Zero Pressure Accumulation Conveyor

Zero Pressure Accumulation Conveyor is used for accumulating cartons on a conveyor.  This conveyor is photoeye controlled and air operated zones. No mechanical sensor rollers are used.

Specs and Features

Driving Belt - Black PVC 120 belt.
Bed - Roller bed width between frames, 15", 21", 27", 33", and 39".  7" x 1-1/2" x 12 gauge powder painted formed steel channel frame, bolted together with butt couplings and floor supports.  Frame sections are 10' 0" and 5' 0" long.
Tread Rollers - 1.9" diameter x 16 gauge galvanized steel rollers spaced on 3" or 6" centers.  Safety pop-out design prevents damage to product or harm to personnel if caught between belt and tread rollers.
Pressure Rollers- 1.9" diameter x 16 gauge galvanized steel rollers with 7/16" hex shaft spaced on 6" and 12" centers.  Raised by air to drive tread rollers, lowered when sensing device is activated.
Sensing Device - NEMA 1 photoelectric sensor in each zone detects presence of product and activates accumulation feature in the trailing zone if upstream zone is occupied.
Power Supply - 120 VAC power supply controls accumulation feature with 24 VDC output.
Power supply will control 50 accumulation zones.
Air Requirements - Operating pressure is 20-35 psi on main trunk line.
Accumulation Zones - 24", 30", or 36" long, air operated.  Conveyor frame lengths change with zone lengths.  NOTE:  Zone length must be evenly divisible by roller centers.
Filter/Regulator - Supplied loose for mounting to conveyor side frame, with 3/8" NPT ports. 
35 to 40 psi recommended operating pressure with free air consumption of .0062 cu. ft. per sensor operation.
Guard Rails - 1-1/2" x 1-1/2" x 12 gauge galvanized angle guard rails, both sides. 
NOTE:  Product contact with guard rails will affect product flow.
Tail Pulley - 4" diameter crowned with 1-3/16" shaft.
Drive Pulley - 8" diameter crowned and fully lagged with 1-7/16" diameter shaft. 
Located at in feed end of conveyor. 
Snub Roller - 2-1/2" diameter adjustable, located directly behind drive pulley. 
2" diameter at each end directly behind terminal pulleys
Return Idlers - 1.9" diameter adjustable on 10'0" centers.
Floor Supports - 31-1/2" to 45-1/2" adjustable from floor to top of rollers. 
One support supplied at each end of conveyor and at each bed joint.
Take-Up - Screw type take-up located at end of conveyor to maintain belt tension. 
12" of belt take-up provided.