Technical Field The present invention relates to a device for the detachable securing of a cloth or the like to a boom, roller or the like, which is mainly formed from a base profile and a complementary part, arranged in connec¬ tion v/ith two free longitudinal edges of the base pro- file.

Background Art

There is often a need to secure a cloth or similar flexible member detachably to a boom, roller or the like. For example, a sail may have to be secured to a boom, a mangle cloth secured to a mangle roller or beam, a Venetian blind secured to a roller to form a roller blind or an openable side in a brewer's dray etc.

In every case it is desired to achieve a secure but easily detachable fastening, without the sectional shape of the boom or roller being disturbed to an ap¬ preciable extent.

An earlier known device of this kind consists of a strip which is secured (for example by screwing) in a recess in a roller while clamping a cloth. Another known device is that which is used for the booms of sailing boats, namely a row of runners fixed to the sail which is introduced into a rail at the upper edge of the boo .

In the Swedish patent specification 78088674-1 a cover locking device for a lorry is shown, consisting of a base profile (a flap profile) , a joint profile and a lock profile with suitably placed joints between them, so that a cover can be firmly locked between the lock profile and the flap profile by a snap locking effect.

The Invention

It has now been found that the same general idea can be utilized for the purpose of attaining a devic of the kind indicated in the introduction. Thus the device according to the invention is characterized by a joint profile which is articulately secured, b a first joint, to the first of the free edges of the base profile, and a lock profile, which is articulately secured, b a second joint, to the joint profile and at its othe free end is designed so as to be able to be brought to engagement with the base profile at its correspon ingly shaped second edge, while gripping the cloth, wherein the combined heights of the joint profil and the lock profile insignificantly exceed the spac between the first joint and the second edge of the b profile with the cloth gripped and wherein, thanks t the inherent springing of the profiles, the second joint, with the cloth gripped, can be caused to snap over the line between the first joint and said secon edge and wherein the complementary part consists of a extension, serving as a handle member, backwards and downwards of the lock profile and in the locking pos tion overlappingly bears against the base profile a its first edge.

Thus the base profile forms the main part of the cross-section of the boom or roller v/hile the rest o the cross-sectionconsists of the handle member.

The base profile is hollow so as to be able to receive and store the cloth in itself. Brief Description of Drawings

The invention will be described in more detail below v/ith reference to the accompanying drawings in

which Figures 1 and 2 show, in cross-section, two em¬ bodiments of a device according to the invention. Preferred Embodiments of the Invention

Fig 1 shows the boom of a sailing boat in cross- section. A base ^' profile 1, like all the other profiles described below, is preferably made of aluminium. By means of a first joint 2 a joint profile 3 is articu¬ lately secured to the base profile 1, whereas a lock profile 5 is articulately secured to the joint profile 3 by means of a second joint 4.

The upper end of the lock profile 5 may appropri¬ ately be shaped so as to form, together with an end por¬ tion of the base profile 1, a third joint 6 in which a sailcloth 7 can be gripped. A handle member 8 constitutes an extention back¬ wards and downwards of the lock profile 5 and is used to manipulate this and thus the whole securing device. In the locking position of the device as shown the handle member 8 also forms a portion completing the base pro- file 1 to provide a whole boom profile.

During the manoeuvering of the device into the locking position, the second joint 4 snaps over the con¬ necting line between the first joint 2 and the third joint 6, and the handle member comes to bear against the base profile 1 (below the first joint 2) .

Note that the base profile 1 has a recess at the end of the handle member 8 so as to render possible a grasp of the handle member for manipulation.

An important advantage of this arrangement is that the sail can easily be taken in if necessary by releas¬ ing the securing device, feeding in a certain amount of the sail into the boom and fastening the sail again. The boom construction is here considerably simpler and cheaper than the usual one, since the boom-turning mechanism, otherwise necessary, is eliminated and the sail is also simpler because of the absence of runners.

The boom can be dimensioned so as to receive the whole sail in its interior, which is a further ad¬ vantage.

Fig ^' 2 shows a corresponding design for a roller with a circular cross-section. Corresponding parts h the same reference numerals as in Fig 1 with the add tion of the number "1". The device therefore consist of the following parts: a base profile 11, a first joint 12, a joint profile 13, a second joint 14, a l profile 15, a third joint 16, a cloth 17 or the like and a handle member 18, which together with the base profile 11 forms the circular cross-section.

As stated, the parts (the profiles) may be made aluminium with a certain inherent resilience, but ot materials are conceivable, for example plastics. Con structional differences in comparison with what is shown and described are possible, for example so far the formation of the joints is concerned. The length the profiles may vary within wide limits.