CS212414B1 - Facility for making the grooves in the building walls,e.g.for assembling the electric installation conductors - Google Patents

Description

The invention relates to a device for producing grooves in the walls of buildings for the installation of electrical installation conductors.

Up to now, the grooves in the walls of the buildings for the subsequent installation of the electrical installation wires or pipes have been made either manually by cutting or scraping or by wall grooving. These machines are most often equipped with disc tools, such as milling cutters for the actual grooving. For electrical installation purposes, grooves in masonry or plaster are made flat for subsequent placement of conductors flat.

However, it has not been possible with known devices to make a sloping groove, a groove that forms an acute angle with the wall plane. In addition, disc tools can catch on reinforcing steel wires and cause injury to the operator.

These disadvantages of the previously known grooving devices are eliminated by the device according to the invention, which is based on the fact that the face of the adjustable head with the central hole for the cutting tool is adapted to form an acute angle with the plane of the wall of the building.

An exemplary device according to the invention is shown in the drawings, in which Figs. 1 and 2 show an adjustable head with a support cylinder, Fig. 3 is a clamping sleeve, Fig. 4 is an illustrative view of the device in working position in the wall; 5, the bridge conductor is accommodated in the groove, and in FIG.

The device according to the invention is designed as a support cylinder 2 fastened by a clamping sleeve 7 or other fastening member on the body of an electric drill (not shown in the drawing).

This support sleeve 2 carries an adjustable head 4 displaceably mounted thereon and lockable in a certain position of adjustment. The feed is guided by a groove with an adjusting screw g. The adjustable head 4 has a central hole for the cutting tool ^at its head and further holes for waste of material from the wall at the periphery.

Hereinafter, the device according to the invention in its function will be described. The electric hand tool, eg a drilling machine, is provided with an adjustable head 4, ^from whose central opening a cutting tool is led, which is, for example, a milling cutter with carbide inserts.

The adjusting head 4 is adjusted by means of the adjusting screw g so that the length of the cutting tool corresponds to the depth of the groove in the wall for mounting the electrical conductor. The entire adjustable head is arranged obliquely so that by applying to the plane of the wall in which the groove is to be produced, the tool is simultaneously set at the required acute angle, preferably in the range of 30 to 80 °. The angle selection depends on the electrical conductor or pipe used, depending on the required self-locking value.

An electrical conductor or pipe is then inserted into the inclined groove and, due to the inclination and ripple, is frictionally fixed in the groove by its external sides. There is no provisional attachment of nails, gypsum or otherwise.

Claims (2)

SUBJECT OF THE INVENTION Device for producing grooves in the walls of buildings, for example for the installation of electrical installation wires with a cutting tool, characterized in that it comprises an adjustable head (4) whose face with a central cutting tool hole is adapted to clamp wall sharp angle. Device according to Claim 1, characterized in that it has a guide groove for the set screw (3).