conveyor roller assembly

Important properties of the above support arrangement will now be understood. The rollers let loads roll from one place to another, reducing the effort it takes to move the loads. Sprockets are designed for use with a specific chain. As in embodiment 60, an additional thrust bearing disc 66 of the type described above may be used between end 53 of shaft 50 and bottom wall 36" of plug end 28". 2. A roller assembly for roller conveyors comprising: a roller having a central axis and opposite ends, each end having a central opening coaxial with said roller; a bearing insert received in each of said central openings, each insert including a circular opening coaxial with said roller for receiving and being rotatably supported by a cylindrical support shaft and retaining means on the outer periphery of said insert for preventing axial and rotational movement of said bearing insert in said central opening, said circular bearing insert opening having an annular, radially inwardly convex, curved surface defining a minimum diameter and larger diameters on either side of said minimum diameter and providing a bell-mouth shape facing outwardly of said roller end, said circular bearing insert opening adapted to receive and cooperate with a cylindrical support shaft to enable low friction, low drag rotational support of said roller assembly even when deflected under load in operation; a bottom wall in at least one of said roller central opening and said bearing insert opening at each end of said roller for closing the roller assembly and providing a thrust resisting surface. Annular opening 72 tapers inwardly toward the outer surface of the plug end but ends leaving an annular, reduced thickness section 74 which facilitates flexure of the plug end when roller 22 is deflected during loading as described above. The present roller assembly was invented as an improvement over the prior known roller assemblies in order to overcome the above problems. The roller assembly of claim 1 wherein said central opening at each roller end is blind and extends only partially through said roller end to said bottom wall; said bottom wall being formed integrally and in one piece with said roller end. The rollers contain standard ball bearings that roll smoothly at slow speeds and start rolling more easily than precision bearings. Disc 66 provides longer and more durable thrust bearing capabilities for the roller assembly. 12. In this case, the solid disc 66 is inserted against a shoulder 37" and abutted by insert 40 to hold disc 66 in position. As is evident, other supports besides right angle rails can be used to support shaft 50 and the various roller assemblies without deviating from the spirit of this invention. (See FIG. chain take conveyor unit overhead Shafts 50 are spaced along the rails as shown in FIG. In order to prevent such contamination, the roller conveyors are frequently washed or steam cleaned which subjects them often to caustic and corrosion-inducing fluids and materials. Central opening 42 includes generally axially extending, side surfaces which are radiused or curved and annular such that the opening is bell-mouth shaped on either end and has a minimum diameter at the center of the insert (diameter "B" in FIG. A third embodiment 70 of the invention (FIG. When that happens, youll need to ask yourself some questions is it better to replace your conveyor rollers or have them repaired? 10 is a sectional view of a modified form of the bearing insert including a bottom wall integral and in one piece therewith; and. 513-821-7259, Toll Free: 6 at the center of the insert opening 42, for example 0.325 inches. The entire assembly may be supported on legs 18 or other supports such that one end of the assembly is higher than the other and objects supported atop the series of roller assemblies 20, 60 and/or 70 suspended between rails 12, 14 will travel downhill via gravity while supported by the rollers. The rollers let loads roll from one place to another, reducing the effort it takes to move the loads. 6 is a sectional view taken along a diameter of the bearing insert; FIG. Founded on innovation, Rolcon was the first roller manufacturer to spring load both ends of the conveyor roller as standard and was the first to develop the patented frame saving cartridge bearing assembly. The insert 40 is inserted with the apexes of tapered fins 44 pointing inwardly so that the wedge shape facilitates insertion. The rollers let loads roll from one place to another, reducing the effort it takes to move the loads. Non-marring conveyor rollers each have a smooth plastic covering that won't damage delicate surfaces or finishes on conveyed items, such as glass or paint. 7 and 8, where like numerals indicate like parts, another embodiment 60 of the present invention includes a tapered, annularly shaped recess 60 in the outer end surface of plug end 28' which is secured in the end of roller 22 in the same manner as described above in connection with embodiment 20. The rollers have standard ball bearings that roll smoothly at slow speeds and start rolling more easily than precision bearings. Adding lagging to conveyor rollers and pulleys can improve [], Over time, your conveyor systems components will wear down and require repairs or replacement, including your conveyor rollers. Below, learn more about how to recognize signs of wear and tear in your [], Local: As shown in FIG. 11) if it is formed in one piece with the roller. These conveyor rollers are installed in roller conveyors to support and move items on the conveyor. Typically, disc 66 will have a thickness of approximately 0.030 inches and will have anti-friction or friction-reducing properties such as self-lubricity as in the case of Teflon. These and other objects, advantages, purposes and features of the invention will become more apparent from a study of the following description taken in conjunction with the drawings. 20. 5. These rollers have sealed precision ABEC1 bearings that provide tighter tolerances, more weight capacity, and quieter operation than standard bearings. If you disable this cookie, we will not be able to save your preferences. Separate formation of the bearing inserts and support shafts from higher cost, more wear-resistant materials enables lower overall assembly cost while maintaining load capabilities because the remainder of the assembly can be made from lower cost materials. The sprocketed rollers have teeth that engage with the drive chain to prevent the chain from slipping, even in dirty or oily conditions. 2; FIG. In addition, such organic plastic, corrosive-resistant materials are often less rigid and allow greater overall roller deflection when loaded than prior all metal assemblies. FEIs specialized overhead trolleys are built for high-volume production and durability. 11) or plug end 28 need not be blind but can be open (shown in phantom in FIGS. The softer, less rigid PVC plug ends facilitate accommodation of deflection when the rollers are loaded, as explained below, yet suitably retain the inserts 40 to maintain proper bearing support. The invention eliminates contamination by food retention in the roller and supporting structure and enables frequent and repetitive washing and steam cleaning without corrosion or degradation to maintain the roller in a highly sanitary condition. Most rollers ship within one week as standard and we offer expedited shipping for rush orders. Conveyor rollers are used in roller conveyors and material transport stands to support and move bulky items. Delrin 500 CL is a self-lubricating, acetal, homopolymer resinous plastic. The roller assembly of claim 1 wherein said roller has an opening at each end; a pair of plug ends, one plug end received in and closing each end of said roller, each plug end including one of said central openings receiving one of said bearing inserts; each of said plug ends including an annular recess concentric with said roller axis providing a reduced thickness area facilitating flexing of said plug to permit proper bearing contact when said roller is loaded. The roller assembly of claim 1 wherein said retaining means on each of said bearing inserts include a plurality of spaced projections which engage the sides of said central opening. Alternately, a modified form 40' of insert 40 could be used with plug ends 28" or roller 22' including through openings 34a". These rollers can be used to replace or upgrade the existing rollers on compatible conveyors or stands. Further, in a preferred form, the bearing insert opening has an annular, radially inwardly curved surface defining a minimum diameter and larger diameters on either side thereof. Use them to replace or upgrade the existing rollers on powered conveyor systems that will carry items with delicate surfaces or finishes, such as glass or paint. This website uses cookies so that we can provide you with the best user experience possible. The sharp edges 44c and radially extending faces 44b thereafter engage the sides of the opening in the plug end and prevent withdrawal of the bearing insert. F.E.I.s roller end bearings are well equipped for use in the wet or washdown environments of a processing floor or use in corrosive or chemical conveyor applications. Our top-of-the-line overhead trolley components are pre-engineered based on industry standards, and are proven to eliminate high overhead costs of custom manufacturing, engineering, and delivery delays. 22. Sanitary & Anti-Corrosion Conveyor Specialists. 1; FIG. For these reasons, we may share your site usage data with our analytics partners. Corrosion-resistant stainless steel conveyor rollers can withstand frequent washdowns, high humidity, exposure to corrosive chemicals, and other harsh conditions that might corrode steel or aluminum rollers. 1 and are secured in place by nuts 56, washers 57 and lock washers 58 in vertically elongated apertures 54. 9 and 11) to the roller interior and closed with a bottom wall on the bearing insert (FIG. Whether your requirements are large or small, we have the capabilities to meet your needs. F.E.I. Whatever your material handling needs, lagging is added to a pulley or roller to increase friction. 8. As compared to previously known structures, the present assembly is less expensive to build while retaining corrosion-resistant properties and high load capabilities while maintaining low-friction, low-drag characteristics. Roller materials are available in stainless steel, PVC, UHMW or mild steel. Plug end 28 thus fits tightly within and completely closes and seals the end of roller 22 leaving no cracks or crevices into which contaminants can enter and buildup. The roller assembly of claim 22 wherein said plug end includes an annular recess concentric with said roller axis providing a reduced thickness area facilitating flexing of said plug to permit proper bearing contact when said roller is loaded. In one form, the invention provides a roller assembly including a roller having a central axis and opposite ends. Alternately, plug ends 28 could be molded in one piece with a roller 22' such that both roller ends include closed, blind openings 34 with bottom walls 36 for receipt of inserts 40 as explained below. The roller assembly prevents contaminants from entrapment within the roller or associated parts and may be repeatedly washed or steam cleaned without corrosion or degradation. Annular opening 62 tapers inwardly from the larger opening at the end surface to facilitate cleaning and forms a reduced thickness annular section 64 spaced inwardly and radially outwardly of the end 53 of shaft 50. a pair of plug ends, one plug received in and closing each end of said roller, each plug having a blind central opening coaxial with said roller and extending partially through said plug end to a bottom wall; a bearing insert received in each of said plug end openings and abutting said bottom wall, each insert including a circular opening coaxial with said roller extending entirely therethrough for receiving and being rotatably supported by a cylindrical support shaft and retaining means on the outer periphery of said insert for preventing axial and rotational movement of said bearing insert in said blind opening, said circular bearing insert opening having an annular, radially inwardly convex, curved surface defining a minimum diameter and larger diameters on either side of said minimum diameter and providing a bell-mouth shape facing outwardly of said roller end, said circular bearing insert opening adapted to receive and cooperate with a cylindrical support shaft to enable low friction, low drag rotational support of said roller assembly even when deflected under load in operation; said roller, plug ends and bearing inserts formed from corrosive-resistant materials and enabling ease in cleaning of said roller. 7 is a fragmentary, sectional, side elevation of a modified form of the roller assembly of the present invention; FIG. The support rails 12, 14 are braced and separated by angle irons 16 welded or otherwise secured therebetween intermediate the rollers and below the top surfaces thereof. Assembly of roller 22, plug ends 28 and bearing inserts 40 is accomplished by applying a coating or layer of suitable solvent adhesive to the outer periphery of body portion 30 of plug end 28 as well as the radially extending planar surface at the rear side of annular flange 32 and inserting the plug end within the hollow open end of one end of roller 22. The Delrin 500 CL inserts are harder, more wear-resistant, and have a higher pressure vs. velocity factor than PVC and yet are easily molded to include projections 44. 11 is a fragmentary, sectional view of a modified roller including an integral end. They are typically used for conveying heavy loads such as pallets, drums, and castings. The roller assembly of claim 17 wherein said roller has an opening at each end; a pair of plug ends, one plug end received in and closing each end of said roller; each plug end including one of said central openings receiving one of said bearing inserts; said roller is formed from polyvinyl chloride thermoplastic material, said bearing insert being formed from an acetal resinous plastic and said shafts are formed from a corrosive-resistant metal such as stainless steel, said plug ends being secured in said roller with a suitable solvent adhesive such as that containing cyclohexanone. The roller assembly of claim 14 wherein said shafts are each bolted to a support rail through an oversize aperture in said rail to allow adjustment of the position of said roller with respect to the rails, said rails extending along either end of said roller. Such supports do not adequately prevent wear, especially when the rollers are operated under load, and do not prevent or reduce contamination for sanitary purposes. Some previously known roller assemblies of metal or other materials have used support inserts which move either axially or rotationally. Use of entire stainless steel rollers and bearings is also undesirable because of the high cost and expensive machining requirements of such steel. Also, the metal itself is subject to corrosion which further reduces its desirability for sanitary applications. Otherwise, embodiment 60 is the same as embodiment 20 described above. 6. Bearing surface 52 has a diameter, for example 0.312 inches, matched to be slightly smaller than the minimum diameter indicated at "B" in FIG. Use of a separate bearing insert formed from wear-resistant, corrosive-resistant, preferably organic, polymeric plastic enables lower assembly cost, greater durability and longer life than certain prior roller assemblies without external lubrication inasmuch as the self-lubricating insert is engaged by a stainless steel shaft which itself is wear and corrosion-resistant. These rollers can be used to replace or upgrade the existing rollers on compatible conveyors or stands. Insert 40 includes a cylindrical outer peripheral surface 41 and a central opening 42 extending entirely therethrough which is coaxial with plug end 28 and roller 22 when assembled. 4 is a perspective, exploded view of the roller end plug and bearing insert prior to assembly; FIG. Projections 44 include rounded, tapered, wedge-like fins 44a, which are actually in the shape of halves of cones, the apexes of which extend in a direction parallel to the axis of the insert. A roller assembly for roller conveyors comprising; a roller having a central axis and opposite ends, each end having a central opening having an interior surface and being coaxial with said roller; bearing insert means for receiving and being supported by an axle received in each of said central openings, each bearing insert means including an opening coaxial with said roller and retaining means on its outer periphery for preventing axial and rotational movement of said bearing insert means in said central opening, said retaining means including a plurality of projections having sharp edges spaced outwardly of said outer periphery of said bearing insert means, said sharp edges engaging and being embedded in said interior surfaces of said central roller openings and resisting axial withdrawal and movement of said bearing insert means; a bottom wall in at least one of said roller central opening and said opening of said bearing insert means at each end of said roller for closing the roller assembly. Projections 44 extend generally parallel to the axis of the insert and roller and are spaced from one another equally about the cylindrical periphery of the insert. Many of such structures include many openings and spaces which are very difficult to keep clean. Take up assemblies allow easy tensioning of conveyors. The roller assembly of claim 1 wherein said bottom wall is a disc inserted within said central opening intermediate said bearing insert and a portion of said roller end forming said central opening. We use cookies to improve user experience and analyze website traffic. As shown in FIGS. 2 is an end elevation of the gravity roller conveyor shown in FIG. FIG. 21. The roller assembly of claim 11 wherein said recess is intermediate said central opening and the outer periphery of said plug end, tapers inwardly from an annular opening at the outside surface of said plug end, and extends only partially through said plug end. Also, opening 34" could include a reduced diameter portion 34a" extending entirely through plug end 28" (FIG. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors, Adaptations of individual rollers and supports therefor, West Virginia University Research Corporation, Plastic conveyor roller and method of making same, Conveyor roller and bearing assembly with external support, Roller assembly and method for manufacturing the same, Fastening structure and mounting structure, Supporting roller for an open conveyor belt and the use thereof, Bearing life extender for conveyor type rollers, Polyvinyl chloride (PVC) feed roller device and method of making the same, Apparatus for treating flat brittle substrates, Chain transmission device for driving camshaft, Chain guide and chain transmission device, Chain transmission device for driving camshafts, Horizontal maneuver dynamical system for pallet carrying shelf, Cartridge bearing assembly for roller conveyors, Roller assembly of a cargo loading system, Roller conveyor for transporting individual articles such as loaded pallets, or container boxes, Conveyor roller mounting device with curved surfaces, Horizontal motorized dynamic system for pallet-carrier racks, Automatically tiltable small roller structure of slide bearing type, Caster with a fouling-resistant bearing cup feature, Rotary seal with relief angle for controlled tipping, Self-aligning bearing for high temperature applications, Self-adjusting angular contact spherical bearing, Two-piece thrust washer for universal joint, METHOD FOR MANUFACTURING AN APPARATUS FOR CONVERTING A ROTARY MOVEMENT IN A LINEAR MOVEMENT. Like embodiments 20 and 60, however, the curved engaging surfaces 42 of insert 40 facilitate proper rotational movement even under load by allowing pivotal movement of plug end 28" should the deflection be more than can be accommodated by the reduced thickness area 74 of the plug ends. As is best seen in FIG. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. FIG. CONVEYORS FOR LOADING OR TIPPING,SHOP CONVEYOR SYSTEMS ORPNEUMATIC TUBE CONVEYORS, Rollers, e.g. The roller assembly of claim 1 wherein said bearing insert includes said bottom wall in one piece therewith, said bearing insert opening extending only partially through said insert. 13. Contact between the minimum diameter portion shown at B in FIG. The roller assembly of claims 1, 6, 7 or 8 wherein said roller has an opening at each end; a pair of plug ends, one plug end received in and closing each end of said roller, each plug end including one of said central openings receiving one of said bearing inserts. Accordingly, the present invention provides a roller assembly for gravity and power roller conveyors, especially those used in sanitary applications such as for food processing and the like. The edges 44c between the rounded top surface of projecting fins 44a and faces 44b are sharp and deform and engage or dig into the sides of the opening 34 in plug end 28 to both prevent axial movement or "walking" of the insert out of the opening as well as rotation of the insert around in the opening. The roller assembly of claim 21 wherein said retaining means on each of said bearing inserts include a plurality of spaced projections which engage the sides of said blind central opening of said plug end. 24. While several forms of the invention have been shown and described, other forms will now be apparent to those skilled in the art. Insert 40' is either molded or machined, depending on the material desired, to include the blind bell-mouth opening 42'. A roller assembly for roller conveyors, and especially sanitary roller conveyors, comprising: a roller having end surfaces and hollow portions coaxial with said roller at least at the ends thereof; an organic, polymeric plastic plug end secured within each hollow end of said roller, said plug ends each having a body portion closely matched in size to said hollow roller ends to fit tightly therewithin, an annular flange abutting said end surface of said roller to limit insertion of said plug end in said roller, and a blind opening coaxial with said roller extending into the outer end surface of said plug end; an organic, polymeric plastic bearing insert in said blind opening having a circular opening therethrough having a diameter varying from one side of said bearing insert to the other and coaxial with said roller, the diameter of said opening being a minimum at the center of said bearing insert and progressively increasing toward both of said sides to form an annular, radially inwardly curved, convex surface in said opening and bell-mouth ends on said insert opening, the outer periphery of said bearing insert including retaining means for preventing axial and rotational movement of said bearing insert in said blind hole; a pair of stainless steel cylindrical support shafts each having a support surface with a diameter matched to that of said minimum diameter of said bearing insert opening, one shaft received in each of said bearing insert openings and a convex end surface on each of said shafts engaging the bottom of said blind hole and providing a thrust bearing for said roller, said curved insert openings and cylindrical support shafts cooperating to enable low friction, low drag rotational support of said roller assembly even when deflected under load in operation; and. Multiple styles, bearings and mounting exist. Although PVC is preferred, other lightweight, corrosion-resistant materials, including some metals such as aluminum, could be used. A plate 17 may underlie the extent of the rollers although the same is not necessary when braces 16 are used. 10) or a separate disc (FIG. Referring now to the drawings in greater detail, FIGS. An important problem in the use of conveyor rollers in sanitary roller conveyor applications is the ability to prevent the buildup of contaminants such as food particles and the like in crevices and interiors of parts such as the rollers and support mechanisms. The closed nature of the present invention prevents contaminants from building up within the roller assembly and enables ease in cleaning of the roller and the bearing-support areas. High-performance steel conveyor rollers are suitable for high-speed conveying tasks and are commonly used to replace or upgrade the existing rollers on powered conveyor systems in warehousing, transportation, and sorting operations. 17. Also known as chain-drive live rollers, they are ideal for moving heavy items such as pallets, drums, and bulk containers. Such deflection upon loading can cause, in certain circumstances, greater drag and friction and consequently more binding, heat buildup and wear. With light loads, the bell-mouth opening 42 provides such approximate planar contact and thus low torque and drag. F.E.I., Inc offers many styles of gravity rollers for Wash-Down and traditional warehouse applications. The rear surfaces within the rollers of all three plug ends 28, 28' and 28" are recessed for weight reduction and material saving purposes. A roller assembly for roller conveyors and especially sanitary roller conveyors, comprising: a roller having a central axis and an opening at each end. 15. 1. Preferably, the tubular rollers 22 are formed from a corrosion-resistant, organic, polymeric, thermoplastic material such as polyvinyl chloride (PVC) typically having a thickness of approximately 0.20 inches and a specific gravity of 1.3 to 1.58. In addition, the curved surfaces enable cleaning fluids and steam to penetrate the bell-mouth opening 42 to the bottom wall of the plug end, roller or bearing insert or thrust disc 66, as explained below, and clean out any undesired contaminants. Each of the roller assemblies 20 includes a tubular roller 22 having a hollow interior 24 and planar ends 26. The outer circumferential surface of the roller 22 is flush with the outer surface of flange 32. The roller designs combined with our exclusively processed Lubra-Tuf material offer an excellent alternative to conventional ball bearing rollers in harsh environments. These cooperating, curved surfaces allow the slight pivoting or rocking motion to occur during roller deflection while continuing only minimal rotational bearing contact between the insert 40 and shaft 50. Preferably, wear-resistant, corrosion-resistant, organic, polymeric plastic, bearing inserts are axially and rotationally retained by retaining means within openings in the opposite ends of a corrosion-resistant roller. The roller assembly of claim 14 wherein said central opening at each roller end is blind and extends only partially through said roller end to said bottom wall; said bottom wall being formed integrally and in one piece with said roller end; a thin disc of wear-resistant, organic polymeric plastic material in each of said central openings and abutting against the bottom wall of said opening, said convex shaft end engaging one side of said disc. Each end has a central opening coaxial with the roller which receives a bearing insert means for receiving and supporting an axle or a support shaft. Each roller has a spring-retained axle that can be pushed in to install or remove the roller from the conveyor frame or stand. Although such conveyor rollers have been easier to clean, the use of organic plastic corrosive-resistant parts made from such materials has often reduced the load rating of such conveyor rollers as compared to prior all-metal or steel roller assemblies. Lightweight aluminum conveyor rollers weigh less than steel rollers and are commonly used in unpowered (gravity-flow) conveying applications where the conveyor will be disassembled, moved, or reconfigured frequently. Conveyor 10 includes a pair of roller support rails 12, 14 which are parallel to one another and extend along and adjacent to the ends of the rollers which traverse the space therebetween. This means that every time you visit this website you will need to enable or disable cookies again. Since 1988 Rolcon has been one of the leading manufacturers of conveyor rollers manufacturing a broad range of roller sizes and serving a wide range of industries. High-durability steel conveyor rollers have a higher weight capacity and provide more resistance to impact, shock, and abrasion during conveying tasks than general purpose steel rollers.

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