BS PD CEN TR 16041-2010 Bicycles — Replies to requests nfor interpretation of EN 14764《自行车 有关EN 14764标准说明请求的回复》.pdf

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1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication PD CEN/TR 16041:2010 Bicycles Replies to requests for interpretation of EN 14764PD CEN/TR 16041:2010 PUBLISHED DOCUMENT National foreword This Published Document is the UK imp

2、lementation of CEN/TR 16041:2010. The UK participation in its preparation was entrusted to Technical Committee GME/25, Cycles. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions

3、of a contract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 69602 2 ICS 43.150 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 3

4、1 October 2010. Amendments issued since publication Date Text affectedPD CEN/TR 16041:2010TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16041 September 2010 ICS 43.150 English Version Bicycles - Replies to requests for interpretation of EN 14764 Bicyclettes - Rponses aux demandes din

5、terprtation sur lEN 14764 Fahrrder - Antworten auf Anfragen fr die Auslegung der EN 14764 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

6、, Czech Republic, Denmark, 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 COMI

7、T EUROPEN DE NORMALISATION 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 16041:2010: EPD CEN/TR 16041:2010 CEN/TR 16041:2010 (E) 2 Conte

8、nts Page Foreword 3 Introduction .4 1 Scope 6 2 Agreed interpretations and no action decisions 6 2.1 Clause 4.3.1 Security of screws (interpretation) 6 2.2 Clause 4.6.4 Brake-block security test (no action) .6 2.3 Clauses 4.6.8.5.3.6 and 4.6.8.5.3.7 III a) Dry and wet brake performance (no action).7

9、 2.4 Clause 4.7.2 Handlebar plugs (interpretation) 7 2.5 Clause 4.8.x Frame Fatigue test with horizontal forces (no action) 8 2.6 Clause 4.10.3.1 Requirement (no action) 8 2.7 Clauses 4.10.4.4 2) the rationale of the standard; 3) the history of the standard. b) A no action decision This is applicabl

10、e 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 in some way. NOTE The interpretations and no-action decisions are published i

11、n 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 for interpretations are submitted through a CEN member body, it is assumed th

12、at 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 the Interpretation Panel Group. The information contained herein is for guidan

13、ce only and does not reflect the formal approval by CEN or CEN member bodies. It PD CEN/TR 16041:2010 CEN/TR 16041:2010 (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 16041:2010 CEN/TR

14、16041:2010 (E) 6 1 Scope The purpose of this Technical Report is to provide replies to requests for interpretations of EN 14764:2005, City and trekking bicycles Safety requirements and test methods. 2 Agreed interpretations and no action decisions 2.1 Clause 4.3.1 Security of screws (interpretation)

15、 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 14765). The requirement does not apply to: handlebar to handlebar st

16、em; 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. Also other means of locking devices can be acceptable provided th

17、at 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 the Technical Reports related to EN 14765, EN 14766 and EN 14781

18、. 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 ordinary brake-performance test. The test can be carried out as foll

19、ows PD CEN/TR 16041:2010 CEN/TR 16041:2010 (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? REQ 005-10-2007 (Sweden) Question Can brake pad security test be performed on a bra

20、ke test machine? Is it acceptable if the wheel skids? REQ 026-10-2007 (Germany), REQ 033-10-2007 (Germany) 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.

21、The test shall remain. NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14765, EN 14766 and EN 14781. 2.3 Clauses 4.6.8.5.3.6 and 4.6.8.5.3.7 III a) Dry and wet brake performance (no action) Question What clamping force is required for machine

22、 testing? 4.6.8.5.3.6 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 (4.6.8.5.3.7 III a). Is there a difference in requirements between wet a

23、nd 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 Technical R

24、eports related to EN 14766 and EN 14781. 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 hole in

25、 the plug? Interpretation Yes. PD CEN/TR 16041:2010 CEN/TR 16041:2010 (E) 8 NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14766 and EN 14781. REQ 008-10-2007 (Sweden) 2.5 Clause 4.8.x Frame Fatigue test with horizontal forces (no action) Qu

26、estion These clauses specify a bicycle frame fatigue test to be carried out by applying a horizontal force between the front and rear fork drop-outs. This test is not specified in EN 14764 although all the other tests applied to the frame are present. Could you confirm whether this is intentional or

27、 is it an error. Reply This is intentional. The test is only applicable for certain shapes of frames in EN 14766 and EN 14781. REQ 002-11-2006 (UK) 2.6 Clause 4.10.3.1 Requirement (no action) Question The standard EN 14766 only specifies: “apply a static force of 370 N at one point on the rim“. On t

28、he 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 the spoke and once between two consecutive spokes). The lo

29、ad is applied on the sprocket side. NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14765, EN 14766 and EN 14781. REQ 051-10-2007 (France) 2.7 Clauses 4.10.4.4 & 4.10.5.2 Wheel retention/Quick-release devices (interpretation) Question The Not

30、e “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. Interpretation The present text is correct. The requirement applies to cases where sec

31、ondary devices are not present. If they are present, the recommendation is that the same requirement is applied. PD CEN/TR 16041:2010 CEN/TR 16041:2010 (E) 9 NOTE This decision is also applicable to the corresponding clauses in the Technical Reports related to EN 14766 and EN 14781. REQ 016-10-2007

32、(Sweden) 2.8 Clause 4.12.3 Stage 2: Test method Radial force (interpretation) Question What happens if there is a mud flap on the fender that is made of rubber? Proposed answer The mudguards with mud flaps that we have tested have all been plastic guards. When we have tested them at a distance of 20

33、 mm from the edge of the guard they have not passed the requirements. We do not take the mud flap into account when deciding where to apply the force (we apply it 20 mm from the end of the actual guard) if the flap is designed and “angled“ so that the guard comes in contact with the wheel before the

34、 flap comes in contact with the wheel. REQ 070-04-2008 (Germany) 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 from the free end of the mudguard. Many mudguards will have a rubber “mud flap“ attached to the

35、free end of the mudguard. Where shall the force be applied if such a flap is mounted? REQ 072-05-2008 (Sweden) Interpretation Mudguards: The force shall be applied 20 mm from the end of the actual mudguard (not taking the flap into consideration). However, any mud-flap shall be mounted during the te

36、st. NOTE This decision is also applicable to the corresponding clause in the Technical Report related to EN 14766. 2.9 Clauses 4.14.6 and 4.14.7 Saddle and seat-pillar clamp Fatigue test (no action) Question 4.14.6 specifies a fatigue test to be carried out on the bicycle seat and seat-pillar clamp

37、together. 4.14.7 specifies a similar fatigue test to be carried out on the seat-pillar alone. 4.14.7 includes a note stating that if a seat pillar survives the test specified in 4.14.6, there is no need to conduct the test specified in 4.14.7. The other EN bike standards include the same tests but t

38、he note regarding the seat pillar test not being necessary is not present. Can you confirm if this note is intended to be present in all four standards? Reply The reason for the note in EN 14764 is that the forces in the two tests are the same. In the other standards this is not the case so the test

39、s do not replace each other. REQ 001-11-2006 (UK) PD CEN/TR 16041:2010 CEN/TR 16041:2010 (E) 10 2.10 Clause 4.14.7.1 General (no action) Question In EN 14766 the following note is missing which is in the standard EN 14764: NOTE If a seat-pillar survives the test described in 4. 14.6.3 with the test

40、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 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

41、 This decision is also applicable to the corresponding clause in the Technical Report related to EN 14766. REQ 056-10-2007 (France) PD CEN/TR 16041:2010 CEN/TR 16041:2010 (E) 11 Bibliography 1 EN 14764:2005, City and trekking bicycles Safety requirements and test methods 2 EN 14765, Bicycles for you

42、ng children Safety requirements and test methods 3 EN 14766, Mountain-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 national body responsible for

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