1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 6533:2012 Forestry machinery Portable chain-saw front hand-guard Dimensions and clearancesBS ISO 6533:2012 BRITISH STANDARD National foreword This British Standard is t
2、he UK 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 It supersedes BS ISO 6533:2001, which is withdrawn.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 obtai
3、ned on request 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 Complianc
4、e with a British 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 publication Date T e x t a f f e c t e dBS ISO 6533:2012 ISO 2012 Forestry machi
5、nery Portable chain- saw front hand-guard Dimensions and clearances Machines forestires Protecteur de la main tenant la poigne avant des scies chane portatives Dimensions et dgagements INTERNATIONAL STANDARD ISO 6533 Fourth edition 2012-09-15 Reference number ISO 6533:2012(E)BS ISO 6533:2012ISO 6533
6、2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All 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
7、 writing from either ISO at the address below or ISOs 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 + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 6533:2012ISO 6533:2012(E) ISO
8、2012 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative reference . 1 3 T erms and definitions . 1 4 General 2 5 Gauge dimensions . 2 6 Determination of reference point X 0. 2 7 Front hand-guard dimensions 5 7.1 Front hand-guard width, W 15 7.2 Front hand-guard height over fro
9、nt handle, H 1and H 1A. 5 7.3 Line between X 0and the rearmost part of unprotected saw chain . 6 7.4 Front hand-guard openings, H 3. 6 8 Clearance between the hand-guard and the chain saw body, H 2.7 9 Clearances between the hand-guard and the front handle 7BS ISO 6533:2012ISO 6533:2012(E) Foreword
10、ISO (the International Organization for Standardization) 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
11、committee has been established has the right to be represented 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 elect
12、rotechnical standardization. International Standards are drafted 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
13、member bodies for voting. Publication as an International Standard 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 ident
14、ifying any or all such patent rights. ISO 6533 was prepared by 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 techni
15、cally revised primarily concerning the determination of reference point X 0 . iv ISO 2012 All rights reservedBS ISO 6533:2012INTERNATIONAL ST ANDARD ISO 6533:2012(E) Forestry machinery Portable chain-saw front hand- guard Dimensions and clearances 1 Scope This International Standard specifies the di
16、mensions and clearances for front hand-guards and their openings on portable 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 operat
17、ed chain brakes. For chain-saws with wrap around handles, this International 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 reference The following referenced documents are indispensable for the application of this
18、 document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6531, Machinery for forestry Portable hand-held chain-saws Vocabulary 3 T erms a nd definiti ons For the purposes of this doc
19、ument, the terms and definitions given in ISO 6531 apply. NOTE Figure 1 provides an example of a chain-saw rear view. Key 1 top brace 2 front handle 3 rear handle Figure 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 Gene
20、ral The dimensions of the front hand-guard and the clearances shall be in relation to 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
21、 the dimensions and clearances. a) The chain-saw shall be kept in the upright position; and the total forces applied to the guards (force on gauge plus gauge gravity force in probing direction) shall be 10 N N. b) If the front hand-guard also activates the chain brake, the measurements shall be made
22、 1) with the front hand guard in the position for non-activated chain brake, and 2) with a force of 10 N N 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 X 0(see Clause 6), when viewed f
23、rom the rear. 5 Gauge dimensions Rigid gauges of the types and sizes specified in Table 1 shall be used to determine the dimensions and clearances. Table 1 Gauge dimensions Dimensions in millimetres Gauge type Diameter D 0,1 mm Length L 0,1 mm Corner radius r A 35 100 5 B 70 100 0,5 C 56 82 0,5 6 De
24、termination of reference point X 0 6.1 The reference point X 0shall be determined, when viewed from 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 r
25、eservedBS ISO 6533:2012ISO 6533:2012(E) Key 1 type A gauge 2 type A gauge centreline 3 chain saw body 4 guide bar 5 front handle F i g u r e 2 D e f i n i t i o n o f r e f e r e n c e p o i n t X 0when there is gauge contact between the housing and the front handle 6.2 When the machine is designed
26、in such a way that a type A gauge of 100 mm length cannot be inserted between the handle and the housing, and X 0cannot be determined using such a gauge, the gauge length can be shortened (though no more than necessary). Using this modified gauge, X 0shall be determined according to all other requir
27、ements 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 front handle can be achieved, then X 0shall be determined as the intersection point, transposed to the front handle along the line of sight, between the upper right
28、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 right inner surface contour of the front handle (see Figure 3) Key 1 type A gauge 2 type A gauge centreline 3 guide bar 4 chain saw body 5 front handle F i g u r e
29、3 Def i n it i o n o f r efer en c e po i n t X 0when there is no contact between the gauge and the front handle 4 ISO 2012 All rights reservedBS ISO 6533:2012ISO 6533:2012(E) 7 Front hand-guard dimensions 7.1 Front hand-guard width, W 1The front hand-guard width, W 1 , is the distance from X 0 , le
30、ft, to the point at which the requirement for the front hand-guard height over the front handle, H 1and H 1A , respectively (see 7.2), is not fulfilled. See Figure 4. The front hand-guard width, W 1 , shall in both cases (H 1and H 1A ) be at least 100 mm. Figure 4 Front hand-guard width, W 1 , from
31、the rear view of the machine 7.2 Front hand-guard height over front handle, H 1and H 1AThe measurement of the vertical height H 1and H 1Ashall be made in a plane parallel to the guide bar plane and perpendicular to the guide bar centreline (see Figure 5). Any free play in the guide bar fixing shall
32、be taken up by tightening the guide bar to the saw body in its uppermost position. The height, H 1 , above top of front handle shall be at least 20 mm. When the front hand-guard also activates the chain brake, this height shall be at least 20 mm with disengaged chain brake (H 1 ), and 0 mm for engag
33、ed chain brake (H 1A ). ISO 2012 All rights reserved 5BS ISO 6533:2012ISO 6533:2012(E) Key 1 centreline of guide bar Figure 5 Front hand-guard height over front handle (H 1and H 1A ) Machine viewed from the right side 7.3 Line between X 0and the rearmost part of unprotected saw chain A line drawn fr
34、om X 0to 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 opening in this surface shall fulfil the requirements in 7.4 and Clause 8. Key 1 intersectio
35、n point 2 unprotected part of saw chain Figure 6 Line between X 0and rearmost part of unprotected saw chain 7.4 Front hand-guard openings, H 3The front hand-guard may have openings. Such openings shall be limited so that a type C gauge, applied in any direction and from either front or rear, cannot
36、pass through when pushed perpendicularly toward the opening. See Figure 7. 6 ISO 2012 All rights reservedBS ISO 6533:2012ISO 6533:2012(E) Key 1 type C gauge 2 guide bar Figure 7 Front hand-guard openings, H 3 , and clearance, H 2 , between hand-guard and chain saw body Machine front view 8 Clearance
37、 between the hand-guard and the chain saw body, H 2The clearance, H 2 , 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 X 0(see Figure 3) and held parallel to the front hand-guard, cannot pass through (see
38、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 handle There shall be a clearance between any part of the front hand-guard and the front handl
39、e, starting from X 0to 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 gauge centreline will not come lower than any part of the centrel
40、ine of the front handle see Figure 8 b). ISO 2012 All rights reserved 7BS ISO 6533:2012ISO 6533:2012(E) Dimensions in millimetres a) Type A gauge Pass b) Type B gauge Stop Key 1 type A gauge 2 type B gauge Figure 8 Clearances between front hand-guard and front handle Machine viewed from the right si
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