JP2007331491A - Gas generator and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas generator of high performance which is safely and easily manufactured at low costs. <P>SOLUTION: The gas generator 1A comprises: an input section assembly 10 mainly structured of a base member 11; a first output section assembly 20A1 mainly structured of a first cylindrical member 211; and a second output section assembly 20A2 mainly structured of a second cylindrical member 212. The base member 11 is provided with: an ignition chamber 13 housing a single igniter 14 and ignition charge 15; and a first opening part 11a and a second opening part 11b communicated with the ignition chamber 13. The first cylindrical member 211 and the second cylindrical member 212 are respectively formed of a bottomed cylindrical member, and have a first combustion chamber 231 and a second combustion chamber 232 housing the gas generating agent 241 and 242. The first opening part 11a is closed by a bottom part 211b of the first cylindrical member 211, and the second opening part 11b is closed by a bottom part 212b of the second cylindrical member 212. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gas generator incorporated in an occupant protection device mounted on an automobile or the like and a method for manufacturing the same, and more specifically, a gas generator capable of obtaining a plurality of gas outputs with a single igniter. The present invention relates to a container and a manufacturing method thereof.

  2. Description of the Related Art Conventionally, airbag devices, which are occupant protection devices, have been widely used from the viewpoint of protecting occupants such as automobiles. The airbag device is equipped for the purpose of protecting the occupant from the impact caused by the collision of the vehicle or the like, and the airbag is used as a cushion by instantly inflating and deploying the airbag at the time of the collision of the vehicle or the like. It is to catch the body of. The gas generator is a device that is incorporated in the airbag device and inflates and deploys the airbag by instantaneously generating gas when a vehicle or the like collides.

  There are various types of airbag devices depending on the mounting position on a vehicle or the like, the body part to be protected, and the like. For example, in an airbag device mounted on an automobile, an airbag for a driver's seat installed in front of the driver's seat, an airbag for a passenger seat installed in front of the passenger's seat, the driver's seat or the passenger's seat So-called side airbags, curtain airbags, and the like installed on the side are known. For this reason, there are various types of gas generators incorporated in the airbag apparatus, and an optimal configuration is selected according to the specifications.

  One of various gas generator configurations is a so-called T-shaped gas generator that has a cylindrical housing closed at both ends and from which gas is ejected. The T-shaped gas generator is provided with one ignition chamber for storing an igniter and a charge transfer agent at a central position of the cylindrical housing, and on both ends of the cylindrical housing, which is a position for sandwiching the ignition chamber. A pair of combustion chambers in which the gas generating agent is accommodated are provided, and gas outlets communicating with the respective combustion chambers are separately provided at both ends of the cylindrical housing. In this T-shaped gas generator, two gas output units that generate and output gas can be provided independently, and these two gas output units can be driven by one igniter. As a document disclosing this T-shaped gas generator, for example, there is JP-A-8-26064 (Patent Document 1).

  FIG. 13 is a cross-sectional view of a conventional T-shaped gas generator disclosed in Patent Document 1. As shown in FIG. 13, in a conventional T-shaped gas generator 1001, a base member 1011 and a support member 1012 are provided at the center in the axial direction of a cylindrical member 1211 whose both ends are closed by closing members 1291 and 1292. An igniter 1014 and a transfer charge 1015 are accommodated in an ignition chamber 1013 that is disposed and defined by the base member 1011 and the support member 1012. Then, on both outer sides of the ignition chamber 1013, a first combustion chamber 1231 in which the gas generating agent 1241 is stored and a second combustion chamber 1232 in which the gas generating agent 1242 is stored are arranged so as to sandwich the ignition chamber 1013, respectively. ing. Filters 1281 and 1282 are accommodated in portions of the space inside the cylindrical member 1211 partitioned by the first partition plate 1251 and the second partition plate 1252 and located on both outer sides of the partition plates 1251 and 1252. A first filter chamber 1271 and a second filter chamber 1272 are respectively disposed.

  The ignition chamber 1013 in which the transfer powder 1015 is stored and the first combustion chamber 1231 in which the gas generating agent 1241 is stored are connected by a first transfer path 1011a provided in the base member 1011 and the transfer charge 1015 is stored. The ignition chamber 1013 and the second combustion chamber 1232 in which the gas generating agent 1242 is accommodated communicate with each other through a second heat transfer path 1011b provided in the base member 1011. Further, the first combustion chamber 1231 and the first filter chamber 1271 communicate with each other through a communication hole 1251a provided in the first partition plate 1251, and the second combustion chamber 1232 and the second filter chamber 1272 are connected to the second partition plate 1252. It communicates with the communication hole 1252a provided in the. A first gas outlet 1221 and a second gas outlet 1222 for ejecting the generated gas are provided on the peripheral surface of the cylindrical member 1211 at a part defining the first filter chamber 1271 and the second filter chamber 1272. As a result, gas output portions are provided at both ends of the cylindrical member 1211.

In the conventional T-shaped gas generator 1001, when the igniter 1014 is activated at the time of a vehicle collision, the transfer charge 1015 in the ignition chamber 1013 is ignited and burned, and the transfer charge 1015 is generated by combustion. The hot particles flow into the first combustion chamber 1231 and the second combustion chamber 1232 through the first heat transfer path 1011a and the second heat transfer path 1011b, respectively, and are thereby accommodated in the first combustion chamber 1231 and the second combustion chamber 1232. The generated gas generating agents 1241 and 1242 are ignited and burned, respectively. A large amount of gas is generated in the first combustion chamber 1231 and the second combustion chamber 1232 by the combustion of the gas generating agents 1241 and 1242, and the generated gases are stored in the first filter chamber 1271 and the second filter chamber 1272, respectively. The first gas jet port 1221 and the second gas jet port 1222 are jetted out of the cylindrical member 1211 through the filters 1281 and 1282. The airbag is inflated and deployed by the gas ejected from the cylindrical member 1211.
JP-A-8-26064

  The above-described conventional gas generator 1001 has a symmetrical structure around the axial central portion of the cylindrical housing, and is configured such that the outputs of the pair of left and right gas output portions are substantially equal. ing.

  However, when it is not desired to equalize the output at the pair of gas output portions (for example, when one airbag is attached to each of the pair of gas output portions and they are deployed at different deployment speeds) When it is desired to change the internal pressure after deployment between the pair of airbags, or by attaching a single airbag to both of the pair of gas output units, and adjusting the duration of gas output in the pair of gas output units For example, when it is desired to extend the duration of the deployed airbag), the combustion characteristics of the gas generating agent 1241 stored in the first combustion chamber 1231 and the gas generating agent stored in the second combustion chamber 1232 are used. It is necessary to make the combustion characteristics of 1242 different. More specifically, the type and composition of the gas generating agent 1241 accommodated in the first combustion chamber 1231 is different from the type and composition of the gas generating agent 1242 accommodated in the second combustion chamber 1232, or the first combustion chamber It is necessary to make the filling amount of the gas generating agent 1241 accommodated in 1231 different from the filling amount of the gas generating agent 1242 accommodated in the second combustion chamber 1232.

  However, when it is assumed that the outputs of the pair of gas output units differ according to various specifications, the structure of the above-described conventional gas generator 1001 is not necessarily a structure suitable for such a change in specifications. I can not say. That is, the above-described conventional gas generator 1001 has a structure in which all the components are accommodated in a single cylindrical member 1211, and the gas generating agent 1241 accommodated in the pair of left and right gas output portions. In order to change the type, composition, filling amount, and the like of 1242, it is necessary to make a significant design change for all the components, which is a major factor in reducing manufacturing costs. In addition, it may be necessary to change the manufacturing process in accordance with the above design change, which is a major factor that complicates the manufacturing work.

  Moreover, in order to manufacture the above-mentioned conventional gas generator 1001, it is necessary to go through the following steps. First, the base member 1011 filled with the transfer charge 1015 is inserted into the cylindrical member 1211 made of a single member, and the base member 1011 is inserted into the cylindrical member 1211 by the support member 1012 to which the igniter 1014 is attached. Fix in the axial center. Subsequently, the containers 1231a and 1232a in which the gas generating agents 1241 and 1242 are accommodated are inserted from the openings provided at both ends of the cylindrical member 1211, respectively, and the first partition plate 1251 and the second partition plate 1252 are further opened. Are inserted into the cylindrical member 1211 from the respective portions. Next, the filters 1281 and 1282 are inserted into the cylindrical member 1211 from the openings, respectively, and the openings are closed by the first closing member 1291 and the second closing member 1292, respectively.

  As described above, in the conventional gas generator 1001 described above, the workability at the time of manufacture is not necessarily efficient, which has been a factor in pressing the manufacturing cost. In particular, it is necessary to fill the containers 1231a and 1232a with the gas generating agents 1241 and 1242 in advance, resulting in complicated manufacturing work.

  Further, since the gas generating agents 1241 and 1242 and the explosive charge 1015 are chemicals having very high combustibility, sufficient safety management is required for handling them. Therefore, the more complicated the manufacturing operation, the more difficult it is to manage the safety of the operation. Therefore, facilitating the manufacturing operation as much as possible is a very important issue.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a high-performance gas generator that can be manufactured safely and easily at low cost.

  The gas generator based on this invention is provided with a base member, a 1st cylindrical member, and a 2nd cylindrical member. The base member is provided with an ignition chamber in which a single igniter and transfer charge are accommodated, a first opening that communicates with the ignition chamber, and a second opening that communicates with the ignition chamber. The first cylindrical member is a bottomed cylindrical member, and is provided with a first combustion chamber in which a gas generating agent is accommodated and a first filter chamber in which a filter is accommodated. The second cylindrical member is a bottomed cylindrical member, and is provided with a second combustion chamber in which a gas generating agent is accommodated and a second filter chamber in which a filter is accommodated. In the gas generator according to the present invention, the first opening is closed by the bottom of the first cylindrical member, and the first heat transfer path that communicates between the first combustion chamber and the ignition chamber is the above-mentioned. A second heat transfer is provided at the bottom of the first cylindrical member, the second opening is closed by the bottom of the second cylindrical member, and communicates with the second combustion chamber and the ignition chamber. A path is provided at the bottom of the second tubular member.

  Thus, while forming a pair of output parts using the bottomed cylindrical 1st cylindrical member and the 2nd cylindrical member, the bottoms of these 1st cylindrical member and the 2nd cylindrical member are these 1st cylindrical members. The first cylindrical member and the second cylindrical member are manufactured at the time of manufacturing by closing the first opening and the second opening of the base member that connects the cylindrical member and the second cylindrical member. It is possible to attach the first cylindrical member and the second cylindrical member to the base member after each of them is filled with the gas generating agent. Therefore, since it becomes possible to manufacture a pair of assemblies that constitute the output unit separately from the assembly that constitutes the input unit in advance, the workability at the time of production is dramatically improved and the production is easy. It will become. Further, the first cylindrical member and the second cylindrical member can be directly filled with the gas generating agent, so that it is not necessary to prepare a separate container for storing the gas generating agent, and the manufacturing can be easily performed. Become. For this reason, it becomes possible to manufacture a gas generator safely and inexpensively.

  Also, by preparing multiple types of output assembly according to various specifications in advance, even if there is a change in specifications, by selecting the required output assembly from these and connecting them with the base member, It becomes possible to respond flexibly to specification changes. Therefore, a high-performance gas generator can be provided at a low cost.

  In the gas generator according to the present invention, the first cylindrical member and the second cylindrical shape are arranged such that the ignition chamber, the first combustion chamber, and the second combustion chamber are linearly arranged. The base member is preferably sandwiched between members.

  By comprising in this way, since the external shape of a housing becomes a substantially cylindrical shape, a gas generator can be reduced in size. Therefore, the assembling property with respect to the airbag apparatus or the like is maintained to be superior.

  In the gas generator according to the present invention, it is preferable that the first cylindrical member and the second cylindrical member are attached to the base member by welding or caulking. The thickness of the bottom portion of the first cylindrical member is greater than the thickness of the peripheral wall portion of the first cylindrical member, or the thickness of the bottom portion of the second cylindrical member is that of the peripheral wall portion of the second cylindrical member. The thickness is preferably larger than the thickness.

  By comprising in this way, attachment to the base member of a 1st cylindrical member and a 2nd cylindrical member becomes easy. That is, by making the thickness of the bottom portions of the first cylindrical member and the second cylindrical member thick, it becomes easy to perform caulking and welding.

  In the gas generator according to the present invention, a cylinder with respect to the base member is provided between at least one of the first cylindrical member and the base member or between the second cylindrical member and the base member. A connection assisting member that enables attachment of the shaped member may be disposed.

  By comprising in this way, the cylindrical member from which an outer diameter dimension differs can be easily attached to a base member, and it becomes possible to respond | correspond flexibly when a specification changes.

The manufacturing method of the gas generator based on this invention comprises the following processes.
(A) A step of filling a gas generating agent into the space inside the bottomed cylindrical first tubular member having an opening at one end and a bottom at the other end through the opening.
(B) A step of inserting a filter into the space inside the first cylindrical member through the opening.
(C) A closing member is attached to the one end of the first cylindrical member so as to close the opening, whereby the space inside the first cylindrical member in which the gas generating agent and the filter are accommodated. Sealing step.
(D) A step of filling the space inside the second cylindrical member with a bottom having a opening at one end and a bottom at the other end with the gas generating agent through the opening.
(E) A step of inserting a filter into the space inside the second cylindrical member through the opening.
(F) A closing member is attached to the one end of the second cylindrical member so as to close the opening, whereby the space inside the second cylindrical member in which the gas generating agent and the filter are accommodated. Sealing step.
(G) The first opening of the base member having the first opening and the second opening that communicates with the space provided inside is closed by the bottom of the first tubular member after sealing. The process of attaching the said 1st cylindrical member after sealing with respect to the said base member.
(H) The second cylindrical member after sealing is attached to the base member so that the second opening of the base member is closed by the bottom of the second cylindrical member after sealing. Process.
(I) A step of filling the space of the base member with a transfer charge.
(J) A step of attaching an igniter to the space of the base member.

  By adopting such a manufacturing method, the first tubular member and the second tubular member are respectively attached to the base member after the first tubular member and the second tubular member are filled with the gas generating agent. It becomes possible to install. Therefore, since it becomes possible to manufacture a pair of assemblies that constitute the output unit separately from the assembly that constitutes the input unit in advance, the workability at the time of production is dramatically improved and the production is easy. It will become. Further, the first cylindrical member and the second cylindrical member can be directly filled with the gas generating agent, so that it is not necessary to prepare a separate container for storing the gas generating agent, and the manufacturing can be easily performed. Become. For this reason, it becomes possible to manufacture a gas generator safely and inexpensively.

  Also, by preparing multiple types of output assembly according to various specifications in advance, even if there is a change in specifications, by selecting the required output assembly from these and connecting them with the base member, It becomes possible to respond flexibly to specification changes. Therefore, a high-performance gas generator can be provided at a low cost.

  According to the present invention, a high-performance gas generator that can be manufactured safely and easily can be provided at low cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment described below, the present invention is applied to a so-called T-shaped gas generator that has a substantially cylindrical housing closed at both ends and from which gas is ejected. A description will be given by exemplifying.

(Embodiment 1)
1A and 1B are diagrams showing an external structure of a gas generator according to Embodiment 1 of the present invention. FIG. 1A is a front view of the gas generator, and FIG. 1B is a top view. FIG. 2 is a cross-sectional view showing the internal structure of the gas generator shown in FIG. First, the external structure and internal structure of the gas generator in the present embodiment will be described with reference to these drawings.

  As shown in FIG. 1 (A) and FIG. 1 (B), the gas generator 1A in the present embodiment has a long, substantially cylindrical outer shape, and is an input unit located at the center in the axial direction. The assembly 10 includes three assemblies: a first output unit assembly 20A1 located at one end in the axial direction, and a second output unit assembly 20A2 located at the other end in the axial direction.

  As shown in FIG. 1 (A), FIG. 1 (B) and FIG. 2, a long and substantially cylindrical housing constituting the outer shell of the gas generator 1A includes a base member 11, a support member 12, The first cylindrical member 211 as the first cylindrical member, the second cylindrical member 212 as the second cylindrical member, the first closing member 291, and the second closing member 292 are configured. The input assembly 10 described above is mainly composed of a base member 11 and a support member 12. The first output part assembly 20A1 described above is mainly constituted by the first cylindrical member 211, and the second output part assembly 20A2 is mainly constituted by the second cylindrical member 212.

  The base member 11 has a first opening portion 11a and a second opening portion 11b at both end portions in the axial direction, and an opening portion 11c provided in a direction intersecting the axial direction at a predetermined position on the peripheral surface thereof. Have. The support member 12 is fitted into the base member 11 so as to close the opening 11c provided in the base member 11, and supports an igniter (squib) 14 described later.

  Each of the first cylindrical member 211 and the second cylindrical member 212 has a bottomed cylindrical shape, and includes peripheral wall portions 211a and 212a that form a cylindrical shape, and a bottom portion 211b that is positioned at one end in the axial direction. 212b and openings 211c and 212c located at the other end in the axial direction. The first cylindrical member 211 is attached to the base member 11 so as to close the first opening 11a provided at one end of the base member 11 in the axial direction, and the second cylindrical member 212 is The base member 11 is attached to the base member 11 so as to close the second opening 11b provided at the other end in the axial direction of the base member 11. The first closing member 291 is attached to the first cylindrical member 211 so as to close the opening 211c provided at one end of the first cylindrical member 211 in the axial direction, and the second closing member 292 The second cylindrical member 212 is attached to the second cylindrical member 212 so as to close the opening 212c provided at the end of the cylindrical member 212 in the axial direction.

  As shown in FIG. 2, a first partition plate 251 that divides the space inside the first cylindrical member 211 in the axial direction is disposed at a predetermined position in the axial direction of the first cylindrical member 211. A second partition plate 252 that divides the space inside the second cylindrical member 212 in the axial direction is disposed at a predetermined position in the axial direction of the two cylindrical members 212.

  The base member 11, the support member 12, the first cylindrical member 211, the second cylindrical member 212, the first partition plate 251, the second partition plate 252, the first closing member 291 and the second closing member 292 are all included. It consists of metal members such as stainless steel, steel, aluminum alloy, and stainless alloy, and is connected and fixed by welding or caulking, respectively. Specifically, the support member 12 is caulked and fixed while being inserted into the opening 11 c of the base member 11, and the first cylindrical member 211 and the second cylindrical member 212 are welded to the end of the base member 11. Fixed by. The first partition plate 251 and the first closing member 291 are both fixed by being fitted into the hollow portion of the first cylindrical member 211 and caulking the peripheral wall portion 211a of the first cylindrical member 211 inward. The The second partition plate 252 and the second closing member 292 are both fixed by being fitted into the hollow portion of the second cylindrical member 212 and caulking the peripheral wall portion 212a of the second cylindrical member 212 inward. The In addition, the code | symbols 61 and 62 shown in the figure are the welding parts produced by welding the 1st cylindrical member 211 and the 2nd cylindrical member 212 to the base member 11. FIG.

  As shown in FIG. 1A, FIG. 1B, and FIG. 2, gas is ejected to the peripheral wall portion 211a of the first cylindrical member 211 that is not fixed to the base member 11 and closer to the end portion. For this purpose, a first gas outlet 221 is provided, and a first gas output portion is formed in this portion. In addition, the peripheral wall 212a near the end of the second cylindrical member 212 that is not fixed to the base member 11 is provided with a second gas outlet 222 for jetting gas. A second gas output portion is formed.

  As shown in FIG. 2, the base member 11, the supporting member 12, the first cylindrical member 211, the second cylindrical member 212, the first partition plate 251, the second partition plate 252, the first closing member 291 and the second closing member. Inside the substantially cylindrical housing formed of the member 292, the ignition chamber 13 in which the igniter 14 and the transfer powder 15 are accommodated, the first combustion chamber 231 in which the gas generating agent 241 is accommodated, and the filter 281 are accommodated. The first filter chamber 271, the second combustion chamber 232 in which the gas generating agent 242 is accommodated, and the second filter chamber 272 in which the filter 282 is accommodated are mainly provided. A first heat transfer path 211b1 is provided at the bottom 211b of the first cylindrical member 211 so that the ignition chamber 13 and the first combustion chamber 231 communicate with each other, and the ignition chamber 13 and the second combustion chamber 232 communicate with each other. In addition, a second heat transfer path 212b1 is provided at the bottom 212b of the second cylindrical member 212. Further, the first partition plate 251 is provided with a communication hole 251a so that the first combustion chamber 231 and the first filter chamber 271 communicate with each other, and the second combustion chamber 232 and the second filter chamber 272 communicate with each other. The two partition plates 252 are provided with communication holes 252a.

  Note that the gas generator 1A in the present embodiment has a symmetric structure around a substantially central portion in the axial direction of a substantially cylindrical housing, and the first combustion chamber 231 is located on the left side in the drawing. The first filter chamber 271 and the second combustion chamber 232 and the second filter chamber 272 are arranged on the right side in the drawing. Therefore, the ignition chamber 13, the first combustion chamber 231 and the second combustion chamber 232 are arranged side by side in a straight line.

  The ignition chamber 13 is defined by the base member 11 and the support member 12 and is provided inside the input unit assembly 10. The ignition chamber 13 contains the single igniter 14 and the transfer charge 15 as described above. The igniter 14 supported by the support member 12 is disposed in a recess 12a provided in the support member 12 so that the terminal pin 14a is exposed on the outer surface of the gas generator 1A. A connector (not shown) for connecting the igniter 14 and the collision detection sensor is connected to the terminal pin 14a.

  Seal members 41 and 42 are attached to the bottom portion 211b of the first cylindrical member 211 where the first heat transfer path 211b1 is formed and the bottom portion 212b of the second cylindrical member 212 where the second heat transfer path 212b1 is formed, respectively. The sealing members 41 and 42 close the opening surface of the first heat transfer path 211b1 and the opening surface of the second heat transfer path 212b1, respectively. In addition, as the sealing members 41 and 42, an aluminum foil or the like in which an adhesive member is applied on one side is used. Thereby, the airtightness between the ignition chamber 13 and the 1st heat transfer path 211b1 and the 2nd heat transfer path 212b1 is ensured.

  The igniter 14 is an ignition device for generating a flame, and includes an ignition agent (not shown) and a resistor (not shown) for burning the ignition agent inside. More specifically, the igniter 14 includes a base portion through which a pair of header pins are inserted and held, and a squib cup attached to the base portion, and connects the tip ends of the header pins inserted into the squib cup. A resistor (bridge wire) is attached to the squib cup, and an igniting agent is filled in the squib cup so as to surround the resistor or in contact with the resistor. Nichrome wire or the like is generally used as the resistor, and ZPP (zirconium / potassium perchlorate), ZWPP (zirconium / tungsten / potassium perchlorate), lead tricinate, or the like is generally used as the igniting agent. The squib cup is generally made of metal or plastic.

  When a collision is detected, a predetermined amount of current flows through the resistor via the terminal pin 14a. When a predetermined amount of current flows through the resistor, Joule heat is generated in the resistor, and the ignition agent starts burning. The high temperature flame generated by the combustion ruptures the squib cup containing the igniting agent. The time from when the current flows through the resistor until the igniter 14 is activated is 2 milliseconds or less when a nichrome wire is used as the resistor.

  A seal member 16 is interposed between the igniter 14 and the support member 12. The seal member 16 is for sealing the ignition chamber 13 by airtightly sealing a gap generated between the igniter 14 and the support member 12, and when the igniter 14 is caulked and fixed to the support member 12. Is inserted into the gap. A seal member 17 is also interposed between the base member 11 and the support member 12. The seal member 17 is for sealing the ignition chamber 13 by hermetically sealing a gap generated between the base member 11 and the support member 12, and when the support member 12 is caulked and fixed to the base member 11. Is inserted into the gap.

  As the sealing members 16 and 17, it is preferable to use a material made of a material having sufficient heat resistance and durability. For example, it is preferable to use an O-ring made of EPDM resin which is a kind of ethylene propylene rubber. . In addition, if the liquid sealing agent is separately applied to the portion where the sealing members 16 and 17 are interposed, the sealing performance of the ignition chamber 13 can be further improved.

The explosive charge 15 filled in the ignition chamber 13 is ignited by the flame generated by the operation of the igniter 14 and burns to generate heat particles. The charge transfer agent 15 needs to be able to start combustion of the gas generating agents 241 and 242 with certainty. Generally, from the metal powder / oxidant represented by B / KNO ₃ or the like. The composition etc. which become are used. As the explosive charge 15, a powdered material, a material molded into a predetermined shape by a binder, or the like is used. Examples of the shape of the transfer charge molded by the binder include various shapes such as a granular shape, a columnar shape, a sheet shape, a spherical shape, a single-hole cylindrical shape, a porous cylindrical shape, and a tablet shape.

  The first combustion chamber 231 is defined by the peripheral wall portion 211a and the bottom portion 212b of the first cylindrical member 211 and the first partition plate 251 and is provided near one end (the left portion in the drawing) of the substantially cylindrical housing. . The second combustion chamber 232 is defined by the peripheral wall portion 212a and the bottom portion 212b of the second cylindrical member 212 and the second partition plate 251 and is provided near the other end (right portion in the drawing) of the substantially cylindrical housing. . The first combustion chamber 231 and the second combustion chamber 232 contain the gas generating agents 241 and 242 as described above.

  The gas generating agents 241 and 242 are ignited by the hot particles generated by the combustion of the transfer charge 15 ignited by the igniter 14 and generate gas by burning. The gas generating agents 241 and 242 are generally formed as a molded body containing a fuel, an oxidant, and an additive. As the fuel, for example, a triazole derivative, a tetrazole derivative, a guanidine derivative, an azodicarbonamide derivative, a hydrazine derivative, or a combination thereof is used. Specifically, for example, nitroguanidine, guanidine nitrate, cyanoguanidine, 5-aminotetrazole and the like are preferably used. In addition, as the oxidizing agent, for example, nitrate containing a cation selected from alkali metals, alkaline earth metals, transition metals, and ammonia is used. As the nitrate, for example, sodium nitrate, potassium nitrate and the like are preferably used. In addition, examples of the additive include a binder, a slag forming agent, and a combustion adjusting agent. As the binder, for example, an organic binder such as a metal salt of carboxymethyl cellulose or a stearate, or an inorganic binder such as synthetic hydroxytalcite or acidic clay can be suitably used. As the slag forming agent, silicon nitride, silica, acid clay, etc. can be suitably used. Moreover, as a combustion regulator, a metal oxide, ferrosilicon, activated carbon, graphite, etc. can be used suitably.

  The shape of the molded body of the gas generating agents 241 and 242 includes various shapes such as granules, pellets, columns, and disks. In addition, a porous (for example, a single-hole cylindrical shape or a porous cylindrical shape) having a hole inside the molded body is also used. These shapes are preferably selected as appropriate according to the specifications of the airbag apparatus in which the gas generator 1A is incorporated. For example, the shape in which the gas generation rate changes with time when the gas generating agents 241 and 242 are burned. It is preferable to select an optimal shape according to the specification, such as selecting. In addition to the shape of the gas generating agents 241 and 242, it is preferable to appropriately select the size and filling amount of the molded body in consideration of the linear combustion speed, the pressure index, and the like of the gas generating agents 241 and 242.

  In the first combustion chamber 231 and the second combustion chamber 232, the bottom portion 211b of the first cylindrical member 211 provided with the first heat transfer path 211b1 and the second cylindrical member 212 provided with the second fire transfer path 212b1. Cushion materials 31 and 32 are arranged so as to come into contact with the bottom 212b. The cushion materials 31 and 32 are attached for the purpose of preventing the gas generating agents 241 and 242 made of a molded body from being pulverized by vibration or the like. Preferably, a molded body of ceramic fiber, foamed silicon, or the like is used. Used.

  Perforated plates 261 and 262 are arranged at the end of the first combustion chamber 231 on the first partition plate 251 side and the end of the second combustion chamber 232 on the second partition plate 252 side, respectively. The perforated plates 261 and 262 move to the first filter chamber 271 and the second filter chamber 272, respectively, when the gas generating agents 241 and 242 accommodated in the first combustion chamber 231 and the second combustion chamber 232 are in an unburned state. Therefore, the communication holes 261a and 262a provided in the perforated plates 261 and 262 are both formed smaller than the outer shapes of the gas generating agents 241 and 242, and the first partition is formed. It is formed smaller than the communication hole 251 a provided in the plate 251 and the communication hole 252 a provided in the second partition plate 252.

  The first filter chamber 271 is defined by the peripheral wall portion 211a of the first cylindrical member 211, the first partition plate 251 and the first closing member 291 and is closer to one end of the substantially cylindrical housing (the left portion in the figure). Provided. The second filter chamber 272 is defined by the peripheral wall portion 212a of the second cylindrical member 212, the second partition plate 252 and the second closing member 292, and is closer to the other end of the substantially cylindrical housing (the right portion in the figure). Provided. In the first filter chamber 271 and the second filter chamber 272, the filters 281 and 282 are accommodated as described above. The first filter chamber 271 and the second filter chamber 272 include a gas jet port 221 provided in the peripheral wall portion 211 a of the first cylindrical member 211 and a gas jet port 222 provided in the peripheral wall portion 212 a of the second cylindrical member 212. To communicate with the outside.

  Filters 281 and 282 are made of, for example, a wire or mesh material made of metal such as stainless steel or steel, or a material that is pressed and hardened by pressing. The filters 281 and 282 cool the gas by taking the high-temperature heat of the gas when the gas generated in the first combustion chamber 231 and the second combustion chamber 232 passes through the filters 281 and 282. In addition to functioning as a means, it also functions as a removing means for removing residues (slag) and the like contained in the gas. In addition, as the filters 281 and 282, members in which hollow portions 281a and 282a extending in the axial direction are preferably formed are used. In this way, the flow resistance between the generated gas and the filters 281 and 282 is kept low, and an efficient gas flow is realized.

  As described above, the first partition plate 251 and the second partition plate 252 are provided with communication holes 251a and 252a, respectively. The main holes located on the first combustion chamber 231 side of the first partition plate 251 and the main surface located on the second combustion chamber 232 side of the second partition plate 252 are respectively closed with the communication holes 251a and 252a. Seal members 51 and 52 are attached. As the sealing members 51 and 52, an aluminum foil or the like in which an adhesive member is applied on one side is used. Thereby, the airtightness between the first combustion chamber 231 and the first filter chamber 271 and the airtightness between the second combustion chamber 232 and the second filter chamber 272 are ensured.

  Next, the operation of the gas generator in the present embodiment will be described. When a vehicle on which the gas generator 1A according to the present embodiment is mounted collides, the collision is detected by a collision detection means provided separately in the vehicle, and the igniter 14 is operated based on this. The explosive charge 15 accommodated in the ignition chamber 13 is ignited and burned by the flame generated by the operation of the igniter 14, and generates a large amount of heat particles. Due to the combustion of the transfer agent 15, the pressure in the ignition chamber 13 increases, whereby the sealing of the seal members 41 and 42 is broken, and the heat particles pass through the first transfer path 211 b 1 and the second transfer path 212 b 1. Then, the air enters the first combustion chamber 231 and the second combustion chamber 232. The gas that has entered the first combustion chamber 231 and the second combustion chamber 232 reaches the cushion materials 31, 32, and the cushion materials 31, 32 are opened or divided by the heat, whereby the heat particles are converted into the first combustion chamber 231. To the gas generating agent 241 stored in the second combustion chamber 232 and the gas generating agent 242 stored in the second combustion chamber 232.

  The gas generating agents 241 and 242 are ignited and burned by the flowing heat particles to generate a large amount of gas. Due to the combustion of the gas generating agents 241 and 242, the pressures in the first combustion chamber 231 and the second combustion chamber 232 are increased, whereby the sealing of the seal members 51 and 52 is broken, and the generated gas is removed from the first filter. It flows into the chamber 271 and the second filter chamber 272, respectively. Then, the gas that has flowed in passes through the filters 281 and 282, is cooled to a predetermined temperature, is ejected from the gas ejection ports 221 and 222 to the outside of the housing, and is guided to the inside of the airbag. Inflate and deploy the bag.

  In the gas generator 1A in the present embodiment described above, the first cylindrical member 211 is the base so that the first opening 11a of the base member 11 is closed by the bottom 211b of the first cylindrical member 211. The second cylindrical member 212 is attached to the other end of the base member 11 such that the second cylindrical member 212 is attached to one end of the member 11 and the second opening 11b of the base member 11 is closed by the bottom 212b of the second cylindrical member 212. ing. The first combustion chamber 231 provided in the first cylindrical member 211 and the ignition chamber 13 provided in the base member 11 are provided in the first transmission provided in the bottom 211b of the first cylindrical member 211. The second combustion chamber 232 provided inside the second cylindrical member 212 and the ignition chamber 13 provided inside the base member 11 are connected to the bottom 212b of the second cylindrical member 212 through the fire path 211b1. It communicates with the provided second heat transfer path 212b1. With this configuration, a gas generator that can be assembled safely and easily can be obtained, and a high-performance gas generator can be provided at low cost. In the following, this point will be described in detail.

  3 to 7 are schematic cross-sectional views in each step for explaining the method of manufacturing the gas generator in the present embodiment. In manufacturing the gas generator 1A according to the present embodiment, the first output unit assembly 20A1 and the second output unit assembly 20A2 are first completed in advance, and then these two output unit assemblies 20A1 and 20A2 constitute the input unit assembly. The base member 11 is attached to the base member 11 and then the input unit assembly 10 is completed. Below, each said procedure is demonstrated in detail. In the gas generator 1A according to the present embodiment, the first output unit assembly 20A1 and the second output unit assembly 20A2 attached to the left and right of the base member 11 have the same configuration and shape, and can be manufactured through the same process. Therefore, only the procedure for manufacturing the first output assembly 20A1 will be described in detail, and the description of the procedure for manufacturing the second output assembly 20A2 will be omitted.

  First, as shown in FIG. 3, a first cylindrical member 211 is prepared as a low-cylindrical first cylindrical member having an opening 211 c at one end and a bottom 211 b at the other end. The first cylindrical member 211 can be manufactured, for example, by casting with a metal such as stainless steel, or by pressing or welding a metal plate such as stainless steel. In addition, it is preferable to provide the 1st gas ejection port 221 in advance in the surrounding wall part 211a of the 1st cylindrical member 211, and it is the 1st heat transfer path 211b1 beforehand in the bottom part 211b of the 1st cylindrical member 211. Is preferably provided.

  Next, a cushion material 31 made of, for example, a ceramic fiber molded body is inserted into the space inside the first cylindrical member 211 through the opening 211c. Thereby, the 1st heat transfer path 211b1 provided in the bottom part 211b of the 1st cylindrical member 211 will be obstruct | occluded. Next, a predetermined amount of the gas generating agent 241 is dropped into the space inside the first cylindrical member 211 in the direction of arrow A in the figure through the opening 211c, so that the gas generating agent 241 is put into the first cylindrical member 211. To fill.

  Next, as shown in FIG. 4, a porous plate 261 made of, for example, stainless steel and a first plate are formed in the space inside the first cylindrical member 211 filled with a predetermined amount of the gas generating agent 241 through the opening 211c. The one partition plate 251 is sequentially inserted. Next, the perforated plate 261 and the first partition plate 251 are fixed to the first cylindrical member 211 by caulking the peripheral wall portion 211a of the first cylindrical member 211 in the direction indicated by the arrow B in the drawing. As a result, the first combustion chamber 231 in which the gas generating agent 241 is accommodated is formed inside the first cylindrical member 211. In addition, a sealing member 51 made of, for example, an aluminum foil is attached to the first partition plate 251 in advance so as to close the communication hole 251a provided in the substantially central portion.

  Next, as shown in FIG. 5, the opening is formed in a space inside the first cylindrical member 211 filled with a predetermined amount of the gas generating agent 241 and fixed with the porous plate 261 and the first partition plate 251. A filter 281 formed by pressing and compacting a net material made of, for example, stainless steel through 211c is inserted. Next, a first closing member 291 made of, for example, stainless steel is attached to the opening 211c so as to close the opening 211c of the first cylindrical member 211, and the first cylinder is formed in the direction indicated by arrow C in the drawing. The first closing member 291 is fixed to the first cylindrical member 211 by caulking the peripheral wall portion 211 a of the cylindrical member 211. As a result, the first filter chamber 271 in which the filter 281 is accommodated is formed inside the first cylindrical member 211. Thereafter, by sticking a seal member 41 made of, for example, aluminum foil from the outside of the first cylindrical member 211 so as to close the first heat transfer path 211b1 provided at the bottom 211b of the first cylindrical member 211. Then, the production of the first output unit assembly 20A1 is completed.

  Next, as shown in FIG. 6, a base member 11 having a first opening portion 11 a and a second opening portion 11 b communicating with a space provided inside is prepared. The first cylindrical member 211 can be manufactured, for example, by casting with a metal such as stainless steel, or by pressing or welding a metal plate such as stainless steel. In addition, in addition to the above-mentioned first opening portion 11a and second opening portion 11b, an opening portion 11c for attaching the support member 12 is provided in advance at a predetermined position of the base member 11.

  Next, the first output unit assembly 20A1 manufactured in the above-described process and the second output unit assembly 20A2 manufactured in the same process as the above-described process are attached to the base member 11. At this time, the arrow D in the figure is set so that the first output assembly 20A1 closes the first opening 11a of the base member 11 and the second output assembly 20A2 closes the second opening 11b of the base member 11. Two output part assemblies 20A1 and 20A2 are attached to the base member 11 in the direction, and are connected and fixed by welding at the welding parts 61 and 62, respectively. Next, the explosive charge 15 is dropped into the space inside the base member 11 in which the first opening portion 11a and the second opening portion 11b are closed, thereby transferring the charge to the space inside the base member 11 through the opening portion 11c. Fill with gunpowder 15.

  Next, as shown in FIG. 7, the support member 12 to which the igniter 14 is caulked and fixed in advance is attached to the opening 11c of the base member 11 from the direction indicated by the arrow E, and the base member that forms the periphery of the opening 11c. The support member 12 is fixed to the base member 11 by caulking the peripheral wall portion 11 toward the inside. Thereby, the ignition chamber 13 in which the igniter 14 and the charge transfer material 15 are accommodated is formed inside the base member 11. Thus, the manufacture of the gas generator 1A having the structure shown in FIGS. 1A, 1B, and 2 is completed.

  By adopting the gas generator having the configuration described above and the manufacturing method thereof, the base after the gas generating agents 241 and 242 are filled in the first cylindrical member 211 and the second cylindrical member 212, respectively, at the time of manufacturing. The first cylindrical member 211 and the second cylindrical member 212 can be attached to the member 11, respectively. Therefore, since it becomes possible to manufacture the pair of output unit assemblies 20A1 and 20A2 separately from the input unit assembly 10 in advance, the workability at the time of manufacturing is dramatically improved and the manufacturing is facilitated. It will be. Further, the first cylindrical member 211 and the second cylindrical member 212 can be directly filled with the gas generating agents 241 and 242, and it is not necessary to prepare a container for storing the gas generating agents 241 and 242 separately. Manufacture can be easily performed. For this reason, it becomes possible to manufacture a gas generator safely and inexpensively.

  In addition, in the gas generator in the present embodiment, by preparing a plurality of types of output unit assemblies corresponding to various specifications in advance, the necessary output unit assemblies can be selected from these even when the specifications are changed. By connecting with the base member, it becomes possible to respond to the specification change very flexibly. Therefore, a high-performance gas generator can be provided at a low cost. In the following, some examples in the case where output unit assemblies having different configurations on the left and right are selected will be exemplified as modified examples.

(First modification)
FIG. 8 is a cross-sectional view of a gas generator according to a first modification. In this modification, the output unit assembly shown in FIG. 2 is used as the first output unit assembly. The second output unit assembly has the same internal structure as that of the first output unit assembly and has an axial length. This is an example where only different output assemblies are selected. In addition, the same code | symbol is attached | subjected in the figure about the part similar to 1 A of gas generators in above-mentioned Embodiment 1, and the description is not repeated here.

  As shown in FIG. 8, the gas generator 1B according to the present modification has a long and substantially cylindrical outer shape, and includes an input unit assembly 10 positioned substantially at the center in the axial direction and one end in the axial direction. The first output unit assembly 20A is located at the first part, and the second output unit assembly 20B is located at the other end in the axial direction. The first output section assembly 20A is mainly configured by a bottomed cylindrical first cylindrical member 211, and the second output section assembly 20B is mainly configured by a bottomed cylindrical second cylindrical member 212. Has been.

  The second cylindrical member 212 is configured to have the same diameter as that of the first cylindrical member 211, and is configured to be different from the first cylindrical member 211 only in the axial direction length. That is, the axial length L2 of the second cylindrical member 212 is configured to be smaller than the axial length L1 of the first cylindrical member 211. Accordingly, the filling amount of the gas generating agent 242 accommodated in the second cylindrical member 212 is made smaller than the filling amount of the gas generating agent 241 accommodated in the first cylindrical member 211. . Therefore, it is possible to flexibly cope with specifications with different outputs in the pair of left and right gas output units by adopting the configuration as in this modification.

(Second modification)
FIG. 9 is a cross-sectional view of a gas generator according to a second modification. In addition, this modification utilizes the output part assembly shown in FIG. 2 as the first output part assembly, and the second output part assembly has the same internal structure as that of the first output part assembly but has a different diameter. It is an example when an assembly is selected. In addition, the same code | symbol is attached | subjected in the figure about the part similar to 1 A of gas generators in above-mentioned Embodiment 1, and the description is not repeated here.

  As shown in FIG. 9, the gas generator 1 </ b> C according to the present modification has a long, substantially cylindrical outer shape, and includes an input unit assembly 10 that is positioned substantially at the center in the axial direction and one end in the axial direction. The first output unit assembly 20A is located at the center, and the second output unit assembly 20C is located at the other end in the axial direction. The first output section assembly 20A is mainly configured by a bottomed cylindrical first cylindrical member 211, and the second output section assembly 20C is mainly configured by a bottomed cylindrical second cylindrical member 212. Has been.

  The second cylindrical member 212 is configured to have a diameter different from that of the first cylindrical member 211. That is, the diameter R2 of the second cylindrical member 212 is configured to be smaller than the diameter R1 of the first cylindrical member 211. Accordingly, the filling amount of the gas generating agent 242 accommodated in the second cylindrical member 212 is made smaller than the filling amount of the gas generating agent 241 accommodated in the first cylindrical member 211. . Therefore, it is possible to flexibly cope with specifications with different outputs in the pair of left and right gas output units by adopting the configuration as in this modification. In addition, in order to fill the difference between the diameter of the second cylindrical member 211 and the opening diameter of the second opening 11b of the base member 11 of the input unit assembly 10, there is a gap between the base member 11 and the second cylindrical member 212. The connection auxiliary member 70 is interposed. The connection auxiliary member 70 and the base member 11 are connected by welding at the welding portion 63, and the connection auxiliary member 70 and the second cylindrical member 212 are connected by welding at the welding portion 64. ing.

(Third Modification)
FIG. 10 is a cross-sectional view of a gas generator according to a third modification. In this modification, the output assembly shown in FIG. 2 is used as the first output assembly, and an output assembly having an internal structure different from that of the first output assembly is selected as the second output assembly. This is an example. In addition, the same code | symbol is attached | subjected in the figure about the part similar to 1 A of gas generators in above-mentioned Embodiment 1, and the description is not repeated here.

  As shown in FIG. 10, the gas generator 1D according to the present modification has a long and substantially cylindrical outer shape, and includes an input unit assembly 10 that is positioned at the approximate center in the axial direction and one end in the axial direction. The first output unit assembly 20A is located at the first part, and the second output unit assembly 20D is located at the other end in the axial direction. The first output unit assembly 20A is mainly configured by a bottomed cylindrical first cylindrical member 211, and the second output unit assembly 20D is mainly configured by a bottomed cylindrical second cylindrical member 212. Has been.

  Unlike the first output assembly 20A, the second output assembly 20D does not include a partition plate that separates the combustion chamber and the filter chamber. That is, the gas generating agent 242 and the filter 282 are arranged so as to be in direct contact with each other inside the second cylindrical member 212. And the partition plate 252 is arrange | positioned rather than the part in which the filter 282 is separately arrange | positioned (namely, the 2nd gas ejection port 222 side). Accordingly, the gas output of the second gas output unit is configured to be different from the gas output of the first gas output unit. Thus, it is possible to flexibly cope with specifications with different outputs in the pair of left and right gas output units by adopting the configuration as in this modification.

(Embodiment 2)
FIG. 11 is a cross-sectional view of the gas generator according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected in the figure about the part similar to 1 A of gas generators in above-mentioned Embodiment 1, and the description is not repeated here.

  As shown in FIG. 11, the gas generator 1E in the present embodiment has a long, substantially cylindrical outer shape, and includes an input unit assembly 10 positioned substantially at the center in the axial direction and one end in the axial direction. The first output unit assembly 20E1 located in the first part and the second output unit assembly 20E2 located in the other end part in the axial direction are configured. The first output part assembly 20E1 is mainly constituted by a bottomed cylindrical first cylindrical member 211, and the second output part assembly 20E2 is mainly constituted by a bottomed cylindrical second cylindrical member 212. Has been.

  In the gas generator 1E in the present embodiment, unlike the gas generator 1A in the first embodiment described above, the thickness D1 of the bottom portion 211b of the first cylindrical member 211 of the first output unit assembly 20E1 is the first output. The thickness of the peripheral wall 211a of the first cylindrical member 211 of the part assembly 20E1 is larger than the thickness of the bottom 212b of the second cylindrical member 212 of the second output part assembly 20E2. Similarly to the case of 211, it is formed to be larger than the thickness of the peripheral wall 212a of the second cylindrical member 212 of the second output assembly 20E2. With this configuration, it is possible to use caulking for attaching the first cylindrical member 211 and the second cylindrical member 212 to the base member 11.

  In the gas generator 1A according to the first embodiment described above, since the bottoms of the first cylindrical member 211 and the second cylindrical member 212 are thin, there is not enough space for caulking. For this reason, welding is used to attach the first cylindrical member 211 and the second cylindrical member 212 to the base member 11. However, when welding is performed, heat generated during welding may be transmitted to the gas generating agent 241 accommodated in the first cylindrical member 211 or the gas generating agent 242 accommodated in the second cylindrical member 212. There is. For this reason, it is necessary to perform welding using some cooling means, and workability is not necessarily excellent.

  However, if mounting by caulking can be adopted, heat is not generated at the connecting portion, so that the mounting can be performed safely and easily, and workability is excellent. Therefore, by providing the space for caulking as described above at the bottom 211b of the first cylindrical member 211 and the bottom 212b of the second cylindrical member 212, it is possible to manufacture the gas generator safely and inexpensively. It becomes possible.

  In order to secure the airtightness of the ignition chamber 13 in order to attach the first cylindrical member 211 and the second cylindrical member 212 to the base member 11 by caulking, like the gas generator 1E in the present embodiment, Between the first cylindrical member 211 and the second cylindrical member 212 and the base member 11, it is necessary to provide seal members 81 and 82 made of, for example, O-rings. Therefore, the thickness of the bottom part 211b of the first cylindrical member 211 and the bottom part 212b of the second cylindrical member 212 needs to be thick enough to perform caulking and perform an airtight process.

  In addition, when making the bottom part 211b of the 1st cylindrical member 211 and the bottom part 212b of the 2nd cylindrical member 212 thick as mentioned above, ensure long distance between a connection part and a gas generating agent. Therefore, the first cylindrical member 211 and the second cylindrical member 212 can be attached to the base member 11 by welding without using a cooling means. In the case of such a configuration, it is not necessary to interpose the seal member between the first cylindrical member 211 and the second cylindrical member 212 and the base member 11, so that the manufacturing cost can be reduced.

(Embodiment 3)
FIG. 12 is a cross-sectional view of the gas generator according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the gas generator 1E in the above-mentioned Embodiment 2, and the description is not repeated here.

  As shown in FIG. 12, the gas generator 1F in the present embodiment has a long, substantially cylindrical outer shape, and includes an input unit assembly 10 positioned substantially at the center in the axial direction and one end in the axial direction. The first output unit assembly 20F1 is located in the first part, and the second output unit assembly 20F2 is located in the other end part in the axial direction. The first output part assembly 20F1 is mainly constituted by a bottomed cylindrical first cylindrical member 211, and the second output part assembly 20F2 is mainly constituted by a bottomed cylindrical second cylindrical member 212. Has been.

  In the gas generator 1F in the present embodiment, the ignition chamber 13 formed inside the base member 11 of the input unit assembly 10 is hermetically sealed in the internal space 93 closed by the container 91 and the cap 92. Stopped explosive 15 is contained. The container 91 and the cap 92 are made of a metal material such as an aluminum alloy, for example.

  Further, in the gas generator 1F in the present embodiment, the thickness D2 of the bottom portion 211b of the first cylindrical member 211 of the first output unit assembly 20F1 is similar to the gas generator 1E in the second embodiment described above. The first output part assembly 20F1 is formed to have a thickness greater than the thickness of the peripheral wall part 211a of the first cylindrical member 211, and the thickness of the bottom part 212b of the second cylindrical member 212 of the second output part assembly 20F2 is also the second output. The thickness of the peripheral wall 212a of the second cylindrical member 212 of the part assembly 20F2 is formed.

  However, in the gas generator 1F according to the present embodiment, unlike the gas generator 1E according to the second embodiment, the bottom 211b of the first cylindrical member 211 and the bottom 212b of the second cylindrical member 212 are different. The thickness is such that caulking can be performed, and no airtight treatment is applied. This is because the transfer charge 15 is hermetically sealed by the container 91 and the cap 92, and the airtight process is again performed between the first cylindrical member 211 and the second cylindrical member 212 and the base member 11. This is because there is no need.

  By comprising in this way, it becomes possible to utilize caulking for attachment of the 1st cylindrical member 211 and the 2nd cylindrical member 212 with respect to the base member 11, and the 1st cylindrical member formed thickly The bottom 211b of 211 and the bottom 212b of the second cylindrical member 212 can be suppressed to a thickness necessary for caulking. Therefore, the lengthening of the gas generator in the axial direction can be suppressed to the minimum necessary, and a small gas generator can be obtained. In the gas generator 1F in the present embodiment as well, it is possible to ensure a long distance between the connecting portion and the gas generating agent. Therefore, the first welding is performed without using cooling means instead of caulking. The cylindrical member 211 and the second cylindrical member 212 can be attached to the base member 11.

  In Embodiments 1 to 3 described above, the present invention is applied to a so-called T-shaped gas generator that has a substantially cylindrical housing closed at both ends and from which gas is ejected. However, the present invention can be applied to any gas generator that has two or more gas output units driven by one igniter. Therefore, the present invention can be applied to gas generators having various configurations other than the above-described T-shaped gas generator.

  In the first to third embodiments described above, the gas generator having the structure in which the igniter and the transfer charge are separately accommodated in the ignition chamber has been described as an example. At the same time, it is possible to adopt a configuration in which a charge is filled. Even in that case, the present invention can naturally be applied.

  Thus, the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the external appearance structure of the gas generator in Embodiment 1 of this invention, (A) is a front view, (B) is a top view. It is sectional drawing which shows the internal structure of the gas generator in Embodiment 1 of this invention. It is a schematic cross section for demonstrating the manufacturing method of the gas generator in Embodiment 1 of this invention. It is a schematic cross section for demonstrating the manufacturing method of the gas generator in Embodiment 1 of this invention. It is a schematic cross section for demonstrating the manufacturing method of the gas generator in Embodiment 1 of this invention. It is a schematic cross section for demonstrating the manufacturing method of the gas generator in Embodiment 1 of this invention. It is a schematic cross section for demonstrating the manufacturing method of the gas generator in Embodiment 1 of this invention. It is sectional drawing of the gas generator which concerns on a 1st modification. It is sectional drawing of the gas generator which concerns on a 2nd modification. It is sectional drawing of the gas generator which concerns on a 3rd modification. It is sectional drawing of the gas generator in Embodiment 2 of this invention. It is sectional drawing of the gas generator in Embodiment 3 of this invention. It is sectional drawing of the conventional gas generator.

Explanation of symbols

  1A to 1F Gas generator, 10 input assembly, 11 base member, 11a first opening, 11b second opening, 11c opening, 12 support member, 12a recess, 13 ignition chamber, 14 igniter, 14a terminal pin , 15 Transfer powder, 16, 17 Seal member, 20A, 20A1, 20A2, 20B-20D, 20E1, 20E2, 20F1, 20F2 Output part assembly, 211 First cylindrical member, 211a Peripheral wall part, 211b Bottom part, 211b1 First transmission Fire path, 211c opening, 212 second cylindrical member, 212a peripheral wall, 212b bottom, 212b1 second heat transfer path, 212c opening, 221 first gas outlet, 222 second gas outlet, 231 first combustion Chamber, 232 second combustion chamber, 241, 242 gas generating agent, 251 first partition plate, 251a Through hole, 252 Second partition plate, 252a Communication hole, 261, 262 Perforated plate, 261a, 262a Communication hole, 271 First filter chamber, 272 Second filter chamber, 281, 282 Filter, 281a, 282a Hollow part, 291 First 1 closing member, 292 2nd closing member, 31, 32 cushion material, 41, 42, 51, 52 sealing member, 61-64 welded portion, 70 connection auxiliary member, 81, 82 sealing member, 91 container, 92 cap, 93 space.

Claims (6)

A base member provided with an ignition chamber in which a single igniter and a charge transfer material are accommodated, a first opening communicating with the ignition chamber, and a second opening communicating with the ignition chamber;
A first tubular member comprising a bottomed tubular member, provided with a first combustion chamber in which a gas generating agent is accommodated and a first filter chamber in which a filter is accommodated;
A second cylindrical member comprising a bottomed cylindrical member, provided with a second combustion chamber in which a gas generating agent is accommodated and a second filter chamber in which a filter is accommodated;
The first opening is closed by the bottom of the first tubular member, and a first heat transfer path that communicates between the first combustion chamber and the ignition chamber is provided at the bottom of the first tubular member. ,
The second opening is closed by the bottom of the second cylindrical member, and a second heat transfer path passing through the second combustion chamber and the ignition chamber is provided at the bottom of the second cylindrical member. A gas generator.   The base member is sandwiched between the first cylindrical member and the second cylindrical member so that the ignition chamber, the first combustion chamber, and the second combustion chamber are linearly arranged. The gas generator according to 1.   The gas generator according to claim 1 or 2, wherein the first tubular member and the second tubular member are attached to the base member by welding or caulking.   The thickness of the bottom portion of the first cylindrical member is larger than the thickness of the peripheral wall portion of the first cylindrical member, or the thickness of the bottom portion of the second cylindrical member is a peripheral wall portion of the second cylindrical member. The gas generator according to claim 3, wherein the gas generator is larger than the thickness of the gas generator.   A connection assisting member that enables attachment of the cylindrical member to the base member between at least one of the first cylindrical member and the base member or between the second cylindrical member and the base member. The gas generator according to any one of claims 1 to 4, wherein the gas generator is arranged. Filling the gas generating agent into the space inside the first cylindrical member having a bottomed cylindrical shape having an opening at one end and a bottom at the other end;
Inserting a filter into the space inside the first tubular member through the opening;
A closing member is attached to the one end of the first cylindrical member so as to close the opening, thereby sealing the space inside the first cylindrical member containing the gas generating agent and the filter. And a process of
Filling the gas generating agent into the space inside the bottomed cylindrical second cylindrical member having an opening at one end and a bottom at the other end, and the opening;
Inserting a filter into the space inside the second cylindrical member through the opening;
A closing member is attached to the one end of the second cylindrical member so as to close the opening, thereby sealing the space inside the second cylindrical member containing the gas generating agent and the filter. And a process of
The base so that the first opening of the base member having the first opening and the second opening communicating with the space provided inside is closed by the bottom of the first tubular member after sealing. Attaching the first tubular member after sealing to the member;
Attaching the second cylindrical member after sealing to the base member such that the second opening of the base member is closed by the bottom of the second cylindrical member after sealing;
Filling the space of the base member with a transfer charge;
And a step of mounting an igniter in the space of the base member.

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