RU2227230C2 - Thrust butt dowel - Google Patents

Abstract

FIELD: building and construction. SUBSTANCE: device has releasing bushing, threaded rod, passing through said bushing, on front end of which rod thrust cone is made for retraction into releasing bushing, washer and nut, which nut is screwed onto threaded rod. Releasing bushing is combined of two or three equal parts, which are glued to one another. EFFECT: easy assemblage, simple construction, no costly equipment is required. 3 cl, 2 dwg

Description

The invention relates to construction and installation works and can be used when fixing various objects to concrete and brick walls, to ceilings.

A device for fixing objects on a concrete or stone part with a hole is known. The device comprises a rod with a thread at one end, and at the other end, the rod is made integrally with a spacer cone having longitudinally spaced equally spaced apart ribs. The device also includes a spacer sleeve mounted on the rod with longitudinal slots on the side facing the spacer cone, and a nut screwed onto the rod. The ribs of the rod are associated with the slots of the spacer sleeve and protrude both above its outer surface and above the large base of the spacer cone that is close to it in diameter (see RF patent No. 2104414, class F 16 B 13/06).

The disadvantage of this design is the need to clog the device into an exact diameter hole using a percussion instrument.

Closest to the proposed solution is an expansion dowel for fixing in a building part, containing an expansion sleeve having several slots extending from its front entrance end and extending along part of its length, forming expandable legs, as well as a crimping zone adjacent to the slots and formed by recesses, and a threaded pin passing through the sleeve, on the front end of which there is a spacer cone for retracting into the slotted part of the expanding sleeve, while the longitudinal slots extend to the recesses, l hedgehogs closest to the front end of the expansion sleeve. To form a crimp zone, the expandable sleeve has crescent-shaped recesses located in circumferential and axial directions at a distance from each other. The ends of the recesses are axially facing each other and overlapping in the shape of a meander with each other in the circumferential direction to form flexible jumpers (see RF patent No. 2110703, CL F 16 13/06).

The disadvantage of this dowel is the complexity of the design of the expansion sleeve and the high complexity of its manufacture.

The basis of the invention is the task of creating a spacer expansion bolt shield convenient for installation and simple in design of an expansion sleeve, for the manufacture of which expensive equipment is not required.

The problem is solved in that the expansion bolt shield for fixing in a building part, containing an expansion sleeve, a threaded rod passing through the expansion sleeve, at the front end of which there is a expansion cone for retraction into the expansion sleeve, a washer and a nut screwed onto the threaded rod, and the expansion screw itself the sleeve is made integral and consists of two equal parts that are glued together or a thin plastic film is screwed onto the external surface of the sleeve, or is located on the external surface of the sleeve one or more thin PVC rings.

The invention is illustrated by drawings.

Figure 1 shows the expansion dowel for fixing in a building part, containing an expansion sleeve 1, a threaded rod 2 passing through the sleeve 1, at the front end of which there is a expansion cone for drawing into the expansion sleeve 1, the washer 3, abutting against the end face of the spacer sleeve 1 and nut 4 screwed onto the rod 2. The expansion sleeve 1 consists of two or three equal parts, which are either glued together or a thin plastic film is screwed onto the sleeve’s outer surface, or one is located on the outer surface of the sleeve or more thin PVC rings.

Figure 2 shows the expansion dowel, mounted in a building part. To fix the expansion bolt shield, it is inserted into the hole 5 drilled in the building part 6, so that the nut with its washer 3 abuts the outer surface of the building part 6. By tightening the cone into the expansion sleeve 1 glue (thin plastic film or thin polyvinyl chloride ring ) it breaks and the components of the sleeve are unclenched, on the one hand, radially outward and at the same time, in the presence of leaks between the construction part and the washer 3, the expandable sleeve is pulled together.

Claims (3)

1. An expansion bolt shield for fixing in a building part, comprising an expansion sleeve, a threaded rod passing through the sleeve, at the front end of which there is a expansion cone for retraction into the expansion sleeve, a washer and a nut screwed onto the threaded rod, characterized in that the expansion sleeve is made integral of two or three equal parts that are glued together. 2. An expansion dowel according to claim 1, characterized in that a thin plastic film is screwed onto the outer surface of the sleeve. 3. An expansion dowel according to claim 1, characterized in that on the outer surface of the sleeve one or more thin polyvinyl chloride rings are located.

Images