Improvements in or relating to machines for effecting relative movements between shoes and lasts

摘要

584,874. Last pulling machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., RICKS F., and WOODCOCK, R. B. Jan. 31, 1945, No- 2405. [Class 17 (i)] [Also in Group XXIV] A support which carries a shoe in a machine for removing such shoe from its last by the action of a power driven tool is moved towards the too] by the same means which control the application of power to the tool, so that the tool is rotated only when the shoe is being moved towards it, and danger t( the operative from contact with the tool is thereby reduced With this same object a guard is interposed between the tool and the shoe, the tool acting on the counter of the shoe through the intermediary of the guard. The invention is described as applied to a machine of the general character described in Specification 354,205, the treadle 32 by which the machine is controlled being connected through a lever 28 to the last pin 22 to movethe shoe towards the rotatable tool 24, substantially as in that specification. The treadle is also connected by a rod 124 to a lever 118 pivoted at 112 to the machine frame and attached at its other end, through a ring 106 in a manner to permit rotation of such disc, to the lower disc 90 of a pair of horizontal disc members 80, 90 which compose a clutch. The disc 90 on upward movement under treadle action is positively clutched to the upper disc 80 by the engagement of pins 96 thereon in axial recesses 98 in the upper disc, the undersurface of which is provided with inclined surfaces leading to the recesses 98. The upper disc 80 which is loose on the shaft 78, is continuously driven by an electric motor through gears 86. A spring 128 mounted between collars on the rod 124 serves to declutch the discs 80, 90 when pressure on the treadle 32 is released by the operative, on termination of the shoe removal operation. A guard plate 48 of rigid material covered on both sides with layers of flexible material is carried by two curved spring rods 54, 56 which are mounted in sockets 62 at one end of a table 64 fixed to the upper part of the machine, as described in Specification 406,335, to extend the guard in front of the roll 24, which may be of wood or other rigid material. The arrangement permits yielding pressure to be developed between the shoe and the roll 24 through the guard plate when the shoe is moved towards the roll.