EP0014776A1 - Rock cutter jib - Google Patents

Rock cutter jib Download PDF

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Publication number
EP0014776A1
EP0014776A1 EP79200090A EP79200090A EP0014776A1 EP 0014776 A1 EP0014776 A1 EP 0014776A1 EP 79200090 A EP79200090 A EP 79200090A EP 79200090 A EP79200090 A EP 79200090A EP 0014776 A1 EP0014776 A1 EP 0014776A1
Authority
EP
European Patent Office
Prior art keywords
lifting arm
grooves
arm according
guide
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79200090A
Other languages
German (de)
French (fr)
Other versions
EP0014776B1 (en
Inventor
Honoré Joseph Lambot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Diamant Boart NV SA
Original Assignee
Lambot Honore Joseph
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lambot Honore Joseph filed Critical Lambot Honore Joseph
Priority to EP19790200090 priority Critical patent/EP0014776B1/en
Priority to DE7979200090T priority patent/DE2961849D1/en
Publication of EP0014776A1 publication Critical patent/EP0014776A1/en
Application granted granted Critical
Publication of EP0014776B1 publication Critical patent/EP0014776B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/12—Lubricating devices specially designed for chain saws
    • 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
    • B28D1/08—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws
    • B28D1/082—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws consisting of chain saws
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00

Definitions

  • the present invention relates to a lifting arm fitted to a rock lifting device.
  • the lifting arm comprises a chassis bordered by side rails, one upper and the other lower.
  • the ends of the chassis respectively carry rotary control and return wheels.
  • On these wheels is mounted an endless belt which externally carries cutting elements and internally guide shoes. These slide in corresponding grooves of these beams.
  • the chassis is made up of two adjacent frames which can be displaced relative to one another, perpendicularly or obliquely relative to the side members, under the action of jacks.
  • the frames can be immobilized selectively with respect to the rock under the action of other jacks acting on opposite lateral corners, retractable and applicable against the wall of a slot cut in this rock.
  • the first known lifting arms have the disadvantage of having a frame in two separate parts which can be moved individually. Therefore, this chassis requires the use of displacement cylinders to move its frames and the use of wedge cylinders to selectively wedge them relative to the rock. Consequently, the lifting arm is expensive both during its construction, which is otherwise complicated, and during its maintenance. In addition, the chassis has proven to be weak and too deformable in service, so that there is a risk of frequent blockages of the lifting arm in the rock.
  • the chassis is formed by a simple plate, the upper and lower edges of which extend along curvilinear lines which are less distant from each other on the side of the control wheel than on the side. of the idler wheel.
  • the edges of the plate are each provided with successive added guides together having a continuous guide rib.
  • the cutting elements are carried by the links of an endless metal chain mounted on two chain wheels rotating at the ends of the plate.
  • the chain in question has one link in two in the shape of an inverted U, the wings of which are arranged on either side of the aforementioned guide rib.
  • the second known lifting arms have a one-piece chassis but are equipped with an endless chain for carrying and conveying the cutting elements. This chain is expensive for construction and maintenance.
  • the object of the invention is a new particularly economical cutting arm / which is closer to the first known cases than to the second and makes it possible to overcome the aforementioned disadvantages of these two cases.
  • each guide shoe is made up of a block extending over the entire width of the above-mentioned grooves, the bottoms of which include water injectors bringing water flows thereon. spread out by the moving skids to form aquaplaning surfaces completely covering these bottoms.
  • these blocks are each made of synthetic material.
  • the anterior edge of the sliding face of each of these blocks against the bottom of the grooves is rounded.
  • these blocks In order to firmly secure the blocks of the guide shoes to the endless belt of the new lifting arm, these blocks each extend transversely over a much of the width of this belt.
  • these grooves are each delimited by the external face of the corresponding spar and by two side plates projecting from this face.
  • the guide shoes are engaged on the periphery of each of these wheels, between two lateral guide plates whose spacing distance is substantially equal to the width of the side member grooves.
  • the mounting face of the control wheel, on which the blocks of the guide shoes are successively applied is provided with a rough coating, for example of hard rubber.
  • the ends of these side members adjacent to this wheel include fixed combs extending these side members into circular grooves corresponding provided in this face for fitting this return wheel.
  • the lifting arm shown comprises a frame 1 in one piece in the form of a welded construction.
  • the frame of the chassis 1 essentially consists of an upper beam 2, a lower beam 3 and spacers 4.
  • the frame is covered on both sides by side plates 5 and 6.
  • the upper beam 2 is formed by an I-shaped beam whose inner and lower sole 7 is thicker than the outer and upper sole 8, which has an outer or upper face 9.
  • the lateral sheets 5 and 6 protrude upwards the face 9 of the spar 2, so as to form an upper groove 10 whose width is thus equal to that of this spar 2.
  • the upper spar 2 comprises upper injectors 11 mounted in the upper flange 8 and communicating respectively with the two opposite hollow spaces 12 and 13 delimited by this spar 2 and the sheets 5 and 6.
  • the space 12 is connected to a water supply in particular by a side supply pipe not shown, carried by the sheet 5 and by a flexible pipe also not drawn.
  • the space 13 is connected to the same water supply by analogous means. In this way, the upper injectors 11 can bring water to the upper face 9 of the spar 2.
  • the lower spar 3 is formed by an identical I-shaped beam but arranged inversely.
  • the inner and upper sole 14 is thicker than the outer or lower sole 15 which has an outer or lower face 16.
  • the side plates 5 and 6 project downwards above the face 16 above, so as to form a groove lower inverse to the previous 10.
  • the lower spar 3 is equipped with lower injectors identical to the previous 11 and mounted in the same way in the. lower sole 15.
  • the lower injectors communicate respectively with the two opposite hollow spaces which are delimited by the beam 3 and the sheets 5 and 6 and which are connected to the water supply by means similar to the aforesaid.
  • the lower injectors can bring water flush with the lower face 16 of the spar 3.
  • the chassis 1 carries a control wheel or pulley 17 rotating around a rotation axis 18 under the action of a motor 19.
  • the control wheel 17 comprises a solid web 20 which has a uniform thickness and which is mounted by screws 21 on a plate 22.
  • the plate 22 is mechanically connected to the output shaft of the motor 19, the casing of which is secured to the side plate 6 by conventional means.
  • the circumferential periphery of the web 20 is lined with a rough coating 23, for example of hard rubber.
  • the semi-circular ends of the side plates 5 and 6 exceed the covering 23 and therefore form therewith a hollow space 24 of rectangular radial section. This space 24 actually corresponds to the grooves of the side members 2 and 3 and is connected to these grooves.
  • the edges of the semi-circular ends of the sheets 5 and 6 carry a welded cover 25.
  • the opposite end of the frame 1 carries a wheel or a deflection pulley 26 freely rotating about an axis of rotation 27 parallel to the previous 18.
  • the deflection wheel 26 is formed by a ring 28 mounted via of a ball ring 29 on a fixed hub made up of two discs 30 and 31 joined together by screws 32 and at the corresponding semi-circular ends of the sheets 5 and 6 by other screws 33.
  • the construction and mounting of the return wheel 26 and the aforementioned hub are easily understood with reference to FIG. 4.
  • the semi-circular ends of the sheets 5 and 6 extend beyond the periphery of the ring 28 and therefore form therewith a hollow space 34 of section rectangular.
  • This space 34 corresponds to the grooves of the beams 2 and 3 and is also connected to the grooves in question, using combs 35 well illustrated in FIG. 6.
  • the combs 35 are fixed to the corresponding ends of the beams constituting the beams 2 and 3 and their teeth are engaged with play in appropriate circular grooves 36 of the periphery of the ring 28.
  • the belt 37 On the drive wheels 17 and return 26 is mounted an endless belt 37 having a flat rectangular section.
  • the belt 37 internally carries guide shoes 38 and externally clamping plates 39 provided with transverse cutting elements 40.
  • the belt 37 is therefore movable along the longitudinal members 2 and 3 under the action of the motor 19.
  • the guide shoes 38 are parallelepipipal blocks of synthetic material. Each block extends over a large part of the belt 37 and practically over the entire width of the side members 2 and 3. The anterior edge 41 of the face of the block, which is opposite to that placed against the belt 37. Is rounded thus that FIG. 5 clearly illustrates. Furthermore, each block is fixed to the belt 37 by fixing screws 42 inserting this belt 37 between this block and the clamping plate 39.
  • the cutting elements 40 are generally in diamond concretion and slightly protrude in transverse direction the clamping plate 39 and the belt 37.
  • the belt 37 is moved along the side rails 2 and 3 and around the control wheels 17 and the return wheel 26.
  • the guide shoes 38 then slide in the grooves of the side rails 2 and 3 and bear without sliding against the covering 23 of the wheel 17 and the ring 28 of the wheel 26, between the marginal parts of the side plates 5 and 6.
  • water flows are brought by the upper injectors 11 and lower on the end faces 9 and 16 of the beams of the side members 2 and 3.
  • the injected water flows are spread over the external faces 9 and 16 and form aquaplaning surfaces there substantially reducing the friction of these pads 38 against these faces 9 and 16. In this way, the energy absorbed for moving the belt 37 is largely used for cutting rocks by the cutting elements 40.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

1. A cutting arm for a rock cutting apparatus, comprising a frame structure (1) bordered by longitudinal members (2, 3), at the ends of which there are respectively mounted a drive wheel (17) and a return wheel (26) of an endless member (37) which externally carries cutting members (40) and which internally carries guide shoes (38) slidable in a groove (10), characterized in that the endless member comprises a belt (37) which internally carries guide shoes (38), each of which comprises a block extending over the entire width of said groove (10), the bottom (9 and 16) of which has injectors (11) for supplying a fluid which is spread out therein by the shoes (38) in movement thereof to form a layer of fluid which completely covers said groove (10), for permitting sliding movement of the shoes on said layer of fluid.

Description

La présente invention est relative à un bras haveur équipant un dispositif de havage de roches.The present invention relates to a lifting arm fitted to a rock lifting device.

Le bras haveur comprend un châssis bordé par des longerons l'un supérieur et l'autre inférieur. Les extrémités du châssis portent respectivement des roues rotatives de commande et de renvoi. Sur ces roues est montée une courroie sans fin qui porte extérieurement des éléments coupants et intérieurement des patins de guidage. Ceux-ci coulissent dans des rainures correspondantes de ces longerons.The lifting arm comprises a chassis bordered by side rails, one upper and the other lower. The ends of the chassis respectively carry rotary control and return wheels. On these wheels is mounted an endless belt which externally carries cutting elements and internally guide shoes. These slide in corresponding grooves of these beams.

Dans des premiers bras haveurs connus de ce genre, le châssis est constitué de deux cadres adjacents déplaçables l'un par rapport à l'autre,perpendiculairement ou obliquement par rapport aux longerons,sous l'action de vérins. Les cadres peuvent être immobilisés sélectivement par rapport à la roche sous l'action d'autres vérins agissant sur des coins latéraux opposés, rétractables et applicables contre la paroi d'une fente taillée dans cette roche.In first known lifting arms of this kind, the chassis is made up of two adjacent frames which can be displaced relative to one another, perpendicularly or obliquely relative to the side members, under the action of jacks. The frames can be immobilized selectively with respect to the rock under the action of other jacks acting on opposite lateral corners, retractable and applicable against the wall of a slot cut in this rock.

Les premiers bras haveurs connus présentent 1' inconvénient d'avoir un châssis en deux parties distinctes et déplaçables individuellement. De ce fait, ce châssis nécessite l'emploi de vérins de déplacement pour déplacer ses cadres et l'emploi de vérins de calage pour les caler sélectivement par rapport à la roche. Par conséquent, le bras haveur est coûteux tant lors de sa construction par ailleurs compliquée que lors de son entretien. De plus, le châssis s'est révélé peu solide et trop déformable en service en sorte de risquer d'occasionner des blocages fréquents du bras haveur dans la roche.The first known lifting arms have the disadvantage of having a frame in two separate parts which can be moved individually. Therefore, this chassis requires the use of displacement cylinders to move its frames and the use of wedge cylinders to selectively wedge them relative to the rock. Consequently, the lifting arm is expensive both during its construction, which is otherwise complicated, and during its maintenance. In addition, the chassis has proven to be weak and too deformable in service, so that there is a risk of frequent blockages of the lifting arm in the rock.

Dans des deuxièmes bras haveurs connus du même type, le châssis est formé par une simple plaque dont les bords supérieur et inférieur s'étendent suivant des lignes curvilignes moins distantes l'une de l'autre du côté de la roue de commande que du côté de la roue de renvoi. Les bords de la plaque sont pourvus chacun de guides successifs rapportés présentant ensemble une nervure continue de guidage. D'autre part, les éléments coupants sont portés par les maillons d'une chaîne métallique sans fin montés sur deux roues à chaîne tournant aux extrémités de la plaque. La chaîne en question présente un maillon sur deux en forme de U renversé dont les ailes sont disposées de part et d'autre de la nervure de guidage précitée.In known second lifting arms of the same type, the chassis is formed by a simple plate, the upper and lower edges of which extend along curvilinear lines which are less distant from each other on the side of the control wheel than on the side. of the idler wheel. The edges of the plate are each provided with successive added guides together having a continuous guide rib. On the other hand, the cutting elements are carried by the links of an endless metal chain mounted on two chain wheels rotating at the ends of the plate. The chain in question has one link in two in the shape of an inverted U, the wings of which are arranged on either side of the aforementioned guide rib.

.Les deuxièmes bras haveurs connus ont un châssis en une pièce mais sont équipés d'une chaîne sans fin pour porter et véhiculer les éléments coupants. Cette chaîne est onéreuse à la construction et à l'entretien..The second known lifting arms have a one-piece chassis but are equipped with an endless chain for carrying and conveying the cutting elements. This chain is expensive for construction and maintenance.

L'objet de l'invention est un nouveau bras haveur particulièrement économique/se rapprochant plus des premiers cas connus que des deuxièmes et permettant de parer aux désavantages précités de ces deux cas.The object of the invention is a new particularly economical cutting arm / which is closer to the first known cases than to the second and makes it possible to overcome the aforementioned disadvantages of these two cases.

A cet effet, dans le nouveau bras haveur, chaque patin de guidage est constitué d'un bloc s'étendant sur toute la largeur des rainures susdites dont les fonds comportent des injecteurs d'eau amenant sur eux des débits d'eau qui y sont étalés par les patins en mouvement pour former des surfaces d'aquaplaning recouvrant complètement ces fonds.To this end, in the new lifting arm, each guide shoe is made up of a block extending over the entire width of the above-mentioned grooves, the bottoms of which include water injectors bringing water flows thereon. spread out by the moving skids to form aquaplaning surfaces completely covering these bottoms.

Pour faciliter davantage le glissement des blocs des patins de guidage du nouveau bras haveur sur les surfaces d'aquaplaning des longerons, ces blocs sont chacun ' en matière synthétique. En outre, l'arête antérieure de la face de glissement de chacun de ces blocs contre le fond des rainures est arrondie.To further facilitate the sliding of the blocks of the guide pads of the new lifting arm on the aquaplaning surfaces of the side members, these blocks are each made of synthetic material. In addition, the anterior edge of the sliding face of each of these blocks against the bottom of the grooves is rounded.

Afin de solidariser fermement les blocs des patins de guidage à la courroie sans fin du nouveau bras haveur, ces blocs s'étendent chacun transversalement sur une grande partie de la largeur de cette courroie.In order to firmly secure the blocks of the guide shoes to the endless belt of the new lifting arm, these blocks each extend transversely over a much of the width of this belt.

Dans le but de construire facilement les rainures de guidage du nouveau bras haveur, ces rainures sont délimitées chacune par la face externe du longeron correspondant et par deux plaques latérales dépassant cette face.In order to easily build the guide grooves of the new lifting arm, these grooves are each delimited by the external face of the corresponding spar and by two side plates projecting from this face.

Pour guider efficacement la courroie sans fin par rapport aux roues de commande et de renvoi du nouveau bras haveur, les patins de guidage sont engagés sur la périphérie de chacune de ces roues, entre deux tôles latérales de guidage dont la distance d'écartement est sensiblement égale à la largeur des rainures des longerons.To effectively guide the endless belt with respect to the control and return wheels of the new lifting arm, the guide shoes are engaged on the periphery of each of these wheels, between two lateral guide plates whose spacing distance is substantially equal to the width of the side member grooves.

Avantageusement, dans le nouveau bras haveur, la face de pose de la roue de commande, sur laquelle les blocs des patins de guidage sont successivement appliqués, est garnie d'un revêtement rugueux par exemple en caoutchouc dur.Advantageously, in the new lifting arm, the mounting face of the control wheel, on which the blocks of the guide shoes are successively applied, is provided with a rough coating, for example of hard rubber.

Pour assurer la continuité entre le fond des rainures des longerons et la face de pose des blocs des patins de guidage dans la roue de renvoi, les extrémités de ces longerons adjacentes à cette roue,comprennent des peignes fixes prolongeant ces longerons jusque dans des gorges circulaires correspondantes prévues dans cette face de pose de cette roue de renvoi.To ensure continuity between the bottom of the grooves of the side members and the face for fitting the blocks of the guide shoes in the idler wheel, the ends of these side members adjacent to this wheel include fixed combs extending these side members into circular grooves corresponding provided in this face for fitting this return wheel.

D'autres détails et particularités de l'invention ressortiront de la description détaillée qui suit en référence aux dessins ci-annexés, dans lesquels :

  • - La figure 1 est une vue en élévation avec coupe partielle d'un bras haveur selon l'invention.
  • - Les figures 2, 3 et 4 sont des demi-coupes du bras haveur, faites respectivement suivant les plans II-II, III-III.et IV-IV de la figure précédente.
  • - La figure 5 est une vue en perspective partielle du bras haveur.
  • - La figure 6 est une vue en perspective partielle explosée .de l'extrémité d'un longeron et d'une partie de la roue de renvoi du bras haveur.
Other details and particularities of the invention will emerge from the detailed description which follows with reference to the attached drawings, in which:
  • - Figure 1 is an elevational view with partial section of a lifting arm according to the invention.
  • - Figures 2, 3 and 4 are half-sections of the lifting arm, made respectively along the planes II-II, III-III. And IV-IV of the previous figure.
  • - Figure 5 is a partial perspective view of the lifting arm.
  • - Figure 6 is an exploded partial perspective view of the end of a beam and part of the return wheel of the lifting arm.

Dans ces différentes figures, des mêmes notations de référence désignent des éléments identiques.In these different figures, the same reference notations designate identical elements.

Le bras haveur représenté comprend un châssis 1 en une seule pièce sous forme de construction soudée.The lifting arm shown comprises a frame 1 in one piece in the form of a welded construction.

L'ossature du châssis 1 est constituée essentiellement par un longeron supérieur 2, un longeron inférieur 3 et des entretoises 4. L'ossature est recouverte des deux côtés par des tôles latérales 5 et 6.The frame of the chassis 1 essentially consists of an upper beam 2, a lower beam 3 and spacers 4. The frame is covered on both sides by side plates 5 and 6.

Le longeron supérieur 2 est formé par une poutrelle en forme de I dont la semelle intérieure et inférieure 7 est plus épaisse que la semelle extérieure et supérieure 8, laquelle présente une face externe ou supérieure 9. Les tôles latérales 5 et 6 dépassent vers le haut la face 9 du longeron 2, en sorte de former une rainure supérieure 10 dont la largeur est ainsi égale à celle de ce longeron 2.The upper beam 2 is formed by an I-shaped beam whose inner and lower sole 7 is thicker than the outer and upper sole 8, which has an outer or upper face 9. The lateral sheets 5 and 6 protrude upwards the face 9 of the spar 2, so as to form an upper groove 10 whose width is thus equal to that of this spar 2.

Le longeron supérieur 2 comporte des injecteurs supérieurs 11 montés dans la semelle supérieure 8 et communiquant respectivement avec les deux espaces creux opposés 12 et 13 délimités par ce longeron 2 et les tôles 5 et 6. L'espace 12 est raccordé à une alimentation en eau notamment par une tubulure d'amenée latérale non représentée, portée par la tôle 5 et par un tuyau flexible également non dessiné. L'espace 13 est branché sur la même alimentation en eau par des moyens analogues. De la sorte, les injecteurs supérieurs 11 peuvent amener de l'eau sur la face supérieure 9 du longeron 2.The upper spar 2 comprises upper injectors 11 mounted in the upper flange 8 and communicating respectively with the two opposite hollow spaces 12 and 13 delimited by this spar 2 and the sheets 5 and 6. The space 12 is connected to a water supply in particular by a side supply pipe not shown, carried by the sheet 5 and by a flexible pipe also not drawn. The space 13 is connected to the same water supply by analogous means. In this way, the upper injectors 11 can bring water to the upper face 9 of the spar 2.

Semblablement, le longeron inférieur 3 est formé par une poutrelle identique en I mais disposée inversement. De ce fait, la semelle intérieure et supérieure 14 est plus épaisse que la semelle extérieure ou inférieure 15 qui présente une face externe ou inférieure 16. Les tôles latérales 5 et 6 dépassent vers le bas la face 16 précitée, de manière à former une rainure inférieure inverse à la précédente 10.Similarly, the lower spar 3 is formed by an identical I-shaped beam but arranged inversely. As a result, the inner and upper sole 14 is thicker than the outer or lower sole 15 which has an outer or lower face 16. The side plates 5 and 6 project downwards above the face 16 above, so as to form a groove lower inverse to the previous 10.

Tout comme le longeron supérieur 2, le longeron inférieur 3 est équipé d'injecteurs inférieurs identiques aux précédents 11 et montés de la même façon dans la . semelle inférieure 15. Les injecteurs inférieurs communiquent respectivement avec les deux espaces creux opposés qui sont délimités par le longeron 3 et les tôles 5 et 6 et qui sont raccordés à l'alimentation en eau par des moyens analogues aux précités. Ainsi, les injecteurs inférieurs peuvent amener de l'eau au ras de la face inférieure 16 du longeron 3.Like the upper spar 2, the lower spar 3 is equipped with lower injectors identical to the previous 11 and mounted in the same way in the. lower sole 15. The lower injectors communicate respectively with the two opposite hollow spaces which are delimited by the beam 3 and the sheets 5 and 6 and which are connected to the water supply by means similar to the aforesaid. Thus, the lower injectors can bring water flush with the lower face 16 of the spar 3.

Une extrémité du châssis 1 porte une roue ou une poulie de commande 17 tournant autour d'un axe de rotation 18 sous l'action d'un moteur 19. La roue de commande 17 comporte un voile plein 20 qui a une épaisseur uniforme et qui est monté par des vis 21 sur un plateau 22. Le plateau 22 est relié mécaniquement à l'arbre de sortie du moteur 19 dont le carter est solidarisé à la tôle latérale 6 par des moyens conventionnels. Le pourtour circonférentiel du voile 20 est garni d'un revêtement rugueux 23 par exemple en caoutchouc dur. Il est à noter que les extrémités demi-circulaires des tôles latérales 5 et 6 dépassent le recouvrement 23 et forment donc avec celui-ci un espace creux 24 de section radiale rectangulaire. Cet espace 24 correspond en fait aux rainures des longerons 2 et 3 et se raccorde à ces rainures. Comme protection, les bords des extrémités demi-circulaires des tôles 5 et 6 porte un capot 25 soudé.One end of the chassis 1 carries a control wheel or pulley 17 rotating around a rotation axis 18 under the action of a motor 19. The control wheel 17 comprises a solid web 20 which has a uniform thickness and which is mounted by screws 21 on a plate 22. The plate 22 is mechanically connected to the output shaft of the motor 19, the casing of which is secured to the side plate 6 by conventional means. The circumferential periphery of the web 20 is lined with a rough coating 23, for example of hard rubber. It should be noted that the semi-circular ends of the side plates 5 and 6 exceed the covering 23 and therefore form therewith a hollow space 24 of rectangular radial section. This space 24 actually corresponds to the grooves of the side members 2 and 3 and is connected to these grooves. As protection, the edges of the semi-circular ends of the sheets 5 and 6 carry a welded cover 25.

L'extrémité opposée du châssis 1 porte une roue ou une poulie de renvoi 26 tournant librement autour d'un axe de rotation 27 parallèle au précédent 18. En fait, la roue de renvoi 26 est formée par un anneau 28 monté par l'intermédiaire d'une couronne à billes 29 sur un moyeu fixe constitué de deux disques 30 et 31 solidarisés entre eux par des vis 32 et aux extrémités correspondantes demi-circulaires des tôles 5 et 6 par d'autres vis 33. La construction et le montage de la roue de renvoi 26 et du moyeu susdit se comprennent aisément en référence à la figure 4. Les extrémités demi-circulaires des tôles 5 et 6 dépassent la périphérie de l'anneau 28 et forment donc avec celui-ci un espace creux 34 de section rectangulaire.The opposite end of the frame 1 carries a wheel or a deflection pulley 26 freely rotating about an axis of rotation 27 parallel to the previous 18. In fact, the deflection wheel 26 is formed by a ring 28 mounted via of a ball ring 29 on a fixed hub made up of two discs 30 and 31 joined together by screws 32 and at the corresponding semi-circular ends of the sheets 5 and 6 by other screws 33. The construction and mounting of the return wheel 26 and the aforementioned hub are easily understood with reference to FIG. 4. The semi-circular ends of the sheets 5 and 6 extend beyond the periphery of the ring 28 and therefore form therewith a hollow space 34 of section rectangular.

Cet espace 34 correspond aux rainures des longerons 2 et 3 et se raccorde d'ailleurs aux rainures en question, grâce à des peignes 35 bien illustrés à la figure 6. Les peignes 35 sont fixés aux extrémités correspondantes des poutrelles constitutives des longerons 2 et 3 et leurs dents sont engagées avec jeu dans des gorges circulaires appropriées 36 de la périphérie de l'anneau 28.This space 34 corresponds to the grooves of the beams 2 and 3 and is also connected to the grooves in question, using combs 35 well illustrated in FIG. 6. The combs 35 are fixed to the corresponding ends of the beams constituting the beams 2 and 3 and their teeth are engaged with play in appropriate circular grooves 36 of the periphery of the ring 28.

Sur les roues de commande 17 et de renvoi 26 est montée une courroie sans fin 37 ayant une section rectangulaire plate. La courroie 37 porte intérieurement des patins de guidage 38 et extérieurement des plaques de serrage 39 pourvues d'éléments coupants transversaux 40. La courroie 37 est donc déplaçable le long des longerons 2 et 3 sous l'action du moteur 19.On the drive wheels 17 and return 26 is mounted an endless belt 37 having a flat rectangular section. The belt 37 internally carries guide shoes 38 and externally clamping plates 39 provided with transverse cutting elements 40. The belt 37 is therefore movable along the longitudinal members 2 and 3 under the action of the motor 19.

Les patins de guidage 38 sont des blocs parallé- lipipediques en matière synthétique. Chaque bloc s'étend sur une grande partie de la courroie 37 et pratiquement sur toute la largeur des longerons 2 et 3. L'arête antérieure 41 de la face du bloc,qui est opposée à celle placée contre la courroie 37.est arrondie ainsi que l'illustre bien la figure 5. Par ailleurs, chaque bloc est fixé à la courroie 37 par des vis de fixation 42 inserrant cette courroie 37 entre ce bloc et la plaque de serrage 39.The guide shoes 38 are parallelepipipal blocks of synthetic material. Each block extends over a large part of the belt 37 and practically over the entire width of the side members 2 and 3. The anterior edge 41 of the face of the block, which is opposite to that placed against the belt 37. Is rounded thus that FIG. 5 clearly illustrates. Furthermore, each block is fixed to the belt 37 by fixing screws 42 inserting this belt 37 between this block and the clamping plate 39.

Les éléments coupants 40 sont généralement en concrétion diamantée et dépassent légèrement en direction transversale la plaque de serrage 39 et la courroie 37.The cutting elements 40 are generally in diamond concretion and slightly protrude in transverse direction the clamping plate 39 and the belt 37.

En marche, la courroie 37 est déplacée le long des longerons 2 et 3 et autour des roues de commande 17 et de renvoi 26. Les patins de guidage 38 coulissent alors dans les rainures des longerons 2 et 3 et prennent appui sans glisser contre le recouvrement 23 de la roue 17 et l'anneau 28 de la roue 26, entre les parties marginales des tôles latérales 5 et 6. Simultanément au déplacement de la courroie 37, des débits d'eau sont amenés par les injecteurs supérieurs 11 et inférieurs sur les faces extrêmes 9 et 16 des poutrelles des longerons 2 et 3. Sous l'effet de la translation rapide des patins de guidage 38 dans les rainures susdites, les débits d'eau injectés sont étalés sur les faces externes 9 et 16 et y forment des surfaces d'aquaplaning réduisant sensiblement le frottement de ces patins 38 contre ces faces 9 et 16. De la sorte, l'énergie absorbée pour le déplacement de la courroie 37 est utilisée en grande partie pour la coupe des roches par les éléments coupants 40.In operation, the belt 37 is moved along the side rails 2 and 3 and around the control wheels 17 and the return wheel 26. The guide shoes 38 then slide in the grooves of the side rails 2 and 3 and bear without sliding against the covering 23 of the wheel 17 and the ring 28 of the wheel 26, between the marginal parts of the side plates 5 and 6. Simultaneously with the movement of the belt 37, water flows are brought by the upper injectors 11 and lower on the end faces 9 and 16 of the beams of the side members 2 and 3. Under the effect of the rapid translation of the guide shoes 38 in the aforementioned grooves, the injected water flows are spread over the external faces 9 and 16 and form aquaplaning surfaces there substantially reducing the friction of these pads 38 against these faces 9 and 16. In this way, the energy absorbed for moving the belt 37 is largely used for cutting rocks by the cutting elements 40.

Claims (8)

1. Bras haveur équipant un dispositif de havage de roches et comprenant un châssis bordé par des longerons l'un supérieur et l'autre inférieur, les extrémités du châssis portant respectivement des roues rotatives de commande et de renvoi sur lesquelles est montée une courroie sans fin portant extérieurement des éléments coupants et intérieurement des patins de guidage coulissant dans des rainures correspondantes de ces longerons, caractérisé en ce que chaque patin de guidage (38) est constitué d'un bloc s'étendant sur toute la largeur des rainures (10) susdites dont les fonds (9 et 16) comportent des injecteurs (11) amenant sur eux des débits d'eau qui y sont étalés par les patins (38) en mouvement pour former des surfaces d'aquaplaning recouvrant complètement ces fonds (9 et 16).1. Lifting arm fitted to a rock cutting device and comprising a chassis bordered by side rails, one upper and the other lower, the ends of the chassis carrying respectively control and deflection wheels on which is mounted a belt without end externally carrying cutting elements and internally guide shoes sliding in corresponding grooves of these beams, characterized in that each guide shoe (38) consists of a block extending over the entire width of the grooves (10) aforesaid whose bottoms (9 and 16) include injectors (11) bringing on them water flows which are spread there by the pads (38) in motion to form aquaplaning surfaces completely covering these bottoms (9 and 16 ). 2. Bras haveur selon la revendication 1, caractérisé en ce que le bloc de chaque patin de guidage (38) est en matière synthétique.2. Lifting arm according to claim 1, characterized in that the block of each guide shoe (38) is made of synthetic material. 3. Bras haveur selon la revendication 1 ou 2, caractérisé en ce que l'arête antérieure (41) de la face de glissement du bloc de chaque patin de guidage (38) contre le fond (9 et 16) des rainures (10) est arrondie.3. Lifting arm according to claim 1 or 2, characterized in that the front edge (41) of the sliding face of the block of each guide shoe (38) against the bottom (9 and 16) of the grooves (10) is rounded. 4. Bras haveur selon l'une ou l'autre des revendications 1 à 3, caractérisé en ce que le bloc de chaque patin de guidage (38) .s'étend transversalement sur une grande partie de la largeur de la courroie (37).4. Lifting arm according to either of claims 1 to 3, characterized in that the block of each guide shoe (38). Extends transversely over a large part of the width of the belt (37) . 5. Bras haveur selon l'une ou l'autre des revendications 1 à 4, caractérisé en ce que la rainure (10) du longeron supérieur (2), respectivement inférieur (3), est délimitée par la face externe (9),respectivement (16), de ce longeron et par deux plaques latérales (5 et 6) dépassant cette face (9), respectivement (16).5. Lifting arm according to either of claims 1 to 4, characterized in that the groove (10) of the upper beam (2), respectively lower (3), is delimited by the external face (9), respectively (16), of this spar and by two side plates (5 and 6) projecting from this face (9), respectively (16). 6. Bras haveur selon l'une ou l'autre des revendications 1 à 5, caractérisé en ce que les patins de guidage (38) sont engagés sur la périphérie de la roue de commande (17), respectivement de la roue de renvoi (26), entre deux tôles latérales de guidage (5) et (6) dont la distance d'écartement est sensiblement égale à la largeur des rainures (10) des longerons (2) et (3).6. Lifting arm according to either of claims 1 to 5, characterized in that the guide pads (38) are engaged on the periphery of the control wheel (17), respectively of the idler wheel ( 26), between two lateral guide plates (5) and (6), the spacing distance is substantially equal to the width of the grooves (10) of the side members (2) and (3). 7. Bras haveur selon l'une ou l'autre des revendications 1 à 6, caractérisé en ce que la face de pose de la roue de commande (17),sur laquelle les blocs des patins de guidage (38) sont successivement appliqués, est garnie d'un revêtement rugueux (23) par exemple en caoutchouc dur.7. Lifting arm according to either of claims 1 to 6, characterized in that the mounting face of the control wheel (17), on which the blocks of the guide shoes (38) are successively applied, is provided with a rough coating (23), for example of hard rubber. 8. Bras haveur selon l'une ou l'autre des revendications 6 et 7, caractérisé en ce que les extrémités des longerons (2) et (3) adjacentes à la roue de renvoi (26) comprennent des peignes fixes (35) prolongeant ces longerons (2) et (3) jusque dans des gorges circulaires correspondantes (36) prévues dans la face de pose des blocs des patins de guidage (38) dans cette roue (26).8. Cutter arm according to either of Claims 6 and 7, characterized in that the ends of the side members (2) and (3) adjacent to the idler wheel (26) comprise fixed combs (35) extending these longitudinal members (2) and (3) as far as corresponding circular grooves (36) provided in the face for placing the blocks of the guide shoes (38) in this wheel (26).
EP19790200090 1979-02-22 1979-02-22 Rock cutter jib Expired EP0014776B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19790200090 EP0014776B1 (en) 1979-02-22 1979-02-22 Rock cutter jib
DE7979200090T DE2961849D1 (en) 1979-02-22 1979-02-22 Rock cutter jib

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EP19790200090 EP0014776B1 (en) 1979-02-22 1979-02-22 Rock cutter jib

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EP0014776A1 true EP0014776A1 (en) 1980-09-03
EP0014776B1 EP0014776B1 (en) 1982-01-20

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070506A2 (en) * 1981-07-17 1983-01-26 Maschinenfabrik Korfmann GmbH Cutter-jib of a cutting machine
US4679541A (en) * 1984-10-05 1987-07-14 W. F. Meyers Company, Inc. Belt-configured saw for cutting slots into stone
EP0284593A1 (en) * 1987-03-23 1988-09-28 DIAMANT BOART Société Anonyme Cutting jib
DE3830047C1 (en) * 1988-09-03 1990-04-26 Maschinenfabrik Korfmann Gmbh, 5810 Witten, De
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.
WO1993000208A1 (en) * 1991-06-26 1993-01-07 W.F. Meyers Company, Inc. Stone slab saw
EP0527344A2 (en) * 1991-07-16 1993-02-17 Maschinenfabrik Korfmann GmbH Cutter jib for cutting machines for hard stone material
US20190301282A1 (en) * 2018-03-29 2019-10-03 Diamond Stone Technologies Inc. Device and method for cutting quarry stone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6306372B1 (en) 2000-06-21 2001-10-23 Noville Inc. Oral hygiene compositions which mask the burn sensation and the astringency of eucalyptol and zinc

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GB559380A (en) * 1942-08-14 1944-02-16 Thomas David Jones Means for reduction or suppression of dust in coal-cutting
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070506A3 (en) * 1981-07-17 1985-10-30 Maschinenfabrik Korfmann GmbH Cutter-jib of a cutting machine
EP0070506A2 (en) * 1981-07-17 1983-01-26 Maschinenfabrik Korfmann GmbH Cutter-jib of a cutting machine
US4679541A (en) * 1984-10-05 1987-07-14 W. F. Meyers Company, Inc. Belt-configured saw for cutting slots into stone
EP0284593A1 (en) * 1987-03-23 1988-09-28 DIAMANT BOART Société Anonyme Cutting jib
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DE3830047C1 (en) * 1988-09-03 1990-04-26 Maschinenfabrik Korfmann Gmbh, 5810 Witten, De
US5181503A (en) * 1991-06-26 1993-01-26 W. F. Meyers Company, Inc. Stone slab saw
WO1993000208A1 (en) * 1991-06-26 1993-01-07 W.F. Meyers Company, Inc. Stone slab saw
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.
EP0527344A2 (en) * 1991-07-16 1993-02-17 Maschinenfabrik Korfmann GmbH Cutter jib for cutting machines for hard stone material
EP0527344A3 (en) * 1991-07-16 1993-04-14 Maschinenfabrik Korfmann GmbH Cutter jib for cutting machines for hard stone material
US20190301282A1 (en) * 2018-03-29 2019-10-03 Diamond Stone Technologies Inc. Device and method for cutting quarry stone
US10526891B2 (en) * 2018-03-29 2020-01-07 Diamond Stone Technologies Inc. Device and method for cutting quarry stone

Also Published As

Publication number Publication date
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EP0014776B1 (en) 1982-01-20

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