Conveying apparatus with endless chain means

Claim 2

Conveying apparatus comprising a frame; and at least one chain transmission means mounted on said frame; each of said chain transmission means including a pair of sprockets mounted at the opposite ends of said frame, one of said sprockets being a drive sprocket, the other being an idle sprocket, said drive sprocket and said idle sprocket have standard ASA teeth or DIN teeth, an endless chain passing around said sprockets, and at least one intermediate sprocket having involute teeth and disposed between said pair of sprockets for engagement with said endless chain on the tight side thereof; means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket, said apparatus further comprising means secured to said endless chain for carrying the load to be conveyed.

Claim 3

Conveying apparatus in accordance with claim 1, which further comprises means provided at the portion of engagement between said at least one intermediate drive sprocket and said endless chain for preventing any rising movement of said endless chain.

Claim 4

Conveying apparatus in accordance with claim 1 wherein said means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket comprise a pair of means, one driving said drive sprocket and the other driving said at least one intermediate drive sprocket.

Claim 5

Conveying apparatus in accordance with claim 1 wherein said means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket comprise a pair of motors electrically connected together so that motor torque variations due to load variations are detected and utilized to synchRonize the rotational speeds of the motors.

Claim 6

A moving path or an escalator for conveying passengers, comprising a frame; and at least one chain transmission means mounted on said frame; each of said chain transmission means including a pair of sprockets mounted at the opposite ends of said frame, one of said sprockets being a drive sprocket, the other being an idle sprocket, said drive sprocket and said idle sprocket have standard ASA teeth or DIN teeth, an endless chain passing around said sprockets, and at least one intermediate sprocket having involute teeth and disposed between said pair of sprockets so as to engage with said endless chain on the tight side thereof; means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket, and further comprising a plurality of step plates secured to said endless chain for carrying passengers; and one or two hand rails driven at a speed which is the same as the moving speed of said step plates.

Claim 7

A moving path or an escalator for conveying passengers, comprising a frame; and at least one chain transmission means mounted on said frame; each of said chain transmission means including a pair of sprockets mounted at the opposite ends of said frame, one of said sprockets being a drive sprocket, the other being an idle sprocket, said drive sprocket and said idle sprocket have standard ASA teeth or DIN teeth, an endless chain passing around said sprockets, and at least one intermediate sprocket having involute teeth and disposed between said pair of sprockets so as to engage with said endless chain on the tight side thereof; means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket, and further comprising a plurality of step plates secured to said endless chain for carrying passengers; and one or two hand rails driven at a speed which is the same as the moving speed of said step plates.

Claim 8

A moving path in accordance with claim 5, which further comprises means provided at the portion of engagement between said at least one intermediate drive sprocket and said endless chain for preventing any rising movement of said endless chain.

Claim 9

A moving path in accordance with claim 5 wherein said means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket comprise a pair of means, one driving said drive sprocket and the other driving said at least one intermediate drive sprocket.

Claim 10

A moving path in accordance with claim 5 wherein said means for synchronously driving said drive sprocket and said at least one intermediate drive sprocket comprise a pair of motors electrically connected together so that motor torque variations due to load variations are detected and utilized to synchronize the rotational speeds of the motors.

Claim 11

A moving path in accordance with claim 5 wherein said drive sprocket and said idle sprocket have standard ASA teeth or DIN teeth.