Device for removing stuck impact drills and the like from drill holes

Abstract

Device for removing jammed impact drills (6) and the like from drill holes, characterized in that a displaceable impact weight (4) is arranged on a solid rod (3) and that a stop (5) is arranged at one end of the solid rod (3) and a receptacle (2) for an impact drill shaft is arranged at the other end.

Description

[0001] The invention relates to a device for removing jammed impact drills and the like from boreholes.

[0002] When drilling holes in concrete, especially in solid concrete, hammer drill bits often jam and cannot be unscrewed safely. The only solution, according to the current state of the art, is to pull on the hammer drill or reverse the drill bit with a pipe wrench after separating the hammer drill from the hammer drill bit. After this, the hammer drill bits are usually unusable. The hammer drill's holder for the hammer drill bits also becomes damaged and eventually unusable.

[0003] The object of the invention is to provide a device for removing jammed percussion drills and the like from boreholes, which removes the percussion drill intact from the borehole.

[0004] According to the invention, this object is achieved by a device for removing jammed percussion drills and the like from drill holes, in which a movable impact weight is arranged on a solid rod, in particular on a solid bar, and a stop is arranged at one end of the solid rod and a receptacle for a percussion drill shaft is arranged at the other end. Embodiments of the invention are presented in the subclaims.

[0005] The advantage of the invention is that the jammed impact drill bits can be removed from the borehole intact and reusable.

[0006] The invention is explained in more detail below using an exemplary embodiment. The accompanying drawings show Fig. 1: the device according to the invention and Fig. 2: the device according to the invention with clamped percussion drill end.

[0007] Corresponding parts are provided with the same reference numerals in all figures.

[0008] In Fig. 1 shows a device for removing jammed percussion drills 6 and the like from drill holes. A movable, in particular cylindrical, impact weight 4 is arranged on a solid rod 3. At one end of the solid rod 3 there is a stop 5, and at the other end there is a receptacle 2, in particular for a percussion drill shaft. In the example shown, the stop 5 is a nut screwed onto the solid rod 3. The receptacle 2 is cylindrical and contains a transverse bore, more precisely two opposite bores, which are in particular partial bores of the transverse bore. The transverse bore, in particular the two opposite bores, has / have internal threads, in particular for two drivers 1. A driver 1, in the exemplary embodiment a screw, is screwed into each of these threads.In the exemplary embodiment, the holder 2 is partially screwed, in particular one-third or approximately one-third, onto the solid rod 3, the remaining inner diameter, ie inner diameter, of the holder 2, in particular up to the solid rod 3, is larger, in particular insignificantly larger, than the impact drill shaft, more precisely than the outer diameter of the impact drill shaft, of a impact drill 6, in particular of the fixed impact drill 6. The impact drill 6 can have an SDS-Max shaft or an SDS-Plus shaft.

[0009] In Fig. Figure 2 shows this device for removing jammed impact drill bits 6 with a clamped impact drill shaft. The two drivers 1 engage in two notches or guide grooves in the impact drill shaft and secure the impact drill bit 6 in the holder 2.

[0010] A hole is to be drilled into a concrete wall, particularly a concrete wall with reinforcing bars, using a hammer drill. During this process, the hammer drill bit 6 often jams. The hammer drill is then removed from the hammer drill bit 6, and the device according to the invention is attached to the hammer drill shaft. By repeatedly striking the movable impact weight 4 against the stop 5, the hammer drill bit 6 is released and can be reused. List of reference symbols 1 driver 2 recording 3 solid bars 4 Impact weight 5 stop 6 hammer drills

Claims

[1] Device for removing jammed impact drills (6) and the like from drill holes, characterized by that a movable impact weight (4) is arranged on a solid rod (3) and that a stop (5) is arranged at one end of the solid rod (3) and a holder (2) for a percussion drill shaft is arranged at the other end. [2] Device according to claim 1, characterized by that the holder (2) is cylindrical and is screwed onto the solid rod (3) by approximately one third, that the inner diameter of the holder (2) up to the solid rod (3) is insignificantly larger than the hammer drill shaft of a hammer drill (6) and that the holder (2) has a transverse bore for two drivers (1). [3] Device according to claim 1 or 2, characterized by that the striking weight (4) is cylindrical. [4] Device according to claim 1, 2 or 3, characterized by that the stop (5) is a nut screwed onto the solid rod (3). [5] Device according to one of claims 2 to 4, characterized by that the two partial bores of the transverse bore in the holder (2) each have an internal thread into which a driver (1) can be screwed from the outside.

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