1、BRITISH STANDARD BS EN 14021:2003 Stone shields for off-road motorcycling suited to protect riders against stones and debris Requirements and test methods The European Standard EN 14021:2003 has the status of a British Standard ICS 13.340.10 BS EN 14021:2003 This British Standard was published under
2、 the authority of the Standards Policy and Strategy Committee on 22 January 2004 BSI 22 January 2004 ISBN 0 580 43291 2 National foreword This British Standard is the official English language version of EN 14021:2003. WARNING. The UK, as a member of CEN, is obliged to publish EN 14021:2003 as a Bri
3、tish Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK consistently voted against its approval as a European Standard. The reason for this disapproval is that during discussion of this standard by BSI Committee PH/3/9, which mirrors the w
4、ork of the CEN Committee, TC162/WG9, several UK experts expressed the opinion that the average peak force requirement given in 4.7 may be too high. BSI will assume no liability whatsoever for the failure on the part of users of this standard not to consider this aspect. The UK participation in its p
5、reparation was entrusted by Technical Committee PH/3, Protective clothing, to Subcommittee PH/3/9, Clothing for protection of riders of motorcycles, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references
6、 The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Stan
7、dards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the
8、 responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the
9、EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14021 December2003 ICS13.340.10 Englishversion St
10、oneshieldsforoffroadmotorcyclingsuitedtoprotectriders againststonesanddebrisRequirementsandtestmethods Parepierrespourlemotocyclismetoutterraindestins protgerlesmotocyclistescontrelespierresetautres menusprojectilesExigencesetmthodesdessai ProtektorengegenAufprallvonSteinenund GesteinstrmmernfrdenSc
11、hutzvonGelnde MotorradfahrernAnforderungenundPrfverfahren ThisEuropeanStandardwasapprovedbyCENon7November2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbib
12、liographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifie
13、dtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom.
14、 EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14021:2003EEN14021:2003(E) 2 Contents Page Foreword. 3 In
15、troduction 4 1 Scope . 5 2 Normativereferences . 5 3 Definition 5 4 Requirements 5 4.1 Construction 5 4.2 Minimumprotectedareas . . 5 4.2.1 General. 5 4.2.2 Breastguard 5 4.2.3 Shoulderguards. . 6 4.2.4 Bicepsguards . 6 4.2.5 BackGuard 6 4.3 Sizing 6 4.4 Surfacecontinuity . 6 4.5 Attachments 6 4.6 E
16、rgonomicrequirements . 6 4.7 Impactperformancerequirements. . 7 5 Testequipment . 7 5.1 Apparatus 7 5.1.1 Droppingapparatus 7 5.1.2 Hemisphericalimpactor . 7 5.1.3 Anvil . 7 5.1.4 Forcemeasurementinstrumentation . 7 5.1.5 Toleranceanduncertainty . 8 5.2 Circularprobeforsurfacecontinuitytest 8 6 Test
17、methods . 8 6.1 Samplesfortechnicalexaminationandergonomictesting. 8 6.2 Visualcheckandmeasurement 8 6.3 Testingthesurfacecontinuityofstoneshields . . 8 6.4 Testingrestraintsofstoneshields . 8 6.5 Ergonomicassessmentofstoneshields . 8 6.6 Impacttestingofstoneshields . 9 7 Marking 9 8 Informationsupp
18、liedbythemanufacturer .10 AnnexZA (informative)ClausesofthisEuropeanStandardaddressingessentialrequirementsor otherprovisionsofEUDirectives . 14 Bibliography . 15EN14021:2003(E) 3 Foreword Thisdocument(EN14021:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC 162“Protective clothingincludinghandandarmp
19、rotectionandlifejackets”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyJune2004,andconflictingnationalstandardsshallbewithdrawnat thelatestbyJune2004. Thisdocumenthasbeenpreparedunderam
20、andategiventoCENbytheEuropeanCommissionandthe EuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. Thisdocumentincludesabibliography. AccordingtotheCEN/CENELECInternalRegulations,th
21、enationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands, Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN14021
22、:2003(E) 4 Introduction StoneShieldsconformingtothisEuropeanStandardarearticulategarmentsintendedfortheprotectionof chest,optionallyofshoulders,backandbicepsspecificallyagainstloftedstonesanddebrissuchasthose ridersoftenencounterinoffroadmotorcyclingandinalliedsportsactivitieswherethesehazardsmayexi
23、st. Acompletestoneshieldprovidesprotectiontothewholeofthetorso. Theessentialpartofastoneshieldisthebreastguard,whichmaybeassociatedwiththeshoulderguards, thebackguardandthebicepsguards. Whenthestoneshieldsareintheformofarticulateassembliesthepartscanbeheldtogetherbydiversified joiningdevicesandcanbe
24、madeoutofmixedsoft/hardorhardmaterials(shells).Inthelattercasetheyare fittedwithsuitablepaddingontheinnersurface,andtheiredgesareroundedtoavoidbruisingoftheskin.EN14021:2003(E) 5 1Scope ThisEuropeanStandardspecifiesrequirementsandtestmethodsforthestoneshieldstobewornbyyouths andadultsofeithersextopr
25、ovidelimitedprotectionagainstloftedstonesanddebriswhileridingmotorcycles inmotocrossandotheroffroadactivitiesondirtroads. HencethisEuropeanStandardcontainsgeneralandperformancerequirementsforthematerialsutilisedand requirementsforsizes,shapes,markingandassemblymethodology. ThisEuropeanStandardisnota
26、pplicabletostoneshieldforchildrenandforpeoplewithchestgirthbelow 75cm. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted below.Inthecaseofdatedref
27、erences,subsequentamendmentsto,orrevisionsof,anyofthesepublications applytothisEuropeanStandardonlywhenincorporatedintoitbyamendmentorrevision.Inthecaseof undatedreferencesthelatesteditionofthepublicationsreferredtoapply(includingamendments). EN340, ProtectiveclothingGeneralrequirements. ISO6487, Ro
28、advehiclesMeasurementtechniquesinimpacttestsInstrumentation 3Definition 3.1 stoneshield productdesignedtobewornunderoroverouterclothing(butnotwithoutunderclothingandnotdirectlyonthe skin)andtoprovideprotectionfromloftedstonesanddebris. Theproductconsistsmainlyofabreastguard,whichmaybeassociatedwitho
29、rincludeshoulderguardsand otherguardssuchasbicepsguardsandabackguard(seeFigure1). 4Requirements 4.1Construction Thestoneshieldshallbefittedwithtighteningorrestrainingdevicesorclosurestoallowthemtobedonned tighttothebodyassuringfreedomofmovements.Checkaccordingto6.5. 4.2Minimumprotectedareas 4.2.1Gen
30、eral TheminimumprotectedareasofthebreastguardisspecifiedinTable1andin4.2.2. 4.2.3to4.2.5areapplicablewhenotherpartsarepresent. 4.2.2 Breastguard Thebreastguardshallcovertheanteriorportionoftheribcageincludingthesternum.EN14021:2003(E) 6 4.2.3Shoulder guards Theshoulderguardsshallcoverthetopportionof
31、theshoulders. 4.2.4Biceps guards Bicepsguardsshallcovertheouterportionoftheupperarms. 4.2.5Back Guard ThebackguardshallcoversthescapulaeandaportionofthespinewithalengthcorrespondingofatleastC ofFigure2. 4.3Sizing StoneshieldsshallbemarkedonthebreastguardwiththeirsizeaccordingtoEN340exceptthatthe ref
32、erencedimensionisonlythechestgirthmeasuredonapersonintheuprightpositionandbreathing normallywiththetapemeasurepassedoverthescapulaeunderthearmpitsandacrossthechestandback. Table1givestheminimumdimensionsofabreastguardsuitedforapersonwithachestgirthof105cm. Othersizeswillbescaledtothesameproportions.
33、 Table1Dimensions Dimensions ABC Chestgirth(%) 33 19 22 Exampleofchestgirthof 105cm 35cm 22cm 23cm Thedimensions A, Band CaredefinedbelowbyreferencetoFigure2anddonotincludethepadding. Atheminimumdistancebetweentheloweredgeofthebreastguardandthemidpointofthesubjectsshoulder. Btheminimumbreadthofthebr
34、eastguardatanypoint. Ctheminimumlengthbetweenthemidpointontheupperedgeandthemidpointontheloweredgeofthebreast guard. 4.4Surfacecontinuity Thecomponentsofthestoneshieldsshallbeconstructedsothattherearenogapsthatadmitacircularprobe asdescribedin5.2. 4.5Attachments Allrigidattachmentsandstrapsaswellasf
35、astenersandadjustersshallbeabletowithstandapullingforceof 120Nwithoutfailure,whentestedaccordingto6.4. 4.6Ergonomicrequirements Stoneshieldsshallbedesignedtominimisethediscomfortofwearingthemandshallnotundulyrestrictarm movements. Roughedgesshallnotbepresentontheshells.EN14021:2003(E) 7 Apaddingelem
36、entshallbeappliedtoeachshellonanydesiredareaandcanbesewn,glued,rivetedorelse ontheinnersurfacesprovideditisnoteasilyremovedwherethepaddingislocatedontheedgesitshall extendoutwardnotlessthan0,5cmandshallhaveminimumthicknessof0,5cm.Figure3showsanexample ofapplication. Examinationshallbemadeaccordingto
37、6.2and6.5. 4.7Impactperformancerequirements Theaveragepeakforcerecordedbelowtheanvilinthetestsdescribedin6.6shallbebelow27kN.Noshell shallcrackorshatterduringthetest. 5 Testequipment 5.1Apparatus 5.1.1Dropping apparatus Theapparatusshallbesuchthatamass(hemisphericalimpactor)maybereleasedinordertodro
38、palonga guidedverticalpathontothesampleplacedonatestanvil.Thecentreofthemassofthehemispherical impactorshalllieoverthecentreofthetestanvil. NOTE TheequipmentfortestingstoneshieldscouldbecommontoanumberofEuropeanStandardssuchas EN16211. 5.1.2Hemispherical impactor Thehemisphericalimpactor,withanendra
39、diusof(12,5 0,1)mm,isattachedtoadroppingblocksothatit hasatotalmassof(1000 10)ganditskineticenergyonimpactshallbe(10 1)J. 5.1.3Anvil Theanvilshallbemadeofpolishedsteelwiththefollowingdimensions l 1 equalto(190 20)mm, l 2 equalto (100 2)mmand r 1 equalto(150 5)mm,andtheanvilshallbesurroundedbya“guard
40、ring”.Theguard ringshallhaveaninternaldiameter l 3 of(120 2)mm,awallthickness l 4 of(20 1)mm.Theguardringshall besolidlymountedtothebasearoundthepiezoelectricloadcellorforcetransducer.Thetopoftheguardring shallbe(10 0,5)mmabovethecentreofthetopoftheanvil.Figure4illustratesthedesignoftheapparatus. Th
41、eanvilshallbeattachedthroughapiezoelectricloadcellorequivalentforcetransducertoamassofat least1000kg.Theloadcellorforcetransducershallbepreloadedtothemanufacturersinstructions. 5.1.4 Forcemeasurementinstrumentation Theanvilshallbemountedsothatduringimpacttestingthewholeforcebetweentheanvilandthemass
42、ive baseoftheapparatuspassesthroughaquartzforcetransducerinlinewithitssensitiveaxis.Theforce transducershallhaveacalibratedrangeofnotlessthat50kNandalowerthresholdoflessthan0,5kN.The outputoftheforcetransducershallbeprocessedbyachargeamplifieranddisplayedandrecordedon suitableinstruments.Therecordin
43、gsystemshallshowacontinuousforcewithatimerecord,orshallhavea peakforcedetectioncapability.Digitalsamplingsystemsshallhaveaminimumrateof10kHz.Themeasuring systemincludingthedropassemblyshallhaveafrequencyresponseinaccordancewithchannelfrequency class(CFC)1000ofISO6487.EN14021:2003(E) 8 5.1.5 Toleranceanduncertainty Measuringinstrumentsortheirindependentworkingcomponentsunlessotherwisespecifiedshallbeaccurate to 2%ofthepass/faillevelofthecharacteristicbeingmeasured. Foreachoftherequiredsequencesofmeasurementsperformedinaccordancewiththisstand
