1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 6533:2012Forestry machinery Portable chain-saw front hand-guard Dimensions and clearancesBS ISO 6533:2012 BRITISH STANDARDNational forewordThis British Standard is the UK
2、implementation of ISO 6533:2012. It supersedes BS ISO 6533:2001, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e A G E / 2 9 , F o r e s t r y m a c h i n e r y .A list of organizations represented on this committee can be obtained on r
3、equest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 69762 3 ICS 65.060.80 Compliance with a B
4、ritish Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 6533:2012 ISO 2012Forestry machinery Portable
5、chain-saw front hand-guard Dimensions and clearancesMachines forestires Protecteur de la main tenant la poigne avant des scies chane portatives Dimensions et dgagementsINTERNATIONAL STANDARDISO6533Fourth edition2012-09-15Reference numberISO 6533:2012(E)BS ISO 6533:2012ISO 6533:2012(E)ii ISO 2012 All
6、 rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO a
7、t the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 6533:2012ISO 6533:2012(E) ISO 2012 All rights reserved iiiConte
8、nts PageForeword iv1 Scope . 12 Normative reference . 13 Terms and definitions . 14 General 25 Gauge dimensions . 26 Determination of reference point X0. 27 Front hand-guard dimensions 57.1 Front hand-guard width, W157.2 Front hand-guard height over front handle, H1and H1A. 57.3 Line between X0and t
9、he rearmost part of unprotected saw chain . 67.4 Front hand-guard openings, H3. 68 Clearance between the hand-guard and the chain saw body, H2. 79 Clearances between the hand-guard and the front handle 7BS ISO 6533:2012ISO 6533:2012(E)ForewordISO (the International Organization for Standardization)
10、is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be repres
11、ented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are d
12、rafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International S
13、tandard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 6533 was prepared b
14、y Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 17, Manually portable forest machinery.This fourth edition cancels and replaces the third edition (ISO 6533:2001), which has been technically revised primarily concerning the determination of refere
15、nce point X0.iv ISO 2012 All rights reservedBS ISO 6533:2012INTERNATIONAL STANDARD ISO 6533:2012(E)Forestry machinery Portable chain-saw front hand-guard Dimensions and clearances1 ScopeThis International Standard specifies the dimensions and clearances for front hand-guards and their openings on po
16、rtable hand-held chain-saws. These dimensions and clearances ensure the necessary safety provided by the hand-guard, which serves as both a shield between the operators hand and the saw chain and as an actuator for manually operated chain brakes. For chain-saws with wrap around handles, this Interna
17、tional Standard is not applicable to the portion of the front handle to the right (when viewed from the rear) of the top brace.2 Normative referenceThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For und
18、ated references, the latest edition of the referenced document (including any amendments) applies.ISO 6531, Machinery for forestry Portable hand-held chain-saws Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 6531 apply.NOTE Figure 1 provide
19、s an example of a chain-saw rear view.Key1 top brace2 front handle3 rear handleFigure 1 Example of a chain saw with a wrap around handle Rear view ISO 2012 All rights reserved 1BS ISO 6533:2012ISO 6533:2012(E)4 GeneralThe dimensions of the front hand-guard and the clearances shall be in relation to
20、the intended position of the left hand on the front handle during vertical cutting (bucking), determined using defined gauges (see Clause 5).Unless otherwise specified, the following is applicable when determining the dimensions and clearances.a) The chain-saw shall be kept in the upright position;
21、and the total forces applied to the guards (force on gauge plus gauge gravity force in probing direction) shall be 10 N 10N.b) If the front hand-guard also activates the chain brake, the measurements shall be made1) with the front hand guard in the position for non-activated chain brake, and2) with
22、a force of 10 N 10N applied at the top edge of the guard, at 45 in a forward and downward direction relative to the guidebar centreline and 50 mm to the left of the reference point X0(see Clause 6), when viewed from the rear.5 Gauge dimensionsRigid gauges of the types and sizes specified in Table 1
23、shall be used to determine the dimensions and clearances.Table 1 Gauge dimensionsDimensions in millimetresGauge type Diameter D 0,1 mmLength L 0,1 mmCorner radius r 10A 35 100 5B 70 100 0,5C 56 82 0,56 Determination of reference point X06.1 The reference point X0shall be determined, when viewed from
24、 the rear, using a type A gauge kept furthest to the right side of the front handle, directly below and in line with the centreline of the front handle as specified in Figure 2.2 ISO 2012 All rights reservedBS ISO 6533:2012ISO 6533:2012(E)Key1 type A gauge2 type A gauge centreline3 chain saw body4 g
25、uide bar5 front handleFigure 2 Definition of reference point X0when there is gauge contact between the housing and the front handle6.2 When the machine is designed in such a way that a type A gauge of 100 mm length cannot be inserted between the handle and the housing, and X0cannot be determined usi
26、ng such a gauge, the gauge length can be shortened (though no more than necessary). Using this modified gauge, X0shall be determined according to all other requirements of 6.1. ISO 2012 All rights reserved 3BS ISO 6533:2012ISO 6533:2012(E)6.3 If no contact between the gauge, the housing and the fron
27、t handle can be achieved, then X0shall be determined as the intersection point, transposed to the front handle along the line of sight, between the upper right edge of the type A gauge and a virtual surface that is created by a line of sight, parallel to the guide bar centre line, following the righ
28、t inner surface contour of the front handle (see Figure 3)Key1 type A gauge2 type A gauge centreline3 guide bar4 chain saw body5 front handleFigure 3 Definition of reference point X0when there is no contact between the gauge and the front handle4 ISO 2012 All rights reservedBS ISO 6533:2012ISO 6533:
29、2012(E)7 Front hand-guard dimensions7.1 Front hand-guard width, W1The front hand-guard width, W1, is the distance from X0, left, to the point at which the requirement for the front hand-guard height over the front handle, H1and H1A, respectively (see 7.2), is not fulfilled. See Figure 4.The front ha
30、nd-guard width, W1, shall in both cases (H1and H1A) be at least 100 mm.Figure 4 Front hand-guard width, W1, from the rear view of the machine7.2 Front hand-guard height over front handle, H1and H1AThe measurement of the vertical height H1and H1Ashall be made in a plane parallel to the guide bar plan
31、e and perpendicular to the guide bar centreline (see Figure 5).Any free play in the guide bar fixing shall be taken up by tightening the guide bar to the saw body in its uppermost position.The height, H1, above top of front handle shall be at least 20 mm.When the front hand-guard also activates the
32、chain brake, this height shall be at least 20 mm with disengaged chain brake (H1), and 0 mm for engaged chain brake (H1A). ISO 2012 All rights reserved 5BS ISO 6533:2012ISO 6533:2012(E)Key1 centreline of guide barFigure 5 Front hand-guard height over front handle (H1and H1A) Machine viewed from the
33、right side7.3 Line between X0and the rearmost part of unprotected saw chainA line drawn from X0to the rearmost upper unprotected part of the saw chain on the guide bar (see Figure 6) shall be intersected by a surface determined by the outer contour of the front hand-guard and/or the housing. Any ope
34、ning in this surface shall fulfil the requirements in 7.4 and Clause 8.Key1 intersection point2 unprotected part of saw chainFigure 6 Line between X0and rearmost part of unprotected saw chain7.4 Front hand-guard openings, H3The front hand-guard may have openings. Such openings shall be limited so th
35、at a type C gauge, applied in any direction and from either front or rear, cannot pass through when pushed perpendicularly toward the opening. See Figure 7.6 ISO 2012 All rights reservedBS ISO 6533:2012ISO 6533:2012(E)Key1 type C gauge2 guide barFigure 7 Front hand-guard openings, H3, and clearance,
36、 H2, between hand-guard and chain saw body Machine front view8 Clearance between the hand-guard and the chain saw body, H2The clearance, H2, between the lower edge of the front hand-guard and any component of the chain saw body shall be limited so that a type C gauge, held at point X0(see Figure 3)
37、and held parallel to the front hand-guard, cannot pass through (see Figure 6).If necessary, the gauge can be applied from the front, in which case additional means could be necessary for holding the hand-guard in position.9 Clearances between the hand-guard and the front handleThere shall be a clear
38、ance between any part of the front hand-guard and the front handle, starting from X0to the left when viewed from behind, such that a type A gauge can pass the clearance without coming into contact with the hand-guard see Figure 8 a), and a type B gauge cannot pass the clearance and any part of the g
39、auge centreline will not come lower than any part of the centreline of the front handle see Figure 8 b). ISO 2012 All rights reserved 7BS ISO 6533:2012ISO 6533:2012(E)Dimensions in millimetresa) Type A gauge Passb) Type B gauge StopKey1 type A gauge2 type B gauge Figure 8 Clearances between front ha
40、nd-guard and front handle Machine viewed from the right side8 ISO 2012 All rights reservedBS ISO 6533:2012BS ISO 6533:2012ISO 6533:2012(E) ISO 2012 All rights reservedICS 65.060.80Price based on 8 pagesThis page deliberately left blankBSI is the independent national body responsible for preparing Br
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