WO1992008902A1 - Dispositif de fixation - Google Patents

Dispositif de fixation Download PDF

Info

Publication number
WO1992008902A1
WO1992008902A1 PCT/GB1991/001962 GB9101962W WO9208902A1 WO 1992008902 A1 WO1992008902 A1 WO 1992008902A1 GB 9101962 W GB9101962 W GB 9101962W WO 9208902 A1 WO9208902 A1 WO 9208902A1
Authority
WO
WIPO (PCT)
Prior art keywords
stem
serrations
skirt portion
free
face
Prior art date
Application number
PCT/GB1991/001962
Other languages
English (en)
Inventor
Peter James Richards
Original Assignee
Peter James Richards
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 Peter James Richards filed Critical Peter James Richards
Publication of WO1992008902A1 publication Critical patent/WO1992008902A1/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
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • F16B21/07—Releasable fastening devices with snap-action in which the socket has a resilient part
    • F16B21/073—Releasable fastening devices with snap-action in which the socket has a resilient part the socket having a resilient part on its inside

Definitions

  • This invention relates to fastening devices and has as its object the provision of a fastening device which is economical to produce, simple, and speedy to assemble.
  • a fastening device comprising interengageable male and female elements, the male element having a stem at least part of which is formed to provide serrations in a lengthwise series and defined by locking faces each constituting an abutment directed away from the operatively free end of the stem and camming faces each tapering in girth toward the free end; and the female element having a skirt portion with a free edge directed endwise to abut a face of an article to be operatively secured by the device and a stem gripping portion spaced within the skirt portion and linked to the latter by a resilient bridging formation, said gripping portion including a plurality of internal resilient limbs having free ends bounding a stem receiving aperture and directed away from said free edge of the skirt portion, whereby said free end of the stem may be engaged through said aperture with the free edge of the skirt portion directed away therefrom, the camming faces permitting the resilient limbs to spring along the serrations in a direction of engagement until the free edge of the skirt portion is urged into clamping
  • the stem will be circular in cross section throughout its length and the female element will be annular or toroidal in generally overall form.
  • the male element may include a head formation at the end remote from the free end of the stem, thus the two elements would be used in the manner of a nut and bolt but it will be appreciated that either element may take a variety of forms, e.g. the male element may take the form of a stud anchored to or integral with a component or other article or carrying other fastening or attachment means.
  • the male element could include a second matching or different stem portion for receiving a second female element to act in opposition to the first said element e.g. in the manner of a non-headed length of threaded studding with which nuts are engaged from its opposite ends.
  • both the male and female elements are mouldings of plastics material though it is also contemplated that one or other, or both, elements could be formed in other ways and/or of other materials such as metal.
  • Figure 1 is a part sectional view of a fastening device in securing condition
  • Figure 2 is a side elevation of a male element of said device
  • Figure 3 is a plan view of a female element of said device.
  • Figure 4 is a cross section on line 4-4 of Figure 3.
  • the fastening device comprises a bolt-like male element 10 having a head 12 at one end from which extends a coaxial stem 14; and a nut-like female element 16 engageable with said stem in securing condition as shown in Figure 1.
  • Stem 14 is, in this example, of circular section and of uniform overall diameter throughout its length and is formed, e.g. by moulding plastics material from which the whole of both elements are made to provide a series of serrations 18, in this example along its entire length.
  • Each serration 18 is defined by a locking face 20 on a respective diametral plane and directed towards head 12 and away from the free end 22 of the stem, and a part conical camming face tapering in diameter towards free end 22.
  • the female element 16 also a moulding of plastics material, is generally annular in form and includes a cylindrical skirt portion 26 having a free edge 28 constituting one end of the element.
  • the opposite end part of said portion merges with an annular bridging formation 30 which is of reduced thickness so that it is resilient and which, in the free or undeformed condition shown in Figure 4, tapers radially inwardly to merge with a central stem gripping portion 32 of element 16 which is spaced concentrically within skirt portion 26.
  • Gripping portion 32 comprises a plurality, in this example three, internal resilient limbs 34 disposed equi- angularly about the axis of the element and having their free ends 36 directed away from the plane of the free edge 28 of skirt portion 26, a central stem receiving aperture being defined therebetween.
  • the operation of the device is as follows. Assuming that it is wished to secure together a pair of articles, for example two plate or sheet metal components 38,40 ( Figure 1) in face-to-face relationship, the stem 14 of element 10 will be entered through aligned apertures in the components until head 12 abuts one face thereof, and the free end 22 of the stem will be entered into the aperture of female element 16, the latter having the free edge 28 of its skirt portion 26 directed toward the other face of the components.
  • Element 16 will be urged along the stem by axial pressure applied, at least at the final stages of tightening, to the central gripping portion 32 (a tubular tool sized to clear stem 14 may conveniently be provided for this purpose).
  • the camming faces 24 of the serrations 14 spring the limbs 34 apart so that the stem can be forced through the aperture.
  • the fastening device is rattle and vibration proof, the forces carried by limbs 34 are substantially in compression along their length, and securing is achieved very quickly and simply by rectilinear axial engagement of the two elements much more speedily than assembling and tightening screw threaded fastening elements.
  • the stem need not necessarily have serrations over its full length, it could be provided with a plain shank portion and be serrated only along a part which will be engaged by the female element in the secured condition e.g. to suit the fastening of articles of uniform known overall thickness or range of thicknesses.
  • the serrations could take various forms and need not necessarily be of uniform size and type along the stem. It is also within contemplation that the serrations could consist of successive turns of one or more helical screw thread type formations of the stem.
  • the stem be of circular section or generally cylindrical, thus serrations could be provided on the otherwise generally planar faces of a stem of square, triangular or other polygonal section.
  • a further advantage of the invention is that the stem of a male element, e.g. provided in the form of lengths of studding having serrations along its whole length, can readily be cut to any desired length prior to assembly and without hindering subsequent engagement of the female element thereon, in contrast to screw threaded studding where cutting usually distorts or damages the "start" of the thread making subsequent engagement of a nut thereon tiresomely difficult.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

Un dispositif de fixation comprend un élément mâle, à tête ou autre (10), dont la tige (14) est pourvue d'entailles (18) comportant une série de faces de verrouillage (20) orientées du côté opposé par rapport à son extrémité libre (22); et un élément femelle ((16) présentant une bordure annulaire externe d'un point de vue radial (26), dont l'extrémité libre (28) aboutit contre la face d'un article devant être fixé et qui est reliée par un élément élastique formant un pont (30), à une partie (32) destinée à agripper la tige, laquelle partie est pourvue de branches élastiques (34) dont les extrémités aboutissent contre les faces de verrouillage afin de présenter une résistance à l'enlèvement de la tige une fois que celle-ci s'est engagée dans ladite bordure aboutissant contre la face de l'article, et que l'élément formant un pont est lié pour produire une force de serrage.
PCT/GB1991/001962 1990-11-13 1991-11-07 Dispositif de fixation WO1992008902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9024615A GB2249804A (en) 1990-11-13 1990-11-13 Stud fastening device.
GB9024615.8 1990-11-13

Publications (1)

Publication Number Publication Date
WO1992008902A1 true WO1992008902A1 (fr) 1992-05-29

Family

ID=10685268

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001962 WO1992008902A1 (fr) 1990-11-13 1991-11-07 Dispositif de fixation

Country Status (3)

Country Link
AU (1) AU8863591A (fr)
GB (1) GB2249804A (fr)
WO (1) WO1992008902A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019145123A1 (fr) * 2018-01-29 2019-08-01 Fabian Nieberding Dispositif de fixation inamovible

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322452A (en) * 1992-05-29 1994-06-21 Itt Corporation Holddown system for connector
AU2170992A (en) * 1992-05-29 1993-12-30 Itt Industries, Inc. Holdown system for connector
US5465796A (en) * 1994-04-22 1995-11-14 Deere & Company Shank assembly with knock-on sweep
US5541377A (en) * 1994-08-05 1996-07-30 Mcgill Manufacturing Company, Inc. Panel mounted switch and method of assembling same
US5845911A (en) * 1996-05-22 1998-12-08 L&S Automotive Products Co. Replacement split boot assembly
US5775863A (en) * 1997-04-30 1998-07-07 Anderson; Jennifer Elisabeth Hand-operable self-locking fastener
US5980180A (en) * 1998-09-24 1999-11-09 Schiess; Jennifer E. Two-part fastener comprising a clip having a split collar engagable with a fastener post
JP2011231835A (ja) * 2010-04-27 2011-11-17 Sumitomo Wiring Syst Ltd 溝付棒状部材用のクランプ及びワイヤーハーネス用プロテクタ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH341761A (fr) * 1957-03-15 1959-10-15 Amora Ets Dispositif de scellage
DE1475035A1 (de) * 1965-12-01 1969-04-24 Hellermann Gmbh P Befestigungselementpaar
FR2084851A5 (fr) * 1970-03-19 1971-12-17 Itw Ltd
EP0152773A1 (fr) * 1984-02-01 1985-08-28 Mannesmann Kienzle GmbH Dispositif de fixation
GB2195390A (en) * 1986-09-26 1988-04-07 Taiwan Ind Fastener Corp Self-engaging securement foot

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0227209Y2 (fr) * 1986-09-02 1990-07-24
JPH0333149Y2 (fr) * 1987-08-31 1991-07-15
EP0450820A1 (fr) * 1990-04-05 1991-10-09 P.S.M. International Plc Elément de fixation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH341761A (fr) * 1957-03-15 1959-10-15 Amora Ets Dispositif de scellage
DE1475035A1 (de) * 1965-12-01 1969-04-24 Hellermann Gmbh P Befestigungselementpaar
FR2084851A5 (fr) * 1970-03-19 1971-12-17 Itw Ltd
EP0152773A1 (fr) * 1984-02-01 1985-08-28 Mannesmann Kienzle GmbH Dispositif de fixation
GB2195390A (en) * 1986-09-26 1988-04-07 Taiwan Ind Fastener Corp Self-engaging securement foot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019145123A1 (fr) * 2018-01-29 2019-08-01 Fabian Nieberding Dispositif de fixation inamovible

Also Published As

Publication number Publication date
AU8863591A (en) 1992-06-11
GB9024615D0 (en) 1991-01-02
GB2249804A (en) 1992-05-20

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