FINAL INTERNATIONAL ISO/FDIS DRAFT STANDARD 7176-28 ISO/TC173/SC1 Wheelchairs - Secretariat: SABS Voting begins on: Part 28: 2012-06-05 Requirements and test methods for stair- Voting terminates on: climbing devices 2012-08-05 Fauteuils roulants- Partie 28: Exigences et methodes d'essai pour les dispositifs monte- escalier RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEYAREAWAREANDTOPROVIDESUPPOR TING DOCUMENTATION IN ADDITIONTOTHEIREVALUATIONAS Reference number BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO- (OGICAL, COMMERCIAL AND USER PURPOSES ISO/FDIS 7176-28:2012(E) DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE DARDS TOWHICH REFERENCE MAY BE MADE IN ISO2012 IHS unde t license from IHS Not for Resale ISO/FDIS 7176-28:2012(E) Copyright notice This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under the applicable laws of the user's country, neither this Iso draft nor any extract from it may be reproduced, or otherwise, without prior written permission being secured. Requests for permission to reproduce should be addressed to either IsO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 412274909 47 E-mail copyright@iso.org Web www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted. IsO 2012-All rights reserved rmitted without license from IHS Not for Resale ISO/FDIS7176-28:2012(E) Contents Page Foreword Introduction ..vili 1 Scope. 1 2 Normative references.. 1 3 Terms and definitions.. 4 Application of reference standards... .13 4.1 Use of a stair-climbing device in driving mode.. .13 4.2 Use of a stair-climbing device in other operational modes. 14 5 Requirements. 14 5.1 General 14 5.2 Skew angle...... 14 5.3 Effectiveness of brakes. 15 5.4 Static stability. 15 5.5 Dynamic stability 16 5.6 Direct operating forces 16 5.7 Step transition safety... 16 5.8 Static, impact and fatigue strength 16 5.9 Climatic tests.... 17 5.10 Flammability 17 5.11 Electromagnetic compatibility 17 5.12 Safe operation as the battery becomes depleted 17 5.13 Safety equipment. 17 5.14 Ergonomic aspects 18 6 Test apparatus. 18 L Preparation of the stair-climbing device for testing 23 7.1 General 23 7.2 Equipment .. 23 7.3 Adjustments. 23 7.4 Batteries. 23 7.5 Tyre inflation 23 7.6 Powerswitch 23 7.7 Speed setting... 23 7.8 Loading of stair-climbing devices 24 7.9 Adaptation of the body support system. 25 7.10 Exaggerated test set-up.. 25 8 Test conditions. .25 9 Skew angle. .25 9.1 Principle... 25 9.2 Test method. 25 9.3 Evaluation of results 26 9.4 Test report 27 10 Effectiveness of brakes. 28 10.1 Principle. 28 10.2 Test method .28 10.3 Test report .30 11 Static stability .30 11.1 Principle.... 30 11.2 Test methods 30 11.3 Test report 32 12 Dynamic stability 33 ili ted withoutlicensefrom IHS Not for Resale