Patent GB-1418723-A (GB)
Title: Tyre building machine servicer
IPC: B29C67/00
Filed: 1973-01-11
Abstract: 1418723 Tyre building apparatus NRM CORP 11 Jan 1973 [19 June 1972] 1579/73 Heading B7C A servicer 1 for supplying tyre building stock to a tyre building drum D, comprises a series of stock supply carts 3 mounted for indexing movement parallel to the drum axis to enable the carts to be moved into successive register with a stock storing and conveying means 2, each cart carrying a stock roll 16 from which tyre building stock may be supplied to the stock storing and conveying means 2, the stock storing and conveying means 2 being adapted to store tyre building stock and to convey tyre building stock to the tyre building drum D. Three carts 3 are provided, the first and second carts 3 supplying cordless ply stock and the third cart 3 supplying cord ply stock. The servicer further comprises: stock supply carts 5 for supplying finishing strips, a belt cushion, and belts; and carriers 8 and 9 for supplying tread stock and side wall stock. Stock supply carts 3.-The carts 3 are interconnected by draw-bars (10), Fig. 7 (not shown), and are driven along rails 4 by a motor 11 which is controlled by cams (14), Fig. 7 (not shown), on each cart engaging a switch LS. Each cart 3 carries a roller 15 driven by the engagement of a gear 18, Fig. 2, with a drive gear 19, Fig. 1B, of the storing and conveying means 2. The drive gear 19 is brought into engagement with the gears 18 of successive carts 3 by means of a linkage 21 and a cylinder 20. The roller 15 drives a stock roll 16 and a liner roller 17 by means of sprocket wheels (24, 25, 26), Fig. 7 (not shown), and a clutch (23). The stock roll 16 is composed of alternate layers of liner 37 and stock S. The stock S is supplied to the storing and conveying means 2 by driving the roller 15 in a counterclockwise direction (as viewed in Fig. 1B); the liner 37 is taken up on the liner roller 17. When it is desired to reload an empty stock roll 16 the drive roller 15 is driven in a clockwise direction (as viewed in Fig. 1B), to drive the stock roll 16 in a counterclockwise direction through a chain (34), Fig. 7 (not shown). The replenishing stock and the liner 37 from the liner roller 17 are then wound on to the stock roll 16. Stock storing and conveying means.-The stock storing and conveying means 2 comprises a base unit 50, Fig. 1B, having a forwardly and upwardly inclined portion 51 which terminates in a discharge conveyer section 52 moved by means of a cylinder 53 between an operative position and an upwardly-retracted position. A drive motor 54 drives the drive gear 19 and the drive gear 60 of a conveyer assembly 62. The conveyer assembly 62 is mounted on parallel support shafts 61 for transverse centering movement across the inclined portion 51. The conveyer assembly 62 is centered with respect to the tyre building drum D, while supplying stock, by means of sensing units 66, Fig. 1A. Sensing units (67, 68), Figs. 5 and 5A (not shown), are also provided to detect the presence of stock S. The conveyer assembly 62 includes three multiple-belt conveyers 81, 82, 83. Stock is turned by concave plates (84, 85), Figs. 6A and 6B (not shown), to pass successively along the three conveyers. A stock severing device 69, Fig. 1B, is provided above the conveyer assembly 62 and is controlled by a stock measuring device 95 having sensing units 96, 97. Stock supply carts 5.-The carts 5 are interconnected and mounted on rails 6. A motor 110 drives the carts 5 and is controlled by a stop pin 112 actuated by a cylinder 113. The carts 5 are each of similar construction except that the one cart 5 has two stock rollers 114 and two supply trays 7 while the remaining carts 5 have single stock rollers and trays. Each cart 5 has a roller 117 for taking up a liner L. One cart 5 supplies finishing strips, and the remaining carts supply a belt cushion and belts. Side wall carriers.-The two side wall carriers 9, Fig. 1A, each comprise a conveyer 132 mounted on rails for movement between a retracted position and an operating position. The side wall strips SW, Fig. 8 (not shown), are guided between adjustable guides 135. The conveyers 132 are laterally adjusted by means o a hand wheel 137.  Tread carrier.-The tread carrier 8, Fig. 1A, comprises two conveyer sections 140, 141 which carry a tread stock strip T in a looped configuration. The conveyer sections 140, 141 are supported on links 142 and are movable between retracted positions and operating positions. A stitching roller 147 movable by means of a cylinder 146 is provided for stitching the tread stock strip T against the crown portion of the tyre carcass.