An object of the present invention is to provide a chain that employs simple structures so as to establish contact surface pressures in accordance with various conditions of use, for the purpose of reducing frictional loss and preventing wear or damage to a chain guide member, as well as reducing order-related noise. The chain 100 is formed by inner links 101 and outer links 102 alternately and pivotably coupled together in a longitudinal direction of the chain. The plurality of inner plates 110 include an asymmetrical inner plate 110x having different edge shapes on upper and lower sides in a height direction of the chain.

A tray product pusher-puller device for a vending machine that allows a very high thrust to be achieved in order to move heavy products while at the same time ensuring that the storage surface that constitutes the unitary puller is easily cleanable and removable, in addition to providing the product with a stable base for storage, wherein the invention further relates to the vending machine comprising said pusher-puller device.

A tray product pusher-puller device for a vending machine that allows a very high thrust to be achieved in order to move heavy products while at the same time ensuring that the storage surface that constitutes the unitary puller is easily cleanable and removable, in addition to providing the product with a stable base for storage, wherein the invention further relates to the vending machine comprising said pusher-puller device.

A sprocket is provided for a carrier link chain system which has a chain and a carrier link. The sprocket contains a unitary body which has three shaped sections including a central shaped section and two outer shaped sections sandwiching the central shaped section. The central shaped section has teeth for moving the chain of the carrier link chain. The two outer shaped sections have protrusions extending from a circumference and defines a path through which sides of the carrier link traverse and preventing a side-to-side movement of the carrier link and the chain links. The sprocket prevents jamming issues currently seen when a carrier link twists and causes the chain to jump off of the sprocket or the carrier link gets jammed against other portions of the conveyor system.

A sprocket is provided for a carrier link chain system which has a chain and a carrier link. The sprocket contains a unitary body which has three shaped sections including a central shaped section and two outer shaped sections sandwiching the central shaped section. The central shaped section has teeth for moving the chain of the carrier link chain. The two outer shaped sections have protrusions extending from a circumference and defines a path through which sides of the carrier link traverse and preventing a side-to-side movement of the carrier link and the chain links. The sprocket prevents jamming issues currently seen when a carrier link twists and causes the chain to jump off of the sprocket or the carrier link gets jammed against other portions of the conveyor system.

A chain link is provided with a bushing construction where a chain pin is used for connecting a plurality of chain links, where the chain pin is inserted through the bushing along an axis, where the bushing in a cross section orthogonal to the axis has a circular cross section and where a resilient sleeve is arranged around the chain pin, where the chain pin has a flat face along the axis, and the resilient sleeve has a corresponding flat face in engagement with the flat face of the pin, and where the outer periphery of the resilient sleeve, when mounted on the chain pin, has a non-circular cross section, such that a free space is provided between the outer periphery of the sleeve and the inside of the bushing.