Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1997-01-22
2000-07-18
Jones, David
Metal working
Method of mechanical manufacture
Assembling or joining
72 58, 724668, B21D 2600
Patent
active
060889020
DESCRIPTION:
BRIEF SUMMARY
The invention relates to metal fixing and more particularly to a method of fixing a tubular metal member within an aperture, for example masonry or a transverse aperture through a second tubular metal member, for example, to produce fencing.
It is an object of the invention to provide a simple and inexpensive masonry fixing device and method.
It is a further object of the invention to provide a method of fixing two tubular metal members together without the need for welding, brazing, soldering or the like.
According to one aspect of the invention there is provided a method of fixing a tubular metal member in an aperture which comprises, locating the tubular metal member in the aperture and deforming the metal of the tubular member to expand to extend within the confines of said aperture.
The aperture may be formed in masonry and the tubular member may be formed internally or externally with a screw-threaded portion to receive a bolt or nut, respectively, in use.
Said internally screw-threaded portion may comprise a nut securely located, for example by crimping, at or adjacent the inner end thereof prior to insertion into the aperture.
The outer end of the tubular member may be formed into an external flange prior to insertion in the aperture.
According to a further aspect of the invention there is provided a method of fixing two tubular metal members, one to the other which comprises locating a first tubular metal member through a transverse aperture in a second tubular metal member and deforming the metal of the first member to expand to extend within the longitudinal passage of the second member at the location of the transverse aperture therethrough.
The first member may have a square cross-section and the second member have a rectangular cross-section, the faces of first member located within the transverse aperture through the second member being deformed in bulbous fashion. A plurality of first members may be fixed to span between a pair of second members to provide a fence section.
According to yet a further aspect of the invention there is provided a tool, for performing the method of fixing as defined in the next preceding two paragraphs, comprising a longitudinally extending member locatable in the first tubular member to extend to said transverse aperture through the second member, an actuator rod slidably located in the longitudinally extending member with an actuator member located at the inner end thereof and attached to actuator means at the outer end thereof and a section of plastically deformable material located around the actuator rod between the inner end of the longitudinally extending member and the actuator member whereby when the actuator rod is drawn towards the actuator means, in use, the actuator member causes deformation of the plastically deformable material to cause deformation of the first tubular member.
Preferably the actuator means comprise an hydraulically actuable ram. Alternatively the outer end of the actuator rod may be screw-threaded to receive an actuator nut, rotation of which would retract the actuator rod in the longitudinally extending member.
The plastically deformable material may comprise a synthetic plastics material such as polyurethane.
The longitudinally extending member may have an adjustable end stop member slidably located exteriorly thereof and locable in desired locations for determining the length of penetration of the longitudinal member within said first tubular member, in use.
According to a still further aspect of the invention there is provided a masonry fixing device for location and fixing in masonry, comprising a tubular metal member with a nut rigidly located interiorly at or adjacent one end thereof.
The nut may be located by a crimped portion of the tubular member adjacent said one end and the other end may be formed with an external flange at the other end thereof.
The foregoing and further features of the invention may be more readily understood from the following description of some preferred embodiments thereof, by way of example, wit
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