Patent GB-220605-A (GB)
Title: Improvements in or relating to machines for use in making boxes, crates or the like
IPC: B27M3/36
Filed: 1924-07-09
Abstract: 220,605. Wirebounds Patents Co., (Assignees of Thompson, 0. C.). Aug. 17, 1923, [Convention date]. Machines for making boxes or crates. - Relate to machines for making boxes or crates or box or crate blanks, of the kind having fastenersetting mechanism normally inactive but adapted to be thrown into operation to drive a fastener into moving work which is positioned and fed by endless conveyers moved continuously at an approximately uniform speed and comprises means for actuating mechanism for automatically throwing the fastener-setting mechanism into operation, such means being carried by one of said conveyers. In the illustrated machine described which is of the type described in Specification 179,516 and is for making wirebound box or crate blanks, the power is applied at a pulley 18, Figs. 2, 14, 16 and 18 which, to operate the machine, is clutched by moving a hand lever 42 to its hub 17 to which is keyed a spur-wheel 20, Fig. 9, which operates the endless conveyer through worms 23, 25, a spur-wheel 26 and a chain gearing 29. To operate the fastener-setting mechanism the hub 17 is further clutched at the required moment to a shaft 19 from which a carriage 50, Fig. 5, carrying the binderwire-applying mechanism, the wire severing mechanism, and the fastener making and applying mechanism, is reciprocated above the endless conveyer by means of cams 57 operating bellcrank levers 58 pivoted to the frame of the machine, and connected to stud shafts 60 on the carriage 50, the arrangement being such that the carriage moves forward at the same speed as the work. The, carriage 50 carries a row of stapleforming and driving units, one for each binding- wire to be stapled. Each unit comprises a fixed lower head 70, Fig. 23, and an upper head 71 reciprocated vertically in guides 73 by a pitman 74 from an eccentric 75 on the stapler shaft 19, and in each reciprocation cuts, forms and drives into place a staple. The wire for the staples is fed from reels 68. Fig. 1, to the lower heads 70 through feed rolls 76, 77, of which roll 76 is splined to a shaft 78 on the carriage 50 rotated intermittently from the shaft 19 by an eccentric 86, a pitman 85 and ratchet and pawl mechanism 84, and roll 77 is free. The wire passes from the feed rolls through a tube 87, through a horizontal cutting tube 88 with chamfer end and over a loop bar 89, Fig. 26, on a pivoted holder 90. It is there bent into shape over the loop bar and severed by a former 91 with a cutting edge and a chamfered corner and with a groove 93 to temporarily hold the severed wire, the wire being forced by the bars 89 into grooves 95 in a recess 94. The former 91 is pressed downwardly by a dog 96 pivoted to the upper head 71 such dog when the forming is completed being disengaged by means of a pin contacting a cam surface 100, the loop bar 89 being simultaneously disengaged by means of the elements 105, 107. The staple is then carried down to the surface of the work by a spring bar 102, after which it is driven in by a driver 108 on a back bar 106. The former is lifted off the work immediately the upward movement of head 71 begins by the engagement of the heel 109 of dog 96 with a recess 110 in the former. Mechanisms of the type described in Specification 161,962 may be secured to the lower head 70 to sever the binding wire. The clutches for connecting the endless conveyer mechanism and the stapling mechanism to the driven pulley 18 comprise rings 33, 112, Fig. 14, mounted loosely in recesses in the pulley 18 and the hub 17 respectively and carrying projections 31, 115 which when the rings are allowed to move with the members 18, 17 respectively, jam against inclined surfaces 32, 114 so that members 18, 17 and 17, 19 respectively are locked together. When, however, arms 36, 116, Fig. 15, engage projections 35, 115 on the rings these are held stationary and the members are declutched. The stapling mechanism is thrown into action at the desired moment by means of trip members 127 on blocks carried by the endless conveyer, such projections engaging a cam surface 128 adjustably mounted on a lever 124 and thereby also raising a hook 123 out of engagement with a block 125 on an arm 120 which then rocks a shaft 117 controlled by a spring 118 and so clutches members 17, 19 together. At the end of one rotation of shaft 19 a cam 121 rotates the arm 120 and causes it to engage projection 115 of ring 112 thereby declutching the members 17, 19. The rotation of the shaft 117 also operates to rotate a member 133, Fig. 6, through an arm 137 which loosens a band brake 130 at the beginning of a stapling operation and tightens it at the end. The stapling mechanism may be kept permanently out of action by means of a hand-operated lever 150, Fig. 11, which may be caused to move an arm 153 and thus rock a shaft 117 so as to keep members 17, 19 permanently declutched. An arrangement for causing continuous operation of the stapling- mechanism, so that the shaft 19 rotates continuously and causes a row of staples to be put in for each revolution, comprises means for holding the lever 124 permanently out of engagement with lever 120, such means comprising a hand lever 159, Fig. 10, having an arm 160 engaging an arm 161 on a collar 162 fast on a sleeve 158. carrying a pin 156 which by movement of handle. 159 engages the lower end of lever 124 and holds it out of engagement with an arm 120. To ensure that the machine is stopped only when the upper crossbar of the carriage 50 is in its uppermost position, shaft 37 which operates arm 36 to stop the machine is connected with staplershaft 19 by a rod 163, a roller 164 and a cam 165, the arrangement being such that the shaft 37 is only in position to declutch when the carriage 50 is at the top of its travel. To prevent positively the actuation of the staplers when the shaft 37 is rocked by hand to stop the machine, the rooking of this shaft is caused to engage a hook 145 with the lever 120 which thus positively prevents the clutching of the parts 17, 19 together. The trip members 127 for operating the staplers are, as shown in Figs. 30 and 31, carried by blocks secured to flanges 9, 10 of the conveyer chain. Some of such blocks are of the type 16 and act only to operate the stapling; others are of type 18 which in addition serve to position and feed the work. Mechanism for automatically recording the number of box blanks made comprises a counter 77 bolted to carriage 50 and an arm 172 fast on a roller 173 loosely mounted on shaft 78, such collar carrying an arm 174 which when lowered operates the counter 177 through links 175, 176. Arm 172 rides on the blank and when the end passes drops in the gap between the blanks and so operates the counter.