Patent GB-654110-A (GB)
Title: Improvements in or relating to apparatus for inserting bushings in apertured members
IPC: B23P19/02
Filed: 1947-10-09
Abstract: 654,110. Assembling rubber bush mountings. FIRESTONE TIRE & RUBBER CO. Oct. 9, 1947, No. 27140. Convention date, Nov. 13, 1946. [Class 108(iii)] Apparatus for inserting a bushing in an annular non-metallic disc 12, Fig. 6, of resiliens material, having means for enlarging the hole by forcing in a pilot 32, proecting a bushing 50 into the enlarged hole and withdrawing the pilot warmed rubber discs 12 are supplied by a rotating hopper 11, Fig. 1, to a shoot 18 the end disc being located in axial alignment with a tube 62 and spindle 27 by stops 36, 37. The bushes 50 are fed from a vertically jarred hopper 51 to a shoot 52 and by an intermittently-withdrawn spring-advanced pusher 57, Fig. 5, along a magazine 53. commencing with the parts in the position shown in Figs. 1, 6 and 7, the pilot 32 being mounted in the end bush 50 and retained by a spring-pressed ball 34 and the lever 130 of an air valve 125 being in the upper position to cause piston rod 84 to move down, this moves down also a yoke 82, rods 80, arms 66 and tube 62 which ejects the end bush 50 and pilot 32 forcing this through and the bush into end disc 12. As the arms 66 reach their lowest position a valve 73 thereon engages a stop 74 and is opened to admit compressed air to a cylinder 71 to move down a rod 70 in the tube 62 to eject the pilot which is received in a cup 28, Fig. 5. As the yoke moves down fingers 104 of the arms 66 withdraw the pusher 57 and the yoke acts, through a link 141, Fig. 7, and lever 138, to bring a spring 137, connected by a link 136 with the operating lever 130 of the valve 125, into line with said lever so that, when the yoke 82 reaches its lowest position and engages a stop 133 on a link 131 connected to said lever 130, this is rapidly moved into its reverse position to cause the yoke 82 to rise. A similar rapid reversal occurs at the top of the stroke. As the yoke rises it first releases the valve 73 from its actuating stop 74 to discharge the cylinder 71 and lift the rod 70 into the tube 62 which is also moving up. Then a finger 117 pivoted to a bracket 118 on the yoke engages a fixed stop 121 and is thus caused to open a valve 113 which admits air to a cylinder 43, Figs. 1 and 3, thus moving rods 42 to eject the finished work and prevent a fresh disc 12 from moving into the assembling position, but when the tube 62 rises far enough a fresh bush 50 is moved into position. Meanwhile a spring-catch 93, Fig. 3, pivoted to the yoke 82, engaging a bar 90 lifts arms 89 and spindle 27 which carries the cup 28 so that the stem 33 of the pilot is inserted into the end bush. At this moment the tail 96 of the catch 93 engages an adjustable stop to release the bar 90 and allow the cup 28 &c. to fall. The finger 117 then passes the dead point Fig. 7 the valve 113 closes and the rods 42 are withdrawn, thus allowing a fresh disc 12 to move into position. Finally the yoke 82 engages the upper stop 133 and the cycle of operations is repeated. A catch 102, Fig. 5, prevents the bush from rising when the pilot is inserted. Specification 362,574, [Group XXV], is referred to.