JP4561264B2 - Automotive interior panel structure - Google Patents

Description

  The present invention relates to an automotive interior panel structure that covers an airbag inflating side of an airbag module for protecting an occupant from an impact when the automobile collides, and relates to a panel body that covers the upper surface of the module, and a back surface of the panel body. The present invention relates to a panel structure including a welded backing member.

  Conventionally, this type of automobile interior material, for example, an instrument panel upper fascia has an opening, and when the airbag is inflated, the lid body covering the opening is cleaved along a predetermined planned tear line. Although the bulge opening is formed, the upper fascia usually applies a member with an appearance that harmonizes with the trims of other passenger compartments, and the lid body uses a soft resin material that can realize the desired tearing characteristics. The lid body and the upper fascia lacked a sense of unity, and could not be said to be a preferred design aspect.

  Recently, a panel of the same size as that covered by the instrument panel upper fascia was molded with a material that harmonized with the feel and appearance of the interior parts on the periphery, and a backing member was attached to the back surface to assist. What has obtained a desired cleavage characteristic has been put into practical use (for example, Patent Documents 1 and 2).

  The “instrument panel with an airbag” described in Patent Document 1 is a mounting bracket (backing) in which a plurality of protrusions protrude from the upper surface of the instrument panel having a perforation (tea line) formed on the rear surface. (Corresponding to the member), and the mounting bracket can be attached to the instrument panel without the need for fixing means such as rivets and screws, so the number of parts and assembly man-hours can be reduced. Have.

  In addition, the “cover body of an airbag device” described in Patent Document 2 has a first rib portion and a second rib portion projecting in a lattice shape on the upper surface on the back surface of the cover body covering the opening portion opened in the instrument panel. A support body (corresponding to a backing member) having a provided skin part is vibration welded. By making the width of the first rib part 1 to 3 times the width of the second rib part, The skin portion has an effect that it can be welded uniformly with a predetermined welding strength.

  On the other hand, in Patent Documents 1 and 2 in which the backing member is vibration welded to the back surface of the instrument panel and other interior panels, a large number of welding ribs are projected in advance on the upper surface of the backing member. When the instrument panel or the interior panel and the backing member are vibration welded, they are provided so as to be parallel to the direction in which they are pressed against each other (hereinafter referred to as the “crimping direction”).

Then, in a state where these welding ribs are pressed against the back surface of the instrument panel or the like, when the backing member is vibrated in a direction crossing the crimping direction, for example, in the left-right direction, the welding ribs are melted by frictional heat generated on the pressing surface, This is interposed between the two and becomes a binder, and a backing member is welded to the back surface of an instrument panel upper fascia or the like.
JP 2001-294114 A JP 2004-175305 A

  Like the instrument panel described in the above-mentioned patent document, the instrument panel facing surface of the instrument panel is simple and flat, and the mounting plate of the backing member is formed substantially perpendicular to the facing surface of the casing. When molding a member, it is perpendicular to the plate-shaped welding surface in the vertical direction, that is, the mounting plate and the welding rib are almost parallel to the opening direction of the mold. And there is no part that would hinder the release.

  However, the mounting plate for the backing member cannot always be set at an angle that allows easy release, and may need to be provided with an angle of inclination with respect to the passenger compartment facing surface. Accordingly, if an inclination angle is given to the welding rib, it will not be caught in the mold splitting direction, and there will be no trouble in releasing.

  However, when welding is performed with a welding rib having such an inclination angle, the rib cross section becomes larger with respect to the welding direction, and the welding rib is inclined or falls by the pressing force, so that the effective area of the welding rib is reduced. Not constant.

  For this reason, excessive heat is generated at the time of welding, and the effect of heat appears on the upper fascia as a change in appearance, and there is a possibility that the purpose of the panel aiming at harmony with surrounding interior parts may not be achieved. In order to prevent such heat generation, adjusting the welding energy condition to reduce the appearance quality will improve the appearance quality, but the desired welding strength may not be obtained. There is a possibility that the objective of forming it stably cannot be achieved sufficiently.

  In view of this point, the present invention provides a welding range in an appropriate range even when the panel body and the backing member are vibration-welded, even if the welding member is a backing member in which an attachment piece with an inclination angle is set. An object is to provide an automobile interior panel structure that can be controlled by the vehicle.

Automobile interior panel structure of the present invention of the present application, as well as have the upper surface facing the instrument panel which is inclined in the vehicle compartment front-rear direction at substantially the same angle as the surface facing the passenger compartment in the instrument panel, an automobile A panel body provided at an opening of the instrument panel so as to cover an airbag module having an airbag inflated and deployed by an inflating gas ejected from an inflator at the time of a collision, and having a planned fracture line on the back surface; An automotive interior panel structure comprising a backing member made of a thermoplastic resin that is vibration welded to the lower surface of the main body, wherein the backing member is a direction in which the backing member is crimped to the panel body during the vibration welding When the angle perpendicular to the panel body, which is B, is 0 degree, the vibration with respect to the perpendicular angle And a welding rib projecting on the upper surface of the backing member facing the panel body at an inclination angle of ± 45 degrees or less so that collapse deformation is suppressed during wearing, and the backing member is An attachment piece is provided on the lower surface so as to protrude with respect to the pressure-bonding direction B with an inclination angle larger than the inclination angle of the welding rib .

  Therefore, according to the present invention, the backing member is provided with a welding rib projecting at a predetermined angle with respect to the opposing surface, and the backing member has an inclination angle larger than the angle of the welding rib with respect to the opposing surface. Since the mounting piece is provided in a protruding manner, the falling deformation of the welding rib is suppressed, the welding area is stably secured, the heat generation is not excessive, and the welding amount is not excessive and the welding state is maintained. It becomes uniform and stable, the welding strength can be stably obtained, and the appearance deterioration due to the thermal influence on the panel body can be prevented.

Further, the automobile interior panel structure of the present invention of the present application have a top surface that faces the instrument panel which is inclined in the vehicle compartment front-rear direction at substantially the same angle as the surface facing the passenger compartment in the instrument panel, A panel main body provided at an opening of the instrument panel so as to cover an airbag module having an airbag inflated and deployed by an inflating gas ejected from an inflator ejected from an inflator at the time of an automobile collision, and having a planned fracture line on the back surface; An automotive interior panel structure comprising a backing member made of a thermoplastic resin that is vibration welded to the lower surface of the panel body, wherein the backing member is used during the vibration welding of the backing member to the panel body. When the angle perpendicular to the panel body in the crimping direction B is 0 degree, Comprising a welding rib collapse deformation protruding from the upper surface of the backing member has an inclined angle of ± 45 degrees or less, as inhibition during vibration welding, and, facing the panel main body in the backing member An attachment piece is provided on a lower surface of the welding rib so as to protrude with the same inclination angle as the inclination angle of the welding rib with respect to the pressing direction B.

  Therefore, the present invention includes a welding rib provided on the backing member having a predetermined inclination angle in a predetermined direction with respect to the facing surface and protruding from the panel facing surface, and the backing member having a welding rib with respect to the facing surface. The mounting rib is inclined in the same direction as the inclination direction of the panel and protruded on the opposite surface of the panel, so that the falling deformation of the welding rib is suppressed, the welding area is stably secured, and the heat generation is excessive. Therefore, the welding amount is not excessive, the welding state is uniform and stable, the welding strength is stably obtained, and the appearance deterioration due to the thermal influence on the panel body can be prevented.

Further, the invention is vibration since the sliding heat generation portion of the panel body during the dynamic welding is not to the extreme rise in temperature, less affected by the surface of the panel body, in particular thermal to breakable line It is possible to prevent so-called welding sink marks and steps due to the influence.

Another invention of the present application, in any one of the preceding two inventions, the upper surface facing the panel main body in the backing member, and a frame-like flange portion having an opening, so as to cover the opening provided, and having the flange portion and the door portion connected by a hinge, is made by projecting the welding ribs on side of the flange portion and the door portion.

  Therefore, the present invention exhibits the operational effects achieved by either of the two preceding inventions, and the back surface of the panel body is pressed through the door portion by the inflation pressure of the airbag, thereby reliably breaking the planned fracture line. In addition, since the panel body is reinforced by the door portion of the backing member, even if a person pushes the panel body on the surface side and external force is applied, the planned break line of the panel body does not break.

  Still another invention according to the present application is formed by projecting the welding rib on the inner side at least 5 mm away from the edge of the backing member in any of the preceding inventions. With this configuration, it is possible to prevent the molten resin melted by the welding ribs from protruding from the edge, so that the finish of the welding is good, the resin loss due to the molten resin flowing out between the panel body and the backing is suppressed, and the bonding Therefore, the resin amount for securing can be secured. Furthermore, it does not protrude to the side of the air bag inflation passage, and there is no influence on the turning operation of the door when the air bag is deployed.

  According to the automobile interior panel structure of the present invention, the backing member is provided with a welding rib protruding at a predetermined angle with respect to the opposing surface, and the backing member has an angle of the welding rib with respect to the opposing surface. Because the mounting piece has a large inclination angle and protrudes on the back side, or the backing member protrudes on the panel facing surface with a predetermined inclination angle in a predetermined direction with respect to the facing surface. The welding ribs are provided with mounting pieces that are inclined in the same direction as the inclination direction of the welding ribs with respect to the facing surface and projectingly provided on the opposite surface of the panel, thereby stabilizing the welding area of the welding ribs. Therefore, the panel main body and the backing can be stably and reliably welded by vibrations, and an excessive heat generation state is not caused, and the appearance of the panel main body is not impaired.

  Embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a panel body drawn in a state of engaging with an airbag module installed inside an instrument panel and covering the airbag module, and FIG. 2 is a perspective view of the backing member seen through the panel body. FIG. 3 is a cross-sectional view taken along the line XX of FIG. 1, FIG. 4 is an explanatory view showing the relationship between the inclination angle of the panel body in the front-rear direction and the airbag module, and FIGS. 11 is an operation explanatory diagram.

  The instrument panel 2 shown in FIGS. 1 and 2 is provided with an opening 2a on a facing surface 2b facing the passenger compartment, and the opening 2a is covered with a panel main body 1 constituting an automobile interior material. Furthermore, the panel main body 1 covers the opening 2a provided on the facing surface 2b facing the vehicle compartment in the instrument panel 2 installed at the front portion of the vehicle cabin so as to be inclined at the angle θ1 in the front-rear direction. It is comprised and it is provided so that it may incline in the front-back direction at the substantially the same angle as the opposing surface 2a and the inclination angle (theta) 1 with the compartment of the instrument panel 2. FIG.

  The opening 2a of the instrument panel 2 is opened in front of a passenger seat (not shown), and locking means for locking the panel body 1 to the opening 2a of the instrument panel 2 is provided at the inner periphery of the opening 2a. (Not shown) is provided.

  When the panel body 1 is attached to the opening 2a of the instrument panel 2, a thermoplastic resin having the same color and material as that of the instrument panel 2 such as talc is included so as not to cause a sense of incongruity with the instrument panel 2. It is integrally formed of polypropylene (PP composite), and a “day” -shaped tear line 4 composed of an outer peripheral line 4 a and a center line 4 b is recessed on the back surface of the panel body 1.

  The backing member 5 that is vibration welded to the back side of the panel body 1 is integrally molded with a thermoplastic resin softer than the panel body 1, such as an olefin elastomer (TPE), a polyester airlastomer (TPEE), or the like. Thus, a frame-like flange portion 5b having an opening portion 5a that is substantially the same size as the frame-like portion 4a of the tear line 4 formed on the back surface of the panel main body 1, and substantially projecting downward from the opening edge of the opening portion 5a. A rectangular tubular airbag mounting piece 5c is provided so as to close the opening 5a, and is connected to the opening edge of the flange 5b by a thin-walled hinge 5d divided into a plurality of parts in the left-right direction of the panel body 1. The door portion 5e is formed, and a tear line 5f is formed on the upper surface or the lower surface of the door portion 5e at substantially the same position as the center line 4b of the tear line 4.

  The airbag attachment piece 5c projecting downward from the opening edge of the opening 5a has an upper surface of the backing member 5, that is, an upper surface of the flange portion 5b and the door portion 5e, and an inclination angle θ1 in the front-rear direction of the instrument panel 2. The angle of inclination is such that it is substantially vertical when it is vibration welded to the back surface of the panel body 1 that is inclined 10 degrees in the front-rear direction, for example, the same as θ1.

  A plurality of welding ribs 5h are projected from the upper surface of the flange portion 5b and the upper surface of the door portion 5e so as to be parallel to the horizontal direction of the panel body 1 and spaced in the front-rear direction. Among them, the welding rib 5h protruding at a position closest to the opening 5a is protruding at a position at least 5 mm away from the opening edge.

  The welding rib 5h is melted by frictional heat when the backing member 5 is vibration welded to the back surface of the panel body 1, and welds the upper surface of the panel body 1, the flange portion 5b of the backing member 5, and the door portion 5e. 5, the corner portion on the distal end side is a small arc shape, and the distal end side is formed from a ridge that is slightly narrower than the proximal end side, and is an angle perpendicular to the pressing direction B of the backing member 5, that is, the panel body 1 When the angle is set to 0 degrees, the panel body 1 is formed so as to be inclined in the front-rear direction of the panel body 1 at a predetermined angle set within a range of ± 45 degrees, preferably within a range of ± 15 degrees. And the angle C with the flange part 5b in the airbag attachment piece 5c and the upper surface of the door part 5e is set larger than the said predetermined angle of the welding rib 5h.

  That is, the panel main body 1 is, for example, injection-molded with a thermoplastic resin softer than the panel main body 1, but the mold drawing direction when taking out from the mold after molding is parallel to the substantially rectangular tube-shaped airbag mounting piece 5 c. Arrow A direction.

  On the other hand, when the backing member 5 is vibration welded to the back surface of the panel body 1, the pressing direction of the backing member 5 with respect to the panel body 1 is the arrow B direction shown in FIG. In the case of approximately 10 degrees, in order to make the protruding direction of the welding rib 5h coincide with the mold release direction A, the angle formed by the protruding direction of the welding rib 5h and the pressing direction B is approximately 10 degrees.

In the case of vibration welding the backing member 5 to the panel body 1, whereas, for example, the panel body 1 is fixed, while for example the backing member 5, the horizontal direction of the panel body 1, i.e. to vibrate in the arrow C direction shown in FIG. 1 It will be. The operation during vibration welding will be described later.

  On the other hand, a plurality of attachment holes 5g made of elongated holes that are elongated in the vertical direction are formed in the lower part of the airbag attachment portion 5c of the backing member 5 at intervals in the left-right direction as shown in FIG. The upper part of the airbag module 6 is attached to the hole 5g.

  The airbag module 6 has an upper retainer 6a and a lower retainer 6b formed of a metal plate, and an inflator 7 that ejects high-pressure gas is accommodated in the lower retainer 6b.

  Locking claws 6c made of a plurality of hooks are fixed outwardly on the upper outer peripheral surface of the upper retainer 6a, and these locking claws 6c are attached to the airbag mounting portion 5c of the backing member 5. The backing member 5 and the airbag module 6 are connected to each other in a floating state, and are folded in the backing member 5 and the upper retainer 6a. The airbag 8 in the state is accommodated.

  The airbag 8 is connected to a gas outlet (not shown) of the inflator 7 accommodated in the lower retainer 6b, and is inflated and deployed by the high-pressure gas ejected from the inflator 7. The airbag module 6 is attached to the vehicle body by fixing the bracket 6d protruding from the outer peripheral surface of the retainer 6b to the fixing member 9 on the vehicle body side with the fixing tool 10.

  In addition, the thickness from the bottom part of the tear lines 4a and 4b formed in the back surface of the panel main body 1 and the tear line 5f formed in the door part 5e of the backing member 5 is about 0.3 to 1.5 mm. The tear lines 4a, 4b, 5e may be formed when the panel body 1 and the backing member 5a are molded, or may be formed by machining after molding. Good.

  Next, the operation of the panel structure of the automobile interior material constructed as described above will be described.

  Before attaching the airbag module 6 to the back side of the panel body 1, first, the backing member 5 is vibration welded to the back side of the panel body 1.

  In vibration welding, the upper surface of the backing member 5 is brought into contact with the back surface side of the panel body 1 fixed by appropriate means, and formed on the center line 4b of the tear line 4 on the panel body 1 side and the door portion 5e of the backing member 5. When the positioning is performed so that the tear lines 5f coincide with each other, the backing member 5 is crimped in the crimping direction B shown in FIG.

  As a result, the front end of the welding rib 5 h protruding from the upper surface of the flange portion 5 b of the backing member 5 and the door portion 5 e is pressure-bonded to the back surface of the panel body 1.

  Next, in this state, when the backing member 5 is vibrated in a vibration direction C parallel to the horizontal direction of the panel body 1, frictional heat is generated at the contact portion between the back surface of the panel body 1 and the welding rib 5h, and the welding rib 5h is at the tip. As shown in FIG. 6, the tip of the welding rib 5 h flows out between the back surface of the panel body 1, the top surface of the flange portion 5 b and the top surface of the door portion 5 e by the pressing force. The upper surfaces of 5b and door portion 5e are welded.

  Since the welding rib 5h is projected in advance at a position separated by, for example, 5 mm or more from the opening edge of the opening 5a, a part of the molten welding rib 5h does not reach the opening edge. Part of the molten resin in which the ribs 5h are melted does not protrude as burrs, and this does not hinder the door 5e from being opened or the airbag 8 from being inflated.

  7 and 8 show the operation when the backing member 5 is vibrated and welded to the back surface of the panel body 1 attached to the instrument panel 2 having an inclination angle θ2 in the front-rear direction of, for example, 30 degrees.

  Since the action when the backing member 5 is vibration welded to the back surface of the panel body 1 is the same as that when the inclination angle θ2 is 10 degrees, the description thereof will be omitted, but in this case as well, the molten welding rib 5h is as shown in FIG. Therefore, a part of the welding rib 5h does not protrude as a burr toward the opening 5a side.

  On the other hand, FIG. 9 and FIG. 10 show a case where the backing member 5 is vibration welded to the back surface of the panel body 1 attached to the instrument panel 2 whose front and rear inclination angle θ1 exceeds 45 degrees, for example.

  In this case, the welding rib 5h inclined at a large inclination angle with respect to the backing member 5 exceeds 45 degrees with respect to the pressing direction B of the backing member 5 (about 50 degrees in FIG. 9), and is ± 45 degrees. Since it goes out of range, the following problems arise.

  That is, when the protruding direction of the welding rib 5h exceeds 45 degrees with respect to the pressure-bonding direction B, when the backing member 5 is vibrated in the vibration direction C, the temperature rises due to friction generated in the contact portion. However, the temperature reaches 55 ° C., and the welding rib 5h is excessively melted.

  This can be said to be a significantly higher temperature than 30 ° C. to 50 ° C. when the preferred temperature range is to weld TPE to the PP composite.

  As a result, the temperature in the vicinity of the tear line 4 formed on the back surface of the panel main body 1 also rises more than necessary, so that the thin panel main body 1 is deformed by the tear line 4, and the upper surface side of the tear line 4 is changed to FIG. As shown in FIG. 11 and a drop as shown in FIG. 11-2 occur, the design appearance of the panel body 1 is damaged.

  Further, the welding rib 5h that has become excessively hot may become difficult to stand by in the vibration welding process and fall in the vibration direction C. As a result, the melting of the welding rib 5h does not proceed sequentially from the tip side. When the welding rib 5h falls down, the vibration energy direction is intensively applied to the welding rib itself, and a uniform welding strength distribution is required for the welding surface, but a welding result having a large variation (distribution) width is obtained. .

  Therefore, the protruding direction of the welding rib 5h should be in the range of ± 45 degrees, preferably about ± 15 degrees with respect to the pressing direction B of the backing member 5, and naturally the die cutting direction A of the backing member 5 is also in this range.

  When the backing member 5 is vibration welded to the back surface of the panel main body 1 as described above, the inflator 6 and the airbag 8 are accommodated in the upper and lower retainers 5b and 5c of the airbag module 6, and the outer retainer 5b is placed on the outer peripheral surface of the upper retainer 5b. The protruding locking claw 5d is locked from the inside of the airbag mounting portion 5e into a locking hole 5f formed in the airbag mounting piece 5c of the backing member 5.

  In this state, the opening 2a is covered by the panel body 1 from the surface side of the instrument panel 2, and the panel body 1 is locked to the opening 2a of the instrument panel 2 by locking means (not shown).

  After that, the bracket 6d protruding from the lower retainer 6b of the airbag module 6 is attached to the fixing member 9 on the vehicle body side by the fixing tool 10, but the space between the backing member 5 and the airbag module 6 is in a floating state. Even if there is a variation in the attachment position of the ment panel 2 and the airbag module 6, this variation can be absorbed, so that the attachment operation of the airbag module 6 can be easily performed in a short time.

  On the other hand, when the automobile collides during the operation of the automobile and the airbag 8 starts to inflate due to the impact, the door portion 5e of the backing member 5 is pushed up by the inflation pressure of the airbag 8, and thereby the inflation pressure of the airbag 8 Since the tear line 5f of the door part 5e and the central line 4b part of the tear line 4 of the panel body 1 are torn, the door part 5e is rotated upward about the hinge 5d to open the opening part 5a. The bag 8 is further deployed to the passenger side of the passenger seat while continuing to inflate, thereby protecting the passenger from impact.

  In the above-described embodiment, the case where the airbag module 6 is attached to the back surface of the panel body 1 covering the opening 2a opened in the instrument panel 2 has been described. However, the tear line 4 formed on the back surface of the instrument panel 2 is described. This can also be applied to a panel structure of an automobile interior material in which the airbag module 6 is attached to the inside of the vehicle.

  In the above embodiment, the panel main body 1 has been described as a relatively simple flat plate. However, the present invention is not limited to this, and includes a case where the panel main body 1 is formed in a curved shape. In this case, the inclination angle of the welding rib 5h or the airbag attachment piece 5c may be selected in conformity with the curved surface shape.

  In addition, the panel body 1 and the instrument panel 2 can be applied to automotive interior materials whose surfaces are covered with a soft skin, and further, a trim structure that covers an inflatable curtain to be mounted on the roof rail portion of the vehicle, etc. The present invention can be used with various modifications.

  The panel structure of an automobile interior material according to the present invention includes a welding rib provided on the backing member so as to project at a predetermined angle with respect to the opposing surface, and the angle of the welding rib with respect to the opposing surface on the backing member. Because the mounting piece has a larger inclination angle and protrudes on the back side, or the backing member protrudes on the panel facing surface with a predetermined inclination angle with respect to the facing surface in a predetermined direction Since the welding rib is provided and the backing member is provided with a mounting piece that is inclined in the same direction as the inclination direction of the welding rib with respect to the opposing surface and protrudes from the opposite surface of the panel, the welding area of the welding rib is stabilized. The panel body and the backing can be vibrated stably and reliably, without causing excessive heat generation and without damaging the appearance of the panel body. To protect It is most suitable for an automotive interior panel structure that covers the airbag expansion side of the airbag module, particularly a panel structure that includes a panel body that covers the module upper surface and a backing member that is welded to the back surface of the panel body. .

It is a perspective view of the panel main body drawn in the state which covered the airbag module installed inside the instrument panel used as an embodiment of the invention. It is the top view seen through the panel main body used for the airbag apparatus which becomes embodiment of this invention from the upper surface side of the backing member. It is sectional drawing which follows the XX line of FIG. It is explanatory drawing which shows the relationship between the inclination angle of the front-back direction of a panel main body, and an airbag attachment part. It is operation | movement explanatory drawing of the airbag apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing of the airbag apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing of the airbag apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing of the airbag apparatus which becomes embodiment of this invention. It is effect | action explanatory drawing which showed the comparative example for demonstrating the effect | action of the panel structure of this invention. It is effect | action explanatory drawing which showed the comparative example for demonstrating the effect | action of the panel structure of this invention. It is operation | movement explanatory drawing of the airbag apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing of the airbag apparatus which becomes embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panel main body 2 Instrument panel 2a Opening part 4 Tear line 5 Backing member 5a Opening part 5b Flange part 5c Airbag attachment piece (attachment piece)
5e Door portion 5h Welding rib 6 Air bag device 7 Inflator 8 Air bag A Die release direction B Crimping direction C Vibration direction

Claims (4)

As well as have the upper surface facing the instrument panel which is inclined in the vehicle compartment front-rear direction at substantially the same angle as the surface facing the passenger compartment in the instrument panel, inflated by inflation gas ejected from the collision inflator automobile A panel body provided at the opening of the instrument panel so as to cover an airbag module having an airbag to be deployed and having a planned fracture line on the back surface; and a thermoplastic resin that is vibration welded to the lower surface of the panel body An automotive interior panel structure comprising a backing member,
When the backing member has an angle perpendicular to the panel main body, which is the pressure bonding direction B when the vibration welding of the backing member to the panel main body is 0 degree, the vibration welding is performed with respect to the vertical angle. comprising a welding rib protruding from the upper surface opposite to the panel body in the backing member deformation has an inclined angle of ± 45 degrees or less, as inhibition falling upon,
And, automotive interior panel structure characterized in that it comprises a mounting piece which is collision set have a larger inclination angle than the inclination angle of the welding ribs with respect to the crimping direction B on the lower surface of the backing member. As well as have the upper surface facing the instrument panel which is inclined in the vehicle compartment front-rear direction at substantially the same angle as the surface facing the passenger compartment in the instrument panel, inflated by inflation gas ejected from the collision inflator automobile A panel body provided at the opening of the instrument panel so as to cover an airbag module having an airbag to be deployed and having a planned fracture line on the back surface; and a thermoplastic resin that is vibration welded to the lower surface of the panel body An automotive interior panel structure comprising a backing member,
When the backing member has an angle perpendicular to the panel main body, which is the pressure bonding direction B when the vibration welding of the backing member to the panel main body is 0 degree, the vibration welding is performed with respect to the vertical angle. comprising a welding rib protruding from the upper surface opposite to the panel body in the backing member deformation has an inclined angle of ± 45 degrees or less, as inhibition falling upon,
And, automotive interior panel structure characterized in that it comprises a mounting piece projecting have the inclination angle and the same inclination angle of the welding ribs with respect to the crimping direction B on the lower surface of the backing member. On surfaces facing the panel main body in said backing member has a frame-like flange portion having an opening, provided to cover the opening, and the door portion connected by the flange portion and the hinge , the flange portion and the automobile interior panel structure according to the welding ribs on side to claim 1 or 2 formed by projecting the door. The welding rib, automobile interior panel structure according to any one of claims 1 to 3 formed by collision set inside apart 5 mm or more than the edge of the backing member.

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