EP0284593B1 - Cutting jib - Google Patents

Cutting jib Download PDF

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Publication number
EP0284593B1
EP0284593B1 EP88870050A EP88870050A EP0284593B1 EP 0284593 B1 EP0284593 B1 EP 0284593B1 EP 88870050 A EP88870050 A EP 88870050A EP 88870050 A EP88870050 A EP 88870050A EP 0284593 B1 EP0284593 B1 EP 0284593B1
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EP
European Patent Office
Prior art keywords
kerving
belt
notched belt
arm
intended
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
EP88870050A
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German (de)
French (fr)
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EP0284593A1 (en
Inventor
Charles Pierre Hallez
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Diamant Boart NV SA
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Diamant Boart NV SA
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Publication date
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Priority to AT88870050T priority Critical patent/ATE70890T1/en
Publication of EP0284593A1 publication Critical patent/EP0284593A1/en
Application granted granted Critical
Publication of EP0284593B1 publication Critical patent/EP0284593B1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
    • E21C25/28—Chains or chain guides
    • E21C25/34—Chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/124—Saw chains; rod-like saw blades; saw cables

Definitions

  • the present invention relates to a lifting arm on which is stretched an endless element furnished externally with cutting tools intended to carry out the cutting and the felling of rocks and internally with guide shoes capable of following a groove formed along said arm. , the endless element being rotated by a drive wheel and a deflection wheel having at their periphery notches intended to receive the said guide pads.
  • the drive wheel and the return wheel have a solid core of uniform thickness and circumferential circumference provided with a rough coating.
  • German patent application DE-A 3128264 is a lifting arm of a coal cutting machine comprising an endless belt, of trapezoidal cross section, furnished externally with diamond cutting elements and internally with guide shoes.
  • the belt is rotated by a drive wheel and by a return wheel provided with a trapezoidal groove whose inclined walls enclose the sides of the belt.
  • the belt is provided on its outer face with slots on which are fixed by interlocking tool-holder elements fixed with pins engaged in transverse holes.
  • This configuration makes it possible to fully absorb the considerable shocks to which the tool heads are subjected, using the bearing surfaces provided for this purpose between the tool head and the tool body.
  • a lifting arm is known from BE-A-865189 on which is stretched an endless element driven in rotation by a driving wheel and a deflection wheel and externally equipped with cutting tools intended to carry out the cutting and the felling of rocks and internally guide shoes able to follow a groove formed along said arm.
  • the drive wheel has notches at its periphery in which the pads mesh.
  • the present invention aims to remedy the above drawbacks. It relates to a shearer comprising a shearer arm on which is stretched an endless element equipped externally with cutting tools intended to carry out the havage and the felling of rocks and internally with guide shoes able to follow a groove formed along said arm, the endless element being driven in rotation by a drive wheel and a return wheel having at their periphery, ridges separated by notches intended to receive the aforementioned guide pads.
  • the endless element bears on the ridges, so as to avoid any contact of the guide pads against the wheels (8, 9).
  • the endless element is a toothed belt.
  • the ridges separating the aforementioned notches from the drive and deflection wheels are furnished with teeth which mesh in the corresponding notches of the toothed belt, bearing thereon so as to avoid any contact of the guide pads against the wheels.
  • the upper face of the pad support has recesses intended to receive the crenellations of a toothed belt.
  • the lower part of the metal tool body carries an optionally removable sole made of synthetic material.
  • a lifting arm comprises a frame in one piece in the form of a welded construction.
  • the chassis consists essentially of a upper spar 1 and a lower spar 2 formed of beams forming a frame 3 covered on both sides by side plates 4 and 5 projecting from the spars 1, 2 so as to form an upper groove 6 whose width is equal to that of side rails 1, 2.
  • the groove 6 is supplied with water by injectors 7 formed at the bottom thereof.
  • One end of the lifting arm carries a drive wheel 8, the other a return wheel 9. On these wheels is stretched an endless element consisting for example of a toothed belt 10.
  • This belt 10 is externally equipped with elements carrying cutting tools 11 intended for carrying out the cutting and felling of rocks and internally of guide shoes 12 able to follow the groove 6 formed along the side members 1, 2 of the lifting arm.
  • the drive wheel 8 and the return wheel 9 each comprise a solid core 13 of uniform thickness, mounted by screws 14 on a plate 15.
  • the core is sandwiched between two flanges 16.
  • the plate 15 is mechanically connected to a output shaft 17 of an electric motor not shown, mounted on the frame of the lifting arm.
  • the core 13 of the drive wheel 8 and of the deflection wheel 9 have notches 18 separated from each other by ridges 19 furnished with teeth 20 which mesh in the notches 21 of the toothed belt 10.
  • the guide parts slide in the grooves of the side members and penetrate into the notches 18, so as to allow the toothed belt to bear on the ridges furnished with teeth 20.
  • the teeth mesh in the notches 21 of the toothed belt and force the latter to adhere to the drive wheel, excluding any slippage.
  • This arrangement has the advantage of transmitting the traction torque to the belt by means of all of the fibers adjacent to the main fibers of the toothed belt and not by means of the pads. This increases the life of the belt.
  • FIGS 2 to 4 show from various angles a tool holder element designated as a whole by the reference symbol 23, for lifting arm and cutting device implementing an endless element 10.
  • Each cutting tool 11 comprises a cutting element not shown brazed the tool member 23 having an inverted U-shaped section.
  • the branches 26 in inverted U have on the inner side, preferably at their end, tenons 27 or claws intended to grip the notches 21 of the toothed belt 10.
  • These claws 27 of the tool body 23 are folded in the sides lateral 28 of a shoe 12 disposed against the inner face of the endless element 10.
  • the upper face 29 of the shoe 12 has recesses 30 intended to receive the notches 21 of the toothed belt 10.
  • the pads 12 are fixed to the tool body 23, without altering or weakening the belt. They can optionally be fixed removably.
  • the lifting arm according to the invention can be used for the calibration of plates or blocks of hard mineral materials.
  • Calibration is a surfacing operation during which the above-mentioned arm, contained in a plane inclined by 45 ° relative to the surface to be calibrated, is moved parallel to itself along the surface, so as to sweep it this entirely.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Food-Manufacturing Devices (AREA)
  • Belt Conveyors (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Lubricants (AREA)

Abstract

In accordance with the invention, on the periphery of the motor wheel (8) and the return wheel (9) of a cutting arm, grooves (18) are provided which are separated from one another by ridges (19). This arrangement enables the traction couple to be transmitted to the endless component (10), which is provided on the exterior with cutting tools (11) and on the interior with guide plates (12), by the assembly of fibers adjacent to the principal fibers of the endless component (10) and not by the guide plates (12).

Description

La présente invention est relative à un bras haveur sur lequel est tendu un élément sans fin garni extérieurement d'outils coupants destinés à exécuter le havage et l'abattage de roches et intérieurement de patins de guidage aptes à suivre une rainure ménagée le long dudit bras, l'élément sans fin étant entraîné en rotation par une roue motrice et une roue de renvoi présentant à leur périphérie des échancrures destinées à recevoir les patins de guidage susdits.The present invention relates to a lifting arm on which is stretched an endless element furnished externally with cutting tools intended to carry out the cutting and the felling of rocks and internally with guide shoes capable of following a groove formed along said arm. , the endless element being rotated by a drive wheel and a deflection wheel having at their periphery notches intended to receive the said guide pads.

On connaît déjà par le brevet européen n° 0014776 un bras haveur équipant une machine de havage de roches et comprenant un châssis bordé par des longerons aux extrémités desquels sont montées, respectivement une roue d'entraînement et une roue de renvoi d'un élément sans fin. Cet élément sans fin consiste généralement en une courroie portant extérieurement des outils coupants et intérieurement des patins de guidage constitués de blocs s'étendant dans une rainure. En service, les blocs glissent sur toute la largeur de la rainure sur une nappe de fluide amené à l'aide d'injecteurs ménagés au fond de la rainure. Dans les machines connues, les patins sont fixés sur la courroie à l'aide de vis traversant les courroies. L'inconvénient majeur de cette fixation consiste en un affaiblissement local de la courroie aux endroits de fixation puisque les trous de fixation constituent des discontinuités susceptibles d'induire des concentrations de contraintes de tension et de flexion.Already known from European Patent No. 0014776 a lifting arm equipping a rock cutting machine and comprising a chassis bordered by side members at the ends of which are mounted respectively a drive wheel and a return wheel of an element without end. This endless element generally consists of a belt externally carrying cutting tools and internally guide shoes consisting of blocks extending in a groove. In service, the blocks slide over the entire width of the groove on a sheet of fluid supplied using injectors formed at the bottom of the groove. In known machines, the pads are fixed to the belt using screws passing through the belts. The major drawback of this fixing consists in a local weakening of the belt at the fixing places since the fixing holes constitute discontinuities liable to induce concentrations of tension stresses and bending.

La roue motrice et la roue de renvoi comportent une âme pleine d'épaisseur uniforme et de pourtour circonférenciel garni d'un revêtement rugueux.The drive wheel and the return wheel have a solid core of uniform thickness and circumferential circumference provided with a rough coating.

En marche, les patins prennent appui sans glisser contre le revêtement rugueux de la roue motrice pour entraîner la courroie. Pour éviter le patinage des patins sur la roue motrice par manque d'adhérence, il est nécessaire de tendre au maximum la courroie entre la roue motrice et la roue de renvoi. Une telle précontrainte de traction entraîne bien sûr une usure prématurée de la courroie.When running, the pads press without sliding against the rough coating of the drive wheel to drive the belt. To avoid slipping of the pads on the drive wheel due to lack of grip, it is necessary to tension the belt as much as possible between the drive wheel and the idler wheel. Such tensile preload naturally leads to premature wear of the belt.

On connaît également par la demande de brevet allemand DE-A 3128264, un bras haveur d'une machine de havage de charbon comportant une courroie sans fin, de section trapézoïdale, garnie extérieurement d'éléments coupants diamantés et intérieurement de patins de guidage. La courroie est entraînée en rotation par une roue motrice et par une roue de renvoi munie d'une gorge trapézoïdale dont les parois inclinées enserrent les flancs de la courroie.Also known from German patent application DE-A 3128264 is a lifting arm of a coal cutting machine comprising an endless belt, of trapezoidal cross section, furnished externally with diamond cutting elements and internally with guide shoes. The belt is rotated by a drive wheel and by a return wheel provided with a trapezoidal groove whose inclined walls enclose the sides of the belt.

La courroie est munie sur sa face extérieure de créneaux sur lesquels sont fixés par emboîtement des éléments porte-outils fixés à l'aide de goupilles engagées dans des trous transversaux.The belt is provided on its outer face with slots on which are fixed by interlocking tool-holder elements fixed with pins engaged in transverse holes.

Cette configuration permet de reprendre entièrement les chocs considérables auquels sont soumises les têtes d'outils, à l'aide des surfaces d'appui prévues à cet effet entre la tête d'outil et le corps d'outil.This configuration makes it possible to fully absorb the considerable shocks to which the tool heads are subjected, using the bearing surfaces provided for this purpose between the tool head and the tool body.

Elle permet également d'éviter l'endommagement des goupilles de fixation, de manière sûre.It also prevents damage to the fixing pins, in a safe way.

L'inconvénient majeur de ce bras haveur connu réside dans le fait que la courroie est soumise à des flexions importantes et répétées aux extrémités de chacun des patins, lors de chaque passage sur les roues motrices et de renvoi. Ces flexions répétées entraînent la fatigue localisée de la courroie et provoquent la rupture progressive de celle-ci.The major drawback of this known lifting arm lies in the fact that the belt is subjected to significant and repeated bending at the ends of each of the pads, during each passage on the drive and return wheels. These repeated flexions cause localized fatigue of the belt and cause it to rupture progressively.

Enfin, un bras haveur est connu de BE-A-865189 sur lequel est tendu un élément sans fin entraîné en rotation par une roue motrice et une roue de renvoi et équipé extérieurement d'outils coupants destinés à exécuter le havage et l'abattage des roches et intérieurement de patins de guidage aptes à suivre une rainure ménagée le long dudit bras. La roue motrice présente à sa périphérie des échancrures dans lesquelles engrènent les patins.Finally, a lifting arm is known from BE-A-865189 on which is stretched an endless element driven in rotation by a driving wheel and a deflection wheel and externally equipped with cutting tools intended to carry out the cutting and the felling of rocks and internally guide shoes able to follow a groove formed along said arm. The drive wheel has notches at its periphery in which the pads mesh.

L'inconvénient majeur de ce bras haveur connu réside dans le fait que les échancrures sont peu profondes et que les patins reposent sur le fond des échancrures. La traction exercée sur l'élément sans fin par la roue motrice et la roue de renvoi est entièrement reprise à travers les patins de guidage, de sorte que des forces de pliage importantes et répétées sont appliquées sur l'élément sans fin aux extrémités de chacun des patins, à cause des couples transmis par ceux-ci.The major drawback of this known lifting arm lies in the fact that the notches are shallow and that the pads rest on the bottom of the notches. The traction exerted on the endless element by the drive wheel and the deflection wheel is fully taken up through the guide shoes, so that significant and repeated bending forces are applied to the endless element at the ends of each. skates, because of the couples transmitted by these.

Par le document US-A-3604755, on connaît un bras haveur comprenant une roue motrice et une roue de renvoi qui sont pourvues d'échancrures à flancs inclinés et sur lesquelles est tendue une chaîne sans fin dont les maillons sont formés de patins trapézoïdaux qui suivant une rainure ménagée le long du bras et qui engrènent dans les échancrures susdites en reposant sur les flancs inclinés des échancrures. Une telle chaîne sans fin est bruyante en raison du martellement de la roue motrice et de la roue de renvoi par les patins.Document US-A-3604755 discloses a lifting arm comprising a drive wheel and a drive wheel. return which are provided with notches with inclined sides and on which is stretched an endless chain whose links are formed by trapezoidal shoes which follow a groove formed along the arm and which mesh in the aforementioned notches by resting on the inclined sides of the indentations. Such an endless chain is noisy due to the hammering of the drive wheel and the return wheel by the pads.

La présente invention vise à remédier aux inconvénients susdits. Elle est relative à une haveuse comportant un bras haveur sur lequel est tendu un élément sans fin équipé extérieurement d'outils coupants destinés à exécuter le havage et l'abattage de roches et intérieurement de patins de guidage aptes à suivre une rainure ménagée le long dudit bras, l'élément sans fin étant entraîné en rotation par une roue motrice et une roue de renvoi présentant à leur périphérie, des crêtes séparées par des échancrures destinées à recevoir les patins de guidage susdits.The present invention aims to remedy the above drawbacks. It relates to a shearer comprising a shearer arm on which is stretched an endless element equipped externally with cutting tools intended to carry out the havage and the felling of rocks and internally with guide shoes able to follow a groove formed along said arm, the endless element being driven in rotation by a drive wheel and a return wheel having at their periphery, ridges separated by notches intended to receive the aforementioned guide pads.

Selon l'invention, l'élément sans fin prend appui sur les crêtes, de manière à éviter tout contact des patins de guidage contre les roues (8,9).According to the invention, the endless element bears on the ridges, so as to avoid any contact of the guide pads against the wheels (8, 9).

Dans une forme de réalisation préférée, l'élément sans fin est une courroie crantée.In a preferred embodiment, the endless element is a toothed belt.

Les crêtes séparant les échancrures susdites des roues motrice et de renvoi, sont garnies de dents qui engrènent dans les crénelures correspondantes de la courroie crantée, en y prenant appui de manière à éviter tout contact des patins de guidage contre les roues.The ridges separating the aforementioned notches from the drive and deflection wheels are furnished with teeth which mesh in the corresponding notches of the toothed belt, bearing thereon so as to avoid any contact of the guide pads against the wheels.

Suivant une particularité de l'invention la face supérieure du support de patin présente des évidements destinés à recevoir les crénelures d'une courroie crantée.According to a feature of the invention, the upper face of the pad support has recesses intended to receive the crenellations of a toothed belt.

Dans une forme de réalisation particulière, la partie inférieure du corps d'outil en métal porte une semelle éventuellement amovible en matière synthétique.In a particular embodiment, the lower part of the metal tool body carries an optionally removable sole made of synthetic material.

D'autres particularités et détails de l'invention apparaîtront au cours de la description détaillée suivante faisant référence aux dessins ci-annexés et qui représentent schématiquement et à titre non limitatif, une forme de réalisation du dispositif suivant l'invention.Other features and details of the invention will appear during the following detailed description referring to the attached drawings and which schematically and without limitation, an embodiment of the device according to the invention.

Dans ces dessins:

  • ― la figure 1 est une vue en élévation partiellement arrachée, d'un bras haveur suivant l'invention;
  • ― la figure 2 montre en vue éclatée un élément porte-outil muni d'un patin;
  • ― la figure 3 est une vue en élévation latérale de l'élément porte-outil montré à la figure 2 et
  • ― la figure 4 est une vue en bout de l'élément porte-outil montré aux figures 2 et 3.
In these drawings:
  • - Figure 1 is a partially broken away elevation view of a lifting arm according to the invention;
  • - Figure 2 shows in exploded view a tool holder element provided with a shoe;
  • FIG. 3 is a side elevation view of the tool-carrying element shown in FIG. 2 and
  • FIG. 4 is an end view of the tool-carrying element shown in FIGS. 2 and 3.

Dans ces figures, les mêmes signes de références désignent des éléments identiques ou analogues.In these figures, the same reference signs designate identical or analogous elements.

Comme illustré à la figure 1, un bras haveur comprend un châssis en une seule pièce sous forme de construction soudée.As illustrated in FIG. 1, a lifting arm comprises a frame in one piece in the form of a welded construction.

Le châssis est constitué essentiellement d'un longeron supérieur 1 et d'un longeron inférieur 2 formés de poutrelles formant une ossature 3 recouverte des deux côtés par des tôles latérales 4 et 5 débordant des longerons 1, 2 de manière à former une rainure supérieure 6 dont la largeur est égale à celle des longerons 1, 2.The chassis consists essentially of a upper spar 1 and a lower spar 2 formed of beams forming a frame 3 covered on both sides by side plates 4 and 5 projecting from the spars 1, 2 so as to form an upper groove 6 whose width is equal to that of side rails 1, 2.

Comme décrit dans le brevet européen 0014776, la rainure 6 est alimentée en eau par des injecteurs 7 ménagés au fond de celle-ci.As described in European patent 0014776, the groove 6 is supplied with water by injectors 7 formed at the bottom thereof.

Une extrémité du bras haveur porte une roue motrice 8, l'autre une roue de renvoi 9. Sur ces roues est tendu un élément sans fin constitué par exemple d'une courroie crantée 10. Cette courroie 10 est équipée extérieurement d'éléments portant des outils coupants 11 destinés à exécuter le havage et l'abattage de roches et intérieurement de patins de guidage 12 aptes à suivre la rainure 6 ménagée le long des longerons 1, 2 du bras haveur.One end of the lifting arm carries a drive wheel 8, the other a return wheel 9. On these wheels is stretched an endless element consisting for example of a toothed belt 10. This belt 10 is externally equipped with elements carrying cutting tools 11 intended for carrying out the cutting and felling of rocks and internally of guide shoes 12 able to follow the groove 6 formed along the side members 1, 2 of the lifting arm.

La roue motrice 8 et la roue de renvoi 9 comportent chacune une âme pleine 13 d'une épaisseur uniforme, montée par des vis 14 sur un plateau 15. L'âme est enserrée entre deux flasques 16. Le plateau 15 est relié mécaniquement à un arbre de sortie 17 d'un moteur électrique non montré, monté sur l'ossature du bras haveur.The drive wheel 8 and the return wheel 9 each comprise a solid core 13 of uniform thickness, mounted by screws 14 on a plate 15. The core is sandwiched between two flanges 16. The plate 15 is mechanically connected to a output shaft 17 of an electric motor not shown, mounted on the frame of the lifting arm.

L'âme 13 de la roue motrice 8 et de la roue de renvoi 9 présentent des échancrures 18 séparées entre elles par des crêtes 19 garnies de dents 20 qui engrènent dans les crénelures 21 de la courroie crantée 10.The core 13 of the drive wheel 8 and of the deflection wheel 9 have notches 18 separated from each other by ridges 19 furnished with teeth 20 which mesh in the notches 21 of the toothed belt 10.

Lorsque la courroie crantée 10 se déplace sous l'action de la roue motrice 8, les parties de guidage coulissent dans les rainures des longerons et pénèrent dans les échancrures 18, de manière à permettre à la courroie crantée de prendre appui sur les crêtes garnies de dents 20.When the toothed belt 10 moves under the action of the driving wheel 8, the guide parts slide in the grooves of the side members and penetrate into the notches 18, so as to allow the toothed belt to bear on the ridges furnished with teeth 20.

Les dents engrènent dans les crénelures 21 de la courroie crantée et forcent celle-ci à adhérer à la roue motrice en excluant tout patinage.The teeth mesh in the notches 21 of the toothed belt and force the latter to adhere to the drive wheel, excluding any slippage.

Cette disposition a l'avantage de transmettre le couple de traction à la courroie par l'intermédiaire de l'ensemble des fibres voisines des fibres principales de la courroie crantée et non pas par l'intermédiaire des patins. On augmente ainsi la durée de vie de la courroie.This arrangement has the advantage of transmitting the traction torque to the belt by means of all of the fibers adjacent to the main fibers of the toothed belt and not by means of the pads. This increases the life of the belt.

Les figures 2 à 4 représentent sous divers angles un élément porte-outil désigné dans son ensemble par le signe de référence 23, pour bras haveur et dispositif de havage mettant en oeuvre un élément sans fin 10. Chaque outil coupant 11 comprend un élément coupant non montré brasé l'élément porte-outil 23 ayant une section en forme de U renversé. Les branches 26 en U renversé présentent du côté intérieur, de préférence à leur extrémité, des tenons 27 ou griffes destinés à s'agripper aux crénelures 21 de la courroie crantée 10. Ces griffes 27 du corps d'outil 23 sont repliées dans les flancs latéraux 28 d'un patin 12 disposé contre la face intérieure de l'élément sans fin 10.Figures 2 to 4 show from various angles a tool holder element designated as a whole by the reference symbol 23, for lifting arm and cutting device implementing an endless element 10. Each cutting tool 11 comprises a cutting element not shown brazed the tool member 23 having an inverted U-shaped section. The branches 26 in inverted U have on the inner side, preferably at their end, tenons 27 or claws intended to grip the notches 21 of the toothed belt 10. These claws 27 of the tool body 23 are folded in the sides lateral 28 of a shoe 12 disposed against the inner face of the endless element 10.

Lorsque l'élément sans fin est une courroie crantée, la face supérieure 29 du patin 12 présente des évidements 30 destinés à recevoir les crénelures 21 de la courroie crantée 10.When the endless element is a toothed belt, the upper face 29 of the shoe 12 has recesses 30 intended to receive the notches 21 of the toothed belt 10.

Les patins 12 sont fixés au corps d'outil 23, sans altérer ni affaiblir la courroie. Ils peuvent éventuellement être fixés amoviblement.The pads 12 are fixed to the tool body 23, without altering or weakening the belt. They can optionally be fixed removably.

Il est évident que l'invention n'est pas exclusivement limitée à la forme de réalisation représentée et que bien des modifications peuvent être apportées dans la forme, la disposition et la constitution de certains éléments intervenant dans la réalisation à condition que ces modifications ne soient pas en contradiction avec l'objet des revendications suivantes.It is obvious that the invention is not exclusively limited to the embodiment shown and that many modifications can be made in the form, arrangement and constitution of certain elements involved in the realization provided that these modifications are not not contradict the subject of the following claims.

Ainsi le bras haveur selon l'invention, peut être utilisé pour le calibrage de plaques ou blocs de matériaux minéraux durs. Le calibrage est une opération de surfaçage au cours de laquelle le bras susdit, contenu dans un plan incliné de 45° par rapport à la surface à calibrer, est mû parallèlement à lui-même le long de la surface, de manière à balayer celle-ci entièrement.Thus the lifting arm according to the invention can be used for the calibration of plates or blocks of hard mineral materials. Calibration is a surfacing operation during which the above-mentioned arm, contained in a plane inclined by 45 ° relative to the surface to be calibrated, is moved parallel to itself along the surface, so as to sweep it this entirely.

Claims (5)

1. Kerving arm on which there is tensioned an endless element (10) equipped externally with cutting tools (11) intended to carry out the kerving and winning of rocks and internally with guide blocks (12) capable of following a groove made along said arm, the endless element being set into rotation by a driving wheel (8) and a return wheel (9) having at their periphery crests (19) separated by indentations (18) intended to receive the aforementioned guide blocks (12), characterised in that the endless element (10) is a notched belt having crenellations (21) and in that the crests (19) are provided with teeth (20) in which the crenellations of the notched belt engage by resting therein, without the guide blocks (12) coming into contact with the wheels (8, 9) so as to transmit the moment of traction by means of all the fibres adjacent to the main fibres and not by means of the guide blocks (12).
2. Kerving arm according to claim 1, characterised in that the cutting tools (11) are brazed on a tool body (23) which is applied externally to the notched belt (10) and grips the notched belt with claws (27) folded into the lateral flanks of a block support (30) disposed against the internal face (31) of the notched belt (10).
3. Kerving arm according to claim 2, characterised in that the upper face (31) of the block support (30) has recesses (33) intended to receive the crenellations (21) of the notched belt (10).
4. Kerving arm according to any one of the preceding claims, characterised in that the lower portion of the guide block (12) carries an optionally removable sole (16) of synthetic material.
5. Kerving arm according to claim 4, characterised in that the body of the tool (23) and the sole (16) form a single part produced by moulding a synthetic material.
EP88870050A 1987-03-23 1988-03-22 Cutting jib Expired - Lifetime EP0284593B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88870050T ATE70890T1 (en) 1987-03-23 1988-03-22 SCRATCHING ARM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700290 1987-03-23
BE8700290A BE1000418A4 (en) 1987-03-23 1987-03-23 Cutting arm.

Publications (2)

Publication Number Publication Date
EP0284593A1 EP0284593A1 (en) 1988-09-28
EP0284593B1 true EP0284593B1 (en) 1991-12-27

Family

ID=3882581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88870050A Expired - Lifetime EP0284593B1 (en) 1987-03-23 1988-03-22 Cutting jib

Country Status (7)

Country Link
US (1) US4856719A (en)
EP (1) EP0284593B1 (en)
AT (1) ATE70890T1 (en)
BE (1) BE1000418A4 (en)
DE (1) DE3867101D1 (en)
ES (1) ES2029079T3 (en)
GR (1) GR3004132T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110796U1 (en) * 1991-07-16 1991-11-14 Maschinenfabrik Korfmann Gmbh, 5810 Witten Cutting arm for cutting machines for cutting hard rock
DE9108725U1 (en) * 1991-07-16 1992-11-19 Maschinenfabrik Korfmann Gmbh, 5810 Witten Cutting arm for cutting machines for cutting natural stone, concrete or similar.
JP4357402B2 (en) * 2004-10-18 2009-11-04 株式会社椿本チエイン Transport device
WO2015061132A1 (en) * 2013-10-22 2015-04-30 United Technologies Corporation Piloted retaining plate for a face seal arrangement

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2344750A (en) * 1942-11-27 1944-03-21 Goodman Mfg Co Cutter chain
US2354781A (en) * 1943-10-30 1944-08-01 Goodman Mfg Co Cutter chain and bit
US2664120A (en) * 1948-09-13 1953-12-29 C & H Dev Company Saw chain
US3604755A (en) * 1969-07-24 1971-09-14 Cincinnati Mine Machinery Co Cutter bar, cutter chain and sprocket assembly
BE865189A (en) * 1978-03-22 1978-07-17 Madrigali Luigi ROCK HAVING DEVICE
DE2961849D1 (en) * 1979-02-22 1982-03-04 Honore Joseph Lambot Rock cutter jib
DE3128264A1 (en) * 1981-07-17 1983-02-03 Maschinenfabrik Korfmann Gmbh, 5810 Witten ARMING ARM ON A MASTERING MACHINE
AU8752782A (en) * 1981-08-24 1983-03-03 Cornelis Johannes Maria Beerens Chain saw bar and sprocket
DE3209391A1 (en) * 1982-03-15 1983-09-22 Maschinenfabrik Korfmann Gmbh, 5810 Witten CUTTING TOOL FOR A SLEEVE CHAIN OR A SLEEVE BELT

Also Published As

Publication number Publication date
BE1000418A4 (en) 1988-12-06
EP0284593A1 (en) 1988-09-28
GR3004132T3 (en) 1993-03-31
ES2029079T3 (en) 1992-07-16
ATE70890T1 (en) 1992-01-15
US4856719A (en) 1989-08-15
DE3867101D1 (en) 1992-02-06

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