Metal working – Means to assemble or disassemble – Overedge assembling means
Patent
1994-01-11
1995-12-05
Jones, David
Metal working
Means to assemble or disassemble
Overedge assembling means
29243521, B21J 1534
Patent
active
054717299
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to riveting apparatus. In particular the invention relates to riveting apparatus suitable to be driven via rotatable drive means such as a power drill or the like.
Rivets adapted for use with the apparatus of the present invention comprise a rivet sleeve having a flange at one end and a mandrel insertable through the rivet sleeve. The mandrel has a head at one end diametrically larger than the bore of the sleeve. When the mandrel inserted through the sleeve is pulled and snapped off by the riveting apparatus, with the sleeve inserted through workpieces, the workpieces are joined together by the flange and the other end of the sleeve which is deformed radially outwardly by being pressed by the head.
2. Discussion of the Prior Art
Manually operated riveting tools are known, for example as described in Australian Patent Specification 538902 by Taiyo Seiko Co. Ltd. However, a disadvantage of manually operated tools is that they require considerable physical effort to operate particularly when used repetitively or when tackling big riveting jobs such as roofing, fencing etc. or when using large gauge rivets which require more effort to fix.
OBJECTS AND SUMMARY OF THE INVENTION
An object of the present invention is to alleviate the disadvantages of the prior art. A further object of the present invention is to provide riveting apparatus suitable to be driven by rotatable drive means. For example, the riveting apparatus of the present invention may be adapted to be driven via a cordless electric drill or the like. However, it is to be appreciated that the apparatus of the present invention may be driven via any suitable rotatable drive means. In some embodiments the riveting apparatus may be integrated with the rotatable drive means such as an electric motor which can be mains or battery powered.
According to one aspect of the present invention there is provided riveting apparatus for fixing a rivet having a sleeve and a mandrel insertable through the sleeve, said apparatus being adapted to be driven via rotatable drive means and comprising; said drivable means operates said pressing means in response to said mandrel being pulled.
The drivable means may comprise a mandrel wheel adapted to be driven by the drive shaft. In one form the mandrel wheel may be driven via a worm gear or the like formed on or attached to the drive shaft. The mandrel wheel may include a concave rim or peripheral surface and friction promoting means on its rim surface such as teeth, notches or serrations cut into it for gripping the rivet mandrel. The pressing means may comprise one or more pinch wheels. The or each pinch wheel may include a concave rim and/or friction promoting formations thereon. Alternatively the or each pinch wheel may have a relatively smooth rim surface.
The or each pinch wheel may be rotatably mounted on a lever element. The lever element may be pivotably supported on a pivot axis. Rotation of the lever element about the pivot axis may cause the or each pinch wheel to press the mandrel against the mandrel wheel. The apparatus may include means such as a cam means to rotate the lever element about the pivot axis when the drivable means pulls the rivet mandrel. The apparatus may include a nosepiece having an aperture for receiving the rivet mandrel and a rivet engaging surface for engaging the flange of the nosepiece. The nosepiece may be arranged such that it may move between an extended position and a retracted position. The cam means may be formed on or associated with the rivet nosepiece. The cam means may include a taper formed on the inner end of the nosepiece. As the nosepiece moves between its retracted and extended positions the taper may act upon the lever to cause it to rotate about its pivot axis.
According to a further aspect of the present invention there is provided riveting apparatus for fixing a rivet having a sleeve and a mandrel insertable through the sleeve, said apparatus being adapted to be driven via rotatabl
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patent: 4368631 (1983-01-01), Tanikawa
European patent application number EP116954, partial copy including Claims and Drawings only; Inventor: Totsu, Katsuyuki 29 Aug. 1984.
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