JP2006021614A - Mounting structure of energy absorptin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide mounting structure of energy absorptin material for firmly mounting the energy absorptin material onto a member such as a trim, eliminating peeling or cracking on the energy absorptin material even when a warp occurs in the member, and having excellent durability. <P>SOLUTION: A seat part 2 is provided on the trim 1, and the energy absorptin material 3 is attached to the seat part 2. The energy absorptin material 3 has a pad 4 made of a synthetic resin foam such as foaming urethane, and a female member 5 incorporated therewith when the pad 4 is foam-molded. In order to attach the energy absorptin material 3 to the trim 1, the energy absorptin material 3 is brought close to the trim 1 while a male member 6 is attached to the seat part 2, and an upper end of a head part 14 of the male member 6 is inserted in each female member 5. When the energy absorptin material 3 is strongly pressed toward the trim 1, a projecting part 14a is elastically deformed so as to be retreated to a space part 14c side, and the head part 14 enters the inside of an insertion part 19. When the projecting part 14a passes through an inward flange 18 as a step part, the projecting part 14a is elastically restored into an original shape, and an inner peripheral edge part of the inward flange 18 is held between the projecting part 14a and a third flange 13. Space S is formed between the energy absorptin material 3 and trim 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an attachment structure for an EA material (impact energy absorbing material), and more particularly to an attachment structure for an EA material suitable for application to a trim of an automobile.

  An EA material made of hard urethane is attached to a door trim of an automobile for energy absorption (EA) at the time of a side collision (side collision). As a method of attaching a hard urethane EA material to the door trim, Japanese Patent Application Laid-Open No. 2001-322507 describes a structure shown in FIGS. FIG. 6 is a cross-sectional view showing the EA material mounting structure described in FIG. 7 of the publication, FIG. 7 (a) is a perspective view of the cap 20 used in this structure, and FIG. 7 (b). FIG. 3 is a cross-sectional perspective view of the cap 20.

  The cap 20 is integrally provided with a cylindrical portion 21 and an overhang portion 22. A claw portion 23 is provided inward from the tip of the tube portion 21. A concave portion 27 is provided on the outer peripheral surface of the rod 26 protruding from the trim 31, and the claw portion 23 is engaged with the concave portion 27.

  Note that a slit 24 extends from the tip of the tube portion 21 in a direction parallel to the axial center line of the tube portion 21, and the tube portion 21 can be elastically deformed in the diameter increasing direction.

  To attach the EA material 33 to the trim 31, place the EA material 33 along the surface of the trim 31 so that the rod 26 is inserted into the attachment hole 34 of the EA material 33, and then fit the cap 20 to the rod 26. The claw portion 23 is engaged with the concave portion 27 by pushing. Thereby, the overhanging portion 22 presses the peripheral edge portion of the mounting hole 34 of the EA material 33.

  The cylindrical portion 21 has a tapered shape that is easy to insert into the mounting hole 34. When the cap 20 is attached to the rod 26, the outer peripheral surface of the cylindrical portion 21 is in close contact with the inner peripheral surface of the mounting hole 34.

  As another conventional example, an EA material mounting method shown in FIG. 5 is known.

  In this conventional example, a clip 52 is integrally provided on an EA material 51 made of hard urethane or the like. As shown in FIG. 5 (d), the clip 52 is provided with flanges 54, 54 at both ends of the cylindrical portion 53. The clip 52 is integrated with hard urethane or the like by being attached to a mold when the EA material 51 is foam-molded.

The clip 52 is provided on the overhanging portion 51 a of the EA material 51. As shown in FIGS. 5A and 5B, the EA material 51 is overlapped with the trim 55 so that the columnar protrusion 56 protruding from the trim 55 is inserted into the clip 52. The protrusion 56 is made of a thermoplastic resin such as polyethylene or polypropylene. Next, a welding jig (not shown) is pressed against the tip of the projection 56, and the tip of the projection 56 is enlarged in a substantially disk shape as shown in FIG. 5 (c) to form a flange-like pressing portion 56a. Thereby, the EA material 51 is fixed to the trim 55.
JP 2001-322507 A

  In the attachment structure of the EA material shown in FIGS. 5 and 6 and 7, since both the EA materials 51 and 33 are firmly fixed to the trims 55 and 31 and rigidly fixed, Although the mounting strength of the EA material is high, when the trim 55, 31 is warped, a strong force is applied to the side portion of the EA material in a direction away from the trim 55, 31. As a result, the EA material 33 may be peeled off from the trim 31 in the EA material mounting structure shown in FIGS. In the EA material mounting structure shown in FIG. 5, a large shear stress is applied in the direction perpendicular to the trim 55 near the base of the overhang 51a, and cracks occur near the base of the overhang 51a. There is a fear.

  Note that such a concave warp of the trim is caused by an impact when the door is opened and closed.

  The present invention solves the above-described conventional problems, and the EA material is excellent with respect to a member such as a trim, and even if the member is warped, the EA material does not peel or crack, and has excellent durability. It aims at providing the attachment structure of a material.

  The attachment structure of the EA material of the present invention (Claim 1) is the structure in which the EA material is attached to the member, and the EA material is attached to the pedestal portion by providing the pedestal portion on the member. A gap is formed between the first member and the second member.

  The attachment structure of the EA material according to claim 2 is the attachment structure of the EA material according to claim 1, wherein a male member is attached to the pedestal portion, a female member is provided on the EA material, and the male member and the female member are engaged with each other. Is attached to the pedestal.

  The attachment structure of the EA material according to claim 3 is the attachment structure according to claim 2, wherein the female member has an insertion portion into which the male member is inserted, and a step portion provided in the insertion portion. Has an overhanging portion that projects in the lateral direction of the insertion portion into the insertion portion, and the overhanging portion is engaged with the stepped portion.

  The attachment structure of the EA material according to claim 4 is characterized in that, in claim 3, the overhanging portion is elastically deformable.

  The attachment structure of the EA material according to claim 5 is the structure according to any one of claims 2 to 4, wherein the EA material is integrated with a pad made of a synthetic resin foam and the pad during foam molding of the pad. It has the said female member, It is characterized by the above-mentioned.

  The attachment structure of the EA material of claim 6 is the attachment structure of any one of claims 2 to 5, wherein the male member is provided with an anchor portion, and the pedestal portion is provided with an engaging portion of the anchor portion. The male part is attached to the base part by engaging the anchor part with the engaging part.

  The attachment structure for the EA material according to claim 7 is characterized in that, in any one of claims 2 to 6, both the male member and the female member are made of synthetic resin.

  According to an eighth aspect of the present invention, there is provided the EA material mounting structure according to any one of the first to seventh aspects, wherein the member is a trim of an automobile.

  In the EA material mounting structure of the present invention, since a gap is formed between the EA material and the member, even if the member is warped, the EA material is not peeled off or cracked.

  In the present invention, it is preferable that a male member is provided in the pedestal portion, a female member is provided in the EA material, and the EA material is attached to the pedestal portion by engaging them. An insertion portion to be inserted into the insertion portion, and the male member has a projecting portion projecting in the lateral direction of the insertion direction into the insertion portion, By adopting a configuration in which the overhanging portion is engaged with the stepped portion, the EA material can be easily attached to the member. In this case, by making the overhanging portion elastically deformable, the EA material can be attached to the member very easily.

  In the present invention, the EA material can be easily manufactured by including a pad made of a synthetic resin foam and the female member integrated with the pad at the time of foam molding of the pad. .

  In the present invention, the male member is provided with an anchor portion, and the pedestal portion is provided with an engaging portion of the anchor portion. When the anchor portion engages with the engaging portion, the male portion is provided. By adopting a configuration in which the member is attached to the pedestal portion, it is easy to attach the male member to the pedestal portion.

  By making the male member and the female member made of a synthetic resin, the durability is improved.

  The attachment structure of the EA material of the present invention is extremely suitable for application to the attachment of the EA material to the trim.

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

  FIG. 1 is a longitudinal sectional view showing a mounting structure of an EA material according to the embodiment, FIG. 2 is a perspective view showing an EA material and a male member according to the embodiment, and FIG. 3 is a pedestal portion, a male member and FIG. 4 is an exploded perspective view showing the engagement relationship between the female members, and FIG. 4 is a longitudinal sectional view showing the engagement relationship between the pedestal portion, the male member, and the female member.

  As shown in FIG. 1, a pedestal 2 is provided on a trim 1 as a member, and an EA material 3 is attached to the pedestal 2. The EA material 3 includes a pad 4 made of a synthetic resin foam such as urethane foam, and a female member 5 integrated when the pad 4 is foam-molded. The EA material 3 is fixed to the trim 1 by inserting and locking the male member 6 attached to the pedestal portion 2 into the female member 5.

  As shown in FIG. 2, the EA material 3 is provided with a plurality of female members 5, and each female member 5 is connected to the pedestal portion 2 via a male member 6.

  As shown in FIGS. 3 and 4, the pedestal portion 2 includes a peripheral wall portion 7 rising from the trim 1, a top plate portion 8 connected to the upper end of the peripheral wall portion 7, and a slit 9 provided in the top plate portion 8. And a flat support piece 10 which rises from the trim 1 and whose upper end extends along the slit 9. In this embodiment, the peripheral wall portion 7 extends so that the shape facing the trim 1 is substantially U-shaped or semicircular. The top plate portion 8 is also U-shaped or semicircular, and a slit 9 extends in a direction orthogonal to the one side 8 a from one side 8 a not connected to the peripheral wall portion 7. The support piece 10 has a slightly lower standing height than the peripheral wall portion 7, and extends in the same direction as the slit 9.

  In the male member 6, a first flange 11, a second flange 12, and a third flange 13 are provided in three stages in parallel from the lower side, and a head portion 14 protrudes upward from the third flange 13. The head portion 14 is an undercut portion 14b with a lower portion along the third flange 13 and the upper side of the undercut portion 14b is an overhang portion 14a. In order to make the overhanging portion 14a elastically deformable in the narrow direction, a gap portion 14c is provided in the head portion 14. The gap portion 14c penetrates from one side surface of the head portion 14 to the other side surface. The overhanging portion 14a can be elastically deformed so as to recede into the gap portion 14c.

  In the male member 6, a portion between the first flange 11 and the second flange 12 is inserted into the slit 9 of the base portion 2, and both side edges of the slit 9 are sandwiched between the first flange 11 and the second flange 12. It is attached to the base part 2 by doing.

  The female member 5 includes a cylindrical portion 16, an outward flange portion 17 that is circumferentially provided outward from one end of the cylindrical portion 16 in the cylinder axial direction (the upper end in FIGS. 3 and 4), and a cylindrical axis of the cylindrical portion 16. An inward flange 18 is provided inward from the other end in the direction (the lower end in FIGS. 3 and 4). The inward flange 18 serves as a step for locking the overhanging portion 14a. A space in the cylindrical portion 16 serves as an insertion portion 19. The outward flange 17 functions as an anchor that prevents the female member 5 from being detached from the pad 4.

  In order to attach the EA material 3 including the female member 5 to the trim 1, the male member 6 is attached to the pedestal portion 2, the EA material 3 is approached toward the trim 1, and the male member is placed in each female member 5. 6 is inserted at the upper end of the head section 14. When the EA material 3 is strongly pressed toward the trim 1, the overhanging portion 14 a is elastically deformed so as to retract toward the gap portion 14 c, and the head portion 14 enters the insertion portion 19. When the overhanging portion 14a passes through the inward flange portion 18 as a stepped portion, the overhanging portion 14a elastically returns to its original shape, and as shown in FIG. 4, the overhanging portion 14a and the third flange 13 The inner peripheral edge of the inward flange 18 is held between them. Thereby, the EA material 3 is fixedly attached to the trim 1.

  In this EA material mounting structure, as shown in FIG. 1, a gap S corresponding to the standing height of the pedestal 2 exists between the EA material 3 and the trim 1. Therefore, even if the trim 1 is warped, the EA material 3 is not dropped from the trim 1 or the EA material 3 is not cracked.

  In this embodiment, the EA material 3 can be attached to the trim 1 by a so-called one-touch operation in which the EA material 3 is pushed toward the trim 1, and the attachment workability of the EA material 3 is good.

  The above embodiment is an example of the present invention, and the present invention may take forms other than those shown in the drawings. For example, the number of female members 5 and male members 6 may be more or less than shown. Moreover, the thing of shapes other than illustration may be employ | adopted as a female member and a male member.

  The shape of the EA material 3 is not limited to the illustrated one.

It is a longitudinal cross-sectional view which shows the attachment structure of the EA material which concerns on embodiment. It is a perspective view which shows EA material and male member which concern on embodiment. It is a disassembled perspective view which shows the engagement relationship of a base part, a male member, and a female member. It is a longitudinal cross-sectional view which shows the engagement relationship of a base part, a male member, and a female member. It is sectional drawing which shows a prior art example. It is sectional drawing which shows another prior art example. It is explanatory drawing of the cap used for the prior art example of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trim 2 Base part 3 EA material 4 Pad 5 Female member 6 Male member 9 Slit 10 Bearing piece 11, 12, 13 Flange 14 Head part 14a Overhang | projection part 18 Inward flange part (step part)
19 Insertion section

Claims (8)

In the structure where EA material is attached to the member,
A mounting structure for an EA material, wherein a pedestal portion is provided on the member, and a gap is formed between the EA material and the member by attaching the EA material to the pedestal portion.   The male member is attached to the pedestal portion, the female member is provided on the EA material, and the EA material is attached to the pedestal portion by engagement between the male member and the female member. EA material mounting structure.   3. The female member according to claim 2, wherein the female member has an insertion portion into which the male member is inserted, and a step portion provided in the insertion portion, and the male member is on the side in the insertion direction into the insertion portion. An EA material mounting structure characterized by having an overhanging portion projecting in a direction, and the overhanging portion engaging with the stepped portion.   4. The EA material mounting structure according to claim 3, wherein the overhanging portion is elastically deformable.   5. The EA material according to claim 2, wherein the EA material includes a pad made of a synthetic resin foam and the female member integrated with the pad during foam molding of the pad. EA material mounting structure.   6. The male member according to claim 2, wherein an anchor portion is provided on the male member, an engaging portion of the anchor portion is provided on the pedestal portion, and the anchor portion is the engaging portion. The EA material mounting structure is characterized in that the male member is attached to the pedestal portion by engaging with the EA material.   7. The EA material mounting structure according to claim 2, wherein both the male member and the female member are made of synthetic resin.   8. The EA material mounting structure according to claim 1, wherein the member is an automobile trim.

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