Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1982-12-15
1986-02-18
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29235, B23P 1102, B23P 1902
Patent
active
045703230
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method and tool for inserting an elastic body in a cavity, the dimensions of the body being substantially greater than those of the cavity. An area in which there is a need of the inventive subject is in relation to fire sealing leads-through in walls and floors for elastic cables, pipes, ventilation ducts etc. (hereinafter called conduits) going from one room to another.
BACKGROUND
Fire-sealing leads-through are commercially available in the form of prefabricated bodies with tubular shells having elastic, fire-resistant, foamed material accommodated therein, and compressed transversely of the longitudinal axis of the shell. These prefabricated bodies are intended for casting into walls and floors or prefabricated building components constituting such walls or floors. This means that it must be clear during the planning of a building which conduits are to be laid and how they are to be laid. When extending or rebuilding buildings as well as when increasing or altering the laying of conduits, the advantages provided by these prefabricated members cannot be utilized. It is then a question of attempting to seal the new holes which are made in walls and floors, using loose pieces of foamed material which are tamped in between the conduits in the holes. Alternatively, the seals can be molded in situ, but this is a complicated and time-consuming operation, if a satisfactory result is to be achieved.
SUMMARY OF THE INVENTION
The present invention has the object of enabling the use of fire-resistant foamed material in prefabricated bodies for holes in walls and floors which have been made after erection. The prefabricated bodies used in this conjunction have no shell, thus none of the precompression of the foamed material produced by the shell. This compression of the foamed material, which is a prerequisite for the fire seal to function in the intended mode, is provided in accordance with the invention by the method in which the prefabricated bodies are placed in the holes.
The invention will now be described with reference to the appended drawings, which illustrate different stages of inserting an overdimensioned elastic body in a cavity while using a preferred embodiment of a tool intended for this purpose.
DESCRIPTION OF THE FIGURES OF THE DRAWING
FIG. 1 illustrates a fitting tool with an elastic body placed in it, the tool being inserted in a hole in a part of a building.
FIG. 2 illustrates the same tool and same building part during one phase of the fitting operation, during which the elastic body is about to leave the tool.
FIG. 3 illustrates the same tool and same building part during a later phase of the fitting operation, during which the elastic body has been accommodated in the hole and the tool is on its way out of the hole.
DESCRIPTION OF A PREFERRED EMBODIMENT
FIG. 1 illustrates a fitting tool 1 with an elastic body 6 placed therein, said tool being partially inserted in a through hole 8 in a building part 7. The tool comprises two tubular portions, a first larger portion 9 dimensioned for receiving the elastic body 6, and a second smaller portion 10 dimensioned for insertion into the hole 8 to be fire-sealed. Both tubular portions forming respectively the large and the small end of the tool are united by means of a conically shaped portion 11. The tool further comprises a lid 2 closing off the large end, and engaging a gasket surrounding the large end opening, and a pipe socket 4 provided on the lid for supplying a pressurized fluid, suitably compressed air.
A spacer ring 5 is displaceably arranged on the smaller portion 10 of the tool, the spacer ring being used to preset the depth of insertion into the hole.
FIG. 1 illustrates the initial position for inserting elastic body 6 into the hole. The body 6 is inserted sufficiently far into the larger portion 9 of the tool so that its inner edge is against, and seals against the conically formed portion 11 of the tool. If the pressure in the larger portion 9 is increased by admissio
REFERENCES:
patent: 1733610 (1929-10-01), Leipert
patent: 1830814 (1931-11-01), Thiry
patent: 2696442 (1954-12-01), Allbright
patent: 2696443 (1954-12-01), Allbright
patent: 3139677 (1964-07-01), Goldstein
Legerius Bengt E.
Siebert Hans W.
Moon Charlie T.
Telefonaktiebolaget L M Ericsson
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