DE1557399A1 - Clamping device for stiffening flexible surfaces - Google Patents

Description

Patent application

of the company

POLLUX (Soeiete a Responsabilite Limitee), 30 Boulevard de

Port Royal, Paris, France

"Clamping device for stiffening flexible surfaces ¹ '

If it is necessary to stretch a flexible surface such as a cloth, leather, plastic sheet or the like to stiffen odar, which itself has no inherent stiffness, one or more rigid tensioning elements are used, which are designed to give the surface its form of use. One end of the tensioner is at an appropriate point attached to the surface to be stiffened and the other end can either be tightened in the same way at a different point Surface can be attached, as is the case with tents, which can be dismantled Filling walls and projection screens is the case, · or it can be on gain hold on a baseline where the flexible surface already has a fastening point. This is the case with awnings, box canopies of caravans, canopies, collapsible boats

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and in the same way with camping tents. This attachment to the flexible surface can be done either directly or through the interposition of a rigid element that is connected to this is positively connected. This tensioning element can take on a myriad of forms, it can be bars, rods, Struts, struts, masts, ridge poles, or even a pegged one Be bars.

Except for the case where this tensioning element has a certain flexibility and the flexible surface like a bowstring tensioned, the rigid tensioning element must have a precisely limited length to the desired tension of the surface to be stiffened to obtain. Very often the setting up and the preparing Attachment of such a tensioning element Difficulties that cannot be accepted if they are frequent Assemblies and disassemblies. To make it easier to position, it has been suggested to increase the length of the rigid To change the clamping element by, for example, a movable Part can slide in a link guide, which after its attachment to the clamping element of the necessary length is equivalent to. The moving part can be fixed by known means, such as screws, wedges, eccentric levers or spindles, a pawl, a toothed rack, etc. In this case, however, the locking can only be a few, precisely limited Have distances that correspond, for example, to the hole spacing of the pawl or the tooth pitch of the rack. This Distance, however small it may be, can be that of the

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endanger the safe voltage.

In order to avoid this disadvantage, it has been proposed to have a support member at each end of a tubular body to be slidably attached, which is intended "either with a .the edges ^ of the surface to be clamped or with a fixed point in To come connection, one of these carriers in position to the corresponding outer end of the tubular body is adjustable, while the second moves against an elastic organ that moves against one of the tubular body

supported by a worn stop.

After the distance between the fastening elements has been approximately established and one of the fastening elements with one of the fastening points was connected, it is therefore sufficient for the user to slide the support of the second organ, which compressing the elastic organ, and then bringing it into connection with the corresponding fastening point. In order to the flexible surface remains taut despite the forces exerted on it, in particular by gusts of wind, but must intermediate elastic organ must be relatively strong and offer a sufficiently high resistance. The squeezing this organ by shifting the support of the fastening organ "opposite the tubular body therefore requires significant manual force, which is all the more difficult to apply is when these clamping elements often take positions that

make more difficult. As a result, in the -Γ9337 / 0157 _{BAD 0R | GINAL} _ ^ _

Practice creates a compromise and that the elastic member, which is generally formed by a spring, has a drag force which is insufficient to ensure adequate stiffening.

The flexible surface tensioning device according to the invention avoids this disadvantage.

This clamping device, which is composed of a tubular body and two supporting organs, one of which is opposite slidably disposed at one end of the tubular body and provided with means for adjusting the distance which it separates from the end, while the other support member can move coaxially with respect to the other end against an elastic member is, is characterized in that a translation device switched between the two support members and such is designed that the compression of a relatively strong elastic organ can be effected by hand.

Thanks to this training, it is possible for the user, despite different positions of the tensioning organs without fatigue to compress the powerful spring used so far to either to bring about adequate stiffening of the flexible surface or to bring the supporting organs so close that they let yourself be brought into position and then effect the stiffening by relaxing the spring.

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The invention is illustrated by the drawing: on the basis of exemplary embodiments explained in more detail. Show it

1 to 5 show a first embodiment of the invention in. Cut and

FIGS. 4-6 show another exemplary embodiment in a view and in a partial cut.

The clamping device shown in FIGS. 1 to 3 consists of two parts 1 a and 1 b of a tubular body, which are connected to one another by the hinge tabs 5 a and 5 h of a double joint 8. In the part 1a, the carrier 2 of a support member 7a is slidably guided that has the shape of a pin which is intended for _f , z. B. to engage in an eyelet. The carrier is provided with a series of transverse holes, which holes in the .Rohrteil 1a correspond to a length adjustment with the help of a. Dornes3 make _: to be able to. In the pipe part 1b, the carrier 6 of a support member 7b is arranged in the form of a fork, which is brought into connection with a bracket, firmly connected to the flexible surface. The outer end of the carrier 6 braces itself against a spring 10 which. is in turn supported against one inner stop 16. Each of the supporting organs can have any one or the other shown design ... A, Muff e JXi which with .rich., Friction on; the tubular parts la and 1b ^{1 is} slidably arranged, enables these tubular To hold parts in such a way that one part

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education of the other. . BAD GRiQiNAL

■ ■■ ;. · ... ■■■ _ ■ · ■ -.... - 6 -

This configuration makes it possible, thanks to the double joint Fold to reduce the space required by the Spannvorricntung. About that in addition - and this is the main purpose of this embodiment - the two parts form a certain angle with one another, if each support member is connected to the corresponding attachment point ". If one clicks on the double joint 8 exerts a pressure, it is very easy to get information of the created lever arm by applying only a very small amount of force to the two Bring parts into their extended position towards one another and lock them together by placing the sleeve astride theirs facing ends pushes. The spring 10 is then strongly compressed and ensures sufficient stiffening the flexible surface.

In the embodiment illustrated in the Figures 4 to 6 embodiment of the carrier 2 of the supporting organ 7 ^a is provided with a number of transverse holes 4 and slides in a tubular body 1 having a plurality of holes 4-a to set the position of a mandrel 5 having . On the end 2a of the carrier 2, which protrudes over the other end of the tubular body 1, a tubular element Ic is slidably arranged, which carries the support member 7b at its outer end. Between the end 2a of the carrier and the end of the carrier of the fastening ^{element 7 D} , a coil spring 10 is connected. The tubular element 1c is connected at 15 by two rods or by a fork I3 to an attachment point 14 of a lever 11 which is attached to the tubular body 1 such that it can pivot about an axis 12.

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ORIGINAL BATHROOM - 7 -

When acting on the actuating lever 11 one generates without Effort to bring the two supporting organs closer together and compresses the spring, causing each of the support members in connection with the corresponding fastening point can bring. The lever is then left to its own devices and the spring expands, stiffening the flexible one Ensures area that can be assessed by the position of the operating lever.

To the space requirement of the clamping device during a period To reduce the tendency to bend, it is possible to separate the tubular body into two parts, which are joined by a double joint are connected to each other analogously to the previous one and by which one carries the support member 7 a in an adjustable manner, while the other is firmly connected to a rod 2a, the is enclosed by the tubular element 1c.

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Claims (1)

October 3, 66: st Pl 801 Claims 1. Clamping device especially for flexible surfaces, consisting of * a tubular body and two supporting organs, of which one opposite one end of the tubular body is slidably arranged and with means for regulating the Distance is provided which separates it from this, while the other support member is coaxial with respect to the other end is movable and is supported against an elastic member, characterized in that ane translation device (1a, 1b, 8 to 11, 12, 13) switched between the two supporting organs and is designed such that a relatively strong elastic member (10) compress by hand leaves. 2. Clamping device according to claim 1, characterized in that the tubular body is divided into two parts (1a, 1b) which are interconnected by a double joint (8, 5a; 5 * 0) and each of which slidably receives the carrier (2, 6) of a supporting member (7a, 7t>), the first carrier (2) is shackled in the axial direction and the second carrier (6) touches the end of an elastic member (10) which is '' is supported against a stop (16) carried by this, while a sleeve (9) with soft friction sliding on the ° - π 9 8 3 7/0 1 5 7 ■; -. ■; ■ i - 9 - - '.'. ■ -....- tae ^ jtgs two parts is arranged so as to be at the same time to be able to cover. 3 clamping device according to claim 2, characterized in that that the carrier (2) of the support member (7a) is adjustable in its position and penetrates the tubular body (1) and slidably receives a tubular element (1c) at its end, inside which an elastic organ (TO) is arranged and that at its other end the second support member (7b) carries, while the tubular element is supported by a pair of rods or by a fork (13) with an actuating lever (11) connected is,; which is pivotally mounted on a transverse axis (12) extending from the nearest end of the tubular Body is worn. 4. Clamping device according to claim 3, characterized in that that the tubular body (1) and the carrier (.2) of the adjustable Support organ in two, by a double joint with each other connected pipe parts and are divided into two support sections, one of which is slidably adjustable in the first pipe part arranged iat, while the other is firmly connected to the second pipe part. INSPECTED 909837/0 15 7 AO empty soap