EN 1022-2005 en Domestic Furniture - Seating - Determination of Stability《居室家具 座椅 稳定性测定》.pdf

1、BRITISH STANDARDBS EN 1022:2005Domestic furniture Seating Determination of stabilityThe European Standard EN 1022:2005 has the status of a British StandardICS 97.140g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g

2、48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 1022:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 6 September 2005 BSI 6 September 2005ISBN 0 580 46498 9National forewordThis British Standard is the official Engl

3、ish language version of EN 1022:2005. It supersedes BS EN 1022:1997 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee FW/0, Furniture, which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its

4、 secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Ca

5、talogue or of British Standards Online.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 does not of itself confer immunity from legal obligations. aid enquirers to understand

6、the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front co

7、ver, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NO

8、RM EN 1022 June 2005 ICS 97.140 Supersedes EN 1022:1996 English version Domestic furniture - Seating - Determination of stability Mobilier domestique - Siges - Dtermination de la stabilit Wohnmbel - Sitzmbel - Bestimmung der StandsicherheitThis European Standard was approved by CEN on 26 May 2005. C

9、EN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this 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 ap

10、plication to the Central Secretariat or to any CEN member. This European Standard exists in three 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 Central Secretariat ha

11、s the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Sl

12、ovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserved world

13、wide for CEN national Members. Ref. No. EN 1022:2005: EEN 1022:2005 (E) 2 Contents Page Foreword4 1 Scope 5 2 Terms and definitions .5 3 General test conditions.5 4 Test equipment 6 5 Determination of seat and back loading points7 6 Test procedure and requirements, all seating: experimental method .

14、10 7 Test procedures and requirements for seating with variable geometry: experimental method 13 8 Calculative method20 9 Test report 21 EN 1022:2005 (E) 3 Foreword This European Standard (EN 1022:2005) has been prepared by Technical Committee CEN/TC 207 “Furniture”, the secretariat of which is held

15、 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 December 2005, and conflicting national standards shall be withdrawn at the latest by December 2005. This document supersedes EN 1022:1996.

16、 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, L

17、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1022:2005 (E) 4 1 Scope This European Standard specifies test methods and requirements for the determination of the stability of all types of domestic seating for

18、 adults. The European Standard does not apply to adjustable geometry seating where the backrest is at an angle of 10 or less to the horizontal. Stability can be determined by either the experimental or the calculative method. Both methods are based on the same forces and points of application. The c

19、alculative method does not apply to seating, which have variable geometry and to seating, which visibly flex under the applied loads. If the result of the calculative method is uncertain or marginal the result shall be checked, if possible, by the experimental method. 2 Terms and definitions For the

20、 purposes of this European Standard, the following terms and definitions apply: 2.1 stability ability to withstand forces that tend to cause the loaded seating to overturn 2.2 load bearing structure any part of a chair, which as its primary function supports a portion of the loads exerted by the sit

21、ter, e.g. the seat frame but not the upholstery 2.3 footrest part of the structure of a chair intended to support the feet of the sitter 3 General test conditions 3.1 General No prior conditioning is required. The furniture shall be tested as delivered. The tests shall be carried out in the configur

22、ation most likely to cause overturning. Knock-down furniture shall be assembled according to the instructions supplied with it. If the furniture can be assembled or combined in different ways, the most adverse configuration shall be used for each test. Knock-down fittings shall be tightened before t

23、esting. Stools shall be tested for forwards overturning in all directions. The other stability tests are not applicable. The test results are only valid for the tested seating. When the test results are intended to be applied to production models, the tested seating shall be representative of the pr

24、oduction model. In the case of designs not catered for in the test procedures, the tests shall be carried out as far as possible as described and deviations from the test procedure recorded in the test report. EN 1022:2005 (E) 5 3.2 Tolerances Unless otherwise stated: all forces shall have an accura

25、cy of 5 % of the nominal force. all masses an accuracy of 0,5 % of the nominal mass. all dimensions an accuracy of 1 mm of the nominal dimension. all angles an accuracy of 2 the nominal angle. The tolerance for positioning of loading pads shall be 5 mm. The tests are described in terms of the applic

26、ation of forces. Masses can however be used. The relationship 10 N = 1 kg may be used for this purpose. 4 Test equipment 4.1 General Except otherwise specified, the tests may be applied by any suitable device, because results are dependent on correctly applied loads and not upon the apparatus. The t

27、est equipment shall not hinder any deformation of the seating being tested. All loading pads shall be capable of pivoting in relation to the direction of the applied force and the pivot point shall be as close as practically possible to the load surface. 4.2 Loading pad Rigid circular object 200 mm

28、in diameter with a face having a convex spherical curvature of 300 mm radius with a 12 mm edge radius. The loading pad shall be mounted on a device, which can apply a vertical force as specified. 4.3 Horizontal force application device A device, which can apply a force either at a given value or at

29、a gradually increasing value, e.g. a spring balance. 4.4 Loading discs Discs with a mass of 10 kg each, diameter 350 mm and a thickness of 48 mm. 4.5 Support apparatus An apparatus to support the main stack of the loading discs in reclining chair tests. It shall be as light as possible and not heavi

30、er than 2,5 kg. Figure 1 shows a basic design. EN 1022:2005 (E) 6 Dimensions in millimetres Figure 1 Support apparatus 4.6 Loading point template A template, which consists of two shaped members fastened together by a pivot at one end (Figures 2 and 3). The contours of the shaped surfaces are so dev

31、ised as to sink into the upholstery. For this purpose the seat loading arm shall have a mass of 20 kg applied at the seat loading point. The apparatus is marked as shown in Figure 3. 4.7 Stops Stops shall be of the minimum height required to prevent sliding and shall not inhibit overturning. 4.8 Flo

32、or surface Horizontal, flat, rigid and with a smooth surface. 5 Determination of seat and back loading points The seat and back loading points shall be determined using the loading point template (4.6) as specified below. In some cases it may not be possible to determine the loading points by means

33、of the loading point template. In such cases, the loading points of 175 mm forward of the seat/back junction and 300 mm upward from the seat/back junction shall be used. Position the loading point template (4.6) on the fore and aft centreline as far towards the rear as possible with its load applied

34、 at the seat loading point. EN 1022:2005 (E) 7 Scale: 1 square = 20 mm Key 1 Rear 2 Front 3 Top 4 Bottom 5 Seat loading point 6 Back loading point 7 Pivot point A Seat portion B Back portion Figure 2 Loading surface curves for seat and back loading point template EN 1022:2005 (E) 8 Dimensions in mil

35、limetres Key 1 Typical section 2 Straight edge for determination of seat or back inclination 3 Mark to fix 90 A Seat loading point (chairs) B Back loading point (chairs) Figure 3 Loading point template Adjust its position by pushing the back portion into the back, so levering the seat portion forwar

36、ds until the shape of the loading point template correlates with that of the seat. In cases where the loading point template can be settled in more than one position, the position having the smallest angle between the seat and back portions of the loading point template shall be used. The angle shal

37、l in no cases be less than 90. Mark the loading points from the loading point template. When a seating has more than one sitting place, repeat the procedures on the other sitting places. If the number of sitting places in the seating is not obvious, divide the total seat length (in millimetres) by 6

38、00 and round to the nearest whole number to determine the number of places. Divide the total seat length into that number of places of equal length. EN 1022:2005 (E) 9 6 Test procedure and requirements, all seating: experimental method 6.1 Requirements When tested according to Clause 6, the seating

39、shall not overturn. 6.2 Forwards overbalancing, all seating Position the seating on the floor surface (4.8) with the front legs or base restrained by stops (4.7). Apply a force of 600 N vertically (for multiple sitting places to a maximum of 2 places) by means of the loading pad (4.2) acting at thos

40、e points 60 mm behind the front edge of the load bearing structure most likely to result in overturning. At each loaded position apply a force F of 20 N for at least 5 s horizontally outwards along a horizontal line extended forward from the point where the base of the loading pad meets the upper su

41、rface of the seat (Figure 4). For calculative method see Clause 8. 6.3 Forwards overturning for seating with footrest For seating with footrests repeat the procedure in 6.2 applying the vertical and horizontal loads to the footrests. For footrests of tubular construction the loads shall be applied a

42、long the centre line of the tube. 6.4 Sideways overbalancing, all seating without arms Position the seating on the floor surface (4.8) with the side legs or base restrained by stops (4.7). Apply a force of 600 N vertically by means of the loading pad at those points 60 mm behind the edge of the load

43、 bearing structure of the side nearest the stopped feet most likely to result in overturning. Apply a sideways force F of 20 N horizontally outwards for at least 5 s along a line from the point where the base of the loading pad meets the upper surface of the seat (Figure 5). For calculative method s

44、ee Clause 8. 6.5 Sideways overbalancing, all seating with arms Position the seating on the floor surface (4.8) with the side legs or base restrained by stops (4.7). Apply a vertical force F of 350 N by means of the loading pad (4.2) at a position on the centre line of the arm up to a maximum 40 mm i

45、nwards from the outer edge of the arm structure at the most adverse position along its length. Apply a vertical force of 250 N at a point 100 mm to the side of the fore and aft centre line of the seat (Figure 6) which is nearest the stopped feet and at the same distance from the backrest as the arm

46、loads. Apply a horizontal force F of 20 N outwards, and perpendicular to the line joining the stopped feet, for at least 5 s, at the upper surface of the armrest in line with the vertical arm force and on the side with stopped feet (Figure 6). For calculative method see Clause 8. EN 1022:2005 (E) 10

47、 6.6 Rearwards overbalancing, all seating with backs This sub-clause only applies to seating with backs extending 50 mm or more above the unloaded seat. Position the seating on the floor surface (4.8) with the rear legs or base restrained by stops (4.7). All adjustable backs shall be set in their mo

48、st upright position. Apply a vertical force of 600 N to the seat by means of the loading pad (4.2) at the seat loading point (A) determined by the loading point template. Determine the distance (H) in millimetres between the loaded seat and the floor. For seating having a value of H 720mm use a forc

49、e F of 80 N. For seating having a value of H 720 mm calculate the force F, in newtons, required from the following formula: F = 0,2857 (1000-H) where: H is in millimetres F is in newtons. Apply the force F horizontally for at least 5 s in a rearward direction to the back of the seating at the point (B) determined by the loading point template, or at the top edge of the back rest, whichever is the lower (Figure 7). When the seating has more than one sitting place, carry out the procedure on two most adverse sitting places simultaneously. Fo