Formwork device for creating a staircase, assembly comprising the device, staircase, construction comprising the staircase and method for creating a staircase

Abstract

Device (1) for shuttering to produce a staircase comprising: at least one first pillar formwork (10) each delimiting a first pillar cavity (12) having a first upper opening (11), a first lower wall (14) and a first front wall (16) delimiting a first step cavity (15), the first lower wall (14) has a first lower passage (13) arranged opposite the first upper opening (11), at least one second pillar formwork (20) each delimiting a second pillar cavity (22) having a second upper opening (21), a second lower wall (24) and a second front wall (26), the first front wall (16) and the second front wall (26) delimit a second step cavity (25), the second lower wall (24) has a second lower passage (23) arranged opposite the second upper opening (21). Figure for abstract: Figure 1

Description

Title of the invention: Formwork device for creating a staircase, assembly comprising the device, staircase, construction comprising the staircase and method for creating a staircase Disclosure area

[0001] The disclosure relates to the field of masonry, in particular masonry for making a swimming pool. The disclosure relates to a shuttering device for making a staircase and an assembly comprising the device. The disclosure further relates to a staircase and a construction comprising the staircase. Finally, the disclosure relates to a method for making a staircase. State of the art

[0002] Document EP 1 707 706 A1 discloses a shuttering device comprising parts attached to each other and resting on piles, the parts each having a casting volume intended to form stair steps.

[0003] The present disclosure aims to provide a more robust, simpler and less expensive device. Disclosure Statement

[0004] For this purpose, in accordance with the disclosure, the shuttering device for making a staircase comprises:

[0005] at least one first pillar formwork each delimiting a first pillar cavity having a first upper opening,

[0006] a first lower wall and a first front wall delimiting a first step cavity, the first front wall being substantially perpendicular to the first lower wall, the first lower wall has a first lower passage arranged opposite the first upper opening of each first pillar formwork, each first pillar cavity communicating with the first step cavity via the first upper opening and the first lower passage,

[0007] at least one second pillar formwork each delimiting a second pillar cavity having a second upper opening,

[0008] a second lower wall and a second front wall, the second lower wall being parallel to the first lower wall, the second lower wall, the first front wall and the second front wall delimit a second step cavity, the second lower wall has a second lower passage arranged opposite the second upper opening of each second pillar formwork, each second pillar cavity communicating with the second step cavity via the second upper opening and the second lower passage.

[0009] Thus, it is not necessary to make the piles, to rest the device on the piles, then to make the steps, since according to the present disclosure, the pillars and the steps are made at the same time. The device to be transported to be put in place on the construction site to formwork the staircase is also lighter and less bulky. Finally, the staircase is more solid, since the pillars and the steps are made at the same time or, with equal resistance, the staircase allows less concrete to be used to make it.

[0010] According to another characteristic in accordance with the disclosure, preferably the first lower wall has a first front edge, the first front wall bears against the first front edge, the second lower wall has a second front edge and a second rear edge, the first front wall bears against the second rear edge and the second front wall bears against the second front edge.

[0011] Thus, the device is easy to produce, therefore inexpensive and robust.

[0012] According to an additional characteristic in accordance with the disclosure, the first front wall preferably has a (first) rear face comprising a groove in which the first front edge is received.

[0013] Thus, the relative positioning of the first lower wall with respect to the front wall is improved.

[0014] According to a further additional characteristic in accordance with the disclosure, preferably the (first) rear face comprises a succession of (first) grooves, the (first) grooves are disjointed, and the first front edge comprises a succession of ribs received in the (first) grooves creating an interlocking of the first lower wall and the first front wall.

[0015] Thus, the relative positioning of the first lower wall with respect to the front wall is further improved.

[0016] According to another characteristic in accordance with the disclosure, the first front wall is preferably fixed to the first lower wall, more preferably by screwing.

[0017] According to another characteristic in accordance with the disclosure, the second lower wall is preferably fixed to the first front wall, more preferably by screwing.

[0018] According to yet another characteristic in accordance with the invention, preferably each first pillar formwork comprises a (first) front opening, and the first front wall comprises a (first) front passage arranged opposite the (first) front opening of each first pillar formwork, each first pillar cavity communicating with the second step cavity via the first front opening and the first front passage.

[0019] Thus, the robustness of the staircase is further improved.

[0020] According to an additional characteristic, preferably each first pillar formwork comprises a flat front face, resting on the second front wall.

[0021] Thus, communication between each first pillar cavity and the second step cavity via the first front opening and the first front passage is facilitated, preventing concrete from flowing between each first pillar and the first front wall.

[0022] According to an additional characteristic, each first pillar formwork preferably has a triangular cross-section.

[0023] Thus, each first pillar formwork has good mechanical resistance and can be easily produced, in particular by folding a sheet of plastic material.

[0024] According to another characteristic in accordance with the disclosure, each first pillar formwork is preferably engaged and tightly held in the first underpass.

[0025] Thus, the positioning of each first pillar formwork and in particular the first upper opening, relative to each first lower passage of the first lower wall is improved.

[0026] According to another characteristic in accordance with the disclosure, the second front wall is preferably parallel to the first front wall.

[0027] The disclosure further relates to an assembly comprising the aforementioned device and a reinforcement. The reinforcement extends into the first step cavity, the first pillar cavity and the second step cavity by passing through the first lower passage, the first upper opening, the second lower passage and the second upper opening.

[0028] Thus, the robustness of the staircase obtained is improved.

[0029] According to an additional characteristic, preferably the reinforcement also extends through the first frontal passage.

[0030] The disclosure also relates to a staircase. According to the disclosure, the staircase comprises:

[0031] at least one first pillar, each first pillar is surrounded by a first pillar formwork and has a first upper end,

[0032] a first step, a first lower wall and a first front wall, the first step has a first lower step face and a first front step face, the first lower step face is in contact with the first lower wall, the first lower wall has a first lower passage through which the first upper end of each first pillar is connected to the first step (the first step and each first pillar forming a first single-piece assembly obtained from material and passing through the first wall in- lower), the first front step face is in contact with the first front wall,

[0033] at least one second pillar, each second pillar is surrounded by a second pillar formwork and has a second upper end,

[0034] a second step, a second lower wall (24) and a second front wall, the second step has a second lower step face, a second rear step face and a second front step face, the second lower step face is in contact with the second lower wall (24), the second lower wall (24) has a second lower passage through which the second upper end of each second pillar is connected to the second step (the first step and the first pillar form a second one-piece assembly obtained from material and passing through the second lower wall), the second rear step face is in contact with the first front wall, the second front step face is in contact with the second front wall.

[0035] In various embodiments of the staircase according to the disclosure, one and / or the other of the following arrangements may optionally be used in addition:

[0036] each first pillar, the first step, each second pillar and the second step are made of concrete, and the staircase comprises reinforcement extending into each first pillar and into the first step;

[0037] each first formwork, each second formwork, the first bottom wall, the second bottom wall, the first front wall and the second front wall are made of wood or plastic material.

[0038] The disclosure further relates to a construction comprising the aforementioned staircase, a first wall and a second wall, wherein the first step and the second step extend in a longitudinal direction between the first wall and the second wall.

[0039] According to another characteristic in accordance with the disclosure, preferably the construction comprises a raft and an enclosure forming a swimming pool, the enclosure including the staircase, the first wall and the second wall.

[0040] The disclosure finally relates to a method for producing a staircase. According to the disclosure, the method comprises the following operations:

[0041] production of at least one first pillar formwork, each first pillar formwork delimiting a first pillar cavity having a first upper opening,

[0042] production of a first step cavity, the first step cavity communicating with each first pillar cavity through the first upper opening,

[0043] production of at least one second pillar formwork, each second pillar formwork delimiting a second pillar cavity having a second upper opening,

[0044] production of a second step cavity, the second step cavity communicating with each second pillar cavity through the second upper opening,

[0045] filling each first pillar cavity with concrete, each first pillar cavity communicating with the first step cavity via each first upper opening,

[0046] filling the first step cavity with concrete,

[0047] filling each second pillar cavity with concrete, each second pillar cavity communicating with the second step cavity via each second upper opening,

[0048] filling the second step cavity with concrete.

[0049] In various embodiments according to the disclosure, the method may optionally further comprise one and / or the other of the following provisions:

[0050] each first pillar formwork is made with a (first) front opening, the first front wall comprises a front passage arranged opposite the front opening of each first pillar formwork, and the method comprises pouring concrete between each first pillar cavity and the second step cavity via the (first) front opening and the first front passage;

[0051] the production of each first pillar formwork comprises the folding of a sheet of plastic material;

[0052] the sheet is rectangular and comprises at least a first portion, a second portion, a third portion and a flap portion separated by parallel fold lines, the sheet is folded along each fold line and the flap portion is folded against the first portion to which it is fixed;

[0053] the method further comprises, after hardening of the concrete in the first step cavity forming a first step, in each first pillar cavity forming a first pillar, in the second step cavity forming a second step and in each second pillar cavity forming a second pillar, covering the first step and the second step with a liner.

[0054] According to the disclosure, the method preferably further comprises the following provisions:

[0055] the production of the first step cavity comprises:

[0056] fixing a first front wall perpendicular to a first lower wall, and

[0057] arrangement of a first lower passage of the first lower wall opposite the first upper opening of each first pillar formwork,

[0058] the production of the first step cavity comprises:

[0059] fixing a second front wall perpendicular to a second in- wall lower, and

[0060] provision of a second lower passage of the second lower wall opposite the second upper opening of each second pillar formwork.

[0061] According to another provision in accordance with the disclosure, preferably the method further comprises the following operations:

[0062] production of a first wall cavity communicating with the first step cavity by a first end of the first step and with the second step cavity by a first end of the second step, and

[0063] production of a second wall cavity communicating with the first step cavity by a second end of the first step and with the second step cavity by a second end of the second step,

[0064] filling the first wall cavity with concrete to form a first wall, the first wall cavity communicating with the first step cavity through the first step end and with the second step cavity through the first step end, and

[0065] filling the second wall cavity with concrete to form a second wall, the second wall cavity communicating with the first step cavity through the second end of the first step and with the second step cavity through the second end of the second step. Brief description of the figures

[0066] Other features and advantages of the present disclosure will become apparent from the following detailed description, with reference to the accompanying drawings in which:

[0067] [Fig-1] represents in perspective an assembly comprising a device and an iron mockery,

[0068] [Fig.2] represents the device in exploded perspective,

[0069] [Fig.3] represents the device in section along the line marked III-III in [Fig. 1],

[0070] [Fig.4] represents a plate for producing a formwork belonging to the device,

[0071] [Fig.5] represents the formwork made with the plate shown in [Fig.4],

[0072] [Fig.6] represents a construction made with the assembly,

[0073] [Fig.7] partially represents a construction carried out after pouring concrete in the whole, in perspective,

[0074] [Fig.8] shows in perspective a construction variant. Detailed Description of Disclosure

[0075] Figures 1 to 3 illustrate an assembly 50 comprising a device 1 and reinforcement 8. The device 1 is used to produce a staircase 100, illustrated in [Fig.6]. In the illustrated embodiment, the staircase 100 produced with the device 1 comprises four steps. Alternatively, the staircase could consist of two or more steps.

[0076] In the illustrated embodiment, the staircase 100 produced is a corner staircase. The device 1 comprises a first pillar formwork 10, two second pillar formworks 20, three third pillar formworks 30 and four fourth pillar formworks 40. Alternatively, the device 1 could comprise a number of first pillar formworks 10, second pillar formworks 20, third pillar formworks 30 and fourth pillar formworks 40 different from that of the illustrated embodiment. In particular in the case of a straight staircase, as illustrated in [Fig.8], this number could be the same for the different pillar formworks.

[0077] In the illustrated embodiment, each first pillar formwork 10, each second pillar formwork 20, each third pillar formwork 30 and each fourth pillar formwork 40 has a tubular shape of triangular section extending in the vertical direction Z. The third pillar formworks 30 have a height in the vertical direction Z greater than the height of the fourth pillar formworks 40 by a step pitch p. The step pitch p is between 15 centimeters and 40 centimeters, preferably the step pitch p is substantially equal to 30 centimeters (to within 5 centimeters).In order for the staircase 100 to have the same height difference between each step, the second pillar formwork 20 has a height in the vertical direction Z greater than the height of the third pillar formwork 30 of the step p and the first pillar formwork 10 has a height in the vertical direction Z greater than the height of the second pillar formwork 20 of the step p.

[0078] The first pillar formwork 10 comprises a first front face 10a, planar, and two first lateral faces 10b and 10c, preferably planar. Each first second pillar formwork 20 comprises a second front face 20a, planar, and two second lateral faces 20b and 20c, preferably planar. Each third pillar formwork 30 comprises a third front face 30a, planar, and two third lateral faces 30b and 30c, preferably planar. Each first fourth pillar formwork 40 comprises a fourth front face 40a, planar, and two fourth lateral faces 40b and 40c, preferably planar.

[0079] Furthermore, the device 1 comprises a first bottom wall 14, a first front wall 16, a second bottom wall 24, a second front wall 26, a third bottom wall 34, a third front wall 36, a fourth bottom wall 44 and a fourth front wall 46.

[0080] The first bottom wall 14, the second bottom wall 24, the third bottom wall 34 and the fourth bottom wall 44 are planar and extend perpendicular to a vertical direction Z, in other words the ... lower 44 are all parallel to each other and extend substantially horizontally. The first lower wall 14, the second lower wall 24, the third lower wall 34 and the fourth lower wall 44 are substantially offset from each other by the same distance in the vertical direction Z. More precisely, the third lower wall 34 is offset upwards by the step p relative to the fourth lower wall 44, the second lower wall 24 is offset upwards by the step p relative to the third lower wall 34 and the first lower wall 14 is offset upwards by the step p relative to the second lower wall 24.

[0081] The first bottom wall 14 comprises a first front edge 14a and first side edges 14c, 14d. In the illustrated embodiment, the first side edges 14c, 14d are perpendicular and adjacent, in other words the first bottom wall 14 forms a right isosceles triangle perpendicular to the vertical direction Z. The second bottom wall 24 comprises a second front edge 24a, a second rear edge 24b and second side edges 24c, 24d. The third bottom wall 34 comprises a third front edge 34a, a third rear edge 34b and third side edges 34c, 34d. The fourth bottom wall 44 comprises a fourth front edge 44a, a fourth rear edge 44b and fourth side edges 44c, 44d. The second bottom wall 24, the third bottom wall 34 and the fourth bottom wall 44 each form a trapezoid perpendicular to the vertical direction Z.

[0082] The first front wall 16, the second front wall 26, the third front wall 36 and the fourth front wall 46 extend substantially vertically, in other words substantially perpendicular to the first lower wall 14, the second lower wall 24, the third lower wall 34 and the fourth lower wall 44. The first front wall 16 extends in a transverse direction Y, perpendicular to the vertical direction Z, between a first front face 16a and a first rear face 16b. The first front wall 16 extends in the vertical direction Z between a first upper edge 16c and a first lower edge 16d. The second front wall 26 extends in the transverse direction Y between a second front face 26a and a second rear face 26b. The second front wall 26 extends in the vertical direction Z between a second upper edge 26c and a second lower edge 26d.The third front wall 36 extends in the transverse direction Y between a third front face 36a and a third rear face 36b. The third front wall 36 extends in the vertical direction Z between a third upper edge 36c and a third lower edge 36d. The fourth front wall 46 extends in the transverse direction Y between a fourth front face 46a and a fourth rear face 46b. The fourth front wall 46 extends in the direction . vertical Z between a fourth upper edge 46c and a fourth lower edge 46d. In the illustrated embodiment, the first front wall 16, the second front wall 26, the third front wall 36 and the fourth front wall 46 are planar and extend perpendicular to the transverse direction Y. Alternatively, the first front wall 16, the second front wall 26, the third front wall 36 and the fourth front wall 46 could be arcuate, in particular form an arc of a circle around the vertical direction Z.

[0083] Along a longitudinal direction X, perpendicular to the vertical direction Z and to the transverse direction Y, the first front edge 14a of the first lower wall 14 comprises a succession of disjointed ribs 4 inserted into a succession of disjointed grooves 6 made in the first rear face 16b of the first front wall 16. Thus, the first front wall 16 is positioned relative to the first front edge 14a along the longitudinal direction Y and the vertical direction Z. The first front edge 14a of the first front wall 14 bears against the first front wall 16 and is fixed to the front wall 16, preferably by front fixing screws 5. The second front edge 24a of the second lower wall 24 is positioned and fixed in a similar manner relative to the second front wall 26.The third front edge 34a of the third bottom wall 34 is positioned and fixed in a similar manner relative to the third front wall 36. The fourth front edge 44a of the fourth bottom wall 44 is positioned and fixed in a similar manner relative to the fourth front wall 46.

[0084] Along the longitudinal direction X, the first lower edge 16d of the first front wall 16 comprises a succession of crenellations and the second rear edge 24b of the second lower wall 24 comprises a succession of complementary crenellations, so that the first lower edge 16d and the second rear edge 24b are nested within each other, in order to allow their positioning along the longitudinal direction X, the transverse direction Y and the vertical direction Z. The first lower edge 16d and the second rear edge 24b are fixed to each other, preferably by rear fixing screws 9 (shown diagrammatically by a center line in [Fig.3]). The second lower edge 26d and the third rear edge 34b are positioned and fixed relative to each other in a similar manner. The third lower edge 36d and the fourth rear edge 44b are positioned and fixed relative to each other in a similar manner.

[0085] In the illustrated embodiment, the device 1 further comprises a first wall formwork 110 and a second wall formwork 120. The first wall formwork 110 has a first wall inner wall 114 and a first wall outer wall 116 delimiting between them a first wall cavity 115. The second wall formwork 120 has a second wall inner wall 124 and an outer wall of second wall 126 delimiting between them a second wall cavity 125. Along the longitudinal direction X, the first front wall 16 extends between first lateral edges 16e, 16f which bear respectively against the inner wall of the first wall 114 and the inner wall of the second wall 124. The first front wall 16 is fixed to the inner wall of the first wall 114 along the first lateral edge 16e and to the inner wall of the second wall 124 along the first lateral edge 16f, preferably by lateral fixing screws 7. Along the longitudinal direction X, the second front wall 26 extends between second lateral edges 26e, 26f which bear respectively against the inner wall of the first wall 114 and the inner wall of the second wall 124.The second front wall 26 is fixed to the first wall inner wall 114 along the second side edge 26e and to the second wall inner wall 124 along the second side edge 16f, preferably by lateral fixing screws 7. In the longitudinal direction X, the third front wall 36 extends between third side edges 36e, 36f which respectively bear against the first wall inner wall 114 and the second wall inner wall 124. The third front wall 36 is fixed to the first wall inner wall 114 along the third side edge 36e and to the second wall inner wall 124 along the third side edge 36f, preferably by lateral fixing screws 7. In the longitudinal direction X, the fourth front wall 46 extends between fourth side edges 46e, 46f which respectively bear against the first wall inner wall 114 and the second wall inner wall 124.The fourth front wall 46 is attached to the first wall inner wall 114 along the fourth side edge 46e and to the second wall inner wall 124 along the fourth side edge 46f, preferably by side fixing screws 7.

[0086] The first front wall 16 and the second bottom wall 24 delimit a first step cavity 15. The first step cavity 15 has, along the longitudinal direction X, a first first step end 15a and a second first step end 15b. The first front wall 16, the second bottom wall 24 and the second front wall 26 delimit a second step cavity 25. The second step cavity 25 has, along the longitudinal direction X, a first second step end 25a and a second second step end 25b. The second front wall 26, the third bottom wall 34 and the third front wall 36 delimit a third step cavity 35. The third step cavity 35 has, along the longitudinal direction X, a first third step end 35a and a second third step end 35b.The third front wall 36, the fourth lower wall 44 and the fourth front wall 46 delimit a fourth step cavity 45. The fourth step cavity 45 has, in the longitudinal direction X, a first . fourth step end 45a and a second fourth step end 45b.

[0087] In the illustrated embodiment, the first wall inner wall 114 optionally has first side openings communicating the first wall cavity 115 with the first end of the first step 15a, the first end of the second step 25a, the first end of the third step 35a and the first end of the fourth step 45a. Furthermore, the first wall inner wall 114 has second side openings communicating the second wall cavity 125 with the second end of the first step 15b, the second end of the second step 25b, the second end of the third step 35b and the second end of the fourth step 45b. Alternatively, the first wall inner wall 114 could be devoid of the first side openings and / or the second wall inner wall 124 could be devoid of the second side openings.

[0088] The first pillar formwork 10 delimits a first pillar cavity 12 having a first upper opening 11, at the upper end of the first pillar formwork 10 in the vertical direction Z. The first lower wall 14 has a first lower passage 13. The first lower passage 13 has a triangular section. The first pillar formwork 10 is engaged and tightly held, near its upper end, in the first lower passage 13. Each first pillar cavity 12 communicates with the first step cavity 15 via the first upper opening 11 and the first lower passage 13.

[0089] The first pillar formwork 10 comprises a first front opening 12a made in the first front face 10a. The first front face 10a bears against the first rear face 16b. The first front wall 16 comprises a first front passage 17 arranged opposite the first front opening 12a. Thus, each first pillar cavity 12 communicates with the second step cavity 25 via the first front opening 12a and the first front passage 17.

[0090] Each second pillar formwork 20 delimits a second pillar cavity 22 having a second upper opening 21, at the upper end of each second pillar formwork 20 in the vertical direction Z. The second lower wall 24 has second lower passages 23. The second lower passages 23 have a triangular section. Each second pillar formwork 20 is engaged and tightly held, near its upper end, in one of the second lower passages 23. Each second pillar cavity 22 communicates with the second step cavity 25 via the second upper openings 21 and the second lower passages 23.

[0091] Each second pillar formwork 20 comprises a second front opening 22a made in the second front face 20a. Each second front face 20a bears against the second rear face 26b. The second front wall 26 comprises second front passages 27 arranged opposite the second front openings 22a. Thus, each second pillar cavity 22 communicates with the third step cavity 35 via the second front openings 22a and the second front passages 27.

[0092] Each third pillar formwork 30 delimits a third pillar cavity 32 having a third upper opening 31, at the upper end of each third pillar formwork 30 in the vertical direction Z. The third lower wall 34 has third lower passages 33. The third lower passages 33 have a triangular section. Each third pillar formwork 30 is engaged and tightly held, near its upper end, in one of the third lower passages 33. Each third pillar cavity 32 communicates with the third step cavity 35 via the third upper openings 31 and the third lower passages 33.

[0093] Each third pillar formwork 30 comprises a third front opening 32a made in the third front face 30a. Each third front face 30a bears against the third rear face 36b. The third front wall 26 comprises third front passages 37 arranged opposite the third front openings 32a. Thus, each third pillar cavity 32 communicates with the fourth step cavity 45 via the third front openings 32a and the third front passages 37.

[0094] Each fourth pillar formwork 40 delimits a fourth pillar cavity 42 having a fourth upper opening 41, at the upper end of each fourth pillar formwork 40 in the vertical direction Z. The fourth lower wall 44 has fourth lower passages 43. The fourth lower passages 43 have a triangular section. Each fourth pillar formwork 40 is engaged and tightly held, near its upper end, in one of the fourth lower passages 43. Each fourth pillar cavity 42 communicates with the fourth step cavity 45 via the fourth upper openings 41 and the fourth lower passages 43.

[0095] Each fourth front face 40a bears against the fourth rear face 46b.

[0096] The reinforcement 8 is formed of intersecting metal elements, the metal elements preferably being formed by rods bent to form rectangular frames. The reinforcement 8 extends continuously (it is not formed of disjointed portions) in the first step cavity 15, the first pillar cavity 12, the second step cavity 25, the second pillar cavity 22, the third step cavity 35, the third pillar cavity 32, the fourth step cavity 45 and the fourth pillar cavity 42, passing through the first upper opening 11, the first lower passage 13, the first front opening 12a, the first front passage 17, the second upper opening 21, the second lower passage 23, the second front opening 22a, the second front passage 27, the third upper opening 31, the third lower passage 33, the third front opening 32a, the third front passage 37, the fourth upper opening 41 and the fourth lower passage 43.

[0097] The first lower wall 14, the second lower wall 24, the third lower wall 34 and the fourth lower wall 44 are preferably formed by plates of constant thickness, advantageously between 5 millimeters and 2 centimeters, advantageously made of wood.

[0098] The first front wall 16, the second front wall 26, the third front wall 36 and the fourth front wall 46 are preferably formed by plates of constant thickness, advantageously between 5 millimeters and 2 centimeters, advantageously made of plastic material.

[0099] Figures 4 and 5 illustrate the production of pillar formwork, more precisely the first pillar formwork 10. As illustrated in [Fig.4], a sheet 60 is used, made of plastic material, substantially rectangular in which three parallel fold lines 63, 65, 67 are produced separating the sheet 60 into a first portion 62, a second portion 64, a third portion 66 and a flap portion 68. The fold lines 63, 65, 67 are preferably each formed by a groove having a triangular section, advantageously with an angle of 120 degrees. The first front opening 12a is produced by cutting in the second portion 64.

[0100] Then, the sheet 60 is folded at 120 degrees along each fold line 63, 65, 67, the flap portion 68 is folded against the first portion 62 and the flap portion 68 is fixed against the first portion 62 by screwing, gluing or the like.

[0101] As illustrated in [Fig.5], the first pillar formwork 10 is thus produced, the second portion 64 forming the front face 10a, the third portion 66 forming the lateral face 10 and the first portion 62 forming the lateral face 10d. The second pillar formwork 20, the third pillar formwork 30 and the fourth pillar formwork 40 are produced in a similar manner.

[0102] The first lower wall 14, the second lower wall 24, the third lower wall 34 and the fourth lower wall 44 are preferably produced by sawing a wooden plate and preferably with a router for the first lower passage 13, the second lower passage 23, the third lower passage 33, the fourth lower passage 43, the ribs 4 of the first front edge 14a, of the second front edge 24a, of the third front edge 34a and of the fourth front edge 44a, and the crenellations of the second rear edge 24b, of the third rear edge 34b and of the fourth rear edge 44b.

[0103] The first front wall 16, the second front wall 26, the third front wall 36 and the fourth front wall are produced, preferably by cutting from a plate, and the grooves 6 are produced with a numerically controlled milling machine in the first rear face 16b, the second rear face 26b, the third rear face 36b and the fourth rear face 46b, as well as the first front passage 17, the second front passages 27 and the third front passages 37.

[0104] The ribs 4 of the first lower wall 14 are inserted into the grooves 6 of the first front wall 16, the ribs of the second lower wall 24 into the grooves 6 of the second front wall 26, the ribs of the third lower wall 34 into the grooves 6 of the third front wall 36, the ribs of the fourth lower wall 44 into the grooves 6 of the fourth front wall 46 and the first lower wall 14 is fixed perpendicular to the first front wall 16, the second lower wall 24 perpendicular to the second front wall 26, the third lower wall 34 perpendicular to the third front wall 36, the fourth lower wall 44 perpendicular to the fourth front wall 46, preferably with the front fixing screws 5.

[0105] The slots of the first lower edge 16d are nested with the slots of the second rear edge 24b, the slots of the second lower edge 26d with the slots of the third rear edge 34b and the slots of the third lower edge 36d with the slots of the fourth rear edge 44b and the first front wall 16 is fixed perpendicular to the second front wall 24, the second front wall 26 perpendicular to the third lower wall 34, the third front wall 36 perpendicular to the fourth lower wall 44 with the rear fixing screws 9.

[0106] The first pillar formwork 10 is inserted into the first lower passage 13, the second pillar formwork 20 into the second lower passage 23, the third pillar formwork 30 into the third lower passage 33, the fourth pillar formwork 40 into the fourth lower passage 43, by arranging the first front passage 17 opposite the first front opening 12a, the second front passage 27 opposite the second front opening 22, the third front passage 37 opposite the third front opening 32 and the fourth front passage 47 opposite the fourth front opening 42. Thus, the first lower passage 13 is arranged opposite the first upper opening 11, the second lower passage 23 opposite the first upper opening 21, the third lower passage 33 opposite the third upper opening 31 and the fourth lower passage 43 opposite the fourth upper opening 41..

[0107] The first pillar 18, the second pillars 28, the third pillars 38 and the fourth pillars 48 resting on the ground or optionally offset by a predetermined distance from the ground and the first lateral edge 16e, the second lateral edge 26e, the third lateral edge 36e, and the fourth lateral edge 46e are fixed to the inner wall of the first wall 114, and the first lateral edge 16f, the second lateral edge 26f, the third lateral edge 36f, and the fourth lateral edge 46f are fixed to the inner wall of the second wall 124. Optionally, the first wall formwork 110 is produced by fixing the outer wall of the first wall 116 to the inner wall of the first wall 114 and the second wall formwork 120 is produced by fixing the outer wall of the second wall 126 to the inner wall of the second wall 124. Thus, the first step cavity 15, the second step cavity 25, the third step cavity step 35 and the fourth step cavity 45.

[0108] The first step cavity 15, the second step cavity 25, the third step cavity 35 and the fourth step cavity 45 preferably communicate with the first wall cavity 115 via the first step end 15a, the first step end 25a, the first step end 35a and the first step end 45a. The first step cavity 15, the second step cavity 25, the third step cavity 35 and the fourth step cavity 45 preferably communicate with the second wall cavity 125 via the second step end 15b, the second step end 25b, the second step end 35b and the second step end 45b.

[0109] The reinforcement elements 8 are passed:

[0110] from the first step cavity 15 to the first pillar cavity 12 passing through the first lower passage 13 and the first upper opening 11,

[0111] from the first pillar cavity 12 to the second step cavity 25 passing through the first front opening 12a and the first front passage 17,

[0112] from the second step cavity 25 to the second pillar cavity 22 passing through the second lower passage 23 and the second upper opening 21,

[0113] from the second pillar cavity 22 to the third step cavity 35 passing through the second front opening 22a and the second front passage 27,

[0114] from the third step cavity 35 to the third pillar cavity 32 passing through the third lower passage 33 and the third upper opening 31,

[0115] from the third pillar cavity 32 to the fourth step cavity 45 passing through the third front opening 32a and the third front passage 37,

[0116] from the fourth step cavity 45 to the fourth pillar cavity 42 passing through the fourth lower passage 43 and the fourth upper opening 4L

[0117] Preferably, a space is left between the floor and the inner wall of the first wall 114,and between the floor and the interior wall of second wall 124. ,

[0118] Then, the first step cavity 15, the first pillar cavity 12, the second step cavity 25, the second pillar cavity 22, the third step cavity 35, the third pillar cavity 32, the fourth step cavity 45, the fourth pillar cavity 42, the first wall cavity 115 and the second wall cavity 125 are filled with concrete by pouring concrete into the first upper opening 11, the first front opening 12a, the first front passage 17, the second upper opening 21, the second front opening 22a, the second front passage 27, the third upper opening 31, the third front opening 32a, the third front passage 37, the fourth upper opening 41, the first end of the first step 15a, the first end of the second step 25a, the first end of the third step 35a, the first end of the fourth step 45a, the second end of the first step 15a, the first end of the second step 15a, the first end of the third step 15a, the first end of the fourth step 1 ... walk 15b,the second end of second step 25b, the second end of third step 35b, the second end of fourth step 45b, and concrete is poured on the ground between the outer wall of first wall 116 and the outer wall of second wall 126, passing concrete under the inner wall of first wall 114 and under the inner wall of second wall 124.,

[0119] As illustrated in [Fig.6], after the concrete has hardened, a construction 200 forming a swimming pool is thus obtained. The construction 200 comprises a foundation 130, a first wall 112, a second wall 122 and the staircase 100.

[0120] The staircase 100 comprises the reinforcement 8 embedded in a first pillar 18, a first step 19, second pillars 28, a second step 29, third pillars 38, a third step 39, fourth pillars 48 and a fourth step 49 made of concrete.

[0121] Optionally (they could be removed after the concrete has hardened), the staircase 100 further comprises the first bottom wall 14, the first front wall 16, the second bottom wall 24, the second front wall 26, the third bottom wall 36, the third front wall 36, the fourth bottom wall 44 and the fourth front wall 46. Likewise, optionally, the construction 200 further comprises the first wall inner wall 114, the first wall outer wall 116, the second wall inner wall 124 and the second wall outer wall 126.

[0122] For the sake of readability, [Fig.7] represents the staircase 100 (the raft 130, the first wall 112, the second wall 114, the inner wall of the first wall 114, the outer wall of the first wall 116, the inner wall of the second wall 124 and the outer wall of the second wall 126 are not represented in [Fig.7]) without the first lower wall 14, the first front wall 16, the second lower wall 24, the second front wall 26, the third lower wall 36, the third front wall 36, the fourth lower wall 44 and the fourth front wall 46.

[0123] The first pillar 18 is surrounded by the first pillar formwork 10 and has a first upper end 18a and a lower end 18b. The second pillars 18 are surrounded by the second pillar formworks 20 and each have a second upper end 28a and a second lower end 28b. The third pillars 38 are surrounded by the third pillar formworks 30 and each have a third upper end 38a and a third lower end 38b. The fourth pillars 48 are surrounded by the fourth pillar formworks 40 and each have a fourth upper end 48a and a fourth lower end 48b.

[0124] The first step 19 has a first lower step face 19a perpendicular to the vertical direction Z, a first front step face 19b perpendicular to the transverse direction Y and a first upper step face 19c opposite the first lower step face 19a. In the longitudinal direction X, the first step 19 extends between the first wall 112 and the second wall 122. In the illustrated embodiment, the concrete extends continuously between on the one hand the first step 19 and the first wall 112, passing through the inner wall of the first wall 114, and on the other hand between the first step 19 and the second wall 122, passing through the inner wall of the second wall 124.

[0125] The first lower step face 19b is in contact with the first lower wall 14. The first front step face 19b is in contact with the first rear face 16b of the first front wall 16. The first pillar 18 projects from the first lower step face 19a and passes through the first lower passage 13 near the first upper end 18a. The first pillar 18 is connected to the second step 26 through the first front opening 12a and the first front passage 17

[0126] The second step 29 has a second lower step face 29a perpendicular to the vertical direction Z, a second front step face 29b perpendicular to the transverse direction Y, a second upper step face 29c opposite the second lower step face 29a and a second rear step face 29d opposite the second front step face 29b. In the longitudinal direction X, the second step 29 extends between the first wall 112 and the second wall 122. In the illustrated embodiment, the concrete extends continuously between on the one hand the second step 29 and the first wall 112, passing through the inner wall of the first wall 114, and on the other hand between the second step 29 and the second wall 122, passing through the inner wall of the second wall 124.

[0127] The second lower step face 29b is in contact with the second lower wall 24. The second front step face 29b is in contact with the second face rear 26b of the second front wall 26. The second pillars 28 project from the second lower step face 29a and pass through the second lower passages 23 near the second upper ends 28a. The second pillars 28 are connected to the third step 36 through the second front openings 22a and the second front passages 27.

[0128] The third step 39 has a third lower step face 39a perpendicular to the vertical direction Z, a third front step face 39b perpendicular to the transverse direction Y, a third upper step face 39c opposite the third lower step face 39a and a third rear step face 39d opposite the third front step face 39b. In the longitudinal direction X, the third step 39 extends between the first wall 112 and the second wall 122. In the illustrated embodiment, the concrete extends continuously between on the one hand the third step 39 and the first wall 112, passing through the inner wall of the first wall 114, and on the other hand between the third step 39 and the second wall 122, passing through the inner wall of the second wall 124.

[0129] The third lower step face 39b is in contact with the third lower wall 34. The third front step face 39b is in contact with the third rear face 36b of the third front wall 36. The third pillars 38 project from the third lower step face 39a and pass through the third lower passage 33 near the third upper end 38a. The third pillars 38 are connected to the fourth step 46 through the third front openings 32a and the third front passages 37.

[0130] The fourth step 49 has a fourth lower step face 49a perpendicular to the vertical direction Z, a fourth front step face 49b perpendicular to the transverse direction Y, a fourth upper step face 49c opposite the fourth lower step face 49a and a fourth rear step face 49d opposite the fourth front step face 49b. In the longitudinal direction X, the fourth step 49 extends between the first wall 112 and the second wall 122. In the illustrated embodiment, the concrete extends continuously between on the one hand the fourth step 49 and the first wall 112, passing through the inner wall of the first wall 114, and on the other hand between the fourth step 49 and the second wall 122, passing through the inner wall of the second wall 124.

[0131] The fourth lower step face 49b is in contact with the fourth lower wall 4. The fourth front step face 49b is in contact with the fourth rear face 46b of the fourth front wall 46. The fourth pillars 48 protrude from the fourth lower step face 49a and pass through the fourth lower passage 43 near the fourth upper end 48a.

[0132] The first upper step face 19b, the second upper step face 29b, the third upper step face 39b and the fourth upper step face 49b are successively offset relative to each other downwards in the vertical direction Z by one step p.

[0133] The first step 19, the second step 29, the third step 39 and the fourth step 49 each have, in the vertical direction Z, between the first lower step face 19a and the first upper step face 19c, a thickness of concrete advantageously between 100 millimeters and 150 millimeters.

[0134] Preferably, the raft 130 extends under the fourth lower edge 46d and is connected to the first pillar 18 by the first lower end 18b, to the second pillars 28 by the second lower ends 28b, to the third pillars 38 by the third lower ends 38b and to the fourth pillars 48 by the fourth lower ends 48b.

[0135] [Fig.8] illustrates an alternative embodiment of construction 200 forming a swimming pool in which the staircase 100 is straight. The first step 19, the second step 29, the third step 39 and the fourth step 49 then have a rectangular shape, perpendicular to the vertical direction Z. The first wall 112 and the second wall 122 extend in the transverse direction Y and are connected by a rear wall 132. The enclosure 210 further comprises a first wall portion 134 and a second wall portion 136 extending in the longitudinal direction X between which the staircase 100 is arranged.

[0136] Furthermore and separately, in [Fig.8], a liner 2 covers the first upper step face 19b, the second upper step face 29b, the third upper step face 39b and the fourth upper step face 49b, the first front face 16a, the second front face 26a, the third front face 36a and the fourth front face 46a. The liner 2 also covers the raft 130, the first wall portion 134, the first wall 112, the rear wall 132, the second wall 122 and the second wall portion 136 on their face intended to come into contact with the water of the swimming pool. The construction 200 illustrated in [Fig.6] preferably also comprises the liner 2, in a similar manner.

Claims

Claims

1. Device (1) for shuttering to produce a staircase comprising: at least one first pillar formwork (10) each delimiting a first pillar cavity (12) having a first upper opening (11), a first lower wall (14) and a first front wall (16) delimiting a first step cavity (15), the first front wall (16) being substantially perpendicular to the first lower wall (14), the first lower wall (14) has a first lower passage (13) arranged opposite the first upper opening (11) of each first pillar formwork (10), each first pillar cavity (12) communicating with the first step cavity (15) via the first upper opening (11) and the first lower passage (13), at least one second pillar formwork (20) each delimiting a second pillar cavity (22) having a second upper opening (21),a second lower wall (24) and a second front wall (26), the second lower wall (24) being parallel to the first lower wall (14), the second front wall (26) being parallel to the first front wall (16), the second lower wall (24), the first front wall (16) and the second front wall (26) delimit a second step cavity (25), the second lower wall (24) has a second lower passage (23) arranged opposite the second upper opening (21) of each second pillar formwork (20), each second pillar cavity (22) communicating with the second step cavity (25) via the second upper opening (21) and the second lower passage (23).,

2. Device according to claim 1 wherein: each first pillar formwork (10) comprises a front opening (12a), and the first front wall (16) comprises a front passage (17) arranged opposite the front opening (12a) of each first pillar formwork (10), each first pillar cavity (12) communicating with the second step cavity (25) via the first front opening (12a) and the first front passage (17).

3. Device according to the preceding claim in which each first pillar formwork (10) comprises a flat, supporting front face (10a) on the second front wall (26).

4. Device according to the preceding claim in which each first pillar formwork (10) has a triangular cross section.

5. An assembly (50) comprising the device according to any one of the preceding claims and reinforcement (8) extending into the first step cavity (15), the first pillar cavity (12) and the second step cavity (25) passing through the first lower passage (13), the first upper opening (11), the second lower passage (23) and the second upper opening (21).

6. Staircase (100) comprising: at least one first pillar (18), each first pillar (18) is surrounded by a first pillar formwork (10) and has a first upper end (18a), a first step (19), a first bottom wall (14) and a first front wall (16), the first step (19) has a first bottom step face (19a) and a first front step face (19b), the first bottom step face (19a) is in contact with the first bottom wall (14), the first bottom wall (14) has a first lower passage (13) through which the first upper end (18a) of each first pillar (18) is connected to the first step (19), the first front step face (19b) is in contact with the first front wall (16), at least one second pillar (28), each second pillar (28) is surrounded by a second pillar formwork (20) and has a second upper end (28a),a second step (29), a second bottom wall (24) and a second front wall (26), the second step (29) has a second bottom step face (29a), a second rear step face (29d) and a second front step face (29b), the second bottom step face (29a) is in contact with the second bottom wall (24), the second bottom wall (24) has a second lower passage (23) through which the second upper end (28a) of each second pillar (28) is connected to the second step (29), the second rear step face (29d) is in contact with the first front wall (16), the second front step face (29b) is in contact with the second front wall (26).,

7. Staircase according to the preceding claim in which the first pillar formwork (10), the second pillar formwork (20), the first wall lower wall (14), the second lower wall (24), the first front wall (16) and the second front wall (26) are made of wood or plastic material.

8. A construction (200) comprising a staircase according to any one of claims 6 or 7, a first wall (112) and a second wall (122), wherein the first step (19) and the second step (29) extend in a longitudinal direction (X) between the first wall (112) and the second wall (122).

9. A method for producing a staircase comprising the following operations: producing at least one first pillar formwork (10), each first pillar formwork (10) delimiting a first pillar cavity (12) having a first upper opening (11), producing a first step cavity (15), the first step cavity (15) communicating with each first pillar cavity (12) via the first upper opening (11), producing at least one second pillar formwork (20), each second pillar formwork (20) delimiting a second pillar cavity (22) having a second upper opening (21), producing a second step cavity (25), the second step cavity (25) communicating with each second pillar cavity (22) via the second upper opening (21), filling each first pillar cavity (12) with concrete,each first pillar cavity (12) communicating with the first step cavity (15) via each first upper opening (11), filling the first step cavity (15) with concrete, filling each second pillar cavity (22) with concrete, each second pillar cavity (22) communicating with the second step cavity (25) via each second upper opening (21), filling the second step cavity (25) with concrete.,

10. Method according to the preceding claim in which the production of each first pillar formwork (10) comprises the folding of a sheet (60) of plastic material.

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