CS265443B1 - Foam plug - Google Patents

Abstract

For anchoring into poorly cohesive, porous materials or inaccessible cavities behind a solid wall, a foaming dowel is designed, which consists of a threaded supporting body, further containers of foaming material components and a starting needle are placed in the axis of the body. In another embodiment, the body is connected to a flexible sleeve secured by a sleeve. This shape is particularly advantageous for anchoring into cavities behind a thin solid wall, where the foamed material in the sleeve creates a spherical shape, which ensures the strength of the dowel against pulling out.

Description

BACKGROUND OF THE INVENTION The present invention relates to a foam anchor, particularly suitable for anchoring objects in a less cohesive manner. porous materials or inaccessible cavities behind the solid wall.

Commonly used dowels have low strength for porous or poorly cohesive materials; Therefore it is necessary to solidify the material in various ways, which is time and material demanding and the result is not always reliable. In the case of anchoring into inaccessible cavities behind a solid thin wall, the dowels are practically impossible to use.

These drawbacks are overcome by the foaming plug according to the invention, which consists of a threaded metal support body, two containers of foaming material components in the axis of the body, and a starter needle. The dowel body can be connected to a flexible sleeve.

The dowel can be used in a pre-drilled hole without a flexible sleeve if the chemical or physical reaction when the foaming material contacts the construction material is not negative or has a positive effect, for example by impregnation, reinforcement or gluing with the construction material. The dowel with a flexible sleeve is used where the sleeve ensures protection of the foaming material against chemical or physical deterioration, and where a complete shape filling of the anchor hole is desirable. Another application is anchoring into inaccessible cavities behind a thin solid wall, where the foaming material in the protective flexible sleeve forms a spherical shape of the solid mass preventing the anchor from being pulled out of the opening.

An exemplary embodiment of a dowel according to the invention is shown in the accompanying drawings, in which Fig. 1 shows a cross-section of a dowel in a pre-drilled hole and in Fig. 2 the foam dowel is placed in a cavity.

The dowel consists of a threaded body JI, containers 2, 2 of the foam components, a starter needle 2 ^{and a} flexible sleeve 5, secured by a sleeve fi ·

The shape of the dowel body 2 depends on the material in which the dowel is placed. The foaming agent containers 2, 2 are made in such a way that the starter needles 2 can be pierced and subsequently mixed by the foaming agent components. The foaming material may be a two component polyurethane and the flexible container 2 s ^e can be made from soft rubber or similar material. When anchoring by means of a foam anchor, a hole is drilled (either in the required length or into the cavity), the anchor with the filling is inserted into it and the reaction is started by means of the starting needle 2. After curing the anchor is able to carry the load.

The dowel according to the invention can be used in the whole field of construction or engineering for anchoring of articles (machines) into materials with lower strength or less cohesion, eventually into inaccessible cavities behind a thin solid wall.

Claims (2)

object of the invention A foaming plug comprising a threaded metal support body, characterized in that it consists of two containers (2, 3) of foaming agent components disposed in the axis of the body (1) and a starter needle (4). Foam plug according to claim 1, characterized in that the body (1) is connected to a flexible sleeve (5) secured by a sleeve (6).