摘要:
A mechanism for converting oscillatory rotation of an input shaft (24) to uni-directional rotation of an output shaft (26) has the input shaft (24) journalled to a frame (32) and rotatable about an input axis, over a range of rotational positions, between a forward limit and a reverse limit. An output shaft (26) is journalled to the frame (32) and rotatable about an output axis, which is normal to the input axis. Three bevel gears (60, 62, 64) are employed, namely a first gear (60) coupled to the input shaft (24), a second gear (62) coupled to the input shaft (24) and spaced axially from the first gear (60), and a third gear (64) coupled to the output shaft (26). The bevel teeth (70, 72, 74) of the three gears (60, 62, 64) are arranged in peripheral arrays covering cover less than one half of the entire periphery of each gear (60, 62, 64), so that the bevel teeth (74) of the third gear (64) inter-mesh only with the bevel teeth (70) of the first gear (60) whenever the input shaft rotates from the forward limit toward the reverse limit, and so that the bevel teeth (74) of the third gear (64) inter-mesh only with the bevel teeth (72) of the second gear (62) whenever the input shaft (24) rotates from the reverse limit toward the forward limit.
摘要:
A strapping tool (10) of a type used to apply a steel strap (12) in a tensioned loop around a package (14) and to join the strap via a series of interlocking joints (16) comprising interlockable shoulders punched into overlapped ends of the strap (12) includes a base (60) extending longitudinally and defining a pair of recesses (70, 72). A frame (78) upstanding from the base (68) is mounted integrally to the base (68). In a mechanism for admitting the overlapped ends of the strap into the tool, for retaining the overlapped ends, and for releasing the overlapped ends from the tool, a pair of latches (100, 106) having hooked ends (102, 108) are mounted pivotably to the base (68) so as to be pivotable between closed positions wherein the latches (100, 106) are positioned with the hooked ends (102, 108) extending into the recesses (70, 72) to retain the overlapped ends between the latch (100, 106) and the base (68) and between the hooked ends (102, 108) and the frame (78) and an open positions wherein the latches are displaced angularly from their closed position to admit the overlapped ends into the tool (10) and to release the overlapped ends from the tool (10). The latches (100, 106) are biased into their closed position. Co-acting elements including a lever (70), which can be manually squeezed toward an actuating handle (40) of the strapping tool (10), and a camming member (120), which is arranged to cam the latches (100, 106), are provided for pivoting the latches (100, 106) from their closed position into their open position.