1、Unit Handling ConveyorsLINESHAFT DRIVEN LIVE ROLLER CONVEYORSCEMASTANDARDNO. 406-2003ISBN 978-1-891171-34-5Conveyor EquipmentManufacturers AssociationANSI / CEMA 406-2003 (R2009)Reaffirmation of ANSI/CEMA 406-2003( Approved January 22, 2009 )SAFETY NOTICEThe Conveyor Equipment Manufacturers Associat
2、ion has developed Industry Standard Safety Labelsfor use on the conveying equipment of its member companies.The purpose of the labels is to identify common and uncommon hazards, conditions, and unsafepractices which can injure, or cause the death of, the unwary or inattentive person who is working a
3、tor around conveying equipment.The labels are available for sale to member companies and non-member companies.A full description of the labels, their purpose, and guidelines on where to place the labels on typicalequipment, has been published in CEMAs Safety Label Brochure No. 201. The Brochure is a
4、vailablefor purchase by members and non-members of the Association. Safety Labels and Safety LabelPlacement Guidelines, originally published in the Brochure, are also available free on the CEMA WebSite at http:/www.cemanet.org/CEMA_Safety_Pg.htmPLEASE NOTE: Should any of the safety labels supplied b
5、y the equipment manufacturer becomeunreadable for any reason, the equipment USER is then responsible for replacement and location ofthese safety labels.Replacement labels and placement guidelines can be obtained by contacting your equipment supplieror CEMA.For Information on Company Membershipvisit
6、the CEMA Web Site athttp:/www.cemanet.orgConveyorChainCEMA ORGANIZATIONAL CHARTControls PalletizersMeet in March and/or SeptemberConferenceStrategic PlanningInsuranceMeetingsMarketing / MembershipStatisticsFinance and BudgetPast PresidentsBulk HandlingSectionCommitteesUnit HandlingSectionEngineering
7、 ConferenceConveyor ChainPerformance TerminologyUnit Handling StandardsIdlersPulleysBeltSystemsScrewConveyorsBelt ManualAccessoriesSafety ControlsTerms andDefinitionsInternationalStandardsMeets Each JuneScrewConveyorsBulk HandlingComponentsand SystemsGeneral Bulk Handling SectionBulkAccessoriesUnit
8、Handling Conveying SectionCOMMITTEES BOARD OF DIRECTORS OFFICERSiFOREWORDLineshaft Driven Live Roller (Lineshaft Conveyors) - Conveyors with rollers powered by drive belts from arotating shaft used to move unit loads of varying sizes and shapes.The path is usually level, however slight inclines or d
9、eclines are permitted depending upon the unit load beinghandled, the belt tension and the drive friction between the drive belt, spool and rotating lineshaft.Lineshaft conveyor can be operated at the speed best suited for the work being performed. They are used toaccumulate, transport, merge, diverg
10、e, and sort unit loads.The purpose of this document is to establish nomenclature and application guidelines for use in manufactur-ing and applying lineshaft driven live roller conveyor.For additional information relating to definitions and selection of common components, see the latest editionof the
11、 following publications: CEMA Standard No. 102, Conveyor Terms and Definitions; CEMA StandardNo. 401, Roller Conveyors - Non Powered; CEMA Standard No. 402, Belt Conveyors; CEMA Standard No.403, Belt Driven Live Roller Conveyors; CEMA Standard No. 404, Chain Driven Live Roller Conveyors; andCEMA Sta
12、ndard No. 405, Slat ConveyorsThe illustrations throughout this book are schematic in nature and represent the general nature of a particu-lar device. The illustrations are not intended to represent the recommended safety configurations sinceguarding has been omitted to permit clarity in showing the
13、operational characteristics of the device. Referto the current editions of ANSI/ASME B20.1, Safety Standard for Conveyors and Related Equipment; ANSI/ASME B15.1, Safety Standard for Mechanical Power Transmission Apparatus; and ANSI Z244.1, AmericanNational Safety Standards for Lockout/Tagout of Ener
14、gy Sources - Minimum Safety Requirements; Title 29,Code of Federal Regulations (29 C.F.R.) Part 1910.147, The Control of Hazardous Energy (lockout/tagout);Title 29, Code of Federal Regulations (29 C.F.R.) Part 1910 Subpart O, Machinery and Machine Guarding.Consult ASME or ANSI for the latest edition
15、s.CONVEYOR EQUIPMENT MANUFACTURERS ASSOCIATION6724 Lone Oak BlvdNaples, Florida 34109Web Site: http:/www.cemanet.orgStandard No. 406 - Copyright 2009Printed in the U.S.A.Section Page PDFDEFINITIONS 1 1 5APPLICATIONS 2 5 9TECHNICAL DATA 3 17 21TABLE OF CONTENTSDISCLAIMERThe information provided in th
16、is document is advisory only. These recommendations areprovided by CEMA in the interest of promoting safety in the work place. Theserecommendations are general in nature and are not intended as a substitute for a thoroughsafety program. Users should seek the advise, supervision or consultation of qu
17、alifiedengineers or other safety professionals.Any use of this document, the information contained herein, or any other CEMA publicationmay only be made with the agreement and understanding that the user and the users companyassume full responsibility for the design, safety, specifications, suitabil
18、ity and adequacy ofthe system component, or mechanical or electrical device designed or manufactured usingthis information.The user and the users company understand and agree that CEMA, its member companies,its officers, agents and employees shall not be liable in any manner under any theory of liab
19、ilityfor the user or users reliance on these recommendations.The users and the users company agree to release, hold harmless and indemnify CEMA, itsmember companies, successors, assigns, officers, agents and employees from any and allclaims of liability, costs, fees (including attorneys fees), or da
20、mages arising in any way out ofthe use of this information.CEMA and its member companies, successors, assigns, officers, agents and employeesmake no representations or warranties whatsoever, either express or implied, about theinformation contained in this document, including, but not limited to, re
21、presentations orwarranties that the information and recommendations contained herein conform to any federal,state or local laws, regulations, guidelines or ordinances.iiCEMA Standard No. 406-2003 (R2009)Reviewed and Revised byUnit Handling Sectionof theCEMA Engineering ConferenceNote - CEMA Has Reaf
22、firmed the 2003 Edition.This 2009 Edition is Identical to the 2003 Edition1 SECTION 1 TERMS AND DEFINITIONS For general definitions, see also CEMA Publication 102, Conveyor Terms and Definitions and CEMA Publication 110, Electrical Terms and Definitions. ACCESSORY (LINESHAFT) - A device which receiv
23、es power from and contributes to the horsepower requirement of the lineshaft. CARRYING ROLLER - The conveyor roller upon which the object being transported is supported. (See Fig. 1, Page 4) COEFFICIENT OF FRICTION - A numerical expression of the ratio between the force of contact existing between t
24、wo surfaces and the resistant force tending to oppose the motion of one with respect to the other. The coefficient of friction is used in determining the power necessary to drive a machine, or to determine the maximum angle of inclination for a conveyor. CONVEYOR WIDTH - In unit handling, the dimens
25、ion inside to inside of frame rails. Other abbreviations used are: “BF“ - between frame, “BB“ - back to back, “IF“ - inside frame. (See Fig. 1, Page 4). COUPLER CHAIN - A chain, plastic or metal, which performs the function of connecting one sprocket to an adjacent sprocket. (See Fig. 2 , Page 4). C
26、OUPLER SPROCKET - A sprocket located at the extreme end of a lineshaft positioned to allow connecting to a second sprocket on a second lineshaft by using a coupler chain. (See Fig. 1 2) when thecarrying roller is stopped, the drive belt stops, the spool stops, only the shaft keeps turning.This is an
27、 important consideration when there are people placing product on or workingaround the conveyor.In some locations within a system, a higher driving force may be desired. Some methods toaccomplish this are (1) by cutting a keyway in the lineshaft and using a spool with an integralkey which prevents s
28、lipping of the spool in the lineshaft, (2) by using drive belts which providehigher belt tension, or (3) spools with a higher coefficient of friction. Typical applications areat intersections and locations where deflectors are employed.Another commonly used device is the speed-up spool. A speed-up s
29、pool is a spool with alarger outside diameter. When speed-up spools are mounted on the same lineshaft as otherspools the rollers driven from the speed-up spools turn at higher revolutions per minute(RPMs). Speed-up spools are used to increase the product speed in an area where a gapbetween products
30、is desired. Some common applications are at diverters, transfers, stops orphoto sensors.Lineshaft conveyors are typically installed horizontal; however, depending on the producthandled, they may be declined or slightly inclined. Lineshaft conveyor performs well in adecline application because the dr
31、ive belts provide resistance preventing the carrying rollerfrom free rolling.Ideally, three (3) rollers should be under the load at all times. Occasionally, two (2) rollers willbe sufficient depending on the product handled. Typical roller spacings are 1.5“ to 6“ oncenter. Lineshaft conveyors are no
32、rmally run at speeds between 20 and 120 feet per minute(FPM); however, greater or lesser speeds may be used. Lineshaft conveyor is suited forhigher speeds because the elastic drive belts maintain a continuous load on the rollerbearings. This reduces the shock to the ball bearings resulting in quiet
33、running conveyors.When variable speed is required, a mechanical speed changer between the motor andreducer may be used. Electrically, the speed may be changed using SCR or variablefrequency drives.7Lineshaft conveyor should be considered when the following conditions exist:1. Clean and dry applicati
34、on2. Required quiet operation3. Personnel work along side the conveyor4. Temperature between +10 degrees F and +120 degrees F (Note: evaluate type of roller bearing lubricant with manufacturer.)5. Conveyor layouts with numerous components and/or accessoriesCareful consideration and consultation with
35、 the manufacturer should be exercised whileapplying lineshaft conveyor when the following conditions exist:1. Wet or oily environment2. Abrasive or corrosive environment3. Presence of ultra-violet light and sunlight (effects life of drive belt)4. Application requiring frequent start/stop operation5.
36、 Elevation changes from horizontal6. Temperatures below +10 degrees F or above +120 degrees FConveyor WidthNormally the conveyor is 2“ to 3“ wider than the widest load. Loads may require a greaterwidth for clearance around horizontal curves.() Clearance“2Radius2LengthPackageWidthPackageRadiusG22+=Fi
37、gure 28Drive ArrangementThere are many variations in drive arrangements. A gearmotor is the most common. Theoutput shaft of the reducer is connected to the lineshaft by a chain drive or synchronous beltdrive. The reducer may be right angle or parallel type. The gearmotor may be mountedinternal or ex
38、ternal to the frame and be underhung or side mounted.SupportsFloor supports should be provided with vertical adjustment for leveling the conveyor. Adjustable hangers, such as rods with threaded ends, are generally used with conveyors atelevations over seven feet above the floor.Support spacing is de
39、pendent on loading, and in some cases, on building construction. Supports must be spaced to limit frame deflections as detailed in CEMA Standard 401, “RollerConveyors - Non Powered“.Accumulation ConveyorLineshaft accumulation conveyor is a powered live roller conveyor designed to minimize oreliminat
40、e the pressure build-up between adjacent unit loads under blocked load conditions.Zero or low pressure can be obtained through zone controlled type operation. Individualrollers or sections of the conveyor can be customized to create dwell stations, accumulationareas, or reverses in direction of trav
41、el from a common lineshaft.In some types of accumulation conveyor auxiliary sensing rollers are used to release power tothe lineshaft sequentially in zones as the product is accumulated. In other types a brake isengaged to stop the carrying rollers in each zone where accumulation is required. For mo
42、reinformation on accumulation conveyors consult the manufacturers. Many methods areproprietary and may be patented9ACCESSORIESA spur section that is driven from the main line conveyor lineshaft. Commonly these are 30 or 45for merging and diverging. Since the spur portion is driven by a crossover and
43、 a universal joint, thespur and main line section are fabricated as a unit.Straight sections with tapered ends that mount up to main lines. These are used to create a divergeor merge in the system. Commonly, these are 30 or 45 for merging and diverging. A spur isindependently powered. See Intersecti
44、ons.10A wide straight section used to merge two parallel lines into one. The rollers are skewed to acenter rail to direct the product to exit the downstream end on the centerline of the section.It is possible for both of the infeed lines and the take-away lines to be powered from the samesource.Used
45、 to change horizontal directions. Common degrees are 30, 45, 60 and 90. Others are possiblebut are limited by the universal joints and the need to have two support bearings on each shaftsegment.11Used to transfer product either on or off of a main line conveyor at a 90 angle. The carrying surfaceof
46、the transfer can be chain or belt. Some manufacturers offer a bi-directional unit than can transferto or from both sides of the main line directly across from each other. There are various types of diverters that utilize different mechanisms to direct product from a main lineconveyor onto an adjacen
47、t conveyor. Some types are pop-up wheel, swivel roller and pivot roller.12This enables the transference of power from one side of the conveyor to the other, or betweenadjacent conveyors. This device can also affect a speed change for a section of the conveyor.Used when a lineshaft conveyor is instal
48、led on an incline or decline to make a smooth vertical transitionto horizontal. Typically power transmission is accomplished by a universal joint through the transition.13A pivoted powered section that opens for passage by personnel. A spring loaded clutch is commonlyused to connect the lineshaft in
49、 the gate with the main lineshaft in the conveyor when the gate isclosed. Power cannot be transferred through the gate, therefore a drive is needed on each side ofthe gate.14OTHER DEVICES FREQUENTLY USEDWITH LINESHAFT CONVEYORDEFLECTORS A mechanical device which guides product from one side of the conveyor to theother. There are various reasons for doing this but typically it is for guidingproducts from one conveyor line to another. There are two basic types ofdeflectors.1. Non-PoweredA plain bar faced with some type of low friction material or a
