STRAP BINDING

Abstract: The invention relates to a strap binding for tensional strapping of objects, for instance bars, rods and similar. Said strap binding comprises a rigid stirrup (1) and a binding strap (9) extending therethrough, the latter enclosing an object (P) to be strapped whereby the binding strap is retained against falling out by means of a fixing screw (6) tensionally and in a form-locking way. The stirrup (1) is formed as an elongated channel shaped in a cross section essentially as a letter U and comprises a web (2) and flanges (3, 3') standing approximately perpendicularly thereto and having at each free end cuffs (4, 4') arranged approximately perpendicularly thereto. Said web (2) is formed preferably centrically to its longitudinal and transversal axes with a nut rim (5) arranged perpendicularly thereto. In the area of the nut rim (5) each flange (3, 3') is formed with a preferably rectangular cutout (8, 8') extending from the web (2) towards the cuff (4, 4') up to approximately half the length of each flange. A primary binding strap (9) is led through the cutouts (8, 8') and around the object (P) to be tied. A holding or a tightening screw (6) is screwed into the nut rim (5) and comprises a suitable shaped screw-end at its first end and a suitably shaped holding portion that is subjected to the application purpose and at its opposite end.

Description: Strap binding The present invention relates to a strap binding for tensional strapping of objects, for instance bars, rods and similar, whereby said strap binding composes a rigid stirrup and a binding strap extending therethrough, the latter enclosing an object to be strapped whereby the binding strap is retained against falling out by means of a fixing screw tensionally and in a form-locking way The above mentioned strap bindings are generally known They are used for example for fixing a hose onto a pipe extension A disadvantage of said strap bindings lies in the fact that they are made only for a pre-set range of binding diameters, thus they are not universally suitable for all diameters Another disadvantage lies in the fact that some embodiments require a special tool to tighten the binding strap, yet another requires at least two persons, one stretching the strap and another tightening up the screw A further disadvantage is that specially adapted and adjusted binding straps are to be used for all types of strap bindings, e g binding straps compnsing punched holes or grooves If the above-mentioned drawbacks are taken into consideration, the aim of the invention is to create a strap binding which would allow a quick and easy tying and binding of objects of larger diameters, that are basically unknown in advance, without any need to have recourse to a special tool or more persons or specially adapted binding straps The set goal has been attained with a strap binding according to the invention composing a stirrup which is formed as an elongated channel shaped in a cross-section esentially as a letter U and composes a web and flanges standing approximately perpendicularly thereto which at each free end comprise cuffs arranged approximately perpendicularly thereto The web is preferably formed centπcally to its longitudinal and transversal axes, with a nut πm arranged perpendicularly thereto into which a holding, or better, a tightening screw is screwed The latter comprises a suitably shaped screw-end at its first end and a suitably shaped holding portion subjected to the application purpose at its opposite end Said nut πm can alternatively be shaped as a nut welded onto the web An eye bolt, a lifting eye bolt, an eyelet bolt or similar can be used as the holding or tightening screw The screw-end of said screw can have a form of a chamfered end, a truncated cone point or similar When tying an object (P), a force exerted onto the binding strap via screw-end of the screw causes that, according to the principle of deep drawing, the screw-end essentially penetrates into the superposed layers of the binding strap thus creating a tensional and form-locking connection and ensuring good holding of said strap In the area of the nut πm each flange of the stirrup is formed with a preferably rectangular cutout extending from the web towards the cuff up to approximately half the length of each flange The binding strap is led through the cutouts intended to strap or tie an object or a bundle of objects Moreover, in the transitional area of each flange into the cuff and preferably centncally to the web and coaxially with the holding or tightening screw, preferably a rectangular cutout is formed the ends of which are folded inwards along the cuffs The holding strap prevents the flanges from spreading when the binding strap is stretched In its lower rim area and axially to the screw below said cutout, each cuff is formed with a step extending from the edge of the cuff towards said cutout According to the invention it can be foreseen that each flange is formed with at least two through- holes extending perpendicularly thereto, which are preferably arranged symmetrically to the longitudinal axis of the screw and are intended for screws for fixing another beam or auxiliary means Furthermore, according to the invention each cuff can be formed with a pair of rectangular cutouts being distant from the center-line of the screw and intended to receive auxiliary fixing or binding straps The strap binding according to the invention can be made of a metal sheet according to the process of cold forming, or cast, whereby in the latter case it comprises a web arranged between the flanges and integral therewith, which prevents the flanges from spreading The invention is further described in more detail on the basis of the preferred embodiments, reference being made to the accompanying drawings, in which Fig 1 shows an elevation of a strap binding according to the invention and Fig 2 shows a strap binding of Fig 1 in cross-section along the line II-II A stirrup 1 of the strap binding according to the invention is formed as an elongated channel shaped in a cross-section (Fig 2) essentially as a letter U and comprises a web 2 and flanges 3, 3' standing approximately perpendicularly thereto and having at each free end cuffs 4, 4' arranged approximately perpendicularly thereto The latter are intended to lie against an object or a bundle of objects P that is/are to be tied or tightened with a strap binding according to the invention, e g onto a concrete post of an electric conduit with a diameter that changes in length The web 2 is preferably formed centπcally to its longitudinal and transversal axes with a nut nm 5 arranged perpendicularly thereto into which either a holding or a tightening screw 6 is screwed The πm 5 is formed either by a process of deep drawing and additional cut-in of an internal thread or is just an ordinary nut welded to the web 2, for instance At its first end, the screw 6 composes a suitably shaped screw-end which can have a form of a chamfered end or a truncated cone point, at its opposite end there is a suitably shaped holding portion that is subjected to the application purpose The screw 6 can be an eye bolt, a lifting eye bolt, an eyelet bolt or similar On the side averted from an object P the web 2 further composes multiple bulges 7 arranged symmetrically to their longitudinal and transversal axes intended to support an auxiliary element resting against the web 2 on said side In the area of the nut om 5 each flange 3, 3' is formed with a preferably rectangular cutout 8, 8 1 through which a pomary binding strap 9 is led Each cutout 8, 8' extends from the web 2 towards the cuff 4, 4' up to approximately half the length of each flange Each flange 3, 3' is further formed with at least two through-holes 10, 11 extending perpendicularly thereto which are preferably arranged symmetrically to the longitudinal axis of the screw 6 The through-holes 10, 1 1 are intended for screws for fixing another beam or auxiliary means In the transition area of each flange 3, 3' into the cuff 4, 4' and preferably centπcally to the web 2 and coaxially with the screw 6 preferably a rectangular cutout 12, 12' is formed Each cuff 4, 4' is formed in its πm area and axially with the screw 6 below the cutout 12, 12' with a step 13, 13' extending from the edge of the cuff 4, 4' towards the cutout 12, 12' Each cuff 4, 4' is further formed with a pair of rectangular cutouts 14, 14' being distant from the center-line of the screw 6 and intended to receive secondary, I e auxiliary, fixing or binding straps, respectively The stirrup 1 is made of a metal sheet by means of the process of cold forming and punching It can alternatively be made by means of casting or forging process and subsequent finishing of respective cutouts and holes If the stirrup 1 is made of a metal sheet or forged, a holding strap 15 is led through the cutouts 12, 12' which is folded under the cuff 4, 4' at each end The strap 15 prevents the flanges 3, 3' from spreading when an object or a bundle of objects P is tied or tightened with a strap binding according to the invention If the stirrup 1 is cast, then also a respective web known per se and not shown is cast which connects both flanges 3, 3' thus making the strap 15 superfluous The strap binding according to the invention is fixed to an object P as follows (see Fig 2) First, a strap 15 is led through the cutouts 12, 12', the ends of which are folded inwards along the cuffs 4, 4' The screw 6 is screwed into the nut om 5 to such depth that only a small portion of it projects out of the om Through the cutouts 8, 8' in each flange 3, 3' the binding strap 9 is led, the first end of which is folded through the cutout 12' (Fig 2), e g , inside the stirrup 1 The opposite, free end of the strap 9 is now led around the object P and pushed again through the cutouts 8, 8', this time from the opposite side The free end of the strap 9 is kept tight either by hand or a suitable tool while the screw 6 is screwed until it rests with its screw-end against the superposed layers of the strap 9 When tightening the screw 6, the strap 9, in the area of acting of the screw-end of the screw 6, moves towards the object P thus being more and more tightened When the force exerted by the screw-end of the screw 6 onto the strap 9 reaches a sufficient limit, the screw-end 6, according to the principle of deep drawing, essentially penetrates into the superposed layers of the strap 9 thus creating a tensionally and form-locking connection which offers good holding of the strap 9

Claims: Claims: A strap binding for tensional strapping of objects, for instance bars, rods and similar, whereby said strap binding comprises a rigid stirrup and a binding strap extending therethrough, the latter enclosing an object to be strapped whereby the binding strap is retained against falling out by means of a fixing screw tensionally and in a form-locking way, characterised in that it compπses - a stirrup (1) formed as an elongated channel shaped in a cross-section essentially as a letter U and composing a web (2) and flanges 3, 3' standing approximately perpendicularly thereto having at each free end cuffs (4, 4') arranged approximately perpendicularly thereto, whereby said web (2) being preferably formed centocally to its longitudinal and transversal axes with a nut πm (5) arranged perpendicularly thereto so that each flange (3, 3') in the area of the nut om (5) is formed with a preferably rectangular cutout (8, 8') extending from the web (2) towards the cuff (4, 4') up to approximately half the length of each flange, that in the transition area of each flange (3, 3') into the cuff (4, 4') and preferably centocally to the web (2) and coaxially with a screw (6) preferably a rectangular cutout (12, 12') is formed, and that each cuff (4, 4'), in its lower om area and axially with the screw (6) below the cutout (12, 12'), is formed with a step (13, 13') extending from the edge of the cuff (4, 4') towards the cutout (12, 12'), - a holding or tightening screw (6) screwed into the nut om (5) and composing at its first end a suitably shaped screw-end and comprising at its opposite end a suitably shaped holding portion that is subjected to the application purpose, and - a primary binding strap (9) led through the cutouts (8, 8') and around an object (P) is to be tied The strap binding according to claim 1, characterised in that each flange (3, 3') is formed with at least two through-holes (10, 11) extending perpendicularly thereto which are preferably arranged symmetrically to the longitudinal axis of the screw (6) and are intended for the screws for fixing another beam or auxiliary means The strap binding according to claim 1 or 2, characterised in that a force exerted onto the strap (9) via screw-end of the screw (6) causes that, according to the principle of the deep drawing, the screw-end essentially penetrates into the superposed layers of the strap (9) thus creating a tensional and form-locking connection and ensuring good holding of said strap. 4. The strap binding according to any of the preceding claims, characterised in that each cuff (4, 4') is formed with a pair of rectangular cutouts (14, 14') being distant from the center-line of the screw (6) and intended to receive secondary, i.e. auxiliary, fixing or binding straps, respectively. 5. The strap binding according to any of the preceding claims, characterised in that a holding strap (15) is led through cutouts (12, 12') the ends of which are folded inwards along the cuffs (4, 4'). 6. The strap binding according to any of the preceding claims, characterised in that a web is arranged between the flanges (3, 3'), said web being integral with said flanges. 7. The strap binding according to any of the preceding claims, characterised in that the nut rim (5) is formed as a nut welded to the web (2). 8. The strap binding according to any of the preceding claims, characterised in that the screw (6) is an eye bolt, a lifting eye bolt, an eyelet bolt or similar. 9. The strap binding according to any of the preceding claims, characterised in that the screw-end of the screw (6) has a shape of a chamfered end, a truncated cone point or similar.

Inventors: VOJVODA DRAGO, VOJVODA, DRAGO
Applicants: VOJVODA DRAGO, VOJVODA, DRAGO
Application year: 1997
Main classification: B65D63
IPC codes: B65D63, F16B1, F16L3