JP2009051469A - Reinforcing structure of vehicular interior trim board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a reinforcing member arranged in an interior trim board from rattling by vibration during vehicle traveling. <P>SOLUTION: A long-length rigid core material 13 is placed in the space (S) between a first resin panel 3 and a second resin panel 5. On inner surfaces of the first resin panel 3 and the second resin panel 5, supportive ribs 19 are which abut on and support the rigid core material 13 protrusively integrally provided extending toward the opposing panel sides. The rigid core material 13 has an abut portion 27 that abuts on the tip of the supportive ribs 19, and opposite surfaces 31 that approach and oppose both the inner surfaces of the panels so that spaces (C) can be held between both the inner surfaces of the first resin panel 3 and the second resin panel 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in a reinforcing structure of a vehicle interior board in which a first resin panel and a second resin panel are integrated so as to have a space inside.

In Patent Document 1, as a reinforcing structure for an interior board for a vehicle, a floor lid body is blow-molded so as to have a linear cavity inside, and a pipe member is inserted into the cavity of the floor lid body. A reinforcing structure for a reinforced floor lid is disclosed. In this floor lid, the pipe member is fixed by a small protrusion protruding into the cavity so as not to move.
JP-A-11-115687 (paragraph 0009 column, paragraph 0010 column, paragraph 0013 column, FIGS. 3 and 4)

  However, even if the pipe member is pressed by a small protrusion and fixed so as not to move as in Patent Document 1 above, if the flat portion of the floor lid vibrates due to a change in the road surface during vehicle travel, etc. Vibration is transmitted to the pipe member, and the pipe member flutters in the hollow portion, and abnormal noise is generated.

  The present invention has been made in view of the above points, and an object of the present invention is to prevent the reinforcing member disposed in the interior board from fluttering due to vibration during traveling of the vehicle.

  In order to achieve the above object, the present invention is characterized in that the reinforcing member is disposed in the interior board in a non-contact state with the inner surface thereof.

  Specifically, the present invention is directed to a vehicle interior board reinforcing structure in which a first resin panel and a second resin panel are integrated so as to have a space therein, and the following solution is taken. It was.

  That is, according to the first aspect of the present invention, a long metal rigid core material is disposed in a space between the first resin panel and the second resin panel, and the first resin panel and the second resin are arranged. Support ribs for abutting and supporting the rigid core member are integrally projected toward the opposite panel side on both panel inner surfaces of the panel, and the rigid core member has a contact portion with which the tip of the support rib abuts. The first resin panel and the second resin panel are provided with opposing surface portions that are close to and face the inner surfaces of the panels so as to have a gap between the inner surfaces of the first resin panel and the second resin panel.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, a plurality of support ribs are provided in a straight line in the longitudinal direction of the rigid core member.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the first resin panel and the second resin panel are integrated by vibration welding, and the rigid core material and the support rib are both vibration welded. The contact portion of the rigid core material extends in the longitudinal direction of the rigid core material.

  According to the first aspect of the present invention, the rigid core material is stably supported by the support ribs in the space between the first resin panel and the second resin panel by the support rib tips coming into contact with the contact portions. Since the opposing surface portions are close to the inner surfaces of both the first resin panel and the second resin panel with a gap therebetween, both panel surfaces of the interior board are caused by a change in the road surface during vehicle travel. Even if the panel vibrates, both panel surfaces do not come into contact with the rigid core material, and the rigid core material has no flutter due to vibration transmission of both panel surfaces, and no abnormal noise is generated.

  Further, when a load is applied to the panel surface of the interior board, the support rib is bent and the opposing surface portion of the rigid core member receives the panel surface, so that no further load is applied to the support rib and the support rib. It is difficult for the surface of the panel corresponding to the mark to be caused by the reaction force of bending, and the interior board can be stably supported by the rigid core material. In addition, since the load is distributed in a surface contact state between the facing surface portion of the rigid core and the panel inner surface, the surface of the panel corresponding to the facing surface portion is unlikely to be marked by a reaction force of the load.

  According to the invention which concerns on Claim 2, each support rib is short compared with a long continuous thing, and it is easy to bend, and it can make it difficult to attach the trace by the reaction force of a bend to the panel surface corresponding to a support rib. it can.

  According to the invention of claim 3, even if there is a slight variation in the dimensional accuracy of the first resin panel, the second resin panel, and the rigid core material, the protruding dimension of the support rib is increased in consideration of this dimensional error. Since the tip of the support rib melts by friction with the rigid core during vibration welding, the variation in the dimensional accuracy can be absorbed and the rigid core can be reliably abutted and supported by the support rib.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 to 3 show a substantially rectangular package tray 1 as a vehicle interior board to which a reinforcing structure according to Embodiment 1 of the present invention is applied. The package tray 1 is composed of a first resin panel 3 and a second resin panel 5 and is configured to be welded and integrated so as to have a space S inside by vibrating them in a state where they are in pressure contact. . In FIG. 3, broken lines indicated by reference sign L are welding lines, and in this example, five welding lines L are provided in parallel along the longitudinal direction of the package tray 1.

  A skin 7 made of non-woven fabric is integrally attached to the surface of the first resin panel 3 from the viewpoint of improving appearance (see FIGS. 1 and 2), and is gripped at the center of one long side. A concave portion 9 is formed. A fitting recess 11 is formed on both short sides of the second resin panel 5, and the fitting recess 11 is detachably fitted to a support pin formed on a side trim of a cargo compartment at the rear of the hatchback vehicle body, for example. By combining them, the cargo compartment is divided into upper and lower parts by the package tray 1. In FIG. 3, the skin 7 is not shown for convenience.

  In the space S between the first resin panel 3 and the second resin panel 5, two long metal rigid cores 13 are counted between the second and third welding lines L counted from the recess 9 side. And corresponding to between the 4th and 5th welding line L, it arrange | positions over the whole longitudinal direction of the package tray 1 so that it may extend in parallel with the vibration direction B (longitudinal direction of the package tray 1) at the time of vibration welding. Yes. These rigid core materials 13 are made of, for example, Al or Fe, and in this example, the extruded material made of Al has a substantially X-shaped longitudinal section.

  The first resin panel 3 includes a solid layer 15 having a high resin density and a hard resin layer formed on the outer surface, and a foam layer 17 having a resin density lower than that of the solid layer 15 formed therein. On the solid layer 15 on the inner surface of the first resin panel 3, support ribs 19 for abutting and supporting the rigid core material 13 correspond to the rigid core materials 13 in the vibration direction B (package tray at the time of vibration welding). 1 projecting one by one toward the opposing panel (second resin panel 5) side so as to extend in the longitudinal direction of 1. These support ribs 19 are slightly shorter than the rigid core 13 and do not reach both short sides of the package tray 1. The reason for this is that the vicinity of both short sides of the package tray 1 has side walls at the end portions, so that the rigidity is higher than that in the middle, and it is difficult to bend without the rigid core 13.

  Further, four boss-like protrusions 21 are located on both sides of the support rib 19 on both short sides of the package tray 1 in the solid layer 15 on the inner surface of the first resin panel 3. Each is protruded integrally with a gap. These support ribs 19 and protrusions 21 are made of the same solid as the solid layer 15.

  As described above, the first resin panel 3 in which the solid layer 15 is formed on the outer surface, the foam layer 17 is formed inside, and the support rib 19 and the protruding portion 21 are integrally projected on the solid layer 15 is, for example, Molded as follows.

  First, during molding, a foaming promoting substance such as a chemical foaming material that generates gas by a chemical reaction or an inert gas (physical foaming material) such as carbon dioxide gas and nitrogen gas, and fibers such as glass fiber are mixed. A thermoplastic resin (eg, polypropylene) is prepared.

  Then, this thermoplastic resin is injected and filled into the cavity of the mold in the mold closed state. On the molding surface of this mold, a concave groove corresponding to the support rib 19 of the first resin panel 3 and a concave corresponding to the protrusion 21 are formed. In the cavity, the thermoplastic resin is solidified and a skin layer is generated in the vicinity of the molding surface of the mold. This skin layer has not yet fully solidified.

  Next, in the process of solidifying the thermoplastic resin, the cavity volume is expanded by, for example, twice or more. At this stage, the portion of the thermoplastic resin that is in contact with the molding surface of the mold is cooled early due to the influence of the mold temperature, so that the outer layer becomes a solid layer 15 having a high resin density and no voids. Constitute. On the other hand, the inner part of the thermoplastic resin is hardly affected by the mold temperature and is in a highly viscous gel state.

  Therefore, the expansion of the cavity volume causes the thermoplastic resin that has been compressed in the mold until now to be pulled to the molding surface of the mold, and expands and expands due to the gas generated by the chemical reaction in the thermoplastic resin, an inert gas, or the like. To do. At this time, the fibers in the thermoplastic resin are also elastically restored by reducing the compression, and the thermoplastic resin expands also by this elastic restoring force (spring back phenomenon).

  As a result, the solid layer 15 having a high resin density and no voids is formed on the outer surface, and the foamed layer 17 has a large number of voids (not shown) inside and a lower resin density than the solid layer 15. The first resin panel 3 formed with is molded. In addition, two support ribs 19 are integrally provided on the solid layer 15 on the inner surface of the first resin panel 3, and four protrusions 21 are provided at both ends in the longitudinal direction of the support ribs 19. It is protruded integrally corresponding to. And this 1st resin panel 3 can achieve weight reduction compared with the case where it does not have the foaming layer 17 but consists only of the solid layer 15 with high resin density. It is not always necessary to mix fibers such as glass fibers in the thermoplastic resin. Moreover, you may perform foaming expansion of a thermoplastic resin only by the elastic restoring force by fibers, such as glass fiber.

  On the other hand, the second resin panel 5 does not have the foam layer 17 as in the first resin panel 3 and is made of a hard solid as a whole, and the inner surface of the panel is similar to the support rib 19 of the first resin panel 3 as described above. The first resin panel 3 has a support rib 19 that abuts and supports the rigid core member 13 so as to extend in a vibration direction B (longitudinal direction of the package tray 1) during vibration welding corresponding to each of the rigid core members 13. One piece is integrally projected toward the opposite panel (first resin panel 3) side so as to face the supporting ribs 19. These support ribs 19 are slightly shorter than the rigid core 13 and do not reach both short sides of the package tray 1, which is the same as the support ribs 19 of the first resin panel 3.

  In addition, on the short side of the package tray 1 on the panel inner surface of the second resin panel 5, four boss-shaped protrusions 21 are positioned on both sides of the support rib 19, and the first The resin panel 3 is integrally projected with a gap so as to face the protrusion 21.

  Further, on the inner surface of the second resin panel 5, five welding ribs 23 are integrally parallel to each other so as to extend in the vibration direction B during vibration welding corresponding to the five welding lines L of the package tray 1. Projected. These welding ribs 23 are stably supported by a plurality of reinforcing ribs 25 from both sides so as not to be laterally shaken during vibration welding.

  As shown in FIG. 4, the rigid core member 13 is positioned at the center in the thickness direction of the space S inside the package tray 1, and the tips of the support ribs 19 of the first resin panel 3 and the second resin panel 5 are in contact therewith. The contact part 27 which contacts is provided, and the contact part 27 extends in the longitudinal direction of the rigid core member 13.

  The abutment portion 27 is inclined with respect to the inner surfaces of the first resin panel 3 and the second resin panel 5, and four vertical wall portions 29 are formed from both ends of the first resin panel 3 and the second resin panel 5. 2 The opposing surface portion that extends toward the inner surface of the resin panel 5 and faces the inner surface of both the first resin panel 3 and the second resin panel 5 from the extended end portion of each vertical wall portion 29. 31 extends in parallel with the inner surface of the panel so that a gap C is formed between the inner surfaces of the two panels so as to abut against the protrusions 21 at both ends in the longitudinal direction.

  Then, the first resin panel 3 is set on the lower vibration welding jig so that the support rib 19 and the protruding portion 21 face upward, and the rigid core member 13 is placed thereon and abuts on the support rib 19. While supporting the part 27, the opposing surface part 31 is supported by the projection part 21. FIG. On the other hand, the second resin panel 5 is set on the upper vibration welding jig so that the support rib 19, the protrusion 21 and the welding rib 23 face downward, and the support rib 19 is attached to the contact portion 27 of the rigid core member 13. While making it oppose, the protrusion part 21 is made to oppose the opposing surface part 31 of the rigid core material 13. FIG. From this state, the upper vibration welding jig is pressed against the lower vibration welding jig from above, and the front end surface of the welding rib 23 of the second resin panel 5 is pressed against the solid layer 15 on the inner surface side of the first resin panel 3. Then, the upper vibration welding jig is vibrated in the longitudinal direction of the package tray 1.

  As a result, the tip of the welding rib 23 melts itself while melting the solid layer 15 by pressure contact vibration with the solid layer 15, and the first resin panel 3 and the second resin panel 5 are welded and integrated. . At this time, the tips of the support ribs 19 of the first resin panel 3 and the second resin panel 5 are in pressure contact with the contact portion 27, and the protrusion 21 is in pressure contact with the facing surface portion 31.

  In FIG. 1, 33 is a molten resin portion where the tip of the welding rib 23 and the solid layer 15 of the first resin panel 3 are melted and raised during vibration welding, and 35 is the tip of the support rib 19 which is melted by pressure welding during vibration welding. It is a Bali made. In addition, although the burr | flash is similarly formed also in the projection part 21, since it is few compared with the support rib 19 side, it is not illustrated.

  As described above, in the first embodiment, the tips of the support ribs 19 of the first resin panel 3 and the second resin panel 5 are brought into contact with both sides of the contact portion 27 of the rigid core material 13, and The opposing surface portion 31 is brought into contact with the projections 21 of the first resin panel 3 and the second resin panel 5, and the rigid core material 13 is connected to the first resin panel 3 and the second resin by the support ribs 19 and the projections 21. It arrange | positions in the space S between the panels 5 in the stable state, and the opposing surface part 31 has opened the clearance gap C with the both panel inner surfaces of the 1st resin panel 3 and the 2nd resin panel 5. FIG. Therefore, even if both panel surfaces of the package tray 1 vibrate due to a change in the road surface during traveling of the vehicle, the two panel surfaces do not come into contact with the rigid core material 13, and the rigid core material 13 transmits vibrations between the two panel surfaces. There is no fluttering due to noise and no abnormal noise occurs.

  Furthermore, in the first embodiment, as shown in FIG. 5, when a load P acts on the panel surface of the package tray 1 from above, both the support ribs 19 of the first resin panel 3 and the second resin panel 5 are bent and rigid. Since the opposing surface portion 31 of the core member 13 receives both the panel surfaces of the first resin panel 3 and the second resin panel 5, no further load P acts on the both support ribs 19, and both support ribs 19. It is difficult for the surface of the panel corresponding to 1 to be marked by a reaction force of bending, and the package tray 1 can be stably supported by the rigid core member 13. Further, since the load P is dispersed in a surface contact state between the facing surface portion 31 of the rigid core member 13 and the inner surface of the panel, the surface of the panel corresponding to the facing surface portion 31 is unlikely to be marked by the reaction force of the load P. Since the contact portion 27 is inclined, the support rib 19 can be easily bent while sliding on the inclined surface of the contact portion 27 by the action of the load P.

  In the first embodiment, the rigid core material 13 and the support rib 19 are both extended in the vibration direction B during vibration welding, and the contact portion 27 of the rigid core material 13 is extended in the longitudinal direction of the rigid core material 13. Therefore, even if there is some variation in the dimensional accuracy of the first resin panel 3 and the second resin panel 5 and the rigid core material 13, the projection dimension of the support rib 19 should be long in consideration of this dimensional error. Thus, the tip of the support rib 19 is melted by friction with the rigid core member 13 during vibration welding, so that the variation in the dimensional accuracy can be absorbed and the rigid core member 13 can be reliably abutted and supported by the support rib 19.

(Embodiment 2)
6 and 7 show a package tray 1 to which a reinforcing structure according to Embodiment 2 of the present invention is applied.

  In the second embodiment, the package tray 1 is configured by integrating the first resin panel 3 and the second resin panel 5 by vibration welding, and the skin 7 made of nonwoven fabric is integrally formed on the surface of the first resin panel 3. It is attached, the solid layer 15 is formed on the outer surface of the first resin panel 3, the foam layer 17 is formed inside, and the welding rib 23 extends on the inner surface of the second resin panel 5 in the vibration direction. As described above, the protrusions are integrally formed in the same manner as in the first embodiment. However, the length and the protruding position of the support rib 19 and the structure of the rigid core member 13 are different from those in the first embodiment.

  In other words, in the first embodiment, the support ribs 19 are provided so as to protrude from both inner surfaces of the first resin panel 3 and the second resin panel 5, but in the second embodiment, the support ribs are provided on the inner surface of the first resin panel 3. 19 is protruded, and two support ribs 19 are provided on the inner surface of the second resin panel 5 so as to sandwich the support rib 19 of the first resin panel 3 from both sides. Close to the inner surface of the other panel. Further, in the rigid core material 13 of the second embodiment, the abutting portion 27 and the facing surface portion 31 are also used.

  That is, the contact portion 27 (opposing surface portion 31) that is positioned parallel to the inner surface of the second resin panel 5 and the both end edges of the corresponding contact portion 27 (facing surface portion 31) approach the inner surface of the first resin panel 3. A rigid core material in a substantially U shape with a vertical wall portion 29 extending in parallel and a contact portion 27 (opposing surface portion 31) extending from both the vertical wall portions 29 in parallel to the panel inner surface of the first resin panel 3 13 is constituted. In the second embodiment, since the rigid core member 13 is stably supported by the three support ribs 19, the protrusion 21 employed in the first embodiment is not necessary. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In vibration welding, the center abutment portion 27 (opposing surface portion 31) of the rigid core member 13 is faced up so that the portion is supported by the support rib 19 of the first resin panel 3, and the second resin panel 5 is supported. The tips of the two support ribs 19 are brought into contact with the two contact portions 27 (opposing surface portions 31) on both sides of the rigid core member 13. The first resin panel 3 and the second resin panel 5 are welded and integrated by vibration welding as shown in FIG.

  Therefore, in the second embodiment, the same function and effect as in the first embodiment can be achieved.

  Further, in the second embodiment, since the support rib 19 is about twice as long as that in the first embodiment, as shown in FIG. 8, when the load P acts on the panel surface of the package tray 1, it is easily bent. As compared with the first embodiment, the panel surface corresponding to the support rib 19 is less likely to have a mark due to the reaction force of bending.

  In each of the above-described embodiments, the support rib 19 is constituted by a long continuous body that is linearly continuous in the longitudinal direction of the rigid core member 13. It may be arranged in a straight line in the direction. And according to this, each support rib 19 is short compared with said each embodiment, and it is easy to bend, and it can make it difficult to attach the trace by the reaction force of the bend to the panel surface corresponding to the support rib 19 further. .

  Further, as an example of the structure of the rigid core member 13, one example is given in each of the above embodiments, but both the contact portion 27 with which the tip of the support rib 19 abuts, both the first resin panel 3 and the second resin panel 5 are provided. As long as it has the opposing surface part 31 which approaches and opposes both panel inner surface so that it may have the clearance gap C between panel inner surfaces, it is not limited to said 2 example.

  Further, in each of the above-described embodiments, the case where the interior board is the package tray 1 has been shown, but the present invention can also be applied to other interior boards for vehicles such as a glove box lid and a trunk board.

  INDUSTRIAL APPLICABILITY The present invention is useful for a vehicle interior board reinforcing structure in which a first resin panel and a second resin panel are integrated so as to have a space inside.

It is sectional drawing in the II line | wire of FIG. It is sectional drawing in the II-II line | wire of FIG. It is a perspective view of the package tray to which the reinforcement structure concerning Embodiment 1 was applied. 2 is a perspective view of a rigid core material in Embodiment 1. FIG. FIG. 2 is a view corresponding to part A of FIG. 1 showing a state in which a load is applied to the panel surface of the package tray in the first embodiment. FIG. 5 is a diagram corresponding to a part A in FIG. 1 in Embodiment 2. FIG. 5 is a diagram corresponding to FIG. 4 of the second embodiment. FIG. 6 is a diagram corresponding to FIG. 5 of the second embodiment.

Explanation of symbols

1 Package tray (interior board)
3 First resin panel 5 Second resin panel 13 Rigid core material 19 Support rib 27 Contact portion 31 Opposing surface portion B Vibration direction C Clearance S Space

Claims (3)

A vehicle interior board reinforcing structure in which a first resin panel and a second resin panel are integrated so as to have a space inside,
In the space between the first resin panel and the second resin panel, a long metal rigid core material is disposed,
On both panel inner surfaces of the first resin panel and the second resin panel, support ribs for abutting and supporting the rigid core member are integrally projected toward the opposing panel side,
The rigid core member is opposed to the inner surface of both panels so that there is a gap between the contact portion with which the tip of the support rib contacts and the inner surfaces of both the first resin panel and the second resin panel. A vehicle interior board reinforcing structure, comprising: an opposing surface portion. In the reinforcement structure of the vehicle interior board according to claim 1,
A reinforcing structure for an interior board for a vehicle, wherein a plurality of support ribs are provided in a straight line in the longitudinal direction of the rigid core member. In the reinforcement structure of the vehicle interior board according to claim 1 or 2,
The first resin panel and the second resin panel are integrated by vibration welding,
Both of the rigid core material and the support rib extend in the vibration direction at the time of vibration welding, and the contact portion of the rigid core material extends in the longitudinal direction of the rigid core material. Reinforced structure.

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