EP0811725B1 - Guiding apparatus for one or more flexible tubes at the end of an articulated arm of a lifting apparatus - Google Patents

Guiding apparatus for one or more flexible tubes at the end of an articulated arm of a lifting apparatus Download PDF

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Publication number
EP0811725B1
EP0811725B1 EP19970401223 EP97401223A EP0811725B1 EP 0811725 B1 EP0811725 B1 EP 0811725B1 EP 19970401223 EP19970401223 EP 19970401223 EP 97401223 A EP97401223 A EP 97401223A EP 0811725 B1 EP0811725 B1 EP 0811725B1
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EP
European Patent Office
Prior art keywords
boom
hose
mast
support member
axis
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.)
Expired - Lifetime
Application number
EP19970401223
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German (de)
French (fr)
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EP0811725A1 (en
Inventor
Philippe Chagnot
Jean-Claude Riglet
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Compagnie du Sol SARL
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Compagnie du Sol SARL
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Publication of EP0811725A1 publication Critical patent/EP0811725A1/en
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Publication of EP0811725B1 publication Critical patent/EP0811725B1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/22—Component parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines

Definitions

  • the present invention relates to a device for guiding one or more several hoses at the end of an articulated mast of a lifting device and a lifting device provided with such a device, in particular for digging trenches in the ground.
  • This appliance has an articulated mast at the top end of which is suspended a chassis by cables. Milling drums, mounted on the lower part of the chassis, are rotated and disintegrate the ground by allowing the chassis to descend into the ground to carry out the excavation.
  • a hose connected to the chassis allows the spoils to be raised from the vicinity of the milling drums to the ground surface.
  • the hose extends vertically from the chassis to the end high of the articulated mast where it curves to extend substantially parallel to the mast, up to a reel with horizontal axis located next to the mast.
  • a guide device is provided for give the hoses a progressive curvature limiting, as far as possible, excessive stress on the hoses.
  • the hoses when the mast is in the low position substantially horizontal, the hoses go from a vertical orientation to a horizontal orientation by winding on the guide device at the end of the mast about a quarter of a turn, that is 90 °, while, when the mast is in high position while being inclined by approximately 45 ° with respect to the horizontal, the hoses move from a vertical orientation to a 45-degree tilted orientation wrapping around three-eighths of a turn, or 135 °, on the guide.
  • the guide device 1 must extend over 135 ° so as to properly support the hose 2 when the mast 3 is found in high position.
  • the hose 2 no longer winds up more than 90 ° on the guide device 1, which then comprises an unnecessary portion of 45 ° s' extending downwards, which hinders reassembly of the chassis 4.
  • the chassis 4 can therefore only go up to a distance h from the mast 3.
  • a device has hitherto been used guide 1 'shown in Figure 3, which is dimensioned so that it does not extends only over a quarter of a turn, i.e. 90 °, which allows the chassis to be reassembled 4 as much as possible without it coming up against the lower part of the guide device 1 'when the mast 2 is in a horizontal position.
  • the hose 2 is poorly guided, because the guide device 1 'is not tangent at the vertical part of the hose 2, which causes the hose C to break, and usually premature wear of the hose.
  • the present invention provides a device for guiding hoses, which solves the above mentioned problems and which is particularly simple and economic.
  • the subject of the present invention is a device for guiding at least a hose at the end of a mast articulated around a first articulation axis fixed, said flexible tube comprising a part extending along the mast and a part dipping down from the end of the mast, the device comprising a support member arranged at the end of the mast to support the hose in it conferring a curvature capable of preventing any breakage of said hose at least in low mast position, characterized in that the support member extends over a sufficient length to support the hose in the highest mast position without said hose breaking and by the fact that the support member is mounted pivoting on the one hand on the mast around a first axis of articulation and on the other hand on a rigid connection means around a second articulation axis, said means rigid link itself being articulated around a second fixed articulation axis, the first and second fixed axes of articulation and the first and second axes of pivoting being located at the four vertices of a deformable
  • the guide device comprises a support member which has the length necessary to support suitably the hose (s) without breaking even when the mast is in the high position, but due to the fact that this support member remains parallel to itself, there does not occur the disadvantage that when the mast is in the low position, the support member protrudes at the bottom of the mast and hinders reassembly of the chassis to which the hoses are connected.
  • the support member of the device according to the invention has, of course, an excess portion which does not support the flexible, but this excess portion is found in the upper part of the device and does not interfere with the reassembly of the chassis.
  • the device according to the invention ensures proper guidance of the hoses and does not cause any discomfort during reassembly of the chassis.
  • the support member is mounted on the mast so that its excess portion, in the sense defined above, penetrates the thickness of the mast when the mast is in the low position.
  • the means of rigid connection which connects the support member to the second articulation axis is constituted by a bar substantially the same length as the mast, which extends parallel to the latter.
  • the support member is of the roller type, that is to say that it has a succession of rollers with axes parallel to each other and perpendicular to the axis of the hose, said rollers being arranged, seen from the side, in a arc.
  • the present invention also relates to a lifting device provided with a device as described above and in particular a lifting device for digging trenches in the ground using milling drums of the type comprising a platform supported by a running gear, a lifting mast articulated on the platform, a chassis suspended from the high end of the mast, rotational milling drums mounted at the bottom of the chassis, at least one reel with horizontal axis located on the platform next to the mast, supporting a hose for raising the cuttings from the vicinity of the drums milling to the ground surface and one or more hydraulic hoses, said hoses extending from the upper part of the chassis to the reel being vertical between the chassis and the high end of the mast and parallel to the axis of the mast between the high end of the mast and the reel, characterized in that it further includes a guide device as described above at the end high of the mast to give the hoses an appropriate curvature preventing any breakage of these at the high end of the mast.
  • the set of rollers 5, of which figure SA provides a sectional view of a roller and which constitutes a support member within the meaning of the invention, is mounted at the high end of the mast 6 around a pivot axis 7 substantially horizontal and perpendicular to the longitudinal axis of the mast.
  • the support member 5 is preferably constituted by two plates parallels 5a between which are fixed axes on which are mounted the rolls 5b themselves.
  • the axes of the rollers 5b are arranged, projected onto the plates 5a, in an arc.
  • the mast 6 is itself articulated on a base 8 secured to a platform 9, around an axis 10 of articulation parallel to the axis 7.
  • a rigid bar 11 is articulated around an axis hinge 12, parallel to axes 7 and 10.
  • the bar 11 has substantially the same length as mast 6.
  • the bar 11 is connected to the assembly of rollers 5 by a pivot axis 13 parallel to axes 7, 10 and 12.
  • the four axes 7, 10, 12 and 13 are located to the four vertices of a parallelogram, so that during movements inclination of the mast, the plane containing axes 7 and 13 remains parallel to the linked plane to base 8 and defined by axes 10 and 12.
  • roller assembly 5 remains parallel to itself whatever the inclination of the mast 6.
  • the flexible 2 is wound on 135 ° on the roller assembly, which is tangent to the flexible in the vertical part and in the part parallel to the mast of said flexible.
  • roller assembly 5 When the mast is horizontal, as shown in Figure 6, the roller assembly 5 is always tangent to the hose, in the vertical part and in the horizontal part of the latter but an upper part of the whole of rollers 5, which extends over 45 °, is not used for guiding the hose.
  • the device according to the invention is able to guide the flexible by giving it a progressive curvature capable of preserving it from any premature wear, while keeping the compactness of the lifting device on which it is installed.
  • FIGS. 7 and 8 show an example of an apparatus for dig trenches in the ground using a guide device according to the invention.
  • This device comprises a running gear 14 on which rests a platform 15 supporting a reel with horizontal axis 16, a base 17 and thrust cylinders 18 which act on a mast 19 articulated on the base 17.
  • a set of rollers 20 with horizontal axes parallel to each other and arranged substantially in an arc is pivotally mounted at the end of the mast remote from the reel 16, being connected to the base 17 by a metal bar rigid 21 pivotally mounted on the one hand to said set of rollers 20 and on the other hand at base 17.
  • FIG. 7 the reference numbers 7, 10, 12, 13 are plotted. corresponding to the pivot and articulation axes of Figures 5 and 6.
  • the mast and the bar are dimensioned and positioned so that constitute the two opposite sides of a deformable parallelogram by which the rollers 20 remain parallel itself.
  • roller assembly enters tangentially in contact with the two parts of the hose located on the side and on the other of said set of rollers.
  • the hose rests on the entire length of the set of rollers, approximately 135 °.
  • the assembly of rollers has an excess portion which is located in the thickness of the mast and does not hinder the reassembly of the chassis (not shown).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Jib Cranes (AREA)

Description

La présente invention concerne un dispositif de guidage d'un ou plusieurs flexibles à l'extrémité d'un mât articulé d'un appareil de levage et un appareil de levage muni d'un tel dispositif, notamment pour creuser des tranchées dans le sol.The present invention relates to a device for guiding one or more several hoses at the end of an articulated mast of a lifting device and a lifting device provided with such a device, in particular for digging trenches in the ground.

La société demanderesse a déjà décrit, dans son brevet français 92 12046 publié sous le n° 2 696 767, un appareil pour creuser des tranchées dans le sol.The applicant company has already described, in its French patent 92 12046 published under No. 2,696,767, an apparatus for digging trenches in floor.

Cet appareil comporte un mât articulé à l'extrémité haute duquel est suspendu un châssis par l'intermédiaire de câbles. Des tambours de fraisage, montés à la partie inférieure du châssis, sont entraínés en rotation et désagrègent le terrain en permettant au châssis de descendre dans le sol pour réaliser l'excavation.This appliance has an articulated mast at the top end of which is suspended a chassis by cables. Milling drums, mounted on the lower part of the chassis, are rotated and disintegrate the ground by allowing the chassis to descend into the ground to carry out the excavation.

Un flexible raccordé au châssis permet de remonter les déblais depuis le voisinage des tambours de fraisage jusqu'à la surface du sol.A hose connected to the chassis allows the spoils to be raised from the vicinity of the milling drums to the ground surface.

Le flexible s'étend verticalement depuis le châssis jusqu'à l'extrémité haute du mât articulé où il se courbe pour s'étendre sensiblement parallèlement au mât, jusqu'à un enrouleur à axe horizontal situé à côté du mât.The hose extends vertically from the chassis to the end high of the articulated mast where it curves to extend substantially parallel to the mast, up to a reel with horizontal axis located next to the mast.

D'autres flexibles hydrauliques, qui alimentent le châssis, suivent le même chemin entre ledit châssis et des enrouleurs situés à côté du mât.Other hydraulic hoses, which supply the chassis, follow the same path between said chassis and reels located next to the mast.

A l'extrémité haute du mât, un dispositif de guidage est prévu pour conférer aux flexibles une courbure progressive limitant, dans la mesure du possible, de trop fortes sollicitations des flexibles.At the upper end of the mast, a guide device is provided for give the hoses a progressive curvature limiting, as far as possible, excessive stress on the hoses.

Du fait que le mât est articulé de manière à pouvoir monter et descendre, c'est-à-dire en changeant d'inclinaison, on comprend que les flexibles se courbent sur un tronçon de longueur variable qui croít avec la hauteur à laquelle se trouve l'extrémité haute du mât.The fact that the mast is articulated so that it can be raised and go down, that is to say by changing the inclination, we understand that the hoses bend over a section of variable length which increases with the height at which is the high end of the mast.

En d'autres termes, lorsque le mât se trouve en position basse sensiblement horizontale, les flexibles passent d'une orientation verticale à une orientation horizontale en s'enroulant sur le dispositif de guidage à l'extrémité du mât sur environ un quart de tour, soit 90°, tandis que, lorsque le mât est en position haute en étant incliné d'environ 45° par rapport à l'horizontale, les flexibles passent d'une orientation verticale à une orientation inclinée à 45 degrés en s'enroulant sur environ trois huitièmes de tour, soit 135°, sur le dispositif de guidage.In other words, when the mast is in the low position substantially horizontal, the hoses go from a vertical orientation to a horizontal orientation by winding on the guide device at the end of the mast about a quarter of a turn, that is 90 °, while, when the mast is in high position while being inclined by approximately 45 ° with respect to the horizontal, the hoses move from a vertical orientation to a 45-degree tilted orientation wrapping around three-eighths of a turn, or 135 °, on the guide.

On comprend que, pour assurer un bon guidage des flexibles, il faut que le dispositif de guidage entre en contact avec les flexibles de façon tangentielle, à la fois dans la partie verticale des flexibles et dans leur partie parallèle au mât.It is understood that, to ensure good guidance of the hoses, it is necessary the guide device comes into contact with the hoses so tangential, both in the vertical part of the hoses and in their part parallel to the mast.

A cet effet, comme on le voit sur la figure 1, où un seul flexible a été représenté pour la clarté du dessin, il faut que le dispositif de guidage 1 s'étende sur 135° de manière à supporter convenablement le flexible 2 lorsque le mât 3 se trouve en position haute.For this purpose, as seen in Figure 1, where only one hose was shown for clarity of the drawing, the guide device 1 must extend over 135 ° so as to properly support the hose 2 when the mast 3 is found in high position.

Mais pour les autres positions du mât, et notamment dans sa position horizontale représentée sur la figure 2, le flexible 2 ne s'enroule plus que sur 90° sur le dispositif de guidage 1, lequel comporte alors une portion inutile de 45° s'étendant vers le bas, qui gêne le remontage du châssis 4. Le châssis 4 ne peut donc remonter que jusqu'à une distance h du mât 3.But for the other positions of the mast, and in particular in its horizontal position shown in FIG. 2, the hose 2 no longer winds up more than 90 ° on the guide device 1, which then comprises an unnecessary portion of 45 ° s' extending downwards, which hinders reassembly of the chassis 4. The chassis 4 can therefore only go up to a distance h from the mast 3.

Si un tel écartement du châssis par rapport au mât est acceptable sur des appareil de forage de grandes dimensions, il en va différemment sur des appareils compacts dont on cherche à réduire au maximum l'encombrement en hauteur.If such a spacing of the chassis relative to the mast is acceptable on large drilling rigs, it is different on compact devices which are sought to reduce the overall size by height.

Pour éviter cet inconvénient, on a utilisé jusqu'à présent un dispositif de guidage 1' représenté sur la figure 3, qui est dimensionné de manière qu'il ne s'étende que sur un quart de tour, soit 90°, ce qui permet de remonter le châssis 4 au maximum sans qu'il vienne buter contre la partie basse du dispositif de guidage 1' lorsque le mât 2 se trouve en position horizontale.To avoid this drawback, a device has hitherto been used guide 1 'shown in Figure 3, which is dimensioned so that it does not extends only over a quarter of a turn, i.e. 90 °, which allows the chassis to be reassembled 4 as much as possible without it coming up against the lower part of the guide device 1 'when the mast 2 is in a horizontal position.

Cependant, pour les autres positions du mât, comme on le voit sur la figure 4, le flexible 2 est mal guidé, car le dispositif de guidage 1' n'est pas tangent à la partie verticale du flexible 2, ce qui occasionne une cassure C du flexible, et généralement une usure prématurée du flexible.However, for the other mast positions, as seen on the Figure 4, the hose 2 is poorly guided, because the guide device 1 'is not tangent at the vertical part of the hose 2, which causes the hose C to break, and usually premature wear of the hose.

La présente invention propose un dispositif de guidage de flexibles, qui résout les problèmes mentionnés ci-dessus et qui est particulièrement simple et économique.The present invention provides a device for guiding hoses, which solves the above mentioned problems and which is particularly simple and economic.

La présente invention a pour objet un dispositif de guidage d'au moins un flexible à l'extrémité d'un mât articulé autour d'un premier axe d'articulation fixe, ledit flexible comprenant une partie s'étendant le long du mât et une partie plongeant vers le bas depuis l'extrémité du mât, le dispositif comportant un organe-support agencé à l'extrémité du mât pour supporter le flexible en lui conférant une courbure propre à éviter toute cassure dudit flexible au moins en position basse du mât, caractérisé par le fait que l'organe-support s'étend sur une longueur suffisante pour supporter le flexible dans la position la plus haute du mât sans que ledit flexible se casse et par le fait que l'organe-support est monté pivotant d'une part sur le mât autour d'un premier axe d'articulation et d'autre part sur un moyen de liaison rigide autour d'un second axe d'articulation, ledit moyen de liaison rigide étant lui-même articulé autour d'un second axe d'articulation fixe, les premier et second axes d'articulation fixes et les premier et second axes de pivotement étant situés aux quatre sommets d'un parallélogramme déformable, de sorte que l'organe-support demeure parallèle à lui-même lors des mouvements du mât.The subject of the present invention is a device for guiding at least a hose at the end of a mast articulated around a first articulation axis fixed, said flexible tube comprising a part extending along the mast and a part dipping down from the end of the mast, the device comprising a support member arranged at the end of the mast to support the hose in it conferring a curvature capable of preventing any breakage of said hose at least in low mast position, characterized in that the support member extends over a sufficient length to support the hose in the highest mast position without said hose breaking and by the fact that the support member is mounted pivoting on the one hand on the mast around a first axis of articulation and on the other hand on a rigid connection means around a second articulation axis, said means rigid link itself being articulated around a second fixed articulation axis, the first and second fixed axes of articulation and the first and second axes of pivoting being located at the four vertices of a deformable parallelogram, of so that the support member remains parallel to itself during the movements of the mast.

En d'autres termes, le dispositif de guidage selon l'invention comporte un organe-support qui présente la longueur nécessaire pour supporter convenablement le ou les flexibles sans que ceux-ci se cassent même lorsque le mât se trouve en position haute, mais du fait que cet organe-support demeure parallèle à lui-même, il ne se produit pas l'inconvénient selon lequel, lorsque le mât se trouve en position basse, l'organe-support dépasse en partie inférieure du mât et gêne le remontage du châssis auquel sont reliés les flexibles.In other words, the guide device according to the invention comprises a support member which has the length necessary to support suitably the hose (s) without breaking even when the mast is in the high position, but due to the fact that this support member remains parallel to itself, there does not occur the disadvantage that when the mast is in the low position, the support member protrudes at the bottom of the mast and hinders reassembly of the chassis to which the hoses are connected.

En effet, en position horizontale du mât, l'organe-support du dispositif selon l'invention présente, certes, une portion excédentaire qui ne supporte pas les flexibles, mais cette portion excédentaire se trouve en partie supérieure du dispositif et ne gêne aucunement le remontage du châssis.Indeed, in the horizontal position of the mast, the support member of the device according to the invention has, of course, an excess portion which does not support the flexible, but this excess portion is found in the upper part of the device and does not interfere with the reassembly of the chassis.

Ainsi, quelle que soit la position du mât, le dispositif selon l'invention assure un guidage convenable des flexibles et n'occasionne aucune gêne lors du remontage du châssis.Thus, whatever the position of the mast, the device according to the invention ensures proper guidance of the hoses and does not cause any discomfort during reassembly of the chassis.

Dans un mode de réalisation préféré de l'invention, l'organe-support est monté sur le mât de manière que sa portion excédentaire, au sens défini ci-dessus, pénètre dans l'épaisseur du mât lorsque le mât se trouve en position basse.In a preferred embodiment of the invention, the support member is mounted on the mast so that its excess portion, in the sense defined above, penetrates the thickness of the mast when the mast is in the low position.

Dans un mode de réalisation particulier de l'invention, le moyen de liaison rigide qui relie l'organe-support au second axe d'articulation est constitué par une barre sensiblement de même longueur que le mât, qui s'étend parallèlement à ce dernier.In a particular embodiment of the invention, the means of rigid connection which connects the support member to the second articulation axis is constituted by a bar substantially the same length as the mast, which extends parallel to the latter.

De préférence, l'organe-support est du type à rouleaux, c'est-à-dire qu'il possède une succession de rouleaux d'axes parallèles entre eux et perpendiculaires à l'axe du flexible, lesdits rouleaux étant disposés, vus de côté, suivant un arc de cercle.Preferably, the support member is of the roller type, that is to say that it has a succession of rollers with axes parallel to each other and perpendicular to the axis of the hose, said rollers being arranged, seen from the side, in a arc.

La présente invention a également pour objet un appareil de levage muni d'un dispositif tel que décrit ci-dessus et notamment un appareil de levage pour creuser des tranchées dans le sol à l'aide de tambours de fraisage du type comportant une plate-forme supportée par un train de roulement, un mât de levage articulé sur la plate-forme, un châssis suspendu à l'extrémité haute du mât, des tambours de fraisage entraínés en rotation montés à la partie inférieure du châssis, au moins un enrouleur à axe horizontal situé sur la plate-forme à côté du mât, supportant un flexible pour remonter les déblais depuis le voisinage des tambours de fraisage jusqu'à la surface du sol et un ou plusieurs flexibles hydrauliques, lesdits flexibles s'étendant depuis la partie supérieure du châssis jusqu'à l'enrouleur en étant verticaux entre le châssis et l'extrémité haute du mât et parallèles à l'axe du mât entre l'extrémité haute du mât et l'enrouleur, caractérisé par le fait qu'il comporte en outre un dispositif de guidage tel que décrit ci-dessus à l'extrémité haute du mât pour conférer aux flexibles une courbure appropriée évitant toute cassure de ces derniers au niveau de l'extrémité haute du mât.The present invention also relates to a lifting device provided with a device as described above and in particular a lifting device for digging trenches in the ground using milling drums of the type comprising a platform supported by a running gear, a lifting mast articulated on the platform, a chassis suspended from the high end of the mast, rotational milling drums mounted at the bottom of the chassis, at least one reel with horizontal axis located on the platform next to the mast, supporting a hose for raising the cuttings from the vicinity of the drums milling to the ground surface and one or more hydraulic hoses, said hoses extending from the upper part of the chassis to the reel being vertical between the chassis and the high end of the mast and parallel to the axis of the mast between the high end of the mast and the reel, characterized in that it further includes a guide device as described above at the end high of the mast to give the hoses an appropriate curvature preventing any breakage of these at the high end of the mast.

Dans le but de mieux faire comprend l'invention, on va en décrire maintenant des modes de réalisation donnés à titre d'exemples non limitatifs en référence au dessin annexé dans lequel :

  • les figures 1 à 4, qui ont déjà été décrites, sont des vues schématiques permettant de bien comprendre le problème technique que la présente invention cherche à résoudre,
  • les figures 5 et 6 sont des vues schématiques en élévation, analogues aux figures 1 à 4, du dispositif selon l'invention,
  • la figure 5A est une vue en coupe selon la ligne VA-VA de la figure 5.
  • les figures 7 et 8 sont des vues schématiques, en élévation d'un dispositif selon un mode de réalisation de l'invention.
In order to better understand the invention, we will now describe embodiments given by way of nonlimiting examples with reference to the accompanying drawing in which:
  • FIGS. 1 to 4, which have already been described, are schematic views allowing a good understanding of the technical problem which the present invention seeks to solve,
  • FIGS. 5 and 6 are schematic elevation views, similar to FIGS. 1 to 4, of the device according to the invention,
  • FIG. 5A is a sectional view along the line VA-VA of FIG. 5.
  • Figures 7 and 8 are schematic views, in elevation of a device according to an embodiment of the invention.

Sur le dessin, on n'a représenté qu'un seul flexible dans un but de clarté.In the drawing, only one hose has been shown for the purpose of clarity.

La représentation schématique du dispositif selon l'invention donnée aux figures 5 et 6 permet de bien comprendre le principe de fonctionnement de ce dispositif.The schematic representation of the device according to the invention given Figures 5 and 6 allows you to understand the operating principle of this device.

L'ensemble de rouleaux 5, dont la figure SA fournit une vue en coupe d'un rouleau et qui constitue un organe-support au sens de l'invention, est monté à l'extrémité haute du mât 6 autour d'un axe de pivotement 7 sensiblement horizontal et perpendiculaire à l'axe longitudinal du mât.The set of rollers 5, of which figure SA provides a sectional view of a roller and which constitutes a support member within the meaning of the invention, is mounted at the high end of the mast 6 around a pivot axis 7 substantially horizontal and perpendicular to the longitudinal axis of the mast.

L'organe support 5 est de préférence constitué par deux plaques parallèles 5a entre lesquelles sont fixés des axes sur lesquels sont montés les rouleaux 5b eux-mêmes. Les axes des rouleaux 5b sont disposés, en projection sur les plaques 5a, selon un arc de cercle. The support member 5 is preferably constituted by two plates parallels 5a between which are fixed axes on which are mounted the rolls 5b themselves. The axes of the rollers 5b are arranged, projected onto the plates 5a, in an arc.

Le mât 6 est lui-même articulé sur un socle 8 solidaire d'une plate-forme 9, autour d'un axe 10 d'articulation parallèle à l'axe 7.The mast 6 is itself articulated on a base 8 secured to a platform 9, around an axis 10 of articulation parallel to the axis 7.

Sur ce même socle 8, une barre rigide 11 est articulée autour d'un axe d'articulation 12, parallèle aux axes 7 et 10. La barre 11 présente sensiblement la même longueur que le mât 6.On this same base 8, a rigid bar 11 is articulated around an axis hinge 12, parallel to axes 7 and 10. The bar 11 has substantially the same length as mast 6.

A son extrémité opposée au socle 8, la barre 11 est reliée à l'ensemble de rouleaux 5 par un axe de pivotement 13 parallèle aux axes 7, 10 et 12.At its end opposite to the base 8, the bar 11 is connected to the assembly of rollers 5 by a pivot axis 13 parallel to axes 7, 10 and 12.

Conformément à l'invention, les quatre axes 7, 10, 12 et 13 sont situés aux quatre sommets d'un parallélogramme, de sorte que, lors des mouvements d'inclinaison du mât, le plan contenant les axes 7 et 13 reste parallèle au plan lié au socle 8 et défini par les axes 10 et 12.According to the invention, the four axes 7, 10, 12 and 13 are located to the four vertices of a parallelogram, so that during movements inclination of the mast, the plane containing axes 7 and 13 remains parallel to the linked plane to base 8 and defined by axes 10 and 12.

En d'autres termes, l'ensemble de rouleaux 5 demeure parallèle à lui-même quelle que soit l'inclinaison du mât 6.In other words, the roller assembly 5 remains parallel to itself whatever the inclination of the mast 6.

Dans la position inclinée à 45° du mât représentée à la figure 5, le flexible 2 s'enroule sur 135° sur l'ensemble de rouleaux, lequel est tangent au flexible dans la partie verticale et dans la partie parallèle au mât dudit flexible.In the 45 ° tilted position of the mast shown in Figure 5, the flexible 2 is wound on 135 ° on the roller assembly, which is tangent to the flexible in the vertical part and in the part parallel to the mast of said flexible.

Lorsque le mât est horizontal, comme représenté à la figure 6, l'ensemble de rouleaux 5 est toujours tangent au flexible, dans la partie verticale et dans la partie horizontale de ce dernier, mais une partie supérieure de l'ensemble de rouleaux 5, qui s'étend sur 45°, ne sert pas au guidage du flexible.When the mast is horizontal, as shown in Figure 6, the roller assembly 5 is always tangent to the hose, in the vertical part and in the horizontal part of the latter but an upper part of the whole of rollers 5, which extends over 45 °, is not used for guiding the hose.

Néanmoins, cette partie dite excédentaire de l'ensemble de rouleaux ne dépasse pas en dessous du mât 6 et ne gêne pas le remontage du châssis contre le mât.However, this so-called excess part of the roller assembly does not not protrude below the mast 6 and does not interfere with reassembly of the chassis against the mast.

Plus généralement, si on appelle a l'angle que fait le mât 6 avec l'horizontale et am la valeur maximale de cet angle et si on appelle b l'angle au centre correspondant à l'arc de cercle sur lequel sont disposés les rouleaux 5b, on dit avoir la relation : b = 90 degrés + am More generally, if we call a the angle between the pole 6 with the horizontal m and the maximum value of this angle, and if b is called the central angle corresponding to the arc of circle on which are arranged rolls 5b, we say to have the relation b = 90 degrees + a m

Dans ces conditions, quelle que soit l'inclinaison de mât comprise entre 0 degré et am degrés, les deux brins du flexible 2 sont raccordés tangentiellement à l'arc de cercle défini par les rouleaux 5b.Under these conditions, whatever the inclination of the mast between 0 degrees and a m degrees, the two strands of the hose 2 are tangentially connected to the arc defined by the rollers 5b.

Ainsi, on comprend que le dispositif selon l'invention est apte à guider le flexible en lui conférant une courbure progressive propre à le préserver de toute usure prématurée, tout en conservant la compacité de l'appareil de levage sur lequel il est installé.Thus, it is understood that the device according to the invention is able to guide the flexible by giving it a progressive curvature capable of preserving it from any premature wear, while keeping the compactness of the lifting device on which it is installed.

Sur les figures 7 et 8, on a représenté un exemple d'appareil pour creuser des tranchées dans le sol utilisant un dispositif de guidage selon l'invention.FIGS. 7 and 8 show an example of an apparatus for dig trenches in the ground using a guide device according to the invention.

Cet appareil comporte un train de roulement 14 sur lequel repose une plate-forme 15 supportant un enrouleur à axe horizontal 16, un socle 17 et des vérins de poussée 18 qui agissent sur un mât 19 articulé sur le socle 17.This device comprises a running gear 14 on which rests a platform 15 supporting a reel with horizontal axis 16, a base 17 and thrust cylinders 18 which act on a mast 19 articulated on the base 17.

Pour des raisons de clarté, le flexible n'a pas été représenté sur ces dessins.For reasons of clarity, the hose has not been shown on these drawings.

Un ensemble de rouleaux 20 à axes horizontaux parallèles entre eux et disposés sensiblement en arc de cercle est monté pivotant à l'extrémité du mât éloignée de l'enrouleur 16, en étant relié au socle 17 par une barre métallique rigide 21 montée pivotante d'une part audit ensemble de rouleaux 20 et d'autre part au socle 17.A set of rollers 20 with horizontal axes parallel to each other and arranged substantially in an arc is pivotally mounted at the end of the mast remote from the reel 16, being connected to the base 17 by a metal bar rigid 21 pivotally mounted on the one hand to said set of rollers 20 and on the other hand at base 17.

Sur la figure 7, on a reporté les chiffres de référence 7, 10, 12, 13 correspondant aux axes de pivotement et d'articulation des figures 5 et 6.In FIG. 7, the reference numbers 7, 10, 12, 13 are plotted. corresponding to the pivot and articulation axes of Figures 5 and 6.

Le mât et la barre sont dimensionnés et positionnés de manière à constituer les deux côtés opposés d'un parallélogramme déformable grâce auquel le rouleaux 20 demeure parallèle lui-même.The mast and the bar are dimensioned and positioned so that constitute the two opposite sides of a deformable parallelogram by which the rollers 20 remain parallel itself.

Ainsi, aussi bien dans la position haute du mât représentée à la figure 8 que dans la position basse représentée à la figure7, l'ensemble de rouleaux entre tangentiellement en contact avec les deux parties du flexible situées de part et d'autre dudit ensemble de rouleaux.Thus, both in the high position of the mast shown in the figure 8 that in the low position shown in FIG. 7, the roller assembly enters tangentially in contact with the two parts of the hose located on the side and on the other of said set of rollers.

Lorsque le mât se trouve en position haute, comme représenté à la figure 8, le flexible (non représenté) repose sur la totalité de la longueur de l'ensemble de rouleaux, soit environ sur 135°.When the mast is in the high position, as shown in the Figure 8, the hose (not shown) rests on the entire length of the set of rollers, approximately 135 °.

En position basse du mât, comme représenté à la figure 7, l'ensemble de rouleaux présente une portion excédentaire qui se situe dans l'épaisseur du mât et ne gêne en rien le remontage du châssis (non représenté).In the low position of the mast, as shown in Figure 7, the assembly of rollers has an excess portion which is located in the thickness of the mast and does not hinder the reassembly of the chassis (not shown).

Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier, il est bien entendu qu'elle n'y est nullement limitée et que l'on peut lui apporter différentes variantes et modifications sans pour autant sortir du cadre de l'invention tel que decrit dans les revendications.Although the invention has been described in connection with a mode of particular achievement, it is understood that it is in no way limited thereto and that we can make different variants and modifications without going out of the scope of the invention as described in the claims.

En particulier, il est clair que l'invention s'applique indifféremment au guidage d'un ou plusieurs flexibles.In particular, it is clear that the invention applies equally to the guiding one or more hoses.

Claims (5)

  1. Guide apparatus for guiding at least one hose (2) at the end of a boom (6) hinged about a first stationary hinge axis (10), said hose (2) comprising a portion extending along the boom and a portion extending downwards from the end of the boom, the apparatus including a support member (5) disposed at the end of the boom (6) to support the hose by imparting thereto curvature suitable for preventing the hose kinking, at least when the boom is in its low position, the apparatus being characterized by the fact that the support member (5) extends over a length that is sufficient for supporting the hose (2) when the boom is in its high position and without said hose kinking, and by the fact that the support member (5) is mounted to pivot firstly relative to the boom (6) about a first pivot axis (7) and secondly relative to rigid link means (11) about a second pivot axis (13), said rigid link means (11) being itself hinged about a second stationary hinge axis (12), the first and second stationary hinge axes (10, 12) and the first and second pivot axes (7, 13) being situated at the four wedges of a deformable parallelogram such that the support member (5) remains parallel to itself when the boom (6) moves.
  2. Guide apparatus according to claim 1, characterized by the fact that the support member (5) is mounted on the boom (6) in such a manner that its portion that is not supporting the hose when the boom is in its low position penetrates into the thickness of the boom when the boom is in its low position.
  3. Apparatus according to any one of claims 1 and 2, characterized by the fact that the rigid link means connecting the support member (5) to the second hinge axis (12) is constituted by a bar (11) of substantially the same length as the boom (6) and extending parallel thereto.
  4. Apparatus according to any one of claims 1 to 3, characterized by the fact that the support member possesses a succession of rollers having mutually parallel axes perpendicular to the axis of the hose (2), said rollers being disposed in side view on an arc of a circle.
  5. A hoist, in particular for digging trenches in the ground by means of cutting drums, the hoist being of the type comprising a platform (15) supported by running gear (14), a hoist boom (19) hinged to the platform, a frame suspended from the high end of the boom, rotatably-driven cutting drums mounted at the bottom end of the frame, a horizontal-axis winder (16) situated on the platform (15) adjacent to the boom (19) and supporting a hose for raising cuttings from the vicinity of the cutting drums to the surface of the ground, together with one or more hydraulic hoses, which hoses extend from the top portion of the frame to the winder (16) via a vertical portion between the frame and the high end of the boom (19) and a portion parallel to the axis of the boom between the high end of the boom (19) and the winder (16), the hoist being characterized by the fact that it further includes guide apparatus according to any one of claims 1 to 4 at the high end of the boom (19) to confer suitable curvature to the hoses for preventing any kinking thereof at the high end of the boom (19).
EP19970401223 1996-06-04 1997-06-03 Guiding apparatus for one or more flexible tubes at the end of an articulated arm of a lifting apparatus Expired - Lifetime EP0811725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9606872 1996-06-04
FR9606872A FR2749291B1 (en) 1996-06-04 1996-06-04 DEVICE FOR GUIDING ONE OR MORE FLEXIBLES AT THE END OF AN ARTICULATED MAT OF A LIFTING APPARATUS AND LIFTING APPARATUS PROVIDED WITH SUCH A DEVICE, PARTICULARLY FOR HAVING TRENCHES IN THE GROUND

Publications (2)

Publication Number Publication Date
EP0811725A1 EP0811725A1 (en) 1997-12-10
EP0811725B1 true EP0811725B1 (en) 2002-05-08

Family

ID=9492699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970401223 Expired - Lifetime EP0811725B1 (en) 1996-06-04 1997-06-03 Guiding apparatus for one or more flexible tubes at the end of an articulated arm of a lifting apparatus

Country Status (4)

Country Link
EP (1) EP0811725B1 (en)
JP (1) JP3943191B2 (en)
DE (1) DE69712406T2 (en)
FR (1) FR2749291B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2926096B1 (en) 2008-01-03 2014-02-21 Cie Du Sol EXCAVATION MACHINE SUITABLE FOR TRANSPORTING IN CONTAINERS
SE535793C2 (en) * 2010-04-13 2012-12-18 Indexator Group Ab Device for controlling hoses and / or cables

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2696767B1 (en) * 1992-10-09 1994-12-09 Sol Cie Apparatus for digging deep trenches in the ground using milling drums.

Also Published As

Publication number Publication date
DE69712406T2 (en) 2002-08-29
JP3943191B2 (en) 2007-07-11
FR2749291A1 (en) 1997-12-05
FR2749291B1 (en) 1998-09-11
DE69712406D1 (en) 2002-06-13
JPH10120370A (en) 1998-05-12
EP0811725A1 (en) 1997-12-10

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