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1、BRITISH STANDARD BS 5104:1990 Specification for Adjustable height walking frames UDC 616 089.226 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5104:1990 This British Standard, having been prepared under the direction of the Health Care
2、Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1990 BSI 11-1999 First published July 1974 Second edition The following BSI references relate to the work on this standard: Committee reference HCC/38 Draft for comment 89/53821 DC
3、ISBN 0 580 18420 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Health Care Standards Policy Committee (HCC/-) to Technical Committee HCC/38, upon which the following bodies were represented: Association of National Health Service Sup
4、plies Officers British Investment Casting Trade Association British Medical Association British Surgical Trades Association Chartered Society of Physiotherapy College of Occupational Therapists Consumer Policy Committee of BSI Department of Health Disabled Living Foundation Disablement Services Auth
5、ority Royal Association for Disability and Rehabilitation Royal College of Nursing and National Council for Nurses of the United Kingdom Coopted members Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, U
6、ncontrolled Copy, (c) BSI BS 5104:1990 BSI 11-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definition1 3Construction1 4Dimensions1 5Handles1 6Adjustment locking arrangement1 7Bolted and/or screwed connections2 8Foot rubbers4 9Mass4 10Finish4 11Performance requirem
7、ents5 12Marking5 Appendix A Methods of test6 Figure 1 Adjustable height walking frames2 Figure 2 Height adjustment requirement (front at maximum extension)3 Figure 3 Height adjustment requirement (rear at maximum extension)3 Table 1 Dimensions4 Publications referred toInside back cover Licensed Copy
8、: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5104:1990 ii BSI 11-1999 Foreword This British Standard has been prepared under the direction of the Health Care Standards Policy Committee and supersedes BS 5104:1974, which is withdrawn. BS 5104 was fi
9、rst published in 1974 and gave requirements for three sizes of adjustable height walking frames based on tests carried out on various types of walking frame that have been found to be satisfactory in use. It was amended in 1985 by the publication of AMD 4709, which increased the maximum height to wh
10、ich the frames could be adjusted, and made also, together with the second amendment AMD 5379 in 1987, a number of minor changes. This edition of BS 5104 incorporates the published amendments and introduces technical changes to bring the standard up-to-date but it does not reflect a full review of th
11、e standard, which will be undertaken in due course. This edition introduces a wider range of surface finishes for aluminium walking frames and components, a greater range of height adjustment and a requirement that the walking frame be marked with the batch number. The requirement for leg extensions
12、 to be captive has been deleted so as to facilitate changing the extensions. Attention is drawn to the Manufacturers Registration Scheme administered by the Department of Health. Product certification. Users of this British Standard are advised to consider the desirability of third party certificati
13、on of product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS 5750. Enquiries as to the availability of third party certification schemes will be forwarded by BS
14、I to the Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of
15、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, pages 1 to 6, an inside back cover and a back
16、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, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5104:1990 BSI 11
17、-19991 1 Scope This British Standard specifies general requirements and performance tests for adjustable height walking frames without wheels or castors. Three sizes are specified namely, large, medium and small. The difficulty of obtaining satisfactory stability under conditions of maladjustment co
18、nsistent with safety and keeping the base dimensions of the frame within acceptable limits has precluded the inclusion of a very large size of adjustable frame. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definition For the purposes of this
19、British Standard the following definition applies. handle that part of the frame which is normally held in the hand when the frame is in use 3 Construction 3.1 General 3.1.1 Frames shall conform generally to the design illustrated in Figure 1. 3.1.2 The frame, excluding the leg extensions, shall con
20、sist of a rigid tubular structure having welded, bolted or brazed connections. 3.1.3 The design of the frame shall be such that the space between the front left and right legs is unimpeded, and with all four legs at their minimum length and without foot rubbers, any horizontal cross brace (see Figur
21、e 1) shall be as given in Table 1 (see dimension F). 3.1.4 The design of the frame shall be such that the following conditions are met. a) The four legs shall be adjustable for length. b) The centre of any hole provided for height adjustment shall be not less than 35 mm from the base end of the leg
22、member. c) With both rear legs at their minimum length and both front legs at their maximum length, the angle between the plane containing the rear legs and the base on which the frame stands shall be not more than 87 as shown in Figure 2. d) With both rear legs at their maximum length and both fron
23、t legs at their minimum length, the angle between the plane containing the front legs and the base on which the frame stands shall be not more than 87 as shown in Figure 3. NOTEThe design of the frames should be such that they may be stacked horizontally within each other without distortion. 3.2 Leg
24、 extensions 3.2.1 The leg extensions shall be an easy sliding fit. 3.2.2 At maximum adjustment the leg extensions and their respective legs shall engage by not less than 75 mm. 3.2.3 The centre of any hole provided for adjustment shall be not less than 35 mm from the nearest end of the leg extension
25、. 3.2.4 The holes for adjustment shall be jig drilled or precision punched to provide increments of adjustment as shown in Table 1. 3.2.5 With all four legs adjusted equally for length, the minimum and maximum heights obtainable measured from the base without foot rubbers to the centre of the major
26、axis of the handles shall be as shown in Table 1. 3.2.6 “Anti-rattle” collars shall be fitted which are also intended to provide damping friction between the leg and leg extension members. 3.3 Welding and brazing Where welding or brazing is used in the fabrication it shall be carried out in accordan
27、ce with BS 1723, BS 1724, BS 3019 or BS 5135 as appropriate. 4 Dimensions Dimensions of the frames shall be as given in Table 1. 5 Handles 5.1 Two handle shafts shall be provided with handles at the top of the frame, or the handles shall be mounted directly on the side top members. 5.2 If separate h
28、andle shafts are provided, they shall be firmly secured to, or integral with, the main structural members. 5.3 Handles shall have the length and, if cylindrical, the diameter given in Table 1 (see dimensions J and K). NOTE 1Handles may be of integral construction or may consist of a shaft fitted wit
29、h a separate handgrip. NOTE 2Handles may be cylindrical or contoured. 6 Adjustment locking arrangement 6.1 The device for locking the adjustments of the leg extensions shall consist of a steel “U” spring fitted at each end with a button of stainless steel or plated mild steel. 6.2 The design of the
30、button shall be such that adjustment may readily be made without the use of tools and the shape of the outer end of the button shall be hemispherical. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5104:1990 2 BSI 11-1999 7 Bolted and/or
31、 screwed connections 7.1 Where connections are made between tubular members shaped spacers of metal or durable non-brittle plastics materials shall be used to ensure distribution of load and to prevent distortion of the tubular members. NOTEWhere the end of a tubular member butts against the curved
32、surface of a second tubular member, the former may be suitably contoured to avoid the use of a shaped spacer. Figure 1 Adjustable height walking frames Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5104:1990 BSI 11-19993 Figure 2 Height
33、 adjustment requirement (front at maximum extension) Figure 3 Height adjustment requirement (rear at maximum extension) Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5104:1990 4 BSI 11-1999 Table 1 Dimensions 7.2 All threaded fastenings
34、 shall have a positive means of locking. 7.3 Threaded connections shall be such that there is no possibility of damage to clothing or discomfort to the user. 7.4 There shall be at least full thread engagement on all screwed fastenings. 7.5 Self-tapping screws shall not be used. 8 Foot rubbers 8.1 Th
35、e foot rubbers shall be pliable and have a hardness between 45 IRHD and 60 IRHD when tested in accordance with the method described in BS 903-A26. 8.2 The foot rubbers shall be an interference fit (tight-push) on the leg extensions. 8.3 The foot rubbers shall be moulded with a suitable tread not les
36、s than 2 mm deep and afford adequate grip. 8.4 The foot rubbers shall have a tread diameter of at least 10 mm greater than the internal diameter of the foot rubber. 8.5 An insert shall be incorporated into each foot rubber to prevent the end of the leg extension piercing the foot rubber. The thickne
37、ss of rubber, excluding the tread, below this insert shall be not less than 6 mm. 9 Mass The total mass of the frame, including the foot rubbers, shall not exceed that shown in Table 1. 10 Finish 10.1 General All parts of the frame shall be free from sharp edges or projections that could cause damag
38、e to clothing or discomfort to the user. 10.2 Frame 10.2.1 Stainless steel. Stainless steel shall be of bright-drawn, matt or polished finish. 10.2.2 Mild steel. Mild steel shall be one of the following: a) chromium plated in accordance with service condition no. 2 of BS 1224; or, b) stove enamelled
39、 in accordance with the process recommended by the manufacturer of the enamel; or, c) plastics coated to a standard of durability at least equal to the finishes specified in a) or b). 10.2.3 Aluminium alloy. Aluminium alloy shall have a surface coating. NOTEThe purpose of the coating is to prevent d
40、iscoloration of the skin and clothes of the user that might otherwise occur owing to the transfer of aluminium compounds from the component. Feature Reference in Figure 1 Size LargeMediumSmall mmmmmm Height from base (excluding foot rubbers) to major axis of handle, at the midway point of the handle
41、, with legs at maximum extensionA915 min.815 min.715 min. Height from base (excluding foot rubbers) to major axis of handle, at the midway point of the handle, with legs at minimum extensionB840 max.740 max.640 max. Increments of adjustment for heightC25 max.25 max.25 max. Maximum width at base, wit
42、h frame at maximum height (excluding foot rubbers)D650650650 Maximum depth at base, with frame at maximum height (excluding foot rubbers)E585585585 Height from base (excluding foot rubbers) to underside of any lower bracing member, with frame at minimum heightF150 to 165150 to 165150 to 165 Minimum
43、engagement of leg and leg extension, with frame at maximum heightH757575 Minimum length of handleJ100100100 Minimum diameter of handle if cylindricalK303030 kgkgkg Maximum mass including foot rubbers3.53.12.7 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:53:00 GMT+00:00 2006, Uncontrolle
44、d Copy, (c) BSI BS 5104:1990 BSI 11-19995 If the coating is an anodic oxidation coating, it shall be of thickness grade AA3 or greater, specified in accordance with BS 1615. 10.3 Fittings 10.3.1 All mild steel components shall be protectively plated to classification no. Zn3 or Cd3 of BS 1706 or to
45、BS 1224 service condition no. 2. 10.3.2 Aluminium alloy components shall have a surface coating. NOTEThe purpose of the coating is to prevent discoloration of the skin and clothes of the user that might otherwise occur owing to the transfer of aluminium compounds from the component. If the coating i
46、s an anodic oxidation coating, it shall be of thickness grade AA3 or greater, specified in accordance with BS 1615. 11 Performance requirements 11.1 Temperature/humidity cycling When tested by the method described in A.3 the frame shall not show evidence of serious deterioration. Particular attentio
47、n shall be paid to any hygroscopic materials. 11.2 Stability 11.2.1 When tested by the method described in A.4.1, the angle at which the frame becomes unstable shall be: a) not less than 25 with the line joining the base of the rear legs of the frame parallel to the axis of inclination; b) not less
48、than 30 with this line perpendicular to the axis of inclination. 11.2.2 When tested by the method described in A.4.2, the angle at which the frame becomes unstable shall be not less than 6. 11.2.3 When tested by the method described in A.4.3, the angle at which the frame becomes unstable shall be no
49、t less than 6. 11.3 Static loading When the frame is tested by the method described in A.5.2, the maximum deflection of any part when under load shall not exceed 12 mm. Any permanent set remaining after the load is removed shall not exceed 6 mm. At the completion of this test the height adjustment devices shall not have suffered damage to a degree which would render them unsafe or unable to operate correctly. When tested by the method described in A.7 none of the legs shall break, crack or show permanent deformation exceeding 15 mm when measured at the
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