BS-ISO-7176-8-1998.pdf
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1、BRITISH STANDARD BS ISO 7176-8:1998 Wheelchairs Part 8: Requirements and test methods for static, impact and fatigue strengths ICS 11.180 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7176-8:1998 This British Standard, having been p
2、repared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 October 1998 BSI 05-1999 ISBN 0 580 30512 0 National foreword This British Standard reproduces verbatim ISO 7176-8:1998 and implements it as th
3、e UK national standard. The UK participation in its preparation was entrusted to Technical Committee CH/40, Sanitary chairs and wheelchairs, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpr
4、etation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which
5、 implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not
6、 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 itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside fr
7、ont cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 50 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Am
8、d. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7176-8:1998 BSI 05-1999i Contents Page National forewordInside front cover Forewordiv Text of ISO 7176-81 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:
9、35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7176-8:1998 ii BSI 05-19
10、99 Contents Page Forewordiv Introduction1 1Scope1 2Normative references1 3Definitions2 4Requirements2 4.1Strength requirements2 4.2Disclosure requirements2 5Test apparatus2 6Preparation of test wheelchair10 6.1Equipping the wheelchair10 6.2Inflation of pneumatic tyres10 6.3Adjustments10 6.4Test dumm
11、ies11 6.5Records12 7Sequence of tests 12 8Test methods for static strength12 8.1Principle12 8.2Wheelchair preparation12 8.3Selection of loading pad12 8.4Armrests: resistance to downward forces Test method12 8.5Footrests: resistance to downward forces Test method15 8.6Tipping levers Test method17 8.7
12、Handgrips Test method17 8.8Armrests: resistance to upward forces Test method19 8.9Footrests: resistance to upward forces Test method19 8.10 Push handles: resistance to upward load Test method21 8.11 Records21 9Test methods for impact strength21 9.1Principle21 9.2Wheelchair preparation21 9.3Backrest:
13、 resistance to impact Test method23 9.4Handrim: resistance to impact Test method26 9.5Castors: resistance to impact Test method27 9.6Footrests: resistance to impact Test method27 9.7Front structure: resistance to impact Test method27 9.8Records29 10Fatigue tests Test method29 10.1 Principle29 10.2 P
14、reparation of test wheelchair for fatigue tests29 10.3 Restraints of test dummy29 10.4 Two-drum test29 10.5 Drop test34 10.6 Records35 11Evaluation of test results35 12Test report35 Annex A (informative) Principles applied to derive static test loads36 Annex B (informative) Design considerations42 A
15、nnex C (informative) Derivation of pendulum swing angle for castor and footrest impact tests43 Annex D (informative) Derivation of pendulum centre of percussion46 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7176-8:1998 BSI 05-1999
16、iii Page Annex E (informative) Tracking characteristics of wheelchairs47 Figure 1 Loading pads for static loads3 Figure 2 a) Backrest impact pendulum4 Figure 2 b) Backrest impact pendulum5 Figure 3 Handrim impact test pendulum6 Figure 4 Test dummy back reference plane7 Figure 5 Two-drum test machine
17、9 Figure 6 Method of preventing wheelchair from tipping10 Figure 7 Downward forces and armrests13 Figure 8 a) Location of footrest loads14 Figure 8 b) Location of footrest loads15 Figure 9 Load applied to tipping levers16 Figure 10 Loading18 Figure 11 Upward forces on armests20 Figure 12 Upward forc
18、es on footrests22 Figure 13 Upward forces on push handles24 Figure 14 Pivoted backrests25 Figure 15 Backrest impact test25 Figure 16 Handrim impact test26 Figure 17 Arrangements of castor impact test28 Figure 18 Location of impacts on footrests30 Figure 19 a) Location of frontal impacts on front str
19、ucture31 Figure 19 b) Location of offset impacts on front structure 7032 Figure 20 Restraints33 Figure 21 Foam pads for kerb drop tests34 Figure A.1 Load on tipping levers37 Figure A.2 Wheelchair loads on stairs39 Figure C.1 Castor/footrest test45 Figure E.148 Figure E.249 Figure E.350 Table 1 Masse
20、s12 Table 2 Downward forces to be applied to armrests13 Table 3 Downward forces to be applied to footrests15 Table 4 Forces to be applied to tipping levers16 Table 5 Pull off forces to be applied handgrip17 Table 6 Upward loads to be applied to armrests17 Table 7 Loads to be applied to footrests21 T
21、able 8 Upward forces on push handles23 Descriptors: Disabled persons aids, wheel chairs, specifications, mechanical strength, tests, mechanical tests, impact tests, fatigue tests. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 02:14:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7176-8
22、:1998 iv BSI 05-1999 Foreword 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
23、subject for which a technical 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
24、 (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International
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