EP1748108B1 - Bohrschnecke - Google Patents

Bohrschnecke Download PDF

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Publication number
EP1748108B1
EP1748108B1 EP06117715A EP06117715A EP1748108B1 EP 1748108 B1 EP1748108 B1 EP 1748108B1 EP 06117715 A EP06117715 A EP 06117715A EP 06117715 A EP06117715 A EP 06117715A EP 1748108 B1 EP1748108 B1 EP 1748108B1
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EP
European Patent Office
Prior art keywords
auger
core
gouge
movable
translation
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.)
Active
Application number
EP06117715A
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English (en)
French (fr)
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EP1748108A1 (de
Inventor
Daniel Perpezat
Philippe Chagnot
Régis Bernazinski
Lewis Stansfield
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.)
Soletanche Freyssinet SA
Original Assignee
Soletanche Freyssinet SA
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.)
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Priority claimed from FR0508057A external-priority patent/FR2889241B1/fr
Priority claimed from GB0607612A external-priority patent/GB2440939B/en
Application filed by Soletanche Freyssinet SA filed Critical Soletanche Freyssinet SA
Priority to PL06117715T priority Critical patent/PL1748108T3/pl
Publication of EP1748108A1 publication Critical patent/EP1748108A1/de
Application granted granted Critical
Publication of EP1748108B1 publication Critical patent/EP1748108B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes

Definitions

  • the present invention relates to a mobile pin auger.
  • the auger For the production of drilled or molded piles, it is most often used as an auger tool that allows to dig into the ground a cylindrical excavation corresponding to the dimensions of the pile to be made and which also allows the recovery of the ground dug or cut.
  • the auger is equipped with a dip tube which is slidably mounted in the hollow core of the auger and which allows to inject into the borehole, as and when the auger is raised, concrete or grout used to make the stake.
  • the forces that can absorb the molded or drilled pile depend on the one hand of the diameter of the latter and on the other hand the coefficient of friction that exists between the outer wall of the pile and the inner wall of the borehole.
  • the increase in the diameter of the pile leads to an increase in the cost of drilling and especially an increase in the amount of grout or concrete to be used to make the pile. It is therefore understood that it is advantageous, to increase the efficiency of the pile, to improve the coefficient of friction between the pile and the ground. For this, it is known to make, using a pin, a helical groove in the inner wall of the borehole which will subsequently be filled as the drilling by concrete or grout to form a helical rib penetrating into the ground .
  • the reference 10 representing the cylindrical bore
  • the reference 12 representing the inner wall of this bore
  • the reference 14 representing the helical groove formed in the wall 12 of the borehole.
  • This figure also shows the pile 16 with its helical rib 18 penetrating the soil S.
  • the lower end of the auger blade is usually equipped with a lug.
  • this lug is fixed, that is to say that it makes a groove in the direction of the descent and the ascent of the auger. This is what is described in the patent EP 1 277 887 on behalf of COMPAGNIE DU SOL.
  • COMPAGNIE DU SOL To obtain a high quality of this groove, that is to say an effective compaction of the walls of the rib, it is necessary in particular to precisely control the rotational speed and linear displacement of the auger on the descent and especially at the ascent.
  • An object of the present invention is to provide an auger equipped with a movable pin for which we can ensure the effective output of the pin during the recovery of the auger reliably and holding the pin in this position.
  • the auger is characterized in that said additional member is a tubular element extending over the entire length of the core of the auger and whose upper end is connected to a duct. a supply of pressurized liquid and the inner end of which is provided with at least one orifice for injection into the borehole
  • the auger is characterized in that said tubular element is movable in translation in said core and in that said control means causes the displacement of the lug from its retracted position to its active position. response to the translational movement of said tubular member.
  • the auger is characterized in that said tubular element is rotatable in said core and in that said control means causes the displacement of the lug from its retracted position to its active position. response to rotation of said tubular member.
  • the auger is preferably characterized in that said tubular element is a dip tube which is movable in translation in said hollow core between a retracted position in which the lower end of the dip tube closes. lower end of the auger core and an extended position in which the lower end of the dip tube protrudes out of the lower end of the auger.
  • the auger is characterized in that said additional member is a portion of tube mounted to move in translation and / or in rotation in the hollow core of the auger, at its lower end.
  • the auger is characterized in that said tube portion is mounted to move in translation inside the core of the auger and in that said control means cause the displacement of the pin from its retracted position to its active position in response to the displacement of the tube portion.
  • the auger is characterized in that said tube portion is rotatable inside the core of the auger and in that said control means cause the displacement of the pin from its retracted position to its active position in response to rotation of said tube portion.
  • the auger is characterized in that the core of said auger comprises an upper part and a lower part movable in translation relative to said upper part over a predetermined length, said lug being mounted on said lower part, in that said additional member comprises a tubular piece integral with the lower end of the upper part of said core and penetrating inside said lower part of the hollow core, and in that said control means are mounted on said tubular member such that the relative displacement in translation of said lower portion of the core and said tubular member causes the displacement of the lug from its retracted position to its active position.
  • FIG. 2 we will describe the entire drilling machine with the ergot auger.
  • the platform 20 with its articulated guide post 22 controlled symbolically by the cylinders 24.
  • the carriage 26 can be moved along the mast 22 by means not shown. It is thus possible to control on the one hand the rotational speed of the auger by means of the rotation head 28 and on the other hand the linear displacement speed of the auger by controlling the displacement of the carriage 26 with respect to the mast 22.
  • the auger 30 is constituted by a hollow cylindrical core 32 and by two helical blades 34 and 36 angularly offset by 180 degrees.
  • the core 32 ends with a point 35.
  • the leading edges 34a and 36a of the blades are equipped with teeth such as 38.
  • the additional member is a tubular piece which extends over the entire length of the core of the auger and which is preferably a dip tube.
  • the auger tubes are well known drilling machines and in particular described in the patent application FR 2,807,455 on behalf of the applicant, which should be considered an integral part of this description.
  • the auger with a hollow core in which can move in translation a so-called tube dip tube whose upper end is connected by a hose to a source of grout or cement or more generally a loaded liquid and whose Inner end may protrude out of the lower end of the auger to allow injection, through orifices, grout or concrete into the auger borehole.
  • the plunger tube can be moved in translation relative to the auger using, for example, cylinders mounted on the auger rotation head and, most often, the dip tube can also be rotated about its longitudinal axis relative to the auger.
  • the relative movement of said dip tube with respect to the auger is used to control the motor means of the mobile pin.
  • the lower part of the auger 30 is shown with its core 32, its blades 34 and 36 and its pivot pin 42.
  • a dip tube 100 whose lower end is closed by a tapered tip 102.
  • the dip tube has a plurality of orifices 104 to allow the exit of the grout or cement.
  • the plunger tube 100 is in the raised position inside the core of the auger 32, the plunger tube and the auger are integral in rotation.
  • the lower face 32a of the core 32 of the auger is provided with notches such as 106 which can cooperate with jaws 108 provided on the periphery of the lower end of the dip tube, that is to say immediately above its end 102.
  • the auger and the plunger tube are integral in rotation.
  • the plunger tube when the plunger tube is in the extended position to allow the injection of concrete, cement or grout, the lower end of the plunger tube 100 occupies a position such that the orifices 104 are disengaged and of course the jaws 108 are out of the notches 106.
  • movable pistons such as 110 are mounted in the notches 106.
  • the end 32a of the core of the auger may comprise four notches 106, in each notch two movable pistons 110 being mounted.
  • each piston 110 is constituted by a rod 112 capable of receiving the action of the claws 108 by its first end 112a while its second end 112b cooperates with a return spring 114.
  • a piston 116 mounted movably in a cylindrical chamber 118 filled with an incompressible liquid.
  • the piston 116 divides the cylinder 118 into two chambers respectively 120 and 122.
  • Each chamber is connected by a pipe 124, 126 to a control cylinder 128 and 130.
  • the control cylinders 128 and 130 act on both sides of the cylinder.
  • pivot axis 44 of the lug 42 for respectively bringing the lug in the output position or in the retracted position.
  • FIGS. 6, 7 and 8 illustrate a second embodiment of the invention.
  • a rotational movement of the dip tube relative to the auger is used to control the motor means of the movable pin.
  • an additional motor 140 which allows to cause a rotational movement of the plunger tube 100 relative to the core 32 of the auger. More specifically, this possibility of rotation is limited by two stops 142 and 144 formed at the upper end of the core 32 of the auger and by an extension 146 secured to the outer face of the upper end 100a of the dip tube.
  • the plunger tube 100 can be brought into a first position in which the extension 146 is in contact with the abutment 142 and a second position in which the extension 146 is in contact with the second abutment 144 .
  • the plunger tube 100 has a recessed portion 150 relative to its outer wall 100b which is also visible on the Figures 8A and 8B .
  • This recess portion 150 constitutes a rotary cam about the longitudinal axis X, X 'of the dip tube and the core 32 of the auger.
  • At the mobile pin 42 are mounted two pushers 152 and 154 movable in translation in holes 156 and 158 formed in the core 32 of the auger. The first ends of the pushers are in contact with the outer face of the dip tube 100 while their second ends are in contact with the control portion of the mobile pin 42 on either side of its pivot axis 44.
  • the pusher 152 In the first angular position of the dip tube 100, the pusher 152 is in contact with the outer wall 100b of the dip tube while the pusher 154 is in contact with the recess 150, which causes the mobile pin 42 to be in the extended position ( figure 8A ).
  • the second angular position it is the first pusher 152 which in contact with the recess 150, while the second pusher 154 is in contact with the outer wall 100b of the plunger tube 100. the lug 42 in its retracted position.
  • the control member essentially consists of a toothed ring 160 which surrounds the plunger tube 100 and which is free to rotate relative thereto but immobilized in vertical translation relative to the plunger tube.
  • the ring 160 is integral with a control finger 162 which penetrates into a helical slot 164 formed in the corresponding portion of the plunger tube and which constitutes a cam.
  • the helical slot formed in the dip tube is preceded by a vertical slot which is therefore without effect on the ring.
  • the toothed portion of the rotary ring 162 cooperates with a control portion 42a of the movable pin 42 which is also toothed.
  • the meshing between the toothed portion of the ring 162 and the control portion 42a of the lug 42 is via a slot 166 formed in the lower part of the hollow core 32 of the auger.
  • the relative displacements (rotation or translation) of the plunger tube with respect to the core of the auger will be used instead to detect that the lug 42 has been brought into the extended position. Indeed, these movements can easily be detected at the upper end of the auger.
  • FIG. 11A and 11B a third embodiment of the invention will be described. It corresponds to the case where the auger 30 is not equipped with a tubular element extending over the entire length of the core of the auger. The injection of grout or concrete into the borehole is then performed by feeding the hollow core 32 of the auger with this product.
  • the lower end of the auger is equipped with a moving part 170 constituted by a portion of tube 172 of reduced length relative to the length of the auger and closed at its lower end by a bottom 174 of conical shape that forms the tip of the auger.
  • the portion of tube 172 is free in translation in the hollow core of the auger and provided with orifices 176 for the outlet of the grout or concrete.
  • the movable member 170 is in the retracted position in the auger, the movable piece is rotatably secured thereto by claws 178 and notches 180 formed in the lower edge of the core 32 of the auger.
  • the moving part 170 During the descent movement of the auger, which corresponds to the digging of the borehole, the moving part 170 is held back into the core of the auger ( figure 11A ).
  • the auger when the auger is raised and a grout or concrete is injected into the hollow core thereof, the pressure of the material on the moving part 170 as well as the action of the surrounding ground cause relative movement. of translation of the moving part 170 relative to the core of the auger, the amplitude of this relative movement is limited for example by stops (not shown in the figures). This is what is represented on the Figure 11B .
  • This result can also be obtained by interposing a spring between the core of the auger and the moving part. During the descent movement of the auger, the spring is compressed. When initiating the upward movement, the spring relaxes and causes the output of the moving part.
  • This relative translation movement serves to control the pivoting of the lug 42 by motor means symbolically represented by the reference 181.
  • the control means may be of the type illustrated by the Figures 6 to 8 (hydraulic) or the type illustrated by the Figures 9 and 10 (mechanical), the tube portion 172 of the moving part replacing the dip tube.
  • the figure 12 illustrates a fourth embodiment of the invention.
  • the auger 30 is equipped with a moving part 170 slidably mounted in the hollow core 32 of the auger.
  • the difference with the third embodiment consists in the fact that the outer face of the portion of the tube 172 and the lower end of the inner face of the hollow core 32 of the auger comprise conjugate reliefs 182 capable of converting the movement relative translation of the movable part 170 relative to the core of the auger, during the ascent thereof, in a rotational movement. It is this movement that is used to control the movement of the pin 42.
  • control means symbolized by the reference 184 can then be of the type represented on the Figures 6 and 8 , the tube portion 172 replacing the dip tube.
  • the movable pin is rotated to move from its retracted position to its active or output position.
  • control means could be arranged so that the movable pin is driven in a translational movement in a radial direction relative to the axis of the soul of the auger.
  • the auger is constituted by a cutting head 220 which is mounted at the lower end of a hollow drill string, these rods being provided with an external helical blade.
  • the cutting head 220 which allows the movement of the lug 240 will be considered.
  • the movement of the lug is a movement in translation in a radial direction substantially orthogonal to the lug. longitudinal axis of the cutting head 220. It goes without saying that, by a simple modification within the reach of ordinary skill in the art, this movement could be a pivoting movement about an axis connected to the head of the art. chopped off.
  • the cutting head 220 comprises an upper portion 222 and a lower portion 224.
  • the lower end 222b of the cutting head is connected to a blade stem string by connecting means 226.
  • the lower end 222b of the part upper part is extended downwards by a tubular extension 228.
  • the upper part 222 is constituted by a cylindrical body 230 and a blade 232.
  • the lower portion 224 has the general shape of a cylindrical hollow rod 234 provided with a blade 236.
  • the extension 218 of the lower portion 222 is slidably mounted in the hollow rod 234 of the lower portion 224.
  • the lower part 224 is connected to the upper part 222 by connecting means 238.
  • the connecting means 238 rotate integrally with the parts 222 and 224 and allow a relative movement in translation of the parts 222 and 224 of limited amplitude.
  • the lower end 224a of the lower portion 224 is provided with a movable lug (or cutting tooth) 240.
  • the lug 240 is connected to displacement means 242 for moving the lug.
  • the lower end 228a of the tubular end 228 is provided with control means 244.
  • the control means 244 cooperate with the displacement means 242.
  • the lug 240 is in its retracted position shown on the figure 13 . This corresponds to the descent movement of the auger.
  • the control means 244 act on the displacement means 242 to bring the pin 240 into its output position and keep it there. This corresponds to the lift movement of the auger.
  • connection means 238 a preferred embodiment of connection means 238 will be described.
  • the upper end 234a of the hollow rod 234 is integral with a female hexagonal connection box 246.
  • the lower end 222b of the upper portion 222 is secured to the upper portion 248a of a hexagonal drive male member 248
  • the lower end 248b of the male member 248 is integral with the upper end 228b of the extension 228.
  • the male and female members 246 are integral in rotation.
  • the upper end 246a of the female member is provided with a retaining ring 250 integral with the female drive box 246 and protrudes from the inner wall 246c of the drive box 246.
  • the outer wall 248c of the male member 248 is provided with a shoulder 252 which cooperates with the retaining ring 250.
  • a protected volume 254 is limited by the blade propeller 256, a side wall 258 and a bottom plate 259.
  • a horizontal axis guide tube 260 is fixed on the rod 234 of the lower part 224.
  • the tube 260 extends radially.
  • a piston 262 is slidably mounted in this tube.
  • the lug 240 is attached to a first end 262a of the piston.
  • the second end of the piston has the shape of an inclined surface 264.
  • the lower end of the rod 234 is provided with a slot 266 in which a wedge-shaped controller 268 can move vertically.
  • the wedge 268 is attached to the lower end of the extension 228.
  • a vertical movement of the extension 228 is converted into a horizontal movement of the lug 240 by the cooperation of the surface 264 and the wedge 268.
  • a return system consisting of the lever 270 connected to the piston 262 and a return spring 272 causes the withdrawal of the lug 240.

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Claims (17)

  1. Bohrer (30) zum Herstellen einer Bohrung, die in ihrer Innenwand eine im wesentlichen schraubenförmige Rille (36) aufweist, wobei der Bohrer aufweist:
    - eine Hohlseele (100) mit einer Längsachse,
    - mindestens eine schraubenförmige Schaufel (34), die auf der Außenseite der Seele installiert ist, und
    - einen beweglichen Schneiddorn (42), der eine aktive Position einnehmen kann, in der der Dorn aus dem Volumen heraussteht, das von dem Umfang der Schaufel abgegrenzt wird, und eine eingefahrene Position, in der er im Inneren des Volumens angeordnet ist, und
    - Mittel (152, 154) zum Verlagern des Dorns von seiner eingefahrenen Position zu seiner aktiven Position,
    wobei der Bohrer dadurch gekennzeichnet ist, daß:
    - sich die schraubenförmige Schaufel auf mindestens einem wesentlichen Teil der Länge der Seele erstreckt,
    - die Verlagerungsmittel aufweisen:
    • ein zusätzliches Organ (150), das in der Seele translatorisch entlang der Längsachse und/oder in Drehung um die Längsachse beweglich und mindestens am unteren Ende der Seele angeordnet ist, und
    • ein Steuermittel (162), um das Bewegen des Dorns von seiner eingefahrenen Position zu seiner aktiven Position als Reaktion auf die relative Bewegung des zusätzlichen Organs in bezug zu mindestens dem unteren Teil der Hohlseele zu veranlassen.
  2. Bohrer (30) nach Anspruch 1, dadurch gekennzeichnet, daß das zusätzliche Organ (150) ein röhrenförmiges Element ist, das sich auf der ganzen Länge der Seele des Bohrers erstreckt und dessen oberes Ende an eine Leitung zum Versorgen mit Flüssigkeit, die unter Druck geladen wird, angeschlossen ist, und dessen unteres Ende mit mindestens einer Öffnung versehen ist, um das Einspritzen in die Bohrung zu erlauben.
  3. Bohrer (30) nach Anspruch 2, dadurch gekennzeichnet, daß das röhrenförmige Element (150) translatorisch in der Seele beweglich ist und daß das Steuermittel (162) das Verlagern des Dorns von seiner eingefahrenen Position zu seiner aktiven Position als Reaktion auf die Translationsbewegung des röhrenförmigen Elements veranlaßt.
  4. Bohrer (30) nach Anspruch 2, dadurch gekennzeichnet, daß das röhrenförmige Element (150) rotatorisch in der Seele beweglich ist und daß das Steuermittel das Verlagern des Dorns von seiner eingefahrenen Position zu seiner aktiven Position als Reaktion auf die Rotation des röhrenförmigen Elements veranlaßt.
  5. Bohrer (30) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das röhrenförmige Element (150) ein Tauchrohr ist, das translatorisch in der Hohlseele zwischen einer eingefahrenen Position, in der das untere Ende des Rohrs das untere Ende der Seele des Bohrers verschließt, und einer ausgefahrenen Position, in der das untere Ende des Tauchrohrs aus dem unteren Ende des Bohrers (30) vorsteht, beweglich ist.
  6. Bohrer (30) nach Anspruch 5, dadurch gekennzeichnet, daß der Dorn (42) um eine im wesentlichen zu der Achse der Seele (100) parallele Achse schwenkbar ist und daß die Steuermittel (162) einen beweglichen Kolben (240) aufweisen, der an dem unteren Ende der Seele des Bohrers montiert ist, der eine erste Position für eine erste relative Position des Tauchrohrs in bezug zu der Seele des Bohrers und eine zweite Position für eine zweite relative Position des Tauchrohrs (150) in bezug zu der Seele des Bohrers belegt, wobei der Kolben in seiner ersten Position einen ersten Zylinder versorgt, der auf den beweglichen Dorn einwirkt, um diesen in seine erste Position zu bringen, und in seiner zweiten Position einen zweiten Zylinder versorgt, der auf den beweglichen Dorn (42) einwirkt, um diesen in seine zweite Position zu bringen.
  7. Bohrer (30) nach Anspruch 5, dadurch gekennzeichnet, daß der Dorn (42) um eine Achse schwenkbar montiert ist, die im wesentlichen zu der Achse der Seele (100) parallel ist, und daß die Steuermittel (162) einen Ring aufweisen, der um das Tauchrohr (150) drehend montiert und in Verschiebung in bezug zu der Seele des Bohrers unbeweglich ist, wobei der Ring fest mit einem Steuerfinger verbunden ist, der mit einer schraubenförmigen Spalte zusammenwirken kann, die in dem Tauchrohr oder dem beweglichen Teil eingerichtet ist, und wodurch die Verschiebung des Tauchrohrs oder des beweglichen Teils in eine Drehung des Rings umgewandelt wird, wobei der Ring mindestens einen Zahnabschnitt aufweist, der mit einem Zahnabschnitt des beweglichen Dorns zusammenwirken kann.
  8. Bohrer (30) nach Anspruch 5, dadurch gekennzeichnet, daß der Dorn (42) um eine Achse schwenkbar montiert ist, die im wesentlichen zu der Achse der Seele (100) parallel ist, und daß das Tauchrohr (150) rotatorisch beweglich ist und daß die Steuermittel (162) einen Vertiefungsabschnitt, der in der Außenseite des Tauchrohrs (150) auf einem Teil seines Umfangs hergestellt ist, und zwei Stößel (152, 154) aufweisen, die in der Seele (100) des Bohrers (30) gleitend montiert sind, wobei jeder Stößel ein erstes Ende mit der Außenseite des Tauchrohrs (150) oder des beweglichen Teils in Berührung hat und ein zweites Ende in Berührung mit dem beweglichen Dorn (42), wodurch die relative Drehung des Tauchrohrs (150) in bezug zu der Seele des Bohrers Verlagerungen der Stößel veranlaßt, um das Drehen des beweglichen Dorns in die eine oder die andere Richtung zu steuern.
  9. Bohrer (30) nach Anspruch 1, dadurch gekennzeichnet, daß das zusätzliche Organ (150) ein Rohrabschnitt ist, der translatorisch und/oder rotatorisch in der Hohlseele (100) des Bohrers (30) an deren unterem Ende beweglich montiert ist.
  10. Bohrer (30) nach Anspruch 9, dadurch gekennzeichnet, daß der Rohrabschnitt translatorisch im Inneren der Seele (100) des Bohrers beweglich montiert ist und daß die Steuermittel (162) das Bewegen des Dorns (42) von seiner eingefahrenen Position zu seiner aktiven Position als Reaktion auf das Verlagern des Rohrabschnitts veranlassen.
  11. Bohrer (30) nach Anspruch 10, dadurch gekennzeichnet, daß die Steuermittel (162) einen beweglichen Kolben (240) aufweisen, der an dem unteren Ende der Seele des Bohrers montiert ist, der eine erste Position für eine erste relative Position des Rohrabschnitts in bezug zu der Seele des Bohrers und eine zweite Position für eine zweite relative Position des Rohrabschnitts in bezug zu der Seele des Bohrers belegt, wobei der Kolben (240) in seiner ersten Position einen ersten Zylinder versorgt, der auf den beweglichen Dorn (42) einwirkt, um diesen in seine erste Position zu bringen, und in seiner zweiten Position einen zweiten Zylinder versorgt, der auf den beweglichen Dorn (42) einwirkt, um diesen in seine zweite Position zu bringen.
  12. Bohrer (30) nach Anspruch 10, dadurch gekennzeichnet, daß der Dorn (42) um eine Achse schwenkbar montiert ist, die im wesentlichen zu der Achse der Seele (100) parallel ist, und daß die Steuermittel (162) einen Ring aufweisen, der um den Rohrabschnitt drehbar und in Verschiebung in bezug zu der Seele (100) des Bohrers stationär montiert ist, wobei der Ring fest mit einem Steuerfinger verbunden ist, der mit einer schraubenförmigen Spalte zusammenwirken kann, die in dem beweglichen Rohrabschnitt eingerichtet ist, wodurch die Verschiebung des Tauchrohrs oder des beweglichen Teils in eine Drehung des Rings umgewandelt wird, wobei der Ring mindestens einen Zahnabschnitt aufweist, der mit einem Zahnabschnitt des beweglichen Dorns zusammenwirken kann.
  13. Bohrer (30) nach Anspruch 9, dadurch gekennzeichnet, daß der Rohrabschnitt rotatorisch im Inneren der Seele (100) des Bohrers beweglich ist und daß die Steuermittel (162) das Verlagern des Dorns (42) von seiner eingefahrenen Position zu seiner aktiven Position als Reaktion auf die Drehung des Rohrabschnitts veranlassen.
  14. Bohrer (30) nach Anspruch 10, dadurch gekennzeichnet, daß der Dorn (42) um eine Achse schwenkbar montiert ist, die im wesentlichen zu der Achse der Seele (100) parallel ist, und daß die Steuermittel (162) einen Vertiefungsabschnitt, der in der Außenseite des Rohrabschnitts auf einem Teil seines Umfangs hergestellt ist, und zwei Stößel (152, 154) aufweisen, die in der Seele (100) des Bohrers gleitend montiert sind, wobei jeder Stößel ein erstes Ende, das mit der Außenseite des Rohrabschnitts in Berührung ist, und ein zweites Ende in Berührung mit dem beweglichen Dorn hat, wodurch die relative Drehung des Rohrabschnitts in bezug zu der Seele des Bohrers Verlagerungen der Stößel veranlaßt wird, um die Drehung des beweglichen Dorns (42) in die eine oder die andere Richtung zu veranlassen.
  15. Bohrer (30) nach Anspruch 1, dadurch gekennzeichnet, daß die Seele (100) des Bohrers (30) einen oberen Teil und einen unteren Teil aufweist, der translatorisch in bezug zu dem oberen Teil auf einer vorbestimmten Länge beweglich ist, wobei der Dorn (42) auf dem unteren Teil montiert ist, und daß das zusätzliche Organ (162) einen röhrenförmigen Teil aufweist, der fest mit dem unteren Ende des oberen Teils der Seele verbunden ist und in das Innere des unteren Teils der Hohlseele eindringt, und daß die Steuermittel auf dem röhrenförmigen Teil derart montiert sind, daß die relative Verlagerung in Verschiebung des unteren Teils der Seele und des röhrenförmigen Teils das Verlagern des Dorns von seiner eingefahrenen zu seiner aktiven Position veranlaßt.
  16. Bohrer (30) nach Anspruch 15, dadurch gekennzeichnet, daß er ferner Mittel zum drehfesten Verbinden des oberen und des unteren Teils der Seele aufweist.
  17. Bohrer (30) nach Anspruch 16, dadurch gekennzeichnet, daß der Dorn (42) translatorisch entlang einer radialen Richtung beweglich ist.
EP06117715A 2005-07-28 2006-07-24 Bohrschnecke Active EP1748108B1 (de)

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FR0508057A FR2889241B1 (fr) 2005-07-28 2005-07-28 Tariere a ergot mobile
GB0607612A GB2440939B (en) 2006-04-18 2006-04-18 Cutting head provided with threading means

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EP2326786B1 (de) 2008-09-08 2018-04-11 Sinvent AS Vorrichtung und verfahren zur veränderung der seitenwände eines bohrloches
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KR101355053B1 (ko) 2014-01-24
ATE480670T1 (de) 2010-09-15
EP1748108A1 (de) 2007-01-31
KR20070015015A (ko) 2007-02-01
PL1748108T3 (pl) 2011-03-31
DE602006016690D1 (de) 2010-10-21
US20070023207A1 (en) 2007-02-01
US7591329B2 (en) 2009-09-22

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