Method and apparatus for inserting dowel bars for a concrete...

E - Fixed Constructions – 01 – C

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E01C 11/00 (2006.01) E01C 23/02 (2006.01) E01C 23/04 (2006.01)

Patent

CA 2069516

A method and apparatus for inserting dowel bars into a concrete slab is used in association with a slip forming machine of a type having a frame with a pan attached thereto for shaping uncured concrete into a continuous concrete slab. A plurality of openings are exposed through the pan and are spaced across the pan. Dowel bar retainers are disposed in each respective one of the openings for holding a dowel bar in readiness to be inserted into the concrete slab. A dowel bar inserter is disposed above each of the dowel bar retainers for pushing a dowel bar disposed in a respective one of the dowel bar retainers through a respective one the openings and into the concrete slab. Apparatus is provided for automatically and independently actuating each one of the dowel bar inserters at a predetermined place in a concrete slab whereby respective ones of the dowel bars disposed in respective ones of the dowel bar inserters can be positioned in the concrete in a predetermined pattern across the concrete slab.

Méthode et appareil servant à insérer des goujons dans une dalle de béton et utilisés de pair avec une machine à coffrage glissant constituée d'un châssis auquel est fixé un bac permettant de former du béton non durci en une dalle de béton continue. Le bac est percé d'une série d'ouvertures espacées et orientées de façon transversale. Des dispositifs de retenue de goujons, placés dans chaque ouverture, retiennent les goujons en attendant leur insertion dans la dalle de béton. Un dispositif d'insertion de goujons est placé au-dessus de chaque dispositif de retenue en vue de pousser sur le goujon qui s'y trouve, de sorte que le goujon sort par son ouverture correspondante et s'enfonce dans la dalle. Un appareil actionne automatiquement et indépendamment chaque dispositif d'insertion à un endroit préétabli de la dalle, de sorte que les goujons logés dans leur dispositif d'insertion respectif sont enfoncés transversalement dans le béton selon un intervalle déterminé.

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