Patent GB-991723-A (GB)
Title: Gravity operated tipping wagons
Inventor: STAWORZYNSKI HENRY
IPC: B61D9/02
Filed: 1960-08-18
Abstract: 991,723. Tipping-wagons. HEAD WRIGHTSON & CO. Ltd. Aug. 15, 1961 [Aug. 18, 1960], No. 28701/60. Heading B7L. A gravity-operated tipping wagon, Figs. 1 and 2, which is able to tip to either side, comprises a body B supported on an undercarriage F by transversely-spaced pins 3, 3<1>, on a bracket 20 on the body, engaging pivot seats 2, 2<1> vertically slidable in a trunnion bracket 1 on the undercarriage against the urge of springs 5, the body being restrained from moving from the normal position, Fig. 1, by the engagement of seat plungers 22 with cams 7 on cam levers 28 secured to shafts 8 pivoted in the bracket 1, the cams being movable to release the seats through mechanism operable by levers 14, 14<1>. The body has side-wall doors 42, 42<1> carried by endplates 43 pivoted together at trunnions 45 carried by end walls 41 and the plates 43 are pivotally connected at 55 to telescopic struts each comprised of a push-rod 52 (52<1>) and atmospheric air cylinder 53 which latter is pivoted at 56 to a bracket 57 on the undercarriage F. The bracket 20 also carries pins 6, 6<1> adapted when the body is tilted to engage respectively recesses 26, 26<1> in the bracket 1. When the lever 14 is pulled to the left in Fig. 2 to operate the release mechanism for the righthand cam 7, the seat 2 is released and the equilibrium of the loaded body disturbed. Initially the body rotates clockwise about the pin 3<1> on seat 2<1> and the right-hand strut 52, 53 causes the right-hand door 42 to open. The load is then transferred to a central pivot pin 4 on the bracket 20, which pin is normally centrally disposed in a ring housing 24 on the bracket 1, the pin 4 engaging a right-hand seating surface in the housing. Finally the load is transferred to the pin 3 and rotation of the body continues until the pin 6 engages the recess 26. The body is then positively locked to the undercarriage by pushing the lever 14<1> back to the position shown in Fig. 1, and can only be released to return to its normal loading position under gravity, by again pulling the lever 14<1> to the position shown in Fig. 2. Referring to Fig. 8, the cam levers 28 are connected together by a tension spring 9 and each shaft 8 has secured thereto a cam operating lever 15 and is associated with a shaft 11 rotatable in brackets 11<1> on the undercarriage. The mechanisms for each side of the wagon are identical and referring only to the mechanism for controlling the tipping of the body to the right in Fig. 2, it will be seen that the operating lever 14<1> pivoted on the undercarriage on brackets 48 (only shown for the lever 14) and securable in the normal position by a hingedlever L, is connected by a link 13<1> to an arm 12<1> secured to the right-hand shaft 11. The latter has secured thereto a three-armed lever comprising a cam trip lever 10, an arm 23 with an adjustable stop 23<1> and a locking arm 30 to lock the cam-operating lever 15. Another arm 16 secured to the shaft 11 has a pin 33 engaging in a slot 32, 31 of a link 18 pivoted to a lever 38, in turn pivoted at 39 to a latch lever 19 connected by a screw adjustable hook 37 and spring 40 to the corresponding left-hand latch lever 19<1>. When the lever 14<1> is pulled to the left the shaft 11 is rotated to remove the locking arm 30 from the lever 15 which is then rotated by the cam lever 10 to rotate the right-hand cam 7 to release the seat 2 until the stop 23<1> engages the undercarriage. At the same time the arm 16 moves the link 18 via the engagement of the pin 33 in the slot portion 32 and thus through the lever 38 rotates the latch lever 19 anticlockwise until the link engages an adjustable stop of the undercarriage. The further rotation of the arm 16 then causes the pin 33 to move into the slot portion 31 of the link to provide a lost-motion connection between the lever 14<1> and the latch lever 19 whereby the latter rotates clockwise to its normal position under the action of the spring 40 in readiness to automatically latch a pin on the end of the bracket 20, the latch lever 19 having inclined surfaces 47 for this purpose. When the body is latched in the tipped position movement of the lever 14<1> to its normal position causes the pin 33 to re-enter the slot portion 32 and thus prevent the latch lever 19 from rotating anticlockwise. To release the tipped body the lever 14<1> is once more moved to the left to positively rotate the latch lever to its release position and to again set-up the lostmotion connection whereby the latch lever can return to its normal position and the cam lever 28 can return to its normal position and to be locked therein by the engagement of the arm 30 with the lever 15. In another embodiment described with reference to Figs. 9 to 11 (not shown), the body tips to one side only and each trunnion bracket has a single seat to engage a single pin on the body bracket. Moreover a second latch lever is interconnected with the latch lever already described which second latch lever engages a pin on the body bracket in the normal loading position of the body.