ISO INTERNATIONAL STANDARD 14120 Second edition 2015-11-01 Safety of machinery Guards - General requirements for the design and construction of fixed and movable guards Sécurité des machines-ProtecteursPrescriptionsgénéralespour la conception et la construction des protecteurs fixes et mobiles Reference number ISO 14120:2015(E) SO International Organization for Standardization @ IS0 2015 HEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS IS0 14120:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Intenationaibr PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZoISQ s1.5 - All rights reserved etworking permitted without license from IHS IS0 14120:2015(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Risk assessment. ..8 5 General requirements for the design and construction of guards 5.1 Machine aspects. .8 5.1.1 General. ..8 5.1.2 Access to hazard zones .8 5.1.3 Containment of ejected parts and other impacts 5.1.4 Containment of hazardous substances. .9 5.1.5 Noise. .9 5.1.6 Radiation .9 5.1.7 Potentially explosive atmosphere .9 5.2 Human aspects .9 5.2.1 General .9 5.2.2 Safety distances .9 5.2.3 Control of access to the hazard zone 9 5.2.4 Viewing.. ..10 5.2.5 Ergonomic aspects ..10 5.2.6 Intendeduse .10 5.3 Guard design and construction aspects. .11 5.3.1 General. .11 5.3.2 Crushing or trapping points ..11 5.3.3 Durability .11 5.3.4 Hygiene .11 5.3.5 Cieaning .11 5.3.6 Exclusion of contaminants 11 5.3.7 Sharp edges, etc.. .11 5.3.8 Integrity of joints ..11 5.3.9 Removal of fixed guards .11 5.3.10 Mounting of removable fixed guards ..12 5.3.11 Adjustable guards .12 5.3.12 Movable guards. ..12 5.3.13 Closed position of movable guards .12 5.3.14 Interlocking guards with a start function (control guards) .12 5.4 Materials, rigidity, and impact requirements .13 5.4.1 General .13 5.4.2 Impact and ejection resistance. ..13 5.4.3 Rigidity. .13 5.4.4 Securefixing ..13 5.4.5 Reliability of moving parts ..13 5.5 Containment .13 5.6 Resistance to corrosion .13 5.7 Resistance to microorganisms. ..13 5.8 Non-toxicity .14 5.9 Machine viewing .14 5.10 Transparency ..14 5.11 Shadows and stroboscopic effects ..14 5.12 Electrostatic properties. ..14 5.13 Guards with electrically conductive parts ..14 iii ISee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ithout license from IHS Not for Resale, 2016/1/8 02:00:5