Abstract: An accumulation conveyor system for supporting and moving a plurality of objects. The conveyor system is divided into a plurality of zones wherein each zone includes a top and bottom conveying surface and wherein a space is defined between the top and bottom surfaces. Each zone also includes its own motor positioned external to the space between the conveying surfaces and coupled to the conveying surfaces via a non-slip connection. A control system is connected to the motor and controls the power to the motor so that the conveying surfaces in each zone can be moved independently. Whenever a sensor detects an empty downstream zone, it signals the control system of the upstream zone to power the motor and move the object to fill the empty zone. The control system may also be configured to allow a soft start wherein motor speed is increased gradually.

Abstract: An internally powered conveyor roller, of the type used for driving a conveyor one direction, and for preventing movement in opposite direction and having a drive roller for driving the conveyor medium, an internal drive motor for driving the roller, a one-way rotation device permitting rotation of the roller in one direction, and for preventing rotation in the opposite direction, and the one way rotation means being moveable between engaged and disengaged positions, and when in the disengaged position, being inoperative to prevent reverse rotation of the roller.

Abstract: A motor-installed roller (3) has a roller body (6) with ends closed with fixtures (7), and apertures (30,31) are formed in the roller body and fixtures, respectively. A recess (32) also formed in each fixture (7) extends in axial direction of this fixture so as to communicate with the aperture (31). A hollow pin (9) as the fastener has a solid basal portion (36) and a collapsible foot (35). This foot is deformed by an external force applied to the solid portion in its axial direction, so as to extend along the inner surface of the recess (32) such that the hollow pin (9) is locked in place not to slip off even if subjected to vibration. The solid portion (36) of this pin prevents the roller body (6) from moving relative to the fixture (7), or relative to any closures, bearings or the like easily attached to the roller.

Abstract: Apparatus for detachable securement of a motor to an attachment member of a conveyor, includes a pair of connector elements, with one connector element fastened to the motor and the other connector element fastened to the attachment member. The connector elements define a bayonet coupling which includes a bayonet element projecting out of one of the connector elements for reception in an opening of the other one of the connector elements. The bayonet coupling is constructed with an inclined surface to effect a movement of the connector elements toward one another in axial direction as the connector elements are turned and/or shift relative to one another. A securing element is provided for safeguarding the connector elements against detachment, when the connector elements are secured to one another.

Abstract: A motor-installed roller (3) has a roller body (6) and a prime mover unit (35) installed in this body and composed of a motor (33) and a reducer (34). The roller body (6) has opposite ends closed with closures (7) serving as closures and having cavities (22) formed in it. An external force is applied to an area of outer periphery of the roller body (6), the area corresponding to and facing each cavity (22) so as to plastically deform portions of the roller body and the closure (7). A punched hook engagement (65) formed in this manner serves to easy consolidation of the closure (7) such as the closure, a bearing or the like and the roller body (6) into the motor-installed roller (3), in which they are protected from moving relative to each other in tangential and axial directions, also inhibiting the closure (7) from slip-ping off even if subjected to vibration.

Abstract: A motor-installed roller (3) has a roller body (6) with ends closed with fixtures (7), and apertures (30,31) are formed in the roller body and fixtures, respectively. A recess (32) also formed in each fixture (7) extends in axial direction of this fixture so as to communicate with the aperture (31). A hollow pin (9) as the fastener has a solid basal portion (36) and a collapsible foot (35). This foot is deformed by an external force applied to the solid portion in its axial direction, so as to extend along the inner surface of the recess (32) such that the hollow pin (9) is locked in place not to slip off even if subjected to vibration. The solid portion (36) of this pin prevents the roller body (6) from moving relative to the fixture (7), or relative to any closures, bearings or the like easily attached to the roller.

Abstract: A shaft 6 of a motorized roller 1 is fastened to a side wall 17a of a frame 17 through a plate 19. An engaging portion 14 of the shaft 6 is fitted into a hole 21 of the plate 19 so as to prevent rotation of the shaft 6 relative to the plate 19. As a nut 22 tightened on a threaded portion 15 of the shaft 6 presses and urges the plate 19 against the side wall 17a, teeth 20 formed at the corners of the plate 19 bite into the surface of the side wall 17a and prevents rotation of the plate 19 relative to the side wall. Thus the shafts 6, 7 are fastened unrotatably relative to the side wall 17a.

Abstract: A conveyor roller drive device is provided to mechanically prevent conveyed goods from falling down on a conveyor system. The conveyor roller drive device includes a power generator for generating rotational power and a coupling portion which is coupled to a conveyor roller. A traction roller transmission mechanism is disposed in the rotational power transmission path between the power generator and the coupling portion. The traction roller transmission mechanism includes a sun roller, planetary rollers disposed on the periphery of the sun roller to roll in contact with the sun roller, a ring roller for allowing the planetary rollers to roll in contact with the inner periphery surface of the ring roller, and a carrier being in phase with the revolution component of the planetary rollers.

Abstract: A brushless d.c. motor is integrated with a conveyor roller (14) by placing a plurality of stator coils (15) on a stationary shaft (18) and securing a rotor (10) with segments (12) of permanent magnetic material to the inside of the conveyor roller (14). In one embodiment the rotor (10) is directly secured to the roller while in a second embodiment, the rotor (10) is disposed inside of a cylindrical metal housing (40) that is press fit inside of the roller. Commutation is provided by an external motor controller (54) which is connected by conductors (37) through a passageway (36) in the shaft (18) to a circuit board (20), where sensors (23) are mounted to sense rotor position for purposes of commutation of the stator coils (15).

Abstract: A roller conveyor has three-phase synchronous motors and feed rollers. The three-phase synchronous motors are operationally coupled to the respective feed rollers. The three-phase synchronous motors are driven by a three-phase AC voltage supplied from a three-phase AC power supply and the three-phase synchronous motors output a torque. Each feed roller is caused to roll to convey a work by the torque output from the corresponding three-phase synchronous motor. This structure provides an inexpensive roller conveyor which is easy to maintain.

Abstract: An internally powered conveyor roller, of the type used for driving a conveyor one direction, and for preventing movement in opposite direction and having a drive roller for driving the conveyor medium, an internal drive motor for driving the roller, a one-way rotation device permitting rotation of the roller in one direction, and for preventing rotation in the opposite direction, and the one way rotation means being moveable between engaged and disengaged positions, and when in the disengaged position, being inoperative to prevent reverse rotation of the roller.

Abstract: The conveyor apparatus disclosed herein is generally formed of a first rail and a second rail, each rail having a plurality of rollers. A portion of the rollers are desirably drive rollers, receiving power from an integral motor assembly. The motor generally comprises a stator that is coupled to the rail and an outer roller assembly rotatably coupled to the rail. The roller assembly includes an outer circumferential magnetized portion positioned in surrounding engagement to the motor stator and functions both as the motor rotor and the conveying surface of the roller. Non-slip roller covering material may be attached to the exterior of the roller assembly. A circuit board having logic controls is preferably in communication with at least one sensor and the motor rotor to regulate rotation of the motor rotor during use of the conveyor.

Abstract: By housing a driver circuit board in a motorized roller having a built-in electric motor, the troublesome external wiring can be dispensed with, thereby facilitating the mounting of the roller on other apparatus. The heat generating inside the roller from a driver circuit board in the roller is dissipated by a heat releaser, thus protecting the devices from damage and avoiding failure of control.

Abstract: A dead shaft or motorized conveyor pulley in which a drum is mounted for rotation about an axis of rotation on a shaft mounted against rotation, has the shaft mounted in a pivot sphere. The sphere is mounted in a complementarily socketed block against rotation around the axis of rotation but to permit angular movement in response to misalignment of the shaft from one of the drum to the other end during installation.

Abstract: A conveyor roller assembly comprising a supporting bracket through which the roller assembly can be fixed in use, a hollow, generally cylindrical roller shell supported for rotation about its longitudinal axis on the bracket, an electrical generator housed within the roller shell and driven thereby by rotation of the shell to produce an electrical output, a brake within the roller shell and operable to brake rotation of the shell relative to the bracket, a speed sensor within the shell for sensing the speed of rotation of the shell relative to the bracket, and, an actuator powered by the electrical output of the generator when the speed sensor detects that the speed of rotation of the shell relative to the bracket exceeds a predetermined value, to effect operation of the brake to brake rotation of the shell.

Abstract: The aim of the invention is to provide a simple, safe to handle fixing device for a par that can be inserted between adjacent supports, especially centrally. Locating holes that are aligned approximately flush with each other, for holding elements of the part are provided in the adjacent supports. The holding elements are configured in the form of pegs mounted in the part. The pegs are provided with a screw thread at their second ends and each engage in a corresponding screw of sliding pieces that can slide in the part. The sliding pieces can be slid and stopped in a plane defined by the longitudinal axes of the pegs. The part has at least one pair of pegs on opposite outer surfaces that are flush with each other through the part.

Abstract: The present invention relates to a powered roller bed with multiple rows of rollers, wherein two or more self-powered rollers are provided on each row along the bed. The rollers are preferably powered by electromagnetic motors having a stationary shaft and a rotating cylinder thereon so that each one can be independently controlled and operated. The present invention preferably provides a means of installing and removing each roller by hand without the aid of tools.

Abstract: In a motorized conveyor pulley of the type comprising a cylindrical pulley drum with axially opposite end plates enclosing an electric motor and drive transmission, the pair of end plates of the pulley are constructed with an increased axial thickness compared to prior art end plates and are supported on a pair of shaft ends by pairs of bearings and are sealed by a pair of lubricant seals between each pair of bearings. The enlarged end plates and the pairs of bearings resist bending loads exerted on the conveyor pulley by the conveyor belt and thereby reduce loading stresses on the motor and drive transmission contained in the pulley permitting more economical manufacture of the motor and drive transmission.

Abstract: A conveyor system is divided into a plurality of zones each including a plurality of rollers arranged in parallel with each other. The zones are arranged successively for conveying articles from the upstream end to the downstream end of the conveyor system. One of the rollers in each zone is a drive roller. Article detectors are disposed in association with the respective zones and develop an article-representative signal when they detect an article in the associated zones. A current detector detects the sum of currents flowing through motors driving the drive rollers and develops a excessive-current representative signal when the sum current exceeds a reference current value. A current suppressing circuit connected to the article detectors and to the current detector causes limited currents to be supplied only to motors including the motors in the zones where the first and second in order ones of articles being conveyed are present.

Abstract: By housing a driver circuit board in a motorized roller having a built-in electric motor, the troublesome external wiring can be dispensed with, thereby facilitating the mounting of the roller on other apparatus. The heat generating inside the roller from a driver circuit board in the roller is dissipated by a heat releaser, thus protecting the devices from damage and avoiding failure of control.

Abstract: A rotation detection device is provided in a motor roller of a conveying apparatus to detect changes in the rotation speed of the motor roller. When an object is moved from an upstream location of a conveyance path to the motor roller having the rotation detection device, the rotation detection device detects the presence of the object by measuring the slight variation in rotation speed of the motor roller. A control unit is provided to monitor the output signals from a plurality of rotation detection devices, arranged along the conveyance path. The control device independently adjusts the conveyance speeds of a plurality of independent conveyance portions along the conveyance path based upon these output signals. This system allows conveyance of a plurality of objects along the conveyance while avoiding one object from running into another object due to, for example, a delay at a particular point along the conveyance path.

Abstract: A freight loading system is provided comprising at least one drive roller unit for conveying objects, in particular containers, pallets or the like, on the freight deck of an aircraft. The drive roller unit comprises at least one drive roller, which is in operative connection with a drive motor that can be controlled by way of an operator's console and which can be brought into engagement with an undersurface of an object to be conveyed. At least one sensing means comprising a measurement roller is provided and which likewise can be brought into connection with the undersurface of the object.

Abstract: In a roller conveyor system for carrying out zone control, a conveyed article can be stopped in an approximately constant position without varying the position where the article is stopped in a desired control zone even if the weight of the article varies. In order to syop the article in a predetermined control zone, such stop control is carried out that a motor is decelerated and stopped in a plurality of braking systems depending on the change in the pulse width of a rotational pulse signal to stop the article with high precision in a predetermined stop position.

Abstract: A press roll device for applying pressure on a piece of wood moving along a path. The device has a frame mounted in proximity to the path of the piece of wood and a lower and an upper arm both pivotally connected to the frame. A roller is rotationally mounted on the end of the lower arm and a jack is resiliently connected to the corresponding end of the upper arm. A bag of compressed air is disposed between the ends of the lower and upper arm, resiliently separating the roller and the jack. In this manner, the bag of compressed air absorbs the vibration of the roller caused by unevenness in the piece of wood, at least partially.

Abstract: A roller conveyor for conveying an elongated article includes a row of drive roller units arranged in a conveyance direction of the elongated articles at intervals smaller than the length of a roller engagement portion of the elongated article. The drive roller units each includes a drive roller for frictionally driving the elongated article in the longitudinal direction thereof while engaging the roller engagement portion of the elongated article, a floating support frame rotatably supporting thereon the drive roller and being attached to a fixed member of the roller conveyor so as to enable an outer peripheral surface of the drive roller to move toward and away from the roller engagement portion of the elongated article, and an urging member for urging the floating support frame in a direction to force the outer peripheral surface of the drive roller against the roller engagement portion of the elongated article.

Abstract: A drive roller has a brushless D.C. motor with a stator or armature mounted on a fixed shaft and directly driving a 16 pole permanent magnet rotor mounted inside a roller tube. A motor controller drive supplies three-phase power to a Y-connected three phase winding having three groups of two coils, forming twelve electromagnets which drive the rotor. The modular motor is readily built in one inch increments to supply one lb-in of torque for each increment. The controller operates at a relatively low frequency of 15-75 Hz. Hall effect sensors provide feedback on motor speed and position. The armature laminations are relatively thick because of the relatively low power necessary to drive the motor and the resultant relatively low eddy currents present in the motor core. A 4.0 lb-in torque motor with a rotor and stator length of four inches will draw approximately 0.8 amps consuming about 15 Watts.

Abstract: The drive roller of this invention utilizes a brushless D.C. motor which has a stator or armature mounted on a fixed shaft which directly drives a permanent magnet rotor mounted inside a roller tube. A variable frequency drive supplies three-phase power to a Y-connected three phase winding which is composed of three groups of two coils. Thus twelve electromagnets are formed which drive the permanent magnet rotor which has sixteen poles. The brushless D.C. motor is of a modular design and can be easily built in one inch length increments to supply one lb-in of torque for each one-inch increment. The variable frequency controller operates at a relatively low frequency of 15-75 Hz. Hall effect sensors are used to provide feedback on motor speed and position. The armature laminations making up the brushless D.C. motor core are also relatively thick because of the relatively low power necessary to drive the motor and the resultant relatively low eddy currents present in the motor core. For a motor with a 4.

Abstract: The present invention relates to a drive roller for endless-belt or chain-belt conveyors. It is powered by a hydraulic motor that is wholly enclosed within the roller. One shaft of the roller is stationary and is ported to permit passage of hydraulic fluid to and from the motor. The stationary shaft terminates in a flange that is bolted to the hydraulic motor end plate to provide simple yet robust support for the motor. The fluid ports are within this flange and are O-ring sealed. The second roller shaft rotates with the outer drum. This novel and simple design requires only one internal bearing thus greatly reducing the complexity and cost compared to prior art drive rollers. The hydraulic roller is readily mounted on existing conveyor structures.

Abstract: An installation apparatus for a powered roller drive unit (11) to propel and convey objects, is provided wherein the roller drive unit is fixed to the floor (13) of an installation channel (12) of the apparatus. The installation apparatus includes a trough (14) attached to the floor (13), preferably in the region of and beneath the roller drive unit (11) for draining water.

Abstract: A zoned transport conveyor includes a drive roller and a series of driven rollers for each zone. A motor is interconnected with the drive roller for imparting rotation to the drive roller, which in turn is drivingly engaged with the driven rollers such as through a series of belts. Introduction of a load onto the zone results in rotation of an upstream one of the driven rollers, which is transferred through the drive arrangement to the drive roller. Rotation of the drive roller results in rotation of an output member associated with the motor, which is detected by a series of sensors associated with the motor and which provides and input to a motor control circuit. The motor control circuit includes a processor for controlling operation of the motor, and the processor functions to initiate operation of the motor when inertial rotation of the motor output member is detected.

Abstract: A roller drive unit with a roller, a motor to drive the roller, a drive shaft coupled to the motor, and a gear system to couple the roller to the drive shaft. The gear system has a drive gear coupled in a non-rotating manner to the drive shaft, and a driven gear coupled to the roller on the one hand and to the drive gear on the other. The drive unit also includes a support element on which the roller is supported in a rotary manner and which is in turn rotatable about the axis of the roller, a device for limiting the angular range about which the support element rotates, and a supporting device for receiving the force acting by means of a load on the roller. The support element carries at least one eccentric cam supported on a cam support.

Abstract: A roll conveyor includes a pair of parallel, spaced apart stationary beams and a plurality of elongate cylindrical rollers supported in parallel, side-by-side spaced apart relation for rotation relative to the beams. The rollers are supported and driven individually, each rotated with respect to a pair of non-rotating, coaxial and axially spaced apart first and second shafts. The first shaft is stationary and supports a motorized pulley. A cylindrical housing of the pulley is mounted concentrically and rotatably relative to the stationary shaft. An end plate integral with the housing is shaped to provide an interference fit with a flange secured to one end of the roller, to coaxially align the roller and motorized pulley. The opposite end of the roller includes an idler end region containing an axially inward portion of the second shaft. An axially outward portion of the second shaft is mounted slidably in the axial direction but prevented from rotating.

Abstract: A drive roller for a conveyor is rotated by a brushless D.C. motor without any intervening gear reducer. The drove roller has a laminated metal stator with at least three windings external to the stator core. The stator is fixed to a rigid axially extending shaft which supports a roller tube and a permanent magnet rotor on bearings. The rotor is fixed to the roller tube and closely spaced from the stator. A variable frequency power supply controls the induced magnetic field in the stator to control the rotational speed of the drive roller.

Abstract: A roller conveyor has drive rollers individually connected to a stepping motor and idler rollers arranged longitudinally in two rows. The conveyor is divided longitudinally into a plurality of sections, each section being provided with a sensor and one of control cards that are sequentially connected and can exchange signals such that objects can be transported longitudinally on these rollers from one section to the next without colliding each other. Each drive roller has a wear-resistant lining around the drive shaft of the associated stepping motor such that the drive rollers can start and stop rotation gradually even if the associated motors are started or stopped abruptly.

Abstract: Motorised head pulley comprising a rotating drum, which is driven by a permanently mounted hydraulic motor situated in the pulley. Between the motor and the pulley, a reduction gear is inserted. The motor and the reduction gear comprise moving parts, which are designed for operation in contact with a water-based, lubricant-free pressure fluid. The motorised head pulley can by this be used without having to pay attention to the risk of pollution from the hydraulic medium. The motorised head pulley is especially appropriate to drive conveyors in food processing production.

Abstract: A scanner base for an optical scanner, including two end plates, a contact image sensor connected between the end plates, a roller mounted between holes on the end plates and disposed in contact with the contact image sensor, and a motor drive mounted on one end plate and controlled to turn the roller, causing the roller to carry the document to be scanned over the contact image sensor for scanning.

Abstract: Disclosed is a conveyer device using a plurality of motor-incorporated rollers. The conveyer device related to the invention provides advantageous structure in that motor-incorporated rollers are highly interchangeable and practically usable with very high supply voltages. Each pair of the motor-incorporated rollers for composing the conveyer device are connected in series to each other. Each motor built in the motor-incorporated roller is based on star connection as per 200 VAC of rated voltage. Interphase impedance of each motor built in the roller is 700 .OMEGA. against supply power. The conveyer device itself uses 400 VAC of power source.

Abstract: Conveyors containing powered rollers arranged in zones, each of which zones may be independently controlled. Such conveyors are particularly useful in transitioning object flow from a constant speed conveyor such as in a plant or warehouse, to manual offloading operations which tends to be more intermittent in nature. The independently controlled zones automatically activate and deactivate in a manner that allows objects to accumulate in a compact fashion on the conveyor when offloading operations stop, but once again to space themselves apart from one another as offloading operations resume and flow once again reaches steady state. This increased spacing during steady state flow allows the conveyor to begin absorbing objects in the accumulation mode if and when offloading stops again. Among other beneficial effects is an ergonomic one: Workers are freed from the stress of knowing that objects flowing on the conveyor will simply be propelled off the end if they take a momentary break.

Abstract: A motorized conveyor roller is provided which includes a mechanism for rotatably mounting a roller tube in a conveyor frame, the roller tube having a length, an inner diameter and a hollow interior. The roller tube has disposed within the hollow interior, a motor and a gear reducer also mounted inside the roller tube operatively connected to the motor. The gear reducer includes an output and a drive member being driven by the gear reducer output to drive said roller. A lubricant is contained within the hollow interior for lubricating and cooling the motor, the gear reducer, the gear reducer output, and the inner diameter of the roller tube. The roller tube has a device for ensuring that the lubricant is uniformily distributed about the inner diameter and length of the roller tube proximate portions of the inner diameter which do not contain the motor, the gear reducer, or the gear reducer output.

Abstract: A drive roller unit for driving an article on a conveyor track includes a drive roller which can be driven in rotation by an electric motor. The drive roller is in the form of a hollow circular cylinder and the motor is accommodated in the interior thereof. The drive roller is non-rotatably connected to the stator of the motor in concentric relationship with the axis of rotation of the rotor of the motor. A runner wheel disposed at least at one axial end of the rotor shaft is in engagement with a guide track mechanism which is fixedly connected to the base of the unit and which leads upwardly with respect to the base, the runner wheel rolling along the guide track mechanism to raise the drive roller into an upper operative position to engage an article to be driven thereby. The guide track mechanism may be in the form of a guide wheel co-operable with the runner wheel.

Abstract: A cargo drive unit which, as part of an array of several such units, it disposed in the hold of a vehicle to permit cargo to be moved within the hold. The drive unit derives power from an electric motor to first erect a drive a roller into contact with a load and then to move the load. A hysteresis coupling is disposed between the motor and the roller and functions to limit the force of the roller against the load to be driven by adjusting the excitation current thereto. The hysteresis coupling allows the roller to retract when the current to the coupling is removed and limits shock loading to drive gearing and the motor when excessive loads are applied to the roller.

Abstract: A roll feed device includes a rotatable main roll, and a rotatable sub-roll. The main roll includes an annular stator, and an annular rotor rotatably mounted around the annular stator. The annular stator and the annular rotor cooperate with each other to provide a direct drive motor. The sub-roll includes a rotatable annular roll disposed in opposed relation to the annular rotor of the main roll. A sheet-like material is supplied between the annular rotor and the annular roll to be fed.

Abstract: A drive roller unit for driving an article on a conveyor track has a mounting frame structure of which one end is mounted to a base pivotably about an axis extending transversely to the direction of movement of the article, and a cam control unit for raising the free end of the mounting frame structure. A drive roller is mounted rotatably in the mounting frame structure to engage with an article disposed thereabove, only when the mounting frame structure is in a raised position. An electric motor drives a main transmission arrangement having first and second outputs of which one drives the cam control unit and the other drives the drive roller by way of a further transmission arrangement. Of the two outputs it is only ever that one which is subjected to a lower braking moment that rotates so that when the drive roller unit is initially switched on the mounting frame structure is first raised by the cam control unit and then the drive roller is driven in rotation.

Abstract: A drive roller unit for driving an article on a conveyor track includes a drive roller which can be driven in rotation by an electric motor. The drive roller is in the form of a hollow circular cylinder and the motor is accommodated in the interior thereof. The drive roller is non-rotatably connected to the stator of the motor in concentric relationship with the axis of rotation of the rotor of the motor. A runner wheel disposed at least at one axial end of the rotor shaft is in engagement with a guide track mechanism which is fixedly connected to the base of the unit and which leads upwardly with respect to the base, the runner wheel rolling along the guide track mechanism to raise the drive roller into an upper operative position to engage an article to be driven thereby. The guide track mechanism may be in the form of a guide wheel co-operable with the runner wheel.

Abstract: A motorized conveyor roller is mounted in a conveyor frame to support and propel articles from one end of the conveyor path towards the opposite end. The conveyor roller includes a roller tube rotatably mounted in the conveyor frame and a drive means contained inside the roller tube for driving the roller tube. The drive means includes a motor; a gear reducer assembly operatively connected to the motor; and a drive member connected to the output shaft of the speed reducer for engaging and rotating the roller tube. The drive member preferably includes an elastomeric means for frictionally engaging the inner wall of the roller tube, and a clutch means adapted to slip at a predetermined torque to protect the motor and gear reducer assembly from torque overload.

Abstract: A roller drive unit includes a frame, a drive shaft rotatably mounted in the frame, and a gear mounted on the drive shaft for engaging a drive motor. A pivot support is mounted on the drive shaft and is pivotable from lower rest position to an upper working position. A drive roll is rotatably mounted on the pivot support, and an internal gear is attached to the drive roll. A drive gear is mounted on the drive shaft, and an intermediate gear is rotatably mounted in the pivot support and is engaged between the drive gear and the internal gear. A spring is connected for biasing the pivot support to the lower rest position.

Abstract: A low profile power drive assembly (10) for conveying articles along a conveyor path includes one cylindrical roller (22) supported on an eccentric shaft (32). A first drive motor (26) and a second drive motor (26') are operatively connected to the roller (22) for synchronously rotating the roller (22). The free state position of the roller (22) is in a lower retracted position. When the first (26) and second (26 ') drive motors apply simultaneous driving torque to the roller (22), the roller (22) rises vertically to a lifted operative position to engage the underside of an article to be conveyed. A clutch (38) is disposed inside the roller (22) for controlling the upwardly normal force applied to the underside of the article being conveyed. The assembly (10) is disposable within a standard rollerway (12) in a conventional aircraft cargo conveyor system.

Abstract: A drive roller unit for driving articles on a conveyor track includes a drive roller which can be driven in rotation by an electric motor by way of a planetary transmission. The drive roller is mounted rotatably on a guide body which permits the roller to be movable relative to a base of the unit between a lower rest position and an upper drive position in which it is in engagement with the underside of the article to be driven. An internal gear ring which is fixedly connected to the drive roller is in the form of a crown wheel of the planetary transmission. A planet wheel of the planetary transmission meshes on the one hand with the internal gear ring and on the other hand with a sun wheel of the planetary transmission. The sun wheel is driven by the electric motor while the planet carrier of the planet wheel is fixedly connected to the guide body.

Abstract: A drive roller unit for driving articles on a conveyor track includes a drive roller which can be driven in rotation by an electric motor by way of a planetary transmission. The drive roller is mounted rotatably on a guide body by means of which it is movable with respect to a base of the unit between a lower rest position and an upper drive position in which it is in engagement with the underside of the article to be driven. An internal gear ring which is fixedly connected to the drive roller internally thereof forms a crown wheel of the planetary transmission, while at least one planet wheel of the planetary transmission meshes on the one hand with the internal gear ring and on the other hand with the sun wheel of the planetary transmission. The sun wheel is driven by the electric motor. The planet wheel carrier is rotatably mounted in the guide body and is provided with a tooth arrangement which rolls against a guide gear.

Abstract: A drive roller unit for driving articles on a conveyor track includes a drive roller which can be driven in rotation by an electric motor by way of a planetary transmission and a transmission arrangement including a drive gear. The drive roller is mounted rotatably on a guide body by means of which it is movable with respect to a base of the unit between a lower rest position and an upper drive position in which it is in engagement with the underside of the article to be driven. The guide body is mounted rotatably with respect to the electric motor. A first motor element such as the stator of the electric motor is rigidly and non-rotatably connected to the base while a second motor element is coupled to the sun wheel of the planetary transmission. The crown wheel of the planetary transmission drives the guide body and the other output of the planetary transmission drives the drive gear for driving the drive roller in rotation.