of the roll portion. As a result, the side airbag cover is cleaved from the side biased downward from the center.

  Thus, in the present invention, by devising the folding method of the side airbag, a non-roll portion that is preferentially deployed is provided, and this pushes out the lower portion of the roll portion, so that the tearing force is exerted below the side airbag cover. Concentrate. Accordingly, the side airbag can be inflated and deployed more quickly than when the uniform force is applied to the entire side airbag cover, and the waist passage time can be shortened.

  Said side airbag is good to be accommodated in a side airbag cover in a state where the roll portion is folded in two and is adjacent to the vehicle front side of the inflator together with the non-roll portion.

  According to said structure, the roll part of a side airbag is folded in roll shape wide. The roll portion is folded in two narrowly only immediately before being accommodated in the side airbag cover. This is because it can be considered that there is an effect of reducing the resistance when the roll part is expanded and deployed by folding the majority of the roll part wide.

  Said side airbag apparatus is good to be accommodated in a side airbag cover in order of the roll part folded in half, the non-roll part folded in half, and the inflator from the vehicle front. This is because the roll part can be strongly pushed out by the force when the non-roll part folded in half is developed.

  Another representative configuration of the side airbag device according to the present invention for solving the above-described problems is an inflator that supplies a gas for inflating and deploying an airbag to the side airbag, and a vehicle front side that is supplied with the gas from the inflator. A side airbag that inflates and deploys to the vehicle, and a side airbag cover that accommodates the inflator and the side airbag before inflating and deploying, before the side airbag is accommodated in the side airbag cover. The bellows portion is folded in a bellows shape toward the rear and a non-bellows portion between the bellows portion and the inflator, and the non-bellows portion has a shape that gradually becomes wider toward the bottom. Features.

  Even with the above configuration, the non-bellows portion is preferentially deployed, and this pushes out the lower portion of the bellows portion, thereby concentrating the tearing force below the side airbag cover and quickly expanding and deploying the side airbag. Can reduce the waist passage time.

  Said side airbag apparatus is good to be accommodated in a side airbag cover in order of a bellows part, a folded non-bellows part, and an inflator from the vehicle front. This is because the bellows part can be strongly pushed out by the force when the non-bellows part folded in two is developed.

  Before the side airbag is accommodated in the side airbag cover, a portion overlapped on the outer side of the inflator may be folded forward. This is because space can be saved by reducing the thickness of the inflator portion, and rapid expansion and deployment can be performed.

  A typical configuration of a method for manufacturing a side airbag device according to the present invention for solving the above-described problems is that a gas is supplied from an inflator that supplies a gas for inflating and deploying an airbag to the side airbag and inflated and deployed to the front side of the vehicle. The upper and lower side airbags are folded up and down to form a fold that descends toward the rear of the vehicle, and the side airbag formed with the descending fold is rolled from the front of the vehicle toward the rear of the vehicle. A roll folding step of forming a non-roll portion having a shape that gradually becomes wider between the roll portion folded in a roll shape and the inflator, and the roll portion together with the non-roll portion. A housing step of housing in the side airbag cover in a state adjacent to the front side. And features.

  In the above housing step, the roll portion may be folded in half.

  In the above-described housing step, the non-roll portion is further folded in half, and from the front side of the vehicle, the roll portion folded in half, the non-roll portion folded in half, and the inflator are housed in the side airbag cover in this order.

  Another typical configuration of the method for manufacturing the side airbag device according to the present invention for solving the above-described problem is that the gas is supplied from an inflator that supplies the airbag inflation and deployment gas to the side airbag, and the vehicle is moved forward. An up-and-down folding process for folding up and down the inflated side airbag so as to form a fold that descends toward the rear of the vehicle, and a bellows from the front of the vehicle toward the rear of the vehicle. A bellows folding step for forming a non-bellows portion having a shape that gradually becomes wider between the bellows portion and the inflator folded in a bellows shape, and the inflator together with the non-bellows portion. A housing step of housing the side airbag cover in a state adjacent to the vehicle front side of the vehicle. .

  In the above-described housing step, the non-bellows portion may be folded in half, and the side airbag cover may be housed from the front of the vehicle in the order of the bellows portion, the folded non-bellows portion, and the inflator.

  The above-described side airbag device manufacturing method may further include a folding step of folding back a portion overlapped on the outside of the inflator before being accommodated in the side airbag cover.

  The component corresponding to the technical idea in the side airbag apparatus mentioned above and its description are applicable also to the said side airbag apparatus manufacturing method.

  According to the present invention, the deployment time of the side airbag device is shortened, and the safety of the vehicle occupant is improved.

It is a figure which illustrates the vehicle interior in which the side airbag apparatus which is the 1st-3rd embodiment of this invention is applied. It is an assembly drawing of the side airbag apparatus of FIG. FIG. 3 is an assembly view of the side airbag device of FIG. 2 as viewed from the front of the vehicle. It is a figure which illustrates the side airbag apparatus which is the 1st Embodiment of this invention. It is a figure which illustrates the side airbag apparatus which is the 2nd Embodiment of this invention. It is a figure which illustrates the side airbag apparatus which is the 3rd Embodiment of this invention. It is a figure which shows the comparative example 1 compared with each embodiment of this invention. It is a figure which shows the comparative example 2 compared with each embodiment of this invention. It is a figure which illustrates the state which the side airbag apparatus of FIG. 1 expanded and deployed.

DESCRIPTION OF SYMBOLS 100, 200, 300, 400 ... Side airbag apparatus 110 ... Vehicle 120 ... Passenger seat 122 ... Driver's seat 130 ... Side door 140 ... Side airbag 150 ... Gas ejection hole 160 of cylinder type inflator ... Cylinder type inflator 170 ... Side air Bag cover 172 ... Harness wire 180 ... Diffuser 190 ... Gas jet hole 210 of diffuser ... Crease 220 ... Roll part 230 ... Non-roll part 420 ... Bellows part 430 ... Non-bellows part 500 ... Crew 520 ... Waist

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Arrangement of side airbag device in vehicle compartment)
FIG. 1 is a diagram illustrating a vehicle interior to which a side airbag device according to first to third embodiments of the present invention is applied. The side airbag device 100 includes a side airbag 140 (described later) that is provided on the vehicle outer side of a seat (passenger seat 120) in the vehicle 110 and is inflated and deployed between the passenger seat 120 and the side door 130. . The configuration on the driver seat 122 side is the same.

(Configuration of Side Airbag Device 100)
2 is an assembly view of the side airbag device 100 of FIG. 1, and FIG. 3 is an assembly view of the side airbag device 100 of FIG. As illustrated in FIG. 2, the side airbag device 100 has a gas ejection hole 150 in the vicinity of the lower end, and a cylinder type inflator 160 that supplies a gas for inflating and deploying an airbag to the side airbag 140, and a cylinder type A side airbag 140 that is supplied with gas from the inflator 160 and is inflated and deployed on the front side of the vehicle (front side in FIG. 3), and a side airbag cover 170 that accommodates the cylinder-type inflator 160 and the side airbag 140 before the inflation and deployment. .

  Although the cylinder type inflator 160 is used in the present embodiment, the shape of the inflator is not limited, and any shape may be used. Although the position of the gas ejection hole 150 is also provided in the vicinity of the lower end of the cylinder-type inflator 160 in the present embodiment, it is not necessarily provided at this position.

  In addition, the side airbag device 100 includes a harness wire 172 that gives a drive signal to the cylinder-type inflator 160 and a diffuser 180 that diffuses the gas supplied from the cylinder-type inflator 160. In FIG. 3, the cylinder type inflator is hidden inside the diffuser 180 and is not visible.

  Hereinafter, although the structure of the side airbag apparatus concerning each embodiment of this invention is the same as that of said side airbag apparatus 100, since the folding methods of a side airbag differ, respectively, the side airbag concerning each embodiment is different. Bag devices are indicated by different symbols.

(First embodiment)
FIG. 4 is a diagram illustrating the side airbag device 200 according to the first embodiment of the present invention, and illustrates a method for folding the side airbag 140. The side airbag 140 before inflating and deploying shown in FIG. 4A is folded as follows. First, the upper and lower sides of a side airbag 140 that is supplied with gas from a cylinder-type inflator 160 (inside the diffuser 180) having a gas ejection hole 150 (inside the gas ejection hole 190 of the diffuser 180) and inflated and deployed on the vehicle front side are It folds so that the crease | fold 210 which descend | falls toward back may be formed (FIG. 4 (a)-(b)).

  Before the side airbag 200 is accommodated in the side airbag cover 170, the side airbag 200 includes a folding step of folding forward the portion overlapped outside the cylinder-type inflator 160 (in the diffuser 180) (FIGS. 4B to 4B). c)). This is because space can be saved by reducing the thickness of the inflator portion, and rapid expansion and deployment can be performed.

  Next, the lower end portion of the side airbag 140 in which the descending fold line 210 is formed is bent in a bellows shape to adjust the shape of the lower end portion (FIGS. 4 (c) to (d)). It folds in a roll shape toward the rear (FIGS. 4D to 4E). As a result, a non-roll portion 230 having a shape that becomes gradually wider downward is formed between the roll portion 220 folded into a roll shape and the cylinder-type inflator 160 (in the diffuser 180) (FIG. 4 (e)). )).

  Next, the non-roll portion 230 is placed under the roll portion 220 and placed on the side airbag cover 170 (FIG. 4F). Since the roll folding width is substantially equal to the width of the side airbag cover 170, the roll folding width cannot be put in the empty space of the side airbag cover 170 already containing the diffuser 180. Therefore, the roll part 220 is folded in half. The non-roll portion 230 is also folded in half. Thus, the roll part 220 and the non-roll part 230, which are folded in two, are accommodated in the side airbag cover 170 in a state where the roll part 220 and the non-roll part 230 are adjacent to the front side of the cylinder-type inflator 160 (in the diffuser 180) ( FIG.4 (f)-(g)).

  Therefore, as illustrated in the BB cross-sectional view of FIG. 4G, finally, from the front side of the vehicle, the roll part 220 is folded in half, and the non-roll part 230 is folded in half in a substantially U-shaped cross section. And the inflator 160 are accommodated in the side airbag cover 170 in this order. In this way, the non-roll portion 230 of the roll portion 220 and the non-roll portion 230 arranged in a straight line can expand and push out the roll portion 220.

  The features of this embodiment are as follows. As illustrated in FIG. 4 (e), particularly AA sectional view, the side airbag 140 is folded in a roll shape from the front of the vehicle to the rear of the vehicle before being accommodated in the side airbag cover 170. The roll portion 220 and the non-roll portion 230 between the roll portion 220 and the cylinder type inflator 160 are brought into a state. And the non-roll part 230 has a shape which becomes gradually wide as it goes below.

  According to the above configuration, in the process of inflating and deploying, the side airbag 140 aims at the above-described state, that is, the state of FIG. 4 (e) including the roll portion 220 and the non-roll portion 230. The side airbag 140 has a wide non-roll portion 230 on the same side (lower side) as the gas ejection hole 150 (inside the gas ejection hole 190 of the diffuser 180) of the cylinder-type inflator 160 (in the diffuser 180). The non-roll portion 230 is preferentially deployed and pushes the roll portion 220 out of the side airbag cover 170. As a result, the side airbag cover 170 is cleaved from the lower side from the center.

  Thus, in the present embodiment, by devising the folding method of the side airbag 140, the non-roll portion 230 that is preferentially deployed is provided, and this pushes out the lower portion of the roll portion 220, thereby lowering the side airbag cover 170. Concentrate the cleavage force on. As a result, the side airbag 140 can be inflated and deployed more quickly than when a uniform force is applied to the entire side airbag cover 170, and the waist passage time can be shortened.

  As described above, the non-roll portion 230 may have any shape as long as it has a shape that gradually becomes wider as it goes downward. For example, as in this embodiment, it may be a substantially triangular shape or a substantially trapezoidal shape that is wide on the vehicle lower side.

(Folding when storing the side airbag)
As illustrated in FIG. 4G, the side airbag 140 is formed by folding the roll portion 220 in two and adjoining the front side of the cylinder-type inflator with the non-roll portion 230 folded in half in a substantially U-shaped cross section. In this state, it is housed in the side airbag cover 170.

  According to the above configuration, the side airbag 140 is folded in a wide roll shape at the roll portion 220 and is folded in two narrowly only immediately before being accommodated in the side airbag cover 170. This is because in the case of folding in a roll shape, it is considered that there is an effect of reducing the resistance at the time of inflating and unfolding by folding a large part of the roll portion 220 in this way.

  As illustrated in the BB cross-sectional view of FIG. 4 (g), the folds of the folded-up roll portion 220 can be accommodated in a small accommodation space, and in order to shorten the deployment time, Is directed.

(Second Embodiment)
FIG. 5 is a diagram illustrating a side airbag device 300 according to the second embodiment of the present invention. In the first embodiment, the order of folding (FIG. 4 (b)) → bellows folding (FIG. 4 (c)) → roll folding (FIG. 4 (d)) is the order. In this embodiment, bellows folding ( 5 (b)) → roll folding (FIG. 5 (c)) → folding (FIG. 5 (d)).

  The CC sectional view and the DD sectional view in FIGS. 5E and 5G are the same as the AA sectional view and the BB sectional view in FIGS. Also in this embodiment, finally, from the front side of the vehicle, the side airbag cover 170 is folded in the order of the roll part 220 folded in half, the non-roll part 230 folded in half in a substantially U-shaped cross section, and the inflator 160. Will be housed.

  Of the roll part 220 and the non-roll part 230 arranged in a straight line, the non-roll part 230 can expand to push out the roll part 220. Moreover, the roll part 220 can be strongly pushed out with the force when the non-roll part 230 folded in two is developed.

  In this way, the non-roll portion 230 that preferentially deploys is provided, and this pushes out the lower portion of the roll portion 220, thereby concentrating the tearing force below the side airbag cover 170. Thereby, also in this embodiment, cleavage occurs more quickly than when an equal force is applied to the entire side airbag cover 170.

(Third embodiment)
FIG. 6 is a diagram illustrating a side airbag device 400 according to the third embodiment of the present invention. This embodiment is different from the second embodiment in that the side airbag 140 formed with the descending fold 210 is folded in a bellows shape instead of roll-folding from the front of the vehicle toward the rear of the vehicle. (FIGS. 6C to 6D).

  As a result, a non-bellows portion 430 having a shape that gradually increases in the downward direction is formed between the bellows portion 420 folded into a bellows shape and the cylinder-type inflator 160 (in the diffuser 180) (FIG. 6E). )).

  It has been empirically known that when folding in a bellows shape, the folding is performed smoothly without changing the folding width, unlike the case of folding in a roll shape. Therefore, in this embodiment, the folding width of the bellows is smaller than the folding width of the roll folding in the first and second embodiments (the width of the bellows portion 420 <the width of the roll portion 220).

  Also in this embodiment, immediately before the bellows portion 420 is accommodated in the side airbag cover 170, a folding step is performed to fold back the portion overlapped outside the cylinder-type inflator 160 (inside the diffuser 180) (FIG. 6D). ) To (e)). This is to reduce the thickness of the inflator portion to save space and to perform rapid expansion and deployment.

  Finally, the bellows portion 420 is accommodated in the side airbag cover 170 in a state of being adjacent to the front side of the cylinder-type inflator 160 (in the diffuser 180) together with the non-bellows portion 430 (FIG. 6 (f)). As illustrated in the FF cross section of FIG. 6 (f), the bellows portion 420 is not folded in half as in the first and second embodiments. On the other hand, the non-accordion portion 430 is folded in half into a substantially U-shaped cross section, as in the first and second embodiments. Therefore, when accommodated in the side airbag cover 170, the non-bellows portion 430 also has a form as if it is a part of the bellows portion 420.

  The features of this embodiment are as follows. That is, in the side airbag device 400 according to the present embodiment, the side airbag 140 includes a bellows portion 420 that is folded in a bellows shape from the front of the vehicle toward the rear of the vehicle before being housed in the side airbag cover 170. Then, a state is formed of the bellows portion 420 and the non-bellows portion 430 between the cylinder type inflator 160 (in the diffuser 180) (FIG. 6E). The non-bellows portion 430 has a shape that becomes gradually wider toward the lower side.

  Also with the above configuration, the formed non-accordion portion 430 can be expanded and deployed more quickly, and the waist passage time can be shortened.

  As illustrated in the FF cross-sectional view of FIG. 6F, the folds of the bellows are directed in the inside and outside of the vehicle. This is because it can be accommodated in a small accommodating space and the deployment time is shortened.

  In the present embodiment, finally, from the front of the vehicle, the bellows portion 420, the non-belly bellows portion 430 folded in half in a substantially U-shaped cross section, and the inflator 160 are housed in the side airbag cover 170 in this order. It becomes.

  Of the bellows portion 420 and the non-bellows portion 430 arranged in a straight line, the non-bellows portion 230 can expand to push out the bellows portion 420. Further, the bellows portion 420 can be strongly pushed out by the force when the non-bellowed portion 430 folded in half is unfolded.

  As described above, the non-bellows portion 430 that is preferentially deployed is provided, and this pushes out the lower portion of the bellows portion 420, thereby concentrating the tearing force below the side airbag cover 170 in this embodiment. As a result, the side airbag cover 170 is cleaved more quickly than when an equal force is applied.

(Comparative Example 1)
FIG. 7 is a diagram showing a comparative example 1 to be compared with each embodiment of the present invention. In Comparative Example 1, the upper and lower sides of the side airbag 140 are tucked in, that is, folded inside the side airbag 140 itself according to the baffle 50 that is a partition provided inside the side airbag 140 (FIG. 7A). To (b)). Thus, a fold line 52 that rises toward the rear of the vehicle is formed. Thereafter, it is folded in a roll shape toward the rear of the vehicle (FIG. 7C), the direction of the roll portion 54 is changed (FIG. 7D), the roll portion 54 is folded in two, and the side airbag cover 170 is folded. (FIG. 7E).

  In the case of the comparative example 1, unlike the first to third embodiments of the present invention, the side (lower side) of the cylinder-type inflator 160 (inside the diffuser 180) where the gas ejection holes 150 (inside the gas ejection holes 190 of the diffuser 180) are present. Side) does not have a preferentially deploying part. On the contrary, it has a wide configuration on the side (upper side) where there is no gas ejection hole 150 (FIG. 7C). Since there is no preferentially deploying portion on the side where gas is first supplied, it takes time to deploy the side airbag 140 as compared to the first to third embodiments of the present invention.

(Comparative Example 2)
FIG. 8 is a diagram showing a comparative example 2 to be compared with each embodiment of the present invention. As illustrated in FIG. 8B, in the comparative example 2, the upper part of the side airbag 140 is folded while the lower part is folded into a bellows fold (FIGS. 8A to 8B). A substantially horizontal fold 56 is formed. After that, it is folded in a roll shape toward the rear of the vehicle (FIGS. 8B to 8C), and the roll portion 58 is folded in half and accommodated in the side airbag cover 170 (FIG. 8D).

  In the case of the comparative example 2, since the crease 56 is substantially horizontal, a wide shape in which gas is easily supplied like the non-roll portion 230 and the non-bellow portion 430 of the first to third embodiments of the present invention. Is not formed in any of the vertical directions. Therefore, since an equal force is applied to the entire side airbag cover 170, the side airbag 140 is compared with the first to third embodiments of the present invention in which the tearing force is concentrated below the side airbag cover 170. It still takes time to deploy.

(Lumbar passage time)
FIG. 9 is a view illustrating a state in which the side airbag device 100 of FIG. 1 has the same configuration as the first to third embodiments and is inflated and deployed. When the time required for the side airbag 140 to pass through the waist (hip point) 520 of the occupant 500 seated on the passenger seat 120 was compared, the following results were obtained.
First embodiment: 6.4 milliseconds Second embodiment: 6.6 milliseconds Third embodiment: 6.4 milliseconds Comparative example 1: 7.0 milliseconds

Comparative Example 2: 8.2 milliseconds As described above, the passage time of the waist 520 is shorter in each embodiment of the present invention than in each comparative example. Thereby, the superiority of the embodiment of the present invention is recognized.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented by various methods. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  INDUSTRIAL APPLICABILITY The present invention can be used in a side airbag device having a side airbag that is installed in a vehicle and accommodated in a side airbag cover in a folded state, and a method for manufacturing the side airbag device.

Claims (10)

An inflator for supplying a gas for inflating and deploying the airbag to the side airbag;
A side airbag that is supplied with gas from the inflator and is inflated and deployed on the vehicle front side; and
A side airbag cover for accommodating the inflator and the side airbag before inflating and deploying;
With
Before the side airbag is accommodated in the side airbag cover, a portion of the inflator that is overlapped on the outside is folded forward and further rolled in a roll shape from the front of the vehicle toward the rear of the vehicle. A portion and a non-roll portion between the roll portion and the inflator,
The non-roll portion has a shape that gradually becomes wider toward the lower side, wherein the side airbag device is characterized.   The said side airbag is accommodated in the said side airbag cover in the state which folded the said roll part in two and was made to adjoin the vehicle front side of the said inflator with the said non-roll part. The side airbag device as described.   3. The side air according to claim 2, wherein the side airbag is housed in the side airbag cover in the order of the two-folded roll portion, the two-folded non-roll portion, and the inflator from the front of the vehicle. Bag device. An inflator for supplying a gas for inflating and deploying the airbag to the side airbag;
A side airbag that is supplied with gas from the inflator and is inflated and deployed on the vehicle front side; and
A side airbag cover for accommodating the inflator and the side airbag before inflating and deploying;
With
Before the side airbag is accommodated in the side airbag cover, the portion overlapped on the outside of the inflator is folded forward, and is further folded in a bellows shape from the front of the vehicle toward the rear of the vehicle. A portion, and a non-accordion portion between the bellows portion and the inflator,
The side airbag device according to claim 1, wherein the non-bellows portion has a shape that gradually becomes wider toward a lower side.   5. The side airbag device according to claim 4, wherein the side airbag device is housed in the side airbag cover in the order of the bellows portion, the folded non-bellows portion, and the inflator from the front of the vehicle. The upper and lower sides of the side airbag that is supplied with gas from the inflator that supplies the airbag inflating and deploying gas to the side airbag and inflates and deploys to the front side of the vehicle are folded so that a crease that descends toward the rear of the vehicle is formed. Folding process,
A folding step of folding back the portion of the side airbag that is overlapped on the outside of the inflator,
The side airbag formed with the descending fold is folded in a roll shape from the front of the vehicle to the rear of the vehicle, and gradually becomes wider between the roll portion folded in the roll shape and the inflator as it goes downward. A roll folding step for forming a non-roll portion having a shape;
A housing step of housing the roll portion in a side airbag cover in a state of being adjacent to the vehicle front side of the inflator together with the non-roll portion;
A method for manufacturing a side airbag device, comprising: The side airbag device manufacturing method according to claim 6 , wherein in the housing step, the roll portion is folded in half. Further, in the housing step, the non-roll portion is folded in half, and is housed in the side airbag cover from the front of the vehicle in the order of the half-folded roll portion, the half-folded non-roll portion, and the inflator. The method for manufacturing a side airbag device according to claim 7 . The upper and lower sides of the side airbag that is supplied with gas from the inflator that supplies the airbag inflating and deploying gas to the side airbag and inflates and deploys to the front side of the vehicle are folded so that a crease that descends toward the rear of the vehicle is formed. Folding process,
A folding step of folding back the portion of the side airbag that is overlapped on the outside of the inflator,
The side airbag formed with the descending fold is folded in a bellows shape from the front of the vehicle toward the rear of the vehicle, and gradually becomes wider between the bellows portion folded in the bellows shape and the inflator. A bellows folding process for forming a non-bellows portion having a shape;
A housing step of housing the bellows portion in a side airbag cover in a state of being adjacent to the vehicle front side of the inflator together with the non-bellows portion,
A method for manufacturing a side airbag device, comprising: In the housing step, the non-bellows portion is folded in half, and the bellows portion, the folded non-bellows portion, and the inflator are housed in the side airbag cover in this order from the front of the vehicle. The method for manufacturing a side airbag device according to claim 9 .

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