EP0619265B1 - Telescopic jib for a crane, in particular for a foldable crane - Google Patents
Telescopic jib for a crane, in particular for a foldable crane Download PDFInfo
- Publication number
- EP0619265B1 EP0619265B1 EP93440093A EP93440093A EP0619265B1 EP 0619265 B1 EP0619265 B1 EP 0619265B1 EP 93440093 A EP93440093 A EP 93440093A EP 93440093 A EP93440093 A EP 93440093A EP 0619265 B1 EP0619265 B1 EP 0619265B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipes
- telescopic element
- telescopic
- flexible
- couplings
- 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
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- 238000004873 anchoring Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 9
- 238000010168 coupling process Methods 0.000 claims 9
- 238000005859 coupling reaction Methods 0.000 claims 9
- 230000006866 deterioration Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
Definitions
- the present invention relates to the field of construction of cranes, in particular folding cranes and, in particular, the telescopic arrows of such cranes and relates to such a telescopic boom.
- Foldable cranes which are usually intended to be mounted on trucks or tractors of semi-trailers or the like or on certain handling, consist of a fixed support arm pivotable on a rotating barrel and provided at its other end a hinge for receiving a folding arm housing a telescopic element carrying at its end free a hydraulically actuated claw, or the like.
- the hydraulic actuation means of a claw or other are connected, at the head of the telescopic element, to fluid distribution lines.
- Such a constitution ensures properly the operation of cranes of this type, but present the downside of exposing flexible pipes at the risk of jamming by manipulated loads or still jamming when folding the folding arm against the support arm, as well as all other risks of accidental or malicious damage.
- the pipes were protected by mounting inside the support arm and foldable arm with forecast protective edges and it has been proposed to house the flexible lines in a space provided in the folding arm between at least one wall thereof and the element telescopic, these flexible pipes being arranged according to a loop in said space.
- FR-A-2 355 767 it has, moreover, been proposed to provide the telescopic element with a guide portion extending along a wall of said telescopic element and between the walls of the folding arm. Space thus delimited serves simultaneously for the reception of pipes flexible, so these are protected against damage, especially in the retracted position of the telescopic element.
- the rigid pipes connected to flexible pipes must extend outwardly to the foldable arm, so they remain exposed to risks of crushing or other.
- the wall forming reception of the pipes flexible only extends over a small height of the inner part of the folding arm, so that a jamming of said pipes between the edge of this wall and the internal face of the folding arm remains possible, which also leads to a deterioration of said pipes.
- the pipes are exposed to friction along the inner wall of the foldable arm and therefore to wear.
- a telescopic boom for crane, nacelle or platform essentially constituted by a folding arm pivotally mounted on a support arm and housing a telescopic element actuated by means of a jack and provided at its free end with a fixing nose a handling element or the like, the telescopic element being in the form a box guided in the folding arm and being provided at its front part with plates for fixing hydraulic connections to actuating devices of the element handling or the like, the folding arm being closed at its rear by a plate fitted with hydraulic line connection fittings, and the connection between the connection fittings of the folding arm plate and the plates of the telescopic element being produced by means of pipes consisting of a combination of flexible and rigid pipes extending in the telescopic element, in an S-loop, the pipes rigid extending along a wall of the telescopic element and being fixed to their ends, respectively to the end plates provided near the nose and to fittings provided on support plates fixed at the other end of the
- the telescopic parts constituting the boom are guided together with provision for lower and upper guide bearings. respectively, at the anterior and posterior ends of each part telescopic intermediate.
- these telescopic parts leave subsist between the inner walls of the larger section and the outer of the part with the smallest section a clearance equivalent to that of the bearings of guidance, so that undesirable penetration of objects cannot be avoided and sliding operation may be affected.
- the flexible pipes according to this document are connected each with a guided chain under tension on a deflection pulley, so that these flexible pipes are subject to a dependent displacement stress directly from the movement of chains and corresponding pulleys. As a result, they wear out prematurely due to fatigue imposed by incessant movements with guidance under tension.
- the front part of the element telescopic extreme is provided with external means for fixing an element of handling or the like, which are in no way connected to the end of the actuating cylinder.
- GB-A-2 096 568 describes, moreover, a flexible guide means for flexible pipes, this means being in the form of a chain, the links of which are provided with guide holes for said pipes.
- the guide links extend outwardly along said telescopic element and are thus exposed to risks of deterioration by crushing.
- the object of the present invention is to overcome these drawbacks by offering a telescopic crane jib allowing simultaneous guidance telescopic parts between them avoiding any possibility of penetration undesirable objects, guiding and protecting flexible pipes against any accidental crushing, and simultaneous fixation of the distal end of the actuator for the telescopic element and the element fixing nose handling fitted to said telescopic element.
- the telescopic boom of crane in particular of crane folding, which is essentially constituted by a folding arm mounted at pivoting on a support arm and housing a telescopic element actuated at by means of a jack and provided at its free end with a nose for fixing an element handling or the like, the telescopic element being in the form a box guided in the folding arm and being provided at its front part with plates for fixing hydraulic connections to actuating devices of the element handling or the like, the folding arm being closed at its rear by a plate fitted with hydraulic line connection fittings, and the connection between the connection fittings of the folding arm plate and the plates of the telescopic element being produced by means of pipes consisting of a combination of flexible and rigid pipes extending in the telescopic element, in an S-loop, the pipes rigid extending along a wall of the telescopic element and being fixed to their ends, respectively to the end plates provided near the nose and to fittings provided on support plates fixed at the other end of the telescopic element, the flexible pipes
- FIG. 1 of the accompanying drawings shows a telescopic crane boom, in particular folding crane, essentially constituted by a folding arm 1 pivotally mounted on a support arm 2 and housing a telescopic element 3 actuated by means of a jack 4 and provided at its free end with a nose 5 for fixing a handling element or the like.
- the telescopic element 3 is in the form of a guided box, without preview free space in the folding arm 1 and is provided at its front part of plates 6 for fixing hydraulic fittings 7 of the element actuation devices handling or the like.
- the folding arm 1 is closed at its rear part by a plate 8 provided with connection connections 9 hydraulic lines and the connection between connection fittings 9 of the plate 8 of this folding arm 1 and plates 6 of the telescopic element 3 is carried out via pipes 10 extending in said telescopic element 3 ( Figure 1).
- the connecting lines 10 between the connection fittings 7 and 9 can be in the form of flexible pipes extending into the box forming the telescopic element 3, on either side of the actuating cylinder 4, following an S loop.
- Such an embodiment allows simple mounting of the pipes 10 in the element telescopic 3 by attachment to connection fittings 7 and 9 correspondents.
- FIG 2 shows an alternative embodiment of the invention in which the lines 10 are formed by a combination of flexible pipes 11 and rigid pipes 12, these rigid pipes 12 extending along a wall of the telescopic element 3 and being fixed at their ends, respectively to end plates 6 provided near the nose 5 and at fittings 13 provided on fixed support plates 14 at the other end of the telescopic element 3, the pipes hoses 11 being connected, on the one hand, to the fittings 9 of the plate 8 of the folding arm 1 and, on the other part, to the connections 13 of the support plates 14.
- part of the hydraulic circuit of distribution can be carried out rigidly by pipes 12 fixed directly against a wall and not at risk of deterioration due to wear following friction or fatigue and the part formed by the flexible pipes 11 may be limited to the length necessary for full deployment of the telescopic element 3, these flexible pipes 11 can also be easily disassembled if necessary.
- the telescopic element 3 can be provided so known per se, at the end connection pipes 11 with fittings 13 of the plates support 14 of an intervention window not shown.
- the flexible pipes 11 can extend on either side of the actuator 4 without providing a particular guide. In such a case, the pipes 11 take place inside of element 3 when leaving it and rub against cylinder 4 and against internal walls of element 3.
- Such flexible guide means 15 can be constituted in the form of a flexible sheath housing one or several pipes 11, preferably two pipes 11.
- this flexible guide means 15 will be constituted, as shown in FIGS. 2 to 4, by a sheath with articulated links, made of synthetic material or metal.
- a such articulated sheath allows unwinding movement and winding flexible lines 11 practically unhindered, so that the overall size sheath 15 and flexible pipes 11 is substantially identical the size of the pipes 11 alone.
- this embodiment ensures the lines 11 against any risk of damage by contact with the internal faces of the telescopic element 3.
- the box forming the telescopic element 3 can be subdivided into three longitudinal compartments, namely a central compartment housing the jack 4 and two compartments lateral housing and guide pipes hydraulic 10 and possibly means of flexible guide 15.
- Such an embodiment makes it possible to avoid any risk of contact and / or jamming of hydraulic lines with cylinder 4.
- This embodiment also presents the advantage of not requiring any guidance or special protection of flexible pipes.
- the nose 5 for fixing a handling element or the like consists of two 5 'cheeks inserted and fixed in the front part of the telescopic element 3 and allowing the anchoring of the jack 4. These cheeks 5 ′ are inserted in element 3 of sufficient length to allow a good distribution of the effort due to the load.
- the plates 6 for fixing the hydraulic connections 7 are mounted on the cheeks 5 'of the nose 5, so removable, for example screwing or bolting.
- Such a fixing is intended to allow a easy dismantling of the plates and access to the fixing of the fittings, in particular for total disassembly of the element telescopic 3.
- the invention it is possible to carry out a telescopic crane boom, in particular of collapsible crane, in which the telescopic element is housed fully hydraulic servo lines of the handling device mounted on the nose, so that said crane no longer has any hydraulic line outside his arms, only the lines of connection at the joints visible.
- the cranes so equipped have significantly increased security against risks deterioration of the hydraulic circuits.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
Description
La présente invention concerne le domaine de la construction de grues, en particulier de grues repliables et, notamment, les flèches télescopiques de telles grues et a pour objet une telle flèche télescopique.The present invention relates to the field of construction of cranes, in particular folding cranes and, in particular, the telescopic arrows of such cranes and relates to such a telescopic boom.
Les grues repliables, qui sont généralement destinées à être montées sur des camions ou des tracteurs de semi-remorques ou analogues ou sur certains engins de manutention, sont constituées par un bras de support fixé à pivotement sur un fût rotatif et muni à son autre extrémité d'une articulation de réception d'un bras repliable logeant un élément télescopique portant à son extrémité libre une griffe à actionnement hydraulique, ou analogue.Foldable cranes, which are usually intended to be mounted on trucks or tractors of semi-trailers or the like or on certain handling, consist of a fixed support arm pivotable on a rotating barrel and provided at its other end a hinge for receiving a folding arm housing a telescopic element carrying at its end free a hydraulically actuated claw, or the like.
Les moyens d'actionnement hydraulique d'une griffe ou autre sont raccordés, en tête de l'élément télescopique, à des conduites de distribution de fluide.The hydraulic actuation means of a claw or other are connected, at the head of the telescopic element, to fluid distribution lines.
Actuellement, ces conduites se présentent généralement sous forme de conduites rigides, fixées extérieurement au bras de support et au bras repliable et reliées à des raccords prévus sur des platines d'extrémité de l'élément télescopique au moyen de conduites flexibles permettant la sortie dudit élément télescopique.Currently, these lines generally arise in the form of rigid pipes, fixed externally to the support arm and to the foldable and connected arm to fittings provided on end plates of the telescopic element by means of flexible pipes allowing the exit of said telescopic element.
Ces conduites flexibles s'étendent entre les extrémités du bras repliable et de l'élément télescopique et pendent entre elles en position rétractée dudit élément télescopique.These flexible lines extend between the ends of the folding arm and the telescopic element and hang between them in the retracted position of said element telescopic.
Une telle constitution permet d'assurer correctement le fonctionnement de grues de ce type, mais présente l'inconvénient d'exposer les conduites flexibles aux risques de coincement par des charges manipulées ou encore de coincement lors du repliage du bras repliable contre le bras support, ainsi qu'à tous autres risques de détérioration accidentelle ou par malveillance. Such a constitution ensures properly the operation of cranes of this type, but present the downside of exposing flexible pipes at the risk of jamming by manipulated loads or still jamming when folding the folding arm against the support arm, as well as all other risks of accidental or malicious damage.
De plus, les conduites rigides sont également exposées à des risques d'écrasement, soit lors de la manutention, soit par chocs.In addition, rigid pipes are also exposed to risk of crushing, either during handling, either by shock.
Pour obvier à ces inconvénients, les conduites rigides ont été protégées par montage à l'intérieur du bras de support et sur le bras repliable avec prévision de rebords de protection et il a été proposé de loger les conduites souples dans un espace prévu dans le bras repliable entre au moins une paroi de celui-ci et l'élément télescopique, ces conduites souples étant disposées suivant une boucle dans ledit espace.To overcome these drawbacks, the pipes were protected by mounting inside the support arm and foldable arm with forecast protective edges and it has been proposed to house the flexible lines in a space provided in the folding arm between at least one wall thereof and the element telescopic, these flexible pipes being arranged according to a loop in said space.
Par FR-A-2 355 767 il a, par ailleurs, été proposé de munir l'élément télescopique d'une partie de guidage s'étendant le long d'une paroi dudit élément télescopique et entre les parois du bras repliable. L'espace ainsi délimité sert simultanément à la réception des conduites flexibles, de sorte que celles-ci sont protégées contre des détériorations, notamment en position de rétraction de l'élément télescopique.By FR-A-2 355 767 it has, moreover, been proposed to provide the telescopic element with a guide portion extending along a wall of said telescopic element and between the walls of the folding arm. Space thus delimited serves simultaneously for the reception of pipes flexible, so these are protected against damage, especially in the retracted position of the telescopic element.
Cependant, dans ce mode de réalisation, les conduites rigides reliées aux conduites flexibles doivent s'étendre extérieurement au bras repliable, de sorte qu'elles restent exposées à des risques d'écrasement ou autre.However, in this embodiment, the rigid pipes connected to flexible pipes must extend outwardly to the foldable arm, so they remain exposed to risks of crushing or other.
En outre, la paroi formant réception des conduites flexibles, ne s'étend que sur une faible hauteur de la partie intérieure du bras repliable, de sorte qu'un coincement desdites conduites entre le rebord de cette paroi et la face interne du bras repliable reste possible, ce qui entraíne également une détérioration desdites conduites.In addition, the wall forming reception of the pipes flexible, only extends over a small height of the inner part of the folding arm, so that a jamming of said pipes between the edge of this wall and the internal face of the folding arm remains possible, which also leads to a deterioration of said pipes.
De plus, les conduites sont exposées à un frottement le long de la paroi interne du bras repliable et donc à une usure. In addition, the pipes are exposed to friction along the inner wall of the foldable arm and therefore to wear.
On connaít également, par FR-A-2 553 396, une flèche télescopique pour grue, nacelle ou plate-forme, essentiellement constituée par un bras repliable monté à pivotement sur un bras support et logeant un élément télescopique actionné au moyen d'un vérin et pourvu a' son extrémité libre d'un nez de fixation d'un élément de manutention ou analogue, l'élément télescopique étant sous forme d'un caisson guidé dans le bras repliable et étant muni à sa partie avant de platines de fixation de raccords hydrauliques des dispositifs d'actionnement de l'élément de manutention ou analogue, le bras repliable étant fermé a sa partie arrière par une platine pourvue de raccords de branchement de conduites hydrauliques, et la liaison entre les raccords de branchement de la platine du bras repliable et des platines de l'élément télescopique étant réalisée par l'intermédiaire de conduites constituées par une combinaison de conduites flexibles et de conduites rigides s'étendant dans l'élément télescopique, suivant une boucle en S, les conduites rigides s'étendant le long d'une paroi de l'élément télescopique et étant fixées à leurs extrémités, respectivement aux platines d'extrémité prévues près du nez et à des raccords prévus sur des platines de support fixées à l'autre extrémité de l'élément télescopique, les conduites flexibles étant reliées, d'une part, aux raccords de la platine du bras repliable et, d'autre part, aux raccords des platines de support.We also know, by FR-A-2 553 396, a telescopic boom for crane, nacelle or platform, essentially constituted by a folding arm pivotally mounted on a support arm and housing a telescopic element actuated by means of a jack and provided at its free end with a fixing nose a handling element or the like, the telescopic element being in the form a box guided in the folding arm and being provided at its front part with plates for fixing hydraulic connections to actuating devices of the element handling or the like, the folding arm being closed at its rear by a plate fitted with hydraulic line connection fittings, and the connection between the connection fittings of the folding arm plate and the plates of the telescopic element being produced by means of pipes consisting of a combination of flexible and rigid pipes extending in the telescopic element, in an S-loop, the pipes rigid extending along a wall of the telescopic element and being fixed to their ends, respectively to the end plates provided near the nose and to fittings provided on support plates fixed at the other end of the telescopic element, the flexible pipes being connected, on the one hand, to the fittings of the folding arm plate and, on the other hand, to the connections of the support.
Cependant, ce document ne décrit aucun dispositif de guidage des moyens hydrauliques de transport de fluide entre les différents vérins, ces moyens hydrauliques devant être, d'une part, protégés contre un écrasement ou une usure par frottement et, d'autre part, si possible, guidés à l'intérieur du ou des éléments télescopiques.However, this document does not describe any device for guiding hydraulic means for transporting fluid between the different cylinders, these means on the one hand, they must be protected against crushing or wear by friction and, on the other hand, if possible, guided inside the element (s) telescopic.
Par ailleurs, les parties télescopiques constituant la flèche sont guidées entre elles avec prévision de coussinets de guidage inférieur et supérieur. respectivement, aux extrémités antérieure et postérieure de chaque partie télescopique intermédiaire. Il en résulte que ces parties télescopiques laissent subsister entre les parois intérieure de la partie de plus grande section et extérieure de la partie de plus faible section un jeu équivalent à celui des coussinets de guidage, de sorte qu'une pénétration indésirable d'objets ne peut être évitée et que le fonctionnement de coulissement peut être affecté.Furthermore, the telescopic parts constituting the boom are guided together with provision for lower and upper guide bearings. respectively, at the anterior and posterior ends of each part telescopic intermediate. As a result, these telescopic parts leave subsist between the inner walls of the larger section and the outer of the part with the smallest section a clearance equivalent to that of the bearings of guidance, so that undesirable penetration of objects cannot be avoided and sliding operation may be affected.
En outre, les conduites flexibles selon ce document sont reliées chacune à une chaíne guidée sous tension sur une poulie de renvoi, de sorte que ces conduites flexibles sont soumises à une contrainte de déplacement dépendant directement du déplacement des chaínes et des poulies de renvoi correspondantes. Il en résulte que leur usure s'effectue de manière prématurée du fait de la fatigue imposée par les déplacements incessants avec guidage sous tension.In addition, the flexible pipes according to this document are connected each with a guided chain under tension on a deflection pulley, so that these flexible pipes are subject to a dependent displacement stress directly from the movement of chains and corresponding pulleys. As a result, they wear out prematurely due to fatigue imposed by incessant movements with guidance under tension.
Enfin, d'après ce document, la partie antérieure de l'élément télescopique extrême est pourvue de moyens externes de fixation d'un élément de manutention ou analogue, moyen qui ne sont nullement reliés a' l'extrémité du vérin d'actionnement.Finally, according to this document, the front part of the element telescopic extreme is provided with external means for fixing an element of handling or the like, which are in no way connected to the end of the actuating cylinder.
On connaít également, par FR-A-2 499 051, une disposition de conduite hydraulique d'appareil de chargement comportant des flèches pivotantes, dans laquelle lesdites conduites sont montées, pour partie, dans les éléments de flèche. Cependant, la protection des conduites dans la partie télescopique n'est pas assurée, les conduites flexibles étant simplement logées dans des gouttières s'étendant de part et d'autre de la poutre formant cette partie télescopique. En outre, la poutre télescopique, du fait de sa forme en T, ne permet qu'un guidage sur une partie de sa surface externe.We also know, by FR-A-2 499 051, a provision of loading device hydraulic line with pivoting arrows, in which said conduits are mounted, in part, in the elements of arrow. However, the protection of the pipes in the telescopic part is not assured, flexible pipes being simply housed in gutters extending on either side of the beam forming this telescopic part. In in addition, the telescopic beam, due to its T-shape, only allows guidance on part of its outer surface.
GB-A-2 096 568 décrit, par ailleurs, un moyen de guidage flexible pour des conduites flexibles, ce moyen se présentant sous forme d'une chaíne, dont les maillons sont munis de trous de guidage desdites conduites.GB-A-2 096 568 describes, moreover, a flexible guide means for flexible pipes, this means being in the form of a chain, the links of which are provided with guide holes for said pipes.
Selon ce document, au fur et à mesure de la sortie télescopique de l'élément extrême, les maillons de guidage s'étendent extérieurement le long dudit élément télescopique et sont ainsi exposés à des risques de détérioration par écrasement.According to this document, as the telescopic exit from the end element, the guide links extend outwardly along said telescopic element and are thus exposed to risks of deterioration by crushing.
Enfin, ces documents ne prévoient nullement un nez de fixation d'un élément de manutention ou analogue, pourvu de moyens de fixation dans la partie avant de l'élément télescopique extrême et permettant de réaliser simultanément l'ancrage du vérin de manoeuvre de cet élément.Finally, these documents in no way provide for a fixing nose of a handling element or the like, provided with fixing means in the part front of the extreme telescopic element and allowing to simultaneously realize the anchoring of the actuator of this element.
La présente invention a pour but de pallier ces inconvénients en proposant une flèche télescopique de grue permettant simultanément, un guidage des parties télescopiques entre elles en évitant toute possibilité de pénétration indésirable d'objets, un guidage et une protection des conduites flexibles contre tout écrasement accidentel, et une fixation simultanée de l'extrémité distale du vérin d'actionnement de l'élément télescopique et du nez de fixation d'un élément de manutention équipant ledit élément télescopique.The object of the present invention is to overcome these drawbacks by offering a telescopic crane jib allowing simultaneous guidance telescopic parts between them avoiding any possibility of penetration undesirable objects, guiding and protecting flexible pipes against any accidental crushing, and simultaneous fixation of the distal end of the actuator for the telescopic element and the element fixing nose handling fitted to said telescopic element.
A cet effet, la flèche télescopique de grue, en particulier de grue repliable, qui est essentiellement constituée par un bras repliable monté à pivotement sur un bras support et logeant un élément télescopique actionné au moyen d'un vérin et pourvu à son extrémité libre d'un nez de fixation d'un élément de manutention ou analogue, l'élément télescopique étant sous forme d'un caisson guidé dans le bras repliable et étant muni à sa partie avant de platines de fixation de raccords hydrauliques des dispositifs d'actionnement de l'élément de manutention ou analogue, le bras repliable étant fermé à sa partie arrière par une platine pourvue de raccords de branchement de conduites hydrauliques, et la liaison entre les raccords de branchement de la platine du bras repliable et des platines de l'élément télescopique étant réalisée par l'intermédiaire de conduites constituées par une combinaison de conduites flexibles et de conduites rigides s'étendant dans l'élément télescopique, suivant une boucle en S, les conduites rigides s'étendant le long d'une paroi de l'élément télescopique et étant fixées à leurs extrémités, respectivement aux platines d'extrémité prévues près du nez et à des raccords prévus sur des platines de support fixées à l'autre extrémité de l'élément télescopique, les conduites flexibles étant reliées, d'une part, aux raccords de la platine du bras repliable et, d'autre part, aux raccords des platines de support, est caractérisée en ce que l'élément télescopique est guidé dans le bras repliable par coopération directe de ses parois avec celles dudit bras repliable, en ce que les conduites de liaison entre les raccords de branchement s'étendent dans le caisson formant l'élément télescopique, de part et d'autre du vérin d'actionnement, ou sont sous forme de conduites flexibles enroulées en spirale autour du vérin, en ce que les conduites flexibles s'étendent librement dans le bras repliable et en ce que le nez de fixation d'un élément de manutention ou analogue est constitué par deux joues insérées et fixées dans la partie avant de l'élément télescopique et permettant l'ancrage du vérin. For this purpose, the telescopic boom of crane, in particular of crane folding, which is essentially constituted by a folding arm mounted at pivoting on a support arm and housing a telescopic element actuated at by means of a jack and provided at its free end with a nose for fixing an element handling or the like, the telescopic element being in the form a box guided in the folding arm and being provided at its front part with plates for fixing hydraulic connections to actuating devices of the element handling or the like, the folding arm being closed at its rear by a plate fitted with hydraulic line connection fittings, and the connection between the connection fittings of the folding arm plate and the plates of the telescopic element being produced by means of pipes consisting of a combination of flexible and rigid pipes extending in the telescopic element, in an S-loop, the pipes rigid extending along a wall of the telescopic element and being fixed to their ends, respectively to the end plates provided near the nose and to fittings provided on support plates fixed at the other end of the telescopic element, the flexible pipes being connected, on the one hand, to the fittings of the folding arm plate and, on the other hand, to the connections of the support, is characterized in that the telescopic element is guided in the arm foldable by direct cooperation of its walls with those of said foldable arm, in that the connecting lines between the branch fittings extend in the box forming the telescopic element, on either side of the jack actuation, or are in the form of flexible conduits wound in a spiral around the cylinder, in that the flexible lines extend freely in the arm foldable and in that the fixing nose of a handling element or the like consists of two cheeks inserted and fixed in the front part of the element telescopic and allowing the cylinder to be anchored.
L'invention sera mieux comprise, grâce à la
description ci-après, qui se rapporte à un mode de réalisation
préféré, donné à titre d'exemple non limitatif, et
expliqué avec référence aux dessins schématiques annexes,
dans lesquels :
La figure 1 des dessins annexés représente une
flèche télescopique de grue, en particulier de grue repliable,
essentiellement constituée par un bras repliable
1 monté à pivotement sur un bras support 2 et logeant un
élément télescopique 3 actionné au moyen d'un vérin 4 et
pourvu à son extrémité libre d'un nez 5 de fixation d'un
élément de manutention ou analogue.Figure 1 of the accompanying drawings shows a
telescopic crane boom, in particular folding crane,
essentially constituted by a folding
Conformément à l'invention et comme le montrent
les figures 1 à 4 des dessins annexés, l'élément télescopique
3 est sous forme d'un caisson guidé, sans prévision
d'espace libre, dans le bras repliable 1 et est muni à sa
partie avant de platines 6 de fixation de raccords hydrauliques
7 des dispositifs d'actionnement de l'élément
de manutention ou analogue.According to the invention and as shown
Figures 1 to 4 of the accompanying drawings, the
Le bras repliable 1 est fermé à sa partie arrière
par une platine 8 pourvue de raccords 9 de branchement
de conduites hydrauliques et la liaison entre les
raccords de branchement 9 de la platine 8 de ce bras repliable
1 et des platines 6 de l'élément télescopique 3
est réalisée par l'intermédiaire de conduites 10 s'étendant
dans ledit élément télescopique 3 (figure 1).The
Selon une caractéristique de l'invention, les
conduites 10 de liaison entre les raccords de branchement
7 et 9 peuvent se présenter sous forme de conduites flexibles
s'étendant dans le caisson formant l'élément télescopique
3, de part et d'autre du vérin d'actionnement
4, suivant une boucle en S. Un tel mode de réalisation
permet un montage simple des conduites 10 dans l'élément
télescopique 3 par fixation aux raccords de branchement 7
et 9 correspondants.According to a characteristic of the invention, the
connecting
La figure 2 représente une variante de réalisation
de l'invention dans laquelle les conduites 10 sont
constituées par une combinaison de conduites flexibles 11
et de conduites rigides 12, ces conduites rigides 12
s'étendant le long d'une paroi de l'élément télescopique
3 et étant fixées à leurs extrémités, respectivement aux
platines d'extrémité 6 prévues près du nez 5 et à des
raccords 13 prévus sur des platines de support 14 fixées
à l'autre extrémité de l'élément télescopique 3, les conduites
flexibles 11 étant reliées, d'une part, aux raccords
9 de la platine 8 du bras repliable 1 et, d'autre
part, aux raccords 13 des platines de support 14.Figure 2 shows an alternative embodiment
of the invention in which the
Ainsi, une partie du circuit hydraulique de
distribution pourra être réalisée de manière rigide par
des conduites 12 fixées directement contre une paroi et
ne risquant pas de subir une détérioration par usure suite
au frottement ou par fatigue et la partie formée par
les conduites flexibles 11 pourra être limitée à la longueur
nécessaire au déploiement complet de l'élément télescopique
3, ces conduites flexibles 11 pouvant également
être facilement démontées en cas de besoin. A cet
effet, l'élément télescopique 3 peut être pourvu, de manière
connue en soi, à hauteur du raccordement de l'extrémité
des conduites 11 avec les raccords 13 des platines
de support 14 d'une fenêtre d'intervention non représentée.Thus, part of the hydraulic circuit of
distribution can be carried out rigidly by
Selon une caractéristique de l'invention, les
conduites flexibles 11 peuvent s'étendre de part et d'autre
du vérin 4 sans prévision d'un guidage particulier.
Dans un tel cas, les conduites 11 se déroulent à l'intérieur
de l'élément 3 lors de la sortie de ce dernier et
frottent contre le vérin 4 et contre les parois internes
de l'élément 3.According to a characteristic of the invention, the
Pour éviter une détérioration par usure des
conduites 11 pendant les opérations de sortie et de rentrée
de l'élément 3, il est proposé selon une autre caractéristique
de l'invention, et comme le montrent les
figures 1 à 4 des dessins annexés, de monter lesdites
conduites flexibles 11 dans un moyen de guidage flexible
15.To avoid deterioration by wear of the
Un tel moyen de guidage flexible 15 peut être
constitué sous forme d'une gaine flexible logeant une ou
plusieurs conduites 11, de préférence deux conduites 11. Such flexible guide means 15 can be
constituted in the form of a flexible sheath housing one or
Selon une autre caractéristique de l'invention,
ce moyen de guidage flexible 15 sera constitué, comme représenté
aux figures 2 à 4, par une gaine à maillons articulés,
réalisée en matière synthétique ou en métal. Une
telle gaine articulée permet un mouvement de déroulement
et d'enroulement des conduites flexibles 11 pratiquement
sans entrave, de sorte que l'encombrement de l'ensemble
gaine 15 et conduites flexibles 11 est sensiblement identique
à l'encombrement des conduites 11 seules.According to another characteristic of the invention,
this flexible guide means 15 will be constituted, as shown
in FIGS. 2 to 4, by a sheath with articulated links,
made of synthetic material or metal. A
such articulated sheath allows unwinding movement
and winding
En outre, ce mode de réalisation assure les
conduites 11 contre tout risque de détérioration par contact
avec les faces internes de l'élément télescopique 3.In addition, this embodiment ensures the
Conformément à une autre variante de réalisation
de l'invention, non représentée aux dessins annexés,
le caisson formant l'élément télescopique 3 peut être
subdivisé en trois compartiments longitudinaux, à savoir
un compartiment central logeant le vérin 4 et deux compartiments
latéraux de logement et de guidage des conduites
hydrauliques 10 et éventuellement des moyens de
guidage flexible 15.In accordance with another alternative embodiment
of the invention, not shown in the accompanying drawings,
the box forming the
Un tel mode de réalisation permet d'éviter tout
risque de contact et/ou de coincement des conduites hydrauliques
avec le vérin 4.Such an embodiment makes it possible to avoid any
risk of contact and / or jamming of hydraulic lines
with
Il est également possible, selon une autre variante
de réalisation, non représentée aux dessins annexés,
de disposer les conduites 10 sous forme de conduites
flexibles par enroulement en spirale autour du vérin 4.It is also possible, according to another variant
of production, not shown in the accompanying drawings,
to arrange the
Dans un tel cas, lors de la sortie de l'élément
télescopique 3, le pas des spires de l'enroulement formé
autour du vérin 4 augmente pour compenser l'allongement
correspondant, ce pas diminuant lors de la rétraction.In such a case, when leaving the item
telescopic 3, the pitch of the turns of the winding formed
around the
Ce mode de réalisation présente, en outre, l'avantage de ne nécessiter aucun moyen de guidage ou de protection particulier des conduites flexibles.This embodiment also presents the advantage of not requiring any guidance or special protection of flexible pipes.
Selon une autre caractéristique de l'invention,
le nez 5 de fixation d'un élément de manutention ou analogue
est constitué par deux joues 5' insérées et fixées
dans la partie avant de l'élément télescopique 3 et permettant
l'ancrage du vérin 4. Ces joues 5' sont insérées
dans l'élément 3 d'une longueur suffisante pour permettre
une bonne répartition de l'effort dû à la charge.According to another characteristic of the invention,
the
Les platines 6 de fixation des raccords hydrauliques
7 sont montées sur les joues 5' du nez 5, de manière
amovible, par exemple vissage ou boulonnage.The
Une telle fixation est destinée à permettre un démontage aisé des platines et un accès à la fixation des raccords, notamment en vue d'un démontage total de l'élément télescopique 3.Such a fixing is intended to allow a easy dismantling of the plates and access to the fixing of the fittings, in particular for total disassembly of the element telescopic 3.
Grâce à l'invention, il est possible de réaliser une flèche télescopique de grue, en particulier de grue repliable, dans laquelle l'élément télescopique loge entièrement les conduites hydrauliques d'asservissement du dispositif de manutention monté sur le nez, de sorte que ladite grue ne présente plus aucune conduite hydraulique à l'extérieur de ses bras, seules les conduites de raccordement au niveau des articulations restant visibles. Il en résulte que les grues ainsi équipées présentent une sécurité très nettement accrue contre les risques de détérioration des circuits hydrauliques.Thanks to the invention, it is possible to carry out a telescopic crane boom, in particular of collapsible crane, in which the telescopic element is housed fully hydraulic servo lines of the handling device mounted on the nose, so that said crane no longer has any hydraulic line outside his arms, only the lines of connection at the joints visible. As a result, the cranes so equipped have significantly increased security against risks deterioration of the hydraulic circuits.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention, tel que défini dans les revendications.Of course, the invention is not limited to embodiment described and shown in the accompanying drawings. Modifications remain possible, in particular from point of view of the constitution of the various elements or by substitution of technical equivalents, without going out within the scope of protection of the invention, such as defined in the claims.
Claims (6)
- Telescopic jib for a crane, in particular for a foldable crane, essentially consisting of a foldable arm (1) mounted pivotally on a supporting arm (2) and accommodating a telescopic element (3) actuated by means of a jack (4) and provided at its free end with a nose (5) for fixing a handling element or the like, the telescopic element (3) being in the form of a box guided in the foldable arm (1) and being equipped at its leading portion with plates (6) for fixing hydraulic couplings (7) of the devices for actuating the handling element or the like, the foldable arm (1) being closed at its trailing portion by a plate (8) provided with couplings (9) for connection of hydraulic pipes, and the joint between the connecting couplings (7 and 9) for the plate (8) of the foldable arm (1) and the plates (6) of the telescopic element (3) being produced by means of pipes (10) consisting of a combination of flexible pipes (11) and rigid pipes (12) extending in the telescopic element (3) in an S-shaped loop, the rigid pipes (12) extending along a wall of the telescopic element (3) and being fixed at their ends to the end plates (6) provided close to the nose (5) and to couplings (13) provided on support plates (14) fixed to the other end of the telescopic element (3) respectively, the flexible pipes (11) being connected, on the one hand, to the couplings (9) of the plate (8) of the foldable arm (1) and, on the other hand, to the couplings (13) of the support plates (14), characterised in that the telescopic element (3) is guided in the foldable arm (1) by direct cooperation between its walls and those of said foldable arm (1), in that the joining pipes (10) between the connecting couplings (7 and 9) extend into the box forming the telescopic element (3) on either side of the actuating jack (4) or are in the form of flexible pipes wound spirally round the jack (4), in that the flexible pipes (11) extend freely in the foldable arm (1) and in that the nose (5) for fixing a handling element or the like consists of two cheeks (5') which are inserted and fixed in the leading portion of the telescopic element (3) and allow the anchoring of the jack (4).
- Jib according to claim 1, characterised in that the flexible pipes (11) are mounted in a flexible guide means (15).
- Jib according to claim 2, characterised in that the flexible guide means (15) is made up in the form of a flexible sheath accommodating one or more pipes (11), preferably two pipes (11).
- Jib according to claim 2, characterised in that the flexible guide means (15) consists of a sheath having articulated links, produced from synthetic material or metal.
- Jib according to claim 1, characterised in that, if the joining pipes (10) between the connecting couplings (7 and 9) extend into the box forming the telescopic element (3), on either side of the actuating jack (4), the box forming the telescopic element (3) is sub-divided into three longitudinal compartments, namely a central compartment accommodating the jack (4) and two lateral compartments accommodating and guiding hydraulic pipes (10) and possibly flexible guide means (15).
- Jib according to claim 1, characterised in that the fixing plates (6) of the hydraulic couplings (7) are mounted removably on the cheeks (5') of the nose (5), for example by screwing or bolting.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9215980 | 1992-12-28 | ||
| FR9215980A FR2699909B1 (en) | 1992-12-28 | 1992-12-28 | Telescopic crane boom, in particular folding crane. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0619265A2 EP0619265A2 (en) | 1994-10-12 |
| EP0619265A3 EP0619265A3 (en) | 1995-01-04 |
| EP0619265B1 true EP0619265B1 (en) | 2000-05-31 |
Family
ID=9437333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93440093A Expired - Lifetime EP0619265B1 (en) | 1992-12-28 | 1993-11-24 | Telescopic jib for a crane, in particular for a foldable crane |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0619265B1 (en) |
| AT (1) | ATE193504T1 (en) |
| DE (1) | DE69328768T2 (en) |
| FR (1) | FR2699909B1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1507735B1 (en) * | 2002-05-03 | 2007-07-18 | Clark Equipment Company | Removable hydraulic hose carrier |
| FR2845370B1 (en) * | 2002-10-04 | 2004-12-17 | Jean Diebolt | CRANE WITH FOLDABLE AND / OR TELESCOPIC ARMS |
| FR2888227A1 (en) * | 2005-07-05 | 2007-01-12 | Kabelschlepp France Sarl | Telescopic crane boom, has tensioning part disposed at interior of closed loop and comprising two rollers for rolling on chain and on strap, respectively, and link rod maintaining roller in contact with closed loop |
| ITTO20110403A1 (en) * | 2011-05-06 | 2012-11-07 | B O B Sistemi Idraulici S P A | TELESCOPIC ARM FOR A CRANE OF MOVEMENT OF AN ACCESSORY ORGAN |
| CN104649157A (en) * | 2014-01-03 | 2015-05-27 | 中船华南船舶机械有限公司 | Telescopic type cable guiding device |
| CN104150372A (en) * | 2014-07-22 | 2014-11-19 | 广西梧州运龙港船机械制造有限公司 | Hydraulic foldable arm telescopic crane for ships |
| CN105621291B (en) * | 2014-10-31 | 2017-09-22 | 无锡晟欧船舶设备有限公司 | A kind of sustainable crane of arm |
| CN105600689A (en) * | 2014-10-31 | 2016-05-25 | 无锡晟欧船舶设备有限公司 | Stretching lifting apparatus |
| SI26015A (en) * | 2020-06-12 | 2021-12-31 | Tajfun Liv, Proizvodnja In Razvoj D.O.O. | Mobile telescopic hydraulic crane |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3623501A (en) * | 1970-07-13 | 1971-11-30 | Chance Co Ab | Continuous hydraulic hose structure for telescopic boom assembly |
| US3893480A (en) * | 1973-12-26 | 1975-07-08 | Glenn G Dunbar | Hydraulic line assembly |
| US4034875A (en) * | 1974-10-12 | 1977-07-12 | The Liner Concrete Machinery Company Limited | Load handling vehicle |
| FR2279011A1 (en) * | 1975-02-24 | 1976-02-13 | Poclain Sa | Hydraulic fluid supply along telescopic arms - with internal U shaped flexible connector guided by channel sections |
| SE424853B (en) * | 1981-01-30 | 1982-08-16 | Hiab Foco Ab | EQUIPMENT OF HYDRAULIC CABLES FOR LOADING DEVICES WITH SWINGABLE CRANE ARM |
| GB2096568B (en) * | 1981-04-14 | 1985-01-03 | Coles Cranes Ltd | Power transmission along telescopic booms |
| FR2553396B1 (en) * | 1983-10-17 | 1986-02-07 | Haulotte Sa Ateliers Const A | TELESCOPIC BOOM FOR CRANE, NACELLE OR PLATFORM |
| US4809472A (en) * | 1987-09-25 | 1989-03-07 | Kidde Industries, Inc. | Carrier track assembly for extensible and retractable boom machines |
-
1992
- 1992-12-28 FR FR9215980A patent/FR2699909B1/en not_active Expired - Fee Related
-
1993
- 1993-11-24 AT AT93440093T patent/ATE193504T1/en not_active IP Right Cessation
- 1993-11-24 DE DE69328768T patent/DE69328768T2/en not_active Expired - Lifetime
- 1993-11-24 EP EP93440093A patent/EP0619265B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0619265A3 (en) | 1995-01-04 |
| FR2699909A1 (en) | 1994-07-01 |
| FR2699909B1 (en) | 1995-02-03 |
| DE69328768T2 (en) | 2001-02-01 |
| DE69328768D1 (en) | 2000-07-06 |
| EP0619265A2 (en) | 1994-10-12 |
| ATE193504T1 (en) | 2000-06-15 |
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