1、BRITISH STANDARD Castors and wheels - Hospital bed castors The European 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 BS EN 12531:1999 - been prepared under the direction of the Engineering Amd. No. Date
2、 sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 O BSI 03-1999 ISBN O 680 30647 X STD-BSI BS EN 12531-ENGL 1947 M 1b24bb9 0754b35 247 Text affected BS EN 12631:1999 National foreword This British Standard is the English language v
3、ersion of EN 12531: 1998. The UK participation in its preparation was entsusted to Technical Committee MHE/7, Industrial trucks - Safety, which has the responsibility to: - aid enquirers to understand the te* - present to the responsible European committee any enquiries on the - monitor related inte
4、rnational and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; themintheuK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement inter
5、national or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Inkrnationai Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Caalogue. A British Standard does not purport to includ
6、e ali the necessary provisions of a contract. Users of British Standasds 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 hnt cover, the EN ti
7、tle page, pages 2 to 7 and a back cover. EUROPEAN STANDARD NORNE EUROPENNE EUROPISCHE NORM EN 12531 September 1998 ICs 11.140 Descriptors: general product, bed, hospital, castors, characteristics, product requirements, dimensions, classification, tests, conformity tests, marking English version Cast
8、ors and wheels - Hospital bed castors Roues et roulettes - Roulettes pour lits dhpitaux Wer 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 Regukons which stipuiate the conditions for giving
9、this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographicai references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Stanard exists in three officid versions (
10、English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Centsal Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech
11、Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standarchation Comit Europen de Normalisation Europisches Komitee fur Normung Centrai Secretariat: rue de Sta
12、ssart 36, B-1050 Brussels O 1998 CEN AU rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12531:1998 E Page 2 EN 1263k1998 Foreword This European Standard has been prepared by %chnid Committee CENRY: 324, Castors and wheels, the Secretariat
13、of which is held by DIN. This European Standard shall be given the status of a nationai standard, either by publicaion of an identical text or by endorsement, at the latest by March 1999, and contlicting nakiona standards shall be withdrawn at the latest by March 1999 According to the CEN/CENELEC In
14、terrd Regulations, the national standards organizations of the following countries are bound to implement this European Stan - overail height (see lkble 1); - offset (see Wle 1); - fuzing system (see 4.1); - load capacity (see 4.2). Dimensions listed in Table 1 and Figure 1 shall be used. Page 3 EN
15、12531:1998 Table 1 - Principal dimensions of swivel castors for hospital beds Dimensions in millimetres Wheel diameter (0) Tolerance: * 1 % 100 125 150 200 250 Overall height Offset (H max. I max. 150 175 200 250 300 46 56 65 70 80 For dimensions of non central locking castors used in hospital beds,
16、 refer to relevant tables in EN 125301998. 4.1 Fixing system The principal dimension of the fixing system with 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 coll
17、ar; - dimension of the hexagon hole; - working angle of the hexagon hole. 4.2 Load capacity Maximum load, in N, which can 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 meth
18、ods and apparatus are defined in EN 125271998. 6.1 Standard Conditions 6.1.1 Environmental conditions Tests have to be carried out at a temperature between 15 OC and 28 OC. During the 24 h prior to the test the sample(s) shall remain at the above temperature, in an environment with a relative humidi
19、ty between 40 % and 70 %. Sample(s) shall not be artificially cooled during testing. 6.1.2 Test sequence Tests, where relevant, shall be carried out in the sequence as listed in Wle 2. O BSI 03-1999 Page 4 EN 12531:1998 unlocked position - -.-. D h Figure 1 - Principal dimensions of the central lock
20、ing fixing O BSI 03-1999 - STD-BSI BS EN L2531-ENGL 1999 = lb24bb 0754b40 bob II 6.2 5.3 Page 5 EN 12531:1998 Initiai wheel play All 4.2 Initial swivel Dlav Swivel castors with or without accessories 4.3 Table 2 - Test sequence for castor types 6.4 6.6 Reference Il Electrical resistance Castors elec
21、trically conductive 4.4 Fatigue test for lockinghrakinct devices Castors with a centrai lockinghrakinct device 4.6 Test sequence 6.8 6.9 procedures reference Static test All 4.9 Dynamic test All 4.8 6.12 6.13 Final wheel play Au 4.2 Final swivel play Swivel castors with or without accessories 4.3 Ef
22、ficiency check of wheel bmhg and/or locking device Castors with a centrai locking/braking device 4.6 Wheel diameter (0) 100 125 150 200 250 I 6.7 Maximum initial wheel play (Wl) 0,50 0,62 0,75 l,oo 1,25 Efficiency check of swivel braking and/or locking device Castors with a centrai locking/bralung d
23、evice 4.7 Symbol Tolerance Unit Acceptable Efficiency check of wheel braking and/or lockhg device I Castors with a central lockinghrahg device 4.6 Efficiency check of swivel braking 15-11 I andor locking device Castors with a centrai lockinghraking device 4.7 I 6.2 Initial wheel play 6.2.1 Test obje
24、ctives, apparatus and procedures Detailed in 4.2 of EN 125271998. 6.2.2 Acceptance criteria The measured initial wheel play shall not exceed the value (W1) in Table 3. Table 3 - Initiai wheel play Dimensions in millimetres 6.3.3 Acceptance criteria The measured initial swivel play shall not exceed t
25、he value (Si). I I Symbol I Value I Description I si I4mm I maximum initial swivel play I 6.4 Electrical resistance test 5.4.1 Test objectives, apparatus and procedures Detailed in 4.4 of EN 125271998. 5.4.2 Test values The test values are listed below. I Symbol 1 Value 1 Description I variable load
26、 capacity 10 % of L1 variable measured electrical test load ! resistance 5.4.3 Tolerances The tolemces are: L1 L17 N N +i % : % O BSI 03-1999 STD.BSI BS EN L253L-ENGL 1997 W Lb24bb 0754bliL 542 Symbol L1 K2 Page 6 EN 1253k1998 Tolerance unit Acceptable +2 % +4 % O O N N 6.4.4 Acceptance criteria The
27、 resistance R of the sample tested shall be: - conductive castor(s) or wheel): R I 104 Q - antistatic castor) or wheel): lo5 I R 9 lo7 a. 6.6 Fatigue test for lockinghraking device 6.6.1 Test objectives, apparatus and procedures Detailed in 4.6 of EN 125271998. 6.6.2 lkst values The test dues are li
28、sted below. Symbol Description number of locking actions cycles per min 800N minimum load Symbol 6.6.3 Iblerances The tolerances are: Tolerance unit Acceptable E2 I O -2 cycl% load capacity as test load horizontal tsactve force I Symbol I Vaiue L1 Yi Y2 Y3 variable 3 lh 24h 6.8.3 Iblerances The tole
29、rances are: Description load capacity as test load load factor time of application of load elapsed time prior to inmectaon Y2 Ih +15 Io Y3 Ih Iklh I 6.8.4 Acceptance criteria The test is passed if there is no permanent deformaton of the sample, which adversely affects its performance. O BSI O31999 S
30、TD.BS1 BS EN 12531-ENGL 1799 E Lb24bb 0754b42 489 m 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. Symbol L1 u1 v2 hl c n y1 21 22 D Value variable 1,l m/s (4 km/h) 1,l m/s (4 km/h) height of obst
31、acles for wheels with - tread hardness 2 90“ Shore A: 2,5 % of D - tread hardness c 90“ Shore A: 5,0% of D 1 to 3m 1 O00 30 O00 3 min max 1 min variable Description load capacity as test load average speed speed at impact height of obstacles distance between obstacles number of obstacles number of w
32、heel revolutions running period pause period wheel diameter The actual wheel diameter shall be measured prior to commencement and on completion of the test to establish wear. 6.9.3 Tolerances The tolerances are: Symbol Tolerance I Unit N m/S dS mm min min Acceptable +; % +; % 0 % -5 0% 0 % 0 % +lo s
33、 f10 s The tolerances are: - of the obstacle width (100 mm): *2 mm; - of the angle of obstacles to line of motion of 45“: so. 5.9.4 Acceptance criteria The test is passed if there is no permanent deformation of the sample, which adversely affects its performance. The reduction of the wheel diameter
34、shall not exceed 2 % of the measured diameter at the commencement of the test sequence. Page 7 EN 12531:1998 5.10 Efficiency check of wheel braking and/or locking device Repeat test 5.6. 6.11 Efficiency check of swivel braking and/or locking device Repeat test 6.7. 6.12 Final wheel play 6.12.1 Test
35、objectives, apparatus and procedures Detailed in 4.2 of EN 125271998. 6.12.2 Acceptance criteria The wheel wear play shall not exceed the value Wz detailed in Table 4. Table 4- Wheel wear play Dimensions in millimetres Wheel diameter Maximum wheel wear play (0) W2) ; ,p I 150/160 0,75 1,25 6.13 Fina
36、l swivel play 5.13.1 !est objectives, apparatus and procedures Detailed in 4.3 of EN 125271998. 5.13.2 Tolerances The tolerances are: - of the swivel play: lever of 200 mm use to measure the play: %! mm; - angle of rotation of swivelling by 90“: *F. 6.13.3 Acceptance criteria The swivel wear play sh
37、all not exceed the value S2 listed below. I Description I Symbol I Value 1 rs, x-r I maxjmum swivel wear play I 6 Conformity The manufacturer declares on request by a certificate of conformity that the castom are in accordance with the requirements as stated in this document. The type of testing mac
38、hine shall be stated in the conformity document. 7 Marking of the product 7.1 Product marking Au the products shall be permanently and visibly marked with a name and/or trade mark of the manufacturer. 7.2 Marking of electrically conductive castor( s) or wheel( s) AU products shall bear on their oute
39、r surface a clearly visible yellow mark, and where appropriate and possible should include the word “antistatic“. O BSI 03-1999 STD.BS1 BS EN 12531-ENGL 1999 lb24bbc1 0754b43 315 BS EN 1253 1:1999 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent nat
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