JP2011073469A - Vehicle interior component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle interior component having a greatly curved design surface and transmitting a pressing force to each of welding ribs uniformly and welding each of welding ribs uniformly to prevent the formation of undesirable appearance. <P>SOLUTION: This vehicle interior equipment is constituted by forming a receiving plane 24 extended in the direction crossing the pressing direction during vibratory welding orthogonally in a curved part of an outer panel 2 and welding the welding ribs 31 protruding in the pressing direction from an inner panel 3 on the receiving plane 24. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicle interior such as a grab box door, a door trim, and a console door.

  For example, a resin-made grab box door includes an outer panel having a design surface that is exposed to the vehicle interior and an inner panel that reinforces the outer panel, and is formed by integrating the two. In order to integrate the two, a vibration welding method is widely used as described in, for example, Japanese Patent Laid-Open No. 10-244881.

  However, vehicle interior parts such as grab box doors generally have a curved design surface. For this reason, the welding rib may collapse during vibration welding, resulting in poor welding or poor appearance. In view of this, the above publication discloses that a fall prevention rib for preventing the fall of the welding rib formed on the inner member is formed on the outer member.

  Japanese Patent Application Laid-Open No. 2003-034187 describes that the approaching contact angle of the welding piece with respect to the welding surface of the mating member is formed so as to gradually decrease as the distance from the curved portion of the mating member increases. By projecting the weld pieces in an inclined manner in this way, the method of projecting each weld piece can be made parallel to the pressurizing direction during vibration welding, and each weld piece can be made uniform on the weld surface of the mating member. It can be made to contact.

Japanese Patent Laid-Open No. 10-244881 JP2003-034187

  The vibration welding method is a method in which a tip of a welding rib and the welding surface of a mating member are welded by heat generated by friction by applying vibration while pressing a pair of members in contact with each other. Therefore, in order to transmit the pressure force uniformly to each welding rib, it is necessary to make the protruding direction of each welding rib parallel to the pressing direction.

  However, in the case of a vehicle interior having a curved design surface such as a grab box door, if the protruding direction of each welding rib is parallel to the pressurizing direction, the angle of the welding rib with respect to the welding surface of the mating member depends on the part. It becomes different, and the welding rib with a small angle tends to fall down to the side with a small angle. For this reason, it is difficult for the pressure force to be uniformly transmitted to each welding rib, and the appearance design may be poor, such as non-uniform welding and the appearance of a highlight portion.

  Moreover, even if the fall prevention rib is formed as described in Patent Document 1, there is a limit, and it has been difficult to reliably prevent the above-described problems.

  The present invention has been made in view of such circumstances, and even in the case of a vehicle interior product having a greatly curved design surface, the pressure force is uniformly transmitted to each welding rib, It is a problem to be solved to prevent uniform appearance by uniform welding.

  A feature of the vehicle interior product of the present invention that solves the above-described problems is composed of an outer panel made of a resin molded body having a design surface and an inner panel integrated with the outer panel by vibration welding. A plurality of welding projections projecting in the pressurizing direction at the time of vibration welding are formed on one inner surface, and the other inner surface of the outer panel and the inner panel has a first surface and a second surface on which the tangents of cross sections intersect each other. At least one of the first surface and the second surface having a surface is formed with a receiving plane that faces the tip of the welding convex portion and extends in a direction perpendicular to the pressurizing direction during vibration welding. The tip is welded to the receiving plane.

  According to the vehicle interior product of the present invention, the welding convex portion protruding in the pressurizing direction at the time of vibration welding is in contact with the receiving plane extending in the direction orthogonal to the pressurizing direction at the time of vibration welding to be vibration welded. Yes. Therefore, even when the design surface is greatly curved, it is possible to weld all the welding convex portions uniformly, and to prevent problems such as poor appearance.

It is a principal part perspective view in the motor vehicle interior explaining the use condition of the grab box door of one Example of this invention. It is principal part sectional drawing of the grab box door which concerns on one Example of this invention. It is a schematic plan view which shows the back surface side of the outer panel of the grab box door which concerns on one Example of this invention. It is principal part sectional drawing explaining the behavior change at the time of vibration welding in the conventional grab box door. It is principal part sectional drawing explaining the behavior change at the time of vibration welding in the grab box door which concerns on one Example of this invention.

  The vehicle interior goods of this invention are comprised from the outer panel and the inner panel. Since the outer panel has a design surface, sink marks may be generated on the design surface when the weld projection is formed on the outer panel. Therefore, it is desirable to form the welding projection on the inner panel. This welding convex part can be made into a boss shape, a rib shape, or the like. Hereinafter, the case where the welding convex part is formed in the inner panel is assumed and demonstrated.

  This welding convex part joins an outer panel and an inner panel integrally by welding the front-end | tip to the inner surface (surface opposite to a design surface) of an outer panel. When the welding convex portion is a welding rib, the vehicle interior product formed in this way is reinforced by a welding rib that connects the outer panel and the inner panel, and has a hollow portion defined by the welding rib, so that it is lightweight. .

  It is desirable to form a misregistration prevention rib on the back surface side of the outer panel in order to prevent the welding projection from falling and shifting the welding position. However, in order to prevent the occurrence of sink marks on the design surface, it is desirable to make the volume of the misregistration prevention rib as small as possible.

  The inner surface of the outer panel has a first surface and a second surface where tangents intersect each other. In other words, it has a substantially cross-sectional shape or a circular arc shape. Therefore, the surface which connects the front-end | tips of the several welding convex part which protrudes from an inner panel becomes a cross-sectional substantially square shape or cross-sectional arc shape along the inner surface of an outer panel.

  The plurality of welding protrusions protruding from the inner panel protrude in parallel with each other in the pressurizing direction during vibration welding. Therefore, for example, when the welding protrusion is formed so as to protrude perpendicular to the first surface, the welding protrusion facing the second surface intersects the second surface at an angle other than a right angle. Become. In this case, the welding convex part which opposes the 2nd surface becomes easy to fall down to an acute angle side.

  Therefore, according to the present invention, in this case, a receiving plane is formed on the second surface that faces the tip of the welding convex portion and extends in a direction orthogonal to the pressurizing direction during vibration welding. Therefore, at the time of vibration welding, the welding convex portion abuts in a state perpendicular to the receiving plane and is welded to the receiving plane by being vibrated while being pressed, so that the falling is reliably prevented. As a result, the second surface is also welded in the same manner as the first surface, and all the welding convex portions can be welded uniformly.

  The receiving plane can be a tip surface of a boss-like convex portion, a bottom surface of a recess, a tip surface of a rib, or the like. However, in order to prevent the occurrence of sink marks on the design surface of the outer panel, it is desirable to form a rib having a low height and to form a receiving plane on the tip surface.

  In addition, the receiving plane should be formed at a position where the angle (θ shown in FIG. 5) formed by the protruding direction of the welding projection (pressure direction during vibration welding) and the tangent to the welding surface of the outer panel is 25 to 60 °. It is desirable that the angle be 30 to 50 °. If the angle exceeds 60 °, the weld rib does not easily fall even if a receiving plane is not formed. If it is formed at a location less than 25 °, the weld rib may fall.

  Hereinafter, the present invention will be described specifically by way of examples.

  In this embodiment, as shown in FIG. 1, the present invention is applied to a grab box door 1 of a vehicle. The grab box door 1 includes an outer panel 2 and an inner panel 3 as shown in cross section in FIG.

  The inner panel 3 is formed from polypropylene by injection molding, and includes a plate-like base material 30 and a plurality of welding ribs 31 protruding from the back surface of the base material 30 that is the side facing the outer panel 2. The plurality of welding ribs 31 are formed in a lattice shape that protrudes in the pressing direction during vibration welding.

  The outer panel 2 includes a plate-like base material 20 formed by injection molding from polypropylene, a urethane foam layer 21 integrally laminated on the surface of the base material 20, and a monolithic laminate on the surface of the urethane foam layer 21. And an outer skin layer 22. The skin layer 22 covers the end of the base material 20 and is wound up to the back surface side.

  As shown in FIG. 3, a plurality of misalignment prevention ribs 23 are formed on the back surface of the base material 20 opposite to the surface on which the urethane foam layer 21 is formed. The welding rib 31 is welded to the base material 20 of the outer panel 2 between the misalignment prevention ribs 23, and the outer panel 2 and the inner panel 3 are firmly joined.

  The substrate 20 of the outer panel 2 is formed in an arc shape in cross section, and on the surface thereof, a first surface A having a large radius of curvature of the arc of the cross section, and a radius of curvature of the arc of the cross section smoothly connected to the first surface A And a small second surface B. As a matter of course, the first surface A and the second surface B have tangent lines crossing each other.

  When vibration welding is performed, the outer panel 2 and the inner panel 3 are overlapped as shown in FIG. 2, and the plurality of welding ribs 31 respectively contact the base material 20 of the outer panel 2 between the misalignment prevention ribs 23. Touch. In this state, the outer panel 2 and the inner panel 3 are pressurized in the protruding direction of the plurality of welding ribs 31 and are welded by applying vibration in a direction perpendicular to the paper surface of FIG. Therefore, on the first surface A, the welding rib 31 and the surface of the substrate 20 are in contact with each other substantially perpendicularly, but on the second surface B, the welding rib 31 is in contact with the surface of the substrate 20 at an angle.

  Here, when the conventional grab box door has such a shape, as shown in FIG. 4, the welding rib 31 in contact with the second surface B at the time of pressurization falls down, and the first surface A and the first There is a problem that welding is not uniform between the two surfaces B.

  Therefore, in this embodiment, as shown in FIGS. 3 and 5, a portion where the angle θ formed by the protruding direction of the welding rib 31 (the pressing direction during vibration welding) and the tangent to the welding surface of the substrate 20 is 40 °. Thus, between the misalignment prevention ribs 23 on the second surface B, the receiving ribs 25 extending in the direction perpendicular to the paper surface are formed with the receiving planes 24 extending in the direction orthogonal to the pressing direction. The receiving ribs 25 are respectively formed at both ends of the base material 20 in the vibration direction. Therefore, during pressurization, the welding rib 31 is in contact with the receiving surface 24 perpendicularly, so that it is prevented from falling down and can be vibrated and welded to the substrate 20 in the same manner as the welding on the first surface A. In this embodiment, the receiving rib 25 is also formed at the end of the first surface A.

  Therefore, according to the grab box door of this embodiment, even if the outer panel 2 and the inner panel 3 are vibration welded in the same manner as in the prior art, all the welding ribs 31 can be welded uniformly. It has excellent appearance quality.

  The vehicle interior product of the present invention can be used not only for a grab box door but also for all vehicle interior products having an outer panel and an inner panel.

1: Grab box door 2: Outer panel
24: Receiving plane 3: Inner panel
31: Welding rib (welding convex part)

Claims (2)

It consists of an outer panel made of a resin molded body having a design surface, and an inner panel integrated with the outer panel by vibration welding,
A plurality of welding projections projecting in the pressurizing direction at the time of vibration welding are formed on one inner surface of the outer panel and the inner panel,
The other inner surface of the outer panel and the inner panel has a first surface and a second surface where tangents in cross section intersect each other,
At least one of the first surface and the second surface is formed with a receiving plane facing the tip of the welding convex portion and extending in a direction perpendicular to the pressurizing direction during vibration welding. A vehicle interior product characterized in that a tip is welded to the receiving plane.   The vehicle interior product according to claim 1, wherein the welding projection is formed on the inner panel, and the receiving plane is formed on the outer panel.

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