DK200600177U3 - Screw, especially of the farmer screw type - Google Patents
Screw, especially of the farmer screw type Download PDFInfo
- Publication number
- DK200600177U3 DK200600177U3 DK200600177U DKBA200600177U DK200600177U3 DK 200600177 U3 DK200600177 U3 DK 200600177U3 DK 200600177 U DK200600177 U DK 200600177U DK BA200600177 U DKBA200600177 U DK BA200600177U DK 200600177 U3 DK200600177 U3 DK 200600177U3
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- DK
- Denmark
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- screw
- screw head
- head
- washer
- farmer
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- Bolts, Nuts, And Washers (AREA)
Description
i DK 2006 00177 U3in DK 2006 00177 U3
Den foreliggende opfindelse angår en skrue af typen "farmerskrue" eller "blikkenslagerskrue", som er en skrue med bred anvendelighed, f.eks. til fastgøring af tyndplader på stål- eller træunderlag eller ved mange andre anvendelser, hvor det er ønskeligt at benytte skruer med en forholdsvis stor skruehoveddiameter. Ved traditionel skruefremstilling ud fra en streng af almindeligt kulstofstål eller rustfrit stål er det vanskeligt at frembringe skruer med nogen specielt stor diameter af skruehovedet. De hidtil kendte skruer i denne kategori er typiske ved, at de er tildannet med en bred hovedflange og med en derfra udstående polygonaltap, som kan gribes med en skruenøgle.The present invention relates to a screw of the type "farmer screw" or "plumber screw" which is a screw of wide applicability, e.g. for fastening thin sheets on steel or wood substrates or in many other applications where it is desirable to use screws with a relatively large screw head diameter. In traditional screw making from a strand of ordinary carbon steel or stainless steel, it is difficult to produce screws of any particularly large diameter of the screw head. The previously known screws in this category are typical in that they are formed with a wide head flange and with a protruding polygonal pin which can be gripped by a wrench.
Dette er af flere grunde ikke nogen ideel løsning, bl.a. fordi den udragende tap i mange sammenhænge kan virke uæstetisk og desuden være skidtsamlende, f.eks. ved at være opstående fra befæstede, tynde tagplader.This is, for a number of reasons, not an ideal solution. because the protruding tap can in many contexts appear unaesthetic and additionally be filthy, e.g. by being raised from fortified, thin roof panels.
Et vidt udbredt alternativ hertil er en benyttelse af helt sædvanlige skruer i forbindelse med en underlagsskive, som øger den geometriske dækning af det smallere skruehoved, hvorved skruen i sig selv kan fremstilles på billig konventionel måde, men designmæssigt eller æstetisk er dette ikke nogen attraktiv løsning. I mange sammenhænge ville det være langt at foretrække, at skruen kunne fremstå med et bredt, harmonisk formet skruehoved, fortrinsvis med en jævnt hvælvet form, som tillige ville neutralisere det opstående skruehoved med hensyn til skidtsamling, f.eks. ved brug til befæsti-gelse af tagplader på skrånende tage.A widespread alternative to this is the use of very ordinary screws in connection with a washer, which increases the geometric coverage of the narrower screw head, whereby the screw itself can be manufactured in a cheap conventional manner, but design or aesthetic is not an attractive solution . In many contexts, it would be far preferable for the screw to appear with a wide, harmonically shaped screw head, preferably with an evenly vaulted shape, which would also neutralize the raised screw head with respect to dirt assembly, e.g. when used for fastening roof panels on sloping roofs.
Det skal nævnes, at det allerede er praktiseret at udføre underlagsskiven med en sådan tværprofilering, at den danner en rundtgående udbuling omkring skruehovedet, hvorved skruehovedets karakter af fremspring nok kan elimineres, men dog stadigvæk med bibeholdelse af et synsindtryk af skruen som udpræget bestående af et "skruehoved med underlagsskive", hvor sidstnævnte nu nærmest fremstår som en "pyntering".It should be mentioned that it has already been practiced to perform the substrate disk with such a cross-profile that it forms a circumferential bulge around the screw head, whereby the nature of the screw head can probably be eliminated, but still maintaining a visual impression of the screw as markedly composed of a "screw head with washer", the latter now almost appearing as a "decoration".
Det skal yderligere nævnes, at det på velkendt måde er relevant at benytte underlagsskiver, som på deres undersider er påvulkaniseret en tætningsring af et elastomert materiale, som ved tilskruningen af skruen kan danne en effektiv tætning mellem skruehullet og skruehovedets omgivelser, dvs. en effektiv tætning af selve skruehullet. Det er ved opfindelsen også ønskværdigt, at denne tætningsmulighed kan bibeholdes.It is further to be noted that it is well known in the art to use substrate washers which, on their undersides, are vulcanized a sealing ring of an elastomeric material which, when tightening the screw, can form an effective seal between the screw hole and the screw head environment, ie. effective sealing of the screw hole itself. It is also desirable in the invention that this sealing option be maintained.
2 DK 2006 00177 U32 DK 2006 00177 U3
Opfindelsen er karakteristisk ved, at man opretholder en adskillelse imellem et skruehoved og en tilhørende underlagsskive, men med den væsentlige modifikation, at både skruehovedet og underlagsskiven er udført på en sådan måde, at de tilsammen vil danne en enhed med en praktisk taget umærkelig overgang mellem disse to dele, fortrinsvis ved at underlagsskiven har en rotationssymmetrisk profil på en sådan måde, at skruehovedet ved slutindskruningen danner en tætsluttende udfyldning i en central, konisk fordybning i underlagsskiven, medens skruehovedets overflade danner en naturlig fortsættelse af den omgivende yderside af underlagspladen, f.eks. til dannelse af en jævn hvælving. Selvom der på nært hold nok kan ses en ringaftegning af en overgang mellem skruehovedet og underlagsskiven, så vil denne nærmest opfattes som en ringstaffage, der ikke fratager enheden dens karakter af "eet stort skruehoved".The invention is characterized in that a separation between a screw head and the associated washer is maintained, but with the significant modification that both the screw head and the washer are designed in such a way that they together form a unit with a virtually imperceptible transition between these two parts, preferably in that the substrate disk has a rotationally symmetrical profile in such a way that the screw head forms a tightly sealed filling in a central conical recess in the substrate, while the surface of the screw head forms a natural continuation of the surrounding outer surface of the substrate plate. eg. to form a smooth vault. Although it is close enough to see a ring marking of a transition between the screw head and the washer, it will almost be perceived as a ring stafage that does not deprive the unit of its "one large screw head".
Princippet kan benyttes ved skruer både med og uden tætningsring på underlagsskiven. Navnlig hvor der ingen tætningsring findes, kan der ved en storhovedskrue optræde det forhold, at hovedet vil klemme skævt imod underlaget, ifald skruen indskrues en smule skævt, hvilket kan medføre en synlig deformation af underlaget og give anledning til et brækmoment på skruehovedet; det vil imidlertid ses, at denne uheldige virkning vil blive kraftigt reduceret ved skruen ifølge opfindelse, hvor der dog kan findes en vis vippelighed mellem underlagsskiven og det smallere faste skruehoved.The principle can be used with screws both with and without sealing ring on the washer. In particular, where there is no sealing ring, a large head screw can cause the head to squeeze skewed against the substrate, if the screw is screwed in slightly skewed, which can cause a visible deformation of the substrate and give rise to a fracture moment on the screw head; however, it will be seen that this unfortunate effect will be greatly reduced by the screw according to the invention, however, there may be some tilt between the support washer and the narrower fixed screw head.
Opfindelsen er nærmere illustreret på tegningen, på hvilken fig. 1 er et sidebillede af sammenhørende dele til dannelse af en skrue ifølge opfindelsen, fig, 2 et sidebillede af den samlede skrue, og fig. 3 et endebillede af dennes hoveddel fig. 4 viser skruen i underlagsskiven, hvor skruehovedets skrå kant er konkavt i stedet for med en lige konisk kant, fig. 5 viser skruen i underlagsskiven, hvor skruehovedets skrå kant er konveks i stedet for med en lige konisk kant.The invention is further illustrated in the drawing, in which FIG. 1 is a side view of associated parts for forming a screw according to the invention; FIG. 2 is a side view of the assembled screw; and FIG. 3 is an end view of the main part of FIG. 4 shows the screw in the backing disc, where the inclined edge of the screw head is concave instead of with a straight conical edge; FIG. 5 shows the screw in the washer, where the inclined edge of the screw head is convex instead of with a straight conical edge.
Den i fig. 1 viste skrue 2 med gevind 4 har et forholdsvis snævert, konisk hoved 6 med en kærv 8 af enhver ønsket udførelse. Ved den øvre ende af hovedet 6 forekommer en DK 2006 00177 U3 j forholdsvis skarp overgang 10 mellem den koniske sidevæg og en svagt hvælvet overside 12 af skruehovedet. En tilhørende underlagsskive 14 er udført som en pladering, der lige omkring sit centrale skruehul har en konisk centraldel 16 ganske svarende til formen af skruehovedet 6. Ved en skarpkantet overkant 18 overgår centraldelen 16 i 5 en yderdel 20 med modsat konisk form. fortrinsvis med let hvælvet form. Underlagsskiven kan på sin underside være påvulkaniseret en tætningsring 22.The FIG. 1 screw 2 with thread 4 has a relatively narrow conical head 6 with a notch 8 of any desired embodiment. At the upper end of the head 6 there is a relatively sharp transition 10 between the tapered side wall and a slightly vaulted upper side 12 of the screw head. An associated washer 14 is formed as a plate having just around its central screw hole a tapered central portion 16 quite similar to the shape of the screw head 6. At a sharp-edged upper edge 18, the central portion 16 in 5 exits an outer portion 20 of opposite conical shape. preferably with a slightly vaulted shape. On the underside of the substrate, a sealing ring 22 may be vulcanized.
Forholdene er således afpasset, at skruehovedet 6 i den samlede tilstand af delene jfr. lig. 2 vil danne en totaludfyldning af rummet i skivens centraldel 16. således at skrue-10 hovedets rand 10 støder umiddelbart op til overkanten 18 af underlagsskiven, og da de pågældende kanter er forholdsvis skarpe vil den tilhørende spalte være meget lidt synlig. Da der desuden er tale om overfladeforløb med jævn overgang vil den monterede skrue umiddelbart ytre sig som en harmonisk storhovedskrue.The conditions are such that the screw head 6 in the overall state of the parts cf. equal. 2 will form a complete fill of the space in the central part of the disc 16 so that the rim 10 of the head 10 is adjacent to the top edge 18 of the backing disc, and since the edges concerned are relatively sharp, the corresponding gap will be very visible. Furthermore, since these are smooth gradients, the mounted screw will immediately appear as a harmonic large head screw.
15 Det vil dog ikke være nogen begrænsning for opfindelsen, at den pågældende overgang skal være fuldstændig jævn, idet toppen af skruehovedet 6 f.eks. kunne fremstå som en lidt kraftigere udstående kuppeldel.However, it will not be a limitation of the invention that the transition in question should be completely smooth, the top of the screw head 6 e.g. could appear as a slightly more powerful protruding dome part.
Eventuelt kan sidevæggen af skruehovedet jfr. fig. 4 være svagt indadbuet mod en 20 tilsvarende konvekst buet form af skivens centraldel 16, således at der bedre kan opnås en jævn kraftoverføring, såfremt skruen indskrues en smule skævt. Omvendt kan der jfr. fig. 5 vælges et "buttet" skruehoved, som samvirker med en konkav buning på centralvæggen 16, hvorved en skævskruning bliver mindre synlig.Optionally, the sidewall of the screw head cf. FIG. 4 may be slightly inwardly bent towards a correspondingly convexly curved shape of the central portion 16 of the disc, so that a smooth power transmission can be better achieved if the screw is screwed in slightly slightly. Conversely, cf. FIG. 5, a "chubby" screw head is selected which cooperates with a concave bun on the central wall 16, thereby making a skew screw less visible.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK200600177U DK200600177U3 (en) | 2006-06-23 | 2006-06-23 | Screw, especially of the farmer screw type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK200600177U DK200600177U3 (en) | 2006-06-23 | 2006-06-23 | Screw, especially of the farmer screw type |
Publications (1)
Publication Number | Publication Date |
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DK200600177U3 true DK200600177U3 (en) | 2007-10-12 |
Family
ID=38577249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DK200600177U DK200600177U3 (en) | 2006-06-23 | 2006-06-23 | Screw, especially of the farmer screw type |
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DK (1) | DK200600177U3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013041107A1 (en) * | 2011-09-20 | 2013-03-28 | Dissing A/S | Fastening of a corrugated sheet in a roof construction or wall construction |
-
2006
- 2006-06-23 DK DK200600177U patent/DK200600177U3/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013041107A1 (en) * | 2011-09-20 | 2013-03-28 | Dissing A/S | Fastening of a corrugated sheet in a roof construction or wall construction |
US9091084B2 (en) | 2011-09-20 | 2015-07-28 | Dissing A/S | Fastening of a corrugated sheet in a roof construction or wall construction |
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