JP2009019989A - Jig for measuring joining strength of inflater parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide inflater parts fixing method for measuring the mutual jointing strength of inflater parts. <P>SOLUTION: A cylindrical part 31 becoming a measuring target and chucks 41 and 42 are arranged in the outer frame 11 having mutually opposed inclined surfaces 13 and 14. The blades 43 and 44 of the chucks 41 and 42 are bit in the peripheral surface of the cylindrical part 31 by the action for pushing down the cylindrical part 31. The cylindrical part 31 is fixed without being deformed by the biting of the blades 43 and 44 in the cylindrical part 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a jig for measuring the bonding strength of an inflator component used for measuring the bonding strength between components of an inflator, and a method for fixing an inflator component to be measured using the measuring jig.

  Some inflators used in automobile airbag devices utilize pressurized gas as an inflation medium. In these inflators, the pressure vessel is filled with gas at high pressure. However, since the pressure vessel is usually welded and integrated with other components, it is important that the gas does not leak from the welded portion.

  An inflator used in an automobile airbag device needs to be sealed within the bottle for the life of the vehicle (for example, 10 years). The weld strength (joint strength) of the part is inspected.

  When testing the welding strength, a force is applied to fix one of the two parts and pull the other part away from the other. However, if one of the parts is not fixed enough, the accurate evaluation of the joining force cannot be performed. .

As a method for fixing one of the components, as shown in FIG. 1 of Patent Document 1, a method such as using a clamp and fastening with a strong force from the outside can be considered. There may be a case where distortion occurs in itself and it becomes impossible to grasp an accurate bonding force.
JP-A-7-233629

  An object of the present invention is to provide a measuring jig used for fixing an inflator component when measuring the bonding strength of the inflator component, and a fixing method for the inflator component using the same.

The invention of claim 1 is a solution to the problem.
An inflator comprising: an outer frame; a holder that is detachably attached to the outer frame, and that temporarily holds a measurement object; and two chucks that are attached to the outer frame and fix the measurement object. It is a jig used to measure the joint strength between cylindrical parts,
The outer frame is open at the upper side during use, and at least a part of the lower side is open. At least two opposing wall surfaces are inclined surfaces that narrow toward the lower opening during use. Yes,
The holder is capable of temporarily holding the measurement object in the outer frame in a stage before the measurement object is fixed by the two chucks;
The two chucks are plate-like ones whose back side wall surface can come into contact with the inclined surface of the outer frame, and whose front side wall surface can come into contact with the object to be measured. A measuring jig is provided.

The invention of claim 2 is a solution to the problem.
An outer frame, two holders that are detachably attached to the outer frame and temporarily hold a measurement object, and two chucks that are attached to the outer frame and fix the measurement object. It is a jig used to measure the bonding strength between cylindrical parts of inflators,
The outer frame is opened at the upper side during use, and the lower side is at least partially opened.
The two holders have inclined surfaces whose opposing surfaces are narrowed toward the lower opening of the outer frame, and in a stage before the measurement object is fixed by the two chucks, The measurement object can be temporarily held in the outer frame,
The two chucks are plate-like ones whose back side wall surface can come into contact with the inclined surface of the holder, and whose front side wall surface can come into contact with the object to be measured. A measuring jig is provided.

The invention of claim 3 is a means for solving other problems.
A fixing method for measuring the bonding strength between cylindrical parts of an inflator using the measurement jig according to claim 1,
Attaching the retainer to the outer frame,
Holding the joined cylindrical part to be measured by the holder;
Two chucks are fitted into two opposing inclined surfaces of the outer frame in a state where the inclined wall surfaces on the back side are applied, and each of the blades on the front side wall surface of the two chucks is attached to the cylindrical part. Contacting the peripheral surface,
After removing the holder, the cylindrical part is pushed in from above, the blade of the front side wall surface is bited into the peripheral surface of the cylindrical part, and the cylindrical part is fixed by the two chucks,
A fixing method is provided.

The invention of claim 4 is a means for solving other problems.
A fixing method for measuring the bonding strength between cylindrical parts of an inflator using the measuring jig according to claim 2,
Attaching the retainer to the outer frame,
Holding the joined cylindrical part to be measured by the holder;
Two chucks are fitted to two opposing inclined surfaces of the holder while the respective inclined wall surfaces on the back side are applied, and each of the blades on the front side wall surface of the two chucks is attached to the cylindrical part. Contacting the peripheral surface,
Pushing the cylindrical part from above with the holder fitted in, causing the peripheral part of the cylindrical part to bite the blade of the front side wall surface, and fixing the cylindrical part by the two chucks;
A fixing method is provided.

  By fixing the inflator component using the measuring jig of the present invention, the bonding strength can be measured easily and accurately.

  The fixing method using the measurement jig of the present invention is, for example, the joining of the joint 649 between the pressurized gas chamber housing 622 and the gas generator housing 632 in FIG. 1 of Japanese Patent Application Laid-Open No. 2003-226222. It can be used to measure the strength and joint strength of the joint 654 resistance-welded between the pressurized gas chamber housing 622 and the diffuser portion 650.

  When measuring the joint strength of these joints 649 and 654, for example, the pressurized gas chamber housing 622 is fixed and the gas generator housing 632 or the diffuser part 650 is pulled (or the gas generator housing 632). Alternatively, the bonding strength is measured by pressing the diffuser section 650.

(1) First Embodiment Hereinafter, referring to FIGS. 1A to 1D and 2, a cylindrical part using the measurement jig of the present invention, which is applied when measuring such bonding strength. The fixing method will be described.

  1A to 1D are cross-sectional views showing the procedure of the fixing method, and FIG. 2 is a plan view of FIG.

<Fig. 1 (a)>
In the first stage, the holder 21 is attached to the outer frame 11 as shown in FIG. The outer frame 11 is fixed to a measuring instrument for bonding strength, or is separately fixed in the air by appropriate support means.

  The outer frame 11 is open on the upper side (upper side in FIG. 1) in use, and at least a part of the lower side is opened (opening 12). It has an inclined surface that narrows to the side.

  The holder 21 has a wall surface 23 surrounding the bottom surface 22 and the four sides (or may be only two wall surfaces facing each other), and is formed at the center of the bottom surface 22 with a cylindrical member 24 protruding. A cylindrical space 25 is formed inside. The center line of the cylindrical space 25 coincides with the center line of the opening 12.

  The holder 21 can be detachably attached to the outer frame 11. As a method of making it detachable, for example, a method of fitting or hooking a projection (or a hook) formed on the inner wall surface of the holder 21 into a groove or a hole formed on the outer peripheral surface of the outer frame 11, Appropriate methods such as a method in which a hole formed in the wall surface of the outer frame 11 and a hole formed in the wall surface of the holder 21 are coupled with a bolt and a nut, or a method using a magnet can be applied.

<Fig. 1 (b)>
In the second stage, the cylindrical part 31 to be measured is inserted through the opening 12 so that the part 33 is located in the cylindrical space 25. The cylindrical part 31 is obtained by resistance-welding two parts 32 and 33 at the joint 34. The part 32, the part 33, and the joining part 34 correspond to the pressurized gas chamber housing 622, the gas generator housing 632, or the diffuser part 650, the joining part 649, or the joining part 654 in FIG. 1 of JP-A-2003-226222, respectively. .

  By this second stage, one end surface and a part of the peripheral surface of the cylindrical part 31 are held, and the cylindrical part 31 is fixed at a predetermined position and a predetermined height.

<Fig. 1 (c)>
In the third stage, the two chucks 41, 42 are fitted into the two inclined surfaces 13, 14 of the outer frame 11 facing the inclined wall surfaces 41 a, 42 a on the back side, respectively. , 42 are brought into contact with the peripheral surface of the part 32 of the cylindrical part 31.

  When fitting the two chucks 41, 42, the respective inclined wall surfaces 41 a, 42 a are fitted so as to be slid in a state where they are in contact with the two inclined surfaces 13, 14 opposed to the outer frame 11.

  A plurality of blades 43 of the chuck 41 and a plurality of blades 44 of the chuck 42 are formed. The number, shape, and formation position of the blades 43 and 44 are not particularly limited, but as shown in the drawing, it is preferable that the tip portion is directed obliquely upward (in the direction of the upper opening of the outer frame 11). . The blades 43 and 44 have a semicircular planar shape as shown in FIG. 2 and surround the cylindrical member 31, but have a planar shape as shown in FIG. 3 and sandwich the cylindrical member 31 from both sides. But you can.

  In the third stage, the blades 43 and 44 and the peripheral surface of the component 32 remain in light contact with each other.

<FIG. 1 (d), FIG. 2>
In the fourth stage, after removing the holder 21, the cylindrical part 31 is pushed in from above. As a method of pushing in at this time, in addition to a method of pushing from above as shown in FIG. 5A, a method of pulling from below as shown in FIG. 5B can be applied. When pushed in this way, the blades 43, 44 of the chucks 41, 42 bite into the peripheral surface of the component 32, and the chucks 41, 42 move downward along the inclined surfaces 13, 14 together with the component 32. Thereby, since the two chucks 41 and 42 come closer to each other, the blades 43 and 44 bite deeper. In this way, the component 32 is firmly fixed by the two chucks 41 and 42.

(2) Second Embodiment Next, another embodiment will be described. FIG. 3 (a) shows the same stage as FIG. 1 (c), and FIG. 3 (b) shows the same stage as FIG. 1 (d). The number of each element in FIG. 3 is obtained by changing each number in FIG. 1 and FIG. 2 to the 100s, and the corresponding numbers (for example, 13 and 113, 14 and 114) are the same. means. Hereinafter, the procedure from the first stage to the fourth stage will be described with reference to FIG.

<First stage>
In the first stage, a holder (not shown) is attached to the outer frame 111 in the same manner as in FIG.

  The outer frame 111 is open on the upper side during use, and at least a part is opened on the lower side, and two opposing wall surfaces 113 and 114 are inclined surfaces that narrow toward the lower opening. .

<Second stage>
In the second stage, similarly to FIG. 1B, the cylindrical part 131 to be measured is held by the holding tool so as to be in a predetermined position through the lower opening. The cylindrical part 131 is obtained by resistance-welding two parts at the joint similarly to the cylindrical part 31.

  By this second stage, one end surface and a part of the peripheral surface of the cylindrical part 131 are held, and the cylindrical part 131 is fixed at a predetermined position and a predetermined height.

<Third stage; FIG. 3 (a)>
In the third stage, two chucks 141 in a state where the inclined wall surfaces 141a and 142a on the back side are applied to the two inclined surfaces 113 and 114 (see FIG. 3B) of the outer frame 111 facing each other. 142 is inserted.

  As shown in FIG. 3A, the two chucks 141 and 142 have a substantially L-shaped planar shape, and the blades 143 and 144 are provided only on one side facing each other with the cylindrical part 131 interposed therebetween. Have. The blades 143 and 144 are formed so as to be able to bite into the cylindrical part 131 when the chucks 141 and 142 move.

  When fitting the two chucks 141 and 142, the respective inclined wall surfaces 141a and 142a are fitted so as to be slid in a state where they are in contact with the two inclined surfaces 113 and 114 facing each other.

  In the third stage, when the two chucks 141 and 142 are fitted, the peripheral surfaces of the blades 143 and 144 and the cylindrical part 131 remain in light contact with each other.

<Fourth stage, FIG. 3B>
In the fourth stage, after removing the holder, the cylindrical part 131 is pushed in from the top in the same manner as in the first embodiment. At this time, the chucks 141 and 142 slide on the inclined surfaces 113 and 114 and move as indicated by arrows in FIG. 3A to reach the state shown in FIG. 3B from the state shown in FIG. . Then, the blades 143 and 144 of the chucks 141 and 142 bite into the peripheral surface of the cylindrical part 131, and the cylindrical part 131 is fixed.

(3) Third Embodiment Next, another embodiment will be described. 4A shows the same stage as FIG. 1A, and is a cross-sectional view of a state in which the holder is attached to the outer frame (however, only the outer frame is a cross-sectional view and the holder is a front view), FIG. (B) shows the same stage as FIG.1 (c), FIG.4 (c) has shown the same stage as FIG.1 (d). The number of each element in FIG. 4 is obtained by changing each number in FIG. 1 and FIG. 2 to the 200s, and the corresponding numbers (for example, 13 and 213, 14 and 214) are the same. means. Hereinafter, the procedure from the first stage to the fourth stage will be described with reference to FIG.

<First stage>
In the first stage, as shown in FIG. 4A, the two holders 221 and 222 are attached in the outer frame 211 using fixing means such as bolts.

  The outer frame 211 has an opening (opening 212) on the upper side during use, and at least a part of the opening (opening 213) on the lower side.

  The holder 221 has a hanging surface 223a and an inclined surface 223b, and the holder 222 has a hanging surface 224a and an inclined surface 224b. The inclined surface 223b and the inclined surface 224b are inclined surfaces that narrow in the direction toward the opening 213, and face the diagonal direction of the outer frame 211. The inclined surface 223b and the inclined surface 224b may be formed on the outer frame 211.

<Second stage>
In the second stage, similarly to FIG. 1B, the peripheral surface of the cylindrical part 231 to be measured is held by the holders 221 and 222 so as to be in a predetermined position. Note that the lower end surface of the cylindrical part is supported by using a holder such as the holder 21 in FIG. 1 separately, or directly on the base of the measuring machine or on an appropriate work table. The cylindrical part 231 is formed by resistance welding of two parts at the joint similarly to the cylindrical part 31.

  By this second stage, one end surface and a partial circumferential surface of the cylindrical part 231 are held, and the cylindrical part 231 is fixed at a predetermined position and a predetermined height.

<Third stage: FIG. 4B>
In the third stage, the two chucks 241 and 242 are fitted into the two inclined surfaces 223b and 224b of the holders 221 and 222 which are opposed to the inclined wall surfaces 241a and 242a on the back side. .

  The two chucks 241 and 242 have blades 243 and 244 only on one side facing each other with the cylindrical part 231 interposed therebetween. The blades 243 and 244 are formed so that they can bite into the cylindrical part 231 when the chucks 241 and 242 move.

  When the two chucks 241 and 242 are fitted, the respective inclined wall surfaces 241a and 242a are fitted so as to slide in a state where the two inclined surfaces 223b and the inclined surface 224b of the holders 221 and 222 are opposed to each other. Include.

  In the third stage, when the two chucks 241 and 242 are fitted, the peripheral surfaces of the blades 243 and 244 and the cylindrical part 231 remain in light contact with each other.

<Fourth stage, FIG. 4B>
In the fourth stage, the tubular part 231 is pushed in from above in the same manner as in the first embodiment while the whole is pulled up and held in the air. At this time, the chucks 241 and 242 slide and move on the inclined surfaces 223b and 224b to reach the state shown in FIG. 4C from the state shown in FIG. Then, the blades 243 and 244 of the chucks 241 and 242 bite into the peripheral surface of the cylindrical part 231 and the cylindrical part 231 is fixed.

<Measurement method of bonding strength of inflator parts>
The measurement of the bonding strength of the inflator component is performed by fixing the cylindrical component to be measured by any one of the above-described first to third embodiments, and then FIG. A load is applied until the joining state at the joint 34 shown in FIG. The bonding strength is measured by measuring this load with a load sensor or the like. The specific measurement method differs depending on the form of the cylindrical part.

  For example, as shown in FIG. 5A, when the cylindrical part 31 is a part 33 having a part 32 and a flange 33a and is resistance-welded at the joint 34, the measuring tool 50 presses the flange 33a from above. Thus, the bonding strength is measured.

  For example, as shown in FIG. 5B, when the cylindrical part 31 is a part 32 and a part 33 resistance-welded at the joint 34, the joint strength is measured by pulling the part 33 downward. .

Explanatory drawing of the procedure (a)-(d) of the fixing method using the jig | tool for a measurement of this invention. The top view of the procedure (d) shown in FIG. Explanatory drawing which shows the procedure of the fixing method using the other jig | tool for measurement of this invention. Explanatory drawing which shows the procedure of the fixing method using the still another measuring jig of this invention. Explanatory drawing of the measuring method of the joint strength of components.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Outer frame 13, 14 Inclined surface 21 Holder 31 Cylindrical component 41, 41 Chuck 41a, 42a Inclined wall surface 43, 44 Blade

Claims (4)

An inflator comprising: an outer frame; a holder that is detachably attached to the outer frame, and that temporarily holds a measurement object; and two chucks that are attached to the outer frame and fix the measurement object. It is a jig used to measure the joint strength between cylindrical parts,
The outer frame is open at the upper side during use, and at least a part of the lower side is open. At least two opposing wall surfaces are inclined surfaces that narrow toward the lower opening during use. Yes,
The holder is capable of temporarily holding the measurement object in the outer frame in a stage before the measurement object is fixed by the two chucks;
The two chucks are plate-like ones whose back side wall surface can come into contact with the inclined surface of the outer frame, and whose front side wall surface can come into contact with the object to be measured. A measuring jig. An outer frame, two holders that are detachably attached to the outer frame and temporarily hold a measurement object, and two chucks that are attached to the outer frame and fix the measurement object. It is a jig used to measure the bonding strength between cylindrical parts of inflators,
The outer frame is opened at the upper side during use, and the lower side is at least partially opened.
The two holders have inclined surfaces whose opposing surfaces are narrowed toward the lower opening of the outer frame, and in a stage before the measurement object is fixed by the two chucks, The measurement object can be temporarily held in the outer frame,
The two chucks are plate-like ones whose back side wall surface can come into contact with the inclined surface of the holder, and whose front side wall surface can come into contact with the object to be measured. A measuring jig. A fixing method for measuring the bonding strength between cylindrical parts of an inflator using the measurement jig according to claim 1,
Attaching the retainer to the outer frame,
Holding the joined cylindrical part to be measured by the holder;
Two chucks are fitted into two opposing inclined surfaces of the outer frame in a state where the inclined wall surfaces on the back side are applied, and each of the blades on the front side wall surface of the two chucks is attached to the cylindrical part. Contacting the peripheral surface,
After removing the holder, the cylindrical part is pushed in from above, the blade of the front side wall surface is bited into the peripheral surface of the cylindrical part, and the cylindrical part is fixed by the two chucks,
Having a fixing method. A fixing method for measuring the bonding strength between cylindrical parts of an inflator using the measuring jig according to claim 2,
Attaching the retainer to the outer frame,
Holding the joined cylindrical part to be measured by the holder;
Two chucks are fitted to two opposing inclined surfaces of the holder while the respective inclined wall surfaces on the back side are applied, and each of the blades on the front side wall surface of the two chucks is attached to the cylindrical part. Contacting the peripheral surface,
Pushing the cylindrical part from above with the holder fitted in, causing the peripheral part of the cylindrical part to bite the blade of the front side wall surface, and fixing the cylindrical part by the two chucks;
Having a fixing method.

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