Patent GB-107615-A (GB)
Title: Improvements in or relating to Slugging Machines adapted for Multi-row Slugging in the Manufacture of Boots and Shoes.
IPC: A43D69/04
Filed: 1916-06-03
Abstract: 107,615. Briggs, T., and British United Shoe Machinery Co. June 3, 1916. Slugging. - Relates t) multiple-row slugging machines, and particularly to machines for inserting two rows of slugs in soles and heels, especially in heels before attachment, and consists in improved awl-controlling devices and in improved means for setting the machine so that normally it will insert either one or two rows of fasteners but can be changed readily to insert two rows or one as the case may be. The invention is described as applied to a tworow slugging-machine in which the horncontrolling mechanism is substantially similar to that described in Specification 12,329/10, and in which means are provided to locate the first slug of a series and automatically to stop slugging when the end of the work is reached, as described in Specification 12,539/10. The machine bead and the mechanisms it bears are of known type, and are such that only the parts which produce work-penetrating movement of the awl and which effect wire feed are stopped when the operator causes an interruption in slugging, as when changing the work. Figs. 7, 7<a>, and 7<b> indicate these known parts, an awl bar or awl-carrying lever D" being vertically reciprocated and the wire-feed mechan. ism operated from a shaft 48 actuated by an arm 50 adapted to be latched to and unlatched from a continuously rocked arm 52, there being a spring- controlled latching bolt 60 and a treadle-controlled bolt-operating arm Z<3> ; this arm is further controlled by a double-level cam 180 acting on a spring-pressed plunger 170 in the arm z<3> to move a trigger 172 out of line with a stop 184 and allow the arm Z<3> to complete its downward movement and effect withdrawal of the bolt 60 out of the arm 52. The awl D remains at all times in a guiding-perforation in a plate 44 which is moved to and fro in the line of feed. In the present machine, the arm Z<3>, instead of being operated as indicated above, is controlled by the edge of a cam Z', Fig. 1, described in Specification 12,329/10 as operating to move the horn into workholding position. The machine of the present invention is provided with onlv one awl D, Fig. 1, carried by a lever D' which is formed with a projection D<2> adapted to be engaged by a surface G<2> on a continuously-running pusher link G. This link is guided by a slot G<1> engaging a screw A<2> in the frame, and is connected to a lever F having a slotted connexion to an adjustable block E<2> on an arm E' projecting from an awl-feed lever E below its central pivot E<x>. After the lever D' has caused the awl to penetrate the work, the pusher link engages the projection D<2> and moves the lever laterally for feed; the return movement is effected by a spring A<3> and is limited by an adjustable screw A<4>. When the lever D' is raised and inoperative, the projection D<2> rests on the upper surface of the reciprocating pusher link, and no feeding movement is imparted to the awl. To prevent the awl from over-running after its lever D' has been pushed by the link G, the lever is provided with a boss adapted to engage a pin eccentrically mounted on the cover plate of the frame. The wire-feeding mechanism comprises duplicate sets of wire-grippers provided with teeth to give a more positive feed to stout wires, and the wire guides are arranged so that the wire is fed in a uniformly curved path. In order that the second wire feed may be cut out when desired, the second wire-gripper is oscillated by a link E', Figs. 1 and 4, pivoted to a slide block K<2> mounted in an arm L, which is continuously operated through a link L<2> from a cam on the main shaft. The block is connected through a link K<4> to a pivoted lever K<3>, which has a screw and slot connexion Q<4> with a lever Q<3> secured on a shaft Q*. This shaft carries a disk Q formed with two projections Q<1>, Q<2> adapted to be engaged by a double trip pawl P pivoted upon the end of a lever P<1> oscillated from the main shaft. The pawl is connected through the link O, N<1>, and segment gearing N<2>, M<2>, to a treadle rod M. When this rod is turned to cause the pawl P to engage the lower projections Q<2>, the block K<2> is moved into a position concentric with the centre about which the link L<2> is oscillated, and no feed is imparted to the second wire; conversely, when the treadle rod is turned so that the pawl is in engagement with the projection Q', the block K<2> is moved outwards along its slideway, and feed of the second wire takes place. The treadle rod M is operated from a knee lever M', Fig. 6, which is pivoted at M* to the end of a link S pivoted to the machine standard. The other end of the lever carries a spring detent M<3> adapted to engage one or other of two holes T<1>, T<2> in a lever T secured to the treadle rod M. When the detent is in engagement with the hole T<1>, the machine is set normally to insert two slugs, and movement of the knee lever will stop the feed of the second wire; when the detent is in the hole T<2>, the machine normally inserts one row of slugs, and the movement of the knee lever will then cause it to drive both rows. Specifications 17,431/05, 15,957/09, and 26,859/10 also are referred to.