A conveyor system comprising a conveyor track, a conveyor movable along said track, a free track and a plurality of carriers movable along the free track. The conveyor has longitudinally spaced pusher and holdback dogs mounted thereon. Each carrier comprises spaced trolleys, and tie bar means interconnecting the trolleys. A trailing trolley has a pusher movably mounted thereon for movement into and out of the path of the pusher and holdback dogs. A bumper is mounted on the carrier at the front end thereof and is adapted to engage a preceding carrier or an obstacle. Means interconnect the bumper and the retractable pusher such that upon engagement of the bumper with the preceding carrier or obstacle the pusher is retracted out of the path of the pusher dog. The arrangement is such that the trolleys can pivot horizontally and vertically with respect to the means interconnecting the trolleys so that the system will function with horizontally and vertically curved tracks.
A waste water treatment apparatus of the type in which a carriage support rail extends across the top of the tank intermediate the side walls of the tank and a carriage is mounted on the rail and driven by a carriage drive including an endless chain which reciprocates the carriage along the rail, and a tank cleaning head is mounted on the carriage for movement along a path adjacent the bottom of the tank. The carriage support rail is in the form of a box-shaped beam having inwardly directed flanges at its underside and the chain is mounted inside the box-shaped beam to be protectively enclosed in the beam and the carriage has wheel mounting portions extending upwardly into the beam at opposite sides of the chain and carriage support wheels mounted on the wheel mounting portions inside the beam and in rolling engagement with the flanges on the beam to support the carriage for movement therealong. The chain has upper and lower runs extending lengthwise of the tank and carries a drive lug, and the carriage has an upper and a lower follower alternately engaged by the drive lug as it moves respectively along the upper and lower runs of the chain to reciprocate the carriage.
An accumulable conveyor, in particular a suspension conveyor (1), comprises an elongated drive member (13) in driving communication with a plurality of carrier members (4) horizontally spaced therefrom. An impact-pressure actuated separator is provided for temporarily disconnecting the drive connection and the carrier members during accumulation of the carrier members. The separator comprises a spreader (16) for increasing the horizontal distance between the carrier members (4) and the drive member (13) for disconnecting the drive connection.
A power and free conveyor system is provided which utilizes a difference in height between the wipe in power trolley and the wipe out power trolley, with or without a camming down of a retractable wide dog of the free trolley, to allow the wipe in power chain to wipe in over the retractable dog without any possibility of lateral interference. Thereafter the elevation of the wipe in power trolley and the wipe out power trolley are the same. Improved stop device operating to push down the retractable dog and therefore cause disengagement of the retractable dog from the power chain dog are also provided.
Conveyor system accessories are disclosed, which provide an inexpensive way to stage, stockpile and/or sort work pieces and provides easy entry to and exit from a main conveyor. In particular, a trolley or trolleys that carry work pieces ride on the conveyor rail above the chain or intermesh with the chain on the inside of the track. These accessories are used with single track continuous conveyor systems, which greatly enhances the productivity of the single track system by permitting work pieces to be taken off-line without taking the work piece off a load pendant.
Conveyor system accessories are disclosed, which provide an inexpensive way to stage, stockpile and/or sort work pieces and provides easy entry to and exit from a main conveyor. In particular, a trolley or trolleys that carry work pieces ride on the conveyor rail above the chain or intermesh with the chain on the inside of the track. These accessories are used with single track continuous conveyor systems, which greatly enhances the productivity of the single track system by permitting work pieces to be taken off-line without taking the work piece off a load pendant.
