Patent GB-164786-A (GB)
Title: Improvements in or relating to punching and eyeletting or analogous machines
IPC: A43D100/02
Filed: 1920-01-12
Abstract: 164,786. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Jan. 12, 1920. Setting eyelets.-The machine is a power " single " punching and eyeleting machine as distinct from a duplex eyeleter such as described in Specifications 20754/02 and 117,940. Figs. 1 and 3 are front and rear perspective views respectively partly in section. The eyelets are successively detached from a movable raceway 46 by the spring-protruded spindle 14 of an upper setting- tool 10 and inserted in punched holes from above the work, work-feeding means, comprising a combined punch and clenching-tool 11, acting on the work from below to space the eyeleting; the cooperating punch block serves also as a gauge to indicate on the work the precise location at which the hole will be punched. The operating- mechanisms are actuated by a cam-shaft 26 some of them being similar to those described in Specifications 114,472 and 114,590. Setting-mechanism.-The tool 10 is carried by a plunger 12, Fig. 17, the spindle 14 extending through the tool and being normally protruded by a spring 17. When it is desired to run the machine without setting eyelets, a pivoted stop 22 is moved under washers 20, 21 on the spindle to hold it retracted and prevent it from functioning. The plunger 12 is reciprocated by a crank having a block 27, Fig. 3, engaging a slot 28 in the arm 29 of a lever 29, 30, the forked end of the arm 30 embracing a. block 31, Fig. 17, carried by a block 32 surrounding the plunger and secured thereto by a split ring 33 and set screw. The split ring engages an external groove on the plunger and is held in place by a flange 34 on the block 32. The pivot 37 of the lever 29, 30 is an eccentric pin rotatable to adjust the plunger 12 by a handle 39 held in adjusted position by a spring-pressed washer 44 bearing against an ear 40 on the handle. The lower clenching tool 11 is formed with a tubular punch 92, Fig. 4, secured to a carrier 94 having a duct 95 and a spout 96 to discharge the punchings, the carrier being reciprocated vertically in a feed carriage 97 by toggles 98, 99 pivoted to an operating rod 103 which is connected to a camoperated yoke lever 104 mounted on a fulcrum stud 51. The toggle arm 98 and its other pivot 100 are elongated to provide for the feeding movement of the carrier 94. The punch-block 106 is fixed to a plunger 107, Fig. 17, bearing in a slide 108 and having a cylindrical head 109 occupying an incomplete socket 111 formed in the member 110 of a toggle 110, 113 pivoted together at 112. The upper end of the member 113 is pivoted eccentrically on a bolt 116 whereby the toggle and punch block are adjusted. The pivot 112 is held in, or slightly in front of, its dead centre by a link 114 connected to a bell-crank lever 118 carrying a stop. The toggle may be broken against the action of a spring 119 to raise the punch block by a chain 120 connecting a treadle with the lever 118. Work feeding, adjusting, and holding mechanism.-The work-feed carriage 97 is operated from the cam-shaft by mechanism substantially the same as that described in Specifications 114,472 and 114,590 and includes a feed-regulator 142 which plays over a stationary plate 143 having a stop pin 145 engaging holes 144 to determine the position of the regulator and the length of the feeding steps. The regulator 142 is connected to the punch block 106 so that the latter also is shifted laterally to be in registration with the punch. This allows a punch block of small dimensions to be used to indicate where the hole will be punched, as described in Specification 161,660. The connection comprises a cam-groove 150 on the regulator acting on a roll 152 carried by a lever 151 adjustably connected to the slide 108, as shown in Fig. 13, by a pin 156 having an eccentric portion fitting the bore of a plug 153 rotatable and slidable in the slide 108. The slide is supported by a pin 159 and a flange 160 sliding in a guide 161 so that when the pin 156 is disconnected, the 'slide may be removed from the machine by moving it along the pin 159, the parts 109, 160 sliding in the parts 111, 161 respectively. The plunger 107 carries also a presser-foot 162 slidable therein and kept in its lowest position by a spring which causes it to press the work over the punch for the feeding movement when the hole is punched and the punch slightly retracted from the punch block. The work is supported on a table 170 having a raised central portion 171 provided with an opening 172 to admit the punch and clenching tool and allowing the set eyelet to pass without obstruction. The table is supported on a part 176 of the frame, a dowel pin on the table entering a hole 175 in the frame, and is maintained by a hinged part 174 of the frame having a screw 179 engaging a lug 178 on the table. Locking-screws 180 hold the part 174 in position. An adjustable guide 181, Fig. 14, for the work is formed on a bracket 182 connected to the slide 108 by a pivot stud 183 and acted on by an adjusting-screw 184. The bracket 182 also carries pointers 187, 188 adjustable by horizontal screws for gauging the initial positions of the first eyelet at the bottom of the left-hand quarter and the first eyelet at the top of the right-hand quarter respectively of a boot upper. Eyelets, feeding.-The eyelets are fed from a hopper 47 by a rotatable ratchet-driven brush down a raceway comprising a fixed section 45 and a movable section 46 pivoted thereto so that the delivery end moves from front to rear, the section 46 being reciprocated by a cam-actuated lever 50, Fig. 3, through a link 55. The forward end of the link is formed with a spring-closed hook for disconnectible attachment to a pivot stud 56 on the raceway, this stud and the rear pivot 54 of the link being formed with eccentric portions to allow adjustment. To minimize weight and allow high speed, the link 55 is made relatively light and slender, and is guided in a block 67 which prevents buckling. The upper section 45 is fastened to the frame by a coupling pin 68, fitting in an eccentric bushing in the raceway so that the path of the delivery end may be adjusted laterally, and by the connecting means shown in Fig. 10 which allows the raceway to be detached and replaced without losing its adjustment. This means comprises a part 72 fixed to the frame and a part 73 adjustably fastened to the section 45 by screws 74 through large screw-holes 75. The parts 72, 73 when the raceway is adjusted are connected by a threaded stud 76.