Patent GB-463135-A (GB)
Title: Improvements relating to a method and mechanism for bending barrel staves and making barrels therefrom
IPC: B27H5/10
Filed: 1935-08-21
Abstract: 463,135. Making barrels or barrel staves. ANDERSON, W. R. Aug. 21, 1935, No. 23504. Convention date, Aug. 22, 1934. [Classes 145 (i) and 145 (ii)] [Also in Group XVII] A machine for producing from flat staves either a completed barrel or an open - ended un - hooped barrel body, or a body on which any or all of the operations of crozing, end trimming, planing, heading, and hooping have been performed, consists of a ram 21b, Figs. 1 and 13, driven through any suitable mechanism by a belt 22, Fig. 2, connecting a pulley 23 with a pulley 24 on a shaft 25 driven through a pulley 26 and a belt 27 from a pulley 28 on the armature shaft of a motor 29, pulley 28 serving also to couple to the motor a main driving shaft 30 carrying driving pulleys 32, 33. Stave bending. The ram 21b carries a U-shaped bracket 55 having sliding stave guides 58 in the sides beneath which a stave may be slid, and carries also a leaf spring 66 whose ends can slide in the bracket 55 and on which are mounted pressure members 64, the lower ends of which are curved to conform to the required curvature of a stave, outer pressure members 62 with similarly curved ends being pivoted at 63 to the bracket. When the ram 21b descends the stave is thrust down so that its ends engage frictionally between two rings 61 held at a fixed distance apart, the spring 66 flexing against the resistance of an adjustable ring 127 so that pressure is applied all along the stave to bend it to the required configuration. The expansible ring 127, Fig. 6, is carried on a shaft 123 supported in apertures in two tool blocks 116, and having a guide block 124 slotted at 125 to take shafts 126 of ring sections 127, which are expanded by rotating the ring relative to its shaft so that a cam 129 moves the shafts 126. Rotating the barrel body. Each ring 61 is carried on a gear 71, Fig. 3, mounted on a hollow shaft 72 rotatably mounted within a hollow shaft 38 carried by standards 37 on a table 36 adjustable towards and from the stave by means of a shaft 90 driven by gears 92, 93 from a shaft 42. Each gear 71 meshes with a gear 73, Figs. 3 and 4, on a jack-shaft 74 mounted on the standard 21a of the press and capable of being slowly rotated by a worm gear 76 on an inclined shaft 77 carrying a bevel 78 meshing with a bevel 79 on the end 25a of the shaft 25 on which pulley 26 is mounted. One face of the worm gear 75 has clutch teeth 80, Fig. 2, which can engage a clutch sleeve 81 on jack-shaft 74, the clutch 81 being manually actuated by a handle 82, Fig. 1. Means are also provided for automatically engaging and disengaging the clutch sleeve 81 when the ram 21b ascends and descends, such means consisting of an arm 83 on the members 81 which is pivoted at 84 to the machine frame and carries a link 85 pivoted to a lever 86 connected by a rod 87 to the ram 21b. By this arrangement, the gears 71 carrying the rings 61 which hold the staves between them are intermittently rotated so that successive staves may be placed beneath the ram. Engaging truss hoops. When the staves form a complete body truss hoops 60 are forced on the ends by means of spiders 94, the arms of which contact the hoops, and which are moved by the engagement with the body 94a of each spider of a thread 39 on a tubular shaft 38, one of which is mounted on each side of the machine and the threads of which are opposite to one another. Shaft 38 is actuated by gears 40, 41 from countershaft 42 which carries clutch pulleys 43, 44 driven respectively by a belt 45 and pulley 32 and a belt 46 and pulley 33 from the main shaft 30. A clutch 47 is slidable by a lever arm 48 on shaft 42 to engage either of pulleys 43, 44, the lever arm 48 being actuated through links 49, 50, 51 from a hand lever 52. After engagement of truss hoops 60 the spiders are retracted and engaged with truss hoops 59 which are then forced on to the body. During the engagement of the truss hoops the ring 127 is expanded to true up the barrel. The body thus formed may then, if desired, be removed by retracting the tables and allowing the body to rest on a cradle 150, Fig. 1, by slides 151a in which are moved upwards by a foot pedal 152 and returned by the weight of the barrel so that this rests on slides 151 from which it can be rolled bv hand. Planing. Truss hoops 59 are withdrawn and the barrel rotated against a plane 161, Fig. 18, by moving lever 136, Figs. 1 and 4, to the left to engage teeth 131a of a clutch 131 with teeth 130a after which a handle 52 is actuated to throw the upper clutch pulley 43 or 44 into rotation, this rotating of shaft 42 not driving gears 40 or 92 since clutch 138 is then in neutral position. The engagement of clutch teeth 130a, 131a brings into action a single pinion 130 on shaft 42 which rotates gear 71, the other gear 71 being synchronized by shaft 74 and pinions 73. Crozing. The barrel is released by retracting the tables 36 and the expansion ring 127 removed manually while the barrel is on the cradle. The barrel is then replaced and the tables advanced to bring into position crozing knives 116 carried on tubular shafts 100 on the outer end of which is rotatably mounted a clutch pulley 101, Figs. 3 and 9, which can be engaged frictionally by arms 102 expanded by a member 103 slidable on shaft 100 and manually actuated by a hand lever 104, Fig. 1. Pulley 101 is driven by a belt 109, a pulley 110 on a countershaft 111 which also carries a pulley 113 which is driven by a belt 114 and pulley 115 on main shaft 30. The crozing and end trimming knives 117 are adjusted by bevels 120, 121 actuated by a shaft 118 rotatable within hollow shaft 100 and having a feeding wheel 119. Affixing heads and hooping. Truss hoops 60 are removed to permit the ends of the body to open and the heads are manually inserted, and forced home by moving the tables. Galvanized hoops are then placed on the ends and driven home by forcing the truss hoops 60 against them. Truss hoops 59 are then retracted and further galvanized hoops similarly affixed.