JP2014162174A - Vibrating welding part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mainly facilitate position-setting and prevent a position-setting part from being damaged.SOLUTION: A vibrating welding part structure is provided with a position-setting part 27 for setting a contacting position of a contacting face 35 to a junction face 34 between a welding substrate 31 and a welding component 32. A first position-setting part 27 provided erected at a first corner part 38 has a protruded part 41 for positioning attached near the outside part of the junction face 34, and a housing part 42 for positioning projecting to the outside from the contacting face 35. A second position-setting part 27 provided at a second corner part 39 has an engaging part 43 for positioning provided erected near the outside part of junction face 34 and engaged with a brim part of the contacting face 35.

Description

  The present invention relates to a vibration welded part structure that can facilitate position definition and prevent damage to a position defining part.

  In vehicles such as automobiles, vehicle interior panels such as instrument panels are installed in the front part of the vehicle interior.

  An air bag device for the passenger seat is installed in a portion on the passenger seat side of the instrument panel as a safety device for protecting the passenger in the passenger seat in an emergency (see, for example, Patent Document 1).

  The above-described airbag device for a passenger seat includes an airbag module that folds and stores a bag-like airbag body, and an airbag grid portion that is installed above the airbag module.

  The lower part of the airbag module is fastened and fixed to the vehicle body strength member disposed inside the instrument panel via a fastening member.

  Moreover, the upper part of the airbag module is attached to the back side of the airbag grid member via a resin reinforcing member. The resin reinforcing member is fixed to the back side of the air bag grid member by vibration welding or the like.

  Between the air bag grid member (welding base material) and the resin reinforcing member (welded part), a position defining portion for defining the position of both is provided.

JP 2008-265162 A

  However, in the vibration welded portion structure described in Patent Document 1, the configuration of the position defining portion described above is complicated, so that it takes time to work to position the air bag grid member and the resin reinforcing member. There was a problem.

  Further, even if the position defining portion is damaged during vibration welding, it is impossible to manage the fragments generated by the damage, and there has been a demand for a structure in which the position defining portion is not damaged.

In order to solve the above problem, the invention described in claim 1 is:
The welding base material and the welding component have a welding part joined by vibration welding that vibrates in one direction,
The welded portion has a joint surface set on the welding base material, and a contact surface provided on the welded part so as to be able to contact the joint surface,
The joint surface and the contact surface are each of a rectangular shape having a pair of side portions extending in a vibration direction of vibration welding and a pair of side portions extending in a direction orthogonal to the vibration direction,
In the vibration welded part structure provided with a position defining part for defining the contact position of the contact surface with respect to the joint surface between the welding base material and the welded part,
The position defining portion is provided in at least two locations so as to be positioned in a direction orthogonal to the vibration direction with respect to the diagonal position of the joint surface and the contact surface having a rectangular shape or the vicinity thereof,
The first position defining portion provided at the diagonal first corner portion,
A positioning protrusion erected in the vicinity of the outer portion of the joint surface;
A positioning accommodating portion that protrudes outward from the contact surface and can accommodate the protruding portion;
The second position defining portion provided at the diagonal second corner portion is erected in the vicinity of the outer portion of the joint surface to directly or indirectly lock the edge portion of the contact surface. It has the latching | locking part for positioning, It is characterized by the above-mentioned.
The invention described in claim 2 is the above,
The accommodating portion includes a loose hole portion through which the protruding portion is inserted with a slight gap with respect to the vibration direction, and
The accommodating portion has a position defining surface for defining the position of the protruding portion with respect to a direction orthogonal to the vibration direction.
The invention described in claim 3 is the above,
The accommodating portion has an inclined surface portion on the welding base material side of the loose hole portion, the base portion side of the projecting portion is widened and the tip end side of the projecting portion is narrowed with respect to the vibration direction. .
The invention described in claim 4 is the above,
The positioning accommodating portion has a thick portion for extending the loose hole portion on a side opposite to the welding base material.
The invention described in claim 5 is the above,
The positioning accommodating portion has a protruding edge portion protruding toward the welding base material around the loose hole portion, and an inner peripheral portion of the protruding edge portion is provided with the protruding portion to the receiving portion. It has the introduction taper part which guides introduction, It is characterized by the above-mentioned.
The invention described in claim 6 is the above,
The welding base material is an airbag grid member, and the welding component is a resin reinforcing member that is vibration welded to the back side of the airbag grid member.

According to the first aspect of the present invention, the following operational effects can be obtained by the above configuration.
That is, by providing at least two position defining portions at or near the diagonal position of the joint surface or the contact surface, the welding component can be placed on the welding base material in the vibration direction with a small number of position defining portions. In addition, the position can be effectively defined with respect to the direction orthogonal to the vibration direction and the rotation direction.
Further, by providing the first position defining portion and the second position defining portion on the outer side of the joint surface or the contact surface, it is not necessary to reduce the area (welded area) of the vibration welding portion. Compared with the case where the position defining portion is provided inside the joining surface or the contact surface, a stronger welding state can be obtained.
Then, by configuring the first position defining portion with the protruding portion and the accommodating portion, the operator can reliably perform the positioning operation by confirming that the protruding portion is accommodated in the accommodating portion. it can. In addition, since it is only necessary to check the housing state of the protruding portion and the housing portion at only one location of the first position defining portion, the position defining work is facilitated at each stage. Furthermore, the number of parts that can be damaged by vibration welding can be reduced to one.
In addition, by defining the second position defining portion as a locking portion that directly or indirectly locks the edge portion of the abutting surface, the position can be defined effectively and reliably with a simple configuration. Can be done. Moreover, since the locked state of the second position defining portion can be confirmed at the edge of the relatively large contact surface in the welded part, the positioning operation can be performed easily and reliably. Furthermore, the locking portion can be prevented from being damaged by vibration welding.
According to the second aspect of the present invention, the following effects can be obtained by the above configuration.
That is, the housing portion includes a loose hole portion through which the protruding portion is inserted with a slight gap with respect to the vibration direction, so that the angle at which the base portion of the protruding portion is bent during vibration welding is small. Can be small. As a result, it is possible to make the base portion of the protruding portion difficult to break.
In addition, since the housing portion has a position defining surface for defining the position of the protrusion with respect to the direction orthogonal to the vibration direction, the position can be reliably defined in the direction orthogonal to the vibration direction.
According to the third aspect of the present invention, the following operational effects can be obtained by the above configuration.
That is, in the case of vibration welding, the housing portion has an inclined surface portion on the welding base material side of the loose hole portion where the base portion side of the protruding portion becomes wider and the distal end side of the protruding portion becomes narrower with respect to the vibration direction. The angle at which the base of the protrusion is bent can be further reduced.
Further, since the position of the loose hole portion is separated from the welding base material in the direction perpendicular to the surface by the amount of the inclined surface portion, the angle at which the base portion of the protruding portion is bent during vibration welding is further reduced. be able to.
Accordingly, it is possible to prevent the protruding portion from being damaged due to bending deformation and the protruding portion from being separated and dropped due to the damage.
According to the invention described in claim 4, the following effects can be obtained by the above-described configuration.
In other words, by providing a thick portion on the opposite side of the welding base to the welding base and extending the loose hole to the opposite side, the length of the loose hole necessary for positioning is increased. Can be secured. As a result, as described above, positioning accuracy can be secured and improved while reducing the angle at which the base of the protruding portion is bent during vibration welding.
According to the fifth aspect of the present invention, the following effects can be obtained by the above configuration.
In other words, the positioning accommodating portion has an introduction taper portion on the inner peripheral portion of the protruding edge portion that protrudes toward the welding base material formed around the accommodating portion, so that a groping situation that cannot be directly observed from the outside. Even in this case, the guide is guided by the introduction taper portion, so that the projecting portion can be relatively easily inserted into the accommodating portion to determine the position. Thereby, the installation of the welding component with respect to the welding base material and the position defining operation can be facilitated.
According to the sixth aspect of the present invention, the following effects can be obtained by the above configuration.
That is, when the welding base material is an air bag grid member and the welded part is a resin reinforcing member, the position regulation described above is applied when the resin reinforcing member abuts on the back side of the air grid member and vibration welding is performed. The effect of facilitating the above and preventing the position defining portion from being damaged can be obtained.

It is a perspective view of the instrument panel provided with the vibration welding part structure concerning the Example of this invention. It is a longitudinal cross-sectional view of FIG. It is the top view which looked at the vibration welding part structure of FIG. 2 from upper direction. FIG. 4 is a partially enlarged view of FIG. 3. It is a partial expanded longitudinal cross-sectional view which shows the inclined surface part provided in the part of the loose hole part, (a) is a state when it exists in the amplitude center position during vibration welding, (b) exists in the maximum amplitude position during vibration welding. It shows the state of time. It is a partial enlarged longitudinal sectional view in the case of a tight hole portion, (a) shows a state at the position of the amplitude center during vibration welding, (b) shows a state at the maximum amplitude position during vibration welding. Is. It is a partial expanded longitudinal cross-sectional view which shows the thick part provided in the part of the loose hole part. It is the elements on larger scale which show the protruding edge part and introduction taper part which were provided in the part of the loose hole part.

  Hereinafter, the present embodiment and examples embodying the present embodiment will be described in detail with reference to the drawings.

  First, the configuration (vehicle airbag structure) serving as the background of this embodiment will be described with reference to FIGS.

  As shown in the figure, a vehicle interior panel such as an instrument panel 1 is installed in a front portion of a vehicle interior such as an automobile.

  And the airbag apparatus 2 for passenger seats is installed with respect to the passenger seat side part of this instrument panel 1 as a safety device for protecting a passenger seat passenger at the time of emergency.

  As shown in FIG. 2, the airbag device 2 for a passenger seat described above includes an airbag module 4 that folds and stores a bag-shaped airbag body 3, and an airbag installed above the airbag module 4. The grid member 5 is provided.

  The lower portion of the airbag module 4 is fastened and fixed to a vehicle body strength member 13 disposed inside the instrument panel 1 via fastening members 14 such as bolts and nuts.

  The upper portion of the airbag module 4 is attached to the back side of the airbag grid member 5 via a resin reinforcing member 15. The resin reinforcing member 15 will be described later.

  The above-described airbag grid member 5 is provided integrally with the above-described instrument panel 1 (so-called instrument-integrated lid), or provided separately from the instrument panel 1, and the instrument panel. There is a separate type (so-called instrument separate type lid) that can be attached to the lid mounting opening formed in 1 in a substantially flush state.

  Therefore, in the case of the integral type, the above-described airbag module 4 is directly attached to the inner surface of the instrument integrated lid (airbag grid member 5) portion of the instrument panel 1 (direct attachment type). . In the case of a separate type, the airbag module 4 is attached to the instrument panel 1 (indirectly) together with the separate instrument type lid while being attached to the inner surface of the separate instrument type lid (airbag grid member 5). (Indirect mounting type). In this case, it is an integrated type.

  And in this vehicle airbag structure, the door part for forming the opening part (opening part for expansion | swelling, not shown in particular) which the bag-shaped airbag main body 3 bulges with respect to the airbag grid member 5. 7,8 are provided. The door portions 7 and 8 are defined by a tear line 9 formed on the back side of the airbag grid member 5.

  The cleavage line 9 has at least a lateral cleavage line part 11 extending in the lateral direction and a pair of longitudinal cleavage line parts 12 extending to both sides in the longitudinal direction through both ends of the lateral cleavage line part 11. It is assumed to have a “day” shape when viewed from the bottom. The two door portions 7 and 8 can be formed between the lateral cleavage line portion 11 and the pair of vertical cleavage line portions 12 having a “day” shape as viewed from the bottom.

  Furthermore, a door outer portion 16 is formed outside the two door portions 7 and 8 described above. The door portions 7 and 8 described above are movable portions that open the opening portion described above by the operation of the airbag module 4, whereas the door outer portion 16 described above is a fixed portion that surrounds the outer periphery of the door portions 7 and 8. It is.

  The resin reinforcing member 15 is welded to at least the two door reinforcing portions 21 and 22 that are welded and fixed to the back surfaces of the door portions 7 and 8 and the back surface of the door outer portion 16. The outer peripheral flange portion 23 is fixed, and the module mounting frame portion 24 is provided between the door reinforcing portions 21 and 22 and the outer peripheral flange portion 23 so as to surround the opening. The

  And since the above-mentioned door reinforcement parts 21 and 22 are formed slightly smaller than the above-described door parts 7 and 8, between the two door reinforcement parts 21 and 22 and the outer peripheral flange part 23, A slit portion 25 having an H shape in bottom view is formed so as to surround a part of the cleavage line 9 having a “day” shape in bottom view (see FIG. 3).

  Further, between the door reinforcing portions 21 and 22 and the module mounting frame portion 24, a hinge portion 26 serving as a rotation center when the door portions 7 and 8 and the door reinforcing portions 21 and 22 are opened is provided.

  A position defining portion 27 is provided between the airbag grid member 5 and the resin reinforcing member 15 to position the both.

  Further, on the surfaces of the door reinforcing portions 21 and 22 and the door outer portion 16 on the airbag grid member 5 side, welding ribs 28 for performing the above-described welding are provided.

  Further, a locking hole 29 for mounting the airbag module 4 is provided on the side surface of the module mounting frame 24 described above.

  The above-described airbag module 4 is disposed in a state where the upper portion thereof is inserted into the above-described module mounting frame portion 24, and the hook portion 4 a provided on the upper portion is provided with the module mounting frame portion 24. With respect to the locking hole 29 formed on the (front and rear) side surface, the locking hole 29 is inserted and arranged in a loosely fitted state to be locked.

Here, when supplementary explanation is given, the above-mentioned “air bag grid member 5” is a panel member made of resin or the like. The airbag grid member 5 has basically a uniform thickness except for exceptional portions.
The above-described “airbag body 3” has a bag shape as described above, and is developed by injecting a working fluid in an emergency and is inflated into the vehicle interior.

  The above-mentioned “opening” is literally formed through the airbag grid member 5 in an emergency so that the airbag body 3 can be inflated into the vehicle compartment through the airbag grid member 5. The opening is substantially rectangular or square.

  The above-described “door portions 7 and 8” are provided to form the above-described opening portions in the airbag grid member 5 in an emergency, and in this case, the above-described opening portions are approximately second order in the vehicle front-rear direction. It shall be of the divided size.

  The above-mentioned “cleavage line 9” is literally a linear portion for cleaving the airbag grid member 5. The cleavage line 9 may be continuous such as a groove, or may be discontinuous such as a perforation.

In this case, the “lateral direction” described above is substantially the vehicle width direction.
The above-mentioned “lateral cleavage line portion 11” literally constitutes a portion extending in the lateral direction of the cleavage line 9.

In this case, the “vertical direction” described above is substantially the vehicle longitudinal direction.
The above-described “longitudinal cleavage line portion 12” literally constitutes a portion extending in the longitudinal direction of the cleavage line 9.

  The above-described passenger seat airbag device 2 operates as follows.

  That is, in an emergency, the airbag body 3 is inflated into a bag shape. The airbag grid member 5 is pushed by the pressure of the airbag body 3 inflated in a bag shape, the tear line 9 formed in the airbag grid member 5 is cleaved, and the door portions 7 and 8 are opened, thereby the airbag grid member. The bag-shaped airbag main body 3 bulges out from the opening formed in the vehicle interior into the vehicle interior. By bulging the air bag body 3 into the passenger compartment, it is possible to protect and restrain an occupant seated at a predetermined position of the seat.

  The door portions 7 and 8 can be defined by forming a tear line 9 on the back side of the airbag grid member 5. At this time, the cleavage line 9 has a lateral cleavage line part 11 extending to both sides in the lateral direction and a pair of longitudinal cleavage line parts 12 extending in the longitudinal direction through both ends of the lateral cleavage line part 11 as viewed from the bottom. By adopting a “Sun” -shaped one or the like, two door portions 7 and 8 that open in a double-tone manner are formed between the lateral cleavage line portion 11 and the pair of vertical cleavage line portions 12.

  In contrast to the background configuration as described above, the present embodiment has the following configuration.

<Configuration> The configuration will be described below.
(Configuration 1)
As shown in FIGS. 2 to 4 (mainly refer to FIG. 3), the vibration welded portion structure of this embodiment has a welding base material 31 (for example, an air grid member 5) and a welding component 32 (for example, a resin). The reinforcing member 15) has a welded portion 33 joined by vibration welding that vibrates in one direction.
The welding portion 33 has a joining surface 34 set on the welding base material 31 and an abutting surface 35 provided on the welding component 32 so as to be able to abut against the joining surface 34. Is done.
The joint surface 34 and the contact surface 35 are each substantially rectangular having a pair of side portions 36 extending in the vibration direction of vibration welding and a pair of side portions 37 extending in a direction orthogonal to the vibration direction. Is done.
A position defining portion 27 for defining the contact position of the contact surface 35 with respect to the joint surface 34 is provided between the welding base material 31 and the welding component 32.

The position defining portion 27 is provided in at least two locations so as to be positioned in a direction orthogonal to the vibration direction with respect to a diagonal position between the rectangular joining surface 34 and the contact surface 35 or in the vicinity thereof. .
The first position defining portion 27 provided in the diagonal first corner portion 38 (or in the vicinity thereof) is provided with the positioning protruding portion 41 erected in the vicinity of the outer portion of the joint surface 34 and the contact. A positioning accommodating portion 42 that extends outward from the surface 35 and can accommodate the protruding portion 41 is provided.
A second position defining portion 27 provided in the diagonal second corner portion 39 (or the vicinity thereof) is erected in the vicinity of the outer portion of the joining surface 34, and the edge portion of the contact surface 35 is It is assumed to have a positioning locking portion 43 that is locked directly or indirectly.

(Supplementary explanation 1)
Here, the above-described “welding substrate 31” is a member to be welded to which the welding component 32 is welded.
The above-mentioned “welded part 32” is a welding member that is welded to the welding base material 31.

  The above-mentioned “vibration welding” is literally a joining method in which the welding base material 31 and the welding component 32 are melt-bonded by vibration. In this case, the contact surface 35 of the welding component 32 is brought into contact with the bonding surface 34 of the welding base material 31, and the entire surface is between the bonding surface 34 of the welding base material 31 and the contact surface 35 of the welding component 32. Welding is performed by applying a certain direction of vibration in a pressurized state.

  The above-mentioned “welded part 33” is literally a part joined by vibration welding.

  The “joining surface 34” described above is formed on the back surface side of the welding base material 31.

  The above-mentioned “contact surface 35” is formed in a portion of the welded part 32 that faces the joint surface 34. The joining surface 34 and the contact surface 35 are basically the same size and shape. A welding rib 28 is provided on the contact surface 35. The welding rib 28 protrudes integrally from the contact surface 35 toward the joint surface 34.

  In this case, the above-mentioned “vibration direction” is approximately the vehicle width direction. And the above-mentioned welding rib 28 is extended toward the vibration direction. In this case, the welding rib 28 is extended in the vehicle width direction. Also, a plurality of welding ribs 28 are provided for the entire region of the door reinforcing portions 21 and 22 and the outer peripheral flange portion 23 in the resin reinforcing member 15.

  The above-mentioned “direction orthogonal to the vibration direction” is literally a direction orthogonal to the vibration direction. In this case, the vehicle front-rear direction is assumed.

  The above-mentioned “position defining portion 27” is an assist for enabling accurate installation at the correct position when the welding component 32 is attached to the welding base material 31.

  The above-described “positioning protrusion 41” is integrally projected from the welding base material 31 (the back surface thereof) toward the welding component 32 side.

  The above-described “positioning accommodating portion 42” is integrally formed with the welded part 32. The accommodating portion 42 is preferably a hole portion through which the protruding portion 41 passes. In addition, it is preferable that the above-described protruding portion 41 is formed to have a length that allows the tip portion to protrude from the accommodating portion 42.

  The above-described “positioning locking portion 43” is integrally projected from the welding base material 31 (the back surface thereof) toward the welding component 32 side.

(Configuration 2)
As shown in FIGS. 4 and 5, the accommodating portion 42 is provided with a loose hole portion 46 through which the protruding portion 41 is inserted with a slight gap 45 in the vibration direction.
And the said accommodating part 42 shall have the position definition surface 47 for position-defining the said protrusion part 41 with respect to the direction orthogonal to a vibration direction.

(Supplementary explanation 2)
Here, the “slight gap 45” described above is larger than the dimensional error of the protruding portion 41 and the accommodating portion 42, and smaller than the amplitude of vibration of vibration welding. In this case, if the dimensional error of the projecting portion 41 and the accommodating portion 42 is, for example, approximately 0.5 mm, and the vibration amplitude is, for example, 3.0 mm, the small gap 45 described above is adjusted. Is set to be within a range larger than 0.5 mm and smaller than 3.0 mm.

  The above-mentioned “loose hole 46” is literally not a tight hole 48 (not having the above-described slight gap 45) as shown in FIG. In this case, the loose hole portion 46 is a square hole having a side in the vibration direction and a side in a direction orthogonal to the vibration direction. On the other hand, the protrusion 41 has a surface in the vibration direction and a surface in a direction orthogonal to the vibration direction (positioning rib).

  The above-mentioned “position defining surface 47” literally defines the position in the direction orthogonal to the vibration direction, and in this case, is formed on the upper side in FIG.

(Configuration 3)
As shown in FIG. 5, the housing portion 42 is formed on the welding base material 31 side of the loose hole portion 46 so that the base side of the projecting portion 41 becomes wider with respect to the vibration direction. The inclined surface portion 51 is narrowed on the side.

(Supplementary explanation 3)
Here, the above-mentioned “base portion of the protruding portion 41” refers to the (root) portion of the protruding portion 41 on the welding base material 31 side.

  The above-mentioned “tip of the protruding portion 41” refers to a portion of the protruding portion 41 on the side away from the welding base material 31.

  The above described “inclined surface portion 51” is an interference reducing shape portion for reducing the interference portion with the base portion of the protruding portion 41 during vibration welding. The interference reducing shape portion is spread on both sides of the protruding portion 41. In this case, the interference reducing shape portion is formed so as to spread in the vehicle width direction. In this case, the inclined surface portion 51 is provided in a range of about half the thickness of the accommodating portion 42.

(Configuration 4)
As shown in FIG. 7, the positioning accommodating portion 42 has a thick portion 53 for extending the loose hole portion 46 on the side opposite to the welding base material 31.

(Supplementary explanation 4)
Here, the above-described “thick portion 53” is formed around the loose hole portion 46 on the surface of the accommodating portion 42 on the side opposite to the welding base material 31. The thick portion 53 has a thickness that is about the amount of reduction of the loose hole portion 46 by the inclined surface portion 51 described above.

(Configuration 5)
As shown in FIG. 8, the positioning accommodating portion 42 has a protruding edge portion 55 that protrudes toward the welding base material 31 around the loose hole portion 46, and an inner periphery of the protruding edge portion 55. An introduction taper portion 56 that guides the introduction of the protruding portion 41 into the housing portion 42 is formed in the portion.

(Supplementary explanation 5)
Here, the above-described “projection edge portion 55” is formed around the loose hole portion 46 on the surface of the housing portion 42 on the side of the welding base material 31. The projecting edge portion 55 has a height about the gap formed between the welding base material 31 and the welding component 32 after vibration welding.

  The “introducing taper portion 56” described above may have the same inclination angle as that of the inclined surface portion 51, or may have a different inclination angle.

  The protruding edge portion 55 and the introduction taper portion 56 may be provided together with the thick portion 53 described above, or may be provided separately from the thick portion 53.

(Configuration 6)
As described above, the welding base material 31 is the airbag grid member 5.
The welded part 32 is a resin reinforcing member 15 that is vibration welded to the back side of the airbag grid member 5.

(Supplementary explanation 6)
Here, the “air bag grid member 5” is as described above.

  The “resin reinforcing member 15” is as described above.

  In this case, the accommodating portion 42 of the first position defining portion 27 is provided at a position near one of the side portions 37 located on both sides in the vehicle width direction and closer to the side portion 36 located in front of the vehicle. Further, the locking portion 43 of the second position defining portion 27 is provided at a position close to the other of the side portions 37 located on both sides in the vehicle width direction in the side portion 36 located on the rear side of the vehicle. However, the installation positions of the first position defining unit 27 and the second position defining unit 27 are not limited to this.

  In addition, although the welding base material 31 and the welding component 32 assume the air bag grid member 5 and the resin reinforcement member 15, it is not restricted to these, It can be applied widely generally. Of course.

<Effect> According to this embodiment, the following effects can be obtained.
(Operation effect 1)
By providing at least two position defining portions 27 at or near the diagonal positions of the joint surface 34 and the contact surface 35, the welding component 32 is attached to the welding base material 31 with a small number of position defining portions 27. Can be effectively positioned with respect to the vibration direction, the direction orthogonal to the vibration direction, and the rotation direction.

  Further, by providing the first position defining portion 27 and the second position defining portion 27 outside the joining surface 34 and the contact surface 35, it is not necessary to reduce the area of the vibration welding portion (welding area). As a result, a stronger welded state can be obtained as compared with the case where the position defining portion 27 is provided inside the joining surface 34 and the contact surface 35.

  Then, by configuring the first position defining portion 27 with the protruding portion 41 and the accommodating portion 42, the operator can reliably position by confirming that the protruding portion 41 is accommodated in the accommodating portion 42. Work can be done. In addition, since it is only necessary to check the housing state of the protruding portion 41 and the housing portion 42 at only one location of the first position defining portion 27, the position defining operation is facilitated at each stage. Furthermore, the number of parts that can be damaged by vibration welding can be reduced to one.

  Further, the second position defining portion 27 is the locking portion 43 that is configured to directly or indirectly lock the edge portion of the contact surface 35 described above, thereby effectively and reliably with a simple configuration. Positioning can be performed. Moreover, since the locked state of the second position defining portion 27 can be confirmed at the edge of the relatively large contact surface 35 in the welded part 32, the positioning operation can be performed easily and reliably. Further, the locking portion 43 can be prevented from being damaged by vibration welding.

(Operation effect 2)
As shown in FIG. 4, the accommodating portion 42 includes a loose hole portion 46 through which the protruding portion 41 is inserted with a slight gap 45 in the vibration direction. Even if the angle at which the base of the protrusion 41 is bent is small, the angle can be reduced. Thereby, it is possible to make the base portion of the protruding portion 41 difficult to break.

  On the other hand, as shown in FIG. 6, in the case of the tight hole portion 48, the angle at which the base portion of the protruding portion 41 is bent at the time of vibration welding is larger than the above, so the base portion of the protruding portion 41 is The possibility of breakage increases.

  Further, the housing portion 42 has the position defining surface 47 for positioning the protrusion 41 with respect to the direction orthogonal to the vibration direction, so that the position definition with respect to the direction orthogonal to the vibration direction can be reliably performed. Can do.

(Operation effect 3)
As shown in FIG. 5, the accommodating portion 42 is an inclined surface portion where the base portion side of the projecting portion 41 becomes wider and the distal end side of the projecting portion 41 becomes narrower with respect to the vibration direction on the welding base material 31 side of the loose hole portion 46. By having 51, the angle at which the base of the protrusion 41 is bent during vibration welding can be further reduced.

  Further, since the position of the loose hole portion 46 is separated from the welding base material 31 in the direction perpendicular to the surface by the amount of the inclined surface portion 51, the angle at which the base portion of the protruding portion 41 is bent during vibration welding. Can be made smaller.

  Accordingly, it is possible to prevent the protrusion 41 from being damaged due to bending deformation and the separation and dropping of the protrusion 41 due to the damage.

(Operation effect 4)
As shown in FIG. 7, it is necessary for positioning by providing a thick portion 53 on the opposite side of the welding base material 31 of the accommodating portion 42 for positioning and extending the loose hole portion 46 to the opposite side. The length of the loose hole 46 can be secured. As a result, as described above, positioning accuracy can be secured and improved while reducing the angle at which the base of the protrusion 41 is bent during vibration welding.

(Operation effect 5)
As shown in FIG. 8, the positioning accommodating portion 42 has an introduction taper portion 56 on the inner peripheral portion of the protruding edge portion 55 that protrudes toward the welding base material 31 formed around the accommodating portion 42. Even in a groping situation that cannot be directly seen from the outside, the guide taper portion 56 can guide the projection portion 41 into the accommodating portion 42 so that the position can be regulated relatively easily. Become. Thereby, installation of the welding component 32 with respect to the welding base material 31 and a position prescription | regulation operation | work can be facilitated.

(Operation effect 6)
And when the welding base material 31 is the air bag grid member 5 and the welding component 32 is the resin reinforcing member 15, the resin reinforcing member 15 is brought into contact with the back side of the air bag grid member 5 and vibration welding is performed. In addition, it is possible to obtain the effects of facilitating the position definition and preventing the position defining portion 27 from being damaged.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 5 Airbag grid member 15 Resin reinforcement member 27 Position-defining part 31 Welding base material 32 Welding part 33 Welding part 34 Joining surface 35 Contact surface 36 Side part 37 Side part 38 First corner part 39 Second corner part 41 Positioning projection part 42 Positioning accommodating part 43 Positioning locking part 45 Slight gap 46 Loose hole part 47 Position defining surface 51 Inclined surface part 53 Thick part 55 Projecting edge part 56 Introduction taper part

Claims (6)

The welding base material and the welding component have a welding part joined by vibration welding that vibrates in one direction,
The welded portion has a joint surface set on the welding base material, and a contact surface provided on the welded part so as to be able to contact the joint surface,
The joint surface and the contact surface are each of a rectangular shape having a pair of side portions extending in a vibration direction of vibration welding and a pair of side portions extending in a direction orthogonal to the vibration direction,
In the vibration welded part structure provided with a position defining part for defining the contact position of the contact surface with respect to the joint surface between the welding base material and the welded part,
The position defining portion is provided in at least two locations so as to be positioned in a direction orthogonal to the vibration direction with respect to the diagonal position of the joint surface and the contact surface having a rectangular shape or the vicinity thereof,
The first position defining portion provided at the diagonal first corner portion,
A positioning protrusion erected in the vicinity of the outer portion of the joint surface;
A positioning accommodating portion that protrudes outward from the contact surface and can accommodate the protruding portion;
The second position defining portion provided at the diagonal second corner portion is erected in the vicinity of the outer portion of the joint surface to directly or indirectly lock the edge portion of the contact surface. A vibration welded part structure having a locking part for positioning. The accommodating portion includes a loose hole portion through which the protruding portion is inserted with a slight gap with respect to the vibration direction, and
The vibration welding part structure according to claim 1, wherein the accommodating part has a position defining surface for defining the position of the protrusion with respect to a direction orthogonal to the vibration direction.   The accommodating portion has an inclined surface portion on the welding base material side of the loose hole portion, the base portion side of the projecting portion is widened and the tip end side of the projecting portion is narrowed with respect to the vibration direction. The vibration welded part structure according to claim 1 or 2.   4. The positioning housing portion according to claim 1, further comprising a thick portion for extending the loose hole portion on a side opposite to the welding base material. The vibration welded part structure according to the item.   The positioning accommodating portion has a protruding edge portion protruding toward the welding base material around the loose hole portion, and an inner peripheral portion of the protruding edge portion is provided with the protruding portion to the receiving portion. The vibration welded portion structure according to any one of claims 1 to 4, further comprising an introduction taper portion for guiding introduction.   The said welding base material is an airbag grid member, The said welding components are resin-made reinforcement members welded by vibration on the back surface side of the said airbag grid member, The any one of Claim 1 thru | or 5 characterized by the above-mentioned. The vibration welded part structure according to the item.