Patent GB-313003-A (GB)
Title: Means for feeding bolt blanks and like articles in succession automatically
IPC: B23Q7/00
Filed: 1928-02-06
Abstract: 313,003. Landis Machine Co., (Assignees of Mathias, S. W.). Nov. 28, 1927. [Convention date]. Divided on 301,371. Lathes; screwing.-Means for feeding bolt blanks and like articles in succession automatically is described with particular reference, to supplying such blanks to the machine described in Specification 301,371. Blanks are supplied from a hopper C to a shoot 107, Figs. 5 and 10, by sector blades 106 passing through a slot in the hopper and spaced apart according to the diameter of bolt shank so that the blanks hang in the shoot by their heads. The blades 106 are carried by an arm 105 on a rock shaft actuated bv a second arm linked through universal joints to a crank on a cam shaft of the machine. The shoot is covered by a. plate 131 with spring controlled hinged extensions 131', 131<2>, Fig. 10, to prevent the heads of the bolts from riding up, and the sides of the shoot terminate in stop blocks' 129 and M adjustable according to the length and diameter of the blanks.. The hinged construction is for the convenience of the operator in removing jammed bolts. The stop M comprises two pivoted fingers 126 with upturned ends which normally prevent the blanks passing laterally across the stop 129. The fingers are spaced by a block 128, carrying a mounting for a spring plunger controlling the fingers 126, and by blocks 107<4>. The fingers 126 and blocks so far described are adjustably positioned in a frame by spacers 107<3> of vary. ing thickness. By changing or removing the blocks between the fingers the distance apart of them may be adjusted to suit transfer fingers 108 of varying width and by moving spacers 107<3> from one side to the other of the pair of fingers, the position of the fingers may be adjusted to suit the length of blank in use. Fingers 108, Fig. 6. take the lowest blank from the shoot and insert it into the work-holding jaws on the turret. To this end they are so mounted as to be capable of rotation through 180‹ in two planes at right angles. These movements are imparted by cams acting through systems of bars, levers, and links the two movements being out of phase so as only to be in part simultaneous. In taking a blank from the shoot the arm 108<1>, Fig. 6, is rotated 180‹ in the plane of the paper by a pinion 108<4> meshing with a rack bar 109 operated by one of the cams. The rack bar and its related parts are mounted in a sleeve provided with a pinion 110<1> actuated by a rack bar 111 controlled by the other cam to impart movement through 180‹ about the rack bar 109 as axis. The first movement is positive and removes the blank from the shoot and the second movement is controlled by a spring 120 and carries it into the work-holding jaws, the spring permitting yield if an obstruction exists. During the return the second movement commences first and is positive and the first movement is under the control of a spring 116 permitting yielding if the fingers 108 cannot enter between the stop blocks. The rack 109 engages a stop screw 183 to determine the blank receiving position of the fingers 108 and in this position they are squared with the shoot by adjusting the rack 111 relatively to its operating mechanism at 184, Fig. 6. The extent to which the work is fed into the work-holding jaws is controlled by a stop 185 on the rack 111 contacting with the casing in which the rack slides and the fingers 108 are squared relatively to the jaws by adjusting on its rock shaft the cam lever operating the rack 109. The mounting for the fingers 108 and the two rack bars is adjustable relatively to the shoot to vary the extent to which the blank is introduced into the jaws.