摘要:
The drilling device for memory, particularly aerated concrete, includes an impact drilling machine and an impact rotation tool to be clamped in the drilling machine. To prevent the impact-drilling shank jamming in the drill hole as it is withdrawn, and nevertheless to achieve maximum holding power in the masonry, the impact-rotation tool consists of an impact-drilling shank tapered conically toward a tip from a cylindrical middle portion of increased diameter, a carrier bush connected with a circumferential shoulder of the impact-drilling shank and a ram engaging with some play in an internal bore of the carrier bush. A drill bit-like locating means is provided on the ram for engagement in the drilling machine.
摘要:
A threaded bolt assembly adapted to be anchored in a drilled hole formed in a concrete part and having an undercut expanding towards a bottom of the drill hole, with a hardening compound mass. The threaded bolt assembly includes a threaded bolt having an internal bore extending from a leading end face of said threaded bolt and having an internal thread, and a plurality of expansible segments formed in a region of the internal bore by a plurality of longitudinally extending slots. The threaded bolt assembly further includes an expander bolt having a threaded portion threadably received within the internal bore of the threaded bolt, an expander cone extending from the threaded portion. A projection extends from an end face of the expander cone.A method for anchoring such a threaded bolt assembly in a hole with an undercut drilled in a concrete part, is also described.
摘要:
A device for forming an undercut in a drilled hole comprises a stem having a pivotal reaming element at a lower end thereof, and a guide tube in which the stem is longitudinally displaceable with the reaming element pivoting radially outwards from the guide tube in a lower end position of the stem.
摘要:
An anchoring plug comprises a plug shaft having a leading end and a trailing end as considered in direction of driving into a supporting structure, a mounting member provided on the trailing end of the plug shaft for mounting an object, an expansible sleeve, and a expander cone which is to be pulled into the expansible sleeve, the expander cone being provided with an abutment, and a sliding sleeve which is located before the expander cone as considered in the driving direction and abutting against the abutment so that the sliding sleeve is deformable by the expansible sleeve, and the expansible sleeve is displaceable onto the expander cone over the sliding sleeve.
摘要:
An expansible plug made of a plastic material located in a drilled hole in masonry for receiving a fastening screw and comprising expansible legs having at the expansible end thereof outer notches of a reduced depth.
摘要:
The composite plug for mounting objects in holes drilled in masonry and the like comprises a plug body having a screw passage for receiving a mounting screw and an expanding region expandable by insertion of the mounting screw, the plug body being provided with outlet openings for mortar introduced into the plug body, channels forming guiding surfaces in the screw passage, the guiding surfaces leading to the outlet openings and subdividing the screw passage into a front region and a rear region, and grooves forming longitudinal channels extending along an outside of the plug body, the outlet openings merging into the logitudinal channels. The outlet openings are located in the front region and the screw passage has a portion with an increased diameter. A stopper which is insertable in the portion of the screw passage of increased diameter is provided and formed as a hollow member. The stopper has openings which are in a alignment with the outlet openings.