CEN TR 16041-2010 Bicycles - Replies to requests for interpretation of EN 14764《自行车 答复解释请求EN 14764》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPD CEN/TR 16041:2010Bicycles Replies to requestsfor interpretation of EN 14764PD CEN/TR 16041:2010 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementa

2、tion of CEN/TR16041:2010.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 69602 2ICS 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 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 dinterprtation sur lEN 147

5、64 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, 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 16041:2010: EPD CEN/TR 16041:2010CEN/TR 16041:2010 (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 Clauses 4.6.8.5.3.6 and 4.6.8.5.3.7 III a) Dry and wet brake performance (no action).72.4 Clause 4.7.2 Handlebar plu

9、gs (interpretation) 72.5 Clause 4.8.x Frame Fatigue test with horizontal forces (no action) 82.6 Clause 4.10.3.1 Requirement (no action) 82.7 Clauses 4.10.4.4 2) the rationale of the standard; 3) the history of the standard. b) A no action decision This is applicable when it is agreed that the stand

10、ard 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 in this Technical Report, which wil

11、l 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 that the member body will keep itsel

12、f 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 guidance only and does not reflect the f

13、ormal approval by CEN or CEN member bodies. It PD CEN/TR 16041:2010CEN/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 16041:2010CEN/TR 16041:2010 (E) 6 1 Scope The purpose

14、 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) Question According to the text, loc

15、king 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 stem; seat pillar to frame; luggage ca

16、rrier 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 that they do not unintentionally becom

17、e 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. REQ 004-10-2007 (Sweden) 2.2 Claus

18、e 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 follows PD CEN/TR 16041:2010CEN/TR 16041

19、: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 brake test machine? Is it acceptable if

20、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. The test shall remain. NOTE This deci

21、sion 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 testing? 4.6.8.5.3.6 says that suffi

22、cient 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 and dry? It is often difficult to prev

23、ent 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 Reports related to EN 14766 and EN 147

24、81. 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 the plug? Interpretation Yes. PD CEN

25、/TR 16041:2010CEN/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) Question These clauses specify a bicycle

26、 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 is it an error. Reply This is intenti

27、onal. 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 the contrary EN 14781 states: “once at

28、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 load is applied on the sprocket side. NO

29、TE 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 Note “It is recommended that it be possib

30、le“ 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 devices are not present. If the

31、y are present, the recommendation is that the same requirement is applied. PD CEN/TR 16041:2010CEN/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 (Sweden) 2.8 Clause 4.12.3 Stage 2: Tes

32、t 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 mm from the edge of the guard they hav

33、e 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 flap comes in contact with the wheel.

34、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 free end of the mudguard. Where shall t

35、he 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 test. NOTE This decision is also applicab

36、le 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 together. 4.14.7 specifies a similar fa

37、tigue 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 the note regarding the seat pillar test

38、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 tests do not replace each other. REQ 001-11

39、-2006 (UK) PD CEN/TR 16041:2010CEN/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 force applied 70 mm or more behind the ce

40、ntre 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 This decision is also applicable to the

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

42、ethods 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 preparing British Standardsand other stand

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