CH266461A

CH266461A - Soft tube.

Info

Publication number: CH266461A
Authority: CH
Inventors: Etablissements Marret Anonyme
Original assignee: Marret Bonnin Lebel & Guieu So
Priority date: 1939-11-14
Filing date: 1947-10-13
Publication date: 1950-01-31

Description

Tube souple. Il est dejä connu que Fon peut realiser des tubes ou gaines souples par enroulement d'un ou de plusieurs profiles metalliques dis- poses de fagon que les spires soient liees entre elles par emboitement de ces profiles. Soft tube. It is already known that Fon can produce tubes or flexible sheaths by winding one or more metal profiles arranged in such a way that the turns are linked together by interlocking these profiles.

Les fig. 1 et 2 montrent, ä titre d'exem- ple, deux coupes longitudinales de deux tubes connus. Figs. 1 and 2 show, by way of example, two longitudinal sections of two known tubes.

Le tube represente sur la fig. 1 est consti- tue par deux profiles cc et b en U. Le tube represente sur la fig. 2 est constitue d'un seul profile en$. The tube represented in fig. 1 is made up of two U-shaped profiles cc and b. The tube represented in fig. 2 consists of a single $ profile.

Tous ces tubes connus presentent divers inconvenients, no@tamment ils offrent une re- sistance reduite ä la traction comme ä la Flexion: Lorsque les sollicitations deviennent trop Brandes, ]es profiles se deforment et se deboitent. All these known tubes have various disadvantages, in particular they offer reduced resistance to traction as well as to bending: When the stresses become too strong, the profiles deform and dislocate.

Enfin, si Fon veut couder 1e tube pour une deviation tres marquee an risque de de- boiter les profiles, meme si Fon agit de fa#,on tres progressive. Finally, if Fon wants to bend the tube for a very marked deviation at the risk of dislodging the profiles, even if Fon acts very progressively.

La presente Invention a pour but. d'eviter ces inconvenierits; elle concerne un tube sou- ple constitue par 1'enroulement d'au moins un profile dispose de fa@on que les spires s'em- boitent les unes Jans les autres et caraeterise par ce que les Bor ds du profile sont recourbes en forme de crochets, pour empecher 1e deboi- teinent des spires par les efforts de traction ou de flexion exerces sur 1e tube. The present invention aims. to avoid these inconveniences; it relates to a flexible tube constituted by the winding of at least one profile arranged in such a way that the turns fit together and is characterized by the fact that the edges of the profile are curved in the shape hooks, to prevent the 1st dislodging of the turns by the tensile or bending forces exerted on the 1st tube.

L'invention coneerne egaleinent un pro- cAd6 de fabrication d'un tel tobe souple pro- rede caracterise par ce que au moins un pro f'ile comportant des Bords recourbes en forme de erochets ä peine amorces est enroule sur un mandr in, puis ecrase entre ce ma.ndrin et une surface exterieure au tube pour terminer la Formation des crochets 6bauches, et de facon que les crochets de deux spires successives penetrent 1'un dans 1'autre. Ce procecle per- met la fabrication du tube en Brandes lon- gueurs. The invention also relates to a process for manufacturing such a clean flexible tube characterized in that at least one profile comprising curved edges in the form of barely started hooks is rolled up on a mandrel, then crushed between this ma.ndrin and a surface outside the tube to complete the formation of the 6bauches hooks, and so that the hooks of two successive turns penetrate one into the other. This process allows the manufacture of the tube in long lengths.

Differentes realisations de tubes suivant 1'invention sont representees, ä titre d'exem- ple, sur les dessins ei-joints, dans lesquels: La fig. 3 est une vue perspective dun tobe nietallique souple. Different embodiments of tubes according to the invention are shown, by way of example, in the accompanying drawings, in which: FIG. 3 is a perspective view of a flexible metallic tube.

La fig. .1 est une coupe longitudinale du meme tube. fig. .1 is a longitudinal section of the same tube.

La fig. 5 pst une coupe longitudinale Jan autre tube avec des profiles differents. fig. 5 pst a longitudinal section Jan another tube with different profiles.

Les fig. 6 et 7 montrent deux pliases de 1'operation de ferineture des crochets d'un tobe conformement au procede de 1'invention. Figs. 6 and 7 show two pliases of the operation of closing the hooks of a tobe in accordance with the method of the invention.

Le RTI ID="0001.0273" WI="7" HE="4" LX="1164" LY="1848"> tube represente sur les fig. 3, 4, 6 et 7 est constitue par deux profiles a etb en U enroules 1'un sur 1'autre, les U se faisant face de fa@on que 1e profi16 cr enserre entre ses cötes c deux cötes d du profile b et inver- sement. The RTI ID="0001.0273" WI="7" HE="4" LX="1164" LY="1848"> tube shown in Figs. 3, 4, 6 and 7 is made up of two profiles a and b in U rolled up one on the other, the U facing each other so that the profile cr encloses between its sides c two sides d of profile b and vice versa.

Les extremites c et d des cötes des profiles n. et b comportent des Bords recourbes en. forme de erochets c et f einboites 1'un dans 1'autre et qui assurent une resistance excep- tionnelle du tube tunt ä 1a, traetion qu'ä la flexion. Grâce à ces crochets, qui ont ten dance, en cas de flexion du tube, à s'accrocher de plus en plus intimement l'un à l'autre dans la partie extérieure de la courbe du tube, on peut donner audit tube des courbures très prononcées sans provoquer le déboîtement des spires du tube ni l'aplatissement ou la défor mation de la section du tube. The extremities c and d of the sides of the profiles n. and b have curved edges. form of hooks c and nested one inside the other and which ensure exceptional resistance of the tunt tube to 1a, traetion and bending. Thanks to these hooks, which have a tendency, in the event of bending of the tube, to cling more and more intimately to each other in the outer part of the curve of the tube, it is possible to give said tube curvatures very pronounced without causing the dislocation of the turns of the tube or the flattening or deformation of the section of the tube.

Le tube représenté sur la fig. 5 diffère des précédents par la forme du profilé exté rieur a qui est cette fois de forme arrondie. D'autres formes peuvent d'ailleurs être adop tées. The tube represented in fig. 5 differs from the previous ones by the shape of the outer section a which this time is rounded. Other forms can also be adopted.

Tous ces tubes souples peuvent être ren dus étanches ou isolants à. l'aide d'un tube auxiliaire élastique en matière étanche ou isolante monté soit à l'intérieur, soit à l'exté rieur du tube principal souple. Le tube souple de la fig. 5, par exemple, comporte un tube interne 2 en caoutchouc. All these flexible tubes can be made waterproof or insulated. using an elastic auxiliary tube of waterproof or insulating material mounted either inside or outside the flexible main tube. The flexible tube of fig. 5, for example, comprises an inner tube 2 made of rubber.

Tous ces tubes souples peuvent également dans un but d'étanchéité ou d'isolement, être enduits ou vernis. All these flexible tubes can also, for sealing or insulation purposes, be coated or varnished.

Un exemple de réalisation du procédé de fabrication conforme à l'invention est sché matisé sur les fig. 6 et 7. Les profilés com portent des crochets e et f à peine amorcés; ils sont ensuite enroulés convenablement sur un mandrin g, tel qu'indiqué fig. 6. An exemplary embodiment of the manufacturing method according to the invention is sketched in FIGS. 6 and 7. The sections have hooks e and f just started; they are then suitably rolled up on a mandrel g, as indicated in fig. 6.

On presse ensuite le tube entre le mandrin g et une surface appropriée telle que la mo lette 1z, par exemple; les crochets e du profilé b viennent en contact avec le fond j du pro filé a et inversement les crochets f du profilé a viennent en contact avec le fond 7c du pro filé b; les crochets sont ainsi refermés sous l'effet de la pression et aecrochés l'un dans l'autre. The tube is then pressed between the mandrel g and a suitable surface such as the mo lette 1z, for example; the hooks e of profile b come into contact with the bottom j of profile a and conversely the hooks f of profile a come into contact with the bottom 7c of profile b; the hooks are thus closed under the effect of the pressure and hooked into each other.

Les tubes conformes à l'invention peuvent trouver de multiples utilisations en particu lier comme gaines pour protéger les câbles de commande, conducteurs électriques et comme canalisation élastique pour huile, etc. The tubes in accordance with the invention can find many uses, in particular as sheaths for protecting control cables, electrical conductors and as elastic pipes for oil, etc.

Claims

CLAIMS: I. Flexible tube formed by the winding of at least one profile arranged so that the successive turns fit into each other and characterized in that the edges of the profile are curved in the form of hooks, for prevent dislocation of the turns during traction and. tube bending. II. Process for the manufacture of a flexible tube according to claim I, characterized in that at least one profile comprising curved edges in the form of barely started hooks is wound on a mandrel, then crushed between this mandrel and a surface external to the tube to complete the formation of the hooks so that the hooks of two successive turns penetrate one into the other. SUB-CLAIMS 1. Flexible tube according to: Claim I, characterized in that it is made tight with the aid of an auxiliary elastic tube mounted inside the winding of the flexible tube.

2. Flexible tube according to claim I, characterized in that it is made tight by an elastic auxiliary tube mounted outside the winding.

3. Soft tube in accordance with the. claim I, characterized in that it is made insulating by an elastic auxiliary tube mounted inside the winding.

4. Flexible tube according to claim T, characterized in that it is rendered insulating by an elastic auxiliary tube mounted on the outside of the winding.

5. Flexible tube according to claim I, characterized in that it is made waterproof by a coating.

6. Flexible tube according to claim T, characterized in that it is rendered insulating by a coating.