NO761908L - - Google Patents
Info
- Publication number
- NO761908L NO761908L NO761908A NO761908A NO761908L NO 761908 L NO761908 L NO 761908L NO 761908 A NO761908 A NO 761908A NO 761908 A NO761908 A NO 761908A NO 761908 L NO761908 L NO 761908L
- Authority
- NO
- Norway
- Prior art keywords
- screw
- self
- thread
- tapping
- threaded
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 6
- 239000011449 brick Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 241001661918 Bartonia Species 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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
- 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
- F16B25/0052—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 having indentations, notches or the like in order to improve the cutting behaviour
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Dowels (AREA)
Description
Selvgjengende skrue.Self-tapping screw.
Foreliggende oppfinnelse angår en selvgjengendeThe present invention relates to a self-propelled
skrue, spesielt for bruk i hardt materiale, så som tegl, betong og sten. screw, especially for use in hard material, such as brick, concrete and stone.
Den konvensjonelle selvgjengende skruen ligner påThe conventional self-tapping screw is similar to
sett og vis en gjengetapp idet gjengene på et eller flere avsnitt rundt skruens omkrets er tvert avskåret, slik at det oppstår skarpe, skjærende kanter som skjærer gjenger i den gjenstand der skruen skal fastsettes. Slike skruer benyttes normalt i plater, plast og til en viss grad i lettbetong. insert and show a threaded stud, as the threads on one or more sections around the screw's circumference are cut off, so that sharp, cutting edges are created that cut threads in the object where the screw is to be fixed. Such screws are normally used in sheets, plastic and to some extent in lightweight concrete.
Man har også foreslått skruer med et stort sett triangulært tverrsnitt. Hver gjengeedanner da tre radialt ut-stikkende spisser mellom hvilke gjengen forløper temmelig rett-linjet. Hensikten :er at de nevnte spissene skal forme gjenger i den gjenstand der skruen innsettes ved plastisk deformasjon. Screws with a largely triangular cross-section have also been proposed. Each thread then forms three radially protruding points between which the thread runs in a fairly straight line. The purpose: is for the aforementioned tips to form threads in the object where the screw is inserted by plastic deformation.
Også slike skruer benyttes normalt i dlåter, plast og til en viss grad i lettbetong. Such screws are also normally used in sheet metal, plastic and to some extent in lightweight concrete.
Gjengeskjærende skruer av den førstnevnte typen erThread cutting screws of the former type are
av iøyenfallende årsaker ikke brukbare i hardt materiale, så som tegl, betong og sten, efter som noen gjengeskjæring i slikt materiale ikke er tenkbart. Heller ikke er de plastisk deformerende, selvgjengende skruene tenkbare for bruk i et slikt hardt materiale. for obvious reasons not usable in hard material, such as brick, concrete and stone, as any thread cutting in such material is not conceivable. The plastically deforming, self-tapping screws are also not conceivable for use in such a hard material.
Foreliggende oppfinnelsenhar tatt sikte på å skape en selvgjengende skrue som fyller det ovennevnte krav på å være brukbar i slike harde materialer som tegl, betong , sten og lignende. For det angitte formål har skruen ifølge oppfinnelsen fått en utformning som angis prinsippielt i hovedkravets kjennetegnende del. The present invention has aimed to create a self-tapping screw which fulfills the above-mentioned requirement of being usable in such hard materials as brick, concrete, stone and the like. For the stated purpose, the screw according to the invention has been given a design which is stated in principle in the characterizing part of the main claim.
Oppfinnelsen skal i det følgende forklares nærmereThe invention will be explained in more detail below
under henvisning til tegningen som iwith reference to the drawing as i
fig. 1 viser et sideriss av et utførelseseksempéllfig. 1 shows a side view of an exemplary embodiment
for skruen ifølge oppfinnelsen.for the screw according to the invention.
Fig. 2 viser et tverrsnitt gjennom skruen efterFig. 2 shows a cross-section through the rear screw
II-II i fig. 1,II-II in fig. 1,
fig. 3 viser i større målestokk det parti av tverr-snittet i fig. 2 som er innringet ved hjelp av sirkelen A i fig. 2. fig. 3 shows on a larger scale that part of the cross-section in fig. 2 which is circled by means of the circle A in fig. 2.
Fig. 4 og 5 viser'i utbredd form to noe forskjellige gjengeavsnittsformer. Fig. 4 and 5 show in expanded form two slightly different thread section shapes.
Den i.Cfig. 1 viste skruen består av en gjenget stammeThe in.Cfig. The screw shown in 1 consists of a threaded stem
10 med et konvensjonelt sekskanthode 11. Skruestammens spiss10 with a conventional hexagon head 11. The tip of the screw stem
12 er noe konisk, men også andre spissformer kan komme på tale. 12 is somewhat conical, but other pointed shapes can also be used.
Skruestammens gjenge, generelt betegnet 13, bestårThe thread of the screw stem, generally designated 13, consists
av flere efter hverandre i skruelinjeform påfølgende gjengeavsnitt 13a,13b,13c mellom hvilke det dannes avbrudd eller luker 14. of several successive threaded sections 13a, 13b, 13c one after the other in helical form, between which interruptions or hatches 14 are formed.
I det minste den i itrekkingsretningensfremre enden av hvert gjengeavsnitt, så som f.eks.enden 15 i fig. 3>er mykt avrundet, som vist i fig. 33men begge de fremre og bakre endene av hvert gjengeavsnitt kan være mykt avrundet. At least the front end of each threaded section in the direction of retraction, such as, for example, end 15 in fig. 3> is softly rounded, as shown in fig. 33but both the front and rear ends of each thread section may be softly rounded.
Krumningsradien Rr (fig. 3) pa gjengeavsnittetsThe radius of curvature Rr (fig. 3) of the threaded section
fremre ender tilpasser seg efter det for hvert tilfelle aktuelle vesentlige bruksområder, og kan ligge innen området fr.veks. front ends adapt according to the relevant significant areas of use in each case, and can lie within the area of fr.veks.
0,5 til 2 ganger gjengeavsnittets radielle høyde og skruestammens forøvrig sylindriske flate, og krumningen kan være tilnærmelses-vis helt sirkulær eller ha form av en noe avflatende kurve-, 0.5 to 2 times the radial height of the thread section and the otherwise cylindrical surface of the screw stem, and the curvature can be approximately completely circular or take the form of a slightly flattening curve,
som vist ifig. 3- Den nevnte, radielle høyden på gjengeavsnittene kan gå opp til fveks-v: størrelsesorden omkring 10 as shown in fig. 3- The mentioned, radial height of the thread sections can go up to fveks-v: order of magnitude around 10
til 15% av skruegjengens ytterdiameter. Gjengeavsnittenes 13a, 13b, 13c lengder i skruens omkrefcsretning kan være slik at tre avsnitt med mellomliggende.luker fås pr. omdreining, eventuelt méd en forskyvning i omkretsretningen, slik at aksielt mot hverandre svarende luker l43k<bmmeÉ fcilgå ligge efterrenlskruelinje med meget stor stigning i den ene eller andre retningen. Den av gjengeavsnittene 13a etc. bestående gjengen har hensiktsmessig en slik bredde, dvs. målet i skruens akseretning, og har slik stigning at skruestammen oppviser sylindriske partier mellom de enkelte gjengene. to 15% of the outer diameter of the screw thread. The lengths of the threaded sections 13a, 13b, 13c in the circumferential direction of the screw can be such that three sections with intermediate hatches are obtained per rotation, possibly with a displacement in the circumferential direction, so that axially corresponding hatches l43k<bmmeÉ fcilgo follow the helix line with a very large rise in one or the other direction. The thread consisting of the thread sections 13a etc. suitably has such a width, i.e. the measurement in the axial direction of the screw, and has such a pitch that the screw shank exhibits cylindrical sections between the individual threads.
Som vist ifig. 4 og 5 kan gj engeavsnittenes ender enten være utført slik at gjengeavsnittstoppene hele tiden har samme diameter (fig. 4), eller slik at gjengeavsnittståppene bøyer av inn mot skruestammens sylindriske flate. As shown in fig. 4 and 5, the ends of the threaded sections can either be made so that the threaded section tops always have the same diameter (fig. 4), or so that the threaded section tops bend towards the cylindrical surface of the screw stem.
Ved tiltrekking av en skrue ifølge opjjfinnelsen iWhen tightening a screw according to the invention i
et påfferhånd boret hull i hardt materiale av den angitte art, kommer de avrundede gjengeavsnittsendene til å medføre en knusing av materialet i hullets vegg til meget fint pulver som lett føres til sidene, og derved oppnås således ved knuse-formingen meget holdbar gjenge i materialet. a hand-drilled hole in hard material of the specified type, the rounded thread section ends will result in a crushing of the material in the wall of the hole into very fine powder that is easily carried to the sides, and thus a very durable thread in the material is obtained by crushing.
Modifikasjoner og detalj endringer kan foretas innann rammen for oppfinnelsesdfcankenæ Modifications and detail changes can be made within the scope of the invention patent
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7506443A SE398149B (en) | 1975-06-05 | 1975-06-05 | NATURAL SCREW |
Publications (1)
Publication Number | Publication Date |
---|---|
NO761908L true NO761908L (en) | 1976-12-07 |
Family
ID=20324764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO761908A NO761908L (en) | 1975-06-05 | 1976-06-04 |
Country Status (6)
Country | Link |
---|---|
DE (1) | DE2625372A1 (en) |
DK (1) | DK247776A (en) |
FI (1) | FI761600A (en) |
FR (1) | FR2313588A1 (en) |
NO (1) | NO761908L (en) |
SE (1) | SE398149B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2055652A (en) * | 1979-08-11 | 1981-03-11 | Gkn Fasteners Ltd | Self-drilling self tapping screw |
FR2514086A1 (en) * | 1981-10-05 | 1983-04-08 | Itw De France | ASSEMBLY DEVICE, IN PARTICULAR OF THE INSERT TYPE, FOR MAINTAINING ANY ELEMENT ON PLASTIC, SPECIAL, RIGID SUBSTRATES AND SUBJECTS WHICH ARE DETERIORATED AT FASTENING |
US4842467A (en) * | 1984-08-24 | 1989-06-27 | Yamashina Seiko-Sho, Ltd. | Concrete screw |
DE3620372C3 (en) * | 1986-06-18 | 1995-04-20 | Rockenfeller Gmbh & Co Kg | Nail for driving into pre-drilled holes on components made of hard material |
DE8804654U1 (en) * | 1988-04-08 | 1988-08-11 | Adolf Würth GmbH & Co. KG, 74653 Künzelsau | Self-drilling screw |
GB8819820D0 (en) * | 1988-08-20 | 1988-09-21 | Tucker Fasteners Ltd | Anchors for fixing to dense concrete masonry &c |
CH682450A5 (en) * | 1990-12-07 | 1993-09-30 | Protek Ag | Orthopaedic bone-implant anchoring pin - has retaining portions along spiral line around shank and with cutting edges towards head which is turned by tool |
DE19801102A1 (en) * | 1998-01-15 | 1999-07-22 | Toge Duebel A Gerhard Kg | Tapping screw |
DE102010031410A1 (en) * | 2010-07-15 | 2012-01-19 | TOGE-Dübel A. Gerhard KG | Self-centering screw |
-
1975
- 1975-06-05 SE SE7506443A patent/SE398149B/en unknown
-
1976
- 1976-06-04 DE DE19762625372 patent/DE2625372A1/en active Pending
- 1976-06-04 FR FR7616954A patent/FR2313588A1/en active Granted
- 1976-06-04 DK DK247776A patent/DK247776A/en unknown
- 1976-06-04 NO NO761908A patent/NO761908L/no unknown
- 1976-06-04 FI FI761600A patent/FI761600A/fi not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
SE7506443L (en) | 1976-12-06 |
FR2313588B3 (en) | 1979-02-23 |
DE2625372A1 (en) | 1976-12-23 |
FI761600A (en) | 1976-12-06 |
FR2313588A1 (en) | 1976-12-31 |
SE398149B (en) | 1977-12-05 |
DK247776A (en) | 1976-12-06 |
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