BS EN 14703-2007 Furniture - Links for non-domestic seating linked together in a row - Strength requirements and test methods《家具 非家用座椅连成一排的链接 强度要求和试验方法》.pdf

1、BRITISH STANDARDBS EN 14703:2007Furniture Links for non-domestic seating linked together in a row Strength requirements and test methodsThe European Standard EN 14703:2007 has the status of a British StandardICS 97.140g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g5

2、4g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 14703:2007This British Standard was published under the authority of the Standards Po

3、licy and Strategy Committee on 31 May 2007 BSI 2007ISBN 978 0 580 50700 7National forewordThis British Standard was published by BSI. It is the UK implementation of EN 14703:2007.The UK participation in its preparation was entrusted to Technical Committee FW/0, Furniture.A list of organizations repr

4、esented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments

5、 issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14703April 2007ICS 97.140English VersionFurniture - Links for non-domestic seating linked together in arow - Str

6、ength requirements and test methodsAmeublement - Assemblages pour siges usage nondomestique assembls en une range - Exigences dersistance et mthodes dessaiMbel - Verbindungselemente fr Reihenbestuhlung frden Nicht-Wohnbereich - Festigkeitsanforderungen undPrfverfahrenThis European Standard was appro

7、ved by CEN on 15 March 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstan

8、dards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to

9、 the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nethe

10、rlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in

11、any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14703:2007: ELicensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Princip

12、le of link performance .5 5 General test conditions.5 6 Test equipment and apparatus.6 7 Test procedure.11 8 Test report 13 Bibliography 14 Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 3 Foreword This document (EN 14703:2007) has been p

13、repared by Technical Committee CEN/TC 207 “Furniture”, the secretariat of which is held by UNI. 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 October 2007, and conflicting national standards sha

14、ll be withdrawn at the latest by October 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germ

15、any, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:

16、2007 (E) 4 1 Scope This European Standard specifies strength requirements and test methods for the links used for non-domestic seating, which can be linked together in a row. This European Standard does not specify strength or durability requirements for individual chairs as these are contained with

17、in EN 15373. Assessment of ageing and degradation is not included. Tests carried out according to this European Standard are intended to demonstrate the ability of the links to function correctly in their intended environment. It should be understood that fulfilling the requirements does not ensure

18、that the links will operate as expected in circumstances or emergencies that cannot be foreseen. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest

19、edition of the referenced document (including any amendments) applies. Not applicable 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 linked seating single chairs fitted with means whereby they can be linked together in a row or separated and

20、 used singly or stored. NOTE Seating mounted on beams or fixed to the floor or wall of a building is not linked seating 3.2 positive links links which remain linked if the chairs are overturned or lifted up 3.3 gravity links links which link each chair to the previous one when the chair is put down.

21、 This type of link will disengage when the chair is lifted up 3.4 structure load bearing parts of furniture including the frame, seat, back, arm supports and suspension 3.5 static test test consisting of heavy loads being applied a few times to ensure that the furniture has sufficient strength to pe

22、rform its function under the highest levels of loading that might reasonably be expected to occur 3.6 impact test test to assess the strength of the article under the rapid rates of loading that occasionally occur Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c

23、) BSIEN 14703:2007 (E) 5 4 Principle of link performance There are two options for the performance of chair links subjected to heavy loads: a) chairs shall stay linked (7.3.1 option A), or b) chairs shall disengage (7.3.1 option B). 5 General test conditions 5.1 General The tests are designed to be

24、applied to linked seating that is fully assembled and ready for use. The tests consist of the application, to various parts of the item, of loads or forces simulating normal functional use and foreseeable emergency situations. The tests are designed to evaluate properties without regard to materials

25、, design/construction or manufacturing processes. The test results are only valid for the article tested. When the test results are intended to be applied to other similar articles, the test specimen shall be representative of the production model. In the case of designs not catered for in the test

26、procedures, the test shall be carried out as far as possible as described, and deviations from the test procedure recorded in the test report. 5.2 Preliminary preparation The furniture shall be tested as delivered. Knock-down furniture shall be assembled according to the instructions supplied with i

27、t. The furniture shall be assembled and/or configured according to the instructions supplied. If the furniture can be assembled or combined in different ways, the most adverse combination shall be used for each test. Knock-down fittings shall be tightened before testing and further tightening shall

28、not take place unless specifically required by the manufacturer. The tests shall be carried out in indoor ambient conditions but if during a test the atmospheric temperature is below 15 C or above 25 C the maximum and/or minimum temperature shall be recorded in the test report. 5.3 Application of fo

29、rces Unless otherwise stated static loads shall be maintained for a period of (10 2) s. 5.4 Tolerances For tolerances, unless otherwise stated: forces shall have an accuracy of 5 % of the nominal force; masses an accuracy of 0,5 % of the nominal mass; dimensions an accuracy of 1,0 mm of the nominal

30、dimension. The tolerance for the positioning of loading pads shall be 5 mm. Forces may be replaced by masses. The relationship 1 kg = 10 N shall be used for this purpose. Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 6 6 Test equipment a

31、nd apparatus 6.1 General The tests may be applied by any suitable device because results are dependent only upon correctly applied loads and not upon the apparatus, except in the case of impact tests where the apparatus described in 6.5 shall be used. The equipment shall not inhibit the deformation

32、of the chair during testing. It shall be able to move so that it can follow the deformation of the chair during testing, so that the loads are always applied at the specified point and in the specified direction. All loading pads shall be capable of pivoting in relation to the direction of the appli

33、ed force and the pivot point shall be as close as practically possible to the load surface. Key A seat load B back load Figure 1 Position of loading point template Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 7 Key Scale: 1 square = 20

34、mm 1 rear 2 seat load 3 seat portion 4 front 5 top 6 back portion 7 back load 8 bottom 9 pivot point Figure 2 Loading surface curves for seat and back loading point template Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 8 Dimensions in m

35、illimetres Key A seat load B back load 1 typical section 2 mark to fix 90 3 straight edge for determination of seat or back inclination Figure 3 Loading point template Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 9 6.2 Floor, horizontal

36、, flat and rigid with a smooth surface. 6.3 Stops, to prevent the article from sliding but not tilting, no higher than 12 mm except in cases where the design of the item necessitates the use of higher stops, in which case the lowest that will prevent the item from sliding shall be used. 6.4 Local lo

37、ading pad, (i.e. for loading tops of backs or fronts of seats), rigid cylindrical object 100 mm in diameter, with a flat face and a 12 mm edge radius. 6.5 Foam for use with loading pads, 25 mm thick layer of flexible foam with a bulk density of (120 25) kg/m. The foam shall be attached to the faces

38、of the loading pads or alternatively positioned between the loading pad and the test structure. 6.6 Horizontal impact device, consisting of a WBA standard basketball size 5, (see Note 1), inflated to a pressure of (73,5 5) kPa and attached by a network of elastic cords to the ball mounting ring. The

39、 ball seating shall consist of a ring of timber (or timber derivative) having an outside diameter of 150 mm and an inside diameter of 90 mm. Its rear face shall be attached to the main body of the impactor and its front face shaped to fit the ball. The main body of the impactor shall consist of a ma

40、ss supported by cords or flexible wires 850 mm long so that the longitudinal axis of the ball, mounting ring and main body assembly shall remain horizontal when the support cords are displaced from the vertical. The main body of the impactor shall be of such a mass that the total mass of all moving

41、parts, excluding the support cords, shall be 50 kg. The impactor is illustrated in Figure 4. NOTE Basketballs approved by the WBA should be marked as such on the product. Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 10 Dimensions in mil

42、limetres Key a) general view b) suggested construction c) detail of ball mounting ring 1 safety clamp 2 mass 3 disc weights 4 ball mounting ring 5 basketball 6 elastic cords Figure 4 Horizontal impact device Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIE

43、N 14703:2007 (E) 11 7 Test procedure 7.1 General Whenever a loading pad (6.4) is used a layer of foam (6.5) shall be placed between the pad and the chair structure. 7.2 Row displacement test The test shall be carried out on an assembly of eleven chairs linked together. Stops (6.3) shall be placed so

44、 as to prevent forward or rearward movement of the two end chairs. If necessary sufficient weight to prevent the row from overturning shall be shared equally on the two end seats only. Apply a horizontal force of 200 N rearwards to the centre of the front edge of the seat structure of the central se

45、at measure the distance from the front legs at the centre of the row to a line joining the front legs at the end of the row (see Figure 5). Repeat the procedure with horizontal forward force of 200 N applied to the rear edge of the seat structure of the central seat. The displacement of the centre p

46、oint of a row shall not be greater than 200 mm rearward or 200 mm forwards from the straight line (or the nominal radius of circumference when the links are designed to hold the chairs in a curved row rather than a straight row). Key 1 rearwards displacement Figure 5 Row Displacement Test (rearwards

47、 displacement shown) Licensed Copy: Wang Bin, na, Tue Aug 21 01:13:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14703:2007 (E) 12 7.3 Link strength 7.3.1 General These tests relate to the performance of links in an emergency situation. When tested according to 7.3.2 and 7.3.3 the links shall sati

48、sfy the same option in both tests. The links shall either fulfil the requirements of Option A or Option B as follows: (see Clause 4). Option A The linking mechanism and the chair structure may be damaged in this test, but the row shall remain intact. Option B At least one chair shall become disengag

49、ed from another. 7.3.2 Overturning test The test shall be carried out on an assembly of eleven chairs linked together. Stops (6.3) shall be placed to prevent forward and rearward movement of the two end chairs only. Apply force rearwards to the centre of the top of the back of the central seat sufficiently large to overturn the row. Repeat the procedure with a force forwards to the centre of the top of the back of the central seat sufficiently large to overturn the row. 7.3.3 Horizontal impact test The test shall be carried out on an