JP2003181928A - Structure for confirming quality of vibration fusion bonding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and visually confirm whether the fusion bonding degree due to vibration fusion bonding is well. <P>SOLUTION: A through-hole 34 piercing from a joining surface 22 to the back side is bored in an insert member 20, and a first reference surface 30 is provided to the peripheral edge of the opening on the back side of the through-hole 34. A boss 36 capable of being correspondingly inserted into the through-hole 34 is provided to the joining surface 16 of a panel substrate material 12, and a second reference surface 32 is provided to the leading end of the boss 36. When the insert member 20 and the panel substrate material 32 are fusion-bonded under vibration, the boss 36 is inserted into the through-hole 34 to allow the second reference surface 32 to correspondingly face to the first reference surface 30. By this constitution, the displacement quantity of the second reference surface 32 to the first reference surface 30 can be visually confirmed before and after vibration fusion bonding, and the quality of the fusion bonding degree can be confirmed simply. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for confirming the quality of vibration welding, and more particularly to a structure for confirming whether or not a first member made of a resin material and a second member made of a resin material are mutually welded by vibration welding. The present invention relates to a structure for easily confirming the quality of welding.

[0002]

2. Description of the Related Art Vehicles manufactured in recent years are equipped with an airbag device for a driver's seat passenger and an airbag device for a passenger's passenger as standard equipment in order to protect an occupant from an impact such as a collision accident. There is. An airbag device for a driver's occupant is generally installed in a horn pad portion of a steering wheel, and an airbag device for a passenger's occupant is stored in an instrument panel as a vehicle interior member mounted in front of a passenger compartment. ing. Therefore, the instrument panel is provided with an airbag door at a portion corresponding to the airbag device for the passenger seat occupant, and the occupant receives a pressing force of the airbag that has started to expand when the airbag device is activated. It will open to the room side.

The instrument panel is mainly composed of a synthetic resin panel base material which is injection-molded into a required shape, and is a single layer type composed only of the panel base material, and a skin material is attached to the outer surface of the panel base material. It is roughly classified into a two-layer type, a three-layer type in which a skin material is attached to the outer surface of a panel base material through a cushion material, and the like. Here, the panel base material is formed of a relatively hard resin material such as PP (polypropylene) or ASG on the premise of the purpose of use of an instrument panel on which various in-vehicle devices are mounted. Therefore, it is formed integrally with the panel substrate,
The airbag door, which always constitutes a part of the panel base material, has a fear of being damaged or scattered by its impact, especially when a strong pressing force of the airbag is applied at a low temperature,
The problem is inherent from a strength and safety standpoint. Therefore, as shown in FIG. 11, the instrument panel 10
The insert member 20 for connecting and supporting the panel base material 12 and the airbag device 26 is joined to the back surface of the airbag door 14 provided on the panel base material 12, and the airbag door 14 provided on the panel base material 12 is joined. Also, measures are taken to prevent damage and scattering of the surrounding area.

The insert member 20 has been mainly made of metal molding in the past, but in recent years, for example, in order to reduce the weight, reduce the cost, and improve the recyclability, for example, an olefin-based thermoplastic elastomer is used. (T
It is a molded member made of a synthetic resin such as PO) (Fig. 12). Therefore, the panel base material 1 made of a resin material
In many cases, the 2 (airbag door 14) and the resin-made insert member 20 are welded to each other based on a known vibration welding technique on the assumption that they are compatible with each other. Here, the term "vibration welding" means a site where the panel base material 12 and the insert member 20 are to be joined using a vibration welding machine (not shown).
(Joining surfaces 16 and 22) are brought into contact with each other, and the respective members 12,
When the insert member 20 is vibrated in the horizontal direction while the member 20 is pressed with a required pressing force, the joining surfaces 16 and 22 are melted by the frictional heat generated in the joining surfaces 16 and 22 of both members 12 and 20. It is to bond while doing.

[0005]

By the way, the welding strength when the panel base material 12 of the instrument panel 10 and the insert member 20 are vibrationally welded is basically the welding area of both members 12, 20. Although it depends on the (welding amount), the welded joint surfaces 16 and 22 are not exposed to the outside and therefore cannot be directly visually inspected, and there is an inherent problem that the quality of the weld cannot be easily confirmed. Was there. That is, the quality of welding of the insert member 20 and the panel base material 12 is determined by applying an appropriate external force in the inspection process performed after the vibration welding work is completed.
There was no choice but to confirm whether 0 peeled off.

However, since it is impossible to confirm the quality of the above-mentioned welding in all the instrument panels 10, it is actually necessary to carry out a vibration welding test in advance to obtain the optimum welding conditions, and then to determine the optimum welding conditions. By virtue of the vibration welding of the panel base material 12 and the insert member 20, it is considered that the welding degree of both the members 12 and 20 is considered to be good, and the welding state is managed only under the welding conditions. I didn't. However, in such a management mode, even if there is something in which the degree of welding (welding strength) does not reach the reference value or the like sufficiently, it is inevitable that a defective product will flow out because it cannot be checked. It cannot be prevented. On the other hand, all instrument panels 1
In the case where the above-mentioned confirmation of the degree of welding is performed with respect to 0, it takes a lot of time for the confirmation work for each panel 10, so that there is a problem that the overall work efficiency is lowered.

On the other hand, as shown in FIG. 13 (a), when a grid-shaped rib (melting margin) 24 is projected from the joining surface 22 of the insert member 20, the rib 24 is melted and crushed. It is known that the welded metal can move to both sides to improve the welding strength. However, as shown in FIG. 13A, when the ribs 24 come into contact with the panel base material 12, air remains in the recesses and is confined. Moreover, as shown in FIG. 13 (b), the ribs 24 are crushed and moved to both sides to reduce the volume of each recess, so that the air remaining in each recess is sealed in a compressed state. Will be. For this reason, in some cases, as shown in FIG. 14, the joint portion between the panel base material 12 and the insert member 20 is peeled off, and an appropriate welding strength cannot be obtained.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the above-mentioned prior art, and is proposed in order to suitably solve the problems. By vibrating and welding members made of resin materials are welded to each other. It is an object of the present invention to provide a vibration welding quality confirmation structure capable of easily visually confirming whether or not the welding state is good.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the intended purpose, the present invention is directed to the case where a first member made of a resin material and a second member made of a resin material are welded to each other by vibration welding. In the structure for confirming the quality of the welding, at least one of the first member and the second member is provided with a confirmation hole penetrating from the joint surface of the member to the back side, When the first member and the second member are vibration-welded, the amount and the form of the molten resin protruding from the joint surface to the opening edge of the confirmation hole can be visually confirmed through the confirmation hole, so that the welding degree is good or bad. It is characterized in that it is configured to be able to confirm.

Similarly, in order to solve the above problems and achieve the intended purpose, another invention is to weld a first member made of a resin material and a second member made of a resin material to each other by vibration welding. A structure for confirming the quality of a degree, comprising: a first reference surface provided on the first member or the second member; and a second reference surface provided on the second member or the first member, before and after welding of both members. A second reference surface positioned corresponding to the first reference surface, the first reference surface relative to the first reference surface before vibration welding the first member and the second member and after performing the vibration welding. (2) It is characterized in that the displacement amount of the reference surface can be visually measured so that the quality of the welding can be confirmed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a vibration welding quality confirmation structure according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. The structure for confirming the quality of vibration welding according to the present invention can be adopted for all members that are compatible and can be vibration welded. However, in the embodiment, the insert member 20 is used as the first member made of a resin material. And the panel base material 12 of the instrument panel 10 as the second member made of a resin material. Therefore, the same members and parts as those already mentioned in the section of the prior art will be described with the same reference numerals.

[0012]

[First Embodiment] As shown in FIGS. 1 to 4, the vibration welding quality confirmation structure according to the first embodiment is a resin material insert member 20 molded from an olefinic thermoplastic elastomer (TPO) or the like. The first reference surface 30 provided on the first reference surface 30 and the first reference surface 30 provided on the panel base material 12 made of a resin material molded from PP (polypropylene), ASG, etc. before and after welding of both members 12, 20. The second reference plane 32 correspondingly located. Then, when vibration welding the insert member 20 and the panel base material 12,
The second member 20 with respect to the first reference surface 30 before and after the vibration welding of both members 20 and 12 is performed.
By making it possible to visually measure the displacement amount of the reference surface 32, it is possible to easily confirm the quality of the welding degree.

The insert member 20 includes the member 20.
A plurality (4 in the embodiment
(Individual) insertion holes 34 are formed at required positions at appropriate intervals. Then, the first reference surface 30 is provided at the opening peripheral edge on the back side of each of the insertion holes 34. In addition, in the embodiment, the insertion hole 34 having an opening rectangular shape is exemplified, but
The shape of the opening is not limited to this.

The panel substrate 12 (airbag door 14)
A plurality of (four in the embodiment) boss portions 36 projecting from the joint surface 16 of the base material 12 are provided in the respective insertion holes 34.
Corresponding to, and projectingly provided, and can be inserted into the insertion hole 34. The second reference surface 32 is provided at the tip (top surface) of each boss portion 36. In the embodiment, the prismatic boss portion 36 corresponding to the insertion hole 34 is illustrated, but the shape is not limited to this and is set on the assumption of the shape of the insertion hole 34. In addition, the boss portion 36 is set to a size and shape that can be inserted into the corresponding insertion hole 34 in a loosely fitted state in which an appropriate gap is defined, so that the vibration of the insert member 20 is hindered during vibration welding. There is no such thing.

In the welding confirmation structure of the embodiment thus constructed, when the insert member 20 is set on the back side of the panel base material 12 (airbag door 14), the respective boss portions 36 correspond to the respective corresponding boss portions 36. It is inserted in alignment with the insertion hole 34. Then, before the vibration welding in which the grid-shaped ribs 24 provided on the joint surface 22 of the insert member 20 are in contact with the back surface of the panel substrate 12, the second reference surface 32 provided on each boss portion 36 is the first reference surface 32. It comes to correspond to the surface 30
(Figure 5). At this time, in the aspect of the embodiment, the boss portion 36 is appropriately set to project from the back surface of the insert member 20, and the first reference surface 30 and the second reference surface 32 before vibration welding are set.
The surface step size between and is A.

On the other hand, when the insert member 20 is vibrated by using a vibration welding machine (not shown), the ribs 24 formed on the joint surface 22 are gradually melted and crushed by frictional heat, and the thickness of the insert member 20 is reduced. Becomes relatively thin. Therefore, at the time when the vibration welding work is completed, the protrusion amount of the boss portion 36 is increased by the thickness of the insert member 20, so that the first reference surface 30 and the second reference surface 30 after the vibration welding are completed. The surface step size with 32 comes to change to B (FIG. 6).

Therefore, the surface step size before and after welding (BA)
Therefore, if this displacement amount (numerical value) is used as an alternative value for determining the quality of the welding degree, the welding degree can be appropriately and easily confirmed. That is, the larger the displacement amount, the larger the melting amount of the ribs 24 and the wider the welding area, which means that the welding strength increases. As a result, the displacement amount when the desired welding strength is obtained is set to the reference displacement amount C.
If the displacement amount measured after the end of the vibration welding work is D, the reference displacement amount C
When ≦ measured displacement amount D, it can be judged that the welding degree is good (appropriate), and when reference displacement amount C> measured displacement amount D, it can be judged that the welding degree is bad (inappropriate). ,
It is possible to easily confirm the quality of welding.

As described above, in the vibration welding quality confirmation structure according to the first embodiment, when the insert member 20 and the panel base material 12 are vibration-welded, both members 12 and 20 are vibration-welded and before the vibration welding. By making it possible to visually measure the displacement amount of the second reference surface 32 with respect to the first reference surface 30 after and after performing, it is possible to easily confirm the quality of the welding degree.

Further, in the insert member 20 of the embodiment, as shown in FIGS. 1 to 6, a plurality of ventilation holes 38 penetrating from the joint surface 22 of the member 20 to the back side are formed in the grid-shaped ribs 2.
Each of the recesses defined by 4 is bored. As a result, when the insert member 20 and the panel base material 12 are vibration-welded, the air trapped in each of the recesses due to the ribs 24 coming into contact with the panel base material 12 passes through the ventilation holes 38 and is inserted into the insert member. It can be discharged to the back side of 20. Therefore, the ribs 24 melted by vibration welding are not crushed and prevented from moving to both sides, and peeling of the joint portion between the panel base material 12 and the insert member 20 is preferably avoided. .

In the first embodiment, the insertion hole 34 is formed in the insert member 20 which is the first member, and the insertion hole 3 is formed.
4 is provided with a first reference surface 30 at the periphery of the back side opening, and a boss portion 36 is projectingly provided on the panel base material 12 which is the second member.
Although an example in which the second reference surface 32 is provided at the tip of 6 is illustrated,
The first reference surface 30 may be provided on the panel substrate 12, and the second reference surface 32 may be provided on the insert member 20. That is, the panel substrate 12 is provided with the insertion hole 34, and the second reference surface 32 is provided at the peripheral edge of the back side opening of the insertion hole 34.
A boss portion 36 is provided on the insert member 20 so as to project from the boss portion 3.
Even if the second reference surface 32 is provided at the tip of 6, the second reference surface 32 with respect to the first reference surface 30 before and after the vibration welding of the insert member 20 and the panel base material 12 is performed. The amount of displacement can be visually measured, so that the quality of welding can be easily confirmed.

The relationship of the surface step between the first reference surface 30 and the second reference surface 32 is not limited to the aspect of the first embodiment. For example, as shown in FIG. 7, the second reference surface 32 at the tip of the boss portion 36 has a stepped shape including an upper reference surface 32a and a lower reference surface 32b, and the insert member 2
Before the vibration welding in which the grid-shaped ribs 24 provided on the joint surface 22 of 0 contact the back surface of the panel substrate 12, the second reference surface 32
The upper reference surface 32a of the second reference surface 32a is made to coincide with the first reference surface 30 (FIG. 7 (a)), and when the degree of welding is good by vibration welding, the lower reference surface 32b of the second reference surface 32 is First
A mode in which it matches the reference plane 30 may be used (see FIG. 7).
(b)). Even in this case, the amount of displacement of the second reference surface 32 with respect to the first reference surface 30 can be visually measured, whereby the quality of the welding degree can be easily confirmed.

In addition to this, for example, as shown in FIG.
Before the vibration welding in which the grid-shaped ribs 24 provided on the joint surface 22 of the insert member 20 are in contact with the back surface of the panel substrate 12, the length of the boss portion 36 is set so that the boss portion 36 does not protrude from the insertion hole 34. Is set (FIG. 8A), and the second reference surface 32 may be aligned with the first reference surface 30 when the degree of welding is improved by vibration welding (FIG. 8A).
(b)). Further, although not shown, before the vibration welding in which the grid-like ribs 24 provided on the joint surface 22 of the insert member 20 are in contact with the back surface of the panel base material 12, the second reference surface 32 is the first.
The length of the boss portion 36 may be set so as to match the reference surface 30, and the boss portion 36 may protrude from the insertion hole 34 by a required amount when the degree of welding is improved by vibration welding. .

[0023]

Second Embodiment As shown in FIG. 9 (a), the vibration welding quality confirmation structure according to the second embodiment is such that at least the first member, that is, the insert member 20, is joined to the joint surface 22 of the member 20.
The check hole 40 is formed so as to penetrate from the back side to the back side. Then, when the insert member 20 and the panel base material 12 are vibration-welded, the amount and the form of the molten resin P protruding from the space between the joint surfaces 16 and 22 of both members 12 and 20 to the opening edge of the confirmation hole 40, The quality of welding can be confirmed by making it visible through the confirmation hole 40. In the second embodiment, the confirmation hole 40 having an opening circular shape is illustrated (FIG. 10), but the opening shape is not limited to this.

In the quality confirmation structure of the second embodiment as described above, an insert member 2 is formed by using a vibration welding machine (not shown).
When 0 is vibrated, the ribs 24 formed on the joint surface 22
Is gradually melted and crushed by frictional heat (Fig. 10
(a)). At this time, when the rib 24 (24a) adjacent to the confirmation hole 40 at an appropriate interval is melted to some extent, a part of the molten resin P comes out to the opening edge of the confirmation hole 40 (see FIG. )), The amount of the molten resin P and the protruding mode can be visually observed through the confirmation hole 40.

Here, the quality criterion for the degree of welding that can be visually confirmed is, as an example, a good condition when the molten resin P uniformly protrudes from the entire opening edge (entire circumference) of the confirmation hole 40. As shown in FIG. 10 (a), when the molten resin P is unevenly protruding from a part of the opening edge of the confirmation hole 40, the intermediate defective state (FIG. 10 (b)) is obtained, and the molten resin P is It is conceivable that a case (1) is in a defective state (FIG. 10 (c)) when it hardly and / or at all protrudes from the opening edge of the confirmation hole 40. However, the quality of the welding is determined by the confirmation hole 40 and the rib 24 adjacent to the confirmation hole 40.
Depending on various conditions such as the distance from (24a) and the number of ribs 24 (24a) arranged, the amount and amount of protrusion of the welding resin P into the confirmation hole 40 at the time of appropriate welding change (for example, confirmation If the distance between the hole 40 and the rib 24 (24a) is large, the degree of welding can be good even if the amount of the molten resin P protruding into the confirmation hole 40 is small). Not something.

As described above, in the vibration welding quality confirmation structure according to the second embodiment, the confirmation hole 4 is formed after the vibration welding work is completed.
By visually observing the amount and mode of the molten resin P protruding to the opening edge of 0, it is possible to easily confirm the quality of the welding degree.

In the second embodiment, the confirmation hole 40 is provided in the insert member 20 which is the first member, but the confirmation hole 40 is provided in the panel substrate 12 which is the second member. May be. That is, even if the confirmation hole 40 is formed in the panel base material 12, the amount and mode of the molten resin P protruding from between the joint surfaces 16 and 22 to the opening edge of the confirmation hole 40 can be determined through the confirmation hole 40. It becomes visually observable, which allows easy confirmation of the quality of welding.

Incidentally, the insertion hole 34 in the first embodiment.
And the number of bosses 36 corresponding to the insertion holes 34,
The number and position of the confirmation holes 40 in the second embodiment are the same as those in the joint surface 2 between the insert member 20 and the panel substrate 12.
An appropriate number is set depending on the area of 2,16. And
By arranging the joining surfaces 22 and 16 at required intervals, it is possible to easily confirm the quality of the welding degree in the entire joining surfaces 22 and 16 by visually checking each.

[0029]

As described above, according to the vibration welding quality confirmation structure of the present invention, at least the first member or the second member is provided with the confirmation hole, so that the vibration welding operation is completed after the completion of the vibration welding operation. By making it possible to visually check the amount and the form of the molten resin protruding to the opening edge of the confirmation hole, it is possible to easily confirm the quality of the welding, which is a beneficial effect.

According to another aspect of the invention, which is a structure for confirming the quality of vibration welding, the first member and the second member having the first reference surface are provided.
When the second member provided with the reference surface is vibration-welded, the displacement amount of the second reference surface with respect to the first reference surface can be visually measured before the vibration welding of both members and after the vibration welding. By doing so, there is a beneficial effect that the quality of welding can be easily confirmed.

Further, by forming a vent hole in either the first member or the second member, the air existing between the joint surfaces of the two members can be suitably discharged to ensure reliable welding of the respective members. There are also possible advantages.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a panel base material and an insert member of an instrument panel having a vibration welding quality confirmation structure according to a first embodiment of the present invention in a vibration welded state.

2 is a cross-sectional view showing the panel member and the insert member shown in FIG. 1 in a state before vibration welding.

FIG. 3 is a schematic perspective view showing a state in which a panel member and an insert member are vibration-welded, partially broken.

FIG. 4 is a through hole formed in the insert member, a first reference surface provided on the periphery of the back opening edge of the through hole, a boss portion projecting from the panel base material, and a boss portion provided at the tip of the boss portion. It is a schematic perspective view which shows a 2nd reference plane.

FIG. 5 is a cross-sectional view showing a positional relationship (surface step) between a first reference surface and a second reference surface before vibration welding of an insert member and a panel base material.

FIG. 6 is a cross-sectional view showing a positional relationship (surface step) between a first reference surface and a second reference surface after vibration welding of an insert member and a panel base material.

FIG. 7 is a schematic cross-sectional view showing a modified example of the vibration welding quality confirmation structure according to the first embodiment, in which (a) is a first reference surface and a second reference surface before vibration welding of the insert member and the panel base material. The positional relationship between the reference planes is shown, and FIG. 6B shows the positional relationship between the first reference plane and the second reference plane after vibration welding of the insert member and the panel base material.

FIG. 8 is a schematic cross-sectional view showing another modified example of the quality confirmation structure for vibration welding according to the first embodiment, in which (a) is a first reference surface and a first reference surface before vibration welding of the insert member and the panel base material. The positional relationship between the two reference planes is shown, and (b) shows the positional relationship between the first reference plane and the second reference plane after vibration welding of the insert member and the panel base material.

FIG. 9 is a schematic cross-sectional view showing the structure for confirming the quality of vibration welding according to the second embodiment of the present invention, in which (a) shows a state where vibration welding of the insert member and the panel base material is started,
(b) shows a state where vibration welding of the insert member and the panel base material is completed.

10 is a view taken along the line XX of FIG. 9, in which (a) illustrates a good state of welding, (b) illustrates an intermediate poor state of the welding, and (c) shows welding. The defective state of the degree is illustrated.

FIG. 11 is a partial cross-sectional view of an instrument panel configured by vibration welding a panel member and an insert member.

12 is a cross-sectional view showing the panel member and the insert member shown in FIG. 11 in a state before vibration welding.

FIG. 13 is a schematic cross-sectional view showing a conventional mode in which a panel base material and an insert member are vibration-welded, where (a) shows a state where vibration welding of the insert member and the panel base material is started, and (b) shows Even if the vibration welding of the insert member and the panel base material is completed, the quality of the welding cannot be confirmed.

FIG. 14 is an explanatory cross-sectional view showing the inconvenience that the bonded surface is separated and reliable welding is not performed by the air trapped between the panel base material and the insert member.

[Explanation of symbols]

12 Panel base material (second member) 16 Bonding surface 20 Insert member (first member) 22 Bonding surface 30 First reference plane 32 Second reference plane 32a Upper reference plane 32b Lower reference plane 34 insertion hole 36 Boss 38 Vents 40 Confirmation hole

Continued front page    (72) Inventor Hiroaki Suzuki             Aichi Prefecture Anjo City Imaikecho 3 1-336 Stock             Inoac Corporation Anjo Business             In-house F-term (reference) 4F211 AD05 AD24 AH26 AM32 AP17                       TA01 TD14 TH02 TH17 TH18                       TH20 TJ30 TN20 TN78 TQ05                       TW39

Claims (6)

[Claims] 1. A structure for confirming whether or not the degree of welding is good when the first member (20) made of a resin material and the second member (12) made of a resin material are mutually welded by vibration welding. At least one of the first member (20) and the second member (12) is provided with a confirmation hole (40) penetrating from the joint surface (22, 16) of the member (20, 12) to the back side. When the vibration welding of the first member (20) and the second member (12) is performed, the amount and mode of the molten resin protruding from the joint surface (22, 16) to the opening edge of the confirmation hole (40) can be determined. A structure for confirming the quality of vibration welding, characterized in that the quality of the welding can be confirmed by making it visible through the confirmation hole (40). 2. A structure for confirming whether or not the degree of welding is good when the first member (20) made of resin and the second member (12) made of resin are welded to each other by vibration welding. A first reference surface (30) provided on the first member (20) or the second member (12) and both members (20, 20) provided on the second member (12) or the first member (20). The first reference surface (30) before and after welding of 12)
The second reference surface (32) positioned corresponding to the first reference surface (32), and the first member before the vibration welding of the first member (20) and the second member (12) and after the vibration welding. A quality confirmation structure for vibration welding, characterized in that the amount of displacement of the second reference surface (32) with respect to the reference surface (30) can be visually measured to confirm the quality of the welding. 3. The first member (20) or the second member (12)
And an insertion hole (34) penetrating from the joint surface (22, 16) of the member (20, 12) to the back side is provided, and the first reference surface (30) is provided at the periphery of the back side opening of the insertion hole (34). And a joint surface (22, 16) of the second member (12) or the first member (20)
A protruding boss (36) capable of being inserted into the insertion hole (34), and the second reference surface is provided at the tip of the boss (36).
(32) is provided, and when the first member (20) and the second member (12) are vibration-welded, the boss portion (36) is inserted into the insertion hole (34), so that the second reference The vibration welding quality confirmation structure according to claim 2, wherein the surface (32) faces the first reference surface (30) correspondingly. 4. The second portion at the tip of the boss portion (36)
The reference surface (32) has a stepped shape including an upper reference surface (32a) and a lower reference surface (32b), and the first member (20) and the second member (12)
Before the vibration welding of the above, the upper reference surface (32a) is the first reference surface.
The vibration according to claim 3, wherein the lower reference surface (32b) coincides with the first reference surface (30) when the welding degree is good due to vibration welding. Structure for confirming the quality of welding. 5. A ventilation hole (38) penetrating from one of the first member (20) and the second member (12) to the back side from the joint surface (22, 16) of the member (20, 12). When the first member (20) and the second member (12) are vibration-welded, the air trapped between the joint surfaces (22, 16) of both members (20, 12) is The vibration welding quality confirmation structure according to any one of claims 1 to 4, wherein the structure is discharged through the ventilation hole (38), whereby reliable welding of both members (20, 12) is achieved. 6. The first member (20) is a panel base material constituting an instrument panel for a vehicle, and the second member (12) is a back surface side of an airbag door provided on the panel base material. An insert member that is vibration-welded to
The quality confirmation structure for vibration welding according to any one of 5 above.