ISO INTERNATIONAL STANDARD 21281 First edition 2005-02-15 Constructionandlayout ofpedals of self-propelled sit-down rider-controlled industrial trucks Rules for the construction and layout of pedals Construction etconfiguration despédales des chariots demanutention automoteurs aconducteurs assis-Reglesde constructionetde configurationdespedales Reference number ISO 21281:2005(E) ii Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approvalbyat least75%of thememberbodies castinga vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO21281 was prepared by the European Committee for Standardization (CEN)Technical Committee CEN/TC150,Industrialtrucks-Safety,in collaborationwithTechnical CommitteeISO/TC110,Industrial trucks, Subcommittee Sc 2, Safety of powered industrial trucks, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). ii Introduction The use of industrial trucks differs essentially from that of road vehicles, which are mainly driven in the forward direction.Industrialtrucks,especiallyforklifttrucksasworkingmachines,have a high share of movement in the backward direction, 一 frequent change of direction of movement, and relatively lowspeed. with optimized controls. In certain types of driving units (e.g. hydrostatic, electrical), the driving mechanism alsoactsasabrake This International Standard covers the most frequently used pedal layouts. Other pedal arrangements for travellingarepossibleprovidedthatthenew ergonomicresultsareconsidered. iv Construction and layout of pedals of self-propelled sit-down rider-controlledindustrialtrucksRulesfortheconstruction and layout of pedals 1 Scope This International Standard specifies the layout of pedals of self-propelled sit-down rider-controlled industrial trucks, as defined in Parts 1, 2, 3 and 6 of ISO 3691. 2Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)applies. Iso3691-2,Industrial trucks-Safety requirements and verification-Part 2:Self-propelled variable-reach trucks Iso 3691-3,Industrial trucks-Safety requirements and verification-Part 3:Additional requirements for Iso3691-6,Industrial trucks-Safety requirements and verification-Part 6:Burden andpersonnel carriers 3Terms and definitions For the purposes of this document, the following terms and definitions apply. NOTE The forward direction of travel is defined in ISO 3691-1:—, Annex A. 3.1 pedal exclusivelyfoot-operated control 3.2 service brake pedal pedal controlling the service brake 3.3 clutch pedal pedal controlling the engagement of the engine to the transmission NOTE 1)To be published. (Revision of ISO 3691:1980) 1 3.4 inching pedal NOTE The final movement applies the service brakes 3.5 acceleratorpedal pedal controlling the rotational speed of the engine or motor NOTE It may, where applicable, control the transmission ratio and/or the direction of travel. 3.6 direction-control pedal pedal controlling the direction of travel only Requirements efforts and a small number of operations, taking ergonomic principles into consideration. allowing braking of the left and right wheels separately or both together. If a combined brake pedal for inching and braking is used, it shall be capable of being operated with the