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DE2555322A1 - Wood screw with smooth upper shank - has threads stripped for clearance fit through first panel - Google Patents

Wood screw with smooth upper shank - has threads stripped for clearance fit through first panel

Info

Publication number
DE2555322A1
DE2555322A1 DE19752555322 DE2555322A DE2555322A1 DE 2555322 A1 DE2555322 A1 DE 2555322A1 DE 19752555322 DE19752555322 DE 19752555322 DE 2555322 A DE2555322 A DE 2555322A DE 2555322 A1 DE2555322 A1 DE 2555322A1
Authority
DE
Germany
Prior art keywords
screw
head
thread
wood
connecting screw
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.)
Pending
Application number
DE19752555322
Other languages
German (de)
Inventor
Geb Graebner Renate Haubold
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
Priority to DE19752555322 priority Critical patent/DE2555322A1/en
Publication of DE2555322A1 publication Critical patent/DE2555322A1/en
Pending 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • F16B25/0063—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections with a non-threaded portion on the shaft of the screw

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Connection Of Plates (AREA)

Abstract

The wood screw has a clearance-fit shank section nearest its head, and a threaded tip section. The clearance-fit shank has the same diameter as the threaded section root diameter. The screw obviates the necessity of prior drilling of one of the pieces of wood to be connected. The screw may have a flat, round or countersunk head, and the smooth shank may have an arbitrary lateral tolerance fit in the first piece of wood it enters, so that the connection is purely a tension fastening. The unthreaded shank length is chosen to correspond to the thickness of the first piece.

Description

Verfahren und Verbindungsmittel zum Verbinden Method and connecting means for connecting

zweier Teile, insbesondere Holzteile, miteinander hs sind die unterschiedlichsten Verfahren zum Verbinden fester Werkstoffe, insbesondere aus Holz und Kunststoff, wie: Zapfen, Kleben, Schrauben, Nieten, Heften, Klammern bekannt. In der Regel sind aufwendige Hilfsarbeiten als Vorbereitungsarbeiten für das feste Aneinanderbringen der Teile erforderlich. two parts, especially wooden parts, with each other hs are very different Process for joining solid materials, especially wood and plastic, known as: tenons, glues, screws, rivets, staples, staples. Usually are Elaborate auxiliary work as preparatory work for the permanent attachment of the parts required.

Bei Schraubverbindungen, insbesondere mit Holzschrauben, war bisher eine feste Pressung zweier Holzwerkstoff und oder auch Kunststoffteile nur möglich, in dem ein Teil vorgebohrt wurde. Durch beim Durchschrauben ohne Vorbohrung entstehende Gewindepassung in beiden zu verbindenden Teilen war es bisher nicht möglich absolut feste, dichte Preßpassungen zwischen zwei oder mehreren Teilen zu erreichen.With screw connections, especially with wood screws, was previously a firm pressing of two wood-based materials and / or plastic parts is only possible, in which a part has been pre-drilled. By screwing through without pre-drilling Thread fit in both parts to be connected was previously not absolutely possible to achieve firm, tight interference fits between two or more parts.

Nach dem neuen Verfahren(Sig. 1) erhalt die Holzschraube ( 3 und Fig.3) in der Dicke des einen zu verbindenden Holzwerkstoff -und oder auch Kunststoffteils (1) einen kewindefreien Schaft (2), der bei einem Zug- Schraubvorgang mittels des Gewindes (4) mit dem anzuziehenden Teil (5) einen absoluten Preßsitz des Teiles (1) mit dem Teil (5) durch freies Gleiten nach dem Durchschnitt im Teil (1) gewährleistet.According to the new method (Sig. 1) the wood screw (3 and Fig. 3) in the thickness of the wood-based material or plastic part to be connected (1) a thread-free shank (2) which, during a tension-screwing process, is carried out by means of the Thread (4) with the part to be tightened (5) an absolute interference fit of the part (1) with part (5) guaranteed by free sliding after the intersection in part (1).

Durch das Materialsverdrängungsprinzip tritt ein zusätzlicher Preßvorgang des zurückfedernden Materials, insbedondere Holzes, am gewindefreien Schaft auf. Das neue Verbindungsverfahren gewährleistet damit auch bei Verwendung von Schrauben mit Flach-oder Rundkopf (Fig.4 und Fig.5) und freiem Schaft (in.2) eine nicht seitlich verschiebbare Preßpassung, zusätzlich zum Preßeffekt des zu verbindenden Teiles (1) mit dem Teil (5) oder zusätzlicher Teile (6). Die Schaftlängen als Gleitflächen entsprechen dabei der zu durchstoßenden Dicke der beispielsweise anzupreßenden Teile (1) und (6) mit dem Teil (5).An additional pressing process occurs due to the material displacement principle of the spring-back material, in particular wood, on the thread-free shaft. The new connection method ensures that screws are also used with flat or round head (Fig.4 and Fig.5) and free shaft (in.2) one not on the side Slidable interference fit, in addition to the pressure effect of the part to be connected (1) with part (5) or additional parts (6). The shaft lengths as sliding surfaces correspond to the thickness to be pierced, for example to be pressed Parts (1) and (6) with part (5).

Mit dem neuen Verfahren ist es jetzt möglich leicht zu durchstossende Stoffe, wie Holz, Kunststoff und oder auch Verbundwerstoffe aus Holz, Kunststoff, sowie mineralische Verbundstoffe im Zug- Freischnittverfahren fest, also im Preßsitz ohne aufwendige Vorbohrungsarbeiten im anzuspannenden Teil beispielsweise (Fig.1, Teil 1 zum Teil 5) untereinander zu verbinden, wobei sich erhebliche wirtschafrliche Vorteile mit dem neuen Verbindungsverfahren ergeben. Nach dem neuen Verfahren ist es erstmals möglich ohne aufwendige arbeiten und Vorrichtungen bei beispielsweise automatische Schraubenzuführung im Durchstoßschrautverfahren Teile wie beispielsweise Rahmen, Aufdoppelungen, allgem.With the new process it is now possible to pierce easily Materials such as wood, plastic and / or composite materials made of wood, plastic, as well as mineral composites in the tensile free cut process, i.e. in a press fit without laborious pre-drilling work in the part to be clamped, for example (Fig. 1, Part 1 to Part 5) to connect with each other, whereby considerable economic Advantages with the new connection method result. According to the new procedure is it is possible for the first time without laborious work and devices at, for example automatic screw feed in the push-through screwing process parts such as Frames, doublings, general

Verbundtelle fest, im absoluten Preßsitz zu verbinden.Connection point firmly to connect in an absolute press fit.

L e e i s e i t eL e i t e i t e

Claims (7)

Patentansprüche: 1. Verfahren und Verbindungsmittel insbesondere Holzschraube dadurch gekennzeichnet, daß die Verbindangsschraube (3) einen gewindefreien Schaft als leitfläche (2) für den Preßsitz im Durchstoßpreßverfahren aufweist und ein nachfolgendes Gewinde für das Verspannen der Teile untereinander als Zug-Freischnittelemant besitzt.Claims: 1. Method and connecting means, in particular wood screw characterized in that the connecting screw (3) has a thread-free shaft has as a guide surface (2) for the press fit in the push-through process and a subsequent one Has threads for bracing the parts with one another as a tension-free cut element. 2. Verbindsschraube nach Anspruch 1 dadurch gekennzeichnet, daß der gewindefreie Gleitschaft (2) dem Kerndurchmesser des Gewindes (4) entspricht.2. Connecting screw according to claim 1, characterized in that the thread-free sliding shaft (2) corresponds to the core diameter of the thread (4). 3. Verbindungsschraube nach Anspruch 1 und 2 dadurch gekennzeichnet, daß der Gleit- Schaftdurchmesser (2)gegenüber dem Kerndurchmesser des Gewindes (4) verjüngt ist.3. Connecting screw according to claim 1 and 2, characterized in that that the sliding shaft diameter (2) compared to the core diameter of the thread (4) is rejuvenated. 4. Verbindungsschraube nach Anspruch 1,2 und 3 dadurch gekennzeichnet, daß der gewindefreie Schaft (2) jeweils die Länge der Dicke des dem Schraubenkopf zugeordneten, anzuspannenden Teiles oder Teile entspricht.4. Connecting screw according to claim 1, 2 and 3, characterized in that that the thread-free shaft (2) is the length of the thickness of the screw head associated part or parts to be clamped. 5. Verbindungsschraube nach Anspruch 1,2,3,4 dadurch gekennzeichnet, daß der gewindefreie Schaft länger ist als die Dicke des zu spannenden teiles.5. Connecting screw according to claim 1, 2, 3, 4, characterized in that that the thread-free shaft is longer than the thickness of the part to be clamped. 6. Verbindungsschraube nach Anspruch 1,2,3,4 und 5 dadurch gekennzeichnet, daß der Schraubenkopf als Senkkopf, Linsenkopf, Rundkopf, Zylinderkopf mit oder ohne Innensechskant, Sechskantschraube ausgebildet ist. 6. Connecting screw according to claim 1, 2, 3, 4 and 5, characterized in that that the screw head as a countersunk head, pan head, round head, cylinder head with or is designed without hexagon socket, hexagon screw. 7. Verbindungsschraube nach Anspruch 1,2,3,4,5 und 6 dadurch gekennzeichnet, daß die Kopfschraube mit Längs-, Kreuz- oder Sternschlitz ausgerüstet ist. 7. Connecting screw according to claim 1, 2, 3, 4, 5 and 6, characterized in that that the head screw is equipped with a straight, cross or star slot.
DE19752555322 1975-12-09 1975-12-09 Wood screw with smooth upper shank - has threads stripped for clearance fit through first panel Pending DE2555322A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752555322 DE2555322A1 (en) 1975-12-09 1975-12-09 Wood screw with smooth upper shank - has threads stripped for clearance fit through first panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752555322 DE2555322A1 (en) 1975-12-09 1975-12-09 Wood screw with smooth upper shank - has threads stripped for clearance fit through first panel

Publications (1)

Publication Number Publication Date
DE2555322A1 true DE2555322A1 (en) 1977-06-23

Family

ID=5963897

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752555322 Pending DE2555322A1 (en) 1975-12-09 1975-12-09 Wood screw with smooth upper shank - has threads stripped for clearance fit through first panel

Country Status (1)

Country Link
DE (1) DE2555322A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003031831A1 (en) * 2001-10-09 2003-04-17 Sedie Friuli Di Fornasarig Srl Self-threading attachment screw
EP1371862A1 (en) * 2002-06-13 2003-12-17 Illinois Tool Works Inc. Self-drilling fastener
DE102007024224A1 (en) * 2007-05-11 2008-11-20 Adolf Würth GmbH & Co. KG Self-drilling screw
WO2014121913A1 (en) * 2013-02-08 2014-08-14 Fischerwerke Gmbh & Co. Kg Method for increasing the strength of a rod-like fastening element made of metal, rod-like fastening element and screw

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003031831A1 (en) * 2001-10-09 2003-04-17 Sedie Friuli Di Fornasarig Srl Self-threading attachment screw
EP1371862A1 (en) * 2002-06-13 2003-12-17 Illinois Tool Works Inc. Self-drilling fastener
US6923611B2 (en) 2002-06-13 2005-08-02 Illinois Tool Works Inc. Self-drilling fastener
DE102007024224A1 (en) * 2007-05-11 2008-11-20 Adolf Würth GmbH & Co. KG Self-drilling screw
WO2014121913A1 (en) * 2013-02-08 2014-08-14 Fischerwerke Gmbh & Co. Kg Method for increasing the strength of a rod-like fastening element made of metal, rod-like fastening element and screw
CN104955590A (en) * 2013-02-08 2015-09-30 费希尔厂有限责任两合公司 Method for increasing the strength of a rod-like fastening element made of metal, rod-like fastening element and screw

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