JP2005048928A - Ea material, and its mounting clip and mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clip for mounting an EA material capable of simplifying a structure of a die for molding and reducing its manufacturing cost, and to provide the EA material and an EA material mounting structure using the clip. <P>SOLUTION: This clip 40 is constituted by fixing a sealing body 48 to an end face of a clip main body 41 having a through hole 42 with a stepped part 43. This clip 40 is buried in the EA material 1, and a flange part 45 is approximately flush with an outer face of the EA material 1. The EA material 1 is mounted on a trim and the like by inserting and locking a locking part 3' in the clip 40. <P>COPYRIGHT: (C)2005,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 an automobile trim. Moreover, this invention relates to the clip and EA material which are used for this attachment 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 the door trim, Japanese Patent Application Laid-Open No. 2001-322507 describes a structure shown in FIGS. FIG. 5 is a cross-sectional view showing the EA material mounting structure described in FIG. 7 of the publication, FIG. 6A is a perspective view of the cylindrical body 20 used in this structure, and FIG. 2 is a cross-sectional perspective view of the cylindrical body 20. FIG.

  The cylindrical body 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 cylindrical body 20 to the rod 26. Then, the claw portion 23 is engaged with the concave portion 27. 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 cylindrical body 20 is mounted on 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.

  In this EA material mounting structure, since the cylindrical body 20 and the EA material 33 are separate, when attaching the EA material to the trim 31, the work of applying the EA material to the trim 31 Then, two work steps, that is, the work of fitting the cylindrical body 20 to the rod 26 are required, and the work is troublesome.

  The structure shown in FIG. 4 is considered as an attachment structure of the EA material in which the workability of attaching the EA material to a member such as a trim is remarkably improved. 4A is a cross-sectional view of the EA material mounting structure in a substantially horizontal direction, FIG. 4B is a perspective view of a locking portion of the EA material mounting structure, and FIG. 4C is the EA material. It is a perspective view of the to-be-latched part of this attachment structure.

  An EA material 1 made of a synthetic resin such as rigid urethane foam is attached to a trim (for example, door trim) 2 as a member via a locking portion 3 and a locked portion 4 called a clip. The locked portion 4 is provided on the EA material 1, and the locking portion 3 is engaged with the locked portion 4.

  The locking portion 3 is composed of a pair of protrusions 8 and 8 erected from the trim 2. A claw portion 8a is provided on the side surface of the protrusion 8 in the protruding direction so as to protrude laterally. As the claw portion 8a approaches the substantially semi-cylindrical portion 8b constituting the proximal end side of the protrusion 8, the protruding height toward the side increases. Thereby, the protrusions 8 and 8 can be easily inserted into the opening 12 of the locked portion 4 described later.

  The protrusion 8 is formed of a synthetic resin having elasticity, and the protrusions 8 and 8 can be elastically deformed in the approaching direction.

  The locked portion (clip) 4 includes a cylindrical portion 6, an anchor 5 that protrudes outwardly from the rear end of the cylindrical portion 6, and a flange 7 that protrudes outwardly from the distal end of the cylindrical portion 6. Have The locked portion 4 is provided with a cylindrical opening 12 penetrating the flange 7, the cylindrical portion 6, and the anchor 5 in the axial center line direction. A step 13 is recessed in the direction.

  As shown in FIG. 4A, the locked portion 4 has a cylindrical portion 6 and an anchor 5 embedded in the EA material 1.

  The EA material 1 with the locked portion 4 is attached to the trim 2 by applying the projections 8 and 8 to the trim 2 while inserting them into the openings 12. When the EA material 1 is pressed against the trim 2, the protrusions 8 and 8 are pushed into the opening 12. When the claw portion 8a is pressed against the inner peripheral surface of the opening 12, the protrusions 8 and 8 are inserted into the opening 12 while being bent in the approaching direction. When the claw portion 8a reaches the step portion 13, the protrusions 8 and 8 try to return to the original shape elastically, and the claw portion 8a and the trim 2 sandwich the edge portion of the step portion 13. Further, the outer peripheral surfaces of the substantially semi-cylindrical portions 8 b and 8 b of the protrusions 8 and 8 come into contact with the inner peripheral surface of the opening 12 of the locked portion 4.

  As described above, the EA material 1 can be attached to the trim 2 only by one work process of superimposing the EA material 1 with the locked portion 4 on the trim 2, and the attachment work efficiency is remarkably improved. Further, the claw portions 8a, 8a of the projections 8, 8 and the trim 2 sandwich the edge of the step portion 13, and the outer peripheral surfaces of the substantially semi-cylindrical portions 8b, 8b are in contact with the inner peripheral surface of the opening 12. The EA material 1 is immovable in both the surface direction and the contact / separation direction of the trim 2, and the attachment of the EA material 1 becomes extremely firm.

As shown in FIG. 4A, in the locked portion 4, a part of the flange 7, the cylindrical portion 6 and the anchor 5 are embedded in the EA material 1. As described above, since the locked portion 4 does not penetrate the EA material 1 and the EA material 1 has a sufficient thickness in the vicinity of the locked portion 4, in the vicinity of the locked portion 4. The EA material 1 also has good shock absorption characteristics.
JP 2001-322507 A

  Since the step (13) of the clip (attached material) 4 is undercut, the structure of the mold for molding is complicated, the mold cost increases, and the molding work is troublesome.

  The present invention provides a clip for mounting an EA material, which can simplify the structure of a mold for molding, and has a low manufacturing cost, and provides an EA material and an EA material mounting structure using the clip. Objective.

  The clip for attaching an EA material of the present invention is a clip for attaching an EA material to a member, and is attached to a clip body having a through-hole penetrating from one end face to the other end face, and the other end face of the clip body. And a sealing body that seals the through hole, and a step portion having a large diameter on the other end surface side is provided on the inner peripheral surface of the through hole.

  Since the EA material attaching clip is manufactured by attaching a sealing body to the end face of the clip body having a through hole, the clip body itself can be formed so as not to have an undercut portion. . For this reason, the structure of the molding die for the clip body is simplified. In addition, the clip body can be efficiently manufactured by injection molding.

  By making the envelope into a sheet or thin plate, the manufacture of the envelope is facilitated and the attachment of the envelope to the clip body is facilitated.

  The sealing body may be formed separately from the clip body, or may be formed so as to be continuous through the hinge portion.

  If it is like the former, each manufacture is easy. If the latter is used, the attaching operation of the envelope becomes simple.

  By color-coding the envelope and the clip body, it is easy to visually check whether the envelope is attached to the clip body. In order to color-code, the color of the material may be different, or a sticker or tape of a different color may be attached to the envelope.

  The EA material of the present invention includes the EA material mounting clip of the present invention.

  This EA material with a clip can be easily attached to a trim or the like in the same manner as the structure of FIG. The EA material mounting structure of the present invention is such that the EA material of the present invention is attached to a member such as a trim, and an EA material locking projection protrudes from the member, and the projection is in the clip. It is inserted and engaged with the clip.

  According to the present invention, a clip for attaching an EA material can be manufactured at a low cost. Moreover, according to this invention, the EA material provided with this clip and the clip which attached this EA material to members, such as a trim, are provided.

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

  1A is a longitudinal sectional view of a clip for attaching an EA material according to an embodiment of the present invention, FIG. 1B is a partially enlarged sectional view of an EA material provided with the clip, and FIG. 2 is an exploded perspective view of the clip. FIG.

  The EA material attaching clip 40 includes a clip main body 41 and a sealing body 48 attached to one end face (the upper end face in FIG. 1) of the clip main body.

  The clip body 41 is made of an injection molded product of synthetic resin, and has a through hole 42 that penetrates from one end surface (lower end surface in the drawing) to the other end surface (upper end surface in the drawing). The through hole 42 is a square hole in this form, but may be a round hole or an elongated round hole. The through hole 42 has a large-diameter portion 42a and 42c at one end side and the other end side, and a small-diameter portion 42b between the two. A stepped portion 43 is formed between the small diameter portion 42b and the large diameter portion 42c.

  An outwardly hooked anchor 44 is provided on the other end side of the clip body 41. A flange portion 45 is provided on one end side. A portion adjacent to the flange portion 45 is a tapered portion 46.

  A sealing body 48 is attached to the end face of the clip body 41 on the anchor 44 side. The sealing body 48 closes the through hole 42 from the upper side in the figure.

  The sealing body 48 has a thin plate shape made of a synthetic resin and is formed separately from the clip body 41.

  In this embodiment, screw holes 44a and 48a are provided in the anchor 44 and the sealing body 48, and the sealing body 48 is fixed to the clip body 41 by hitting screws (not shown) through the screw holes 48a. ing. However, the sealing body 48 may be attached to the clip main body 41 by an adhesive or ultrasonic welding. The envelope 48 may be smaller than illustrated. The sealing body 48 may be formed of a sheet such as a synthetic resin film having a thickness that does not break.

  The EA material 40 is integrated with the EA material 1 so that most of the EA material 40 is embedded in the EA material 1 as shown in FIG.

  The EA material 1 is made of, for example, a synthetic resin foam such as urethane as in the case of FIG. The EA material 1 with the clip 40 is manufactured by attaching the clip 40 to the molding die during foam molding of the synthetic resin. Since the through hole 42 of the clip 40 is sealed by the sealing body 48 on the anchor 44 side, urethane does not enter the through hole 42.

  In this way, the EA material 1 is attached to the trim or the like so as to insert the locking portion 3 ′ protruding from the trim or the like into the clip 40 provided on the EA material 1. The structure of FIG. 1B is shown upside down from FIG. The locking portion 3 ′ may have the same structure as the locking portion 3 of FIG. 4 or may be different.

  The clip main body 41 of the clip 40 has a through hole 42 and does not have an undercut portion even though the step portion 43 is formed. For this reason, the clip main body 41 can be easily manufactured by injection molding using a mold having a simple structure.

  In order to make it easier to visually confirm that the sealing body 48 is attached to the clip main body 41, the sealing body 48 and the clip main body 41 are made of different colors, or a seal, tape or the like of a color different from that of the clip main body 41 is used. You may affix on the sealing body 48. FIG.

  FIG. 3 is a cross-sectional view of a clip 40A according to another embodiment.

  As shown in FIG. 3A, the clip 40 </ b> A is integrally formed so that the clip body 41 and the sealing body 48 are connected via a hinge portion 49. This hinge part 49 is comprised by the thin part of the synthetic resin, for example. A clip 40A is constructed by stacking the sealing body 48 on the anchor 44 as shown in FIG. 3 (b) so as to bend the hinge portion 49 and fixing the sealing body 48 to the sealing body 48 by screwing, adhesion, welding or the like. The The clip 40A can be easily aligned with the anchor 44 and the sealing body 48 at the time of manufacture.

  In FIG. 3A, the sealing body 48 projects to the side of the anchor 44, but it may project upward.

  Each of the above forms is an example of the present invention, and the present invention may take forms other than those illustrated.

It is sectional drawing of the clip concerning one form of the present invention. It is a disassembled perspective view of the clip of FIG. It is sectional drawing of the clip which concerns on another form. It is explanatory drawing of the conventional clip. It is sectional drawing which shows the attachment structure to the trim of EA material provided with the clip of FIG. It is explanatory drawing of another conventional clip.

Explanation of symbols

40, 40A clip 41 clip body 42 through hole 43 stepped portion 44 anchor 45 flange portion

Claims (12)

A clip for attaching an EA material to a member,
A clip body having a through-hole penetrating from one end surface to the other end surface;
And a sealing body that is attached to the other end surface of the clip body and seals the through hole, and a step portion having a larger diameter on the other end surface side is provided on the inner peripheral surface of the through hole. EA material mounting clip characterized by this.   2. The clip for attaching an EA material according to claim 1, wherein the clip body is made of an injection molded product of synthetic resin.   3. The clip for attaching an EA material according to claim 1, wherein the sealing body is a thin plate or a sheet.   The EA material mounting clip according to any one of claims 1 to 3, wherein the sealing body is formed separately from the clip main body.   The EA material mounting clip according to any one of claims 1 to 3, wherein the sealing body and the clip body are connected via a hinge portion.   The clip for attaching an EA material according to any one of claims 1 to 5, wherein the clip main body and the sealing body are color-coded.   An EA material comprising: an EA material main body made of a synthetic resin foam; and the EA material mounting clip according to any one of claims 1 to 6 integrated with the EA material main body. In the attachment structure of the EA material in which the EA material is attached to the member,
The EA material is the EA material according to claim 7,
The member is provided with a projection for locking the EA material,
An EA material mounting structure, wherein the protrusion is inserted into the clip and engages with the step portion of the clip.   9. The EA material mounting structure according to claim 8, wherein a claw portion is provided on a side surface of the protrusion in a protruding direction, and the claw portion is engaged with the stepped portion.   10. The EA material mounting structure according to claim 9, wherein a plurality of the protrusions are provided along a circumferential direction of the stepped portion.   11. The EA material mounting structure according to claim 9, wherein an edge portion of the stepped portion is sandwiched between the member and the claw portion.   12. The EA material mounting structure according to claim 8, wherein the member is an automobile trim.

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