Patent GB-723116-A (GB)
Title: Improvements in or relating to counter moulding machines
IPC: A43D8/40
Filed: 1952-12-08
Abstract: 723,116. Counter moulding machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., HOLYOAK, J. K., ROBBINS, J., SMART, W. A., and WILLS, A. E. Dec. 8, 1952 [Dec. 7, 1951], No. 28677/51. Class 17 (1). A counter moulding machine comprises cooperating male and female moulds and presenting mechanism whereby blanks are automatically fed one by one from a magazine to the moulds. The moulding machine described is similar in construction, method of driving &c. to those described in Specifications 268,032, [Class 17 (i)], and 481,867, and the presenting device is generally similar to that described in Specification 495,796. A column C of partially-prepared concaveconvex blanks B is located on a platform 2 by means of notches N in the blanks engaging a rib 12 on the platform, guide rails 94, and means 36, 82, 82<SP>1</SP> urging the column rearwardly against abutments 18, 20, 20<SP>1</SP>. Tapering runners may be fitted to the platform if the lower margin of the blank is convex. The presser element 36 is connected to a trolley 32 which is normally urged rearwardly by means of a weight 46, but may be moved forwardly by means of a wire 48 passing over pulley 50 to a treadle. Element 82 is secured to a bracket 70 (similarly 82<SP>1</SP> is secured to 70<SP>1</SP> &c. not shown) pivoted to the ends of link 68 and arm 64 which are parallel to each other and at the other end are pivoted at 58, 66 to a trolley 56 movable on the guideway 30. Arms 62, 62<SP>1</SP> (not shown) extending from arms 64, 64<SP>1</SP> (not shown) are joined by a bracket 76, and links 68, 68<SP>1</SP> (not shown) by a bridge 80. Elements 82, 82<SP>1</SP> are swung up from the normal position (Fig. 1) by depression of handle 78, the bracket 70 being at all times vertical. Stop faces 84 limit the movement of arms 62, 62<SP>1</SP>. Trolley 56, and hence elements 82, is urged rearwardly by means of a weight 92. Initially elements 36, 82 and 82<SP>1</SP> are withdrawn, but to replenish during operation element 36 is withdrawn more blanks B inserted before elements 82, 82<SP>1</SP>, element 36 restored, and elements 82, 82<SP>1</SP> withdrawn and then restored. The rearmost blank B is automatically lifted by selector mechanism S comprising vertical fingers 96, 96<SP>1</SP> which are moved upwardly so that rolls 98, 98<SP>1</SP> pass over the rear face of the blank, and blocks 100, 100<SP>1</SP> engage beneath the blank to raise it to the position shown in Fig. 4. Fingers 96, 96<SP>1</SP> are moved up and down by means of cams 142, 144 driven through 156, 154, 152, 150, 148, 146 and engaging rolls 138, 140 on arms 132, 130 of a three-armed lever, the third arm 128 engages a roll 124 on a rack bar 118 to move the latter in a guideway 120, and teeth 116 on the bar mesh with a pinion 114 to rotate a shaft 112. Pinions 110 (not shown), 110<SP>1</SP> fixed to shaft 112 mesh with racks 104 (not shown), 104<SP>1</SP> to which the fingers 96, 96<SP>1</SP> are secured. The raised blank B is introduced into grippers G, G<SP>1</SP> which close to grip the blank and then move to bend the blank to a U-shape and transfer it to a presenting device D. The jaw 160<SP>1</SP> with a pricker point extends from a vertical stud 166<SP>1</SP> and the jaw 158<SP>1</SP>, having a recess to receive the pricker point is urged to the closed position by spring 174<SP>1</SP>. Stud 166<SP>1</SP> is spring-urged downwardly in a sleeve forming part of a trolley 178', a pin on the stud and slot in the sleeve limiting the vertical movement of the stud in the sleeve and preventing relative rotation. The gripper can be adjusted angularly relative to the trolley 178<SP>1</SP> by means of a screw'186' and arcuate slot 188<SP>1</SP>. The trolley 178<SP>1</SP> has limited movement on a guideway 196<SP>1</SP> fast on a shaft 200<SP>1</SP>, and is spring- urged away from shaft 200<SP>1</SP> to the normal position . at the end of slot 202<SP>1</SP>, as in Fig. 15. A pinion 204<SP>1</SP> is fixed to shaft 200<SP>1</SP> which is rotatable in a bearing formed in a cross head 208, a collar 209<SP>1</SP> and arm 198<SP>1</SP> preventing vertical movement of the shaft. The hollow cross head is mounted for up and down and forward and rearward movement on ears each carrying a roll on a transverse axis and a roll on a lengthwise axis to engage guideways in wings 228, 228<SP>1</SP> (not shown). The latter form part of a carriage 232 (not shown) which is movable forwardly and rearwardly on rolls engaging guides. A link 252 is pivoted at 250 to the carriage and at 254 to the arm 256 of a three-armed lever 256, 258, 260 pivoted on shaft 134, arms 258, 260 carrying rolls 262, 266 which engage cams 264, and another (not shown) fast on shaft 146, so that rotation of shaft 146 moves carriage 232 and wings 228, and hence crosshead 208 and grippers G, G<SP>1</SP> forwardly or rearwardly. To move the crosshead 208 and grippers G, G' up and down a bevel pinion 268 is fixed to the end of shaft 146 and drives a bevel pinion 270 which is rotatable in lug 272 and splined to a shaft 274 passing through a bearing 276 on wing 228<SP>1</SP>. A bevel pinion 278 is fixed to the end of shaft 274 and a collar 280 is attached so that as wings 228, 228<SP>1</SP> move forwardly or rearwardly shaft 274 moves with them, but is still driven by pinion 270 which does not move longitudinally. Pinion 278 meshes with a bevel pinion 282 on a vertical shaft 284 which is prevented from moving longitudinally by collars 290, 292. A coupling member 294 on shaft 284 is splined to a shaft 296 rotatable on a bearing 298 in a bracket 300 secured to the cross head 208. A bevel pinion 302 on shaft 296 prevents vertical movement of the shaft, continues to be driven when the bearing 298 moves vertically with the machine, and meshes with a bevel pinion 306 fixed to a cam shaft 308. Cams 314 314<SP>1</SP> on shaft 308 engage cam rolls 316 attached to wings 228, 228<SP>1</SP> to control the up and down movement of cross head 208 on wings 228, 228<SP>1</SP>. The cross head is raised by pivoted levers 320 carrying cam rolls 324 which engage cams 326 on shaft 146. An abutment surface 328 on each lever is thus movable to engage beneath and lift a rod 330 when the latter move backwards with carriage 232, the rods then engaging lugs 338 (not shown) to lift the cross head. When the carriage moves forwards again rods 330 run off surfaces 328 and the position of the cross head 208 is controlled by cams 314. Shafts 200, 200<SP>1</SP> are rotated to swing the grippers G, G<SP>1</SP> by movement of racks 340, 340<SP>1</SP> engaging pinions 204, 204<SP>1</SP>. The racks are connected by links 342, 342<SP>1</SP> to pivoted levers 348, 348<SP>1</SP>, 350 which carry a roll 354 urged by spring 356 to engage cam 358 on shaft 308. Gripper G<SP>1</SP> (and similarly G) is opened by a pusher element 360<SP>1</SP> adjustable on arm 362<SP>1</SP> pivoted on stud 366<SP>1</SP> and connected by a ball and socket joint 372<SP>1</SP> to a link 374<SP>1</SP> which is joined by ball and socket to a pivoted lever carrying a cam roll. The latter is held in contact with a cam on shaft 308 by a spring. In each cycle the element 360<SP>1</SP> engages arm 172<SP>1</SP> to open the gripper against the action of spring 174<SP>1</SP>, and at another time in the cycle the grippers are opened by engagement of arms 172, 172<SP>1</SP> with a bar 388. Blanks B held in grippers G, G<SP>1</SP> at undesired times are removed by an ejector blade 390 which is oscillated by means of a cam on shaft 308 through a spring-urged roll on a lever pivoted on shaft 410, and further links. Device D comprises a main casting 420 to which are fixed outer jaws 422, 422<SP>1</SP> of grippers H, H<SP>1</SP>. An inner jaw 424<SP>1</SP> of gripper H<SP>1</SP> (similarly with gripper H) forms part of one arm 426<SP>1</SP> of a bell-crank 426<SP>1</SP>, 428<SP>1</SP> pivoted at 430'. Arm 428<SP>1</SP> is pivoted at 432<SP>1</SP> to a link 434<SP>1</SP> which is pivoted at 436<SP>1</SP> to an arm 438<SP>1</SP> fixed to a shaft 440<SP>1</SP>. An arm 442<SP>1</SP> on shaft 440<SP>1</SP> is engaged by one end of a ball-ended strut 446<SP>1</SP>, the other end engaging an actuating member 450 fixed to a shaft 452. If the latter is turned, struts 446, 446' are thrust apart as in Fig. 20, against the action of spring 453 to move jaws 424, 424<SP>1</SP> towards each other to open grippers H, H<SP>1</SP>. Shaft 452 has a toothed surface 456 meshing with a rack 458 on member 460 which slides on a shaft 462, turning being prevented by splines 464 engaging guides 466 in fixed lugs 468, 470. Cam piece 474 and flange 476 on shaft 462 abut lugs 468, 470 to prevent axial movement. A cam surface 478 on the face of cam 474 engages a slidable pin 480 which also engages element 460. When cam 474 turns, from the position shown in Fig. 21, under the action of spring 482 element 460 is moved by springs 488 thus turning shaft 452, and spring 453 closes grippers H, H<SP>1</SP>. For part of each cycle the cam 474 is held, so that the grippers are open, by means of a member 490 pivoted at 492, slotted to receive shaft 462, and formed with a tooth 498 to engage a lug 500 on arm 501 of cam 474. Thus with member 490 in the upper position (Fig. 18) tooth 498 abuts lug 500 to hold cam 474, but when the carriage 232 is given a final rearward movement the abutment 417 (Fig. 1) depresses the roll 418 on member 490 against the action of spring 504, depressing tooth 498 beneath lug 500, and allowing cam 474 to turn and grippers H, H<SP>1</SP> to close. Pivoted guide fingers 507, 509 engage the blank B rearward of grippers H, H<SP>1</SP> to aid its entry into the latter. The device D is then moved to carry the blank B in grippers H, H<SP>1</SP> rearwards and upwards to the moulding means M. The device D is pivotally mounted on connected arms 520, 520<SP>1</SP> (not shown) which are pivoted at 522 on the platform 508. An arm 526 integral with 520<SP>1</SP> i