| 摘要 |
<p>A portable pneumatic rebar bending device (11) has a base portion (13), a pivoting portion (15), and a pneumatic cylinder (17) connecting and operable to pivot the pivoting portion (15) with respect to the base portion (13). The axis of pivot includes a radiused wheel (43) having a shallow 'V' shaped slot about which the radius of curvature or the rebar (125) is formed. The radiused wheel (43) can be, where necessary, removed from the pivoting members (13, 15) where the required bend is so extreme that the device (11) would otherwise be trapped. A pair of handles (53, 55) facilitates manual positioning and carriage. A weak spring (not shown) acts to reset the pivoting member (15) with respect to the base member (13) once the pneumatically operated cylinder (17) is de-pressured. The weak spring prevents injury on closure. An adjustment is provided to enable a variety of sizes of rebar to be used with the device (11) of the present invention.</p> |
