Patent GB-601556-A (GB)
Title: Improvements in or relating to fastener assemblages and means adapted for use in installation thereof in a workpiece
IPC: A43D100/02
Filed: 1945-11-12
Abstract: 601,556. Eyeleting. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Nov. 12, 1945, Nos. 30141/45 and 25016/46. [Class 43] A fastener assembly, providing a throat for a rope or the like, comprises two elements between which an apertured workpiece is clamped, a large tubular barrel extending through the aperture and holding the elements together, and a number of smaller barrels extending through the workpiece and maintaining clamping pressure around the large barrel. A device for installing the assembly comprises an anvil for the support of an eyelet-like barrelled fastener element; a taper-ended workpiercing member telescopically mounted in the anvil and normally held by resilient means so that it extends through the element, and further means for locking it against depression into the anvil. A machine for installing a form of the fastener wherein all the barrels and one clamping element are integral comprises an anvil and a power-driven cam bearing a tool-carrier movable from a position in which a presser tool registers with the anvil to one in which a setting tool registers therewith, the tool-carrier being powerdriven between these positions at half the frequency at which the cam is moved, so that one downward stroke of the cam causes the presser tool to impale the work on a fastener element and the next downward stroke causes the setting tool to clinch the element. A grommet-like element 15, Fig. 2, has a short tubular barrel 14 and an annular flange 36 in which are six equally-spaced holes 16 for receiving small eyelet-like barrelled elements 17, Fig. 4. A rigid washer-like element 18, Fig. 4, has a central hole 19, and six equallyspaced smaller holes 20 in its annulus 37. To instal the assembly use is made of an anvil block 13, Fig. 4, with six anvils 21 each having a taperended pilot 22 with a groove 23 round its base for roll-clinching each element 17. The element 15 is placed flange-down on the block 13, a pilot 22 projecting through each hole 16; a workpiece 10 is,pressed down so that the barrel 14 and pilots 22 go through corresponding holes therein; the element 18 is then positioned with the barrel and pilots going through their corresponding holes 19, 20. An unclenched element 17 is placed on each pilot 22 and is driven through the assembly until its base is seated on the element 18, a hammer and hand tool 25, Fig. 5, being used for this, the hand tool having a setting piece 26 with a central bore 27 for reception of the pilot 22 and a grooved annular seat 28 for the head of the element 17. A second round with the hand tool and hammer is now made to roll-clinch the elements 17 against the anvil 21. Finally the barrel 14 is rollclinched by means of a hammer and another hand tool 30 (Fig. 7) comprising a clenching piece 31 having a pilot 32 with an annular clenching surface 33. In a modification the single element 15 is replaced by two elements, one of which is similar to the washer-like element 18, while the other resembles the element 15 but has a narrower flange. Another device for installing the assembly of Fig. 4 comprises an anvil 40, Fig. 10, fixed in a base 42, a plunger 46 sliding vertically and centrally within the parts 40, 42 and raised by a spring 48, while a key 50 in the part 40 engages a groove 52 in the plunger 46 to prevent its rotation, and six taper-ended spindles 54 sliding in vertical bores 56 in the part 40 and raised by springs 58 while their lower end portions 60 project below bushings 62 which keep the springs 58 under compression. One element 17 is placed head downwards on each spindle 54 and an element 15 is positioned; a perforated workpiece 10<1>, Fig. 14, is threaded over the plunger 46 and is pushed down by a hammer and a hand tool 68, which has a pressing portion 70 in which are six holes 72 for the elements 17 and an annular cavity 73 for the barrel 14, this cavity lying between the portion 70 and a pilot 74 of the same diameter as the plunger 46, in which there is a groove 78 for receiving a key 76 which is set in the pilot 74 and ensures that the holes 72 register with the spindles 54. As soon as the plunger 46 is depressed the spindles 54 are locked in raised positions so that their ends puncture the workpiece, forming holes for the elements 17. The locking mechanism, Fig. 10, comprises six pins 80 which slide horizontally in radial bores in the bore 42; when operative, a reduced part 90 of each pin lies beneath each spindle 54, notches 88 in the outer ends of the pins 80 being engaged by leaf springs 82, which are anchored to the part 42 and are weaker than the spring 48; normally a conical cam 84, integral with the plunger 46, and raised by the spring 48, engages the inner ends of six pins 86 which slide in bores parallel to the pins 80, thus causing the outer ends of the pins 86 to abut against the leaf-springs 82 forcing the pins 80 outwards. When the tool 68 is removed after this pressing operation the spindles 54 are automatically unlocked, and an element 18 is positioned, the upper ends of the elements 17 being clenched by a hammer and a hand tool 92, Fig. 15, having an annular clenching surface 94 and a pilot 96 with a pit 98 in its lower end for receiving the end of a spindle 54 to depress it. Finally the barrel 14 is clenched by a hand tool similar to, but larger than, the tool 92. In a second form of fastener, Fig. 17, the elements 15 and 17 are combined into one element 110 having a large barrel 120 and six smaller ones 122, the other part 108 being the same as the element 18. A machine, Figs. 21 and 22, for installing this assembly includes an upstanding column 124 having at its lower end a horizontal bed 126 supporting a stationary anvil 128 and a lower slide 130 which moves in a groove 132 in the bed. A block 144 fixed to a vertically movable ram 146 has a dove-tail connection 142 with an upper horizontal slide 134 which carries a work-presser 136, and a tool head 140 carrying six small setting tools 138 and a large setting tool 172. The two slides 130, 134 are connected by a vertical coupling pin 148 anchored to the slide 130 and having a telescopic engagement with the slide 134. The anvil 128, Fig. 19, has a central pin 156 and six spindles 158, all spring-urged upwards, and has fixed in it a retaining pin (not shown) which engages a slot 164 in the pin 156 to restrict its movement. The lower ends of the spindles 158 abut against the flat upper face 166 of the slide 130 when the latter is in its forward position, but can be depressed when it is in its rear position. The work presser, Fig. 21, has a flat work-engaging face, a socket for the barrel 120 and pin 156, and six small holes 168 for receiving the barrels 122 without fouling the spindles 158. The ram 146 slides in vertical guideways forming part of the column 124 and is reciprocated by a crank pin and connecting rod (not shown), the former being carried by a horizontal power-driven shaft 150, journalled in the column 124 at 152 and provided with a onerevolution clutch (not shown) connected to a treadle-controlled rod 154. The slides 130, 134 are moved to and fro by mechanism including a cam member 176 which has an internal gear 178 and an external cam surface 180, and which is rotatably mounted upon a cylindrical collar 182 keyed to the shaft 150. A pinion 184, formed on the collar 182, engages an intermediate gear 186 which meshes with the gear 178, so that the cam member 176 is driven at half the rate of the shaft 150; the gear 186 turns on a fixed pin 188 mounted in a fixed bracket 190 which has a bore engaging the shaft 150 and another engaging a fixed pin 192. The cam surface 180, which consists essentially of a largeradiused segment 212 and a diametrically opposite small-radiused concentric segment 214, engages a roll 194 carried by an arm 196 which can be swung to and iro about the pin 192, the roll 194 being held against the cam surface 180 by a spring 198, Fig. 21, connected to the arm 196. A link 200 connects the lower end of the arm 196 with one arm 202 of a bell-crank lever, which also has a pair of arms 204 bridged by a pivot pin 206 connected to the pin 148 by a forked link member '208, and which is mounted on a vertical fulcrum stud 210 mounted in the bed 126. The machine has a cycle of four strokes of the ram 146. To instal the second type of fastener the element 110 is placed on the anvil 128 and a workpiece having a hole already punched in it is placed over the spindle 156. With the machine in the initial position, Fig. 21, the slides 130, 134 are forward, the work presser 136 being in register with the anvil 128 and the spindles 158 being locked against depression by the slide 130 so that they can puncture the workpiece. The operator then trips the clutch, bringing about one revolution of the shaft 150, during which the segment 214 engages the roll 194, the ram being depressed so that the work presser 136 impales the work on the barrels 120, 122 of the element 110 and raised so that the slides 130, 134 move to their rear positions, the tool head 140 now being in register with the anvil 128 and the spindles 158 unlocked. The element 108 is now positioned and the clutch is tripped again. During the second revolution of the shaft 150 the segment 212 engages the roll 194; during the down stroke of the ram the tool head 140 clenches all the barrels, the spindles 158 and pin 156 being depressed by the pilots 138, 172; during the final upstroke the slides return forward under the action of the spring 198. Specification 8108/03, [Class 43], is referred to.