FR2991705A1 - LIFTING DEVICE FOR SHELTER ROOF ELEMENT FOR BASIN. - Google Patents

Abstract

The lifting device (100) for lifting a roofing shelter element for a pool comprises: - a first portion (102), comprising a bearing surface (114) against a pool edge surface, and - a second portion (104), comprising a support (120) of the roof element, characterized in that the second portion (104) is slidably mounted on the first portion (102) between a retracted position, wherein the support (120) is close to the bearing surface (114), and an extended position, in which the support (120) is spaced from the bearing surface (114), and in that the lifting device (100) comprises means resilient biasing the second portion (104) to its deployed position.

Description

The present invention relates to a lifting device for lifting a roofing shelter element for a basin, of the type comprising: a first part comprising a bearing surface against a surface basin border, and - a second part, comprising a support of the roof element. Shelters are known for covering, partially or totally, a pool, for example a swimming pool. Such shelters generally comprise a plurality of roof elements longitudinally juxtaposed next to each other, manipulable independently of each other to release access to the covered surface. These shelters are a solution for protecting swimming pools. Shelters known as "low shelters", so-called because of height lower than the size of a human being, are more particularly known. If the use of such shelters in connection with a pleasure pool allows to isolate the pool from the outside, and thus maintain a temperate atmosphere above the basin and avoid the introduction of any element that pollute water, they nevertheless hinder access to the pool.

Commonly, the shelters are generally designed so that each roof element is separable from the ground and transportable away from the covered surface, this transport being most often done manually. In order to simplify the basin clearing operation, foldable shelters have been developed, whose roof elements are movable in a longitudinal direction between an unfolded shelter configuration, in which all the roof elements are longitudinally juxtaposed next to each other, and a folded configuration of the shelter, wherein at least two roof elements are stacked one on top of the other. These folding shelters generally include lifting devices for lifting the roof elements, so that they can be stacked on top of one another. These lifting devices prevent the user of the shelter from having to lift the roof elements himself, such an operation requiring a great effort on the part of the user and which is often not possible for an individual to do. alone. Such a collapsible shelter is known from FR-A-2 894 607. This shelter comprises roof elements identical to each other, and a lifting device of these roof elements, consisting of two motorized blocks each installed in the extension of the roof. 'an edge of the basin. When the shelter is opened, a first roof element is driven so as to be placed between the two blocks, and a cam system supports it to raise it above the edge surface. of the basin. A second roof element is then moved under the first roof element. However, this known lifting device is not entirely satisfactory. Indeed, it is bulky and expensive. An object of the invention is to provide a lifting device that is inexpensive. Other objectives are that this lifting device is compact, easy to install, and easy to use. For this purpose, the subject of the invention is a lifting device of the aforementioned type, in which the second part is slidably mounted on the first part between a retracted position, in which the support is close to the bearing surface, and a deployed position, wherein the support is spaced from the bearing surface, and the lifting device comprises resilient biasing means of the second part to its deployed position. In particular embodiments of the invention, the lifting device has one or more of the following features, in any technically possible combination (s): - the lifting device comprises a member, engageable and disengageable, retaining the second part in its retracted position, the retaining member being adapted to, when engaged, oppose a force exerted on the second part by the elastic biasing means; the first part comprises a base defining the bearing surface, and at least one finger projecting from the base to a free end, and for the or each finger, the second part defines a housing for the finger, at least part of the elastic biasing means being housed in said housing; the first part comprises at least two fingers spaced from one another and extending substantially parallel to each other; and the support comprises a curved border, the concavity of which is oriented opposite the support surface. The invention also relates to a collapsible shelter for a pool comprising a plurality of roof elements movable along a longitudinal direction between an unfolded configuration of the shelter, in which all the roof elements are juxtaposed longitudinally with each other. side-by-side, resting on an edge surface of the basin, and a folded configuration of the shelter, in which at least two roof elements are arranged one above the other, characterized in that the shelter further comprises at least one lifting device as described above. In particular embodiments of the invention, the shelter has one or more of the following characteristics, according to any combination (s) technically possible (s): - At least one of the roof elements comprises two longitudinal members each defining a lateral edge of the roof element, each spar comprising a groove for receiving the support of the or each lifting device; each roof element comprises two longitudinal members each defining a lateral edge of the roof element, the or each lifting device being adapted so that, when the second part is in the extended position, the distance between the support and the surface of the roof element support is greater than the height of each spar of at least one of the roof elements; - The collapsible shelter comprises at least two lifting devices as described above, said lifting devices being arranged along opposite side edges of the same roof element; the collapsible shelter comprises N lifting devices as described above, arranged along the opposite lateral edges of said roof element, the elastic biasing means of each of said lifting devices being adapted to exert a force greater than or equal to PIN on the second part when in the extended position, where P is the weight of the roof element; said roof element comprises guide wheels of another roof element, each wheel being inclined relative to a contact surface of the roof element against the edge surface; at least one roofing element comprises a rigid reinforcement and a cover carried by said reinforcement, the reinforcement comprising two crosspieces extending substantially parallel to each other, the cover consisting of a plurality of modules, each slidably mounted on each crossmember by means of a sliding connection, the sliding connection comprises a first member integral with the crossmember and a second member integral with the module, one of the first and second members being a slide, and the other of the first and second members being a slide, housed in the slide, the slide and the slide being adapted to each other to oppose the withdrawal of the slide from the slide by applying a longitudinal force distance between the module and the cross-member, - the slide comprises a tubular cavity formed in one of the cross-member and the module, oriented transversely, and a slot, opening into the cavity tubular and in one face of the cross member, respectively of the module, facing the other of the cross member and the module, the slot having a height less than that of the tubular cavity, and the slide comprises a head, housed in the cavity tubular, and a body, extending through the slot, the head having a height greater than that of the slot, - the tubular cavity is cylindrical of revolution, and the head comprises a plate, of height substantially equal to the diameter of the tubular cavity, and having rounded lower and upper ends, - for at least one of the modules, the first member is specific to the module and extends from one lateral end of the cross member to the other lateral end of the cross member, the reinforcement consists of the two crosspieces and two longitudinal members, each connecting one lateral end of one of the crosspieces to one lateral end of the other cross-member, at least one of the modules being moveable; sliding on the sleepers between a first position, in which the module is in abutment against a first of the two longitudinal members, and a second position, in which the module is in abutment against the second of the two longitudinal members, - the roof element has an arch shape, and - the sliding connections are adapted so that at least two modules slide one above the other. The invention also relates to a method of opening a pond shelter as defined above, comprising the following successive steps: a) installation of the lifting devices along the opposite lateral edges of the roof element and securing the second part of each lifting device to the roof element, the second part being in the retracted position, b) moving the second part of each lifting device to its deployed position, the second part raising the element roofing away from the curb surface, and c) moving another roof element from the shelter under the raised roof element. In a preferred embodiment of the invention, the opening method has the following characteristic: - it comprises an additional step a '), between the steps a) of installation and of joining and b) moving of the second part, disengagement of a retaining member of the second part in the retracted position.

Other features and advantages will appear on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which: FIG. 1 is a perspective view of a shelter for Figure 2 is a perspective view of a roofing element of the shelter of Figure 1, in a closed configuration, - Figure 3 is a view similar to Figure 2, the element Figure 4 is a longitudinal sectional view of a first detail of the roof element of Figure 2; Figure 5 is a cross-sectional view of a second detail of the roof element; Figure 6 is a cross-sectional view of a third detail of the roof element of Figure 2, Figure 7 is a perspective view of a lifting device. of the shelter of Figure 1, - Figure 8 is a cross-sectional view of a In a first step of a method according to the invention, FIG. 9 is a view similar to FIG. 8, in a second step of the process, and FIG. similar to Figure 8, in a third step of the method. In the following, the orientation terms are to be understood with respect to the following orthogonal reference mark, represented in FIGS. 1 to 10, and in which: the X axis is a longitudinal axis, extending from the rear to the before, - the Y axis is a transverse axis, oriented from right to left, perpendicular to the X axis and defining with it a horizontal plane, and - the Z axis is a vertical axis, perpendicular to the plane horizontal, and oriented from the bottom to the top.

As can be seen in FIG. 1, the shelter 10 according to the invention is a collapsible shelter covering a pool 12, elongated in the longitudinal direction X. In particular, in FIG. 1, the collapsible shelter 10 is shown in FIG. a closed configuration above the pool 12. The folding shelter 10 is a low shelter. It is substantially symmetrical with respect to a median longitudinal plane M.

The shelter 10 comprises a plurality of roof elements 20 movable in the longitudinal direction X between an unfolded configuration of the shelter 10, in which the roof elements 20 are juxtaposed longitudinally next to each other, as shown in FIG. 1, and a folded configuration of the shelter 10, wherein at least two roof elements 20 are stacked one on the other, at a longitudinal end of the basin 12. In the unfolded configuration, each roof element 20 is placed on a surface S of the edge of the basin 12, this border surface S being typically a lip of the basin 12, or a pavement bordering the basin 12. The process for opening the shelter 10, that is to say to move from the unfolded configuration to the folded configuration, and to close the shelter 10, that is to say to move from the folded configuration to the unfolded configuration, will be described in detail later. In the example shown, the roof elements 20 are four in number, but this example is in no way limiting and, alternatively, the shelter 10 comprises any number of roof elements 20, this number depending on the length of the roof. basin 12, this number being at least two, and preferably greater than or equal to three. Referring to Figure 2, each roof element 20 comprises a rigid armature 22 and a cover 24. Each roof element 20 further has a lower face 26, facing the basin 12, and an upper face 28, opposite the lower face 26, and facing upwards.

The frame 22 is preferably made of aluminum. Alternatively, it is made of plastic material. The armature 22 consists of two crosspieces 30A, 30B, and two longitudinal members 32A, 32B. In particular, it does not include a third spar connecting a cross member 30A to the other 30B.

Each crossbar 30A, 30B extends substantially transversely between a right-hand lateral end 34A and a left-hand lateral end 34B. A front cross member 30A delimits a forward longitudinal end of the roof element 20, and a rear cross member 30B delimits a rear longitudinal end of the roof element 20. Preferably, each cross member 30A, 30B is bent, with a concavity oriented down. It then has a finite radius of curvature, preferably between 3 and 7 m. The roof element 20 thus has an arch shape, the top of which is at a distance from the surface S of between 50 and 100 cm. Alternatively, each cross member 30A, 30B is rectilinear, in other words, it has an infinite radius of curvature, so that the roof element 20 is substantially flat.

The front cross member 30A and the rear cross member 30B have the same radius of curvature and the same length of arc, taken between the lateral ends 34A, 34B of the crossbar.

The cross members 30A, 30B of the roof elements 20 have radii of curvature equal to each other and arc lengths equal to each other. In other words, the roof elements 20 are of substantially the same size as each other. Thus, when the roof elements 20 are juxtaposed next to each other, their upper surfaces 28 are substantially aligned longitudinally with each other. This results in an aesthetic appearance of the shelter 10 unfolded configuration more satisfactory than with a telescopic shelter in which the roof elements are nestled one under the other. Each spar, respectively 32A, 32B, connects a lateral end, respectively 34A, 34B, of one 30A of the cross members to a corresponding lateral end, respectively 34A, 34B of the other cross member 30B. The longitudinal members 32A, 32B thus delimit two parallel lateral edges of the roof element 20. The cover 24 defines the lower face 26 and the upper face 28 of the roof element 20. It consists of a plurality of modules 36A , 36B, each slidably mounted on each crossmember 30A, 30B through a sliding link 38 (Figure 4). In the example shown, these modules 36A, 36B are two in number. The cover 24 does not include a fixed panel relative to the cross members 30A, 30B, unlike the roof elements of the shelters of the state of the art.

Each module 36A, 36B extends between the cross members 30A, 30B. It has a general shape in the cylinder arc sector if the roof element 20 is arch-shaped, and a generally rectangular shape if the roof element 20 is flat. The radius of curvature of each module 36A, 36B is equal to the radius of curvature of the cross members 30A, 30B. Each module 36A, 36B is slidably movable on the crosspieces 30A, 30B between a first position, in which the module 36A, 36B abuts against the right spar 32A, and a second position, in which the module 36A, 36B is in position. stop against left spar 32B. In the example shown in Figure 2, the roof element 20 is in a closed configuration, in which a first module 36A is in its first position, and the second module 36B is in its second position. In the example shown in FIG. 3, the roof element is in an open configuration, in which the two modules 36A, 36B are in their second position. More generally, the closed configuration of the roof element 20 will be defined as that in which the modules 36A, 36B form a continuous cover of the basin 12, and the open configuration of the roof element 20 will be defined as a configuration. in which at least one module 36A, 36B is arranged so as not to form a continuous cover of the basin 12. Each module 36A, 36B comprises a rigid frame 40, and a panel 42 carried by the frame 40.

The frame 40 defines the contour of the module 36A, 36B. It is advantageously made of aluminum, so as to lighten the module 36A, 36B. It comprises two transverse sections 44, a plurality of longitudinal beams 46A, 46B, 46C, and means (not shown) for fixing each transverse section 44 to each longitudinal beam 46A, 46B, 46C.

Each transverse section 44 defines a longitudinal end of the module 36A, 36B. It extends from a first lateral end 48A of the module 36A, 36B to the second lateral end 48B of the module 36A, 36B. Preferably, as shown in FIG. 4, the panel 42 is encased in the transverse section 44. Each longitudinal beam 46A, 46B, 46C extends from one transverse section 44 to the other. The longitudinal beams 46A, 46B, 46C are regularly distributed between the lateral ends 48A, 48B of the module 36A, 36B, that is to say that they delimit between them sectors of the module 36A, 36B of substantially equal widths. A first longitudinal beam 46A extends along the first lateral end 48A, and a second longitudinal beam 46B extends along the second lateral end 48B. In the example shown, the longitudinal beams 46A, 46B, 46C are three in number. The third beam 46C is then substantially midway between the first and second lateral ends 48A, 48B. Alternatively, the number of longitudinal beams 46A, 46B, 46C is equal to two, or strictly greater than three.

The second lateral end 48B of each module 36A, 36B is designed to bear against one of the longitudinal members 32A, 32B when the roof element 20 is in a closed configuration. Note that, in the example shown, the first lateral end 48A of the first module 36A is its left lateral end, the second lateral end 48B of the first module 36A is its right lateral end, the first lateral end 48A of the second module 36B is its right lateral end, and the second lateral end 48B of the second module 36B is its left lateral end. The fixing means comprise for example screws. The panel 42 is typically made of transparent polycarbonate.

Referring to Figure 4, the sliding connection 38 comprises a first member 50 secured to the cross member 30A, 30B, and a second member 52 secured to the module 36A, 36B. The first member 50 extends from one lateral end 34A of the cross member 30A, 30B to the other lateral end 34B. The second member 52 extends from a lateral end 48A of the module 36A, 36B to the other lateral end 48B. The cross member 30A, 30B carries at least two first members 50. These first members 50 are advantageously, as shown, arranged one above the other. Thus, when a module 36A, 36B slidably moves relative to another module 36A, 36B, the modules 36A, 36B can pass one above the other. The stroke of a module 36A, 36B is thus not impeded by the presence of the other modules 36A, 36B. There is thus an upper module 36A, and a lower module 36B. Each first member 50 is preferably specific to a module 36A, 36B.

The first member 50 is constituted by a slide 54, and the second member 52 is constituted by a slide 56 housed in the slide 54. In a variant, the first member 50 is constituted by a slide, and the second member 52 is constituted by a slide, the slide being housed in the slide. The slide 54 is continuous. Advantageously, the slider 56 is also continuous. In a variant, the slider 56 is discontinuous. The slide 54 and the slider 56 are adapted to each other to oppose the withdrawal of the slider 56 from the slider 54 by applying a longitudinal spacing force between the module 36A, 36B and the cross member 30A. 30B, illustrated by the arrow E in Figure 4. The module 36A, 36B thus contributes to the rigidity of the roof element 20, ensuring the longitudinal connection of the cross members 30A, 30B to one another. In this respect, it differs from the hatches of roofing elements of the state of the art, which consist of a single panel whose opposite edges are housed in U-shaped rails, and which do not give any rigidity to the structure. roof element. For this purpose, the slide 54 comprises a tubular cavity 60, formed in the crossbar 30A, 30B, and a slot 62, opening into the tubular cavity 60 and in a face 64 of the crossbar 30A, 30B oriented towards the module 36A, 36B , the slot 62 having a height less than that of the tubular cavity 60. In addition, the slide 56 comprises a head 66, housed in the tubular cavity 60, and a body 68, extending through the slot 62, the head 66 having a height greater than that of the slot 62.

In this case, the height is defined not in relation to the vertical direction Z, but in relation to a direction oriented perpendicular to the upper face 28. Thus, in the case where the roof element 20 is flat, the height is oriented. parallel to the Z axis and, in the case where the roof element 20 is arch-shaped, the height has components on the Y and Z axes. The tubular cavity 60 is oriented transversely. In other words, its axis is included in a transverse plane. It extends substantially parallel to the upper face 28, a lateral end 34A of the cross member 30A, 30B at the other end 34B. The tubular cavity 60 is advantageously, as shown, cylindrical of revolution.

The slot 62 is continuous and extends from a lateral end 34A of the cross member 30A, 30B to the other lateral end 34B. The head 66 comprises a plate 68, of height substantially equal to the diameter of the tubular cavity 60, and having lower ends 70 and upper 72 rounded. Combined with the cylindrical profile of revolution of the tubular cavity 60, this characteristic makes it possible to prevent the slide 56 from jamming in the slide 54. The body 68 mechanically links the head 66 to the profile 44. Preferably, the body 68, the head 66 and the section 44 are made of material. With reference to FIG. 5, the upper module 36A also comprises means 80 for sealing with the lower module 36B.

These sealing means 80 comprise a seal 84 attached to the first longitudinal beam 46A. The beam 46A delimits in its lower face a longitudinal groove 86 for receiving the seal 84. This groove 86 extends from one transverse section 44 to the other. The seal 84 extends from one transverse section 44 to the other. It comprises a bead 88 housed in the groove 86, and a lip 90 extending from the bead 88 away from the longitudinal section 82. The lip 90 is dimensioned to touch the module 36B when the first end 48A of the module 36A is above it. Referring to Figures 5 and 6, the roof element 20 further comprises means 92 sealing between each module, respectively 36A, 36B, and one of the longitudinal members, respectively 32A, 32B.

These sealing means 92 comprise a second longitudinal section 94, integral with the module 36A, 36B, and a groove 95 for receiving the second longitudinal section 94, formed in the spar 32A, 32B. The longitudinal section 94 defines the second lateral end 48B of the module 36A, 36B. It is fixed to the second longitudinal beam 46B by fastening means (not shown), typically screws. The panel 42 is encased in the longitudinal section 94.

The end of the longitudinal section 94 forming the second lateral end 48B is tapered. Thus, the insertion of the longitudinal section 94 into the groove 96 is facilitated. Still with reference to FIG. 5, the roof element 20 also comprises first wheels 96A, adapted to allow rolling of the roof element 20 on the edge surface S, and second guide wheels 96B of a other roof element 20. The first and second wheels 96A, 96B are housed in the longitudinal members 32A, 32B, at the rate of two first wheels 96A and two second wheels 96B per spar 32A, 32B. In Figure 5, only a first wheel 96A and a second wheel 96B, both housed in the left spar 32B, are visible. Each first wheel 96A comprises a wafer 97 constituting a tread of the first wheel 96A on the edge surface S. The portion of the wafer 97 in contact with the surface S defines a portion 98 of the contact surface of the element roofing 20 on the edge surface S.

Each second wheel 96B is inclined with respect to the contact surface formed by the union of the portions 98 defined by the first wheels 96A. In particular, the generatrix of each second wheel 96B extends substantially parallel to the upper face 28 of the roof element 20 near the spar 32A, 32B in which is housed the wheel 96B. The second wheel 96B is intended to bear on an inclined runway 99 (FIG. 10) formed in the upper face 28 of the other roof element 20. Returning to FIG. 1, the folding shelter 10 also comprises a plurality of lifting devices 100, to lift some of the roof elements 20. The lifting devices 100 are distributed in pairs, the lifting devices 100 of the same pair being arranged along opposite side edges of the same element In other words, a first lifting device 100 of each pair is attached to the right spar 32A of the roof element 20, and the second lifting device 100 of the pair is attached to the left spar 32B of In the example shown, the lifting devices 100 are thus divided into two pairs, a first pair being associated with a first roof element 20, and a second pair being associated with a second roof element 20, juxtaposed with the first. Each lifting device 100 is adapted to lift the spar 32A, 32B to which it is attached under the sole effect of the force it exerts on said spar 32A, 32B. In particular, it is not necessary that an additional force, for example a human force, be applied to the spar 32A, 32B to lift it.

For this purpose, with reference to FIG. 7, each lifting device 100 comprises a first portion 102 and a second portion 104 slidably mounted relative to one another between a retracted configuration of the lifting device 100 (FIG. 8). , and an expanded configuration of the hoist 100 (Figure 9).

The first portion 102 comprises a base 110, and two fingers 112 extending substantially parallel to each other from the base 110. It is fixed to the edge surface S by fixing means (not shown), as screws or studs. Alternatively (not shown), the first portion 102 comprises more than two fingers 112. In another variant (not shown), the first portion 102 comprises a single finger 112, but this variant is to be avoided because the stability of the lifting device 100 is not insured. The base 110 defines a support surface 114 of the lifting device 100 on the edge surface S. In the example shown, the base 110 is formed of two bases 116 spaced from one another and connected one to the other. to the other by a plate 117. Each base 116 supports a respective finger 112 and is for example welded to one face of the plate 117, the opposite plate face 117 defining the bearing surface 114. As a variant (not shown) , the base 110 does not include the plate 117: the bases 116 are then independent of each other and each base 116 defines a portion of the bearing surface 114. In another variant (not shown), the base does not include the bases 116: each finger 112 then rests directly on the plate 117. The fingers 112 are spaced apart from each other. Each finger 112 extends substantially vertically from the base 110 to a free end 118 (Figure 8). In particular, a first of the fingers 112 extends from a first of the plates 116, and the second finger 112 extends from the second plate 116. Each finger 112 is cylindrical, preferably cylindrical of revolution. In the example shown, each finger 112 is hollow and delimits an internal cavity 119A (Figure 8) opening towards the outside of the finger 112 by the free end 118. A bottom 119B, formed by a base 116, closes the cavity 119A at the end opposite the free end 118.

The second portion 104 includes a support 120 for the roof element 20, and two tubular members 122 extending substantially parallel to each other. The support 120 extends from one tubular member 122 to the other. It is formed of a blade 124 having an upwardly concavely curved edge 125 at the opposite of the bearing surface 114. In particular, the blade 124 has an S-shaped cross-section, the curved edge 125 defining a loop of S.

Referring to Figure 8, the support 120 is thus adapted to cooperate with a groove 126 for receiving the support 120 formed in each beam 32A, 32B, so as to hang the roof element 20. The groove 126 has a shape complementary to that of the curved edge 125.

Alternatively, the support 120 has any other form adapted to carry the beam 32A, 32B which is attached to the lifting device 100. For example, the support 120 is a plate having holes for the passage of screws. Each tubular member 122 is integral with the support 120. It is associated with a finger 112 of the first portion 102, and defines a housing 128 for the finger 112. The housing 128 and the associated finger 112 preferably have complementary horizontal sections. The finger 112 extends inside the housing 128. The finger 112 and the tubular member 122 thus form a sliding-slide assembly allowing the second portion 104 to slide on the first portion 102 between a retracted position (corresponding to the retracted configuration of the device 100), in which the support 120 is close to the bearing surface 114, and an extended position (corresponding to the deployed configuration of the device 100), in which the support 120 is at a distance from the surface of the device 114. The first and second parts 102, 104 are adapted to each other so that, when the second portion 104 is in the extended position, the distance between the bearing surface 114 and the support 120 is greater than the height of each spar 32A, 32B of each roof element 20. The height of each spar 32A, 32B is defined as being the greatest distance between a point of the spar 32A, 32B and the edge surface S, when the roof element 20 rests on the edge surface S.

Preferably, the finger 112 and the tubular member 122 comprise complementary stops (not shown) to prevent the finger 112 from leaving the member 122. These stops are preferably positioned so that, when the second part is in the deployed position, said abutments are in contact with each other. An elastic member 130, typically a spring, is housed inside the housing 128, to bias the second portion 104 towards its deployed position. In the example shown, the elastic member 130 is also housed inside the internal cavity 119A of the finger 112, and extends from the bottom 119B of this cavity 119A to a bottom 132 of the housing 128. Alternatively the elastic member 130 extends from the free end 118 of the finger 112 to the bottom 132 of the housing 128.

The elastic member 130 works in compression.

The lifting device 100 thus comprises as many elastic members 130 as fingers 112. These elastic members 130 together form elastic means for biasing the second portion 104 towards its deployed position. These resilient biasing means are adapted to exert a force on the second portion 104, when the second upper portion 104 is in the extended position, greater than or equal to half the weight of the roof element 20 associated with the lifting device 100. Thus, the roof element 20 can be lifted by means of the only lifting devices 100 associated with it. Returning to FIG. 7, the lifting device 100 also includes a retaining member 134 for holding the second portion 104 in the retracted position. Preferably, as shown, the retaining member 134 is adapted to cooperate with a through hole 136 formed in the second portion 104. The through hole 136 is formed in a rib 138 protruding from the support 120 to the opposite of the curved edge 125, the through orifice 136 being disposed substantially equidistant from the tubular members 122. In the example shown, the retaining member 134 is a latch. It comprises a bar 140 extending substantially parallel to the fingers 112. This bar 140 is pivotally mounted about an axis parallel to its direction of extension on the base 110. It extends through the through hole 136. It comprises a slot 142 adapted to cooperate with the rib 138 when the lifting device 100 is in retracted configuration. For this purpose, the through hole 136 has an elongated horizontal section, and the bar 140 has a complementary elongate horizontal section. Thus, depending on the pivot angle of the bar 140, the larger dimension of the horizontal section of the bar 140 is aligned with the larger dimension of the horizontal section of the through hole 136, in which case the retainer 134 is disengaged from port 136, and bar 140 can slide into port 136, or these directions form an angle, in which case retainer 134 is engaged in port 136, and the slot 146 cooperates with the rib 138 to retain the second portion 104 in the retracted position. The horizontal section of the through hole 136 is preferably rectangular as shown. In a variant, it is oblong. The retainer 134 also includes a handle 144 for pivoting the bar 140 about its axis. Said handle 144 comprises a rod 146 extending from the bar 140, substantially perpendicular to the direction of extension of the bar 140. The rod 146 is connected to a portion of the bar 140 between the slot 142 and the connecting end 148 from the bar 140 to the base 110.

In variants not shown of the invention, the retaining member 134 is formed by a screw, a bolt, or any other removable member adapted to exert on the second portion 104 a force opposite to that exerted by the elastic biasing means.

A method of opening the shelter 10 will now be described, with reference to FIGS. 8 to 10. Initially, as shown in FIG. 8, for each lifting device 100, the curved edge 125 is engaged in the groove 126 of FIG. 32A member, 32B to which it is attached, and the retaining member 134 is pivoted so that the slot 142 cooperates with the rib 138. In a first step, the retaining member 134 of one of the lifting devices 100 is pivoted so as to disengage the rib 138 from the slot 142. For this purpose, a user grasps the handle 144 and moves it so as to place the bar 140 substantially in alignment with the through hole 136. In this position, the slot 142 no longer cooperates with the rib 138. Nothing is more opposed to the force exerted by the elastic biasing means on the second portion 104, the lifting device 100 is deployed. In doing so, the second portion 104 drives the beam 32A, 32B to which it is attached away from the edge surface S, as can be seen in FIG. 9.

This operation is then repeated on each other lifting device 100, so that each lifting device 100 is deployed. At the end of this phase, the roof elements 20 on either side of which are arranged the lifting devices 100 are all in a raised position away from the edge surface S. Said roof elements 20 are then carried by the only lifting devices 100. The roof elements 20 remaining to rest on the edge surface S are then moved under the raised roofing elements 20, as shown in FIG. 10. The roofing elements 20 on the ground are rolling. on the edge surface 20 by means of their first wheels 96A, and the second wheels 96B of the raised roof elements 20 roll on the rolling tracks 99 of the roofing elements 20 on the ground. The roofing elements 20 on the ground are thus guided by the second wheels 96B of the raised roof elements 20, which exert a corrective force on the roofing elements 20 on the ground when they tend to be off-axis relative to the median longitudinal plane M. It will be noted that this guidance is made possible because of the inclination of the second wheels 96B and guide tracks 99.

It is thus possible to easily release half of the basin, with little effort for the user. It is further possible to further improve access to the pool, by switching all the roof elements 20 open configuration.

A method of closing the shelter 10 will now be described. Firstly, the roofing elements 20 on the ground are moved again, so as to be disengaged from beneath the raised roof elements 20. Once the space below the raised roof elements has been cleared, a first hoist 100 is retracted. For this purpose, the user exerts a force, opposite to the force of the elastic member 130 and greater than it, on the second portion 104. The user presses for example with his foot on the rib 138. In doing so , the beam 32A, 32B which is hung the second portion 104 of the lifting device 100 descends, until the first wheel 96A housed in the beam 32A, 32B come into contact with the edge surface S.

Once the lifting device 100 in retracted configuration, the lifting device 100 is locked in retracted configuration. For this purpose, the user grasps the handle 144 and rotates the retaining member 134 so as to engage the rib 138 in the slot 142. These operations are then repeated on each other lifting device 100.

In the end, the roof elements 20 all again rest on the border surface S and completely cover the pool 12. Thanks to the invention, it is therefore possible to open and close the shelter 10 very simply and to a lesser extent. effort. In addition, it is possible to easily discover up to 75% of the covered area. Finally, the lifting devices 100 are inexpensive and can be installed retrospectively on an existing shelter. Note that each lifting device 100 may be used with roof elements different from the roofing elements 20 described, it is simply necessary that these roofing elements comprise bodies adapted to cooperate with the support 120 of the lifting device 100. , alternatively (not shown), the shelter 10 comprises any roofing elements, comprising on each of two opposite edges of the roof element a cooperating member with the support 120 of a lifting device 100.35

Claims (13)

1. Lifting device (100) for lifting a roofing element (20) shelter (10) for basin (12), comprising: - a first portion (102), comprising a bearing surface (114) against a pool edge surface (S) (12), and - a second portion (104), comprising a support (120) of the roof element (20), characterized in that the second portion (104) is mounted sliding on the first part (102) between a retracted position, in which the support (120) is close to the bearing surface (114), and an extended position, in which the support (120) is spaced from the surface of the support (114), and in that the lifting device (100) comprises resilient means (130) biasing the second portion (104) to its deployed position. 2. Lifting device (100) according to claim 1, characterized in that it comprises a member (134), engageable and disengageable, retaining the second portion (104) in its retracted position, the retaining member (134) being adapted to, when engaged, opposing a force exerted on the second portion (104) by the elastic biasing means (130). 3. Lifting device (100) according to claim 1 or 2, characterized in that the first part (102) comprises a base (110) defining the bearing surface (114), and at least one finger (112) protruding from the base (110) to a free end (118), and in that, for the or each finger (112), the second portion (104) defines a housing (128) for the finger (112) at least a portion of the elastic biasing means (130) being housed in said housing (128). 4. Lifting device (100) according to claim 3, characterized in that the first portion (102) comprises at least two fingers (112) spaced apart from each other and extending substantially parallel to each other. the other. 5. Lifting device (100) according to any one of the preceding claims, characterized in that the support (120) comprises a curved edge (125), whose concavity is oriented opposite the bearing surface (114). Folding shelter (10) for a pond (12), comprising a plurality of roof elements (20) movable along a longitudinal direction (X) between an unfolded configuration of the shelter (10), wherein all the roof elements (20) are juxtaposed longitudinally next to one another, resting on an edge surface (S) of the basin (12), and a folded configuration of the shelter (10), in which at least two roof elements (20) are arranged one above the other, characterized in that the shelter (10) further comprises at least one lifting device (100) according to any one of the preceding claims. 7. Folding shelter (10) according to claim 6, characterized in that at least one of the roof elements (20) comprises two longitudinal members (32A, 32B) each defining a lateral edge of the roof element (20). each beam (32A, 32B) comprising a groove (126) for receiving the support (120) of the or each lifting device (100). 8. Foldable shelter (10) according to claim 6 or 7, characterized in that each roof element (20) comprises two longitudinal members (32A, 32B) each defining a lateral edge of the roof element (20), the or each lifting device (100) being adapted so that, when the second portion (104) is in the extended position, the distance between the support (120) and the bearing surface (114) is greater than the height of each spar (32A, 32B) of at least one of the roof elements (20). 9. Foldable shelter according to any one of claims 6 to 8, characterized in that it comprises at least two lifting devices (100) according to any one of claims 1 to 5, said lifting devices (100) being disposed along opposite side edges of the same roof element (20). Folding shelter (10) according to claim 9, characterized in that it comprises N lifting devices (100) according to any one of claims 1 to 5 disposed along the opposite side edges of said roof element (20). ), the resilient biasing means (130) of each of said lifting devices (100) being adapted to exert a force greater than or equal to PIN on the second portion (104) when in the extended position, where P is the weight the roof element (20). Folding shelter (10) according to claim 9 or 10, characterized in that said roof element (20) comprises wheels (96B) for guiding another roof element (20), each wheel (96B). being inclined relative to a contact surface (98) of the roof element (20) against the edge surface (S). 12. A method of opening a collapsible shelter (10) according to any one of claims 9 to 11, characterized in that it comprises the following successive steps: a) installation of lifting devices (100) along opposite side edges of the roof element (20) and securing the second part (104) of each lifting device (100) to the roof element (20), the second part (104) being in the retracted position , b) moving the second portion (104) of each lifting device (100) to its extended position, the second portion (104) lifting the roof element (20) away from the edge surface (S) ), andC) moving another roof element (20) of the shelter (10) under the raised roof element. 13. Opening process according to claim 12, characterized in that it comprises an additional step a '), between the steps a) of installation and joining and b) displacement of the second part, disengagement d a member (134) for retaining the second portion (104) in the retracted position.