1、NF EN 1957DCEMBRE 2012Ce document est usage exclusif et non collectif des clients Saga Web.Toute mise en rseau, reproduction et rediffusion, sous quelque forme que ce soit,mme partielle, sont strictement interdites.This document is intended for the exclusive and non collective use of Saga Web custom
2、ers.All network exploitation, reproduction and re-dissemination,even partial, whatever the form(hardcopy or other media), is strictly prohibited.Saga WebPour : SIS - SHANGHAI INST STANDARDIZATIONClient : 23437513le : 16/05/2013 09:01w w 9 7 7 7 7 8 7 * $ 7 EUROPEAN STANDARD NORME EUROPENNE EUROPISCH
3、E NORMEN 1957 October 2012 ICS 97.140 Supersedes EN 1957:2000English Version Furniture - Beds and mattresses - Test methods for the determination of functional characteristics and assessment criteriaMeubles - Lits et matelas - Mthodes dessai pour la dtermination des caractristiques fonctionnelles et
4、 critres dvaluation Mbel - Betten und Matratzen - Prfverfahren zur Bestimmung der funktionellen Eigenschaften und Leistungskriterien This European Standard was approved by CEN on 18 August 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
5、for giving this EuropeanStandard the 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in thr
6、ee official versions (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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bo
7、dies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
8、pain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN
9、national Members. Ref. No. EN 1957:2012: E EN 1957:2012 (E) 2Contents PageForeword 31 Scope 42 Normative references 43 Terms and definitions .44 General test conditions .54.1 Preliminary preparation 54.2 Tolerances 54.3 Sequence of testing .55 Test apparatus .65.1 Floor surface 65.2 Stops .65.3 Stan
10、dard test bed base for mattresses (durability test) 65.4 Side support profile .65.5 Standard table/test board (measuring) 75.6 Loading pad 75.7 Equipment for recording the load/deflection curves .85.8 Equipment for the durability test .86 Functional characteristics 96.1 Measurable functional charact
11、eristics 96.2 Visual inspection .97 Test methods . 107.1 General . 107.2 Durability test 107.3 Load/deflection curve . 108 Evaluation of characteristic parameters 118.1 Determination of height loss . 118.2 Determination of hardness value 118.3 Determination of firmness rating 129 Durability of bed e
12、dge 1310 Test report . 13Annex A (informative) Basis of determination of firmness rating . 14 EN 1957:2012 (E) 3Foreword This document (EN 1957:2012) has been prepared by Technical Committee CEN/TC 207 Furniture, the secretariat of which is held by UNI. This European Standard shall be given the stat
13、us of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject
14、 of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1957:2000. The main change with respect to the previous edition is the correcting of the dimensions of the roller (Figure 3) to enable the roller to be manuf
15、actured. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fr
16、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 1957:2012 (E) 41 Scope This European Standard specifies test methods for th
17、e determination of the durability and hardness of mattresses and all types of fully erected beds with mattresses (and mattress pads when they form a unit with the mattress). It does not apply to water beds, air beds and children cots. It includes a method for the determination of the firmness rating
18、 of a mattress or a bed correlating to the subjective assessment made by people (see Annex A). It needs to be emphasized that the firmness rating cannot be used to demonstrate comfort and/or quality of a mattress or a complete bed. Ageing and degradation caused by air, light, humidity and temperatur
19、e is not included. The test results are only valid for the article tested. When test results are intended to be applied to other similar articles, the test specimen shall be representative of them. 2 Normative references The following documents, in whole or in part, are normatively referenced in thi
20、s document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1334, Domestic furniture Beds and mattresses Methods of measurement and recommended
21、 tolerancesEN 1725:1998, Domestic furniture Beds and mattresses Safety requirements and test methods3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 test unit mattress or mattress/bed combination 3.2 durability test test simulating the repeate
22、d application of loads and/or movement of components occurring during long-term use and assessing the strength of the article under such conditions and is a test is a procedure mainly intended to evaluate the change of the properties of the test unit caused by repeated loadings 3.3 load/deflection c
23、urve curves that are obtained by pressing a load pad into the test unit and measuring the associated value of indentation and force simultaneously 3.4 hardness value (H)determined from load/deflection measurement, in N/mm 3.5 firmness rating (Hs)expression of the subjective assessment by persons det
24、ermined from the hardness value upon results from empiric studies EN 1957:2012 (E) 53.6 height loss change in the height of a test unit, in mm, caused by the durability test 4 General test conditions 4.1 Preliminary preparation Unless otherwise specified by the manufacturer, the test unit shall be c
25、onditioned for at least one week in a standardised climate of (23 2) C and (50 5) % RH immediately prior to testing. Subsequent conditioning shall also take place in this climate. The tests shall be carried out at indoor ambient conditions but if during a test the temperature is outside the range 15
26、 C to 25 C the maximum and/or minimum temperature shall be recorded in the test report. During conditioning and handling, mattresses shall be kept flat and unloaded. If a test cannot be carried out as specified in this European Standard, e.g. because a loading pad cannot be used for the application
27、of a force due to the design of a product, the test shall be carried out as far as possible as specified. Complete beds shall be tested as delivered. Knock-down type beds shall be assembled according to the instruction supplied with the test unit. If the test unit can be assembled or combined in dif
28、ferent ways, the most adverse combination shall be used for the test. Knock-down fittings shall be tightened before testing. If necessary, mattress pads shall be prevented from moving during testing by a suitable means, e.g. adhesive tape or pins. In cases where bed bases are adjustable in hardness,
29、 the setting during the test shall be recorded in the test report. If the production information states that the mattress has a soft side and a firm side, both sides shall be tested using separate mattresses. 4.2 Tolerances Unless otherwise stated the following tolerances are applicable to the test
30、equipment: a) all forces shall have an accuracy of 5 % of the nominal force; b) all masses an accuracy of 0,5 % of the nominal mass; c) all dimensions an accuracy of 1 mm of the nominal dimension; d) the tolerance for position of loading pads shall be 5 mm. NOTE For the purposes of uncertainty measu
31、rement, test results are not considered to be adversely affected when the above tolerances are met. 4.3 Sequence of testing All tests shall be carried out on the same test unit and in the following sequence: a) conditioning, at least one week (according to 4.1); b) durability pre-conditioning: 100 c
32、ycles (according to 7.2); EN 1957:2012 (E) 6c) conditioning, at least 5 h (according to 4.1); d) measurement of unit height (according to 8.1) at 100 cycles and hardness measurement (according to 7.3 and 8.2) beginning within 5 min from moving the mattress from the standardised climate (according to
33、 4.1); e) durability test : 29 900 cycles (according to 7.2); f) conditioning, at least 5 h (according to 4.1)1);g) determination of hardness (according to 8.2) and height loss between 100 cycles and after the test (according to 8.1); h) bed edge test: 1) durability test at 100 cycles (according to
34、Clause 9); 2) measurement of unit height at 100 cycles (according to 8.1); 3) durability test on bed edge: 4 900 cycles (according to Clause 9); 4) measurement of unit height and height loss (according to 8.1). 5 Test apparatus 5.1 Floor surface Rigid, horizontal and flat. 5.2 Stops Stops shall be u
35、sed to prevent a complete bed or bed frame from sliding but not tilting and shall be no higher than 12 mm except in cases where the design of the bed necessitates the use of higher stops, in which case the lowest that will prevent the bed from moving, shall be used. 5.3 Standard test bed base for ma
36、ttresses (durability test) Rigid, horizontal, flat and smooth. 5.4 Side support profile If the mattress is not prevented from moving during the durability test by the bed structure, it shall be prevented from moving by two side support profiles as illustrated in Figure 1. The internal distance betwe
37、en the supports (Ws) shall be equal to the width of the mattress measured according to EN 1334, 2 mm. The height of the support profiles (h) shall not exceed one third of the mattress thickness (H), measured according to EN 1334. The length of the support profiles shall be at least equal to the leng
38、th of the test unit. If necessary, mattress pads shall be fixed during the tests by a suitable manner. 1) Intermediate measurements may be carried out under these conditions. EN 1957:2012 (E) 7Key 1 standard test bed base 4 side support profile 2 side support profile 5 mattress 3 roller 6 enlargemen
39、t of side support profile (2) H height of mattress h height of support profiles Ws distance between supports Figure 1 Side support profile 5.5 Standard table/test board (measuring) Horizontal, flat and smooth surface, large enough to fully support the mattress in any measuring position. At the loadi
40、ng position, the deflection shall not exceed 1 mm under 1000 N load. The overall flatness tolerance of the test board shall be 2 mm/1000 mm. 5.6 Loading pad Rigid circular object 355 mm in diameter the face of which has a convex spherical curvature of 800 mm radius with a 20 mm front edge radius (see Figure 2). The loading pad shall have a smooth surface and shall be mounted to the l
