1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPD CEN/TR 16044:2010Bicycles Replies to requestsfor interpretation of EN 14781PD CEN/TR 16044:2010 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementa
2、tion of CEN/TR16044:2010.The UK participation in its preparation was entrusted to TechnicalCommittee GME/25, Cycles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract.
3、 Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 69605 3ICS 43.150Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 October 2010.Amendm
4、ents issued since publicationDate Text affectedPD CEN/TR 16044:2010TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16044 September 2010 ICS 43.150English Version Bicycles - Replies to requests for interpretation of EN 14781 Bicyclettes - Rponses aux demandes dinterprtation sur lEN 1478
5、1 Fahrrder - Antworten auf Anfragen fr die Auslegung der EN 14781 This Technical Report was approved by CEN on 29 May 2010. It has been drawn up by the Technical Committee CEN/TC 333. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmar
6、k, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATI
7、ON EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TR 16044:2010: EPD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 2 Contents Page Foreword 3Introd
8、uction .41 Scope 62 Agreed interpretations and no action decisions 62.1 Clause 4.3.1 Security of screws (interpretation) 62.2 Clause 4.6.4 Brake-block security test (no action) .62.3 Clauses 4.6.7.5.2.6 and 4.6.7.5.2.7 Dry and wet brake performance (no action) .72.4 Clause 4.7.2 Handlebar plugs (int
9、erpretation) 72.5 Clause 4.7.6.2.3 Test method (interpretation) .82.6 Clause 4.8.x Frame Fatigue test with a vertical force (no action) 82.7 Clause 4.10.3.1 Requirement (no action) 82.8 Clause 4.10.3.2 Test method (no action) .92.9 Clause 4.10.4.4 Wheel retention (interpretation) 92.10 Clause 4.13.7
10、.3 Requirement for stage 2 (no action) .9Bibliography . 10PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 3 Foreword This document (CEN/TR 16044:2010) has been prepared by Technical Committee CEN/TC 333 “Cycles”, the secretariat of which is held by UNI. Attention is drawn to the possibility that some of t
11、he elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 4 Introduction This Technical Report contains replies to requests for interpretations with regar
12、d to the understanding of clauses in EN 14781:2005. The replies concern those requests which have resulted in an interpretation, or a decision that no action is required as the standard is sufficiently clear. An interpretation does not have the same status as the text of the standard, nor can it ove
13、rrule the text of the standard. However, following an interpretation should give assurance that the relevant clause of the standard has been correctly applied. An interpretation shall only be regarded as a clarification of the meaning of the standard. Requests for interpretation Requests for interpr
14、etations may be submitted by a CEN member body through its national committee or by a CEN/TC 333 liaison (but not directly by an individual or a company) in accordance with the interpretation protocols agreed by CEN/TC 333 and resumed in Doc. CEN/TC 333 N 182. The requests are then channelled to the
15、 relevant TC 333 working party which will deal with the request. A request for an interpretation may lead to: a) An interpretation of the standard This should reflect a reasonable interpretation of how the standard should be used, taking into account: 1) the wording of the standard; 2) the rationale
16、 of the standard; 3) the history of the standard. b) A no action decision This is applicable when it is agreed that the standard appropriately specifies how a cycle or a component shall be assessed. c) A proposal for an amendment of the standard This is applicable when it is agreed that the standard
17、 is deficient in some way. NOTE The interpretations and no-action decisions are published in this Technical Report, which will be updated on a regular basis. Proposals for amendments will be progressed as new work item proposals in accordance with CEN rules. Proposals for amendments will be progress
18、ed as new work item proposals in accordance with CEN rules. Answers to requests for interpretations Since requests for interpretations are submitted through a CEN member body, it is assumed that the member body will keep itself informed about decisions concerning the request and its progress and wil
19、l itself inform the originator of the request as appropriate. Disclaimer The interpretations have been derived by the Interpretation Panel Group. The information contained herein is for guidance only and does not reflect the formal approval by CEN or CEN member bodies. It PD CEN/TR 16044:2010CEN/TR
20、16044:2010 (E) 5 should be noted that the interpretations are neither part of any standard nor have been referenced in the Official Journal of the European Union. PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 6 1 Scope The purpose of this Technical Report is to provide replies to requests for interpreta
21、tions of EN 14781:2005, Racing bicycles Safety requirements and test methods. 2 Agreed interpretations and no action decisions 2.1 Clause 4.3.1 Security of screws (interpretation) Question According to the text, locking devices are required for the following: suspension system; generator attachment;
22、 brake-mechanism to frame, fork or handlebar; mud-guards to frame or fork; saddle to seat-pillar (except in EN 14765). The requirement does not apply to: handlebar to handlebar stem; seat pillar to frame; luggage carrier to frame or fork. What is a locking device (thread locking compound)? Interpret
23、ation The locking devices mentioned as examples in the standard shall not be considered to be an exhaustive list. Also other means of locking devices can be acceptable provided that they do not unintentionally become unlocked. NOTE 1 Thread locking compound was discussed and considered as acceptable
24、 for locking of e.g. levers to handlebars. NOTE 2 This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14764, EN 14765 and EN 14766. REQ 004-10-2007 (Sweden) 2.2 Clause 4.6.4 Brake-block security test (no action) Question During the test the wheel will
25、 lock and the tyre will slip on the surface. A brake that does not fulfil this requirement will not fulfil the ordinary brake-performance test. The test can be carried out as follows: PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 7 apply the brakes according to the standard; rotate the wheel by hand for
26、ward and rearwards five times. Is the test meaningful? Should the testing procedure be revised? Reply The test mainly aims at checking if the brake-pad can be released when the bicycle is moved backwards with the brakes applied. This situation will not occur during the other brake tests. The test sh
27、all remain. NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14764, EN 14765 and EN 14766. REQ 005-10-2007 (Sweden) 2.3 Clauses 4.6.7.5.2.6 and 4.6.7.5.2.7 Dry and wet brake performance (no action) Question What clamping force is required for
28、machine testing? 4.6.7.5.2.6 says that sufficient force must be applied to prevent skidding. Then the test should stop if a lever force of 180 N is reached, or a braking force of 700 N but the test can be stopped if the wheel locks up (4.6.7.5.2.7 III a). Is there a difference in requirements betwee
29、n wet and dry? It is often difficult to prevent wheel skidding at high lever forces during wet testing (requires a very large clamping force). Reply There is no limit to the force. It can be increased to prevent skidding. NOTE This decision is also applicable to the corresponding clauses in the Tech
30、nical Reports related to EN 14764 and EN 14766. REQ 032-10-2007 (Germany) 2.4 Clause 4.7.2 Handlebar plugs (interpretation) Question Handlebar grips are no problem to test. For plugs it is difficult to apply 70 N without coming into contact with the handlebar. Should it be permitted e.g. to drill a
31、hole in the plug? Interpretation Yes. NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14764 and EN 14766. REQ 008-10-2007 (Sweden) PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 8 2.5 Clause 4.7.6.2.3 Test method (interpretation) Question In this
32、test procedure it is to apply a vertical force of 1 000 N. But there is no requirement for maintaining of the force. Proposed answer Maintain the force for 1 min. Interpretation Force to be applied for 1 min. REQ 071-04-2008 (Germany) 2.6 Clause 4.8.x Frame Fatigue test with a vertical force (no act
33、ion) Question These clauses specify a bicycle frame fatigue test to be carried out by applying a vertical force at the seat pin with the rear drop-outs secure and a suitable roller at the front axle. This test is not specified in EN 14781 although all the other tests applied to the frame are present
34、. Could you confirm whether this is intentional or is it an error. Reply This is intentional. The test is only applicable decision for certain shapes of frames in EN 14764 and EN 14766. REQ 003-11-2006 (UK) 2.7 Clause 4.10.3.1 Requirement (no action) Question The standard EN 14766 only specifies: “a
35、pply a static force of 370 N at one point on the rim“. On the contrary EN 14781 states: “once at one spoke and once between two spokes“. We suggest to use the method mentioned in EN 14781 for all types of bicycles. Reply Standard is clear: the load is applied once at each location mentioned (once on
36、 the spoke and once between two consecutive spokes). The load is applied on the sprocket side. NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14764, EN 14765 and EN 14766. REQ 051-10-2007 (France) PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 9
37、2.8 Clause 4.10.3.2 Test method (no action) Question There are some points in this test method which are not clear: Have the load been applied once or twice? At which places of the wheel do the loads have to be applied? Do the loads have to be applied on one side of the wheel or on both? Reply The s
38、tandard is clear. The load of 250 N has to be applied two times. Once at one spoke and once between two spokes. In case of a rear wheel the load has to be applied at the sprocket side of the wheel. REQ 020-10-2007 (Germany) 2.9 Clause 4.10.4.4 Wheel retention (interpretation) Question The Note “It i
39、s recommended that it be possible“ is sometimes in the wheel retention clause and sometimes in the quick-release clause. In both cases the note is difficult to understand in relation to the text in clauses. Interpretation The present text is correct. The requirement applies to cases where secondary
40、devices are not present. If they are present, the recommendation is that the same requirement is applied. NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14764 and EN 14766. REQ 016-10-2007 (Sweden) 2.10 Clause 4.13.7.3 Requirement for stage
41、2 (no action) Question Should the stage 2 fatigue test of the seat-pillar be done with or without a saddle clamp system? Reply In the test method 4.13.7.4 it is clearly mentioned that a repeated, rearward force of 900 N shall be applied perpendicular to the main axis of the seat pillar. For a straig
42、ht pillar, the force shall be applied through the centre of the saddle clamp (see Figure 45a), and for a pillar with a horizontal extension, the force shall be applied through the intersection of the axis of the main tube and the extension (see Figure 45b) and c). NOTE This decision is also applicab
43、le to the corresponding clause in the Technical Report related to EN 14766. REQ 060-10-2007 (France) PD CEN/TR 16044:2010CEN/TR 16044:2010 (E) 10 Bibliography 1 EN 14781:2005, Racing bicycles Safety requirements and test methods 2 EN 14765, Bicycles for young children Safety requirements and test me
44、thods 3 EN 14764, City and trekking bicycles Safety requirements and test methods 4 EN 14766, Mountain-bicycles Safety requirements and test methods This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publicatio
45、ns, information and services. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.British Standards Institution (BSI)raising standards worldwideBSI Group Headquarters389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (
46、0)20 8996 Standards are updated by amendment or revision. Users of British Stan-dards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and serv-ices. We would be grateful if anyone finding an inaccuracy or ambi
47、guity whileusing this British Standard would inform the Secretary of the technical com-mittee responsible, the identity of which can be found on the inside frontcover.Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001BSI offers Members an individual updating service called PLUS which ensuresthat subs
48、cribers automatically receive the latest editions of standards.Tel: +44 (0)20 8996 7669 Fax: +44 (0)20 8996 7001Email: Buying standardsYou may buy PDF and hard copy versions of standards directly using acredit card from the BSI Shop on the website addition all orders for BSI, international and fore
49、ign standards publicationscan be addressed to BSI Customer Services.Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001Email: In response to orders for international standards, it is BSI policy tosupply the BSI implementation of those that have been publishedas British Standards, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, Europ
