EN 786-1996 en Garden equipment - Electrically powered walk-behind and hand-held lawn trimmers and lawn edge trimmers - Mechanical safety (Incorporates Amendment A2 2009)《农业和林业机械的安.pdf

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1、BRITISH STANDARD BS EN 786:1996 +A2:2009 Garden equipment Electrically powered walk-behind and hand-held lawn trimmers and lawn edge trimmers Mechanical safety ICS 65.060.70 Incorporating corrigendum August 1996 National foreword This British Standard is the UK implementation of EN 786:1996+A2:2009,

2、 incorporating corrigendum August 1996. It supersedes BS EN 786:1996 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amend

3、ment A1 is indicated by !“. The UK participation in its preparation was entrusted to Technical Committee AGE/20, Powered lawn and garden equipment. 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

4、necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. BS EN 786:1996+A2:2009 This British Standard, having been prepared under the direction of the Engineering Sector Board, was publish

5、ed under the authority of the Standards Board and comes into effect on 15 November 1996 BSI 2010 Amendments/corrigenda issued since publication Amd. No. Date Comments 13221 September 2001 Implementation of CEN amendment A1:2001 31 January 2010 Implementation of CEN amendment A2:2009 ISBN 978 0 580 6

6、2060 7 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 786:1996+A2 October 2009 ICS 65.060.70 Supersedes EN 786:1996 English Version Garden equipment - Electrically powered walk-behind and hand- held lawn trimmers and lawn edge trimmers - Mechanical safetyMatriel de jardinage - Coupe gazon et c

7、oupe-bordures lectriques portatifs et conducteur pied - Scurit mcanique Gartengerte - Elektrisch betriebene handgefhrte und handgehaltene Rasentrimmer und Rasenkantentrimmer - Mechanische Sicherheit This European Standard was approved by CEN on 20 April 1996 and includes Corrigendum 1 issued by CEN

8、on 12 August 1996, Amendment 1 approved by CEN on 4 February 2001 and Amendment 2 approved by CEN on 10 August 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without an

9、y alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made

10、by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France

11、, 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 NORMALISATION EUROPISCHES KOMITEE FR N

12、ORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 786:1996+A2:2009: EEN 786:1996+A2:2009 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 4 2 Normative references

13、 4 3 Definitions 5 4 Safety requirements and/or measures 6 4.1 Handling 6 4.2 Protection of power driven transmission parts (other than the cutting means) .7 4.3 Guard attachment 7 4.4 Controls 7 4.5 Cutting means 7 4.6 Guarding of cutting means .8 4.7 Mechanical strength and rigidity 8 4.8 Vibratio

14、n 12 4.9 Noise 13 5 Information for use . 14 5.1 Instruction handbook . 14 5.2 Marking 15 Annex A (normative) List of hazards 17 Annex B (normative) Calculation of kinetic energy 21 Annex C (informative) Acceptable symbols for machine marking 22 Annex D (normative) ! ! ! !Vibration“ “ “ “ 23 Annex E

15、 (normative) Noise test code Engineering method (grade 2) . 26 Annex F (informative) # # # #Example of a material and construction fulfilling the requirements for an artificial surface$ $ $ $ . 31 Annex ZA (informative) # # # #Relationship between this European Standard and the Essential Requirement

16、s of EU Directive 98/37/EC$ $ $ $ 33 Annex ZB (informative) # # # #Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC$ $ $ $ 34 Bibliography . 35 BS EN 786:1996+A2:2009EN 786:1996+A2:2009 (E) 3 Foreword This document (EN 786:1996+A2:2009) has been p

17、repared by Technical Committee CEN/TC 144 “Tractors and machinery for agriculture and forestry”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 20

18、10, and conflicting national standards shall be withdrawn at the latest by April 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights.

19、 This European Standard was approved by CEN on 20 April 1996 and includes Corrigendum 1 issued by CEN on 12 August 1996, Amendment 1 approved by CEN on 4 February 2001 and Amendment 2 approved by CEN on 10 August 2009. This document supersedes EN 786:1996. The start and finish of text introduced or

20、altered by amendment is indicated in the text by tags !“ and # $. The modifications of the related CEN Corrigendum have been implemented at the appropriate places in the text and are indicated by the tags . #This document has been prepared under a mandate given to CEN by the European Commission and

21、the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document.$ The Annex A is normative and contains the “List of hazards“. According to the CEN/CENELEC

22、 Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour

23、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 786:1996+A2:2009EN 786:1996+A2:2009 (E) 4 Introduction The extent to which hazards are covered is indicated in the scope of this standard. In addition machinery shall co

24、mply as appropriate with EN 292 for hazards which are not covered by this standard. The electrical safety aspects of lawn trimmers and lawn edge trimmers will be covered by a standard presently under development by CLC/TC 61F. Walk-behind machines with metal cutting elements or cutting elements with

25、 greater than 10 J kinetic energy will be covered by a standard presently under development by CEN/TC 144/WG 7. 1 Scope This European Standard specifies mechanical safety requirements and testing for the design and construction of electrically powered walk-behind and hand-held lawn trimmers and lawn

26、 edge trimmers, with cutting element(s) of non-metallic filament line or freely pivoting non-metallic cutter(s) with a kinetic energy of not more that 10 J each, and used by a standing operator primarily for cutting grass. It describes methods for the elimination or reduction of hazards arising from

27、 their use. In addition, it specifies the type of information to be provided by the manufacturer on safe working practices. This standard is not applicable to: a) Scissor type or lawn trimmers and lawn edge trimmers with cutting means other than those described above; b) Self-propelled lawn trimmers

28、 or lawn edge trimmers; c) Lawn trimmers or lawn edge trimmers which do not have a distance of at least 600 mm between the cutting means control and the cutting head. The electrical aspects of electrically powered lawn trimmers and lawn edge trimmers are not covered by this standard. The list of sig

29、nificant hazards dealt with in this standard is given in annex A. Annex A also indicates the hazards which have not been dealt with. Environmental aspects have not been considered in this standard. This European Standard applies primarily to machines which are manufactured after the date of issue of

30、 this standard. NOTE The method of calculating the kinetic energy for the purposes of this standard is given in annex B. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropri

31、ate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publicati

32、on referred to applies. BS EN 786:1996+A2:2009EN 786:1996+A2:2009 (E) 5 EN 292-1:1991, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology, methodology EN 292-2:1991, Safety of machinery - Basic concepts, general principles for design - Part 2: Technical p

33、rinciples and specifications !EN 292-2:1991/A1:1995, Safety of machinery - Basic concepts, general principles for design Part 2: Technical principles and specifications“ EN 294:1992, Safety of machinery Safety distances to prevent danger zones being reached by the upper limbs !EN 836:1997, Garden eq

34、uipment - Powered lawnmowers Safety EN 28662-1:1992, Hand-held portable power tools - Measurement of vibrations at the handle Part 1: General (ISO 8662-1:1988) EN ISO 354:1993, Acoustics Measurement of sound absorption in a reverberation room (ISO 354:1985) EN ISO 3744:1995, Acoustics - Determinatio

35、n of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994) EN ISO 11201:1995, Acoustics - Noise emitted by machinery and equipment - Measurement of emission sound pressure levels at a work station and at oth

36、er specified positions - Engineering method in an essentially free field over a reflecting plane (ISO 11201:1995) EN ISO 11688-1:1998, Acoustics - Recommended practice for the design of low-noise machinery and equipment Part 1: Planning (ISO/TR 11688-1:1995)“ ISO 3767-1:1991, Tractors, machinery for

37、 agriculture and forestry, powered lawn and garden equipment Symbols for operator controls and other displays Part 1: Common symbols ISO 3767-3:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment Symbols for operator controls and other displays Part 3: Symbols f

38、or powered lawn and garden equipment 3 Definitions For the purposes of this standard the following definitions apply: 3.1 hand-held supported by hand, possibly assisted by wheel(s), skids or harness, etc. 3.2 walk-behind ground supported, controlled by an operator walking behind 3.3 lawn trimmer gra

39、ss trimming machine where the cutting means operates in a plane approximately parallel to the ground 3.4 lawn edge trimmer grass trimming machine where the cutting means operates in a plane approximately perpendicular to the ground BS EN 786:1996+A2:2009EN 786:1996+A2:2009 (E) 6 3.5 cutting means me

40、chanism used to provide the cutting action in which one or more cutting elements, cutting by impact, rotate about an axis normal to the cutting plane 3.6 cutting element single non-metallic filament line or freely pivoting non-metallic cutter 3.7 cutting head a support system for the cutting element

41、 3.8 cutting means control a device activated by the operators hand or finger, for controlling the cutting means movement 4 Safety requirements and/or measures 4.1 Handling Hand-held lawn trimmers and lawn edge trimmers shall have at least one handle. All hand-held lawn trimmers and lawn edge trimme

42、rs with a mass of more than 3,5 kg shall have two handles and the distance between the centres of the two handles shall be at least 250 mm. NOTE This measurement of 250 mm does not apply to two handled lawn trimmers with a mass of 3,5 kg or less. Additionally, hand-held law trimmers and lawn edge tr

43、immers with a mass of more than 6 kg shall also have at least a single shoulder harness and those with a mass of more than 7,5 kg shall have a double shoulder harness. The mass of the machine shall be determined in its heaviest condition for normal use and without cable. The gripping length of any h

44、andle required by this standard shall be at least 100 mm. If a part containing the motor complies with the dimensions pertaining to handles it may be considered as a handle. The gripping length of a bail or closed handle shall comprise any length that is straight or curved at a radius of greater tha

45、n 100 mm together with any blend radius but not more than 10 mm at either or both ends of the gripping surface. If a straight handle is supported centrally (i.e. T type) the gripping length shall be calculated as follows: a) For handles with a periphery (not including the support) less than 80 mm th

46、e gripping length is the sum of the two parts either side of the support. b) For handles with a periphery (not including the support) of 80 mm or more the gripping length is the complete length from end to end. Where appropriate the part of the handle containing the cutting means control actuator sh

47、all be counted as part of the handle gripping length. Finger grip or similar superimposed profiles shall not affect the method of calculating handle gripping length. BS EN 786:1996+A2:2009EN 786:1996+A2:2009 (E) 7 4.2 Protection of power driven transmission parts (other than the cutting means) All p

48、ower driven transmission parts shall be guarded to prevent the operators contact with these parts. All apertures and safety distances shall conform to 4.5.1 and 4.5.3 of EN 294:1992. Compliance shall be checked by inspection. 4.3 Guard attachment All guards required by this standard shall be fixed g

49、uards in accordance with 3.22.1 of EN 292-1:1991 or the construction of the machine shall be such that it cannot be used without the guard in its guarding position in accordance with 3.22.4 of EN 292-1:1991. 4.4 Controls 4.4.1 One cutting means control shall be provided and either this shall require two