FR2728608A1 - Plastic step assembly for swimming pool, made by roto-moulding - Google Patents

Plastic step assembly for swimming pool, made by roto-moulding Download PDF

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Publication number
FR2728608A1
FR2728608A1 FR9415984A FR9415984A FR2728608A1 FR 2728608 A1 FR2728608 A1 FR 2728608A1 FR 9415984 A FR9415984 A FR 9415984A FR 9415984 A FR9415984 A FR 9415984A FR 2728608 A1 FR2728608 A1 FR 2728608A1
Authority
FR
France
Prior art keywords
staircase
mould
assembly
furnace
skin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9415984A
Other languages
French (fr)
Other versions
FR2728608B1 (en
Inventor
Jean Louis Desjoyaux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Piscines Desjoyaux SA
Original Assignee
Piscines Desjoyaux SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Piscines Desjoyaux SA filed Critical Piscines Desjoyaux SA
Priority to FR9415984A priority Critical patent/FR2728608A1/en
Priority to PCT/FR1995/001694 priority patent/WO1996020322A1/en
Priority to AU44504/96A priority patent/AU4450496A/en
Publication of FR2728608A1 publication Critical patent/FR2728608A1/en
Application granted granted Critical
Publication of FR2728608B1 publication Critical patent/FR2728608B1/fr
Granted legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/06—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould about two or more axes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/14—Parts, details or accessories not otherwise provided for
    • E04H4/144—Means for facilitating access, e.g. step units or slides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/043—Skinned foam

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The step assembly is made together with a surrounding flange (1b) for joining it to adjacent panels of the pool to allow for the fitting of a sealing film. The flange from a U-shaped surround with ribs for the assembly of a liner together with seal and fixing strips. The assembly is produced by injecting into a mould of the required shape a very small quantity of powder, pref. of polyethylene or polypropylene to produce a very thin skin, and subjecting the mould to the action of a furnace while it is rotated in different directions. After removal from the furnace a powder of the same material as the skin, but with added expansion agents, is injected into the mould. This is followed by further furnace action and mould rotation to produce a cellular structure adjoining the thin film skin.

Description

Escalier pour bassin de Dlscine.  Staircase for Dlscine basin.

L'invention se rattache au secteur technique des accessoires de piscines. The invention relates to the technical sector of swimming pool accessories.

Très souvent, les bassins de piscine sont excécutés au moyen de panneaux indépendants préfabriqués, obtenus selon différents procédés. Ces panneaux sont assemblés entre eux, pour constituer le bassin de la piscine, qui peut être réalisé selon différentes formes géométriques. Un film étanche, plus connu sous le nom de liner, est monté en combinaison avec les différents panneaux1 pour assurer leur étanchéité. Very often, swimming pools are executed by means of independent prefabricated panels, obtained according to different processes. These panels are assembled together, to form the pool of the pool, which can be made in different geometric shapes. A waterproof film, better known as a liner, is mounted in combination with the various panels1 to ensure their watertightness.

On connait également des escaliers d'accès au bassin de la piscine, montés en combinaison avec les panneaux. La fabrication de ces escaliers, qui peuvent être de formes diverses, n'est pas adaptée à des cadences de productions industrielles et ne donnent pas totalement satisfaction au niveau des résultats obtenus. C'est le cas notamment pour les escaliers réalisés en polyester qui, en outre, est une matière qui vieillit mal. We also know stairs to the pool basin, mounted in combination with the panels. The manufacture of these staircases, which can be of various shapes, is not suited to industrial production rates and does not give complete satisfaction with the results obtained. This is particularly the case for stairs made of polyester which, moreover, is a material that ages poorly.

Pour remédier à ces inconvénients, on a proposé de réaliser des escaliers par thermoformage. Cette solution apporte des avantages importants par rapport à la technique polyester. Cependant, après l'opération de thermoformage en tant que telle, il est nécessaire de projeter sur l'arrière de l'escalier, un mélange de résine et de verre, après avoir appliqué un primaire d'adhérence, afin de rigidifier l'ensemble. To overcome these drawbacks, it has been proposed to produce stairs by thermoforming. This solution brings significant advantages compared to the polyester technique. However, after the thermoforming operation as such, it is necessary to spray on the back of the stairs, a mixture of resin and glass, after applying an adhesion primer, in order to stiffen the whole .

II est également nécessaire, après stratification et polymérisation totale, de détourer l'ensemble thermoformée à la forme exacte de l'escalier à obtenir.  It is also necessary, after stratification and total polymerization, to cut the thermoformed assembly to the exact shape of the staircase to be obtained.

Le problème que se propose de résoudre l'invention1 est de pouvoir obtenir un escalier directement prêt à l'emploi, en supprimant ou tout au moins, en réduisant d'une manière considérable, les opérations secondaires de finition, en ayant par ailleurs pour objectif, de pouvoir obtenir un escalier de petite ou de grande dimension, en faisant varier en conséquence, I'épaisseur, pour obtenir la rigidité suffisante. The problem which the invention proposes to solve1 is to be able to obtain a staircase directly ready for use, by eliminating or at least, by considerably reducing, the secondary finishing operations, while also having the objective , to be able to obtain a small or large staircase, by varying the thickness accordingly, to obtain sufficient rigidity.

Pour résoudre un tel problème, il a été conçu et mis au point un escalier pour bassin de piscine, qui est réalisé par rotomoulage en présentant des agencements de fixation avec des panneaux aptes à réaliser la structure du bassin et des moyens aptes à assurer le montage d'un film d'étanchéité avec les autres panneaux. To solve such a problem, a staircase for a swimming pool basin has been designed and developed, which is produced by rotational molding, with fixing arrangements with panels capable of producing the structure of the basin and means capable of ensuring assembly. a sealing film with the other panels.

Pour résoudre le problème posé d'assurer la fixation de l'escalier avec des panneaux adjacents1 tout en permettant le montage du film, I'escalier présente facialement, du coté des marches, des ailes délimitant un cadre en U. Les ailes présentent une nervure pour le montage du film en combinaison avec un joint d'étanchéité et bride de fixation. To solve the problem posed of securing the staircase with adjacent panels1 while allowing the mounting of the film, the staircase has facially, on the side of the steps, wings delimiting a U-shaped frame. The wings have a rib for mounting the film in combination with a seal and fixing flange.

L'invention est exposée, ci-après plus en détail à l'aide des dessins annexés, dans lesquels:
La figure 1 est une vue en coupe longitudinale du plan de moule pour le rotomoulage de l'escalier selon l'invention.The invention is set out below in more detail using the appended drawings, in which:
Figure 1 is a longitudinal sectional view of the mold plane for the rotational molding of the staircase according to the invention.

La figure 2 est une vue en plan correspondant à la figure 1. Figure 2 is a plan view corresponding to Figure 1.

La figure 3 est une vue de face de l'escalier. Figure 3 is a front view of the staircase.

La figure 4 est une vue partielle et en coupe considérée au droit de la nervure, pour le montage du liner.  Figure 4 is a partial sectional view seen in line with the rib, for mounting the liner.

L'escalier selon l'invention, est obtenu par rotomoulage. La figure 1 montre un moule (M) adapté pour obtenir l'escalier (1), dont la forme peut être quelconque et notamment semi-circulaire (figure 2). Le moule reçoit intérieurement une quantité déterminée de poudre de polyéthylène ou de polypropylène (PVC ou tout autre matière plastique rotomoulable), en fonction de l'épaisseur souhaitée. Le moule (M), disposé dans un four, est soumis à différents moyens aptes à le soumettre à des mouvements de rotation, considérés selon différents plans de l'espace, de manière à permettre à la poudre, d'adhérer sur les parois chauffées (M1) du moule, correspondant à la forme de l'escalier souhaitée. The staircase according to the invention is obtained by rotational molding. Figure 1 shows a mold (M) adapted to obtain the staircase (1), the shape of which can be arbitrary and in particular semi-circular (Figure 2). The mold internally receives a determined quantity of polyethylene or polypropylene powder (PVC or any other rotomouldable plastic material), depending on the desired thickness. The mold (M), placed in an oven, is subjected to various means capable of subjecting it to rotational movements, considered according to different planes of space, so as to allow the powder to adhere to the heated walls. (M1) of the mold, corresponding to the shape of the staircase desired.

Ce procédé de rotomoulage permet d'obtenir des escaliers de grandes dimensions. La face avant de l'escalier rotomoulé (1) présente facialement, du côté des marches (la), des ailes débordantes délimitant un cadre (1b) en forme de U. Les ailes verticales (1b1) et (1b2) peuvent elles mêmes présenter un rebord équerré pour l'assemblage par tout moyen connu et approprié de l'ensemble de l'escalier avec des panneaux adjacents (P), pour la construction de la piscine. This rotational molding process makes it possible to obtain large stairs. The front face of the rotomolded staircase (1) has, on the side of the steps (la), protruding wings delimiting a frame (1b) in the shape of a U. The vertical wings (1b1) and (1b2) may themselves have a squared edge for the assembly by any known and appropriate means of the whole of the staircase with adjacent panels (P), for the construction of the swimming pool.

Par ailleurs, ce cadre (lob) présente facialement, une nervure (lb3) pour le montage d'un film de protection étanche ou liner, en combinaison avec un joint d'étanchéité (2) et une bride de fixation (3). Pour assurer la fixation de l'ensemble de ces éléments, on équipe l'escalier au niveau du cadre (lob) et, du côté de sa face exteme, de tasseaux (4) en bois ou autre matière. Furthermore, this frame (lob) has a face (rb3) for mounting a waterproof protective film or liner, in combination with a seal (2) and a fixing flange (3). To secure all of these elements, the staircase is fitted at the level of the frame (lob) and, on the side of its outer face, battens (4) made of wood or other material.

Ces tasseaux sont fixés au moyen, par exemple, de vis (5) engagées dans l'épaisseur de la nervure (1b3). Dans le cas de tasseaux en bois, ce dernier est enrobé d'une matière thermorétractable (6). Ces tasseaux (4) font également office de supports de vissage au joint d'étanchéité (2), sur lequel prend appui le liner, non représenté, en combinaison avec la bride de serrage (3) (figure 4). These cleats are fixed by means, for example, of screws (5) engaged in the thickness of the rib (1b3). In the case of wooden battens, the latter is coated with a heat-shrinkable material (6). These cleats (4) also act as screwing supports for the seal (2), on which the liner, not shown, is supported, in combination with the clamp (3) (Figure 4).

Les avantages ressortent bien de la description, en particulier on souligne et on rappelle:
- la réalisation par rotomoulage de l'escalier permettant d'obtenir un produit d'un coût réduit en supprimant les opérations ultérieures de finition,
- le faible coût de la matière première en opposition à un mélange acrylique - polyester,
- les facteurs de productions accrus, compte de la possibilité de travailler en 4x8, avec un cycle d'automatisation complet,
- la robotisation possible pour la finition de l'escalier,
- la stabilité du matériau de base employé dans la technique de rotomoulage,
- la suppression des problèmes de rayures lors du transport et/ou du stockage de l'escalier, suite à l'absence de polyester qui est un matériau dur,
- la tenue dans le temps,
- la qualité de fabrication,
- la possibilité d'obtenir facilement différentes épaisseurs. The advantages clearly emerge from the description, in particular it is emphasized and recalled:
- the realization by rotational molding of the staircase to obtain a product of a reduced cost by eliminating the subsequent finishing operations,
- the low cost of the raw material in opposition to an acrylic - polyester mixture,
- increased production factors, account for the possibility of working in 4x8, with a complete automation cycle,
- possible robotization for finishing the staircase,
- the stability of the base material used in the rotational molding technique,
- the elimination of scratching problems during transport and / or storage of the staircase, due to the absence of polyester which is a hard material,
- resistance over time,
- the quality of manufacture,
- the possibility of easily obtaining different thicknesses.

Claims (2)

REVENDICATIONS -1- Escalier pour bassin de piscine, caractérisé en ce qu'il est réalisé par rotomoulage et présente des agencements de fixation (1 b) avec des panneaux adjacents pour réaliser la structure du bassin et des moyens aptes à assurer le montage d'un film d'étanchéité.-1- Staircase for a swimming pool, characterized in that it is made by rotational molding and has fixing arrangements (1b) with adjacent panels to make the structure of the basin and means capable of ensuring the mounting of a sealing film. -2- Escalier selon la revendication 1, caractérisé en ce qu'il présente facialement, du côté des marches (la), des ailes délimitant un cadre en U (lob) -3- Escalier selon la revendication 1, caractérisé en ce que les ailes présentent une nervure (lob3) pour le montage du liner en combinaison avec un joint d'étanchéité (2) et bride de fixation (3).-2- Staircase according to claim 1, characterized in that it has, on the side of the steps (la), wings delimiting a U-shaped frame (lob) -3- Staircase according to claim 1, characterized in that the wings have a rib (lob3) for mounting the liner in combination with a seal (2) and fixing flange (3). -4- Escalier selon la revendication 3, caractérisé en ce qu'il présente, au niveau du cadre (1 b) et du côté de sa face externe, des tasseaux (4) faisant office de support de fixation au joint d'étanchéité (2) en combinaison avec la bride (3).-4- Staircase according to claim 3, characterized in that it has, at the frame (1 b) and on the side of its outer face, cleats (4) acting as a fixing support for the seal ( 2) in combination with the flange (3). -5- Escalier selon la revendication 4, caractérisé en ce que les tasseaux sont fixées au moyen de vis engagées dans la nervure (1 b3) de cadre (1 b). -5- Staircase according to claim 4, characterized in that the cleats are fixed by means of screws engaged in the rib (1 b3) of frame (1 b).
FR9415984A 1994-12-26 1994-12-26 Plastic step assembly for swimming pool, made by roto-moulding Granted FR2728608A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR9415984A FR2728608A1 (en) 1994-12-26 1994-12-26 Plastic step assembly for swimming pool, made by roto-moulding
PCT/FR1995/001694 WO1996020322A1 (en) 1994-12-26 1995-12-19 Staircase for swimming-pool and its rotomolding process
AU44504/96A AU4450496A (en) 1994-12-26 1995-12-19 Staircase for swimming-pool and its rotomolding process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9415984A FR2728608A1 (en) 1994-12-26 1994-12-26 Plastic step assembly for swimming pool, made by roto-moulding

Publications (2)

Publication Number Publication Date
FR2728608A1 true FR2728608A1 (en) 1996-06-28
FR2728608B1 FR2728608B1 (en) 1997-03-07

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FR9415984A Granted FR2728608A1 (en) 1994-12-26 1994-12-26 Plastic step assembly for swimming pool, made by roto-moulding

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816594A2 (en) * 1996-07-02 1998-01-07 Acquagioca S.r.l. Demountable swimming-pool, of contained dimensions

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755981A (en) * 1972-01-24 1973-09-04 Cascade Ind Inc Swimming pool stairs
FR2595740A1 (en) * 1986-03-14 1987-09-18 Achdjean Patricia Device for steps which may be built into prefabricated swimming pool shells made of synthetic resins
FR2682418A1 (en) * 1991-10-10 1993-04-16 Dom Composit Sealing means for elements attached to the walls of a pool (swimming pool), and elements provided with such means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755981A (en) * 1972-01-24 1973-09-04 Cascade Ind Inc Swimming pool stairs
FR2595740A1 (en) * 1986-03-14 1987-09-18 Achdjean Patricia Device for steps which may be built into prefabricated swimming pool shells made of synthetic resins
FR2682418A1 (en) * 1991-10-10 1993-04-16 Dom Composit Sealing means for elements attached to the walls of a pool (swimming pool), and elements provided with such means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816594A2 (en) * 1996-07-02 1998-01-07 Acquagioca S.r.l. Demountable swimming-pool, of contained dimensions
EP0816594A3 (en) * 1996-07-02 1998-05-20 Acquagioca S.r.l. Demountable swimming-pool, of contained dimensions

Also Published As

Publication number Publication date
FR2728608B1 (en) 1997-03-07

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