WO2009056715A2 - Dispositif de fixation d'une piece en matiere plastique sur une piece en tole, notamment d'un vehicule automobile - Google Patents

Dispositif de fixation d'une piece en matiere plastique sur une piece en tole, notamment d'un vehicule automobile Download PDF

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Publication number
WO2009056715A2
WO2009056715A2 PCT/FR2008/051748 FR2008051748W WO2009056715A2 WO 2009056715 A2 WO2009056715 A2 WO 2009056715A2 FR 2008051748 W FR2008051748 W FR 2008051748W WO 2009056715 A2 WO2009056715 A2 WO 2009056715A2
Authority
WO
WIPO (PCT)
Prior art keywords
hole
sheet metal
flange
metal part
plastic part
Prior art date
Application number
PCT/FR2008/051748
Other languages
English (en)
French (fr)
Other versions
WO2009056715A9 (fr
WO2009056715A3 (fr
Inventor
Sébastien DELION
Guillaume Deysson
Original Assignee
Renault S.A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault S.A.S. filed Critical Renault S.A.S.
Priority to EP08845090A priority Critical patent/EP2203652A2/de
Publication of WO2009056715A2 publication Critical patent/WO2009056715A2/fr
Publication of WO2009056715A3 publication Critical patent/WO2009056715A3/fr
Publication of WO2009056715A9 publication Critical patent/WO2009056715A9/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/041—Releasable devices
    • F16B37/043—Releasable devices with snap action

Definitions

  • the invention relates to a device for fixing a plastic part on a sheet metal part.
  • the invention is further directed to the application of such a fastening device to the fastening of plastic parts to sheet metal parts of a motor vehicle.
  • plastic fasteners are used which provide snap fastening with cost and labor advantages over conventional fasteners with screws and nuts.
  • the known fixing devices for fixing a plastic part on a sheet metal part comprise a hollow part made of deformable plastic material, in the form of a hollow tooth called by the "molar" specialists, adapted to engage and come into deformation engagement. of material in a hole made in the sheet metal part.
  • These devices comprise, on the other hand, a screw that can be engaged in a hole formed in the plastic part and screwed into the recess of the hollow tooth-shaped part.
  • Screwing the screw into the hollow portion engaged in the hole has the effect of widening the diameter of this part which promotes the anchoring of this part in the hole of the sheet metal part.
  • this tooth-shaped hollow portion does not mask the sheet metal sheet, which is detrimental to the aesthetics.
  • the object of the present invention is to provide a device for fixing a plastic part on a sheet metal part that overcomes the aforementioned drawbacks.
  • a device for attaching a plastic part to a sheet metal part comprising a hollow part of deformable material adapted to engage by deformation of the material in a hole made in the sheet metal part and a screw which can be engaged in a hole formed in the plastic part and screwed into said hollow part, the head of the screw being able to lean around the hole formed in the plastic part, characterized in that the hollow portion has a flange projecting radially around the side wall of this hollow portion, said side wall having a portion projecting axially from the flange in a direction opposite to the portion for engagement with the hole in the hollow portion; the sheet metal part.
  • the dimensions of the flange are greater than the dimensions of the hole formed in the plastic part, so that this flange masks the sheet metal part when the hollow portion is engaged in the hole of the sheet metal part and the workpiece plastic material is applied to this sheet metal part.
  • the dimensions of the hole formed in the plastic part are greater than those of the portion of the side wall of said hollow portion projecting from the flange so that this portion can engage in said hole.
  • This arrangement facilitates the positioning of the hole of the plastic part relative to that of the sheet metal part and the establishment of the screw.
  • the length of said portion of the side wall projecting from the flange is substantially equal to the thickness of said plastic part.
  • said collar is molded in one piece with the rest of said hollow portion.
  • said flange is of elastic material to form a seal with respect to the hole formed in the plastic part.
  • the hole made in the sheet metal part is rectangular
  • the hole formed in the plastic part is oblong, the diameter of the projecting portion of said hollow portion being substantially equal to the width of said hole; the flange of the hollow portion has an oblong shape, the length of this flange being, in service position, aligned with the length of the oblong hole of the plastic part.
  • FIG. 1 is an exploded perspective view showing the fastening device according to the invention, a sheet metal part and a plastic part
  • FIG. 2 shows the two parts applied to one another, the screw of the fastening device not being completely screwed
  • FIG. 3 is an enlarged perspective view of the hollow part of the fastening device according to FIG.
  • the invention is a sectional view showing the plastic part attached to the sheet metal part by means of the fixing device according to the invention.
  • the attached figures show a device for fixing a plastic part 1 on a sheet metal part 2, for example of a motor vehicle.
  • the fixing device comprises a hollow part 3 made of tooth-shaped deformable plastic adapted to engage by deformation of the material in a hole 4 (see FIGS. 1 and 4) made in the sheet metal part 2 and a screw 5 which can be engaged in a hole 6 formed (see Figures 2 and 4) in the plastic part 1 and screwed into the hollow portion 3.
  • the head 7 of the screw 5 can after tightening (see FIG. 4) around the hole 6 formed in the plastic part 1.
  • the hollow portion 3 comprises a flange 8 projecting radially around the side wall of this hollow portion 3.
  • the side wall of the hollow portion 3 comprises (see FIG. 3) a portion 9 protruding axially with respect to the flange 8 in a direction opposite to the portion 3 intended to engage in the hole 4 made in the sheet metal part 2 .
  • the dimensions of the flange 8 are greater than the dimensions of the hole 6 formed in the plastic part 1, so that this flange 8 masks (see Figure 2) the sheet metal part 2 when the hollow portion 3 is engaged in the hole 4 of the sheet metal part 2 and the plastic part 1 is applied to this sheet metal part 2.
  • the dimensions of the hole 6 formed in the plastic part are greater than those of the part 9 of the side wall of the hollow portion 3 projecting from the collar 8 so that this part 9 can engage in the hole 6, as shown in Figure 2.
  • the length of the portion 9 of the side wall projecting from the flange 8 is substantially equal to the thickness of the plastic part 1.
  • the edge of the portion 9 is substantially at the same level than the outer surface of the room 1.
  • the flange 8 is molded in one piece with the remainder of the hollow portion 3.
  • the flange 8 is made of elastic material, for example rubber, to form a seal with respect to the hole 6 formed in the plastic part 1.
  • Figure 1 shows that hole 4 made in the sheet metal part 2 is rectangular.
  • the hole 6 formed in the plastic part 1 is of oblong shape and the diameter of the protruding portion 9 of the hollow portion 3 is substantially equal to the width of the hole 6.
  • FIG. 3 shows that the flange 8 of the hollow portion 3 has an oblong shape, the length of this flange 8 being, in the operating position, aligned with the length of the oblong hole 6 of the plastic part 1.
  • the procedure is as follows: first, the hollow part 3 is pressed in the hole 4 of the sheet metal part 2: this operation is facilitated by the tapered shape of the hollow portion 3 and the deformability of the material constituting the latter, the hole 6 of the plastic part 1 is then engaged on the projecting part 9 of the hollow part 3: this operation makes it possible to obtain very precise positioning of the workpiece 1 with respect to the workpiece 2, after this operation, there remains a play on either side of the projecting portion 9 which allows the workpieces 1 and 2 to expand relative to each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
PCT/FR2008/051748 2007-10-31 2008-09-30 Dispositif de fixation d'une piece en matiere plastique sur une piece en tole, notamment d'un vehicule automobile WO2009056715A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08845090A EP2203652A2 (de) 2007-10-31 2008-09-30 Vorrichtung zur anbringung eines kunststoffteils an einem bahnenmaterialteil, insbesondere für ein motorfahrzeug

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0707662 2007-10-31
FR0707662A FR2922973A1 (fr) 2007-10-31 2007-10-31 Dispositif de fixation d'une piece en matiere plastique sur une piece en tole, notamment d'un vehicule automobile.

Publications (3)

Publication Number Publication Date
WO2009056715A2 true WO2009056715A2 (fr) 2009-05-07
WO2009056715A3 WO2009056715A3 (fr) 2009-07-30
WO2009056715A9 WO2009056715A9 (fr) 2010-05-06

Family

ID=39495276

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2008/051748 WO2009056715A2 (fr) 2007-10-31 2008-09-30 Dispositif de fixation d'une piece en matiere plastique sur une piece en tole, notamment d'un vehicule automobile

Country Status (3)

Country Link
EP (1) EP2203652A2 (de)
FR (1) FR2922973A1 (de)
WO (1) WO2009056715A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106184395A (zh) * 2016-07-29 2016-12-07 奇瑞新能源汽车技术有限公司 电动汽车a柱下结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4906152A (en) * 1987-06-30 1990-03-06 Nifco, Inc. Screw retainer
US20010003570A1 (en) * 1999-12-08 2001-06-14 Hiromichi Mizuno Grommet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4906152A (en) * 1987-06-30 1990-03-06 Nifco, Inc. Screw retainer
US20010003570A1 (en) * 1999-12-08 2001-06-14 Hiromichi Mizuno Grommet

Also Published As

Publication number Publication date
WO2009056715A9 (fr) 2010-05-06
WO2009056715A3 (fr) 2009-07-30
FR2922973A1 (fr) 2009-05-01
EP2203652A2 (de) 2010-07-07

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