Patent GB-957046-A (GB)
Title: Improvements in or relating to machines organised for applying a ribbed strip to inso
IPC: A43D43/06
Filed: 1960-06-30
Abstract: 957,046. Applying ribs to insoles. BRITISH UNITED SHOE MACHINERY CO. Ltd. June 30, 1960 [July 2, 1959], No. 22859/60. Heading A3B. A machine for attaching a ribbed strip S to an insole has a support 64 for the insole, means 100 for feeding the insole and progressively attaching the strip, an edge gauge 530 to control the lateral position of the insole, and means acting automatically to move the edge gauge laterally during operation of the machine to enable the strip to be attached at variable distances from the edge of the insole. The feeding and attaching means is stopped automatically after a predetermined time, and is connected to means for feeding the strip. The work support comprising a table 62 and roll 64 on a slide 58 is urged upwardly by a spring, but is lowered to allow insertion of an insole by depression of treadle 82 (not shown) which works the supporting toggle 70, 74. The initial heightwise position of the support is adjusted by means of a screw 104 which raises or lowers the toggle, a hand wheel 108 secured to the screw being graduated in irons. The heel gauge 116 is adjustable forwardly and rearwardly by means of screw 122, and is raised out of engagement with the insole upon depression of the starting treadle. The strip S is fed from a reel 150 round pulley 154, over a spreader which spreads out the flanges, through a slot in guide member 170, along a downwardly and inwardly inclined surface of a heated block 172, and through a slot in a second guide member by toothed rolls. The latter, which are urged together by a spring and may be parted for feeding the strip, are driven in timed relation to the intermittent feed of the insole by the presser foot 100, from a drive member of the presser foot via a one way roller clutch 228, 230 &c., a second clutch 222, 224 preventing reverse rotation. The strip guiding and feeding means is normally raised by a spring 526 away from the heated nozzle 172, while the machine is idle, to prevent softening of the adhesive of the strip itself, but is Towered into engagement with the nozzle when the treadle 148 is depressed, by means of a solenoid 524. The presser foot 100 is moved in a counterclockwise direction through an elliptical path by means of eccentrics 264, 302 on the main shaft 266 acting via mechanism similar to that described in Specification 707,899. An adjustable stop determines the maximum length of the feeding component of movement of the presser foot, and hence the maximum rate of the feed of the work. To prevent backfeed of the work, the inner flange of the strip is engaged by a holddown 742 which is normally latched in raised position. Operation of the treadle releases the latch, and thereafter movement of the presser foot bar 240 acts via a rocking arrangement to produce reverse movement of the holddown. The rod C of adhesive is fed by wheels 344,346 from a reel 336 through a guide tube 342 to a casing 350 heated by units 352, and the melted adhesive passes through a driven disc 356 to a chamber 360 from where it is pumped by gears 362, 364, to an inclined passageway 366 which is heated by units 370 and normally closed by valve 374. When treadle 148 (not shown) is depressed it causes a switch 392 to close, energising solenoid 390 which moves rock bar 380, and the latter acts via pinion 378 to rotate valve 374 so as to bring the orifice 372 into communication with passageway 366. The cement then flows through passages 401, (not shown), 402, to a plurality of capillary grooves 403, and is expanded as a plurality of threads on to the flanges of the strip. The cement sets almost instanteously as the strip contacts the insole. Release of the treadle closes valve 374 and stops the supply of cement. If the treadle is depressed before the rod C is sufficiently heated link 384 moves relatively to rack 380. Wheels 344, 346 and disc 356 are rotated by mechanism which is actuated by movement of the presser foot bar 240, and includes an adjustable connection 404, 406 by which the rod feed increments may be varied, and clutches which slip if operation is commenced before the cement is sufficiently melted. To ensure a prompt supply of adhesive to the leading end of the strip when the treadle is first depressed, feed wheels 344, 346 are initially rotated by means of a solenoid 490 (not shown) which is energized by depression of the treadle. The edge gauge 530 which rests on roll 64 is adjustable in the direction of feed, is movable with table 62 when the latter is lowered to allow insertion of an insole, and is moved transversely of the line of feed by means of a cam 580 acting via a slide 552 which is adjustable in length. Cam 580 is driven via gears 594, 596, in one direction or the other according to whether the insole is left or right, by gear 606 or 608, the required gear being locked in engagement by manual operation of arm 624. Gear 606 or 608 is driven intermittently in timed relation to the operation of the presser foot by movement of the presser foot bar 240 acting via mechanism including clutches which prevent reverse movement of the gears. The arrangement is such that rotation of cam 580 is co-ordinated with the feed of the work so that it will complete one revolution in the time required to attach a strip around an insole whatever the size of the insole or the rate of feed. The speed of rotation of the cam is varied in accordance with the size of the insole by means of an adjustable stop 696, associated with a shoe size dial, which determines the angular relationship of parts of the cam drive mechanism, a lost motion device permitting the rate of feed of the insole to be varied, at the will of the operator, without affecting the rate of rotation of cam 580 in accordance with the setting of the shoe size dial. Cam 580 may be modified for use with shoes of different styles by means of detachable and interchangeable auxiliary cam members which are adjustably positioned on the cam to modify the surface thereof. The two parts 146, 147 of the operating rod from the treadle 148 are normally latched together so that operation of the treadle starts an attaching operation, but when cam 580 completes one revolution, i.e. an attaching cycle, a block 810 (not shown) adjustable thereon causes solenoid 806 to be energized and the latter brakes the latch, 788, 796 (not shown), whereupon the presser foot is rendered inoperative even if the treadle is still held down. The latch as it is broken causes a solenoid 832 to be energized, and the latter operates a knife 834 to sever the strip at the hub breast line. At the end of its cutting operation the knife actuates a switch which causes the latch, 788, 796 to be reengaged when the treadle is released. The electrical circuit is described and illustrated. Specifications 749,892, 769,278, 798,686 and 942,946 also are referred to.