1、 Reference number ISO 21015:2007(E) ISO 2007INTERNATIONAL STANDARD ISO 21015 First edition 2007-06-15 Office furniture Office work chairs Test methods for the determination of stability, strength and durability Mobilier de bureau Siges de travail de bureau Mthodes dessai pour la dtermination de la s
2、tabilit, de la rsistance et de la durabilit ISO 21015:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on t
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5、orm the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, withou
6、t permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All right
7、s reservedISO 21015:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 General test conditions 2 4.1 Preliminary preparation . 2 4.2 Test equipment . 3 4.3 Application of forces 3 4.4 Tolerances . 3 4.5 Sequence of t
8、esting 3 4.6 Inspection and assessment of results 3 5 Test apparatus 5 5.1 Test surface. 5 5.2 Stops 5 5.3 Seat-loading pad. 5 5.4 Smaller seat-loading pad . 6 5.5 Local loading pad . 6 5.6 Back-loading pad 6 5.7 Arm-rest durability test apparatus 7 5.8 Strap. 8 5.9 Stability-loading device 9 5.10 L
9、oading discs 9 5.11 Test surface for castor durability 9 6 Loading points 9 6.1 Loading point A. 9 6.2 Loading point B. 9 6.3 Loading point C. 9 6.4 Loading point D. 10 6.5 Loading point E. 10 6.6 Loading point F. 10 6.7 Loading point G 10 6.8 Loading point H. 10 6.9 Loading point J . 10 7 Test meth
10、ods. 11 7.1 Stability 11 7.2 Static-load tests 15 7.3 Durability tests 17 8 Test report . 19 Annex A (informative) Guidance for the choice of forces, cycles, etc., for stability, strength and durability tests General principles . 20 Annex B (normative) Seat-loading pad data 23 Annex C (normative) St
11、ability-loading device data 26 ISO 21015:2007(E) iv ISO 2007 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
12、ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates
13、 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards.
14、 Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this
15、document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21015 was prepared by Technical Committee ISO/TC 136, Furniture. INTERNATIONAL STANDARD ISO 21015:2007(E) ISO 2007 All rights reserved 1 Office furniture Office work cha
16、irs Test methods for the determination of stability, strength and durability 1 Scope This International Standard specifies test methods for determining the stability, strength and durability of office work chairs. Guidance is given on the choice of forces, cycles, etc., for these tests. The tests ar
17、e designed to be applied to an article of furniture that is fully assembled and ready for use. The dimensions in the tests are applicable to office work chairs intended for adult persons. The tests consist of the application, to various parts of the item, of forces simulating normal functional use,
18、as well as misuse that can reasonably be expected to occur. The tests are designed to evaluate properties without regard to materials, design/construction or manufacturing processes. The test results are valid only for the article tested. When the test results are intended to be applied to other sim
19、ilar articles, it is important that the test specimen be representative of the production model. Tests carried out according to this International Standard are intended to demonstrate the ability of the item to give satisfactory service in its intended environment. The tests have been developed for
20、units/components that have not been in use. However, when properly justified, they can be used for fault investigation. Data are given for the design of seat-loading pads (Annex B) and for the design of stability-loading pad (Annex C). This International Standard does not give any product requiremen
21、ts. These can be specified in a requirements document. If this is not available, possible forces and cycles are suggested in Annex A (informative). These forces and cycles can be used for adults regardless of their weight and number of working hours. This International Standard does not specify type
22、 approval tests for chair components. Assessment of ageing and degradation is not included. The tests are not intended to assess the durability of upholstery, i.e. filling materials and covers. 2 Normative references The following referenced document is indispensable for the application of this docu
23、ment. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 22880:2004, Castors and wheels Requirements for castors for swivel chairs ISO 21015:2007(E) 2 ISO 2007 All rights reserved3 Terms
24、and definitions For the purposes of this document, the following terms and definitions apply. 3.1 office work chair piece of seating furniture for one person, with a back rest, with or without arm rests, whose upper part, which includes the seat, can rotate in the horizontal plane and can be adjuste
25、d in height NOTE Other adjustments may be included. 3.2 column office work chair component that connects the base and the seat structure NOTE A column normally incorporates a seat-height adjustment and swivel mechanism. 3.3 locking device device that inhibits the movement of the seat action and/or t
26、he back rest 3.4 arm-rest length distance between vertical lines through its front and rear edges NOTE In the case of an arm rest that is not horizontal or that is curved, the length is measured in a horizontal plane 20 mm below the highest point of the arm rest. 3.5 supporting point castor or glide
27、 NOTE There are two castor types as defined in ISO 22880:2004. a) Type H: Castors with plain wheels defined as type H, hard tread. The wheel is one colour over the entire surface. These castors are suitable for carpeted floors. b) Type W: Castors with resilient tyred wheels defined as type W, soft t
28、read. This is of clearly different colour to the wheel centre. These castors are suitable for hard stone, wooden or tiled floors or those featuring non- textiled covering. 4 General test conditions 4.1 Preliminary preparation The unit shall be assembled and/or configured according to the instruction
29、s supplied with it. The most adverse configuration shall be used for each test (see Table 1). For testing a range of related chair models, it is necessary to test only the worst case(s). If mounting or assembly instructions are not supplied, the mounting or assembly method shall be recorded in the t
30、est report. Fittings shall not be re-tightened unless specifically required by the manufacturer. If it is necessary to change the configuration to produce the worst case conditions, any re-tightening of the fittings shall be recorded in the test report. Unless otherwise stated, all tests shall be ca
31、rried out on the same sample. The tests shall be carried out in indoor ambient conditions. If during a test the temperature is outside of the range of 15 C to 25 C, the maximum and/or minimum temperature shall be recorded in the test report. In the case of designs not addressed in the test procedure
32、s, the test shall be carried out as far as possible as described, and deviations from the test procedure recorded in the test report. ISO 21015:2007(E) ISO 2007 All rights reserved 3 Before beginning the testing, visually inspect the unit thoroughly. Record any defects so that they are not assumed t
33、o have been caused by the tests. Carry out measurements if specified. 4.2 Test equipment Unless otherwise specified, the tests may be applied by any suitable device because results are dependent only upon correctly applied forces and not on the apparatus. The equipment shall not inhibit deformation
34、nor cause unnatural deformation of the unit/component, i.e. it shall be able to move so that it can follow the deformation of the unit/component during testing. All loading pads shall be capable of pivoting in relation to the direction of the applied force. The pivot point shall be as close as pract
35、ically possible to the load surface. 4.3 Application of forces The forces in the static-load tests shall be applied sufficiently slowly to ensure that negligible dynamic force is applied. Each force shall be maintained for not less than 10 s and not more than 15 s. The forces in durability tests sha
36、ll be applied at a rate to ensure that excessive heating does not occur. Each force shall be maintained for (2 1) s. The forces may be applied using masses. 4.4 Tolerances Unless otherwise stated, the following tolerances are applicable: a) Forces: 5 % of the nominal force; b) Masses: 1 % of the nom
37、inal mass; c) Dimensions: 5 mm of the nominal dimension on soft surfaces; 1 mm of the nominal dimension on all other surfaces; d) Angles: 2 of the nominal angle. The accuracy for the positioning of loading pads shall be 5 mm. 4.5 Sequence of testing All applicable tests shall be carried out on the s
38、ame sample and in the sequence that the clauses are numbered in this International Standard. 4.6 Inspection and assessment of results After completion of each test, inspect the unit again. Record any changes including the following: a) fracture of any component or joint; b) loosening, which can be d
39、emonstrated by hand pressure, of any joint intended to be rigid; c) deformation or wear of any part or component such that its function is impaired; d) loosening of any means of fixing components to the unit; e) changes that can affect stability. ISO 21015:2007(E) 4 ISO 2007 All rights reservedTable
40、 1 Positioning of chair components Clause Test Seat height Seat Back rest in height Back rest in depth Tilt stiffness adjustment Castors and base Arm rest Foot rest 7.1.1 Front edge overturning highest position foremost position highest position foremost position maximum tension most likely to cause
41、 overturning most likely to cause overturning 7.1.2 Forwards overturning highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning 7.1.3 Forwards overturning for chairs with foot rest highest position forem
42、ost position lowest position foremost position maximum tension most likely to cause overturning most likely to cause overturning most likely to cause overturning 7.1.4 Sideways overturning for chairs without arm rests highest position foremost position highest position foremost position maximum tens
43、ion most likely to cause overturning 7.1.5 Sideways overturning for chairs with arm rests highest position foremost position highest position foremost position maximum tension most likely to cause overturning most likely to cause overturning 7.1.6 Rearwards overturning of chairs without back-rest in
44、clination highest position rearmost position highest position rearmost position minimum tension most likely to cause overturning most likely to cause overturning 7.1.7 Rearwards overturning of chairs with back-rest inclination highest position rearmost position highest position rearmost position min
45、imum tension most likely to cause overturning most likely to cause overturning 7.2.1 Seat front-edge static-load test highest position foremost position 7.2.2 Combined seat and back static-load test highest position most adverse position highest position rearmost position mid range least likely to c
46、ause overturning 7.2.3 Arm-rest downward static-load test central lowest position horizontal most likely to cause failure 7.2.4 Arm-rest downward static-load test front lowest position horizontal highest, foremost position 7.2.5 Arm-rest sideways static-load test lowest position horizontal highest,
47、widest position 7.2.6 Foot-rest static-load test least likely to cause overturning highest position 7.3.1 Seat and back durability highest position horizontal and foremost highest position most likely to cause failure mid range 90 to the base arm 7.3.2 Arm-rest durability lowest position horizontal
48、maximum tension highest, widest position 7.3.3 Swivel test highest position horizontal, foremost position highest position rearmost position 7.3.4 Foot-rest durability least likely to cause overturning lowest position 7.3.5 Castor and chair-base durability lowest position horizontal ISO 21015:2007(E
49、) ISO 2007 All rights reserved 5 5 Test apparatus 5.1 Test surface The test surface shall be rigid, horizontal and flat. 5.2 Stops Stops are devices to prevent the chair from sliding or rolling but not overturning, They shall be 3 mm high for stability tests and 12 mm high for all other tests, except in cases where the design of the chair or the test method necessitates the use of higher st
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