Boring or penetrating the earth – With magazine for successively moving unconnected – oriented...
Reexamination Certificate
1999-06-23
2001-05-01
Pezzuto, Robert E. (Department: 3671)
Boring or penetrating the earth
With magazine for successively moving unconnected, oriented...
C173S164000
Reexamination Certificate
active
06223837
ABSTRACT:
This application claims priority to German Utility Model Application No. 298 11405.4, filed Jun. 25, 1998, which is incorporated herein by reference.
FIELD OF THE INVENTION
The invention relates to a drilling implement for drilling holes in the ground, having a mounting, a drill drive, which is arranged displaceably on the mounting, for drilling tools, such as drill tubes or drill rods, a linear magazine, which is arranged on the mounting, in which the drilling tools can be stored in a magazine in a plane parallel to the mounting and which can be displaced in this plane by means of a drive device, and a clamping device for the selective rotational fixing of the fitted drill string and a drill tube which can be connected thereto and is arranged in the drilling axis.
BACKGROUND OF THE INVENTION
Hitherto, drill rods have been stored and handled by means of various magazines and magazine forms. For example, document DE 40 30 525 C2, which portrays the generic device, has disclosed a rod magazine for a rock drill machine, which magazine has two receiving devices which are spaced apart, are arranged on a mounting which supports a drill drive and each have a guide fork for accommodating drill stems in a parallel plane to the mounting. By means of hydraulic cylinders, the receiving devices can be displaced toward the drilling axis until the drill stem which is to be removed from the receiving device bears against a guide surface and is released from the receiving device. Then, it is screwed to the drill string. These movements are controlled with the aid of contactless switches with electronic switching elements which interact with switching lugs. Such a complex arrangement of sensors does not rule out the possibility of incorrect functional sequences, owing to the sensitivity of the switching elements to the severe operating conditions involved in the use of a drilling implement.
DE 297 03 271 U1 has disclosed a drilling implement with a rotable drum magazine for drill tubes which is arranged on a mounting, in which implement a handling device is provided for removing the drill tubes from the drum magazine; this handling device has a telescopic gripper arm with a gripper. However, a considerable outlay on control engineering is required for the fully mechanized actuation of the handling device.
SUMMARY OF THE INVENTION
Therefore, the invention is based on the object of improving a drilling implement of the type described above in such a manner that the rod can be inserted from a rod magazine into the drill string or the rod can be removed from the drill string and stored in the rod magazine, without the need to use the sensor devices which have hitherto been customary and are susceptible to faults in order to control the sequence.
According to the invention, the object is achieved by the fact that, in the drilling implement outlined above, stops are provided as mechanical travel-limiting means when the drill tubes are being positioned in respective functional positions.
Positioning the drill tubes against mechanical travel-limiting means obviates the need for a control device with a high risk of the sensors failing. Nevertheless, an operator of such a drilling implement can carry out the magazining and transfer operations without difficulty and without significantly increasing the nonproductive times when drilling.
Advantageous configurations of the invention are given in the subclaims.
Expediently, the stops are provided in the drive device for the linear magazine and fix magazining and transfer positions for the drill tubes. The stops are, for example, the limit positions of movement paths of piston-cylinder units of the drive device, so that the linear magazine is ineluctably arranged in the desired positions.
Furthermore, it is advantageous if a stop is formed, as a rod support, on a stationary rod chuck of the clamping device. As a result, a limit position is defined directly by a drill tube which is arranged in a longitudinal axis of the drilling string or in the drilling axis and is then screwed to the drill string.
If different receiving contours can be set on the rod support, in order to match different diameters of drill tubes, the drilling implement can be employed universally by changing these contours.
This change in the contours can be carried out by means of an adjustment device for movable contours. As an alternative, rod supports with different receiving contours may be fitted to the rod chuck as desired.
In an advantageous embodiment, the linear magazine has two spaced-apart receiving devices for the drill tubes.
Tube holders for clamping a drill tube in a transfer position in the linear magazine may be arranged on the receiving devices. By means of the tube holders, the front drill tube may in each case be clamped onto the receiving device and can be conveyed into the transfer position in the drilling axis, where it can be screwed to the drill string.
According to an advantageous refinement of the invention, the linear magazine contains a preloading device which presses the drill tubes which are stored in the magazine toward the drill tube which is clamped in the tube holders. This simplifies the functional sequence involved in removing a drill tube from the liner magazine.
If the linear magazine can be displaced with respect to the mounting by way of its receiving devices and, by means of respective limit stops on the movement paths of the drive devices, can be positioned in different, in particular three, functional positions, an operator can move the magazine into these positions in a simple manner.
Expediently, the receiving devices contain holding forks, which receive and guide the stored drill tubes in a holding fork opening.
The universal usability of the drilling implement is further enhanced by the fact that adapter elements can be fixed to the holding forks in order to adapt to different drill-tube diameters.
The fact that the translational movement of the receiving devices and/or of the holding forks is synchronized by hydraulic or mechanical synchronization of the two drive devices means that the drill tubes are always moved exactly into the drilling axis, without the operator having to act specifically to ensure this.
For simple adaptation to different drill-tube diameters, it is also possible to fit spacer rings to the drive devices.
If, according to a further configuration of the drilling implement according to the invention, it is possible to adjust the positioning of a means for attaching the drive device to a support of the mounting, it is possible, in a simple manner, to adapt the linear magazine to different transmissions with different distances between the drilling axis and the mounting.
REFERENCES:
patent: Re. 30071 (1979-08-01), Hilding et al.
patent: 3986569 (1976-10-01), Hilding et al.
patent: 4084300 (1978-04-01), Narushima et al.
patent: 4501524 (1985-02-01), Yoan et al.
patent: 4632618 (1986-12-01), Issakainen
patent: 4834195 (1989-05-01), Robinson
patent: 5954209 (1999-09-01), Wurn et al.
Bauer Spezialtiefbau GmbH
Pepper Hamilton LLP
Pezzuto Robert E.
Stanley Elizabeth
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