JP2006022898A - Ea material and its mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an EA material of low cost capable of being easily mounted on a trim or the like, and its mounting structure. <P>SOLUTION: Three sheets of mounting plates 3 are integrally mounted on an EA material main body 2 composed of hard urethane or the like. The mounting plates 3 are placed near a rear face 2b of the EA material main body 2, and extended in the direction approximately in parallel with the rear face 2b. The rear face 2b of the EA material main body 2 is overlapped to the trim 5 in a state of internally inserting a columnar projection 6 projecting from the trim 5 into an opening 4 to mount the EA material on the trim 5. Then a welding tool (not shown in Figure) is pressed to a tip of the projection 6, and the tip of the projection 6 is expanded approximately into the disc-shape to form a flange-shaped pressing part 6a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  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 this door trim, Japanese Patent Application Laid-Open No. 2001-322507 describes the structure shown in FIGS. FIG. 9 is a cross-sectional view showing an EA material mounting structure described in FIG. 7 of the same publication, FIG. 10 (a) is a perspective view of a cap 50 used in this structure, and FIG. 10 (b). FIG. 3 is a cross-sectional perspective view of the cap 50.

  The cap 50 is integrally provided with a cylindrical part 51 and an overhang part 52. A claw portion 53 is provided inward from the tip of the tube portion 51. A concave portion 57 is provided on the outer peripheral surface of the rod 56 protruding from the trim 61, and the claw portion 53 is engaged with the concave portion 57.

  Note that a slit 54 extends from the tip of the cylindrical portion 51 in a direction parallel to the axial line of the cylindrical portion 51, and the cylindrical portion 51 can be elastically deformed in the diameter increasing direction.

  In order to attach the EA material 63 to the trim 61, the EA material 63 is placed along the surface of the trim 61 so that the rod 56 is inserted into the attachment hole 64 of the EA material 63, and then the cap 50 is fitted to the rod 56. The claw portion 53 is engaged with the concave portion 57 by pushing. Thereby, the overhanging portion 52 presses the peripheral edge portion of the attachment hole 64 of the EA material 63.

  The cylindrical portion 51 has a tapered shape and is easily inserted into the mounting hole 64. When the cap 50 is attached to the rod 56, the outer peripheral surface of the cylindrical portion 51 is in close contact with the inner peripheral surface of the mounting hole 64.

  As another conventional example, an EA material mounting method shown in FIG. 11 is known.

  In this conventional example, one mounting plate 73 is integrally provided on an EA material main body 72 made of hard urethane or the like. The mounting plate 73 is integrated with hard urethane or the like by being attached to a mold when the EA material 71 is foam-molded.

The mounting plate 73 is plate-shaped and has arm portions 73a, 73b, 73c extending in three directions. An opening 74 is provided on the tip side of each arm 73a, 73b, 73c. In the mounting plate 73, the distal ends of the arm portions 73 a, 73 b, 73 c protrude from the EA material main body 72, and the other portions are embedded in the EA material main body 72. As shown in FIG. 11 (c), the EA material 71 is superposed on the trim 75 so that the columnar protrusion 76 protruding from the trim 75 is inserted into the opening 74. The protrusion 76 is made of a thermoplastic resin such as polyethylene or polypropylene. Next, a welding jig (not shown) is pressed against the tip of the protrusion 76, and the diameter of the tip of the protrusion 76 is increased to a substantially disk shape to form a flange-like pressing portion 76a. Thereby, the EA material 71 is fixed to the trim 75.
JP 2001-322507 A

  In the EA material mounting structure shown in FIGS. 9 and 10, the cap 50 and the EA material 63 are separated from each other. Therefore, when the EA material is attached to the trim 61, the EA material is applied to the trim 61. And the work of fitting a separate cap 50 to the rod 56 thereafter, which requires time and effort.

  In the EA material mounting structure of FIG. 11, the mounting plate 73 needs to have a shape and a size corresponding to the size and shape of the EA material main body 72, so that each EA material main body having a different shape and size is used. The mounting plate must be manufactured. For this reason, the cost of a mounting plate increases and the cost of EA material also becomes high.

  An object of the present invention is to improve the workability of attaching an EA material to a member such as a trim, and to provide a low-cost EA material and an attachment structure for the EA material.

  The EA material of the present invention (Claim 1) is an EA material attached to a member, and has an EA material main body made of a synthetic resin foam, and a mounting plate protruding to the side of the EA material main body, In the EA material in which the mounting plate is fixed to the member, a plurality of small mounting plates are embedded in the base end side of each mounting plate in the EA material main body, and the tip end side of the mounting plate is the EA material main body. It is characterized by being installed to protrude to the side of the.

  The EA material of claim 2 is characterized in that, in claim 1, two or more mounting plates are provided so as to protrude in at least two directions from the EA material main body.

  The EA material according to claim 3 is characterized in that, in claim 1 or 2, the EA material body is made of urethane foam, and the mounting plate is made of resin such as urethane or nylon, press felt, or iron.

  The EA material according to claim 4 is characterized in that, in any one of claims 1 to 3, the mounting plates have the same shape.

  The EA material according to claim 5 is the EA material according to any one of claims 1 to 4, wherein a tip side portion of the mounting plate protruding from the EA material main body is flush with a surface facing the member of the EA material main body. Or at least a part of the base end side portion embedded in the EA material main body of the mounting plate is further away from the facing surface than the front end side portion. It is characterized by that.

  The EA material according to claim 6 is the EA material according to any one of claims 1 to 4, wherein the mounting plate is connected to the base end side portion embedded in the EA material main body and the base end side portion. The rising part which protrudes from the member opposing surface of EA material main body, and the said front end side part which continues to this rising part and protrudes to the side of EA material main body are characterized by the above-mentioned.

  The attachment structure of the EA material of the present invention (Claim 7) is a structure in which the EA material is attached to a member, and the EA material is the EA material according to any one of claims 1 to 6, and from the member The mounting plate is fixed to the protruding mounting member.

  In the EA material and the EA material mounting structure of the present invention, the mounting plate that protrudes laterally from the EA material is fixed to the mounting member that protrudes from the member such as the trim, thereby attaching the EA material to the member such as the trim. It is done.

  In this EA material, the mounting plate is a small piece, and a common mounting plate can be used even if the shape and size of the EA material main body are different. For this reason, the cost of a mounting plate can be made low and the cost reduction of EA material can be aimed at. In particular, in the present invention, the effect of cost reduction is great by making the mounting plates have the same shape.

  By providing this mounting plate so as to protrude from the EA material main body in at least two directions, the attachment of the EA material to the member is stabilized.

  As a material of the EA material body, urethane foam is suitable. In this case, it is preferable that the mounting plate is made of urethane resin, nylon, press felt, or iron having a good affinity (bondability, adhesion) with urethane foam.

  In the present invention, the tip side portion of the mounting plate that protrudes from the EA material main body is flush with the surface facing the member of the EA material main body, or is further away from the member, the mounting plate Among these, at least a part of the base end side portion embedded in the EA material main body may be separated from the facing surface rather than the tip end side portion. In this case, the EA material can be attached so that the EA material main body is brought into contact with the member.

  In the present invention, the mounting plate includes the base end side portion embedded in the EA material main body, the rising portion protruding from the member facing surface of the EA material main body, It is good also as a structure which has the said front end side part which continues to the part and protrudes to the side of the EA material main body. In this case, the EA material can be attached to the member such that a slight gap is provided between the EA material main body and the member. In this way, when a gap is provided between the EA material main body and the member, the EA material can be attached without any trouble even if there is a slight unevenness on the surface of the member.

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

  FIG. 1 (a) is a perspective view of the EA material 1 according to the first embodiment of the present invention, and shows the EA material from the same direction as FIG. 11 (a). 1 (b) is a cross-sectional view taken along line BB of FIG. 1 (a), FIG. 1 (c) is a perspective view of each mounting plate 3, and FIG. 1 (d) is a mounting structure of the EA material 1. FIG.

  In this embodiment, three mounting plates 3 are integrally provided on an EA material body 2 made of hard urethane or the like. The mounting plate 3 is integrated with hard urethane or the like by being attached to a mold when the EA material body 2 is foam-molded. When the EA material body 2 is made of hard urethane, the mounting plate 3 is preferably made of urethane resin, nylon, felt press, iron or the like having high affinity with hard urethane.

  The EA material main body 2 is a substantially rectangular disk shape having a front surface 2a, a rear surface 2b, and four side surfaces, and a mounting plate 3 projects from the three side surfaces. The mounting plate 3 is a small plate-like member, the proximal end side is embedded in the EA material main body 2, and the distal end side protrudes from the side surface of the EA material main body 2. An opening 4 is formed through the attachment plate 3 in the thickness direction. The EA material body 2 does not have to be rectangular, and may take various shapes such as a triangle, a polygon of pentagon or more, a circle, and an ellipse. Note that the number of mounting plates 3 may be four or more. In this embodiment, two of the three mounting plates 3 protrude in directions opposite to each other, and the remaining one protrudes in a direction substantially orthogonal thereto, but this protruding direction is limited to this. It is not a thing.

  In this embodiment, the mounting plate 3 is disposed in the vicinity of the rear surface 2b of the EA material body 2 and extends in a direction substantially parallel to the rear surface 2b. The distance from the mounting plate 3 to the rear surface 2b of the EA material body 2 (that is, the covering margin with the EA material body 2) is preferably about 1 to 10 mm.

  In order to attach the EA material 1 to the trim 5, as shown in FIG. 1 (d), the columnar protrusion 6 projecting from the trim 5 is inserted into the opening 4 and the EA material body 2 is attached. The rear surface 2 b is overlapped with the trim 5. The protrusion 6 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 6, and the tip of the projection 6 is expanded in a substantially disc shape to form a flange-like pressing portion 6a. Thereby, the EA material 1 is fixed to the trim 5.

  In this embodiment, three small-sized mounting plates 3 having the same shape are used, and a single mounting plate as shown in FIG. 11 is not employed. Accordingly, the common mounting plate 3 can be used even if the shape and size of the EA material body 2 are different, and the cost of the EA material 1 can be reduced by reducing the cost of the mounting plate.

  Although not shown, an opening may also be provided on the base end side of the mounting plate 3 (portion embedded in the EA material main body 2) as in the mounting plate shown in FIGS. Good. When the opening is provided on the base end side in this manner, the connection between the mounting plate 3 and the EA material main body 2 becomes strong due to the anchor effect.

  When the EA material 1 is attached to the trim 5, an article separate from the EA material such as the cap 50 shown in FIGS. 9 and 10 is unnecessary, and the attaching operation is easy.

  Other embodiments will be described with reference to FIGS.

  FIG. 2 (a) is a perspective view of a mounting plate used for the EA materials 1A and 1B according to the second and third embodiments, and FIG. 2 (b) is a BB line in FIG. 2 (a). FIG. 2C is a sectional view of the EA material 1A according to the second embodiment, and FIG. 2D is a sectional view of the EA material 1B according to the third embodiment.

  The mounting plate 10 includes a flat mounting plate main body 11 and an anchor piece 12 connected to the mounting plate main body 11 through a pair of leg pieces 13. An opening 14 is provided on the distal end side of the mounting plate body 11. The leg pieces 13 stand from both side pieces on the base end side of the mounting plate main body 11. The anchor piece 12 has a small flat plate shape and is disposed substantially parallel to the mounting plate main body 11. The mounting plate 10, like the mounting plate 3 of the EA material 1, has leg pieces 13 and anchor pieces 12 embedded in the EA material body 2 so as to protrude in three directions from the three side surfaces of the EA material body 2. ing.

  In the EA material 1A of FIG. 2 (c), the entire leg piece 13 and anchor piece 12 are embedded in the EA material main body 2. The mounting plate main body 11 is flush with the rear surface 2b of the EA material main body 2 on the side facing the trim. On the base end side of the mounting plate main body 11, the plate surface on the trim opposite side is flush with the rear surface 2 b of the EA material main body 2, and the other surfaces are in contact with the EA material main body 2.

  Although not shown, the EA material 1A is attached to the trim 5 via the protrusions 6 with the rear surface 2b of the EA material main body 2 superimposed on the trim 5 as shown in FIG. 1 (d). The protrusion 6 is inserted through the opening 14.

  In the EA material 1B of FIG. 2 (d), the tip of the leg piece 13 protrudes from the rear surface 2b, and the mounting plate main body 11 is separated from the rear surface 2b to the trim side. The mounting plate body 11 is disposed in parallel with the rear surface 2b.

  Although not shown, the EA material 1B is also attached to the trim by the projection 6 as shown in FIG. 1 (d). In the case of the EA material 1B of FIG. 2 (d), the mounting plate body 11 is separated from the rear surface 2b toward the trim side, and a slight gap is formed between the trim and the EA material body 2. For this reason, even if the trim is uneven, it can be absorbed.

  FIG. 3 (a) is a perspective view of the mounting plate 20 used for the EA materials 1C and 1D according to the fourth and fifth embodiments, and FIGS. 3 (b) and 3 (c) are the fourth and fifth views. It is sectional drawing of EA materials 1C and 1D which concern on embodiment.

  The mounting plate 20 includes a flat mounting plate main body 21 and an anchor piece 22 extending from the base end side of the mounting plate main body 21. In this embodiment, the anchor piece 22 crosses the mounting plate main body 21 obliquely.

  The crossing angle is preferably about 130 to 160 °. In this embodiment, the anchor piece 22 is branched into three strips, and three branch pieces 22a are provided. However, two or four or more branch pieces may be provided, or may not be branched. Good. An opening may be provided in the anchor piece 22. An opening 23 is provided on the distal end side of the mounting plate main body 21. The EA materials 1C and 1D are provided with three mounting plate bodies 21 so as to protrude in three lateral directions.

  In the EA material 1C of FIG. 3B, the mounting plate main body 21 protrudes from the side surface of the EA material main body 2, and the anchor piece 22 is embedded in the EA material main body 2. The mounting plate main body 21 may be embedded in the EA material main body 2 at the base end side, or the entire mounting plate main body 21 may protrude from the EA material main body 2. A part of the anchor piece 22 may protrude from the side surface of the EA material main body 2. As shown in FIG. 3 (b), the mounting plate main body 21 is arranged so as to be separated from the trim rather than the rear surface 2b of the EA material main body 2.

  In the EA material 1D of FIG. 3 (c), the mounting plate main body 21 is disposed on the trim side with respect to the rear surface 2b of the EA material main body 2. In FIG. 3 (c), the anchor piece 22 protrudes from the rear surface 2b of the EA material main body 2 to the trim side, but near the cross-convex corner portion between the side surface of the EA material main body 2 and the rear surface 2b or the EA material main body 2 The anchor piece 22 may protrude from the side surface.

  Although not shown, these EA materials 1C and 1D are also attached to the trim 5 via the projections 6 as shown in FIG. 1 (d). In the EA material 1 </ b> C, the rear surface 2 b of the EA material body 2 overlaps the trim 5. In the case of the EA material 1D, a slight gap is formed between the rear surface 2b and the trim, so that the unevenness of the trim can be absorbed.

  In the mounting plate 20 of FIG. 3, the anchor piece 22 as a whole is oblique to the mounting plate main body 21 at the same angle. However, even if the anchor piece is bent like the mounting plate 30 of FIG. Good.

  The mounting plate 30 includes a mounting plate main body 31 having an opening 33 on the distal end side, and an anchor piece 32 connected to the proximal end side of the mounting plate main body 31. The anchor piece 32 is connected to the base end side of the mounting plate main body 31, and the first piece 32 a obliquely intersecting the main body 31, the first piece 32 a is connected to the first piece 32 a, and extends in a direction substantially parallel to the main body 31. It is an open leg U-shape having two pieces 32b and a third piece 32c that is continuous with the second piece 32b and obliquely intersects with the second piece 32b. Thus, the anchor effect of the anchor piece 32 increases by making the anchor piece 32 into a bent shape. In this embodiment, two anchor pieces 32 are provided continuously with respect to the mounting plate main body 31, but only one item may be provided continuously, or three or more items may be provided continuously. Further, the anchor piece 32 may be provided with an opening.

  FIG. 5 (a) is a perspective view of a mounting plate 40 used for the EA material 1E according to the sixth embodiment, and FIG. 5 (b) is a perspective view of the EA material 1E according to the sixth embodiment. FIG. 5 (c) is a cross-sectional view taken along the line CC of FIG. 5 (b).

  The mounting plate 40 includes a mounting plate main body 41, an upright piece 42 erected from the mounting plate main body 41, and an anchor piece 43 extending from the upper end of the upright piece 42 in the direction opposite to the mounting plate main body 41. The side view shape is a crank shape, and the mounting plate main body 41 and the anchor piece 43 are provided with openings 44 and 45, respectively.

  In the EA material 1E, the trim side surface of the mounting plate main body 41 is flush with the rear surface 2b of the EA material main body 2, and the outer surface of the upright piece 42 (the surface on the mounting plate main body 41 side) is the EA material main body 2. The mounting plate 40 and the EA material main body 2 are integrated so that the anchor piece 43 is embedded in the EA material main body 2.

  This EA material 1E is also attached to the trim by the projection 6 as shown in FIG. 1 (d).

  In this embodiment, since the mounting plate main body 41 and the anchor piece 43 have the same shape, when the mounting plate 40 is assembled to the molding die for the EA material 1E, the direction is not reversed and the direction of the EA material 1E is reduced. The molding work efficiency is high.

  In the EA material 1E of FIG. 5 (b), the outer surface of the standing piece 42 is flush with the side surface of the EA material main body 2 and is exposed to the outer surface. The standing piece 42 may be embedded in the EA material main body 2 as shown in FIG. FIG. 6 (a) is a perspective view of the EA material 1F according to the seventh embodiment, and FIG. 6 (b) is a sectional view taken along line BB of FIG. 6 (a).

  In the mounting plate 40 of FIG. 5, the mounting plate main body 41 and the anchor piece 43 have a rectangular plate shape. However, this shape is not limited, and for example, a semicircular mounting like the mounting plate 40A of FIG. The plate body 41A and the semicircular anchor piece 43A may be used.

  Moreover, in this invention, you may provide the opening 46 in the standing piece 42 like the attachment plate 40B of FIG.7 (b). By providing this opening 46, the mounting strength of the mounting plate to the EA material body is improved.

  FIG. 8 (a) is a perspective view of an EA material 1G according to the eighth embodiment using the mounting plate 40A of FIG. 7 (a), and FIG. 8 (b) is B of FIG. 8 (a). FIG.

  In the EA material 1G, the standing piece 42 protrudes from the rear surface 2b of the EA material main body 2, and the mounting plate main body 41A is disposed on the trim side with respect to the rear surface 2b.

  The EA material 1G is attached to the trim as shown in FIG. In this case, a slight gap is formed between the EA material body 2 and the trim, and the unevenness of the trim can be absorbed.

  Each of the above embodiments is an example of the present invention, and the present invention can take forms other than those shown in the drawings.

FIG. 1 (a) is a perspective view of an EA material 1 according to the first embodiment of the present invention, and FIG. 1 (b) is a sectional view taken along the line BB of FIG. 1 (a). FIG. 1C is a perspective view of each mounting plate 3, and FIG. 1D is a cross-sectional view showing the mounting structure of the EA material 1. FIG. 2 (a) is a perspective view of a mounting plate used for the EA materials 1A and 1B according to the second and third embodiments, and FIG. 2 (b) is a BB line in FIG. 2 (a). 2C is a cross-sectional view of the EA material 1A, and FIG. 2D is a cross-sectional view of the EA material 1B. 3A is a perspective view of the mounting plate 20 used for the EA materials 1C and 1D according to the fourth and fifth embodiments, and FIGS. 3B and 3C are the EA materials 1C and 1D. FIG. It is a perspective view of the attachment plate used for the EA material which concerns on another embodiment. FIG. 5 (a) is a perspective view of a mounting plate used for the EA material according to the sixth embodiment, FIG. 5 (b) is a perspective view of the EA material 1E according to the sixth embodiment, and FIG. FIG. 5C is a cross-sectional view taken along the line CC of FIG. FIG. 6 (a) is a perspective view of the EA material 1F according to the seventh embodiment, and FIG. 6 (b) is a sectional view taken along line BB of FIG. 6 (a). It is a perspective view of the attachment plate used for the EA material which concerns on another embodiment. FIG. 8 (a) is a perspective view of an EA material 1G according to the eighth embodiment, and FIG. 8 (b) is a cross-sectional view taken along line BB of FIG. 8 (a). It is sectional drawing which shows a prior art example. It is explanatory drawing of the cap used for the prior art example. It is explanatory drawing of another prior art example.

Explanation of symbols

1, 1A to 1G EA material 2 EA material body 3, 10, 20, 30, 40, 40A, 40B Mounting plate 5 Trim 6 Protrusion 6a Flange-shaped presser

Claims (7)

An EA material to be attached to a member, the EA material having an EA material body made of a synthetic resin foam and a mounting plate protruding to the side of the EA material body, and the mounting plate being fixed to the member In
A plurality of small mounting plates are installed by burying the base end side of each mounting plate in the EA material main body and projecting the distal end side of the mounting plate to the side of the EA material main body. EA material.   2. The EA material according to claim 1, wherein two or more mounting plates are provided so as to protrude from the EA material main body in at least two directions.   3. The EA material according to claim 1, wherein the EA material body is made of urethane foam, and the mounting plate is made of resin, press felt, or iron.   The EA material according to claim 1, wherein the mounting plates have the same shape. 5. The front end side portion of the mounting plate that protrudes from the EA material main body is flush with a surface facing the member of the EA material main body, or more than that member. Apart from
An EA material characterized in that at least a part of a base end side portion embedded in the EA material main body of the mounting plate is further away from the facing surface than the tip end side portion. The attachment plate according to any one of claims 1 to 4, wherein the mounting plate is
The proximal end portion embedded in the EA material body;
A rising portion that is continuous with the base end portion and protrudes from the member facing surface of the EA material main body;
An EA material comprising: the leading end side portion extending to a side of the EA material main body and connected to the rising portion.   In the structure in which the EA material is attached to the member, the EA material is the EA material according to any one of claims 1 to 6, and the attachment plate is fixed to the attachment member protruding from the member. Characteristic EA material mounting structure.

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