DE2912924A1 - Screw inserted in porous concrete - has set of grooves between thread lands of curved cross=section - Google Patents

Screw inserted in porous concrete - has set of grooves between thread lands of curved cross=section

Info

Publication number
DE2912924A1
DE2912924A1 DE19792912924 DE2912924A DE2912924A1 DE 2912924 A1 DE2912924 A1 DE 2912924A1 DE 19792912924 DE19792912924 DE 19792912924 DE 2912924 A DE2912924 A DE 2912924A DE 2912924 A1 DE2912924 A1 DE 2912924A1
Authority
DE
Germany
Prior art keywords
screw
lands
distance
grooves
thread
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Withdrawn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
DE19792912924
Other languages
German (de)
Inventor
Reinhard Schnitzmeier
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.)
ERNST BIERBACH KG
Original Assignee
ERNST BIERBACH KG
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 ERNST BIERBACH KG filed Critical ERNST BIERBACH KG
Priority to DE19792912924 priority Critical patent/DE2912924A1/en
Publication of DE2912924A1 publication Critical patent/DE2912924A1/en
Withdrawn legal-status Critical Current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
    • 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
    • F16B25/0026—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 hard non-organic material, e.g. stone, concrete or drywall
    • 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
    • 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
    • F16B25/0047—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 ridge being characterised by its cross-section in the plane of the shaft axis

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Dowels (AREA)

Abstract

The screw is designed for use in porous concrete or lightweight bricks. It has a threaded portion which merges into a smooth shank onto which a head joins. The grooves between the thread lands are of curved cross-section, and the curve radius can be greater than the distance between the lands, measured in the axial direction, and typically between 5 and 7 mm, while the distance between lands can be between 4 and 5 mm, typically 4.5mm., where the thread core dia. is 3mm. The thread lands are sharp.

Description

Porenbeton-SchraubeAerated concrete screw

Die Erfindung betrifft eine Schraube für die Verwendung in Porenbeton oder anderen, porösen Leichtbausteinen sowie Baumaterialien mit Blähton als Zuschlagstoff.The invention relates to a screw for use in aerated concrete or other, porous lightweight building blocks as well as building materials with expanded clay as aggregate.

Poröse Baumaterialien wie Porenbeton setzen sich bei der Herstellung von Gebäuden in zunehmendem Maße durch, da durch das geringe Gewicht nicht nur eine leichte Handhabbarkeit und Transportierbarkeit gegeben ist1 sondern insbesondere eine erhöhte Wärmedämmung und damit Energieeinsparung erreicht wird.Porous building materials like aerated concrete settle in the manufacturing process of buildings to an increasing extent because of the low weight not just one easy handling and transportability is given1 but in particular increased thermal insulation and thus energy savings are achieved.

Nachteilig ist bei diesen bekannten porösen Werk stoffen aber, daß normale Schrauben mit nur gering profilierten Schraubengängen nur sehr geringe Auszugswerte besitzen, andere Baumaterialien oder Möbelstücke also nicht mit genügend großer Sicherheit befestigt werden können.The disadvantage of these known porous work materials is that normal screws with only slightly profiled screw threads only very low extraction values own other building materials or pieces of furniture that are not large enough Security can be attached.

Es ist Aufgabe der Erfindung, eine Schraube zu schaffen, welche die vorgenannten Nachteile nicht mehr aufweist und die leicht herstellbar sein soll, sich gut in das poröse Material einschrauben lassen soll und dort mit hoher Festigkeit verankert ist.It is the object of the invention to provide a screw which the no longer has the aforementioned disadvantages and which should be easy to manufacture, should be easy to screw into the porous material and there with high strength is anchored.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Gewindegänge der Schraube zwischen den Graten kreisförmig eingezogen sind, wobei vorteilhaft der Durchmesser der Einzugskurve eine GröRe aufweist, die zwischen 4 und 6 mm liegt und über dem Abstand der Grate, gemessen entlang einer Mantellinie der Schraube liegt.This object is achieved according to the invention in that the threads the screw are drawn in circularly between the ridges, which is advantageous the diameter of the indentation curve is between 4 and 6 mm and over the distance between the ridges, measured along a surface line of the screw lies.

Als besonders günstig hat sich ein Abstand der Grate von 4,5 mm bei einem Kerndurchmesser von 2,8 mm und einem Schrauben-Außendurchmesser von 5,2 mm erwiesen.A distance between the ridges of 4.5 mm has proven to be particularly favorable a core diameter of 2.8 mm and an outer screw diameter of 5.2 mm proven.

Die Zeichnung zeigt eine erfindungsgemäße Schraube, die mit einem linsenförmigen, einfach geschlitzten Kopf dargestellt ist und zwischen dem Kopf und dem Gewindeteil einen glatten Schaft aufweist. Für den Fachmann selbstverständlich können auch andere Kopfformen verwendet werden, statt eines einfachen Schlitzes kann ein Kreuzschlitz vorhanden sein und das Gewinde kann sich bis zu dem Kopf fortsetzen.The drawing shows a screw according to the invention with a Lenticular, single slotted head is shown and between the head and the threaded part has a smooth shaft. For the expert, of course Other head shapes can be used instead of a simple slot There may be a cross recess and the thread may continue to the head.

Erfindungswesentlich ist die starke Einschnürung zwischen den Graten der Gewindegänge, die kreisförmig ist und für den Fachmann überraschend nicht nur eine gute Einschraubbarkeit der Schraube auch ohne ein Vorbohren ergibt, sondern insbesondere zu einer sehr guten Auszugsfestigkeit führt.The strong constriction between the ridges is essential to the invention the thread turns, which is circular and surprising not only for the skilled person a good screwability of the screw even without a Pre-drilling results, but in particular leads to a very good pull-out strength.

Der Durchmesser der die Einzugskurven bildenden r4se liegt zwischen 4 und 6 mm und der Gratabstand gemessen entlang einer Schrauben-Mantellinie beträgt zwischen 4 und 5, vorzugsweise 4,5 mm bei einem Kerndurchmesser gemessen am Grund der Einzugsnuten von 2,8 mm und einem Spitzendurchmesser gemessen an den Gratspitzen von 5,2 mm. Diese Maße ergeben für die erfindungsgemäßen Schrauben das optimale Verhältnis von Auszugsfestigkeit und leichter Einschraubbarkeit. Geringfügige Abweichungen sind möglich, ohne daß das Wesen der Erfindung verändert wird. Die vorliegenden Maße sind daher erläuternd und nicht einschränkend zu verstehen.The diameter of the r4se forming the draw-in curves is between 4 and 6 mm and the distance between the burrs measured along a screw surface line is between 4 and 5, preferably 4.5 mm, with a core diameter measured at the base the draw-in grooves of 2.8 mm and a tip diameter measured at the tips of the burrs of 5.2 mm. These dimensions result in the optimum for the screws according to the invention Relationship between pull-out strength and ease of screwing. Minor deviations are possible without changing the essence of the invention. The present Dimensions are therefore to be understood as explanatory and not restrictive.

LeerseiteBlank page

Claims (5)

Patentansprüche: ( 3,; Schraube für die Verwendung in Porenbeton oder Leichtbausteinen, mit einem Gewindeteil, der in einen glatten Schaftteil übergeht und einem daran anschließenden Kopf, dadurch gekennzeichnet, daß die Gewindegänge zwischen den Graten kreisförmig eingezogen sind Claims: (3 ,; screw for use in aerated concrete or lightweight building blocks, with a threaded part that merges into a smooth shaft part and an adjoining head, characterized in that the threads are drawn in in a circle between the ridges 2. Schraube nach Anspruch 1, gekennzeichnet durch einen Durchmesser der Einzugskurven zwischen den Graten, dessen Größe den Abstand der Grate gemessen entlang einer Mantellinie der Schraube übersteigt.2. Screw according to claim 1, characterized by a diameter of the indentation curves between the ridges, the size of which is the Distance of the burrs measured along a surface line of the screw exceeds. 3. Schraube nach Anspruch 2, dadurch gekennzeichnet, daß der Kurvendurchmesser zwischen 5 und 7 mm be trägt. 3. Screw according to claim 2, characterized in that the curve diameter between 5 and 7 mm be. 4. Schraube nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Abstand von Grat zu Grat, gemessen entlang einer Mantellinie der Schraube, bei einem Kerndurcha messer von 3 mm zwischen 4 und 5 mm beträgt. 4. Screw according to claim 1 to 3, characterized in that the Distance from ridge to ridge, measured along a surface line of the screw, for one Core diameter of 3 mm is between 4 and 5 mm. 5. Schraube nach Anspruch 4, dadurch gekennzeichnet, daß der Abstand 4,5 mm beträgt. 5. Screw according to claim 4, characterized in that the distance 4.5 mm.
DE19792912924 1979-03-31 1979-03-31 Screw inserted in porous concrete - has set of grooves between thread lands of curved cross=section Withdrawn DE2912924A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792912924 DE2912924A1 (en) 1979-03-31 1979-03-31 Screw inserted in porous concrete - has set of grooves between thread lands of curved cross=section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792912924 DE2912924A1 (en) 1979-03-31 1979-03-31 Screw inserted in porous concrete - has set of grooves between thread lands of curved cross=section

Publications (1)

Publication Number Publication Date
DE2912924A1 true DE2912924A1 (en) 1980-10-16

Family

ID=6067047

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792912924 Withdrawn DE2912924A1 (en) 1979-03-31 1979-03-31 Screw inserted in porous concrete - has set of grooves between thread lands of curved cross=section

Country Status (1)

Country Link
DE (1) DE2912924A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088366A1 (en) * 1982-03-05 1983-09-14 RICHARD BERGNER GMBH & CO Self-tapping screw
US4842467A (en) * 1984-08-24 1989-06-27 Yamashina Seiko-Sho, Ltd. Concrete screw
AT389923B (en) * 1988-01-29 1990-02-26 Sfs Stadler Ag SELF-DRILLING AND THREADING SCREW FOR TURNING INTO GAS-CONCRETE
EP2160518A1 (en) * 2007-06-20 2010-03-10 Unisteel Technology International Limited Thread forming screw thread and corresponding thread roll die
WO2010093329A1 (en) * 2009-02-16 2010-08-19 Unisteel Technology Limited Self-tapping thread forming screw and corresponding thread roll die

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088366A1 (en) * 1982-03-05 1983-09-14 RICHARD BERGNER GMBH & CO Self-tapping screw
DE3207975A1 (en) * 1982-03-05 1983-09-15 Richard Bergner GmbH & Co, 8540 Schwabach THREAD SELF-FORMING SCREW
US4527932A (en) * 1982-03-05 1985-07-09 Richard Bergner Gmbh & Co. Self-tapping screw
US4842467A (en) * 1984-08-24 1989-06-27 Yamashina Seiko-Sho, Ltd. Concrete screw
AT389923B (en) * 1988-01-29 1990-02-26 Sfs Stadler Ag SELF-DRILLING AND THREADING SCREW FOR TURNING INTO GAS-CONCRETE
EP2160518A1 (en) * 2007-06-20 2010-03-10 Unisteel Technology International Limited Thread forming screw thread and corresponding thread roll die
EP2160518A4 (en) * 2007-06-20 2014-03-12 Unisteel Technology Internat Ltd Thread forming screw thread and corresponding thread roll die
WO2010093329A1 (en) * 2009-02-16 2010-08-19 Unisteel Technology Limited Self-tapping thread forming screw and corresponding thread roll die

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