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1、BRITISH STANDARD BS 3415:1986 Specification for Venetian blinds UDC 645.315 + 692.833 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3415:1986 This British Standard, having been prepared under the direction of the Furniture and Household
2、 Equipment Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 April 1986 BSI 08-1999 First published September 1961 First revision April 1986 The following BSI references relate to the work on this standard: Committee reference FHM/18 Draft for com
3、ment 84/42828 DC ISBN 0 580 15050 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Furniture and Household Equipment Standards Committee (FHM/-) to Technical Committee FHM/18 upon which the following bodies were represented: British Bli
4、nd and Shutter Association Consumer Standards Advisory Committee of BSI Cordage Manufacturers Institute Crown Suppliers Design Council LAMSAC Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006, Uncontrolled
5、 Copy, (c) BSI BS 3415:1986 BSI 08-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Materials and construction1 4Performance4 5Marking and instructions5 Appendix A Raising and lowering test6 Appendix B Tilting test6 Appendix C Slat strength and flexibili
6、ty test6 Appendix D Crash lock test7 Figure 1 Typical venetian blind3 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3415:1986 ii BSI 08-1999 Foreword This revision of BS 3415 has been prepared u
7、nder the direction of the Furniture and Household Equipment Standards Committee at the request of manufacturers and purchasing organizations. It supersedes BS 3415:1961 which is withdrawn. This edition, like that published in 1961, is concerned only with blinds for use under normal atmospheric condi
8、tions. This revision contains more stringent requirements for the safety, strength and general performance of venetian blinds than the 1961 edition and all dimensions are now given in metric units in the standard. However, since window blinds are normally sold to domestic households as “made to meas
9、ure” items, manufacturers quoted dimensions may be given in imperial units to accord with the general understanding of the adult population. The tests applied to a blind simulate, as nearly as possible, the general performance necessary for it to give satisfactory service under normal conditions of
10、use. For blinds differing significantly from the dimensions of the test blind it is recommended that specific testing for mechanical performance be carried out on a representative blind of approximately the same size as that under consideration. A British Standard does not purport to include all the
11、 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii,
12、pages 1 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006,
13、Uncontrolled Copy, (c) BSI BS 3415:1986 BSI 08-19991 1 Scope This British Standard specifies requirements for the materials, construction, performance, marking and instructions for the installation and use of venetian blinds with flexible horizontal slats, adjustable to various angles, and having th
14、e raising, lowering, and tilting operations controlled by cords, tapes or rods, either separately or combined into one action. The tests in this standard are type tests. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions NOTETerms used
15、to describe the basic component parts of venetian blinds covered by this British Standard are given in, and illustrated by, Figure 1. For the purposes of this British Standard the following definitions apply. 2.1 overall width the full width of the head rail, including end-caps and/or fixing bracket
16、s 2.2 overall drop the distance from the top of the headrail fixing brackets to the lowest point of the bottom rail of a fully extended blind with the slats in the fully closed position 2.3 nominal drop the distance from the top of the headrail fixing brackets to the lowest point of the bottom rail
17、of a fully extended blind with the slats in the horizontal, fully open, position 2.4 control action any of the means by which slats are tilted from the horizontal to the vertical plane and by which a blind is moved between raised and lowered positions 2.5 combined control a feature of the operation
18、of a venetian blind whereby the control actions are performed using a single operating device 2.6 separate control a feature of the operation of a venetian blind whereby the control actions are performed by separate operating devices 2.7 ladder tape webbing or braid, attached to the mechanism within
19、 the headrail, providing support for individual slats of a venetian blind on fine cross ladders: when the tilt control is operated, one vertical element of the ladder tape rises and one falls causing the slats to move between the open and closed positions 3 Materials and construction 3.1 General. Th
20、e materials used to manufacture a venetian blind shall be free from visible defects which will appear on the outside surfaces of the assembled blind, e.g. dents, scratches, etc. NOTEBlemishes which do not mar the overall appearance of the finished blind are permissible. All materials visible in a mo
21、unted blind, in their finished condition, shall withstand, without detriment to their appearance, the corrosion test described in Appendix K of BS 1224:1970 at 24 h duration and shall have a fastness to light not less than standard 6 when tested in accordance with section B02 of BS 1006:1978 using t
22、he xenon arc fading test. 3.2 Headrail. The headrail shall be of material of sufficient strength and thickness to support the completed blind when mounted in accordance with the manufacturers instructions (see 5.2), without visible sagging or twisting. Unless specifically intended for installation w
23、ithin a recess or box, the ends of the headrail shall be closed off by end caps or end fixing brackets. The headrail shall not deviate from the horizontal by more than 5 mm when the blind is mounted in accordance with the manufacturers instructions beneath a plane surface, and no part of the operati
24、ng mechanism, within the headrail, shall make contact with that surface. All fittings within the headrail shall be secured such that components shall not become dislodged under the conditions of use of the blind specified in 4.2 and 4.3. NOTEFittings may be protected by a dust cover where an open si
25、de of the headrail is not intended to butt closely to a fixing area. Any such cover should provide maximum dust exclusion consistent with the free movement of operating mechanisms and should be secured to the headrail. 3.3 Fixing brackets. Blinds shall be supplied with fixing brackets able to suppor
26、t the blind and retain it securely under the conditions of use specified in 4.2 and 4.3. It shall be possible to remove the headrail from the brackets when they are fixed. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3415:1986 2 BSI 08
27、-1999 Brackets shall be pre-bored to allow for end or top or face fixing. Brackets designed to act as end caps by the closing-off of the open ends of the headrail channel shall be provided with a means of securing the headrail into the end-brackets. 3.4 Slats. The material and profile of any slat in
28、 the assembled blind shall be such as to provide the strength and flexibility specified in 4.5. Slat widths within a blind shall be consistent to within + 0.2 mm or 0.5 mm. Slats shall have radiused ends or corners and shall be free from burrs and sharp edges. Holes and slots cut into each slat shal
29、l be positioned symmetrically across the width of the slat and their width shall not exceed the width of the cord passing through them by more than 3 mm to minimize light penetration of the finished blind, consistent with satisfactory operation. The holes and slots in slats of the same blind shall a
30、lign to within 1 mm to minimize abrasion of cords and tapes passing through them. In a finished, assembled blind the slats shall be capable of tilting through an angle of not less than 70 to the horizontal in each direction and each slat shall overlap the adjoining slat by at least 10 % of the slat
31、width in each of the fully closed positions at any point of drop of the blind. The top slat shall be within 5 mm of the headrail in the fully closed position. Unless specifically designed to clear an obstruction at the point of installation, the length of any slat shall be within + 3 mm to 6 mm of t
32、he overall width of the blind, and the alignment of slat ends at any position of the blind, shall not deviate from vertical by more than 3 mm. 3.5 Bottom rail. The bottom rail shall be constructed from material rigid throughout its length in the mounted blind. The ends of the bottom rail shall be en
33、closed with end-caps. Unless specifically designed to clear an obstruction at the point of installation, the length of the bottom rail including end-caps shall be within + 3 mm to 6 mm of the overall width of the blind. Tape or cord securing points shall be in alignment to within 3 mm with the holes
34、 for these in the slats. Tape or cord anchorage shall withstand a force of 400 N applied directly to the tape or cord. 3.6 Control action 3.6.1 Combined control. The internal gear unit for combined control shall be of a ratio requiring a pulling force not exceeding 50 N to raise the blind; it shall
35、give complete control of raise, lower and tilt to any required position. Raising and lowering of combined control action blinds shall be by rod, tape or cord, with a breaking force of not less than 400 N, when tested in accordance with the method given in section 3 of BS 5053:1985; cord or tape shal
36、l form a closed loop. NOTE 1Ball-chain is considered to be a form of cord. The control actuating unit shall ensure that the action of the control rod, tape or cord is positive and that the control is held securely. NOTE 2A self-locking action or automatic overload device should be incorporated to pr
37、event overloading at the maximum positions of raise, lower or tilt. When raised, lowered and tilted to any position, the blind shall remain in the required position with all slats and the bottom rail horizontal and parallel to within 6 mm. 3.6.2 Separate control 3.6.2.1 Rise and fall control. The ri
38、se and fall control mechanism shall ensure quick release and a smooth raising and lowering action at any position, with no fluctuation greater than 10 % in the gradation of the forces required to raise or lower the blind completely. A locking cord control mechanism shall release by drawing the contr
39、ol cord across the face of the blind and shall lock when the cord is in a vertical position. It shall not be possible to drop a blind incorporating a cord locking system accidentally (see 4.6). Lift cords shall have a breaking force of not less than 400 N when tested in accordance with the method gi
40、ven in section 3 of BS 5053:1985. Cords shall be secured together so as to prevent horizontal misalignment of the blind by pulling the individual rise and fall, cords. 3.6.2.2 Tilt control. The tilt control shall be able to hold the suspended slats securely in any tilted position. Control cords or r
41、ods shall have a breaking force of not less than 400 N when tested in accordance with the method given in section 3 of BS 5053:1985 and cords shall be a closed loop or shall terminate in acorns. 3.7 Ladder tapes. Ladder tapes shall be constructed from polyester fibre. NOTE 1Fibres of equivalent or b
42、etter resistance to rotting and solar degradation than polyester may also be suitable. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3415:1986 BSI 08-19993 NOTEThis figure is intended to be illustrative of a typical venetian blind and i
43、ts component parts but does not otherwise form a part of the standard. Figure 1 Typical venetian blind (separate control actions using cords) Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:53:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3415:1986 4 BSI 08-1999 For the vertical section
44、s or supports, the tape shall have a breaking strength of not less than 250 N when tested in accordance with the method given in section 3 of BS 5053:1985 and, for the horizontal sections or cross-web, the tape shall have a breaking strength of not less than 50 N when tested in accordance with the m
45、ethod given in section 3 of BS 5053:1985. The cross-web shall be securely joined to the vertical supports and shall withstand a force of not less than 50 N without separation. The interval between tapes in a finished blind shall be such that the horizontal deflection of the slats between ladders doe
46、s not exceed 3 mm. NOTE 2Tapes should be distributed symmetrically across the blind width. 4 Performance 4.1 General. The tests specified in 4.2 to 4.6 and described in the appendices shall be performed on a blind of overall width 1 800 100 mm and overall drop 1 200 100 mm. NOTEAdditionally, for bli
47、nds differing significantly from these dimensions, the tests specified in 4.2 to 4.6 should be carried out on a blind of approximately the same size as that under consideration. No lubrication, other than that which is normally applied during the manufacture of operating parts, shall be added to the
48、 parts prior to or during the tests. For the duration of the tests, the blind shall be mounted according to the manufacturers instructions. 4.2 Raising and lowering. When tested in accordance with Appendix A, the blind shall undergo 3 000 complete cycles of raising, locking in the raised position (i
49、f appropriate), releasing and lowering without any visible sign of failure of any part of the blind, including the tape and hardware, failure of any lock and/or cord to hold the blind at any height, excessive wear of any of the parts (including cords, pulleys and grommets), or apparent increase in noise from mechanical parts either during or at the end of the test. Following the test, the forces required for any operation of the blind shall not have increased by more than 15 % and the breaking strength of any cord, tape or rod shall not have decreased
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