DK141261B - Screw or nut. - Google Patents

Screw or nut. Download PDF

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Publication number
DK141261B
DK141261B DK314875AA DK314875A DK141261B DK 141261 B DK141261 B DK 141261B DK 314875A A DK314875A A DK 314875AA DK 314875 A DK314875 A DK 314875A DK 141261 B DK141261 B DK 141261B
Authority
DK
Denmark
Prior art keywords
nut
screw
recesses
screw head
turning
Prior art date
Application number
DK314875AA
Other languages
Danish (da)
Other versions
DK141261C (en
DK314875A (en
Inventor
Sven Robert Svensson
Nils Gustav Dernmar
Original Assignee
Gunnar Jirving Ab
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 Gunnar Jirving Ab filed Critical Gunnar Jirving Ab
Publication of DK314875A publication Critical patent/DK314875A/da
Publication of DK141261B publication Critical patent/DK141261B/en
Application granted granted Critical
Publication of DK141261C publication Critical patent/DK141261C/da

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/005Measures against unauthorised operation of bolts, nuts or pins

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Refuse Collection And Transfer (AREA)
  • Transmission Devices (AREA)

Description

(il (11) FREMLÆ66ELSESSKRIFT 141261 DANMARK »D |n, c|a f i| | |3/oo «(21) Ansøgning nr. 5148/75 (22) Indleveret den 11. jul, 1975 (23) Løbedag 11. Jul. 1975 (44) Ansøgningen fremlagt og(il (11) PRESENTATION 141261 DENMARK "D | n, c | afi | | | | 3 / oo" (21) Application No. 5148/75 (22) Filed on 11 Jul, 1975 (23) Running Day 11 Jul. 1975 (44) The application presented and

fremleggelaeeakrlftet offentliggjort den 11. f eb. ) ggQpresented on 11 February. ) ggQ

DIREKTORATET FORDIRECTORATE OF

PATENT-OG VAREMÆRKEVÆSENET <*» Prioritet begæret fra denPATENT AND TRADE MARKET <* »Priority requested from it

8. aug. 1974, 7410159, SEAug 8 1974, 7410159, SE

(71) AKTIEBOLAGET GUNNAR JIRVING, G.a Soedertaeljevaegen 125a Box 5005/ "(71) SHARE COMPANY GUNNAR JIRVING, G.a Soedertaeljevaegen 125a Box 5005 / "

Huddinge 5a SE.Huddinge 5a SE.

(72) Opfinder: Sven Robert Svensson, Lignellsvaegen 25a 147 00 Tumba, SE: Nils Gustav Dernmar, Mossvaegen 17a 150 20 Jaerna, SE.(72) Inventor: Sven Robert Svensson, Lignellsvaegen 25a 147 00 Tumba, SE: Nils Gustav Dernmar, Mossvaegen 17a 150 20 Jaerna, SE.

(74) Fuldmægtig under sagens behandling;(74) Clerk of the case;

Skandinavisk Patent Bureau v/Prode Larsen.Scandinavian Patent Bureau v. Prode Larsen.

(54) Skrue eller møtrik. ^*"(54) Screw or nut. ^ * "

Opfindelsen angår en skrue eller møtrik af den art, hvor skruehovedet eller møtrikken har en konisk yderflade, der strækker sig fra skruehovedets eller møtrikkens anlægsflade, hvor den har sin største omkreds, til 5 enden af skruehovedet eller møtrikken, i hvilken yderflade der findes mindst to fordybninger, hvori tappe på et drejeværktøj kan indgribe.The invention relates to a screw or nut of the kind in which the screw head or nut has a tapered outer surface extending from the abutment surface of the screw head or nut, where it has its largest circumference, to the end of the screw head or nut, in which there is at least two recesses in which pins on a turning tool can engage.

Det er temmelig almindeligt, at uvedkommende personer fjerner skruer og møtrikker, f. eks. på offentlige be-10 lysningsmaster, og derved fjerner derpå anbragte beskyttelseslemme for elektriske sikringer og koblingsudstyr og bevirker skade på disse. Sådanne skader er ofte meget kostbare at reparere, hvorfor der længe har fore-ligget behov for skruer og møtrikker med sikkerhedsan- 141261 2 ordninger, der forhindrer fjernelse.It is quite common for unauthorized persons to remove screws and nuts, for example, on public lighting masts, thereby removing attached protective fuses for electrical fuses and switchgear and causing damage to them. Such damage is often very costly to repair, which is why there has long been a need for screws and nuts with safety devices to prevent removal.

De kendte skruer af den ovenfor nævnte art løser ikke dette problem, for ved hjælp af almindeligt tilgængeligt dreje- eller gribeværktøj kan disse skruer 5 løsnes.The known screws of the kind mentioned above do not solve this problem, because by means of commonly available turning or gripping tools, these screws 5 can be loosened.

Det er opfindelsens formål at anvise en skrue eller møtrik af den nævnte art, der ikke kan fjernes uden hjælp af specialfremstillet drejeværktøj.It is the object of the invention to provide a screw or nut of the said type which cannot be removed without the aid of custom-made turning tools.

Det opnås ifølge opfindelsen ved, at fordybningerne 10 i den koniske yderflade er rettet i retning af yderfladens normal. Det medfører, at det er næsten umuligt u-den et specialværktøj at kunne få indgreb i skruehovedet eller møtrikken, for et almindeligt drejeværktøj glider blot omkring skruehovedet eller møtrikken, og et fast 15 indgreb i fordybningerne kan ikke opnås. Et specialværktøj til indgreb ved fjernelsen må være udstyret med i det mindste to skråt mod hinanden rettede tappe, som indføres samtidig i mindst to fordybninger, for at et fast indgreb skal kunne opnås på en sådan måde, at skru-20 en eller møtrikken kan drejes.This is achieved according to the invention in that the recesses 10 in the conical outer surface are directed in the direction of the normal surface of the outer surface. As a result, it is almost impossible without a special tool to be able to engage the screw head or nut, for a conventional turning tool simply slides around the screw head or nut and a firm engagement with the grooves cannot be achieved. A special tool for engagement in removal must be provided with at least two obliquely aligned pins, which are inserted simultaneously in at least two recesses, in order for a fixed engagement to be achieved in such a way that the screw or nut can be turned. .

'1 det følgende skal opfindelsen forklares nærmere under henvisning til tegningen, hvor fig. 1 viser en udførelsesform for en skrue ifølge opfindelsen i perspektivisk afbildning, og 25 fig· 2 en udførelsesform for en møtrik ifølge opfin delsen i perspektivisk afbildning.In the following, the invention will be explained in more detail with reference to the drawing, in which fig. 1 shows an embodiment of a screw according to the invention in perspective view, and FIG. 2 shows an embodiment of a nut according to the invention in perspective view.

I fig. 1 betegner 10 den skrueskårne del af en skrue og 11 skruens hoved med en anlægsflade 12. Skruehovedet har en konisk yderflade 13» og i denne findes fordybning-30 er 14 og 14'. Fordybningerne 14 og 14' er rettet i retning af normalen til den koniske yderflade 13 og er i tværsnit cirkelformede og har op til fladen 13 en skrå fas, så at tappene på et drejeværktøj bekvemt kan indføres i fordybningerne 14 og 14', hvis vægge kan være cy-35 lindriske.In FIG. 1, 10 denotes the screw-cut portion of a screw and 11 the head of the screw with a abutment surface 12. The screw head has a tapered outer surface 13 »and in it are recesses 14 and 14 '. The recesses 14 and 14 'are directed in the direction of the normal to the conical outer surface 13 and are in circular cross-section and have up to the surface 13 an inclined phase, so that the pins of a turning tool can be conveniently inserted into the recesses 14 and 14', the walls of which can be cylindrical.

I fig. 2 betegner 15 en indvendigt skrueskåren møtrik med en anlægsflade 12*. Møtrikken 15 har en konisk yder- 141261 3 flade 13', og i denne flade findes fordybninger 14" og 14"». Fordybningerne 14" og 14’” og yderfladen svarer til og er rettet på samme måde som ved skruehovedet i fig. 1. Møtrikken kan også udgøres af en såkaldt kupol-5 møtrik, hvis øvre endeparti dækker det skrueskåme parti.In FIG. 2 represents 15 an internally screw-cut nut with a bearing surface 12 *. The nut 15 has a conical outer surface 13 ', and in this surface are recesses 14 "and 14". The recesses 14 "and 14 '" and the outer surface correspond to and are aligned in the same manner as at the screw head of Fig. 1. The nut may also be constituted by a so-called dome 5 nut, the upper end of which covers the screw cap portion.

Det til drejning af skruen eller møtrikken bestemte drejeværktøj kan være konstrueret på flere måder. Det for værktøjet væsentlige er, at det er udformet med 10 mindst to i forhold til hinanden bevægelige kæber, der hver har en tap til indgribning i en fordybning 14, 14', 14", 14*". Ved kæbernes bevægelse mod hinanden skal kæbernes tappe samtidig indføres i hver sin fordybning 14, 14', henholdsvis 14", 14"*. Drejeværktøjets kæber kan 15 være anbragt i en tang eller chuok. Hvis kæberne er anbragt i en chuck, kan antallet af dem være tre eller flere, hvilket medfører, at den koniske yderflade 13, henholdsvis 13*, kan have tre eller flere fordybninger 14, 14*, 14", 14"*, hvori tappene kan indføres samtidigt, 20 til drejning af skruen eller møtrikken.The turning tool provided for turning the screw or nut may be constructed in several ways. What is important for the tool is that it is formed with at least two mutually movable jaws, each having a pin for engagement in a recess 14, 14 ', 14 ", 14 *". When moving the jaws towards each other, the jaws of the jaws must simultaneously be inserted into each recess 14, 14 'and 14 ", 14" * respectively. The jaws of the turning tool may be disposed in pliers or chuok. If the jaws are placed in a chuck, the number of them may be three or more, which means that the conical outer surface 13 or 13 *, respectively, may have three or more recesses 14, 14 *, 14 ", 14" *, in which the pins can be inserted simultaneously, 20 for turning the screw or nut.

På grund af, at yderflademe 13 og 13' er koniske i hele højden af skruehovedet 11, henholdsvis møtrikken 15, er det nødvendigt at anvende et med tappe forsynet specialfremstillet drejeværktøj til fastspænding eller 25 løsspænding af skruen eller møtrikken. Med et sædvanligt, på markedet forekommende værktøj er det ikke muligt at opnå et fast greb om skruehovedet 11 eller møtrikken 15, for den koniske yderflade 13, henholdsvis 13*, forhindrer dette effektivt.Because the outer surfaces 13 and 13 'are tapered throughout the height of the screw head 11 and the nut 15, respectively, it is necessary to use a tapered specially made turning tool for clamping or loosening the screw or nut. With a conventional tool available on the market, it is not possible to obtain a firm grip on the screw head 11 or the nut 15, for the tapered outer surface 13 or 13 *, respectively, effectively prevents this.

30 De koniske yderflader 13 og 13' kan i skruehovedets eller møtrikkens højderetning være konvekst eller konkavt formet i stedet for med retliniet frembringer. Fordybningerne 14, 14', 14", 14*" kan have mangesidet tværsnit i stedet for rundt tværsnit.The conical outer surfaces 13 and 13 'may be convex or concave in the height direction of the screw head or nut instead of with the straight line generating. The recesses 14, 14 ', 14 ", 14 *" may have multifaceted cross sections instead of round cross sections.

DK314875AA 1974-08-08 1975-07-11 Screw or nut. DK141261B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7410139 1974-08-08
SE7410139A SE7410139L (en) 1974-08-08 1974-08-08 DEVICE FOR SCREW OR NUT.

Publications (3)

Publication Number Publication Date
DK314875A DK314875A (en) 1976-02-09
DK141261B true DK141261B (en) 1980-02-11
DK141261C DK141261C (en) 1980-08-04

Family

ID=20321848

Family Applications (1)

Application Number Title Priority Date Filing Date
DK314875AA DK141261B (en) 1974-08-08 1975-07-11 Screw or nut.

Country Status (4)

Country Link
DK (1) DK141261B (en)
FI (1) FI752097A (en)
NO (1) NO136808C (en)
SE (1) SE7410139L (en)

Also Published As

Publication number Publication date
SE7410139L (en) 1976-02-09
DK141261C (en) 1980-08-04
NO136808C (en) 1977-11-09
NO136808B (en) 1977-08-01
DK314875A (en) 1976-02-09
FI752097A (en) 1976-02-09
NO752398L (en) 1976-02-10

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