Sliding anchor

Abstract

A chemical sliding anchor, in particular for use in mining, for the firm bonding to the rock in a borehole using a fixing agent, comprises an anchor pipe, preferably an anchor nut, anchor plate preferably supported by the anchor nut, for lying on the rock, involving little technical effort by effectively using a sliding function of the sliding anchor in the case of a large change in length of the sliding anchor on absorbing dynamic loads. An elastic element, in particular a spring, is integrated in the sliding anchor and an increase in length of the sliding anchor is effected for a given sliding function with a spring deflection of the elastic element.

1 . Chemical sliding anchor especially for use in mining for a firmly bonded fixing to rock in a borehole with fixation equipment, comprising
 an anchor pipe;   an anchor nut;   an anchor plate supported by the anchor nut for positioning on the rock,   wherein an elastic element is integrated in the sliding anchor whereby an increase in the length of the sliding anchor is achieved by a sliding movement on deflection of the elastic element.   
     
     
         2 . The sliding anchor according to  claim 1 , wherein said elastic element is a spring, 
     
     
         3 . The sliding anchor according to  claim 1 , wherein the sliding anchor has a sleeve and the elastic element is arranged inside the sleeve. 
     
     
         4 . The sliding anchor according to  claim 1 , wherein the sliding anchor has a change in length of the elastic element is aligned in the direction of a longitudinal axis of the anchor pipe. 
     
     
         5 . The sliding anchor according to  claim 1 , wherein the sliding anchor is provided with a damping element for absorbing dynamic forces. 
     
     
         6 . The sliding anchor according to  claim 1 , wherein the elastic element is an additional component in addition to the anchor pipe. 
     
     
         7 . The sliding anchor according to  claim 2 , wherein the anchor pipe is arranged within the sleeve, and the elastic element is arranged between the anchor pipe and the sleeve. 
     
     
         8 . The sliding anchor according to  claim 3  wherein the elastic element at one end lies on the sleeve bearing element connected to the sleeve while at the other end it lies on the anchor pipe support element connected to the anchor pipe. 
     
     
         9 . The sliding anchor according to  claim 3  wherein the sleeve is closed in the area of the anchor pipe support element by a closure cap. 
     
     
         10 . The sliding anchor according to  claim 4 . wherein the sleeve bearing element is designed as a plate with an opening and the anchor pipe is arranged in the opening of the plate. 
     
     
         11 . The sliding anchor according to  claim 10 , wherein the anchor pipe bearing element is in the form of a support ring. 
     
     
         12 . The sliding anchor according to one or more  claim 10 , wherein the anchor pipe bearing element is enclosed, in particular completely, inside a preferably cylindrical sleeve space in the sleeve. 
     
     
         13 . The sliding anchor according to  claim 3 , wherein the sleeve is arranged in the area of a rear end of the anchor pipe in order to position the sleeve within a borehole in the rock while the anchor nut is directly or indirectly attached to the anchor pipe and preferably the sleeve forms the material connection between the fixing agent and the rock of a borehole. 
     
     
         14 . The sliding anchor according to  claim 3 , wherein the sleeve is arranged in the area of the front end the anchor pipe to position the sleeve outside the borehole in the rock while the anchor plate lies directly or indirectly on the sleeve or the sleeve support member, whereby the anchor plate lies against the rock on a rock side and lies on a sleeve side of the sleeve or sleeve bearing element while the rock side is formed opposite the sleeve side on the anchor plate. 
     
     
         15 . The sliding anchor according to  claim 3 , wherein the sleeve is arranged in the area of the front end of the anchor pipe to position the sleeve inside the borehole in the rock and the sleeve is connected to the anchor plate and/or the anchor nut. 
     
     
         16 . The sliding anchor according to  claim 1 , wherein the anchor pipe is at least partially made of metal such as steel or, preferably fiber-reinforced plastic. 
     
     
         17 . The sliding anchor according to  claim 1 , wherein the elastic element is in the form of a coil spring, a volute spring, an annular spring, a folding plate or an elastic plastic, such as rubber spring.