Conveyors: power-driven – Conveyor section – Live roll
Patent
1991-09-03
1992-12-08
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Live roll
B65G 1306
Patent
active
051689790
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an accumulation conveyor comprising a number of conveyor sections with mutually drivingly connected transport rollers, and of the kind presented in the introductory part of claim 1.
BACKGROUND OF THE INVENTION
A known accumulation conveyor of this kind has a very complicated drive system wherein, for each conveyor section with corresponding drive shaft, a clutch is placed at a distance below the row of transport rollers, and wherein the drive shafts of each section are mutually connected by a separate system of drive chains, which drive chain system is placed abreast of the clutches but at the opposite side of the conveyor. Furthermore each clutch is in direct driving engagement with two transport rollers.
SUMMARY OF THE INVENTION
The purpose of the invention is to provide an improved accumulation conveyor of the kind mentioned, and which by simple provisions may exhibit a considerably simplified and more reliable drive system.
The accumulation conveyor according to the invention is distinctive in that the clutch is constituted by a clutch hub rotatably journaled on a carrier axle at an end part of the transport roller and carrying the said drive wheel, the clutch hub being surrounded by a connector sleeve which is rotatable in relation to the clutch hub and mounted inside the end part of the transport roller, outside of which the connector sleeve is rotatably connected to a ring body with radially outwardly protruding control cams and irrotatably connected to a gear wheel intended for driving engagement with a neighboring transport roller, and in that between the clutch hub and the connector sleeve a clutching member is provided which is arranged to release the clutch hub when the ring body is prevented from rotating by an outer engagement between a controlling pawl and one of the said control cams. Thus by of simple provisions a significant general mechanical simplification of accumulation conveyors can be attained which may furthermore have a significantly improved reliability in relation to the mentioned previously known conveyor. The compact construction involves a very significant overall reduction in weight which, together with the compact configuration, results in a significant reduction of the costs of shipping the conveyor.
With a view towards including a very simple and reliable clutch in the individual conveyor sections of the accumulation conveyor according to the invention, the clutching member is constituted by a coil spring with radially protruding ends, which coil spring is dimensioned in the fashion of a spring clamping band in such a way that in a free condition, the coil spring can clutch and engage the clutch hub, and by shifting the protruding ends to wards each other along the circumference of the coil spring, the coil spring can be released from the the clutch hub, as a short protruding end of the coil spring engages a radial hole in that part of the connector sleeve which is mounted inside the transport roller while a longer protruding end part of the coil spring engages the ring body via a bent slot in the wall of the connector sleeve outside the end part of the transport roller.
The accumulation conveyor according to the invention is preferably arranged such that the connection between the detecting member and the clutch of a neighbouring section, preferably, an upstream conveyor section, is preferably constituted by a stiff linking rod, and the said detecting member is constituted by a pivotably journaled sensing roller which is arranged, preferably, downstream of the transport roller wherein the clutch is arranged, width the sensing roller being mounted in a known manner between arm parts of a pivotably journaled arm system which at one side of the conveyor section has a sideways protruding control pin engaging a cut-out of a pivotably journaled pawl arm which opposite of the cutout is provided with the said controlling pawl, and which is arranged to be swung between a position wherein the controlling pawl extends i
REFERENCES:
patent: 3537568 (1970-11-01), Leach
patent: 4063636 (1977-12-01), vom Stein
patent: 4362238 (1982-12-01), Rivette
patent: 4562920 (1986-01-01), Jaffre
patent: 4752000 (1988-06-01), Hodgin
patent: 4781283 (1988-11-01), Bentley et al.
patent: 4798282 (1989-01-01), Sperduti et al.
Univeyor A/S
Valenza Joseph E.
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