The invention relates to an anchor drilling and setting device for setting flexible anchors, in particular cable bolts, including a drill motor, a bearing for the drill motor, which is engaged by an advance drive for displacing the bearing along with the drill motor in the drilling direction, and a clamping device for the anchor.
From DE 34 10 100 A1, a bolt setting device for fixing bolts in drill holes by the aid of a binder or cement agent has become known. The bolts used in that case are flexible bolts preferably drawn from a strand or coil and cut to length by the aid of a cutting device. The supply means by which such a flexible bolt can be set comprises draw rolls, wherein three driven draw rolls naturally requiring an appropriate drive are provided in the described case. After having inserted the anchors, the latter are accordingly cut off as soon as an anchor has reached the bottom of a drilled hole. The displacement mechanism itself is rotationally mounted on an anchor drilling and setting device base equipment and is pivoted into the respective operating position by the aid of a separate cylinder.
From U.S. Pat. No. 4,079,592, a device for introducing a cable bolt can be taken, in which the cable bolt is mounted on a drum and can be deflected and inserted by the aid of a further guide tube having driven guide rollers. The insertion device in that case is part of a further apparatus for the introduction of adhesive bolts, wherein the drilled holes are preformed using a separate drilling device.
U.S. Pat. No. 4,728,219 describes an automotive anchor drilling and setting device, in which cable bolts are uncoiled from a cable drum and guided through an insertion means arranged on the frame of the travelling mechanism. Also in that device, driving is effected via friction rolls again requiring a separate drive.
The invention aims to provide an anchor drilling and setting device of the initially defined kind, in which flexible anchors and, in particular, cable bolts can be set without requiring an additional drive and any expensive accessory units. In doing so, constructional changes of the drill motor are to be avoided and flexible anchors are to be introducible into a drill hole merely by advancing, i.e. without rotating.
To solve this object, the anchor drilling and setting device according to the invention is further developed to the effect that the drill motor is configured to be coupleable to the clamping device for the anchor, wherein the clamping device is held in the bearing connected with the drill motor. Due to the fact that, as a drive for setting flexible anchors and, in particular, cable bolts, the drill motor itself and, in particular, the advance drive of the drill motor is chosen while merely arranging a clamping device in a manner coupleable to the drill motor, extremely small-structured additional components will do and separate drives will be obviated, since the drive is directly formed by the advance drive of the drill motor. And by the clamping device being held in the bearing connected with the drill motor, further simplification of the mode of operation is feasible. During a drilling operation, the clamping device, which is fastened to a connecting rod, can be removed from the common bearing and pivoted out of its position so as not to impede the drilling operation. As soon as the drill hole has been completed, the clamping device is put in front of the drill drive and can be moved backwards and forwards in the drilling direction by the advance drive.
Such a bearing, in particular, enables the configuration to be devised in such a manner as to cause automatic clamping at an advance of the drill motor, wherein the configuration is preferably devised such that the clamping device comprises a stirrup or hook for encompassing the anchor, and the clamping device preferably comprises at least one clamping jaw, said stirrup or hook and/or clamping jaw(s) being mounted so as to be movable transversely to the direction of insertion. This transverse mobility of the stirrup or hook and clamping jaw, respectively, relative to each other enables the clamping of the flexible anchor or cable in the direction of insertion upon actuation of the drill motor, wherein such clamping will be effected automatically if the configuration is devised in a manner that the bearing includes oblong holes which are inclined at acute angles relative to the direction of insertion such that the clamping force of the clamping device will be increased at a displacement of the clamp in the direction of insertion of the anchor, as in correspondence with a preferred further development. Due to the inclined guideways, the cable bolts will cause a relative displacement of the cooperating components, i.e. stirrup or hook and clamping jaws, respectively, at a movement in the direction of insertion so as to cause automatic clamping during the insertion of the cable bolt.
In a particularly simple manner, the configuration is devised such that the stirrup or hook and/or clamping jaw, respectively, comprise a friction-increasing surface or profiling.
In the following, the invention will be explained in more detail by way of an exemplary embodiment schematically illustrated in the drawing. Therein,
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During the introduction of the cable bolt, the drill-hole-side clamping device 3 again is at first opened, whereupon the cable bolt 8 is introduced opposite to the sense of arrow 4. After this, the clamping device 3 is closed and the clamping device 5 is retracted in the sense of arrow 4 along with the drill motor 2, whereupon a further portion of the flexible anchor can be introduced. To this end, the clamp 3 is again opened and the clamp 5 is brought into clamping contact with the cable bolt 8.
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Number | Date | Country | Kind |
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A 1303 2007 | Aug 2007 | AT | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/AT2008/000295 | 8/21/2008 | WO | 00 | 1/25/2010 |