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 castorsBS EN 12531:1999 This British Standard, having been prepared under the direction of the Engineering Sector Committ
3、ee, 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. Date Text affected National foreword This British Standard is the English language version of EN 12531:1998. The UK part
4、icipation 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 intere
5、sts 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 referr
6、ed 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 co
7、ntract. 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 co
8、ver.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
9、:1998 E EUROPEAN STANDARD EN 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 c
10、astors Roues et roulettes Roulettes pour lits dho pitaux Ra 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
11、status 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).
12、 A version 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, Finlan
13、d, France, 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 w
14、hich 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 Inte
15、rnal 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
16、 and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Dimensions 3 4.1 Fixing system 3 4.2 Load capacity 3 5 Requirements 3 5.1 Standard Conditions 3 5.2 Initial wheel play 5 5.3 Initial swivel play 5 5.4 Electrical resistance test 5 5.5 Fatigue test
17、for locking/braking device 6 5.6 Efficiency check of wheel braking and/or locking device 6 5.7 Efficiency check of swivel braking and/or locking device 6 5.8 Static test 6 5.9 Dynamic test 7 5.10 Efficiency check of wheel braking and/or locking device 7 5.11 Efficiency check of swivel braking and/or
18、 locking device 7 5.12 Final wheel play 7 5.13 Final swivel play 7 6 Conformity 7 7 Marking of the product 7 7.1 Product marking 7 7.2 Marking of electrically conductive castor(s) or wheel(s) 7Page 3 EN 12531:1998 BSI 03-1999 1 Scope This European Standard specifies the technical requirements, the a
19、ppropriate dimensions and the requirements for 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
20、 Standard incorporates by dated or undated reference, 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 app
21、ly only to this European Standard only when incorporated 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
22、 and apparatus. EN 12530:1998, Castors and wheels 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 symb
23、ols of EN 12526:1998 apply. 4 Dimensions The characteristics 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 s
24、wivel castors for hospital beds Dimensions in millimetres Wheel diameter Overall height Offset (D)( H )( F ) Tolerance: 1 % max. max. 100 150 46 125 175 56 150 200 65 200 250 70 250 300 80 For dimensions of non central locking castors used in hospital beds, refer to relevant tables in EN 12530:1998.
25、 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 collar; dimension of the hexagon hole; working angle of
26、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 methods and apparatus are defined in EN 12527:1998. 5.1 Sta
27、ndard Conditions 5.1.1 Environmental conditions Tests have to be carried out at a temperature between 158C and 288C. 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 artific
28、ially cooled during testing. 5.1.2 Test sequence Tests, where relevant, 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 fixingPage 5 EN 12531:1998 BSI 03-1999 Table 2 Test sequence for castor types Refere
29、nce Test sequence Castor types Test procedures reference 5.2 Initial wheel play All 4.2 5.3 Initial swivel play Swivel castors with or without accessories 4.3 5.4 Electrical resistance Castors electrically conductive 4.4 5.5 Fatigue test for locking/braking devices Castors with a central locking/bra
30、king device 4.5 5.6 Efficiency check of wheel braking and/or locking device Castors with a central locking/braking device 4.6 5.7 Efficiency check of swivel braking and/or locking device Castors with a central locking/braking device 4.7 5.8 Static test All 4.9 5.9 Dynamic test All 4.8 5.10 Efficienc
31、y check of wheel braking and/or locking device Castors with a central locking/braking device 4.6 5.11 Efficiency check of swivel braking and/or locking device Castors with a central locking/braking device 4.7 5.12 Final wheel play All 4.2 5.13 Final swivel play Swivel castors with or without accesso
32、ries 4.3 5.2 Initial wheel play 5.2.1 Test objectives, apparatus and procedures Detailed in 4.2 of EN 12527:1998. 5.2.2 Acceptance criteria The measured initial wheel play shall not exceed the value (W 1 ) in Table 3. Table 3 Initial wheel play Dimensions in millimetres Wheel diameter Maximum initia
33、l wheel play (D)( W 1 ) 100 0,50 125 0,62 150 0,75 200 1,00 250 1,25 5.3 Initial swivel play 5.3.1 Test 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
34、swivelling by 908: 58. 5.3.3 Acceptance criteria The measured initial swivel play shall not exceed the value (S 1 ). Symbol Value Description S 1 4 mm maximum 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 Te
35、st values The test values are listed below. Symbol Value Description L 1 variable load capacity L 17 10 % of L 1 test load R variable measured electrical resistance 5.4.3 Tolerances The tolerances are: Symbol Tolerance Unit Acceptable L 1 N % 0 +2 L 17 N % 0 +2Page 6 EN 12531:1998 BSI 03-1999 5.4.4
36、Acceptance criteria The resistance R of the sample tested shall be: conductive castor(s) or wheel(s): R# 10 4 V; antistatic castor(s) or wheel(s): 10 5 # R# 10 7 V. 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 Tes
37、t values The test values are listed below. Symbol Value Description E 1 10 000 number of locking actions E 2 10 cycles per min L 3 800 N minimum load 5.5.3 Tolerances The tolerances are: Symbol Tolerance Unit Acceptable E 1 % 0 +1 E 2 cycles/min 22 0 5.5.4 Acceptance criteria The test is passed if t
38、here is no wear and/or permanent deformation which adversely affects the performance of the sample. 5.6 Efficiency check of wheel braking and/or locking 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. Symbol
39、 Value Description L 1 variable load capacity as test load K 1 40 % of L 1 horizontal tractive force 5.6.3 Tolerances The tolerances are: Symbol Tolerance Unit Acceptable L 1 N % 0 +2 K 1 N % 0 +4 The tolerance of the time of application of load (10 s) is: s. 0 +2 5.6.4 Acceptance criteria No revolv
40、ing movement around its axis is allowed when the force K 1 is applied. 5.7 Efficiency check of swivel braking and/or locking device 5.7.1 Test objectives, apparatus and procedures Detailed in 4.7 of EN 12527:1998. 5.7.2 Test values The test values are listed below. Symbol Value Description L 1 varia
41、ble load capacity as test load K 2 40 % of L 1 horizontal tractive force 5.7.3 Tolerances The tolerances are: Symbol Tolerance Unit Acceptable L 1 N % 0 +2 K 2 N % 0 +4 The tolerance of the time of application of load K 2 (10 s) is: s. 0 +2 5.7.4 Acceptance criteria No swivelling movement is detecte
42、d during the second application of the force K 2 . 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 are listed below. Symbol Value Description L 1 variable load capacity as test load y 1 3 load factor y 2 1 h time of
43、application of load y 3 24 h elapsed time prior to inspection 5.8.3 Tolerances The tolerances are: Symbol Tolerance Unit Acceptable L 1 N % 0 +2 y 2 h min 0 +15 y 3 h 1h 5.8.4 Acceptance criteria The test is passed if there is no permanent deformation of the sample, which adversely affects its perfo
44、rmance.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. Symbol Value Description L 1 variable load capacity as test load v 1 1,1 m/s (4 km/h) average speed v 2 1,1 m
45、/s (4 km/h) speed at impact h 1 height of obstacles for wheels with: height of obstacles tread hardness $ 908 Shore A: 2,5 % of D tread hardness 9 08Shore A: 5,0 % of D c 1 to 3 m distance between obstacles n 1 000 number of obstacles r 1 30 000 number of wheel revolutions z 1 3 min running period z
46、 2 max. 1 min pause period D variable wheel 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: Symbol Tolerance Unit Acceptable L 1 N % 0 +2 v 1 m/s % 0 +5 v 2 m/s % 0 +5 h 1 mm % 25 0 n % 0
47、 +1 r 1 % 0 +1 z 1 min 10 s z 2 min 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 sample, which adversely affects its performance. The red
48、uction 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 locking device Repeat test 5.7. 5.12 Final wheel play 5.12
49、.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 W 2 detailed in Table 4. Table 4 Wheel wear play Dimensions in millimetres Wheel diameter Maximum wheel wear play (D)( W 2 ) 100 0,50 125 0,62 150/160 0,75 200 1,00 250 1,25 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
