Patent GB-400599-A (GB)
Title: Improvements in or relating to shoe-upper conforming machines
IPC: A43D21/12
Filed: 1932-04-25
Abstract: 400,599. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., Belgrave Road, Leicester.- (United Shoe Machinery Corporation ; Paterson, New Jersey, U.S.A.) April 25, 1932, No. 11795. [Class 17 (i).] Pulling-over.-Relates to shoe-upper conforming machines wherein a gripper has a pair of jaws relatively movable to grip the upper, and consists in jaw closing mechanism comprising a member given a rotary movement about an axis extending lengthwise of the gripper or in the direction of pull. Guides are provided for the grippers, yieldable toward the work, and means are provided for closing the toe grippers before the side grippers, when desired. The gripper casing 72 carries a fixed jaw 74 and a pivoted jaw 76 closed by a roll 84 co-operating with cam surfaces 86, 88 on a slide 82 movable in the direction of pull. The surfaces 86, 88 are formed to give a quick closure and strong grip, respectively, on relative rise of the slide. The slide has vertical slots to engage a pin 100 on a slide 94 urged away from the slide 82 by a spring 104 and s'crewthreaded to engage a rotary member 92 also formed with a screw thread 106 of opposite sense to the first and engaging a nut 108 fixed in the casing. The member 92 is slidably keyed to a rod 113 rotated by a rod 122 which also serves for transmitting the upper stretching pull to the gripper. Rotation of the rod 122 rotates the member 92 to close or open the gripper, the action being accelerated by a lengthwise movement of the member 92 imparted by the nut 108. For rotating the shafts 122, each is formed with an elongated pinion 128, the pinions on one side of the shoe being driven bv a rack 130 actuated by an arm 136 and a cam-operated lever. A similar arm and rack actuate the pinions on the other side of the shoe, but a pinion and second rack are interposed in the drive to cause all the pinions 128 to be driven in the same direction. The toe pincer pinion is driven by spur gearing 166, 168 from a rack 170 urged to gripper closing position by a spring 172 abutting against a pin moving with the first rack, the rack 170 being normally restrained from movement by its spring by a latch 182 pivoted to the first rack engaging an arm 184 on the rack 170. The latch has a lug co-operating with an arm actuated bv a link 204 and treadle 214, depression of which releases the latch and allows the spring 172 to close the toe pincer. If it is desired to open this pincer, a handle 224 is pulled, this handle being connected by a rod 230 with an arm 234, which engages the arm 184 to return the slide 170. As the side pincers close, the latch is carried beyond the rear position of the arm 184 so that the latch is re-engaged with the arm as the parts return to starting position after an upper pulling operation. The upper stretching pull is given by cam-actuated levers 240, 318, the first lever being linked to a plate 256 connected to the lower ends of the rods 122 of the forward pincers. The side levers are connected with the rear side pincers through equalizing levers. The side pincers are guided by plates 352 flanged to engage guide-ways 354 on the casing, the plates being pivoted in a fork on a sleeve 362 retained in a bearing at the upper end of a lever 364 pivoted at its lower end in a holder 370 adjustable about an arc-shaped rib concentric with the axis of the gripper for angular adjustment to style of shoe. The lever is urged away from the shoe by a spring 382 to a limit determined by an adjustable stop 384. In the case of the toe pincer, the sleeve 362 engages a fixed bearing and is yieldable axially toward the shoe.