Apparatus for applying fixing elements, with plunger, plunger return catch and pivoting plug guide
AssigneeSociete De Prospection Et D'Inventions Techniques Spit
InventorsRoland Almeras, Patrick Herelier
Life of this patent
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Abstract
The apparatus comprises a barrel (1), a plunger (4) movable in the barrel for driving a fixing element (6), a plunger return catch (9), an element guide (21) mounted pivotably at the front of the barrel in order to load an element (6) therein from the rear to the front. The guide (21) is movable in axial translation relative to the barrel (1) and can move back into the firing position towards the barrel (1) and cover the front end of the recess (13) of the plunger (4), in order to then cover the head (14) of a fixing element (6) previously introduced into the guide (21). The apparatus of the invention is well adapted to the application of plugs in steel or concrete materials.
Claims16
Apparatus for inserting a fastening element into a substrate, comprising:
- a barrel (1);
- a propellant charge (5) disposed rearwardly of said barrel (1);
- a plunger (4) movable within said barrel (1) under the action of combustion gases of said propellant charge (5) for driving a fastening element (6) into a substrate (7), said plunger (4) having a recess (13) defined within a front end portion thereof for receiving a head portion (14) of said fastening element (6);
- a rocker (20) pivotably mounted upon said barrel (1), about a shaft (31) disposed orthogonally to a longitudinal axis (32) of said barrel (1), between a first open position at which said rocker (20) has an axis thereof inclined with respect to said axis (32) of said barrel (1) for receivably loading a fastening element (6) into said apparatus, and a second closed position at which said rocker 20 and said fastening element (6) loaded within said apparatus are coaxially disposed with respect to said axis (32) of said barrel (1);
- and
- an element guide (21) disposed within said rocker (20) so as to be pivotably movable therewith, between said first and second positions, and also being movable in axial translation relative to said rocker (20) and said barrel (1) as a result of a first end portion of said element guide (21) being pressed against said substrate, said element guide being axially movable between said second closed position at which said fastening element (6) is loaded within a second end portion of said element guide (21) and a third firing position at which said head portion (14) of said fastening element (6) is disposed within said recess (13) of said plunger (4) and said second end portion of said element guide (21) surroundingly envelops said front end portion of said plunger (4) within which said recess (13) is defined and within which said head portion (14) of said fastening element (6) is disposed, so as to accurately guide said plunger (4), and said fastening element (6) disposed within said recess (13) thereof, during said third firing position.
Dependencies are inferred from the claim text.