1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1957:2012Furniture Beds andmattresses Test methods forthe determination of functionalcharacteristics and assessmentcriteriaBS EN 1957:2012 BRITISH STANDARDNational foreword
2、This British Standard is the UK implementation of EN 1957:2012. Itsupersedes BS EN 1957:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FW/0/2, Domestic and Contract Furniture.A list of organizations represented on this committee can beobtained on
3、request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 70179 5ICS 97.140Compliance with a British S
4、tandard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate Text affectedBS EN 1957:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1957
5、October 2012 ICS 97.140 Supersedes EN 1957:2000English Version Furniture - Beds and mattresses - Test methods for the determination of functional characteristics and assessment criteria Meubles - Lits et matelas - Mthodes dessai pour la dtermination des caractristiques fonctionnelles et critres dval
6、uation 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 for giving th
7、is European Standard 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 three official
8、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 bodies of Aust
9、ria, 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, Spain, Swede
10、n, 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 national Me
11、mbers. Ref. No. EN 1957:2012: EBS EN 1957:2012EN 1957:2012 (E) 2 Contents Page Foreword 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
12、 Standard 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 ch
13、aracteristics 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
14、bed edge 1310 Test report . 13Annex A (informative) Basis of determination of firmness rating . 14BS EN 1957:2012EN 1957:2012 (E) 3 Foreword 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 s
15、hall be given the status 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 docum
16、ent may be the subject 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
17、the roller to be manufactured. 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 Rep
18、ublic of Macedonia, France, 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. BS EN 1957:2012EN 1957:2012 (E) 4 1 Scope This European
19、Standard specifies test methods for the 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 th
20、e determination of the firmness rating 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
21、by air, light, humidity and temperature 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 p
22、art, are normatively referenced in this 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
23、Methods of measurement and recommended tolerances EN 1725:1998, Domestic furniture Beds and mattresses Safety requirements and test methods 3 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 dur
24、ability test test simulating the repeated 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
25、 repeated loadings 3.3 load/deflection curve 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 o
26、f the subjective assessment by persons determined from the hardness value upon results from empiric studies BS EN 1957:2012EN 1957:2012 (E) 5 3.6 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 otherwi
27、se specified by the manufacturer, the test unit shall be conditioned 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 bu
28、t if during a test the temperature is outside the range 15 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.
29、 because a loading pad cannot be used for the application 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
30、unit. If the test unit can be assembled or combined in different 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
31、pins. In cases where bed bases are adjustable in hardness, 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 s
32、tated the following tolerances are applicable to the test 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
33、 shall be 5 mm. NOTE For the purposes of uncertainty measurement, 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
34、 (according to 4.1); b) durability pre-conditioning: 100 cycles (according to 7.2); BS EN 1957:2012EN 1957:2012 (E) 6 c) 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
35、5 min from moving the mattress from the standardised climate (according to 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
36、 to 8.1); h) bed edge test: 1) durability test at 100 cycles (according to 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 apparat
37、us 5.1 Floor surface Rigid, horizontal and flat. 5.2 Stops Stops shall be used 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 pr
38、event the bed from moving, shall be used. 5.3 Standard test bed base for mattresses (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 si
39、de support profiles as illustrated in Figure 1. The internal distance between 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 1
40、334. The length of the support profiles shall be at least equal to the length 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. BS EN 1957:2012EN 1957:2012 (E) 7 Key 1 standard t
41、est bed base 4 side support profile 2 side support profile 5 mattress 3 roller 6 enlargement of side support profile (2) H height of mattress h height of support profiles Wsdistance between supports Figure 1 Side support profile 5.5 Standard table/test board (measuring) Horizontal, flat and smooth s
42、urface, large enough to fully support the mattress in any measuring position. At the loading 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
43、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 loading system of the test machine (5.7) by a ball joint as close as possible to the indentor surface (see Figure 2). BS EN 1
44、957:2012EN 1957:2012 (E) 8 Dimensions in millimetres Key 1 ball joint as low as possible Figure 2 Loading pad 5.7 Equipment for recording the load/deflection curves The equipment for recording the load/deflection curves shall be a loading pad (5.6) and a testing machine capable of applying a vertica
45、l downward load up to 1000 N. The travel speed for both loading and unloading shall be (90 5) mm/minute. Load and height with reference to a fixed datum shall be measured. The accuracy of the height measuring system shall be 0,5 mm or better. The accuracy of the load measuring system shall be 1 % of
46、 the max load (1000 N) or better. The equipment shall be so that horizontal forces do not influence the measurement. 5.8 Equipment for the durability test The equipment consists of a roller with dimensions and a shape illustrated in Figure 3 and a mechanism capable of relative horizontal movement of
47、 the roller on the unit surface. The roller surface shall be hard, smooth and without scratches or other surface defects. The total rolling system shall apply a load of (1400 7) N measured in the static condition. The roller shall have a rotation moment of inertia of 0,5 kgm 0,05 kgm. The roller sha
48、ll be free to pivot along its longitudinal and lateral axis relative to the horizontal. The roller shall be capable of following the surface of the mattress, and it shall be free to move up and down to follow the mattress surface. The forces on the roller shall act horizontally (see 7.2) at the cent
49、re point. The motion shall be approximately sinusoidal (within 10 %) and symmetrical along the longitudinal symmetry axis of the unit. The frequency shall be (16 2) cycles per minute. BS EN 1957:2012EN 1957:2012 (E) 9 Dimensions in millimetres Figure 3 Roller 6 Functional characteristics 6.1 Measurable functional characteristics The measurable functional characteristics are determined or calculated before and after the durability test (see 7.2) and are ba
