Patent GB-786852-A (GB)
Title: Machine for forming fibre laps
IPC: D01G27/04
Filed: 1954-02-25
Abstract: 786,852. Lap forming apparatus. KANEGAFUCHI BOSEKI KABUSHIKI KAISHA. Feb. 25, 1954 [Aug. 14, 1953], No. 5531/54. Class 120(1) [Also in Group XXX] A lap forming machine comprises calen, der rollers 1, 2, 3, 4, lap-forming rollers 5, 6, a press-roller 8 positioned on the lap and positively rotated at a surface speed equal to that of rollers 5, 6, rack bars 11, 12, supporting roller 8 and meshing with gears 14, 15 on a brake shaft 16, and means to release a brake lever 38 from a brake drum 33 on shaft 16 instantly when a predetermined length of fibre is wound on the lap roller 7. In the embodiment shown, rollers 5, 6 are driven by gearing, including a ratchet and pawl connection, from a main drive shaft, and roller 8 is driven by an articulated chain drive from roller 6. Shaft 16 is connected, through oppositely-directed ratchet mechanisms, to two brake drums 33, 37, Fig. 1, respectively braked by weighted levers 38, 39. Fig. 2; drum 33 loads roller 8 during lap formation, and drum 37 controls downward movement of roller 8 after ejection of a completed lap. When a predetermined length of lap has been wound, a cam 48 geared to roller 6 closes a switch 50 to energize an electro-magnet 53 and thereby initiate the following operations:-(a) release of braking pressure on drum 33, (b) rapid upward movement of press-roller 8, (c) rapid rotation of rollers 5, 6 to break the lap and wrap the loose end thereof and (d) swinging of a lap-roller magazine 54 about a pivot 117 to eject the completed lap roll and deliver a fresh lap-roller on to rollers 5, 6 for the start of a new lap. Release of braking pressure. Energization of electro-magnet 53 withdraws a rod 55 from a projection 57 on a rod 58, Fig. 2, allowing the rod to rise under the pull of a spring 59. A hook 60 on rod 58 thereby lifts brake lever 38 to a position where it rests on a projection 61 of a spring-loaded lever 62. Movement of rod 58 also causes a switch 64 to close. Raising press-roller 8 and breaking the lap. Freely mounted on shaft 16, Fig. 1,. are a ratchet wheel 68 continuously chaindriven from the main shaft, a pinion 75 geared to the forming rollers 5, 6, and a rotatable casing 72 from which a projection 88 normally engages one of two diametrically-opposite detents. Closing of switch 64 causes the operative detent to be retracted, whereby wheel 68 is clutched to casing 72 and thence to shaft 16 and to pinion 75 until projection 88 is arrested by the other detent (i.e. for one half-revolution of casing 72); the drive thus communicated to shaft 16 causes rapid upward movement of racks 10, 11 and roller 8 and that communicated to pinion 75 causes a rapid drive to rollers 5, 6 which breaks the lap. Ejection of completed lap roll and feed of new lap-roller. Lap-rollers 7, constructed with needled sections for gripping the lap end, and housed in a magazine 54 pivoted at 117. In the rear position shown of the magazine the rollers are supported by projections 132 on the machine frame; when the magazine swings forward the lowest roller is released and the next lowest is retained by spring hooks 130, Fig. 13, which in the rear position of the magazine retract into recesses 131 in the frame. When brake lever 38 is raised,. a linkage 107, 110. 111 causes a roller 112 to press forwardly on a guide 114 and cause a pawl 118 to engage teeth 119 on rack 10 which is now moving rapidly upwards; an arm 120 fixed to magazine 54 is thereby swung upwards and the magazine swings forward to eject the completed lap roll and discharge a new lap roller which falls on to rollers 5 and 6 to start the winding of a new lap. Resetting of machine. When casing 72 is arrested after one half-revolution, the rapid drive to rollers 5, 6 and racks 10, 11 ceases and, the completed roll having been ejected, the racks and press-roller 8 fall under gravity until the projecting shaft 9 of roller 8 depresses a lever 135 to (a) open a switch 138 to break the circuit to magnet 53 and re-set rod 55, and (b) depress rod 58 to open switch 64 and re-set the detent for casing 72, and to release brake lever 38 from projection 61 so that lever 39 is freed to brake the downward movement of the racks and lever 38 becomes re-operative for the next lap-forming operation. Downward movement of the racks also permits magazine 54 to swing back to its initial position.