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1、BRITISH STANDARD BS 6916-3: 1988 ISO 6533:1983 Chain saws Part 3: Specification for dimensions of front hand guards ISO title: Forestry machinery Portable chain saws Front hand guard Dimensions UDC 674.053:621.93:621.932.5:621.936.6:62 783.614:(083.3):614.8 Licensed Copy: sheffieldun sheffieldun, na
2、, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6916-3:1988 This British Standard, having been prepared under the direction of the Agricultural Machinery and Implements Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 December
3、 1988 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference AGE/29 Draft for comment 81/79474 DC ISBN 0 580 16323 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Agricultural Machinery and Im
4、plements Standards Committee (AGE/-) to Technical Committee AGE/29, upon which the following bodies were represented: Arboricultural Association British Agricultural and Garden Machinery Association Ltd. Consumer Policy Committee of BSI Consumers Association Department of Trade and Industry (Consume
5、r Safety Unit, CA Division) Forestry Commission Health and Safety Executive National Farmers Union National Union of Agricultural and Allied Workers Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncon
6、trolled Copy, (c) BSI BS 6916-3:1988 BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope and field of application1 2Dimensions and clearances1 Figure Dimensions and clearances2 Table Dimensions and clearances1 Licensed Copy: sheffieldun sheffieldun, na, Wed
7、 Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6916-3:1988 ii BSI 11-1999 National foreword This Part of BS 6916 has been prepared under the direction of the Agricultural Machinery and Implements Standards Committee. It is identical with ISO 6533:1983 “Forestry machinery Portable cha
8、in saws Front hand guard Dimensions” prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, of the International Organization for Standardization (ISO). Other Parts of BS 6916 are as follows: Part 1: Glossary of terms; Part 2: Method for specifying requiremen
9、ts; Part 4: Specification for strength of front hand guards; Part 5: Methods of evaluating chain brake performance; Part 6: Method of measurement of airborne noise at the operators position; Part 7: Method of evaluating engine performance including fuel consumption; Part 8: Method of measurement of
10、hand-transmitted vibration; Part 9: Specification for strength of handles; Part 10: Specification for longitudinal balance; Part 11: Specification for general design, performance, safety and construction requirements for internal combustion engined machines1). Terminology and conventions. The text o
11、f the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. Wherever the words “International Stand
12、ard” appear, referring to this standard, they should be read as “Part of BS 6916”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itsel
13、f confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendme
14、nt table on the inside front cover. 1) In preparation. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6916-3:1988 BSI 11-19991 1 Scope and field of application This International Standard specifies the dimensions and clearances of the fr
15、ont hand guards on portable hand-held chain saws. 2 Dimensions and clearances The limiting dimensions and clearances of the front hand guard, measured relative to the centre line of the guide bar at the midpoint of the guard length, shall be as shown in the Figure and given in the Table. If the guar
16、d is a brake arm, a force of 10 N shall be applied, at 45 in a forward and downward direction, at the centre of the top edge when dimensions A, F, G and H are measured. Table Dimensions and clearances Dimension in Figure Description Dimension mm A B C D E F G H Minimum guard height (measured perpend
17、icular to the centre line of the guide bar).a Minimum effective guard length (measured from the right inside surface of the right end of the front handle)b Minimum overlap, guard-guide bar vertical to the plane of the guide bar Maximum guard openingcd Maximum clearance between the lower edge of the
18、guard and the nearest part of the saw body (for example, fuel caps)bcd Minimum clearance between any part of guard and front handle Maximum clearance between any part of guard and front handle Maximum clearance between any part of guard and front handle when the guard is released 20 100 0 55 55 40 7
19、0 100 a The measurement shall be made in relation to the horizontal plane parallel to the centre line of the bar through the middle of dimension B. b The measurement shall apply from the right inside surface of the right end of the front handle or the point where the vertical distance between saw ho
20、using and handle is 35 mm (for dimension E to a point 100 mm to the left). c The intention is to provide an obstacle to prevent the hand from passing through. d A cylindrical gauge, 56 mm in diameter and 82 mm long, held parallel to the hand guard, and pushed forward with a force of 30 N shall not p
21、ass through. (For dimension E, the procedure shall be applied between the lower edge of the guard and the nearest part of the saw body in any parallel position over the whole range of 100 mm.) Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
22、BS 6916-3:1988 2 BSI 11-1999 Figure Dimensions and clearances Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6916-3: 1988 IS
23、O 6533:1983 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions Briti
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30、 permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the c
31、ourse of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 13:07:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI