WO2007036625A1

WO2007036625A1 - Device for deploying a swimming pool safety cover by unwinding and method for the use thereof

Info

Publication number: WO2007036625A1
Application number: PCT/FR2006/002143
Authority: WO
Inventors: Bruno Barbet
Original assignee: S.A.S Etudema
Priority date: 2005-09-28
Filing date: 2006-09-19
Publication date: 2007-04-05
Also published as: FR2891291A1; FR2891291B1; EP1937914A1

Abstract

The invention relates to a device for deploying by unwinding the safety cover for a swimming pool and to a method for the use thereof. The inventive device comprises a movable collapsible structure (7) carrying a roll (4) on which the safety cover (3) is wound and which is movable from one swimming pool (1) side to the other at a determined height with respect to the swimming pool edges and flatly foldable on the ground after being transferred to the other swimming pool (1) side in such a way that the roll (4) can be placed on the ground and the cover is enabled to entirely cover the swimming pool. Said invention can be used for swimming pools.

Description

"Device for depositing a safety cover of a swimming pool and the method of implementation".

The present invention relates to a device for depositing unwinding a security cover on the edges of a pool including a pool. It also relates to a procedure for depositing by unfolding a security cover on the edges of the basin, and a method for winding the security cover from its covering position of the basin. There is known a device for ensuring the safety of a swimming pool in order to prevent drowning of persons, including children, and comprising a 'blanket or tarpaulin equipped with metal cross bars usually anodized aluminum spaced the each other a fixed distance, for example 1.50 m, and rest at their ends on the edges or the edges of the pool in the unwound position of the tarpaulin. The latter is also equipped with a crank manually operable for the winding of the tarpaulin and a return strap for unrolling the tarpaulin to its fully closed position of the opening of the pool of the pool. However, these safety blankets have the disadvantage that they are not easy ^'to use because they often require the presence of two persons to ensure the course and winding the safety cover and positioning crossbars to rest on the edges or edges of the pool. These bars are unsightly and the whole cover and bars can be difficult to move away from the pool especially when the latter is large. Besides this known system is relatively expensive, the winding of the security cover is time consuming and tedious for the person who must handle it at ground level. Finally, for large pools, it is necessary to provide a motorized assembly for 1 'winding of the safety cover due to its large weight.

The present invention aims to eliminate the above disadvantages of swimming pool safety devices by providing a device for depositing by unfolding a safety cover on the edges of a pool, including a pool, and which is characterized in that it comprises a roll on which the tarpaulin is wound and a foldable rolling structure occupying a standing position for rotatably supporting both ends of the roll at a given height relative to the edges of the basin and movable from one end at the other end of the basin in a direction substantially parallel to the longitudinal direction of the basin with the roller occupying a position substantially transverse to this direction, the free end side of the sheet being hooked to the ground by hooking means situated at near the corresponding end of the basin, so as to unroll the safety sheet on the edges of the and in that the rolling structure is folded flat on the ground once brought to the other end of the basin to put the roller on the ground and allow the cover to completely cover the opening of the basin. Preferably, the tarpaulin has its end side opposite to that which can be hooked to the ground integral with the roller and comprises a flexible traction device cable extending along the two lateral sides of the tarpaulin and its free end side and being able to be extended the log of the edges of the basin as the displacement of the rolling structure towards the opposite end of the basin.

The attachment means of the free end side of the sheet comprise two horizontal pulleys solid with the ground near the corresponding end of the basin being spaced transversely from one another and around which the portions of the cable located at the two free corners of the sheet are hung before moving the rolling structure towards the opposite end of the basin.

The cable comprises two free ends protruding from each lateral side of the sheet near the roller and two tensioning means anchored to the ground by anchor bolts can be hooked respectively to the two free ends of the cable when the sheet is in its covering position the basin opening so as to tension the boundary wire along the edges of the basin to a tension value preventing it from being manually raised.

Preferably, the roll support structure of the roller comprises at each end of this roller two feet mounted pivoting at one of their ends around the corresponding end of the roller and two wheels carried by the opposite ends of the two feet which can occupy a standing position forming a roller support triangle or a flattened position to which the two feet are substantially in the same horizontal plane extending on either side of the roller perpendicular to the latter.

The two legs of the support of one end of the roll are held in their upright position by a lever pivoted at one of its ends to one of the feet and can be hooked at its opposite end to the other foot.

The device advantageously comprises a strap whose one end is fixed to the roller in the center of the latter and initially wound around the sheet when it itself wound around the roller and can be manually gripped at its free end by a person to allow rotation of the roll and the unwinding of the sheet by traction exerted on the strap also causing the displacement of the rolling structure. Each tensioning means is a ratchet which can be stowed at the end of a strap attached at its other end to the end of the cable end and which can be maneuvered manually to stretch the cable. The boundary wire is preferably housed in a peripheral hem of the sheet.

At least one strap has one end secured to the roller and the opposite end can be secured, after unwinding of the tarpaulin, to an anchor bolt via a tensioning means.

The roller comprises at least one of its ends a crank manually operable by a person to allow the winding of the tarpaulin around the roller to the upright position of the rolling structure as the latter is moved. along the lateral edges of the basin until reaching the opposite end of the basin, to which the opening of the latter is completely cleared.

Alternatively, a motorized assembly is removably attached to one end of the roller and can be controlled to allow winding of the tarpaulin around the roller to the upright position of the rolling structure as it is moved. last along the lateral edges of the basin until reaching the opposite end of the basin at which the opening of the latter is completely cleared.

The device may also be provided with two hooking means spaced in the form of hook or stud mounted on the ground in a direction parallel to the end edge of the basin where the two pulleys are located and allow to hang the part of the cable along the free end side of the sheet and the tensioned side portions of the cable are attached to pitons secured to the ground near the side edges of the basin. The covering and the opening of the basin are rectangular.

According to an alternative embodiment, the anchoring means of the free end side of the sheet comprise two pulleys integral with a clevis of a part of the support fixed to each corner of the sheet, the part of the support comprising a plate of binding of the clevis to eye in which can be anchored a peak of the ground.

Advantageously, each stud is anchored to the ground by means of a bushing fixed in the ground and in which the stud can be moved between a rest position resting on the ground and an anchoring position leaving the bushing while remaining integral with the latter, the pin can be removed from this socket by unscrewing.

The invention also relates to a method for depositing unwinding a security cover on the edges of a pool, including a pool, using the device as defined above and which is characterized in that it consists in positioning the rolling structure relative to an end edge of the basin so that the roller is disposed substantially transversely to the longitudinal direction of the basin, unwind a free end portion of the sheet and hang it in the vicinity of its two corners to anchoring means on the ground, manually grip the strap wrapped around the sheet and the roll, exert a traction on it by a person located at the opposite end edge of the basin to unroll the sheet as and when move the wheel structure under the pull of the strap, fold flat on the ground the wheel structure and the roller when it is near this opposite edge of so that the cover completely covers the opening of the basin and the cable is resting on the other edges of the basin, securing the two tensioning means on the one hand to anchor bolts on the ground and on the other hand to both free ends of the cable, and operate the tensioning means to stretch the cable on the edges of the basin.

The method also consists after the cable is supported on the edges of the basin, to secure at least one strap secured to the roller to an anchor pin on the ground by means of a tensioning means so as to tension the sheet.

The invention also relates to a method for winding up a safety cover that tightly covers the opening of a pool, in particular a pool, and using the device as previously described, and which is characterized in that it consists in relaxing at least the tension strap of the tarpaulin and the tensioning straps of the cables using the tensioning means, detach the straps secured to the ends of the cable and the strap of the tensioning means, lift the rolling structure with the roller in its standing service position, operate the roller in the winding direction of the tarpaulin as the rolling structure is moved towards the opposite end edge of the basin, disengaging the two corners of the tarpaulin means anchoring to the ground when the rolling structure is near the edge of the basin, completely wind the tarpaulin around the roller and move the rolling structure to a location away from the ba ssin.

The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the following explanatory description made with reference to the accompanying drawings given solely by way of example illustrating a mode of operation. embodiment of the invention and in which: Figure 1 is a perspective view of the device of the invention positioned at one end of a pool of a pool for the unwinding of the safety cover;

- Figure 2 is a view similar to that of Figure 1 and showing the grounding of the free end of the safety cover before unwinding thereof; FIG. 3 shows the displacement of the rolling structure of the device of the invention for the unwinding of the safety cover;

- Figure 4 shows the rolling structure at the opposite end of the pool basin, in a standing position; Figure 5 shows the rolling structure folded flat on the ground;

- Figure 6 is a view similar to that of Figure 5 and showing the tensioning means of the tension cable of the security cover; Figure 7 is a perspective view showing the safety cover at its extended position of covering the pool of the pool; 8 shows in perspective the rolling structure of the device of the invention in the process of winding the security cover; FIG. 9 is a perspective view of the rolling structure and roller assembly of the device of the invention in a standing position;

- Figure 10 shows the assembly of Figure 9 in the folded position flat; FIG. 11 is an enlarged perspective view of the circled portion XI of FIG. 3;

- Figure 12 is enlarged sectional view along the line XII-XII of Figure 9;

Fig. 13 is an enlarged perspective view of the circled portion XIII of Fig. 6;

Figure 14 is an enlarged perspective view of the circled portion XIV of Figure 7; Figure 15 is an alternative embodiment anchoring the free end of the cable of the sheet to a tensioning means; - Figure 16 is a perspective view showing the connection of a support strap of the tarpaulin to the roller of the device of the invention for tensioning the tarpaulin;

- Figure 17 is an enlarged view of a peg hanging from the ground of a side edge of the tarpaulin; Figure 18 shows a tool for hanging the edge of the cover at the peak of Figure 17; FIG. 19 represents an alternative embodiment of the device of the invention;

FIG. 20 is an enlarged view of the circled portion XX of FIG. 19; and

- Figures 21 and 22 show in section an anchor bolt may be part of the device of the invention.

Referring to the figures, reference numeral 1 denotes a pool of a pool whose opening 2, in this case of rectangular shape, can be closed by a blanket or security sheet 3 to prevent drowning of persons, particularly children, in the absence of supervision.

The sheet 3 may be made of a material based on PVC resistant to breakage and may include a central grid for discharging water. According to the invention, the device allowing the safety sheet 3 to be deposited by unfolding along the edges B of the pond 1 of the swimming pool and to rewind the sheet 3 comprises a roll 4 on which the sheet 3 can be rolled up and constituted by an anodized aluminum tube closed at its two ends by two end pieces 5 concentrically fixed in the roll 4 by a plurality of radial screws 6, each end 5 having an end shoulder 5a retaining the corresponding edge of the sheet wound around the roll 4 The device further comprises a rolling structure 7 rotatably supporting both ends of the roll 4, the rolling structure 7 being foldable and able to occupy a standing rolling position to support the roller 4 at a certain height above the B edges of the basin or a flattened position on the ground as will be seen below. For this purpose, the rolling structure 7 comprises at each roll end 4 two feet 8 pivotally mounted at one of their ends around the corresponding end of the roll 4 coaxially with its longitudinal axis and two wheels 9 carried respectively by the two. opposite ends of the two feet 8. As best shown in Figure 9, the two support legs 8 of each end of the roll 4 can occupy a standing position forming a support triangle of the roller 4 located approximately in a vertical plane perpendicular to the longitudinal axis of the roll 4 or a flattened position on the ground better visible in Figure 10 to which the two legs 8 are located substantially in the same horizontal plane extending on either side of the roll 4 perpendicular to the latter.

The two supporting feet 8 of one end of the roll 4 are held in their upright position by a lever 10, one end of which is pivotally mounted to one of the legs 8 and its opposite end is manually hooked to the other foot 8 of in such a way as to prevent the two feet from being moved towards or away from each other by pivoting about the longitudinal axis of the roll 4.

The roller 4 may be rotated about its longitudinal axis, in the upright position of the rolling structure 7, by a hand-operated crank 11 which is located at one end of the roller, a second identical crank may also be provided at the other end of this roller to allow a person to wind the sheet 3 around the roller 4 being located at one or the other end of the rolling structure 7. FIG. 12 shows an embodiment of rotationally driving the roller 4 by cranking. Thus, a rigid cylindrical axis 12 is fixed to each endpiece 5 of the roll 4 coaxially with the latter by an internal central screw 13 so that the axis protrudes outside the nozzle 5 and the opposite end of the cylindrical axis 12 is coupled to the crank 11. The axis 12 is rotatably mounted in the two cylindrical ends side by side 8a respectively of the two pivoting feet 8 through bearings 14, each cylindrical end 8a of a foot 8 being pivotable about the cylindrical axis 12 by an internal bearing 15.

The sheet 3 is secured by one of its ends of the roll 4 being, for example, engaged in a longitudinal slot of the roll and fixed therein by any suitable means.

The sheet 3 comprises a flexible traction device 16, metal or synthetic material, housed in a peripheral hem 3a of the sheet 3 so that the cable 16 extends along the two parallel lateral sides of the sheet 3 and the side transverse end of the latter opposite that fixed to the roller 4. Thus, the cable 16 is configured in a substantially U-shaped whose two free ends project from the hem 16 on the same side adjacent to the roller 4 As best shown in Figure 13, each free end of the cable 16 coming out of the hem 3a is secured to a tip 17 which is fixed a loop of a rigid flexible strap 18, the opposite end may be attached to a tensioning means 19 manually operable, preferably ratchet, known per se, and which can be anchored removably to the ground at an anchor bolt 20 which, in the off position, can be retracted into the ground without fail protruding from it, come to bear on the ground having an outer surface bulging non-aggressive or, if necessary, removed from the ground so as not to hurt a person's foot.

The end piece 17 can be fixed to the corresponding end of the cable 16 by one or more screws 21 passing through the end piece 17 and blocking the end of the cable 7 in a hole in the endpiece 17.

Each tensioning means 19 can be manually operated to tension the cable 16 as will be seen later. FIG. 11 shows that each of the two corners of the cover 3 on its free end side is cut substantially at right angles so as not to have a hem and expose the corresponding arcuate portion of the connecting cable 16 between the longitudinal portion of this cable and its transverse portion to allow the attachment of each of these arcuate portions of the cable 16 around a pulley 21 fixed horizontally to the ground so as to rotate about a vertical axis. The two pulleys 21 are arranged spaced in the same direction parallel to the corresponding transverse end edge of the basin 1 at a distance from this edge. In addition, each of the two pulleys 21 is located in a direction parallel to the corresponding longitudinal edge of the basin at a distance from this edge.

A return strap 22 is secured by one of its ends to the outer surface of the roll 4 substantially in the middle of the latter so as to be able to wrap around the sheet 3 during the winding of the latter around the roll. 4 and, in the fully wound position of the sheet 3 around the roller, the strap 22 has a length such that it can be grasped at its free end by a person located near the edge of the pool 1 of the pool opposite the one where is the assembly with rolling structure 7 in a standing position and roll 4 around which is wound the cover 3, so that the person can exercise traction on the strap 22 allowing both a rotation of the roller 4 for the unwinding of the sheet 3 and the displacement of the rolling structure 7 in a direction substantially parallel to the longitudinal direction of the opening 2 of the basin 1 to this person.

The transverse end of the free end of the sheet 3 can also be anchored to the ground near the corresponding transverse edge of the basin 1 by two hooks 23, only one of which is visible in FIG. 14. The two hooks 23 are spaced apart from one another. another in the same direction between the two pulleys 21 and, preferably, are arranged systematically relative to the longitudinal axis of the opening 2 of the basin 1. Each hook 23 is integral with a sole 24 retained on the ground by a bolt vertical anchoring 25 through a longitudinal slot 26 of the sole 24 to allow movement of the sole 24 relative to the stud 25 when the hook 23 is introduced through a corresponding hole in the cover 3 so that the part corresponding cable 16 is retained by the hook 23.

Two straps 27 can be stretched from one end to the other of the pelvis in a longitudinal direction parallel to its opening 2 before unwinding the cover 3 in order to support the latter once completely unwound at its closed position of the opening 2 of the pelvis 1. Each strap 27 can be anchored to an anchor stud at one of its ends near one of the edges B of the basin 1 and stretched at its opposite end by a tensioning means located near the opposite edge of this basin. Advantageously, the end of each support strap 27 can be anchored at its opposite end to the tensioning means to one of the hooks 23, as shown in FIG.

According to an alternative embodiment, each winding crank 11 of the bar 3 can be replaced by a autonomous power unit powered by a battery, removably attached to one end of the roller 4 and can be controlled to automatically wind the sheet 3 as the rolling structure 7 moves from one end to the other of the basin 1.

The method for depositing the safety cover by unwinding on the B edges of the basin 1 is already apparent from the foregoing description and will now be explained. A person moves the standing wheel structure assembly 7 and roller 4 around which is completely wound the sheet 3 near the edge B of the basin 1 where the two pulleys 21 are located by arranging the roll 4 so that it is disposed substantially transversely to the longitudinal axis of the basin.

The person then grasps the free end side of the sheet 3 to partially unroll it and hook the two arcuate portions of the cable 16 respectively to the two pulleys 21. The person also hooks the transverse end side of the sheet 3 to the two hooks 23.

Then, the person grasps the free end of the strap 22 and moves to the opposite edge of the basin 1 to exert traction on the strap 22 which causes both a rotation of the roller 4 to ensure the unwinding of the sheet 3 and the moving the rolling structure 7 in a direction substantially parallel to the longitudinal axis of the basin along its two side edges B to the opposite edge where the person is. Thus, the sheet 3 is held by its transverse end free end on the ground by the pulleys 21 and the hooks 23 and deposited on the two side edges of the basin 1 as the rolling structure 7 moves. rolling structure 7 arrives at a location near the opposite edge B of the basin 1, as shown in Figure 4, the person releases both levers 10 respectively of the two pairs of feet 8 to lay flat on the ground the feet 8 as shown in Figure 5 which shows that the roller 4 extends on the ground parallel to the opposite edge of the basin 1 near the latter so that the cover 3 completely covers the opening 2 of this basin with the cable 16 disposed in abutment near the side edges and the transverse edge of the basin 1 opposite the roller 4. Then, the person grasps each of the straps 18 for the hooking to the tensioning means 19 previously anchored to the ground via the anchor bolt and actuates the tensioning means so that it exerts traction on the cable 16 at a determined voltage value such that the cable 16 is supported on the corresponding edges of the basin without it being lifted manually.

The tarpaulin is thus secured on an opening of the pond 1 of the pool being tensioned so that any person, regardless of its weight, can walk on the tarpaulin 3 without risk of major depression of the this.

To wind the sheet 3 again around the roller 4 to use the pool, the person first actuates the two tensioning means 19 to release the traction exerted on the cable 16, removes the straps 18 of the tensioning means 19 and raises the roller 4 at each of its ends so as to bring each pair of legs 8 to its upright position to which it is held by hooking the corresponding lever 10 so that the rolling structure 7 is again in its upright position.

The person then moves the rolling structure 10 towards the opposite edge of the basin 1 by operating the crank 11 so as to wind the sheet 3.3 around the roller 4 as the rolling structure 7 moves, the strap 22 is also wrapping around the tarpaulin 3. Once the rolling structure 7 has arrived in the vicinity of the opposite edge of the basin 1, the person releases the free end side of the sheet 3 of the two pulleys 21 and two hooks 23 to allow it to completely wind the sheet 3 around the roller 4 by operating the crank 11 and the rolling structure 10 is then placed at a location remote from the pool.

FIG. 15 shows an alternative embodiment of the attachment of each end piece 17 of the cable 16 to a strap 18 that can be tensioned by the tensioning means 19.

According to this embodiment, the strap 18 is no longer secured to the end piece 17 of the cable 16 and has at its free end a metal piece 28 into which the crimped end 17 of the cable 16 can be manually hooked. end of unwinding phase of the tarpaulin 3. Thus, the strap 18 is no longer permanently attached to the end of the corresponding cable 16 and remains on the ground during the winding phase of the sheet to be removed later to do not cause any discomfort once the cover is completely clear of the pool. Therefore, unlike the previous embodiment resulting in particular from Figure 13, there will be no need to undo the two straps of their respective tensioners for the winding of the sheet 3 around the roller 4 and it will simply be enough to disconnect the end pieces 17 of the cable 16 of the respective ends of the straps 18. Figure 16 shows an alternative embodiment by which the sheet 3 can be stretched using the two straps 27 supporting the sheet 3 during unwinding and winding.

According to this variant embodiment, the roll 4 comprises, integral with the latter, a means 29 to which the strap 27 can be hung when it is relaxed and that the roll 4 occupies its position resting on the at the end of the unwinding phase of the tarpaulin 3. The hooking means 29 can be constituted by a metal plate welded to the roll 4 and having two branches folded to one another by defining an axis lumen. transverse longitudinal to the longitudinal axis of the roller 4 and wherein can be manually introduced the strap through the space between the free ends vis-à-vis the two branches of the plate, the strap 27 having a ring 30 Rectangular generally connecting two portions of the strap 27 to one another and which abuts on the attachment means 29 when the strap 27 is stretched again.

When the cable 16 and the sheet 3 are stretched in the covering position of the opening of the basin 1, studs 31 anchored to the ground may be provided to also tension the two longitudinal sides of the cable 16 in a direction substantially perpendicular to the longitudinal axis of the opening of the basin 1 as shown in phantom in Figure 7. Figure 17 shows in detail one of the studs 31 anchored to the ground behind which is disposed the cable 16, an opening 3b of the base 3 being provided to ensure the passage of the curved end outwardly of the stud 31. Advantageously, the tensioning of the cable 16 to the pin 31 is made using the special tool 32 shown in Figure 18 which comprises an end 32a for hanging cable 16 to the pin 31 and an opposite end 32b for unhooking the cable 16 of this peak. Thus, when the cable 16 is in tensioned position parallel to the longitudinal edge of the basin 1 near each peak 31, the tool 32 is presented so that its flat end 32a is engaged under the cable and the pin 31 is engaged through the opening 32al of the end 32a. By operating the tool 32 by pivoting it up and down like a lever, the cable 16 is passed over the pin 31 and retained behind the latter after removal of the tool 32. For the stall of the cable 16 of the corresponding pin 31, simply insert the opposite end 32b of the tool 32 between the foot of the stud 31 and the cable 16 and disengage the cable 16 of the pin 31 by pivoting the lever arm constituted by the tool 32 in the direction passing the cable 16 over the pin 31.

The winding and unwinding process of the tarpaulin 3 differs somewhat from the previously described method, considering the variant embodiments of FIGS. 15 to 18.

Thus, the method of unfolding the sheet 3, once the roller 4 has been placed on the ground near the corresponding transverse edge of the basin 1 with the cover 3 completely covering the opening 2 of this basin, continues so each of the end pieces 17 of the cable 16 is manually introduced into the part 28 of the strap 18 which is tensioned by actuation of the tensioning means 19 to tension the cable 16 to its desired tension.

Then, each of the straps 27 for supporting the sheet 3 is expanded by actuation of the tensioning means 32 to give slack to the strap and allow it to attach to the roll 4 by introducing the strap into the attachment means 29 and the tensioning means 32 is again actuated to tighten the strap 27 until the ring 30 bears on the attachment means 29, which causes the displacement of the roller 4 in a direction to tension the tarpaulin 3 whose end free is secured to the roll 4.

Finally, the two longitudinal portions of the cable 16 are hooked to the respective anchor bolts 31 in the manner shown in phantom in FIG. 7. The operation of winding the sheet 3 to the roller 4 is carried out by unhooking everything. firstly the longitudinal parts of the cable 16 of the studs 31 with the aid of the tool 32, by relaxing the straps 27 to relax the cover 3 and unhooking each strap 27 of the attachment means 29 of the roll 4, the straps 27 of the support of the sheet then being strained again. The tensioning straps 18 of the cable 16 are then relaxed, the ends 17 of the cable 16 are unhooked from the end pieces 28 of the straps 18, then the winding procedure continues as already described above.

According to the embodiment shown in Figures 19 and 20, the pulleys 21 for hooking the sheet 3, instead of being integral with the ground, are secured to the two corners of the sheet 3 with the traction cable 16 pre-wound on the pulleys 21. As shown in FIG. 20, two pulleys 21 are secured to a support piece 33 generally in the form of a yoke so as to be arranged in the same plane between the branches of the yoke in order to be able to turn about two axes respectively 34 crossing the two branches of the screed perpendicular to them. The two branches of the yoke have their connecting soul secured to a rigid plate 35 transverse to the core and having a central eye 36 for anchoring the part of the support 33 to a pin anchored to the ground. The part of the support 33 is fixed under the corner of the sheet 3 by a strap 37 passing through the eye 36 and whose ends are disposed beyond the clevis of the part 33 respectively on the outer and inner faces of the corner of the the tarpaulin being secured to the tarpaulin by a transverse rivet 38. This embodiment avoids the presence of pulleys anchored to the ground can injure people.

FIG. 19 also shows the presence of two straps 39 of relatively short lengths secured to one of their ends of the roll 4 and whose opposite ends can be anchored to ground anchor bolts 40. The two straps 39, after unwinding of the tarpaulin, can be tensioned after hooking to the studs 40 by tensioning means 41 of in order to participate in the tension of the deployed tarpaulin 3. The two straps 39 are attached to two anchoring points of the roller 4 located symmetrically to the transverse median plane of this roller. The two straps 39 are used in place of the previously described straps 27 to perform the same function as the latter.

Finally, FIG. 19 shows that the transverse portion of the cable 16 located between the two rigid plate wedges 35 of the tarpaulin 3 is hooked to two ground anchor bolts 23a performing the same function as the two hooks 23 previously described.

FIGS. 21 and 22 show a preferred embodiment of each of the various pitons described above, such as, for example, the bolt 40. The bolt 40 comprises a metallic cylindrical rod 41 having a head 42 in the shape of a spherical cap at one of its ends. The opposite end 43 of the rod 41 is threaded over a portion of relatively small determined length and the rod 41 comprises a portion 44 of smaller diameter between the threaded portion 43 and the remainder of the rod 41.

The stud 40 may be anchored in a metal sleeve 45 permanently anchored in the ground S, either by a press fitting into a hole 46 made in the ground, or simply by embedding the sleeve 45 in the concrete, the sleeve 45 being able to be provided with external annular grooves, not shown, between which is embedded the concrete to prevent extraction of the sleeve 45 of the ground S. The sleeve 45 is provided in the vicinity of its lower end of an inner annular portion 47 forming a fixed ring the bushing 45 is internally threaded. Where appropriate, the lower free end _. open of the sleeve 45 may be closed by an attached plug 48 of a plastic material.

The mounting of the bolt 40 in the sleeve 45 is as follows. The bolt 40 is introduced so that its threaded end 43 bears against the inner ring 47, then the bolt 40 is rotated clockwise so as to engage the threaded end 43 in the ring 47 until it reaches its end. this end 43 completely disengages from the ring 47 to allow the pin 40 to fall freely into the bushing 45 in the position shown in Figure 22 to which the head 42 is supported on the ground. To hook one of the elements of the device of the invention, such as for example the cover 3, the user grasps the head 42 from the position of FIG. 22 to pull it upwards until the lower end 23 comes into abutment under the ring 47 of the sleeve 45, thus preventing the extraction of the stud 40 in the socket and allowing the anchoring of the corresponding element of the device of the invention. In case of non-use of a pin 40, it can be removed from the ground by pulling it upwards until the lower threaded portion 43 comes to bear under the ring 47 and turning the pin 40 in the direction counterclockwise so as to disengage the portion 43 of the ring 47 by unscrewing beyond this ring. In this way, there is more risk of injury to anyone especially as the sleeve 45 is anchored in the ground flush with it.

The device of the invention has the following numerous advantages:

it has an aesthetic appearance relative to the device of the prior art using transverse bars and intermediate fasteners,

- The leaves and other debris can not enter the basin because the periphery of the sheet 3 is flush with the ground by the extremely tight cable supported on it; the tarpaulin, in the safety position, maintains the temperature of the pool at a relatively constant temperature;

- It can be easily used, especially for the winding of the tarpaulin since being at height of man;

- It has a small footprint once placed on the ground to cover the basin; the roller 4, in addition to exercising its function of winding and unwinding of the sheet 3, contributes to the intrusion safety, especially of children, in the basin being flush with the ground as the tension cable of The tarpaulin; the tarpaulin can be rolled up and unrolled very quickly and, during the winding of the tarpaulin, the leaves and other external detritus remain under the tarpaulin and therefore can not pollute the water of the pond;

- The environment around the pool is not deteriorated since it has only two anchor pulleys and a relatively limited number of retractable pitons that can go from 8 to 16 pitons depending on the size of the pools, and

- it is aesthetic once the tarpaulin rolled up.

Claims

1. Device for depositing unwinding a safety sheet (3) on the edges (B) of a pool (1) including a pool, characterized in that it comprises a roller (4) on which is wound The tarpaulin

(3) and a folding folding structure (7) in a standing position for rotatably supporting both ends of the roll (4) at a given height relative to the edges (B) of the basin (1) and movable from one end to the other of the basin (1) in a direction substantially parallel to the longitudinal direction of the basin with the roller (4) occupying a position substantially transverse to this direction and the free end side of the sheet (3) hooked to the ground by hooking means (21,23) located near the corresponding end of the basin (1), so as to unroll the safety sheet (3) on the edges (B) of the basin (1) and in that that the rolling structure (7) is folded flat on the ground once brought to the other end of the basin (1) to put the roller (4) on the ground and allow the tarpaulin (3) to completely cover the opening (2) the basin (1).

2. Device according to claim 1, characterized in that the sheet (3) has its end side opposite to that which can be hung on the ground secured to the roller

(4) and comprises a flexible traction device cable (16) extending along both lateral sides of the sheet (3) and its free end side and extendable along the edges (B) of the basin (1). ) as the displacement of the rolling structure (7) to the opposite end of the basin (1).

3. Device according to claim 2, characterized in that the hooking means of the free end side of the sheet (3) comprises two horizontal pulleys (21) integral with the ground near the corresponding end of the basin (1). ) while being transversely spaced from each other and around which the portions of the cable (16) located at the two free corners of the sheet (3) are hung before moving the rolling structure (7) towards the opposite end of the basin .

4. Device according to claim 2, characterized in that the cable (16) has two free ends projecting from each side of the sheet (3) close to the roller (4) and in that two tensioning means (19) anchored on the ground by anchor bolts (20) can be hooked respectively to the two free ends of the cable (16) when the cover (3) occupies its covering position of the opening (2) of the basin (1) so as to tensioning the peripheral wire (16) along the edges (B) of the basin (1) to a tension value preventing it from being manually raised.

5. Device according to one of the preceding claims, characterized in that the rolling structure

(7) comprises at each end of the roller two feet (8) pivotally mounted at one of their ends around the corresponding end of the roller (4) and two wheels (9) carried by the opposite ends of the two legs (8), which can occupy a standing position by forming a support triangle of the roll (4) or a flattened position on the ground to which the two legs (8) are substantially in the same horizontal plane in s extending on both sides of the roll

(4) perpendicular to the latter.

6. Device according to claim 5, characterized in that the two support legs (8) of one end of the roller (4) are held in their upright position by a lever (10) pivotally mounted at one of its ends. at one of the feet (8) and can be hung at its opposite end to the other foot (8).

7. Device according to one of the preceding claims, characterized in that it comprises a strap

(22) one end of which is attached to the roller (4) at center of the latter and initially wrapped around the sheet (3) when itself wrapped around the roller (4) and can be manually entered at its free end by a person to allow the rotation of the roller (4) and the course of the cover (3) by traction exerted on the strap (22) also causing the displacement of the rolling structure (7).

8. Device according to one of claims 4 to 7, characterized in that each tensioning means (19) is ratchet that can be stowed at the end of a strap (18) attached at its other end to a tip of end (17) of the cable (16) and which can be maneuvered manually to tension the cable (16).

9. Device according to one of the preceding claims, characterized in that the peripheral cable

(16) is housed in a peripheral hem (3a) of the sheet (3).

10. Device according to one of the preceding claims, characterized in that it comprises at least one strap (39) whose one end is secured to the roller (4) and the opposite end can be secured after unwinding of the tarpaulin (3). ) at an anchor bolt (40) via a tensioning means (41).

11. Device according to one of the preceding claims, characterized in that the roller (4) comprises at least one of its ends a crank

(11) Manually operable by a person to allow winding of the tarpaulin (3) around the roller

(4) in the standing position of the rolling structure (7) as the latter is moved along the lateral edges of the basin (1) until reaching the opposite end of the basin (1) to which the opening (2) thereof is completely unobstructed.

12. Device according to one of claims 1 to 10, characterized in that a motorized assembly is removably attached to one end of the roller (4) and can be controlled to allow the winding of the cover (3) around the roller (4) in the standing position of the rolling structure (7) as the latter is moved along the lateral edges of the basin (1) until reaching the opposite end of the basin (1) to which the opening (2) thereof is completely disengaged.

13. Device according to one of claims 2 to 12, characterized in that two fastening means spaced in the form of hook (23) or stud (23a) are fixed to the ground in a direction parallel to the end edge of the basin (1) where are the two pulleys (21) and allow to hang the part of the cable (16) along the free end side of the sheet (3) and in that the side parts under tension of the cable (16) ) are attached to pitons secured to the ground near the lateral edges of the basin (1).

14. Device according to one of the preceding claims, characterized in that the cover (3) and the opening (2) of the basin (1) are rectangular.

15. Device according to claim 2, characterized in that the anchoring means of the free end side of the sheet (3) comprises two pulleys (21) integral with a yoke of a support piece (33) fixed at each corner of the sheet (33), the support piece (33) having a connecting plate (35) of the eye clevis (36) in which can be anchored a peak of the ground.

16. Device according to one of the preceding claims, characterized in that each pin is anchored to the ground via a bushing (45) fixed in the ground and in which the pin can be moved between a rest position in support on the ground and an anchor position out of the sleeve (45) remaining integral with the latter, the bolt can be removed from the sleeve (45) by unscrewing.

17. A method for depositing a safety cover by unwinding on the edges of a pool including a swimming pool using the device as defined in one of claims 10 to 16, characterized in that it consists in positioning the rolling structure (7) relative to an end edge of the basin (1) so that the roller (4) is arranged substantially transversely to the longitudinal direction of the basin

(1), unwind a free end portion of the tarpaulin

(3) and hook it in the vicinity of its two corners to ground anchoring means, manually grip the strap

(22) wrapped around the sheet (3) and the roll (4) and exert a traction thereon by a person at the opposite end edge of the basin (1) to unroll the sheet (3) as and when as the wheel structure (7) moves under the tension of the strap, fold the rolling structure (7) and the roller (4) flat on the ground when it is close to the opposite edge so that the covering (3) completely covers the opening of the basin (1) and that the cable is resting on the other edges of the basin, securing the two tensioning means (19) on the one hand to pegs (20) anchoring on the ground and on the other hand at the two free ends (17) of the cable (16), and actuate the tensioning means (19) for tensioning the cable on the edges of the basin (1).

18. The method of claim 17, characterized in that it also consists, after the cable is supported on the edges of the basin, to secure at least one strap (39) secured to the roller (4) at a peak of anchoring to the ground (40) by means of a tensioning means (41) so as to tension the sheet (3).

19. A method of winding a safety sheet overly covering the opening of a pool including a pool and using the device as defined in one of claims 10 to 16, characterized in that it it consists in relaxing at least the tension strap (39) of the tarpaulin (3) and the tension straps (18) of the cables (16) by means of the tensioning means (19, 41), detaching the straps (18) secured to the ends of the cable (16) and the strap (39) means tensioners (19, 41), raising the rolling structure (7) with the roller (4) in its upright position, operating the roller (4) in the winding direction of the tarpaulin (3) as and when moving the rolling structure (7) towards the opposite end edge of the basin (1), disengaging the two corners of the sheet (3) from the anchoring means to the ground when the rolling structure (7) is at near the edge of the basin (1), completely wind the sheet (3) around the roller (4) and move the rolling structure (7) to a remote location of the basin (1).