CEN TR 16043-2010 Bicycles - Replies to requests for interpretation of EN 14766《自行车 答复解释请求EN 14766》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPD CEN/TR 16043:2010Bicycles Replies to requestsfor interpretation of EN 14766PD CEN/TR 16043:2010 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementa

2、tion of CEN/TR16043:2010.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 69604 6ICS 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 16043:2010TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16043 September 2010 ICS 43.150 English Version Bicycles - Replies to requests for interpretation of EN 14766 Bicyclettes - Rponses aux demandes dinterprtation sur lEN 147

5、66 Fahrrder - Antworten auf Anfragen fr die Auslegung der EN 14766 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, Denma

6、rk, 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 NORMALISAT

7、ION 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 16043:2010: EPD CEN/TR 16043:2010CEN/TR 16043:2010 (E) 2 Contents Page Foreword 3Intro

8、duction .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 Clause 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 4.7.6.4.2 Test method (no action) 82.6 Clause 4.10.3.1 Requirement (no action) 82.7 Clause 4.10.5.2 Quick-release devices (interpretation) .82.8 Clause 4.12.3 Stage 2: Test method Radial force (interpretation) .92.9 Clause 4.14.7.1 General (no action) .92.10 Clause 4.14.7.3

10、Test method (no action) .9Bibliography . 11PD CEN/TR 16043:2010CEN/TR 16043:2010 (E) 3 Foreword This document (CEN/TR 16043:2010) 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 the elements of

11、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 16043:2010CEN/TR 16043:2010 (E) 4 Introduction This Technical Report contains replies to requests for interpretations with regard to the unders

12、tanding of clauses in EN 14766:2005. 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 overrule the text

13、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 interpretations may be

14、 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 relevant TC 33

15、3 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 of the standar

16、d; 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 is deficient i

17、n 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. Answers to requests for interpretations Since requests f

18、or 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 will itself inform the originator of the request as appropriate. Disclaimer The interpretations have been derived by th

19、e 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 16043:2010CEN/TR 16043:2010 (E) 5 should be noted that the interpretations are neither part of any standard nor have been referenced

20、in the Official Journal of the European Union. PD CEN/TR 16043:2010CEN/TR 16043:2010 (E) 6 1 Scope The purpose of this Technical Report is to provide replies to requests for interpretations of EN 14766:2005, Mountain-bicycles Safety requirements and test methods. 2 Agreed interpretations and no acti

21、on 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; brake-mechanism to frame, fork or handlebar; mud-guards to frame or fork; saddle to seat-pillar (except in EN 147

22、65). 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)? Interpretation The locking devices mentioned as examples in the standard shall not be considered to be an exhaustive list.

23、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 for locking of e.g. levers to handlebars. NOTE 2 This decision is also applicable to the corresponding clauses in

24、 the Technical Reports related to EN 14764, EN 14765 and EN 14781. REQ 004-10-2007 (Sweden) 2.2 Clause 4.6.4 Brake-block security test (no action) Question During the test the wheel will lock and the tyre will slip on the surface. A brake that does not fulfil this requirement will not fulfil the ord

25、inary brake-performance test. The test can be carried out as follows: PD CEN/TR 16043:2010CEN/TR 16043:2010 (E) 7 apply the brakes according to the standard; rotate the wheel by hand forward and rearwards five times. Is the test meaningful? Should the testing procedure be revised? Reply The test mai

26、nly 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 shall remain. REQ 005-10-2007 (Sweden) Question Can brake pad security test be performed on a brake test machine? Is

27、 it acceptable if the wheel skids? Reply Test machine can be used. The wheel is permitted to skid. See also reply to REQ 005-10-2007 (Sweden). NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14764, EN 14765 and EN 14781. REQ 026-10-2007 (Germ

28、any), REQ 033-10-2007 (Germany) 2.3 Clause 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 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

29、 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 between wet and dry? It is often difficult to prevent wheel skidding at high lever forces during wet testing (requires a very large clamping force).

30、 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 Technical Reports related to EN 14764 and EN 14781. REQ 032-10-2007 (Germany) 2.4 Clause 4.7.2 Handlebar plugs (interpretation) Question Handlebar

31、 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 hole in the plug? PD CEN/TR 16043:2010CEN/TR 16043:2010 (E) 8 Interpretation Yes. NOTE This decision is also applicable to the corresponding c

32、lauses in the Technical Reports related to EN 14764 and EN 14781. REQ 008-10-2007 (Sweden) 2.5 Clause 4.7.6.4.2 Test method (no action) Question When the handlebar is fitted with bar-ends, the tests in 4.7.6.4.2 and 4.7.6.6.2 are similar. We suggest to keep only one. Proposed answer There is only on

33、e case: apply a torque of 60 Nm (80 Nm in MTB). Reply There are two tests and they are different. There is no repetition. NOTE This decision is also applicable to the corresponding clause in the Technical Report related to EN 14764. REQ 067-10-2007 (France) 2.6 Clause 4.10.3.1 Requirement (no action

34、) Question The standard EN 14766 only specifies: “apply 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

35、is applied once at each location mentioned (once on 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 14781. REQ 051-10-2007 (F

36、rance) 2.7 Clause 4.10.5.2 Quick-release devices (interpretation) Question The Note “It is 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. PD C

37、EN/TR 16043:2010CEN/TR 16043:2010 (E) 9 Interpretation The present text is correct. The requirement applies to cases where secondary 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 cl

38、auses in the Technical Reports related to EN 14764 and EN 14781. REQ 016-10-2007 (Sweden) 2.8 Clause 4.12.3 Stage 2: Test method Radial force (interpretation) Question According to 4.12.3 of EN 14764:2005 and EN 14766 (Mudguards Stage 2: Test method radial force), the force shall be applied 20 mm fr

39、om the free end of the mudguard. Many mudguards will have a rubber “mud flap“ attached to the free end of the mudguard. Where shall the force be applied if such a flap is mounted? Interpretation Mudguards: the force shall be applied 20 mm from the end of the actual mudguard (not taking the flap into

40、 consideration). However, any mud-flap shall be mounted during the test. NOTE This decision is also applicable to the corresponding clause in the Technical Report related to EN 14764. REQ 072-05-2008 (Sweden) 2.9 Clause 4.14.7.1 General (no action) Question In the EN 14766 the following note is miss

41、ing which is in the standard EN 14764: NOTE If a seat-pillar survives the test described in 4.14.6.3 with the test force applied 70 mm or more behind the centre of the clamp, there is no need to conduct this test. Reply This note is in EN 14764 because the forces in both tests 4.14.7.1 and 4.14.6.3

42、are the same. This is not the case in EN 14766 and therefore it is correct, that this note is not in EN 14766. NOTE This decision is also applicable to the corresponding clause in the Technical Report related to EN 14764. REQ 056-10-2007 (France) 2.10 Clause 4.14.7.3 Test method (no action) Question

43、 Should the test be performed with or without the saddle clamping system? Reply The test method is clear because of the following text: “Secure an extension-bar to the saddle attachment point by the appropriate attachment fitting such that the bar extends rearwards and downwards.“. PD CEN/TR 16043:2

44、010CEN/TR 16043:2010 (E) 10 NOTE This decision is also applicable to the corresponding clause in the Technical Report related to EN 14781. REQ 060-10-2007 (France) PD CEN/TR 16043:2010CEN/TR 16043:2010 (E) 11 Bibliography 1 EN 14766:2005, Mountain-bicycles Safety requirements and test methods 2 EN 1

45、4765, Bicycles for young children Safety requirements and test methods 3 EN 14764, City and trekking bicycles Safety requirements and test methods 4 EN 14781, Racing bicycles Safety requirements and test methods This page deliberately left blankThis page deliberately left blankBSI is the independent

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