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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12531:1999 The Euro
2、pean Standard EN 12531:1998 has the status of a British Standard ICS 11.140 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Castors and wheels Hospital bed castors BS EN 12531:1999 This British Standard, having been prepared under the direction of the Engineering Sector Commit
3、tee, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 03-1999 ISBN 0 580 30647 X Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 12531:1998. The UK parti
4、cipation in its preparation was entrusted to Technical Committee MHE/7, Industrial trucks Safety, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interes
5、ts 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 implement international or European publications referre
6、d 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 purport to include all the necessary provisions of a contrac
7、t. 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 front cover, the EN title page, pages 2 to 7 and a back cover.
8、CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12531:199
9、8 E EUROPEAN STANDARDEN 12531 NORME EUROPE ENNE EUROPA ISCHE NORM September 1998 ICS 11.140 Descriptors: general product, bed, hospital, castors, characteristics, product requirements, dimensions, classification, tests, conformity tests, marking English version Castors and wheels Hospital bed castor
10、s Roues et roulettes Roulettes pour lits dho pitauxRa der und Rollen Krankenbettenrollen This European Standard was approved by CEN on 30 August 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
11、 of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A ver
12、sion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, Fra
13、nce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 12531:1998 BSI 03-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 324, Castors and wheels, the Secretariat of which
14、is held by DIN. 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 March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999 According to the CEN/CENELEC Internal
15、Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
16、the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Dimensions3 4.1Fixing system3 4.2Load capacity3 5Requirements3 5.1Standard Conditions3 5.2Initial wheel play5 5.3Initial swivel play5 5.4Electrical resistance test5 5.5Fatigue test for locking/braking device6 5
17、.6Efficiency check of wheel braking and/or locking device6 5.7Efficiency check of swivel braking and/or locking device6 5.8Static test6 5.9Dynamic test7 5.10 Efficiency check of wheel braking and/or locking device7 5.11 Efficiency check of swivel braking and/or locking device7 5.12 Final wheel play7
18、 5.13 Final swivel play7 6Conformity7 7Marking of the product7 7.1Product marking7 7.2Marking of electrically conductive castor(s) or wheel(s)7 ? Page 3 EN 12531:1998 BSI 03-1999 1 Scope This European Standard specifies the technical requirements, the appropriate dimensions and the requirements for
19、testing. This European Standard applies to swivel castors for hospital beds with a wheel diameter of 100 mm or more, which have a central locking device. Swivel castors may be used with the main principal dimensions. 2 Normative references This European Standard incorporates by dated or undated refe
20、rence, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply only to this European Standard only when inc
21、orporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 12526:1998, Castors and wheels Vocabulary, symbols and multilingual dictionary. EN 12527:1998, Castors and wheels Test methods and apparatus. EN 12530:1998, Castors and whee
22、ls Castors and wheels for manually propelled institutional applications. ISO 7619, Rubber Determination of indentation hardness by means of pocket hardness meters. 3 Definitions For the purpose of this European Standard, definitions and recommended symbols of EN 12526:1998 apply. 4 Dimensions The ch
23、aracteristics of a castor are: wheel diameter (see Table 1); overall height (see Table 1); offset (see Table 1); fixing system (see 4.1); load capacity (see 4.2). Dimensions listed in Table 1 and Figure 1 shall be used. Table 1 Principal dimensions of swivel castors for hospital beds Dimensions in m
24、illimetres Wheel diameterOverall heightOffset (D)(H)(F) Tolerance:1 %max.max. 10015046 12517556 15020065 20025070 25030080 For dimensions of non central locking castors used in hospital beds, refer to relevant tables in EN 12530:1998. 4.1 Fixing system The principal dimension of the fixing system wi
25、th the central locking are: stem length; stem diameter; distance of the threaded hole centre from the stem collar; thread size; distance of the hexagon hole centre from the stem collar; dimension of the hexagon hole; working angle of the hexagon hole. 4.2 Load capacity Maximum load, in N, which can
26、be carried by a wheel or a castor so as to fully comply to the required acceptance criteria. 5 Requirements Testing requirements for castors and wheels are listed below. Test methods and apparatus are defined in EN 12527:1998. 5.1 Standard Conditions 5.1.1 Environmental conditions Tests have to be c
27、arried out at a temperature between 15 8C and 28 8C. During the 24 h prior to the test the sample(s) shall remain at the above temperature, in an environment with a relative humidity between 40 % and 70 %. Sample(s) shall not be artificially cooled during testing. 5.1.2 Test sequence Tests, where re
28、levant, shall be carried out in the sequence as listed in Table 2. ? Page 4 EN 12531:1998 BSI 03-1999 Figure 1 Principal dimensions of the central locking fixing ? Page 5 EN 12531:1998 BSI 03-1999 Table 2 Test sequence for castor types ReferenceTest sequenceCastor typesTest procedures reference 5.2I
29、nitial wheel playAll4.2 5.3Initial swivel playSwivel castors with or without accessories4.3 5.4Electrical resistanceCastors electrically conductive4.4 5.5Fatigue test for locking/braking devicesCastors with a central locking/braking device4.5 5.6Efficiency check of wheel braking and/or locking devic
30、e Castors with a central locking/braking device4.6 5.7Efficiency check of swivel braking and/or locking device Castors with a central locking/braking device4.7 5.8Static testAll4.9 5.9Dynamic testAll4.8 5.10Efficiency check of wheel braking and/or locking device Castors with a central locking/brakin
31、g device4.6 5.11Efficiency check of swivel braking and/or locking device Castors with a central locking/braking device4.7 5.12Final wheel playAll4.2 5.13Final swivel playSwivel castors with or without accessories4.3 5.2 Initial wheel play 5.2.1 Test objectives, apparatus and procedures Detailed in 4
32、.2 of EN 12527:1998. 5.2.2 Acceptance criteria The measured initial wheel play shall not exceed the value (W1) in Table 3. Table 3 Initial wheel play Dimensions in millimetres Wheel diameterMaximum initial wheel play (D)(W1) 1000,50 1250,62 1500,75 2001,00 2501,25 5.3 Initial swivel play 5.3.1 Test
33、objectives, apparatus and procedures Detailed in 4.3 of EN 12527:1998. 5.3.2 Tolerances The tolerances are: of the swivel play: lever of 200 mm use to measure the play:2 mm; angle of rotation of swivelling by 908:58. 5.3.3 Acceptance criteria The measured initial swivel play shall not exceed the val
34、ue (S1). SymbolValueDescription S14 mmmaximum initial swivel play 5.4 Electrical resistance test 5.4.1 Test objectives, apparatus and procedures Detailed in 4.4 of EN 12527:1998. 5.4.2 Test values The test values are listed below. SymbolValueDescription L1variableload capacity L1710 % of L1test load
35、 Rvariablemeasured electrical resistance 5.4.3 Tolerances The tolerances are: SymbolTolerance UnitAcceptable L1N % 0 +2 L17N % 0 +2 ? Page 6 EN 12531:1998 BSI 03-1999 5.4.4 Acceptance criteria The resistance R of the sample tested shall be: conductive castor(s) or wheel(s): R # 104V; antistatic cast
36、or(s) or wheel(s): 105# R # 107V. 5.5 Fatigue test for locking/braking device 5.5.1 Test objectives, apparatus and procedures Detailed in 4.5 of EN 12527:1998. 5.5.2 Test values The test values are listed below. SymbolValueDescription E110 000number of locking actions E210cycles per min L3800 Nminim
37、um load 5.5.3 Tolerances The tolerances are: SymbolTolerance UnitAcceptable E1 % 0 +1 E2cycles/min 22 0 5.5.4 Acceptance criteria The test is passed if there is no wear and/or permanent deformation which adversely affects the performance of the sample. 5.6 Efficiency check of wheel braking and/or lo
38、cking device 5.6.1 Test objectives, apparatus and procedures Detailed in 4.6 of EN 12527:1998. 5.6.2 Test values The test values are listed below. SymbolValueDescription L1variableload capacity as test load K140 % of L1horizontal tractive force 5.6.3 Tolerances The tolerances are: SymbolTolerance Un
39、itAcceptable L1N % 0 +2 K1N % 0 +4 The tolerance of the time of application of load (10 s) is:s. 0 +2 5.6.4 Acceptance criteria No revolving movement around its axis is allowed when the force K1is applied. 5.7 Efficiency check of swivel braking and/or locking device 5.7.1 Test objectives, apparatus
40、and procedures Detailed in 4.7 of EN 12527:1998. 5.7.2 Test values The test values are listed below. SymbolValueDescription L1variableload capacity as test load K240 % of L1horizontal tractive force 5.7.3 Tolerances The tolerances are: SymbolTolerance UnitAcceptable L1N % 0 +2 K2N % 0 +4 The toleran
41、ce of the time of application of load K2 (10 s) is:s. 0 +2 5.7.4 Acceptance criteria No swivelling movement is detected during the second application of the force K2. 5.8 Static test 5.8.1 Test objectives, apparatus and procedures Detailed in 4.9 of EN 12527:1998. 5.8.2 Test values The test values a
42、re listed below. SymbolValueDescription L1variableload capacity as test load y13load factor y21 htime of application of load y324 helapsed time prior to inspection 5.8.3 Tolerances The tolerances are: SymbolTolerance UnitAcceptable L1N % 0 +2 y2h min 0 +15 y3h 1 h 5.8.4 Acceptance criteria The test
43、is passed if there is no permanent deformation of the sample, which adversely affects its performance. ? Page 7 EN 12531:1998 BSI 03-1999 5.9 Dynamic test 5.9.1 Test objectives, apparatus and procedures Detailed in 4.8 of EN 12527:1998. 5.9.2 Test values The test values are listed below. SymbolValue
44、Description L1variableload capacity as test load v11,1 m/s (4 km/h)average speed v21,1 m/s (4 km/h)speed at impact h1height of obstacles for wheels with: height of obstacles tread hardness $ 908 Shore A: 2,5 % of D tread hardness 908 Shore A: 5,0 % of D c1 to 3 mdistance between obstacles n1 000numb
45、er of obstacles r130 000number of wheel revolutions z13 minrunning period z2max. 1 minpause period Dvariablewheel diameter The actual wheel diameter shall be measured prior to commencement and on completion of the test to establish wear. 5.9.3 Tolerances The tolerances are: SymbolTolerance UnitAccep
46、table L1N % 0 +2 v1m/s % 0 +5 v2m/s % 0 +5 h1mm % 25 0 n % 0 +1 r1 % 0 +1 z1min 10 s z2min 10 s The tolerances are: of the obstacle width (100 mm):2 mm; of the angle of obstacles to line of motion of 458:38. 5.9.4 Acceptance criteria The test is passed if there is no permanent deformation of the sam
47、ple, which adversely affects its performance. The reduction of the wheel diameter shall not exceed 2 % of the measured diameter at the commencement of the test sequence. 5.10 Efficiency check of wheel braking and/or locking device Repeat test 5.6. 5.11 Efficiency check of swivel braking and/or locki
48、ng device Repeat test 5.7. 5.12 Final wheel play 5.12.1 Test objectives, apparatus and procedures Detailed in 4.2 of EN 12527:1998. 5.12.2 Acceptance criteria The wheel wear play shall not exceed the value W2 detailed in Table 4. Table 4 Wheel wear play Dimensions in millimetres Wheel diameterMaximu
49、m wheel wear play (D)(W2) 1000,50 1250,62 150/1600,75 2001,00 2501,25 5.13 Final swivel play 5.13.1 Test objectives, apparatus and procedures Detailed in 4.3 of EN 12527:1998. 5.13.2 Tolerances The tolerances are: of the swivel play: lever of 200 mm use to measure the play:2 mm; angle of rotation of swivelling by 908:58. 5.13.3 Acceptance criteria The swivel wear play shall not exceed the value S2 listed below. SymbolVa