Abstract: A holder in particular for fastening a lining, for at least partially casting into a concrete element which is cast using a formwork, wherein the holder is aligned by an outer surface with the surface of the concrete element pointing towards the formwork, in particular for use in tunnel-building and engineering construction. The holder for casting into a concrete element is made available which can be handled simply for preparation purposes and during the concreting operation and using which a lining can be fastened simply to the concrete element. This is achieved in that a fastening device for releasably fastening the holder to the formwork is provided, wherein the fastening device has a holding part interacting with the formwork and a clamping element arranged on the outer surface of the holder, wherein the clamping element interacts with the holding part.

Abstract: A holder in particular for fastening a lining, for at least partially casting into a concrete element which is cast using a formwork, wherein the holder is aligned by an outer surface with the surface of the concrete element pointing towards the formwork, in particular for use in tunnel-building and engineering construction. The holder for casting into a concrete element is made available which can be handled simply for preparation purposes and during the concreting operation and using which a lining can be fastened simply to the concrete element. This is achieved in that a fastening device for releasably fastening the holder to the formwork is provided, wherein the fastening device has a holding part interacting with the formwork and a clamping element arranged on the outer surface of the holder, wherein the clamping element interacts with the holding part.

Abstract: A workpiece clamp is disclosed for pressing first and second workpieces into engagement by a chucking tool (6) and a counter-holding device (7) supported by a frame (5). A pair of clamping jaws (11,12) with spiral shaped clamping surfaces (13,14) are pivotally mounted on the clamping jaw support (8) of U-shape having two spaced apart support members. First and second pivot pins (21,22) are mounted opposite and parallel to each other on the support members. The clamping jaws squeeze and hold one workpiece therebetween when the chucking tool (6) is moved against the other workpiece to force the workpieces into engagement. The spaced apart support members provide a clearance space to allow one of the workpieces to be inserted between the jaws at any angle for engagement with the other workpiece.