EP3867538A1 - Élément de fixation de type cheville auto-bloquant à nervure en spirale - Google Patents

Élément de fixation de type cheville auto-bloquant à nervure en spirale

Info

Publication number
EP3867538A1
EP3867538A1 EP18796381.4A EP18796381A EP3867538A1 EP 3867538 A1 EP3867538 A1 EP 3867538A1 EP 18796381 A EP18796381 A EP 18796381A EP 3867538 A1 EP3867538 A1 EP 3867538A1
Authority
EP
European Patent Office
Prior art keywords
dowel
type fastener
fastener according
spiral
fastener
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP18796381.4A
Other languages
German (de)
English (en)
Inventor
Domen MOZETIC
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3867538A1 publication Critical patent/EP3867538A1/fr
Withdrawn legal-status Critical Current

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
    • F16B15/00—Nails; Staples
    • F16B15/06—Nails; Staples with barbs, e.g. for metal parts; Drive screws
    • 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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/02—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose in one piece with protrusions or ridges on the shaft
    • 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
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/14—Bolts or the like for shooting into concrete constructions, metal walls or the like by means of detonation-operated nailing tools

Definitions

  • the invention relates generally to fasteners and more particularly, the present invention relates to the subject matter of dowel-type fasteners, having a unique configuration along its shank.
  • Joints with dowel-type fasteners are the most common fixings in a wide range of different structures, such as wood, interior, masonry and concrete constructions or industrial applications.
  • Dowel-type fasteners include bolts, screws, dowels, inserts, and nails. The main characteristic of this type of connections is a relatively good lateral load resistance. On the other hand, especially simple dowels have a generally inferior axial withdrawal strength, also referred as pulling out resistance of the dowel.
  • Nails are the least sophisticated and most easy-to-use dowel-type fastening means. They are quick and straight pushable into place, possibly by a simple percussive tool such as a hammer. Producing the least friction, plain nails are the easiest to install. However, as the holding power of such impact-drivable dowel-type fasteners is generally achieved by pressure and friction of displaced penetrated material bearing down on the shank of the fastener, smooth shank nails also have the least ability to be gripped by the penetrated material.
  • a screw creates a superior interlocking joint with the penetrated material, that has a greater holding power, but as torque driven, is more complex and demanding to install.
  • torque driven is more complex and demanding to install.
  • many particular types of nails for ordinary or special uses.
  • the shanks of some nails are ringed, threaded, spiraled, and/or barbed.
  • Patents disclosing information relevant to such fasteners include: US 1649049 A SPIRAL ROLLED PRODUCTS CO INC - Wood screw , US 2025961 A JAMES STONE HERMAN 19350806 - Wire nail, EP 0212068 A ROCKENFELLER KG 19870304 - Nail with a head at one end of the shaft and a point at the other, CA 2583890 A UNIVERSAL FASTENER OUTSOURCING 20071007 - Mushroom compaction and asymmetric-thread impact-drivable screw, US 2004047713 A JUNG YOUNG JAE 20040311 - Screwed nail, WO 2007081963 A STANLEY FASTENING SYS LP 20070719 - Nail with multiple shank deformations, US 5375957 A LYSAGHT AUSTRALIA LTD 19941227 - Impact drivable fastener, EP 0164432 B WAKAI & CO. LTD 19880203 - Twisted nail, and EP
  • Patents disclosing information relevant to combined steeply spiraled and barbed fasteners include: US 2269708 A ROBERT B DICKSON 19400122 - Fastening element, US 2011280686 A MAHDI MOHAMMED ISA 20111117 – Fastener, DE 2038885 A ROCKENFELLER KG 19720210 – lingnagel, US 2009155021 A ILLINOIS TOOL WORKS 20090618 - Deformed shank fastener, US 5741104 A ILLINOIS TOOL WORKS 19980421 - Steel fastener having grooved shank, US 3233498 HANDJA JOSEPH A 19660208 - Self-locking nail, DE 1978882U KIRCHHOFF SIEGFRIED 19680215 – Duebel, and US 2013017032 A ILLINOIS TOOL WORKS 20130117 - Spire insert with ring-shank nicking.
  • the double ended fasteners and inserts are generally used as anchoring means in many industrial applications, masonry, concrete and wood constructions, etc. Besides, as a particularly challenging aspect, there is in some cases a necessity to produce blind joints, so that the fastener itself is invisible after the joint has been formed. In high-quality furniture and other special constructions for example, the appearance of exposed mechanical fasteners such as nails, bolts, or screws is inappropriate. Although usual nails, bolts, and screws are generally exposed and visible, there are many prior art solutions of special inserts and double-ended impact-drivable dowel-type fasteners that can be concealed into a blind joint.
  • Patents disclosing information relevant to impact-drivable double-ended dowel-type fasteners include: DE 3309954 A FISCHER WALTER 19840920 - Joining element in particular for invisible joining of planar parts in furniture, US 1354549 A GILMER JOHN T 19201005 - Dowel pin, US 2002164228 A MARTIN DANNIE E 20021107 - Double ended fastener, EP 0150906 A OLLIS WILLIAM JOHN BERNARD 19850807 - Helical dowel, DE 19709574 A ELISCHER WERNER 19980910 - Nail fixture for esp. soft materials e.g.
  • wood or fibre blocks has two-ended, DE 10315319 A SPRICH KLAUS 20041014 – Doppelspitz, EP 0358223 A ASTL ARNO 19900314 - Connection element, especially a dowel, and US 4350464 A BROTHERS RICHARD 19820921 - Anchor bolt for concrete.
  • Push-in insert nuts are similar in concept and utilization to double-ended impact-drivable fasteners.
  • Patents disclosing information relevant to push-in insert nuts include: DE 1978882U KIRCHHOFF SIEGFRIED 19680215 - Duebel, GB 1549199 A BARNSDALE A D 19790801 – Insert, DE 4000782 A BOELLHOFF & CO 19910808 - Threaded insert, DE 19856611 A BOELLHOFF GMBH 20000615 - Metallic insert, and US 2013017032 A ILLINOIS TOOL WORKS 20130117 - Spire insert with ring-shank nicking.
  • the known impact-drivable double-ended fasteners and insert nuts are related to and limited by its prior art impact-drivable dowel-type fasteners' context. Therefore, to boost the solution to anchoring and blind joint production, an improved impact-drivable dowel-type fastener concept is needed.
  • the spirally ridged self-locking dowel-type fastener’s inventive concept takes a different approach from that taken by known fasteners and it is grounded upon different principles to the prior art. It originates from a broader understanding of the elastic-plastic interaction between an impact-drivable dowel-type fastener and a receiving member. It employs this understanding to provide a distinct fastener having an optimized shape to achieve a less resistant and non-destructive penetration, a considerably stronger fastening interaction, and a higher axial withdrawal strength over that of other known configurations.
  • the spirally ridged self-locking dowel-type fastener has a functionally formed lateral surface comprising a plurality of parallel spiral ridges defined by pairs of leading and trailing slopes.
  • the leading slopes are generally smooth surfaces, spanning between a channel bottom and a smooth spiral ridgeline, designed to slide the fastener into a penetrated receiving member.
  • the trailing slopes on the other hand, have a rough, barbed or toothed form designed to bite the receiving member into a locked position.
  • the claimed fastener’s shape efficiently harnesses the different forces, actions and reactions, taking part in its introduction into a receiving member.
  • An axial direction thrust as a primary external force applied to the fastener, propels it into the receiving member.
  • most of the fastener’s impact force exerts on its ridgelines and leading slopes.
  • the smooth leading slopes’ impact into the substrate transfers part of the axial direction thrust energy into a useful elastic deformation of the fastener and receiving member system.
  • the elastic deformation dilates the receiving material’s entering channels, thus releasing the trailing slopes and opening the way to the fastener’s insertion.
  • the fastener slides inside the receiving member.
  • the smooth leading surfaces and smooth spiral ridgelines minimize the slide’s friction and the penetrated material destruction.
  • a system’s elastic reaction prevails, returning the deformation toward its original shape and closing the entering channels.
  • the inward pushing motion causes minimal energy dissipation, so that most of its energy transforms in the twisting and gripping reaction of the fastener.
  • the result of the said introduction is the interlocking of the fastener with the receiving member in a deeper and rotated position.
  • the described introduction can be a single procedure or it can be easily repeated, until reaching the final fastening position.
  • the strong, non-destructive interaction creates a fastener’s superior withdrawal resistance and a high load capacity. Any additional shocks, vibrations or pulling out forces tend to engage the toothed trailing part of the fastener, increasing the bite into the penetrated material and reinforcing its fastening grip over a long run. As the axial pulling out force does not transfer into a torque needed to unlock the fastener from its locked position, a disengagement and fastener’s extraction is only possible by applying an intentional axial rotation to the fastener.
  • Figs. 1A - 1E are a side view (Fig. 1A) , a partial vertical cross section view (Fig. 1B) , a perspective section view (Fig. 1C) , a horizontal cross section view (Fig. 1D) and a partial side view (Fig. 1E) of an embodiment of a spirally ridged self-locking dowel-type fastener, embodying the principles of the present invention;
  • Figs. 2A - 2E are a side view (Fig. 2A) , a partial vertical cross section view (Fig. 2B) , a perspective section view (Fig. 2C) , a horizontal cross section view (Fig. 2D) and a partial side view (Fig. 2E) of an alternate embodiment of the spirally ridged self-locking dowel-type fastener;
  • Figs. 3A - 3D are a side view (Fig. 3A) , a vertical cross section view (Fig. 3B) , a perspective view (Fig. 3C) , and a horizontal cross section view (Fig. 3D) of still another alternate embodiment of the spirally ridged self-locking dowel-type fastener;
  • Figs. 4A - 4D are a side view (Fig. 4A) , a vertical cross section view (Fig. 4B) , a perspective section view (Fig. 4C) , and a horizontal cross section view (Fig. 4D) of another alternate embodiment of the spirally ridged self-locking dowel-type fastener; and
  • Figs. 5A - 5D are a side view (Fig. 5A) , a vertical cross section view (Fig. 5B) , a perspective section view (Fig. 5C) , and a horizontal cross section view (Fig. 5D) of yet another alternate embodiment of the spirally ridged self-locking dowel-type fastener.
  • Figs. 1A through 5D illustrate various embodiments of the claimed dowel-type fastener.
  • the dowel-type fastener has a monolithic body of metal or other relatively hard material that includes a shank 1 , having a functional lateral surface 5 therein.
  • the fastener installs by applying an external push, which transfers into an axial thrust of the fastener, propelling it into a receiving member 6 .
  • the functional lateral surface 5 reduces the penetration resistance and increases the pulling out resistance of the dowel-type fastener.
  • the fasteners are formed with a plurality of alternately disposed ridges 7 and channels 8 being spirally wrapped around a vertical axis 2 .
  • each of the ridges 7 forms a generally cutting sharp and smooth spiral ridgeline 12 , designed to cut a spirally channeled way into the penetrated material. Pairs of two side slopes, one being a downward leaning leading slope 10 , and the other being a trailing slope 13 , form the sides of the said ridges 7 .
  • Each of the said leading slopes 10 spanning between a lower channel bottom 11 and the spiral ridgeline 12 in a form of a smooth spiral surface, is designed to non-destructively engage the penetrated material, elastically dilating and opening the entering channels. As the fastener’s impact force overcomes the static friction between the leading slope 10 and the substrate, the fastener slides smoothly inside the receiving member 6 .
  • each of the said rough trailing slopes 13 is notched into a toothed form of a flight of spiral stairs, designed to bite the receiving member 6 into a locked position.
  • An upper tread 14 and a lower raiser 15 the two meeting at a tread’s front edge 16 , form each step of the said spiral stairs.
  • the said tread 14 is an upward facing interfering surface, designed to interlock a penetrated receiving member 6 , providing resistance against axial withdrawal.
  • the generally smooth raiser 15 extends approximately over the step’s vertical raise height 17 , and connects the next lower step’s tread 14 at a backside edge 18 .
  • the front edge 16 horizontally projecting over the underlying said raiser 15 and part of the next lower step’s said thread 14 , forms a sharp nosing 26 , designed to bite deeply into the penetrated material, and guarantee a larger said thread’s 14 interlocking surface.
  • the leading slope 10 and the raiser 15 of two adjacent said ridges are smoothly joined at a common channel bottom 11 , in a bow-like outline, to sustain the system’s elastic deformation.
  • the fastener’s channel depth 19 should not exceed 1/3 of its channel width 20 .
  • Figs. 1A - 1E illustrate a dowel-type fastener embodied in a form of a spiral nail 27 .
  • the spiral nail’s 27 lower leading portion 3 tapers downward in a form of a penetrating tip.
  • the upper trailing portion 4 forms a head 28 .
  • the constant ridgeline angle 9 of about 750 to the horizontal plane, and the constant steps’ vertical raise heights 17 along the entire said functional lateral surface’s 5 height make this fastener embodiment a universal spiral nail, capable of being installed by applying a single forceful axial direction thrust, as for example by a nailing gun, or by applying multiple repetitive axial direction thrusts or vibrations, as for example by a regular hammer, palm nailer, auto hammer, and the like.
  • Figs. 2A - 2E illustrate a dowel-type fastener embodied in a form of a double-ended dowel 29 , also capable of binding two receiving members into a blind joint.
  • the double-ended dowel’s 29 leading portion 3 is frustoconically tapered.
  • the said upper trailing portion 4 is an approximately mirrored form of the combined lower leading portion 3 and functional lateral surface 5 .
  • the two fastener’s ends are mirrored at a horizontal plane and share the same vertical axis 2 .
  • the constant ridgeline angle 9 of about 500 to the horizontal plane, and the constant steps’ vertical raise heights 17 along the whole said functional lateral surface’s 5 height, make this fastener capable of being installed by applying a single forceful axial direction thrust, or by applying multiple repetitive axial direction thrusts or vibrations, as for example by a percussive tool.
  • Figs. 3A - 3D illustrate a dowel-type fastener embodied in an alternative form of a double-ended dowel 29 , similar in form and function to the embodiment of figs. 2A - 2E .
  • this dowel screw or dowel bolt embodiment of the fastener is usable as an anchoring mean for joining dissimilar materials as well.
  • the said upper trailing portion 4 is a form of a different type of threaded dowel 30 , such as a screw, or a bolt, and the like, sharing the same vertical axis 2 .
  • the leading portion 3 and the trailing portion 4 include a shape adaptation 33 to engage a tool, capable of applying a torque to the fastener.
  • the leading portion’s 3 said shape adaptation 33 is a hexagonal socket, to be engaged by a hex key or the like.
  • the trailing portion’s 3 said shape adaptation 33 is a hex shaped collar, to be engaged by an open-ended spanner or the like.
  • the said shape adaptations 33 are useful for either the positioning or the extraction of the fastener.
  • Figs. 4A - 4D illustrate a dowel-type fastener embodied in a form of an insert nut 31 that includes a female axial opening 32 , sharing the same said vertical axis 2 .
  • the said female axial opening 32 includes a female thread therein, designed to mate a complementary male threaded dowel 35 .
  • the insert nut’s 31 leading portion 3 is frustoconically tapered in order to facilitate the insertion into a receiving member’s pre-drilled hole 34.
  • the insert nut 31 has a constant ridgeline angle 9 of about 600 to the horizontal plane, and equal steps’ vertical raise heights 17 along the entire said functional lateral surface’s 5 height.
  • the insert nut 31 can also bind two members into a blind joint.
  • the insert nut’s 31 upper trailing portion 4 can be either dematerialized or formed as a head 28, as represented by a dashed line.
  • the insert nut 31 embodiment having a dematerialized upper trailing portion 4 is especially appropriate for producing a blind joint.
  • Figs. 5A - 5D illustrate a dowel-type fastener embodied in an alternate form of a spiral nail 27 , particularly suitable for a single axial direction thrust installation method, as for example by a nailing gun, into a relatively softer elastic material, such as wood, plastics, etc.
  • the spiral nail’s 27 lower leading portion 3 tapers in a form of a penetrating tip.
  • the upper trailing portion 4 forms a head 28 .
  • the functional lateral surface 5 comprises a total number “n” of four equally disposed ridges 7 .
  • the said ridgeline angle 9 logarithmically increases from about 800 at the lowest point, to a ridgeline angle 9 of about 900 at the highest point of the said functional lateral surface 5 .
  • each ridge 7 should preferably not exceed 450 according to claim 8 .
  • the said raiser 15 is formed by two generally smooth surfaces, jointly connecting the said spiral ridgeline 12 to the adjacent channel bottom 11 .
  • the first riser’s surface 21 meets the said tread 14 at a said front edge 16
  • the second riser’s surface 22 meets the said tread at a side edge 23 .
  • Both, the said front edge 16 and the said side edge 23 are formed as sharp cutting edges, and are joined at a pointed thread’s side corner 24 to achieve an aggressive single bite of the fastener into the final fastened position.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

L'invention concerne un élément de fixation de type cheville. L'élément de fixation de type cheville auto-bloquant à nervure en spirale a une forme optimisée, pour obtenir une pénétration moins résistante et non destructive, une interaction de fixation considérablement plus forte, et une force de retrait axiale plus élevée. Sa surface latérale fonctionnelle (5) comprend une pluralité de nervures en spirale parallèles (7) délimitées par des paires de pentes d'attaque (10) et de pentes de fuite (13). Les pentes d'attaque (10) sont généralement des surfaces lisses, s'étendant entre un fond de canal (11) et une ligne de crête d'hélice lisse (12), conçues pour faire coulisser l'élément de fixation dans un élément de réception pénétré (6). Les pentes de fuite (13) ont une forme brute conçue pour mordre l'élément de réception (6) dans une position verrouillée.
EP18796381.4A 2018-10-21 2018-10-21 Élément de fixation de type cheville auto-bloquant à nervure en spirale Withdrawn EP3867538A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/078816 WO2020083458A1 (fr) 2018-10-21 2018-10-21 Élément de fixation de type cheville auto-bloquant à nervure en spirale

Publications (1)

Publication Number Publication Date
EP3867538A1 true EP3867538A1 (fr) 2021-08-25

Family

ID=64083062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18796381.4A Withdrawn EP3867538A1 (fr) 2018-10-21 2018-10-21 Élément de fixation de type cheville auto-bloquant à nervure en spirale

Country Status (2)

Country Link
EP (1) EP3867538A1 (fr)
WO (1) WO2020083458A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2021232748A1 (en) * 2021-08-25 2023-04-06 Illinois Tool Works Inc. Fastener Pin
USD986045S1 (en) 2021-08-31 2023-05-16 Primesource Building Products, Inc. Fastener
USD986728S1 (en) 2021-08-31 2023-05-23 Primesource Building Products, Inc. Fastener
RU208622U1 (ru) * 2021-09-10 2021-12-28 Владимир Григорьевич Дубинин Гвоздь

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