Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path
Patent
1982-06-16
1984-12-18
Crane, Daniel C.
Metal deforming
By relatively movable offset tool-faces
With tool motion in fixed path
72450, 72482, 72409, 81363, 81126, B21D 3100
Patent
active
044884257
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a bending tool which is especially adapted for the bending of elongate members such as fence cross members.
Hitherto the bending of relatively rigid members such as cross members of fences (e.g. wires) has been difficult to achieve on a systematic and orderly basis. While previous methods have been attempted they have mainly utilized the aid of bending machines such as those used for bending rigid lengths of pipe which are utilized as reinforcement members in the formation of concrete structures. Such bending machines however are bulky, expensive and entirely inappropriate for forming curved structures such as curved fences or frameworks on a manual basis.
It is therefore an object of the invention to provide a bending tool which may be utilized to quickly and efficiently form curved structures.
The bending tool of the invention includes:
support means;
bending means; and,
actuating means for actuation of the bending means which is movable relative to the support means or vice versa.
The support means may include a housing or supporting frame or plate for the bending means but most desirably includes a rigid frame including a pair of spaced parallel side members and optionally one or intermediate cross members. There also is suitably included an end cross member or intermediate cross member which functions as an abutment block and may include a recess which may accommodate portion of the bending means in use and wherein the elongate member being bent is sandwiched therebetween.
The bending means may include a pusher member which may be actuated so that it may bear against the elongate member to bend same. Suitably the pusher member may include a pushrod or pusher block which is movable relative to the above mentioned support frame. The pusher block is suitably slidably mounted on the rigid support frame. Thus the pusher member may be mounted on slideways or slide grooves on the rigid frame. However, this is not necessary and the pusher member may be suitably spaced from the rigid support frame and movable thereto between the pair of spaced side frame members.
In another arrangement the pusher block may remain stationary and the support frame moved relative thereto upon actuation of the actuating means to bend the elongate member.
The actuating means in one form may include a pair of elongate handles which are similar to bolt cutter handles which may be widely spaced apart when the handles are in their open position.
Each opposed handle is suitably of substantial length and is similar to a bolt cutter handle as described above so as to provide a considerable amount of thrust in actuation of the bending means.
At its end which is proximal to the bending means each handle may include a toggle plate or other suitable connecting member which is pivotally attached to the handle or forward extension thereof and also to an associated portion of a respective side member of the rigid frame.
Reference is now made to a preferred embodiment of the invention as shown in the accompanying drawings wherein:
FIG. 1 is a top plan view of the bending tool in the closed position;
FIG. 2 is a top plan view of the bending tool shown in FIG. 1 in the open position;
FIG. 3 is a perspective view of the bending tool shown in FIG. 1;
FIG. 4 is a top plan view of an alternative type of bending tool to that shown in FIG. 1 and being illustrated in the closed position;
FIG. 5 is a top plan view of the bending tool of FIG. 4 in the open position; and,
FIG. 6 is a perspective view of the bending tool of FIG. 4.
In the drawings, the bending tool shown includes opposed handles 10, adjustable stops 11, toggle connectors 12 interconnecting each handle 10 to rigid frame 13 comprising opposed parallel side members 14. Frame 15 also includes an abutment block or intermediate cross member 17. There is also shown pusher member 15 having a tapered end surface 16 as shown and being pivotally attached to the inner end portions of each handle 10 at 24. Toggles 12 are pivotally attached to a respective side frame member 14 at
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patent: 3034385 (1962-05-01), Hester
patent: 3456467 (1969-07-01), Hogarth
patent: 3822578 (1973-01-01), Le Breton
patent: 4077249 (1976-01-01), Schmitter
Crane Daniel C.
Jones David B.
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