JP6835313B2 - Gas generator and how to assemble the gas generator - Google Patents

Description

The present invention relates to a gas generator that burns a gas generator by operating an igniter to generate combustion gas, and a method for assembling the gas generator.

In a gas generator that generates combustion gas by burning a gas generator, in order to achieve the desired gas generation performance (output performance), the gas generator filled in the gas generator is in a dry state as expected. It is required to fit. Therefore, conventionally, a moisture-proof member such as an O-ring or a gasket is used for moisture-proofing the gas generator arranged in the gas generator. For example, in the gas generator shown in Patent Document 1, the housing of the gas generator is composed of an outer cylinder having both ends open, and a closing member and a lid member covering both open ends of the outer cylinder. In the gas generator, the airtightness inside the housing filled with the gas generator is maintained by fitting the closing member and the lid member into both openings of the outer cylinder via a seal ring such as an O-ring. Be done.

In addition, as another method for preventing moisture from the gas generator, a technique for applying a sealant to the housing of the gas generator is adopted. For example, Patent Document 2 discloses a technique of enclosing a gas generating agent in a container to make the container airtight. In this technique, the gas generating agent pack is made of an aluminum alloy with the cups and caps that make it up. Then, a sealing agent for winding is applied to the outer peripheral portion of the cup of the cap, and the sealing agent for winding is cured to form a packing, and the airtightness of the container is improved by the double winding molding portion.

Japanese Unexamined Patent Publication No. 11-778766 Japanese Unexamined Patent Publication No. 3-128744 Japanese Unexamined Patent Publication No. 10-35402 Japanese Patent No. 4587550

In the conventional moisture-proof technology, a member different from the housing of the gas generator for moisture-proofing, for example, a moisture-proof member such as the O-ring, a gasket, and a sealant for coating is interposed in the housing of the gas generator. , The gas generator filled in the housing is moisture-proof. In general, such a moisture-proof member is incorporated into the housing in a state of being elastically deformed at the time of assembling the gas generator, so that the airtight state inside the member can be maintained. However, the performance of such a moisture-proof member gradually deteriorates with the aging, and it is not practically easy to maintain the airtight state at the molecular level, and the airtightness inside the gas generator decreases with the passage of time. There is a possibility of going.

Further, in the conventional moisture-proof technology, since the above-mentioned moisture-proof member different from the housing is used, the load of quality control of the moisture-proof member increases, and the gas generator assembly process depends on the shape and number of the moisture-proof member to be used. There is a risk that the number of steps will increase, resulting in an increase in the assembly load.

In view of the above problems, it is an object of the present invention to provide a technique for preferably moisture-proofing a gas generator arranged in a gas generator while suppressing an assembly load of the gas generator.

In order to solve the above problems, in the present invention, the region filled with the gas generating agent inside the housing is in a predetermined airtight state with respect to the outside, and is in a state of higher pressure than the outside. A structure for defining a pressure region in the housing was adopted. With such a configuration, it is possible to prevent outside air including moisture from entering the region filled with the gas generating agent while using the conventional sealing means without requiring a member separate from the housing. It can be effectively suppressed.

Specifically, the present invention relates to an igniter, a housing for accommodating the igniter, a housing having an outlet for connecting the inside and the outside of the housing, and a filling chamber filled with a solid gas generator. The gas generator is provided with a filling chamber in the housing for arranging the gas generator at a position where the filled gas generator can be burned by the operation of the igniter. Then, the gas generator is surrounded by a plurality of region defining members, so that at least in a predetermined region in the housing including the filling chamber, a predetermined airtight state with respect to the outside of the predetermined region is formed. Further, a pressurized region in which a high pressure state higher than the external pressure of the predetermined region is formed is further provided. Then, the plurality of region defining members are provided with a seal member that maintains the predetermined airtight state before the operation of the igniter and is cleaved by the combustion gas from the gas generating agent generated by the operation of the igniter. A predetermined region-defining member that is included and included in the plurality of region-defining members is not joined by welding and is arranged between the region-defining members in a state where an external force is applied. It is joined via the intervening member of.

In the gas generator according to the present invention, a configuration in which the filling chamber in the housing is filled with the gas generating agent is adopted. The gas generating agent filled in the filling chamber may be directly burned by the combustion product generated by the operation of the igniter, or through combustion of a combustion agent or the like different from the filled gas generating agent. May be burned. The igniter of the present invention may be configured to include the igniter main body and the igniter collar, or may be only the igniter main body. Then, in order to protect the gas generating agent filled in the filling chamber in such a housing from moisture from the outside, the pressurized region is formed so that a predetermined airtight state is formed in a predetermined region including the filling chamber. Is formed. Here, the pressurized region is a region (space) defined by being surrounded by a plurality of region defining members, but the region defining members are joined by welding at at least one joining portion. However, a joining form in which the above-mentioned predetermined intervening member is interposed is adopted. In the joining form using a predetermined intervening member in this way, it is possible to enjoy advantages such as a small assembly load required for joining as in welding and avoidance of the influence of heat generation due to welding, while the area defining members are separated from each other. There is still the possibility of gas communicating at the molecular level, and it is expected that the degree of airtightness will be smaller than that of the welded joint form. Based on this point, a predetermined airtight state is formed in the pressurized region formed by adopting the joint form in which the predetermined intervening member is interposed. The predetermined airtight state is the degree of airtightness to the outside of the predetermined region, which is formed at the time of manufacturing the gas generator and is suitable for moisture-proofing the filled gas generator. In other words, the airtight state in a predetermined region where the gas generator can be protected from external moisture is defined as described above so that the combustion characteristics of the gas generator required for the gas generator during manufacturing are ensured. It is considered to be airtight.

The pressurized region is further pressurized so as to be in a high pressure state higher than the external pressure thereof. As a result, it is possible to effectively prevent outside air from entering the inside of the pressurized region with moisture due to the pressure difference between the inside and the outside of the pressurized region. Further, since the gas generating agent is placed in a high pressure atmosphere due to the formation of the pressurized region, its ignition and combustion speed can be increased, and the combustion start characteristic of the gas generating agent can be made advantageous. .. The high pressure state of the pressurized region may be formed by encapsulating a predetermined inert gas such as argon or helium. Since such an inert gas does not affect the combustion of the gas generating agent in the filling chamber contained in the pressurized region, the unexpected combustion of the gas generating agent due to the high pressure state is sufficiently suppressed. In addition, nitrogen and the like are relatively unlikely to affect the combustion of the gas generating agent, and therefore can be suitably used for forming a high pressure state. Regarding the inert gas for forming the high pressure state in the pressurized region, the amount of the inert gas is sufficiently larger than the combustion gas generated from the gas generating agent to the extent necessary for moisture proofing in the pressurized region. It may be less.

Then, in the pressurized region, a seal member corresponding to one of the region defining members maintains a predetermined airtight state to the outside before the igniter is operated, that is, until the gas generating agent is burned. To. Further, the seal member is configured to be cleaved by the combustion gas generated by the operation of the igniter and the combustion of the gas generating agent. Therefore, the predetermined airtight state maintained by the seal member until the operation of the igniter is eliminated by the operation of the igniter, and the combustion gas from the gas generator removes the cleaved seal member from the pressurized region. It will leak out through it and out of the gas generator through the outlet of the housing.

In the gas generator configured in this way, until the igniter is activated, the filling chamber in the pressurized region is affected by the high pressure state in the pressurized region maintained by the seal member and the predetermined intervening member. It is possible to suppress the entry of moist outside air from the outside. Even if the gas in the pressurized region (such as the inert gas) can leak to the outside, the degree of leakage can be suppressed to a small extent by the predetermined intervening member, so that the predetermined airtight state can be maintained. Therefore, the moisture-proof performance of the gas generator can be maintained for a relatively long period of time. Further, since the gas generator does not require an additional moisture-proof member such as an O-ring in order to improve the moisture-proof performance, the quality control process of the moisture-proof member and the moisture-proof member are further incorporated. It is not necessary to go through the process, and it is possible to avoid an increase in the assembly load of the gas generator. That is, as the moisture-proof member, a more effective moisture-proof effect can be enjoyed only by the moisture-proof structure in the form of joining using a predetermined intervening member.

Here, in the gas generator, the housing and the igniter are included in the plurality of region defining members, the seal member is joined to the housing side by welding, and the igniter is formed. , The predetermined intervening member that is elastically deformable or plastically deformable may be interposed between the housing and fixed to the housing. In welding, the region defining members are melted and joined, and as a result, in the pressurized region, the airtightness on the side where the igniter is placed is not as good as the airtightness on the side where the seal member is placed. Absent. However, as described above, since the inside of the pressurized region is placed in a high pressure state, it is possible to suppress the ingress of outside air accompanied by moisture from the outside, and on the side where the igniter is arranged, the gas in the pressurized region Even if the gas leaks to the outside, a sufficiently high airtightness can be realized on the side where the seal member is arranged, so that the degree of the leak is gradual, and thus a predetermined airtight state in the pressurized region is sufficiently maintained. Can be maintained for a long time.

Alternatively, in the gas generator, the filling chamber is filled with at least two membrane members corresponding to the sealing member, which can also be cleaved by combustion products generated by the operation of the igniter. In the internal space of the container, a sealant which is the predetermined intervening member applied to both membrane members is arranged between the at least two membrane members, and the internal space of the filling container is pressurized. The filling container may be arranged in the housing in a region and in a state of being formed in the high pressure state. In such a configuration, the housing and the igniter different from the above-described form do not contribute to the demarcation of the pressurized region. Therefore, by adopting this configuration, the process of assembling the gas generator main body including the housing and the process of filling the gas generator and forming the pressurized region can be realized separately. As a result, the filling of the gas generator and the formation of the pressurized region can be efficiently realized, and thus the assembly load of the gas generator can be reduced.

Here, in the gas generators described above, the housing is formed in a tubular shape, the discharge port is arranged on one end side of the housing, and the igniter is the same as the discharge port. It may be arranged on the other end side of the housing with the filling chamber in between. Therefore, in such a form of gas generator, the igniter, the filling chamber, and the discharge port are arranged along the longitudinal direction of the tubular housing, and the igniter and the filling chamber are arranged in the internal space of the housing. The region on the containing side is defined as the pressurized region. The term "end side" includes not only the end face of the tubular housing but also the portion of the housing wall surface in the vicinity of the end face.

Further, in the gas generators described above, only the filling chamber may be the pressurized region. According to such a configuration, the region where the high pressure state is formed can be made as small as possible, and thus the assembly load of the gas generator can be reduced. It should be noted that the housing may include a region other than the pressurized region, that is, a non-pressurized region that is not pressurized to a high pressure state. If the housing includes a non-pressurized area, the outlet provided in the housing may be connected to the non-pressurized area. On the other hand, when the housing includes only the pressure region, the seal member is arranged so as to close the discharge port provided in the housing.

Here, the invention of the present application can be grasped from the aspect of the method of assembling the gas generator. That is, the present invention includes an igniter and a housing that houses the igniter and has an outlet that connects the inside and the outside of the housing, and is generated by the operation of the igniter in the housing. A method of assembling a gas generator in which a gas generator is burned by a combustion product, wherein the housing is a predetermined region including at least a filling region filled with the gas generator, and the predetermined region. A sealing region is provided inside the housing, which is divided by a sealing member that is cleaved by the combustion gas from the gas generating agent generated by the operation of the igniter. Then, the assembly method includes a preparatory step for preparing the igniter, the housing, and the gas generating agent in an assembly chamber in which a predetermined high pressure state higher than the atmospheric pressure is formed, and the high pressure. In the assembly chamber where the state is maintained, a filling step of filling the filling region of the housing with the gas generating agent, and in the assembly chamber where the high pressure state is maintained, the filling region in the housing. The igniter is attached to the chamber at a position on the sealing region side where the gas generating agent filled in the gas can be burned by the operation of the igniter, and a predetermined airtightness is provided in the sealing region. Includes mounting steps that form the state. According to the assembly method, it is possible to assemble a gas generator having the above-mentioned pressurized region in the housing, thereby effectively moisture-proofing the gas generator in the housing of the gas generator while reducing the assembly load. Can be realized.

Alternatively, the assembly method comprises at least two films that can be cleaved by the gas generating agent and the combustion products in an assembly chamber in which a predetermined high pressure state higher than atmospheric pressure is formed. A preparatory step for preparing a filling container formed by a sealing member, wherein the filling container is a filling region in which the internal space thereof is filled with the gas generating agent, and the high pressure state is maintained. After the filling step of filling the filling container with the gas generating agent in the assembled chamber and the filling chamber in which the high pressure state is maintained, at least two films are formed. A sealing step of sealing the filling container by applying a sealing agent between the sealing members to form a predetermined airtight state inside the filling container, and the filling in which the predetermined airtight state is formed. An igniter at a position where the container is taken out of the assembly chamber, and outside the assembly chamber, the filling container is housed in the housing, and then the filling container can be opened by the operation of the igniter. Includes a mounting step for mounting the housing with respect to the housing. Also by the assembly method, the formation of the pressure region described above can be performed separately from the assembly of the main body of the gas generator, that is, the filling step and the sealing step are performed in the assembly chamber to assemble the mounting step. Since it is performed outside the chamber, the main body side of the gas generator can be assembled in an atmosphere other than a high pressure state, and thus the assembly load of the gas generator can be reduced.
As a result, it is possible to realize effective moisture-proofing of the gas generator in the housing of the gas generator while reducing the assembly load.

According to the present invention, it is possible to suitably moisturize the gas generator arranged in the gas generator while suppressing the assembly load of the gas generator.

It is the first figure which shows the schematic structure of the gas generator of this invention. It is a figure which shows the flow of assembling of the gas generator shown in FIG. It is a flowchart about the assembly method of the gas generator shown in FIG. It is a 2nd figure which shows the schematic structure of the gas generator of this invention. It is a 3rd figure which shows the schematic structure of the gas generator of this invention. It is a 4th figure which shows the schematic structure of the gas generator of this invention. It is a flowchart about the assembly method of the gas generator shown in FIG.

Hereinafter, the gas generator according to the embodiment of the present invention and the assembly method thereof will be described with reference to the drawings. The configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

<Example 1>
FIG. 1 is a cross-sectional view of the gas generator 1 in the axial direction. An igniter 16 is attached to one end side (left side in the drawing) of the tubular housing 10. In the igniter 16, a known electric igniter body 16a is fixed to a metal igniter collar, and an ignition portion containing an igniter is arranged so as to project from the igniter collar toward the inside of the housing 10. Has been done. Therefore, the combustion product of the igniter generated by the operation of the igniter 16 is released into the housing 10. In the igniter 16, the igniter collar is crimped and fixed to the housing 10 by the caulking portion 18. At this time, caulking is realized by the caulking portion 18 with the resin O-ring 17 interposed between the igniter collar of the igniter 16 and the housing 10. As a result, a certain degree of airtightness is formed between the igniter 16 and the housing 10.

On the other hand, a diffuser 12 is attached to the other end side (right side in the drawing) of the housing 10 and is integrated with the housing 10. The diffuser 12 has a substantially cup shape having a peripheral wall portion 12b and a bottom portion 12c, and a flange portion 12a extending in the radial direction is provided at an end edge of the peripheral wall portion 12b extending along the longitudinal direction of the housing 10. There is. The end portion of the flange portion 12a is welded and fixed to the housing 10. The welded portion is referred to by reference number 11. With the flange portion 12a welded and fixed to the housing, the peripheral wall portion 12b is positioned so as to project outward from the internal space of the housing 10, and a plurality of gas discharge ports 15 are formed in the peripheral wall portion 12b. Has been done. The gas discharge port 15 is a through hole that communicates the inside and the outside of the diffuser 12 (that is, the outside of the gas generator 1). The housing 10 and the diffuser 12 may be formed of an integral member.

Further, the cup-shaped member 40 is arranged so as to be located inside the housing 10 and connected to the end surface of the flange portion 12a of the diffuser 12. The cup-shaped member 40 is a cup-shaped member having a bottom surface 40a and a peripheral wall portion 40b extending along the longitudinal direction of the housing 10, and a plurality of communication holes 40c are formed in the peripheral wall portion 40b. The communication hole 40c is a hole that communicates the inside and the outside of the cup-shaped member 40 (that is, the internal space of the housing 10). Further, a protrusion 40d is formed at the center of the bottom surface 40a of the cup-shaped member 40 so as to extend toward the igniter 16.

Here, the cup-shaped member 40 is welded and fixed to the flange portion 12a of the diffuser 12. In a state where the cup-shaped member 40 is welded and fixed to the diffuser 12, the internal space of the diffuser 12 (concave space of the cup-shaped portion) and the internal space of the cup-shaped member 40 (concave space of the cup-shaped portion) are connected. However, the opening of the cup-shaped member 40 is closed with an aluminum sealing tape 45 so as to block both internal spaces. The outer diameter of the cup-shaped member 40 is smaller than the inner diameter of the housing 10. Therefore, a gap 36 exists between the peripheral wall portion 40b and the inner wall surface of the housing 10, and the flange portion 12a of the diffuser 12 provides a dead end gap 36. The gap 36 continues with the tubular gap 35 formed between the inner cylinder 30 and the housing 10, which will be described later, and thus functions to retain mist in the combustion gas.

Here, the first perforated plate member 22 is arranged on the igniter 16 side of the housing 10 at a distance from the igniter 16. The first perforated plate member 22 is formed of a plate-shaped member having a circular peripheral edge, and the peripheral edge is pressed against the inner wall surface of the housing 10 to be fixed to the housing 10. Further, the first perforated plate member 22 is provided with a plurality of through holes 22a penetrating the front and back surfaces thereof. The space surrounded by the igniter 16, the housing 10, and the first perforated plate member 22 becomes the explosive charge filling chamber 20, and the explosive charge 21 is filled therein. The explosive is held in a state of being pressed against the igniter 16 by the first perforated plate member 22, and is in contact with the ignition portion of the igniter main body 16a. Further, since the through hole 22a of the first perforated plate member 22 has an opening smaller than that of the gunpowder 21, there is no possibility that the gunpowder 21 leaks from the gunpowder filling chamber 20. The through hole 22a may be closed with a predetermined sealing tape.

As the propellant 21, a gas generating agent having good ignitability and continuous combustion (high combustion temperature) can be used. The combustion temperature of the gunpowder 21 is preferably in the range of 1700 to 3000 ° C. As such a gunpowder, for example, a disk-shaped material having an outer diameter of 1.5 mm and a thickness of 1.5 mm, which is made of nitroguanidine (34% by weight) and strontium nitrate (56% by weight), can be used.

Next, the filling form of the gas generating agent 26 in the housing 10 will be described. In the housing 10, an inner cylinder 30 is further arranged between the first perforated plate member 22 and the cup-shaped member 40. The inner cylinder 30 has a peripheral wall portion along the longitudinal direction of the housing 10, and the outer diameter of the peripheral wall portion is smaller than the inner diameter of the housing 10. Therefore, a tubular gap 35 having an equal width is formed between the inner cylinder 30 and the housing 10. Further, in the inner cylinder 30, a plurality of gas passage holes 37 are formed in the peripheral wall portion thereof at substantially equal intervals in the longitudinal direction of the housing 10 and at substantially equal intervals in the circumferential direction of the peripheral wall portion of the inner cylinder 30. Has been done. The gas passage hole 37 is a through hole that communicates the filling chamber 25, which is the internal space of the inner cylinder 30, with the tubular gap 35. As will be described later, the gas passage hole 37 is provided so that the combustion gas generated by the combustion of the gas generating agent 26 filled in the filling chamber 25 smoothly flows to the diffuser 12 side. Therefore, the gas passage hole 37 may be formed closer to the diffuser 12 side in the peripheral wall portion of the inner cylinder 30, and the opening area of the gas passage hole 37 may increase as it approaches the diffuser 12 side. ..

Here, the inner cylinder 30 has a diameter-expanded portion 31 extending in the radial direction of the housing 10 on the igniter 16 side and formed in a flange shape, and the outer peripheral edge of the diameter-expanded portion 31 is the housing 10. It is in contact with the inner wall surface. The outer diameter of the outer peripheral edge of the enlarged diameter portion 31 is slightly larger than the inner diameter of the housing 10, and when the inner cylinder 30 is arranged in the housing 10, it is expanded by the elasticity of the peripheral wall portion of the inner cylinder 30. The diameter portion 31 is fixed to the inner wall surface of the housing 10 by being pressed against it. Therefore, no gap is formed in the pressing portion between the enlarged diameter portion 31 and the housing 10. For more stable fixing of the inner cylinder 30, a step portion to be fitted to the outer peripheral edge of the enlarged diameter portion 31 and a protrusion to be engaged may be formed on the inner wall of the housing 10.

Further, the inner cylinder 30 has a bottom surface on the diffuser 12 side, and a central hole 32 is formed in the center of the bottom surface. The central hole 32 is formed so as to be able to fit with the protrusion 40d formed on the bottom surface 40a of the cup-shaped member 40. Therefore, in the state where the inner cylinder 30 is arranged in the housing 10, the enlarged diameter portion 31 is pressed against the inner wall surface of the housing 10, and the central hole 32 is fitted into the protrusion 40d of the cup-shaped member 40. In this state, the inner cylinder 30 is stably fixed in both the longitudinal direction and the radial direction of the housing, and is arranged coaxially with the housing 10.

The internal space of the inner cylinder 30 functions as a filling chamber 25 for filling and holding the gas generating agent 26. Specifically, in a state where the filling chamber 25 of the inner cylinder 30 is filled with the gas generating agent 26, the second perforated plate member 23 is further arranged between the inner cylinder 30 and the first perforated plate member 22. Has been done. Therefore, a space 24 in which the gas generating agent or the like is not arranged is located between the first perforated plate member 22 and the second perforated plate member 23. Like the first perforated plate member 22, the second perforated plate member 23 is also formed of a plate-shaped member having a circular peripheral edge, and the peripheral edge is pressed against the inner wall surface of the housing 10 with respect to the housing 10. Is fixed. Further, the second perforated plate member 23 is provided with a plurality of through holes 23a penetrating the front and back surfaces thereof. The space surrounded by the inner cylinder 30, the housing 10, and the second perforated plate member 23 becomes the filling chamber 25, and the gas generating agent 26 is filled therein. The gas generating agent 26 is held in a state of being pressed toward the inner cylinder 30 side by the second perforated plate member 23. Therefore, the gas generating agent 26 in the filling chamber 25 is densely filled, and it is prevented from moving and forming a gap. Further, since the through hole 23a of the second perforated plate member 23 has an opening smaller than that of the gas generating agent 26, there is no possibility that the gas generating agent 26 leaks from the filling chamber 25. The through hole 23a may be closed with a predetermined sealing tape.

The gas generator 26 uses a gas generator having a lower combustion temperature than the explosive agent 21. The combustion temperature of the gas generating agent 26 is preferably in the range of 1000 to 1700 ° C., for example, an outer diameter consisting of guanidine nitrate (41% by weight), basic copper nitrate (49% by weight) and a binder or additive. A single-hole columnar one having a diameter of 1.8 mm, an inner diameter of 0.7 mm, and a length of 1.9 mm can be used.

Here, in the gas generator 1, a predetermined region in the housing 10 including the filling chamber 25 filled with the gas generating agent 26 and the gunpowder filling chamber 20 filled with the gunpowder 21, more specifically, the transmission. A predetermined region including the explosive filling chamber 20, the space 24, the filling chamber 25, the tubular gap 35, the gap 36, and the internal space of the cup-shaped member 40 is defined as a relatively highly airtight pressurized region. That is, the pressurized region is a region defined by being surrounded by the materials of the housing 10, the igniter 16, the diffuser 12, and the sealing tape 45. The airtightness of the pressurized region is realized by caulking and fixing the O-ring 17 between the igniter 16 and the housing 10 and closing the opening of the cup-shaped member 40 with the sealing tape 45. Since the diffuser 12 and the housing 10 are welded and fixed, it is not necessary to substantially consider the decrease in airtightness caused by the welded fixing portion. On the other hand, the airtightness between the housing 10 and the igniter 16 via the O-ring 17 is not as good as the airtightness due to welding fixing with the sealing tape 45. Further, the inside of the pressurized region is filled with an inert gas such as argon or helium, so that the pressure inside the pressurized region is increased to the outside (that is, the internal space of the diffuser 12 or the gas generator 1). A high pressure state is formed that is higher than the external pressure. In this embodiment, the region formed inside the gas generator 1 in which the inert gas is not filled and the pressure is lower than the pressurized region is referred to as a non-pressurized region. When the pressure in the non-pressurized region is atmospheric pressure (1 atmospheric pressure = about 100 kPa), the pressure in the pressurized region is, for example, 0.2 MPa or more, preferably about 2 MPa.

The inert gas filled to form the high pressure state in this way is generally well held in the pressurized region due to the airtightness in the pressurized region described above. Therefore, it is possible to effectively prevent outside air with moisture from the outside of the pressurized region from entering the pressurized region, particularly into the filling chamber 25 or the like filled with the gas generator 26 or the like. Therefore, the moisture-proof performance of the gas generator 1 can be maintained high. Further, if the airtightness of the O-ring 17 or the like decreases with time due to aged deterioration of the O-ring 17 or the like, or even if the O-ring 17 or the like does not deteriorate over time, the physical airtightness of the O-ring 17 or the like is improved. Even if the inert gas filled in the pressurized region leaks to the outside due to a limit or the like, the degree of leakage is so small that the inert gas can be retained in the pressurized region for a relatively long period of time. It is possible to suppress the ingress of outside air accompanied by moisture from the outside, and the moisture-proof performance of the gas generator 1 can be maintained high.

Further, by placing the filling chamber filled with the gas generating agent 26 or the like in an atmosphere in a high pressure state, it is possible to increase the combustion speed of the gas generating agent or the like. As a result, the combustion start characteristics of the gas generator 26 and the like in the gas generator 1 can be made advantageous, which accelerates the gas release of the gas generator 1 (from the operation of the igniter to the release of gas). It contributes to shortening the required time).

Here, the method of assembling the gas generator 1 will be described with reference to FIGS. 2 and 3. FIG. 2 schematically shows the flow of assembling the gas generator 1, and FIG. 3 is a flowchart of the assembling method. First, in S101, each component constituting the gas generator 1 is carried into the assembly chamber 80 for assembling the gas generator 1 to prepare for assembly. Specifically, a unit in which the diffuser 12, the cup-shaped member 40, and the sealing tape 45 are previously attached to the housing 10 is carried into the assembly chamber 80. Further, the inner cylinder 30, the required amount of gas generating agent 26, the second perforated plate member 23, the first perforated plate member 22, the required amount of explosive charge 21, and the igniter 16 to which the O-ring 17 is attached are also assembled chambers. It is carried into 80. The parts are carried into the assembly chamber 80 through the door 81 that can be opened and closed.

When all the parts are carried in, the door 81 is closed to seal the inside of the assembly chamber 80, and then the assembly chamber 80 is filled with an inert gas to form the above-mentioned high pressure state in the chamber (S102). Processing). Specifically, by controlling the opening degree of the on-off valve 83 of the tank 82 in which the inert gas is stored, the amount of the inert gas flowing from the tank 82 into the assembly chamber 80 is controlled, and the pressure is high. The formation is realized. The pressure in the assembly chamber 80 is confirmed by using a detection value of a pressure sensor (not shown).

When a high pressure state is formed in the assembly chamber 80, the inner cylinder 30 is inserted into the housing 10 carried into the chamber (process of S103). At this time, the central hole 32 of the inner cylinder 30 is fitted into the protrusion 40d of the cup-shaped member 40, and the enlarged diameter portion 31 of the inner cylinder 30 is pressed against the inner wall surface of the housing 10. After that, the gas generating agent 26 is filled in the internal space (filling chamber 25) of the inner cylinder 30 fixed to the housing 10 (treatment of S104). When the gas generating agent 26 is filled, the second perforated plate member 23 is also inserted into the housing 10 so that they do not move unnecessarily in the housing 10, and at that time, the gas generating agent 26 is formed by the second perforated plate member 23. Is inserted so as to press against the inner cylinder 30, and the second perforated plate member 23 is fixed to the housing 10.

Next, the first perforated plate member 22 is inserted into the housing 10, and the first perforated plate member 22 is fixed at a position in the housing 10 suitable for filling the required amount of the explosive agent 21. After that, the explosive charge 21 is filled in the housing 10 (processing of S105), and the igniter 16 is inserted into the housing 10 so as to come into contact with the filled explosive charge 21, and the igniter 16 is placed in the housing 10. It is attached by caulking (processing of S106). In the gas generator 1 configured in this way, the combustion agent 21 is burned by the operation of the igniter 16, and the combustion gas generated by burning the gas generator 26 by the combustion is the gas passage hole 37 and the communication hole. It passes through 40c and reaches the inside of the cup-shaped member 40. Then, the sealing tape 45 is cleaved by the energy of the combustion gas, and the combustion gas is discharged to the outside from the gas discharge port 15 of the diffuser 12. Therefore, at the fixed position of the first perforated plate member 22, the thermal energy of the igniter 21 burned by the operation of the igniter 16 propagates to the gas generating agent 26 preferably filled in the filling chamber 25, and the said It can be said that it is a position for arranging the igniter 16 at a position where the gas generating agent 26 can burn.

According to such an assembly method, the gas generator 1 is assembled in an atmosphere in a high pressure state in the assembly chamber 80, that is, the housing 10 is filled with the gas generator 26 and the explosive agent 21, and the housing 10 is ignited. 16 will be installed. As a result, in the assembled gas generator 1, an O-ring 17 and a sealing tape 45 interposed between the igniter 16 and the housing 10 form a relatively highly airtight region inside the gas generator 1. A predetermined airtight state in which the inert gas is sealed in a high pressure state is formed in the defined pressurized region. Then, after the assembly is completed, the inert gas in the assembly chamber 80 may be discharged, the door 81 may be opened, and the completed gas generator 1 may be taken out.

The gas generator assembled according to the above assembly method is the gas generator 1 shown in FIG. As described above, the gas generator 1 has a pressurized region formed by sealing the inert gas in the housing 10, so that the gas generator 1 is remarkable with respect to the explosive agent 21 and the gas generator 26. It can exhibit moisture-proof performance. This is an extremely useful effect for maintaining the gas generation performance (output performance) of the gas generator 1 suitably for a long period of time. Further, since no additional moisture-proof member (O-ring, gasket, etc.) or special moisture-proof member is required to achieve such a remarkable effect, quality control of these members and proper attachment of these to the gas generator 1 are required. No additional assembly steps are required. Therefore, according to the technique of the present embodiment, the gas generating agent 26 and the like can be suitably moisture-proofed without unnecessarily increasing the load in the assembly process.

<Modification example>
A modified example of the gas generator 1 according to this embodiment will be described with reference to FIG. Regarding the gas generator 1 shown in FIG. 4, the mounting position of the sealing tape 450 is different from the mounting position of the sealing tape 45 in the gas generator 1 shown in FIG. 1, and the other configurations are substantially the same. A detailed description of the same configuration will be omitted. In the gas generator 1 shown in FIG. 4, the sealing tape 450 is attached to the outside of the peripheral wall portion 12b so as to close the gas discharge port 15 of the diffuser 12. Alternatively, the sealing tape 450 may be attached to the inside of the peripheral wall portion 12b. Therefore, in this case, almost the entire region inside the gas generator 1 is a pressurized region, and the non-pressurized region is substantially not included. In the gas generator 1 of the present modification as well, similarly to the gas generator 1 of the above-mentioned Example 1, it is possible to suitably moisturize the gas generator 26 and the like without unnecessarily increasing the load in the assembly process. I can understand that there is.

<Example 2>
The gas generator 100 according to the second embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional view of the gas generator 100 in the axial direction. Unlike the gas generator 1 of the first embodiment, the gas generator 100 does not contain a igniter, and the gas generator 126 is directly burned by the operation of the igniter 116. Further, a filter 160 for collecting the combustion residue of the gas generator 126 is arranged in the housing 110 of the gas generator 100. Specifically, the igniter 116 is attached to one end side (left side in the drawing) of the tubular housing 110. Like the igniter 16, the igniter 116 also has a known electric igniter body fixed to a metal igniter collar, and an igniting portion containing an igniter is transferred from the igniter collar to the housing 110. It is arranged so as to project inward. Therefore, the combustion product of the igniter generated by the operation of the igniter 116 will be released into the housing 110. The igniter 116 is fixed by being crimped to the housing 110 by a caulking portion 118 whose igniter collar is located at the end of the housing 110. At this time, caulking is realized by the caulking portion 118 with the resin O-ring 117 interposed between the igniter collar of the igniter 116 and the housing 110. As a result, a certain degree of airtightness is formed between the igniter 116 and the housing 110.

An isolation wall 146 is provided at a position near the central portion of the housing 110 facing the ignition portion of the igniter 116 so as to divide the internal space of the housing 110 into two in the longitudinal direction thereof. The isolation wall 146 is welded to the housing 110 and the welded portion is referred to by reference number 146a. A through hole 147 that communicates the two internal spaces in the divided housing 110 is provided in the substantially central portion of the isolation wall 146. Before the igniter 116 is activated, the through holes 147 are closed with aluminum sealing tape 145 so as to block both internal spaces, and the peripheral edge of the sealing tape 145 is welded and fixed to the isolation wall 146. The welded part is referred to by reference number 145a. Then, in the gas generator 100, the space surrounded by the igniter 116, the housing 110, the isolation wall 146, and the sealing tape 145 becomes the filling chamber 125, and the gas generator 126 is filled therein. The gas generating agent 126 is filled to such an extent that it cannot move in the filling chamber 125, and therefore the ignition portion of the igniter body and the gas generating agent 126 are in contact with each other. As a result, when the igniter 116 is activated, the combustion product burns the gas generating agent 126, the combustion gas generated there cleaves the sealing tape 145, and the combustion gas is contained in the housing 110 divided by the isolation wall 146. Of the internal space of the above, the gas flows into an internal space (filter chamber which is the internal space on the right side in the drawing) different from the filling chamber 125.

The filter chamber is a space defined by a terminal wall 148 provided at the end of the housing 110 and opposite to the side on which the igniter 116 is arranged, and the isolation wall 146 and the housing 110. Is. A plurality of gas discharge ports 115 are formed in the housing 110 corresponding to the filter chamber. The gas discharge port 115 is a through hole that communicates the inside and the outside of the housing 110 (that is, the outside of the gas generator 1). Therefore, the filter chamber is not required to have the airtightness of the filling chamber 125. Therefore, the end wall 148 does not need to be welded and fixed to the housing 110 like the isolation wall 146, and in this embodiment, it is only caulked and fixed to the housing 110 by the caulking portion 148a.

Further, a filter 160 formed in an annular shape and extending in the longitudinal direction of the housing 110 is arranged so as to face the gas discharge port 115. The filter 160 is formed by stacking stainless steel flat braided wire meshes in the radial direction and compressing them in the radial and axial directions to cool the combustion gas generated in the filling chamber 125 and collect the combustion residue. The space of the hollow portion 150 of the filter 160 is connected to the through hole 147, and the combustion gas generated by the combustion of the gas generating agent 126 is introduced into the hollow portion 150 of the filter 160 and further discharged through the filter 160. You will be guided to exit 115. Further, on the outside of the filter 160, between the outer peripheral surface of the filter 160 and the inner wall surface of the housing 110 so that the filter 160 is not deformed by the gas pressure when the igniter 116 is operated and does not block the gas discharge port 135. , An annular gap 151 is formed.

Here, in the gas generator 100, in the internal space of the housing 110, a predetermined region in the housing 110 including the filling chamber 125 filled with the gas generator 126 is regarded as a relatively highly airtight pressurized region. To. The airtightness of the pressurized region is realized by caulking and fixing the O-ring 117 between the igniter 116 and the housing 10 and closing the through hole 147 provided in the isolation wall 146 with sealing tape 145. .. The isolation wall 146 and the housing 1
Since the space between the sealing tape 145 and the isolation wall 146 is welded and fixed, it is not necessary to substantially consider the decrease in airtightness caused by the welded fixing point. Further, as in the first embodiment, the inside of the pressurized region is filled with an inert gas such as argon or helium, so that the pressure inside the pressurized region is increased to the outside (that is, the filter 160). A high pressure state is formed in which the pressure is higher than the pressure of the filter chamber in which the gas generator is arranged or the outside of the gas generator 100). The filter chamber in which the filter 160 is arranged is a non-pressurized region because the inside and the outside of the housing 110 are communicated with each other via the gas discharge port 135.

The inert gas filled to form the high pressure state in this way is generally well held in the pressurized region due to the airtightness in the pressurized region described above. Therefore, it is possible to effectively prevent outside air accompanied by moisture from entering the filling chamber 125 in the pressurized region from the outside of the pressurized region, and thus the moisture-proof performance of the gas generator 100 is maintained high. Further, if the airtightness of the O-ring 117 or the like decreases with time due to aged deterioration of the O-ring 117 or the like, or if the physical airtightness of the O-ring 117 or the like does not deteriorate over time, Even if the inert gas filled in the pressurized region leaks to the outside due to a limit or the like, the degree of leakage is so small that the inert gas can be retained in the pressurized region for a relatively long period of time. It is possible to suppress the ingress of outside air accompanied by moisture from the outside, and the moisture-proof performance of the gas generator 100 can be maintained high. Further, by placing the filling chamber 125 filled with the gas generating agent 126 in an atmosphere in a high pressure state, it is possible to increase the combustion rate of the gas generating agent 126.

Further, the gas generator 100 configured in this way is also assembled in the assembly chamber 80 filled with the inert gas shown in FIG. 2 in the same manner as the gas generator 1 of the first embodiment, thereby assembling the gas generator 100. The pressurized region can be formed inside. Therefore, the gas generator 100 does not require an additional moisture-proof member (O-ring, gasket, etc.) or a special moisture-proof member in order to obtain the above-mentioned suitable moisture-proof performance. As a result, these quality controls and additional assembly steps to properly attach them to the gas generator are no longer required, so that according to the techniques of the present embodiment, the load on the assembly process is not unnecessarily increased. The gas generator 126 and the like can be suitably moisture-proofed.

<Example 3>
The gas generator 200 according to the third embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view of the gas generator 200 in the axial direction. Of the parts constituting the gas generator 200, the parts substantially the same as the components of the gas generator 100 of the second embodiment are designated by the same reference numbers, and detailed description thereof will be omitted. In the gas generator 200, the internal space of the housing 110 is divided into two spaces by the isolation wall 146, that is, the space on the igniter 116 side and the space on the terminal wall 148 side. In this embodiment, the isolation wall 146 does not necessarily have to be welded and fixed to the housing 110. Further, the through hole 147 provided in the isolation wall 146 is not closed by a sealing member such as a sealing tape 145 as shown in the gas generator 100 of the second embodiment. Therefore, the internal space itself of the housing 110 is in a state of being substantially communicated with the outside thereof.

Here, a canister 225, which is a filling container formed of a thin film of aluminum, is arranged in the space on the igniter 116 side of the housing 110. The canister 225 has a peripheral wall portion 225a and a bottom surface portion 225d, and the peripheral wall portion 225a and the bottom surface portion 225d are formed of a single sheet-shaped aluminum thin film. Further, the top surface portion 225b formed of another sheet-shaped aluminum thin film is wound and fixed (caulked and fixed) to the peripheral wall portion 225a end portion of the aluminum thin film including the peripheral wall portion 225a and the bottom surface portion 225d. The portion to be wound and fixed is referred to by reference number 225c. When forming the winding fixing portion 225c, a known sealing agent is applied between the two aluminum thin films. The sealing agent corresponds to a predetermined intervening member of the present invention, and when cured, it imparts a predetermined airtightness to the canister 225. Further, by winding and fixing the two aluminum thin films, an external force is applied to the cured sealant, which contributes to the formation of a predetermined airtightness. The airtightness between the aluminum thin films due to the cured sealant is not as high as the airtightness due to welding fixing with the sealing tape 45 in Example 1 above.

The internal space of the canister 225 is filled with a gas generating agent 226, and the top surface portion 225b thereof faces the ignition portion of the igniter 116, and the peripheral wall portion 225a extends in the longitudinal direction of the housing 110. The canister 225 is arranged in the internal space of the housing 110 so that the bottom surface portion 225d faces the through hole 147. Here, in the gas generator 200, the internal space of the canister 225 is a pressurized region having a relatively high airtightness. The airtightness of the pressurized region is realized by the winding fixing portion 225c accompanied by application of a sealing agent. Further, as in the first embodiment, the inside of the canister 225 is filled with an inert gas such as argon or helium, so that the internal pressure thereof becomes higher than the pressure outside the canister 225. The state is formed. The internal space of the housing 110 other than the canister 225 is a non-pressurized region because the inside and the outside of the housing 110 are substantially communicated with each other via the gas discharge port 135.

The inert gas filled to form the high pressure state in this way is generally well held in the canister 225 due to the above airtightness. Therefore, it is possible to effectively prevent outside air accompanied by moisture from entering the canister 225 from the outside of the canister 225, and thus the moisture-proof performance of the gas generator 200 can be maintained high. Further, if the airtightness of the winding fixing portion 225c decreases with time due to its deterioration over time, or due to the limit of its physical airtightness, the filled inert gas is external. Even if the gas leaks to the canister 225, the inert gas can be retained in the canister 225 for a relatively long period of time because the degree of the leak is very small, and the ingress of outside air with moisture from the outside is suppressed and gas is generated. The moisture-proof performance of the vessel 200 can be maintained high.

Further, the gas generator 200 configured in this way is assembled according to the assembly method shown in FIG. 7. Specifically, FIG. 7 is a flowchart of the assembly method. First, in S201, when assembling the gas generator 200, the parts constituting the canister 225, specifically, the aluminum thin film including the peripheral wall portion 225a and the bottom surface portion 225d and the aluminum thin film including the top surface portion 225b are assembled in the assembly chamber 80. In addition to being carried into the canister 225, the required amount of gas generating agent 226 to be filled is also carried into the canister 225. When these parts are carried in, the door 81 is closed to seal the inside of the assembly chamber 80, and then the assembly chamber 80 is filled with an inert gas to form the above-mentioned high pressure state in the chamber (S202). Processing). The formation of the high pressure state is performed by controlling the inflow amount of the inert gas from the tank 82, as in the treatment of S102.

When a high pressure state is formed in the assembly chamber 80, the gas generating agent 226 is filled inside the canister 225 (a recessed space formed by the aluminum thin film and defined by the peripheral wall portion 225a and the bottom surface portion 225d). (Processing of S203). When the gas generator 226 is filled, the aluminum thin film containing the top surface portion 225b is coated with the sealant and then wound and fixed to the other aluminum thin film to seal the gas generator 226 into the canister 225. (Processing of S204). Then, after waiting for the applied sealant to dry, the canister 225 filled with the gas generating agent 226 is taken out from the assembly chamber 80 (processing of S205).

Next, outside the assembly chamber 80, that is, in an atmosphere where a high pressure state is not formed, the space on the side of the internal space of the housing 110 where the igniter 116 is to be mounted (the space on the terminal wall 148 side). The canister 225 is housed in the opposite space) (processing of S206). Further, the igniter 116 is inserted into the housing 110 so that the ignition portion of the igniter 116 faces the top surface portion 225b of the canister 225, and is attached to the housing 110 by caulking (processing of S207). When the igniter 116 is attached to the housing 110, the filter 160 or the end wall 148 may already be attached to the housing 110, or the filter 160 or the like is attached after the igniter 116 is attached to the housing 110. You may. When the igniter 116 is operated by the gas generator 200 configured in this way, the combustion product mainly cleaves the top surface portion 225b and induces combustion of the gas generator 226 in the canister 225. Then, the combustion gas generated by the combustion of the gas generator 226 is cleaved at the bottom surface portion 225d and discharged to the outside of the gas generator 200 through the through hole 147 and the filter 160.

As described above, in the gas generator 200, the canister 225 of the gas generator 226 is filled in the assembly chamber 80, and the canister 225 is housed in the housing 110, so that the inert gas is filled and the pressure is high. The pressurized region in which the state is formed can be included in the gas generator 200. Therefore, the gas generator 200 does not require an additional moisture-proof member (O-ring, gasket, etc.) or a special moisture-proof member in order to obtain the above-mentioned suitable moisture-proof performance. As a result, these quality controls and additional assembly steps to properly attach them to the gas generator are no longer required, so that according to the techniques of the present embodiment, the load on the assembly process is not unnecessarily increased. The gas generator 226 and the like can be suitably moisture-proofed. Further, since the mounting process of the igniter 116 is performed outside the assembly chamber, the gas generator 200 can be efficiently assembled.

1, 100, 200: Gas generator 10, 110: Housing 12: Diffuser 15, 115: Gas outlet 16, 116: Ignition device 17, 117: O-ring 18, 118: Caulking part 20: Explosive charge filling chamber 21: Explosive agent 22: First perforated plate member 22a: Through hole 23: Second perforated plate member 23a: Through hole 25, 125: Filling chamber 26, 126, 226: Gas generating agent 30: Inner cylinder 40: Cup-shaped member 45, 145, 450: Seal tape 80: Assembly chamber 81: Door 82: Tank 83: On-off valve 146: Isolation wall 147: Through hole 160: Filter 225: Canister

Claims (8)

With an igniter
A housing that houses the igniter and has an outlet that connects the inside and the outside of the housing.
A filling chamber filled with a solid gas generating agent, in which the gas generating agent is arranged at a position in the housing where the filled gas generating agent can be burned by the operation of the igniter.
Is a gas generator equipped with
By surrounded by a plurality of regions defining member, given to the external of said predetermined area in a predetermined area before Symbol the housing that the gas generating agent within the housing includes at least all of the region filled comprising a filling chamber A pressure region is further provided, which is a region in which the airtight state of the above is formed, and in which a high pressure state higher than the external pressure of the predetermined region is formed.
The plurality of region defining members include a seal member that maintains the predetermined airtight state before the operation of the igniter and is cleaved by combustion gas from the gas generating agent generated by the operation of the igniter. ,
At least one region-defining member included in the plurality of region-defining members and the other region-defining member are not joined by welding, but are arranged between the two region-defining members in a state where an external force is applied. Joined through,
Gas generator. The plurality of region defining members include the housing and the igniter.
The sealing member is joined to the housing side by welding.
The igniter is fixed to the housing by interposing the predetermined intervening member that is elastically deformable or plastically deformable with the housing.
The gas generator according to claim 1. With an igniter
A housing that houses the igniter and has an outlet that connects the inside and the outside of the housing.
A filling chamber filled with a solid gas generating agent, in which the gas generating agent is arranged at a position in the housing where the filled gas generating agent can be burned by the operation of the igniter.
Filling room and
Is a gas generator equipped with
A region in which a predetermined airtight state with respect to the outside of the predetermined region is formed at least in a predetermined region in the housing including the filling chamber by being surrounded by a plurality of region defining members, and further, the predetermined region. Further provided is a pressurized region in which a high pressure state higher than the pressure outside the region is formed.
The plurality of region defining members include a seal member that maintains the predetermined airtight state before the operation of the igniter and is cleaved by combustion gas from the gas generating agent generated by the operation of the igniter. ,
At least one region-defining member included in the plurality of region-defining members and the other region-defining member are not joined by welding, but are arranged between the two region-defining members in a state where an external force is applied. Joined through
The filling chamber is an internal space of a filling container formed of at least two membrane members corresponding to the sealing member, which can be cleaved by a combustion product generated by the operation of the igniter.
A sealant, which is a predetermined intervening member, applied to both membrane members is arranged between the at least two membrane members.
The internal space of the filling container is the pressurized region, and the filling container is arranged in the housing in a state of being formed in the high pressure state.
Gas generator. The pressurized region is filled with a predetermined inert gas to form the high pressure state.
The gas generator according to any one of claims 1 to 3. The housing is formed in a tubular shape, and the outlet is arranged on one end side of the housing.
The igniter is arranged on the other end side of the housing with the filling chamber in between with respect to the outlet.
The gas generator according to any one of claims 1 to 4. Only the filling chamber is the pressurized region.
The gas generator according to any one of claims 1 to 5. An igniter, a housing for accommodating the igniter, a housing having an outlet for connecting the inside and the outside of the housing, and a filling chamber filled with a solid gas generating agent, wherein the housing is filled with the above. A method of assembling a gas generator, comprising a filling chamber for arranging the gas generator at a position where the filled gas generator can be burned by the operation of the igniter.
The gas generator is surrounded by a plurality of region defining members, whereby the predetermined region in the housing including at least all the regions filled with the gas generator in the housing including the filling chamber. A region in which a predetermined airtight state is formed with respect to the outside of the region, and a pressurized region in which a high pressure state higher than the pressure outside the predetermined region is formed is further provided.
The plurality of region defining members include a seal member that maintains the predetermined airtight state before the operation of the igniter and is cleaved by combustion gas from the gas generating agent generated by the operation of the igniter. ,
At least one region-defining member included in the plurality of region-defining members and the other region-defining member are not joined by welding, but are arranged between the two region-defining members in a state where an external force is applied. Joined through
Said housing, said a predetermined region, and, to the external of said predetermined region, a sealing regions partitioned by the sealing member has in the interior of the housing,
The assembly method is
A preparatory step for preparing the igniter, the housing, and the gas generating agent in an assembly chamber in which a predetermined high pressure state higher than the atmospheric pressure is formed.
The high pressure condition within the assembly chamber, which is maintained, a filling step of filling the gas generating agent Filling area that the housing Yusuke,
In the assembly chamber in which the high pressure state is maintained, the gas generating agent filled in the filling region in the housing can be burned by the operation of the igniter at a position on the sealing region side. attach the igniter relative to the housing, by forming the predetermined airtight state sealing area, and a mounting step of forming the pressure region,
How to assemble a gas generator, including. It comprises an igniter and a housing that houses the igniter and has an outlet that connects the inside and the outside of the housing, and gas is generated in the housing by combustion products generated by the operation of the igniter. It is a method of assembling a gas generator that burns the agent.
The assembly method is
A filling container formed of the gas generating agent and at least two film-like sealing members that can be cleaved by the combustion product is prepared in an assembly chamber in which a predetermined high pressure state higher than the atmospheric pressure is formed. The preparatory step, wherein the internal space of the filling container is a filling region filled with the gas generating agent.
A filling step of filling the filling container with the gas generating agent in the assembly chamber in which the high pressure state is maintained, and
In the assembly chamber in which the high pressure state is maintained, after the filling step, the filling container is sealed by applying a sealing agent between the at least two film-shaped sealing members to seal the filling container. A sealing step that forms a predetermined airtight state inside the
A take-out step of taking out the filling container in which the predetermined airtight state is formed to the outside of the assembly chamber, and
A mounting step of housing the filling container in the housing outside the assembly chamber and then attaching the igniter to the housing at a position where the filling container can be cleaved by the operation of the igniter.
How to assemble a gas generator, including.

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