SE515979C2

SE515979C2 - Clamp with pre-assembled fixing screw, for mounting of cladding plate on a support

Info

Publication number: SE515979C2
Application number: SE9904013A
Authority: SE
Inventors: Bjarne Svanberg
Original assignee: Bjarne Svanberg
Priority date: 1999-11-04
Filing date: 1999-11-04
Publication date: 2001-11-05
Also published as: DE60012109D1; EP1098047B1; SE9904013L; SE9904013D0; EP1098047A1; DE60012109T2

Abstract

A clip having a pre-mounted fastener screw for mounting covering sheets, such as roofing sheets, onto an underlying surface, said clip including a base plate (1) that has an opening in which a screw (5) is pre-mounted and extends generally normal to the plane of the base plate (1), with the pointed tip (53) of the screw passing through the opening. The base plate (1) carries an attachment tongue (13) which is intended to be fastened to a covering sheet that is to be anchored to the underlying surface via the base plate (1) and the screw (5). The clip includes two elongate and mutually opposing tongues whose longitudinal extensions lie in an axial plane to said opening perpendicular to the base plate. The tongues are bent up at an acute angle from the base plate and the three short-edges (41), which are concave, of said tongues engage the stem (41) of the screw (5) at generally similar heights above the base plate (1). <IMAGE>

Description

lO 15 20 25 515 979" z I samband med tillverkningen av en särskilt föredragen utfö- ringsform av uppfinningen, i vilken klammerns basplatta består av metallplàt, stansas genom denna metallplåt två parallella slitsar i ett inre område av metallplàtens area, och stansas en företrädesvis kvadratisk öppning, som diagonalt utbreder sig mellan slitsarna vid deras längdmittområde, så att två lång- sträckta motsatt riktade tungor bildas, vilkas fria kortändar, som kommer att kontakta motsatta sidor av skruvskaftet, är all- mänt konkava, exempelvis V-format urklippta. Dessa tungor böjes upp en spetsig vinkel från plàtens plan kring sin godsfasta an- slutning till metallplâten, så att avståndet mellan tungorna via kortändar motsvarar skruvskaftets (kärnans) diameter. Skru- vens spetsdel sträcker sig genom den spalt som friläggs i me- tallplåtens plan, varvid spaltens kanter stöder mot motsatta sidor av skruvskaftets kärna. Härigenom stabiliseras den för- monterade skruven formbundet mot svängning i ett plan som är vinkelrätt mot metallplåtens plan och mot slitsarnas längdrikt- ning. Skruven stabiliseras även mot svängning i ett plan som är vinkelrätt mot plåtens plan och parallellt med slitsarna, tack vare ett högt förskjutningsmotstånd för skruvens spetsdel längs spalten, genom friktion och på grund av skruvgängan. In connection with the manufacture of a particularly preferred embodiment of the invention, in which the base plate of the staple consists of sheet metal, two parallel slots are punched through this metal sheet in an inner area of the area of the sheet metal, and a preferably square opening, which extends diagonally between the slots at their longitudinal center area, so that two elongate oppositely directed tongues are formed, the free short ends of which will contact opposite sides of the screw shank are generally concave, for example V-shaped cut-outs. bends at an acute angle from the plane of the plate around its perpendicular connection to the metal plate, so that the distance between the tongues via short ends corresponds to the diameter of the screw shaft (core ).The tip part of the screw extends through the gap exposed in the plane of the metal plate. edges abut opposite sides of the core of the screw shaft, thereby stabilizing the pre-assembled screw form-retained against pivoting g in a plane perpendicular to the plane of the sheet metal and to the longitudinal direction of the slots. The screw is also stabilized against pivoting in a plane perpendicular to the plane of the plate and parallel to the slots, thanks to a high displacement resistance for the tip part of the screw along the gap, by friction and due to the screw thread.

I den uppfinningsenliga konstruktionen är slitsarna, som av- gränsar tungornas làngkanter, tangentiella till skruvöppningen ii plåtens plan.In the construction according to the invention, the slits, which delimit the long edges of the tongues, are tangential to the screw opening in the plane of the plate.

När skruven skruvas in i underlaget, knäcks tungorna. Om skruv- skallen har en konisk undersida, kommer denna att tränga ned genom spaltöppningen och kan därvid böja ned de närliggande randdelarna av metallplåten. Klammern kan vara utförd som glid- klämmer.When the screw is screwed into the base, the tongues break. If the screw head has a conical underside, this will penetrate through the gap opening and can thereby bend down the adjacent edge parts of the metal plate. The clamp can be designed as a sliding clamp.

Uppfinningen kommer i det följande att beskrives i exempelform med hänvisning till den bilagda ritningen.The invention will be described in the following in an exemplary form with reference to the accompanying drawing.

Fig l visar en planvy över en klämmer enligt uppfinningen.Fig. 1 shows a plan view of a clamp according to the invention.

Fig 2 visar en vy tagen utmed linje II-II i fig l.Fig. 2 shows a view taken along line II-II in Fig. 1.

(N 15 20 25 30 35 515 979 y v -. 3- Fig 3 visar schematiskt en sektion tagen utmed linje III-11: 1 fig 1. annan: Q n 0 Cannon Fig 4 visar en sektionerad vy tagen utmed linje IV-IV i fig 3.(N 15 20 25 30 35 515 979 yv -. 3- Fig. 3 schematically shows a section taken along line III-11: 1 fig 1. other: Q n 0 Cannon Fig. 4 shows a sectioned view taken along line IV-IV in. fig 3.

Fig 5 visar en variant av föremålet för fig 3 exklusive skruven, i en avbildning motsvarande fig 3.Fig. 5 shows a variant of the object of Fig. 3 excluding the screw, in a view corresponding to Fig. 3.

Fig 6 visar en vy tagen utmed linje VI-VI i fig 5.Fig. 6 shows a view taken along line VI-VI in Fig. 5.

Den på ritningen illustrerade klammern omfattar en basplatta 1 som omfattar ett i huvudsak plant långsträckt rektangulärt metall- plåtstycke, vilket utmed sin ena långkant har en omböjd sarg 11 vil- ken emottar ett omböjt ändparti 12 av en fästtunga 13 som är avsedd att anslutas till en takplåt eller dylikt. Sargen ll kan vid sina ändar 14 vara hopklämd för begränsning av tungans 13 förskjutbarhet längs sargen ll. Vidare har plåten 1 utmed vardera långkanten en förstyvningssickning 16.The clamp illustrated in the drawing comprises a base plate 1 which comprises a substantially flat elongate rectangular sheet metal piece, which along its one long edge has a bent rim 11 which receives a bent end portion 12 of a mounting tongue 13 which is intended to be connected to a roofing sheet or the like. The rim 11 may at its ends 14 be clamped to limit the displaceability of the tongue 13 along the rim 11. Furthermore, the plate 1 along each long edge has a stiffening groove 16.

Två längsträckta motsatt riktade tungor 4 är stansade i ett centralt område av plåten 1 och är riktade i plåtens 1 längdriktning, för att med sina fria kortändar 41 samverka med skaftkärnan 51 i en skruv 5 som är förmonterad vid klammern. Tungorna 4 är uppfällda från plå- tens 1 plan kring sin med plåten 1 godsfasta ände en spetsig vinkel, så att tungornas fria kortändar 41, som är konkava, stöder mot skruvskaftets kärna 51 vid i huvudsak samma nivå från plåtens 1 yta, med hänsyn till gängan 52. Tungornas 4 bredd motsvarar diametern för skruvkärnan 51. Tungorna bildas genom stansning ur plåten 1 varvid stansningen frambringar två parallella slitsar 44 och en rombisk öppning som överbryggar slitsarna 44 i deras längdmittområde, och som har motstàende hörn på slitsarna 44.Two elongate oppositely directed tongues 4 are punched in a central area of the plate 1 and are directed in the longitudinal direction of the plate 1, in order to cooperate with their free short ends 41 with the shaft core 51 in a screw 5 which is pre-assembled at the clamp. The tongues 4 are raised from the plane of the plate 1 around their acute end with the plate 1 at an acute angle, so that the free short ends 41 of the tongues, which are concave, support the core 51 of the screw shaft at substantially the same level from the surface of the plate 1, thread 52. The width of the tongues 4 corresponds to the diameter of the screw core 51. The tongues are formed by punching from the plate 1, the punching producing two parallel slits 44 and a rhombic opening which bridges the slits 44 in their longitudinal center region, and which have opposite corners of the slits 44.

I fig 3 kan man se att skruvens spetsdel 53 i förmonterat tillstànd sträcker sig genom den spaltöppning 60 som etableras i plàtens 1 plan efter tungornas 4 uppfällning. Genom att den förmonterade skru- ven stöds vid två axiellt åtskilda ställen, eæ%§ﬁ§s=enx§&äm§abi¿š: 10 15 20 25 ii erbjuds en god stabilitet för skruven relativt basplattan 1.In Fig. 3 it can be seen that the tip part 53 of the screw in the pre-assembled condition extends through the gap opening 60 which is established in the plane of the plate 1 after the tongues 4 have been raised. Because the pre-assembled screw is supported at two axially separated places, eæ% § ﬁ§ s = enx§ &äm§abi¿š: 10 15 20 25 ii is offered good stability for the screw relative to the base plate 1.

De konkava kortändarna 41 av tungan motverkar en svängning av skruven 5 i ett plan som är vinkelrätt mot tungornas 4 längd- riktning och plàtens 1 plan kring spetsdelens infästning i spaltöppningen 60. En svängning av skruven 5 kring infästnings- området mellan de motsatta fria ändarna 41 av tungorna i ett plan som är vinkelrätt mot plàtens 1 plan och innehåller tung- ornas 4 längdriktningar, motverkas av spetsdelens 53 glidfrik- tion med spaltens 60 långkanter 44 och av interferens mellan skruvgängan 52 och kanterna 44.The concave short ends 41 of the tongue counteract a pivoting of the screw 5 in a plane perpendicular to the longitudinal direction of the tongues 4 and the plane of the plate 1 around the attachment of the tip part in the gap opening 60. A pivoting of the screw 5 around the attachment area between the opposite free ends 41 of the tongues in a plane which is perpendicular to the plane of the plate 1 and contains the longitudinal directions of the tongues 4, is counteracted by the sliding friction of the tip part 53 with the long edges 44 of the gap 60 and by interference between the screw thread 52 and the edges 44.

Speciellt om klammern består av rostfri stålplåt kan det finnas en tendens till att tungorna/skruvhållarna 4 svänges i klammer- plattans 1 plan på grund av att tungans ändar 41 medbringas av skruven då denna gängas in i underlaget. När tungorna/hållarna 4 sedan böjs ned mot spaltöppningen 60 av skruvskallen, finns risk för att tungorna 4 partiellt överlappar spaltöppningens 60 kantdelar. Därför föredrages att bredda spaltöppningen 60 något, för att ge plats för tungorna 4 även om dessa blivit något svängda i sitt plan. Spaltbreddningarna 61 visas i fig 6. För att underlätta tungornas 4 knäckning kan dessa ges en svag bockning 47 (fig 5) i vertikalplanet och i längdmittområdet av respektive tunga, företrädesvis så att tungornas fria yttre änddelar är nedböjda relativt deras inre änddelar, innan skru- ven 5 inskruvas in i underlaget.Especially if the clamp consists of stainless steel plate, there may be a tendency for the tongues / screw holders 4 to pivot in the plane of the clamp plate 1 due to the ends 41 of the tongue being carried by the screw when it is threaded into the substrate. When the tongues / holders 4 are then bent down towards the gap opening 60 by the screw head, there is a risk that the tongues 4 partially overlap the edge parts of the gap opening 60. Therefore, it is preferred to widen the gap opening 60 slightly, to make room for the tongues 4 even if these have been slightly curved in their plane. The gap widths 61 are shown in Fig. 6. To facilitate the buckling of the tongues 4, these can be given a slight bend 47 (Fig. 5) in the vertical plane and in the longitudinal center region of the respective tongue, preferably so that the free outer end portions of the tongues are bent relative to their inner end portions. ven 5 is screwed into the substrate.

Claims

(H 10 15 20 25 30 35 515 979 s ccvcqe P a t e n t k r a v

1. Clamp with pre-assembled mounting screw, for mounting cladding sheet as roofing sheet on a base, the staple comprising a base plate (1) having an opening in which a screw (5) is pre-assembled to extend substantially in the normal direction to the plane of the base plate (1) and with its tip part (53) through the opening, the base plate (1) carrying an attachment tongue (13) which is intended to be attached to a cladding plate which via the base plate (1) and the screw (5) anchored in the base, and wherein tongues (4) which at one end are fixedly connected to the base plate, have an opposite free end which contacts the screw (5), characterized in that the clamp comprises two elongate opposite tongues, the longitudinal directions of which extend in an axial plane perpendicular to the base plate to the opening, that the tongues are bent at an acute angle from the base plate and engage with their free short edges (41), which are concave, with the shaft (41) shaft (41) at a substantially equal level above the base plate ( 1).

Staple according to Claim 1, characterized in that the base plate consists of metallic sheet, that the tongues (4) are fixed to the base plate and are punched out of the base plate, and that the width of the tongues (4) corresponds to the diameter of the screw shaft (51). so that the deflection of the tongues (4) from the base plate exposes an elongate gap opening (60) through the plate of the base plate.

Staple according to Claim 1 or 2, characterized in that the longitudinal direction of the tongues (4) is parallel to the longitudinal direction of the base plate (1).

Staple according to one of Claims 1 to 3, characterized in that the base plate has a continuous circular opening (48) for additional fastening elements at each end.

Clamp according to one of Claims 1 to 4, characterized in that the fastening tongue (13) has a slidable connection (11, 12) to the base plate 10 for displaceability along it, whereby the clamp is a slidable member. c oonuon ø I o caucus clamps.

Staple according to one of Claims 1 to 5, characterized in that the screw head has a conical underside.

Staple according to one of Claims 1 to 5, characterized in that the screw head has a substantially flat underside.

Staple according to one of Claims 2 to 7, characterized in that the gap opening (60) is widened (61) outside its longitudinal center region in order to allow the tongues (4) to be received in the gap opening (60, 61) even if they are at the screw inlet. turns slightly clockwise.

Staple according to one of Claims 1 to 8, characterized in that the tongues (4) are pre-bent (47) in the vertical plane in order to break more easily when the screw (5) is screwed into the base.