1、BRITISH STANDARD BS 6912-19: 1996 ISO11112: 1995 Safety of earth-moving machinery Part 19: Specification for dimensions and requirements for operators seat ICS 53.100BS6912-19:1996 This British Standard, having been prepared under the directionof the Building and CivilEngineering Sector Board, waspu
2、blished under the authorityof the Standards Boardand comes into effect on 15 May 1996 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference B/513/1 Draft for comment 94/102309 DC ISBN 0 580 25619 7 Committees responsible for this British Standard The prepa
3、ration of this British Standard was entrusted by Technical Committee B/513, Construction equipment and plant, and site safety, to Subcommittee B/513/1, Earth-moving machinery, upon which the following bodies were represented: British Coal Corporation Construction Plant (Hire Association) Federation
4、of Civil Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Civil Engineers Silsoe Research Institute Amendments issued since publication Amd. No. Date CommentsBS6912-19:1996 BSI 08-1999 i Contents Page Committees respo
5、nsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Seat requirements 1 Figure 1 2 Table 1 3 List of references Inside back coverBS6912-19:1996 ii BSI 08-1999 National foreword This Part of BS 6912 has been prepared by Subcommittee B/513/1. It is identical with ISO 11
6、112:1995 Earth-moving machinery Operators seat Dimensions and requirements published by the International Organization for Standardization (ISO). ISO 11112 was prepared by Subcommittee 2, Safety requirements and human factors, of ISO Technical Committee 127, Earth-moving machinery, with the active p
7、articipation and approval of the UK. A British Standard does not purport to include all the 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. Cros
8、s-references Publication referred to Corresponding British Standard ISO 3411:1982 a BS 5538:1983 Specification for minimum operator space envelope for earth-moving machinery (Identical) ISO 5353:1978 b BS 5631:1978 Specification for earth moving machinery and tractors for agriculture and forestry Se
9、at index point (Identical) ISO 6165:1987 BS 6914 Terminology (including definitions of dimensions and symbols) for earth-moving machinery Part 1:1988 Glossary of terms for basic types of earth-moving machinery (Identical) a Revision in preparation. It is envisaged that upon publication of the revise
10、d International Standard it will be implemented as a British Standard. b It is envisaged that ISO 5353:1995 will be implemented as a British Standard in due course. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 4, an inside back cover and a
11、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.BS 6912-19:1996 BSI 08-1999 1 1 Scope This International Standard specifies the dimensions, requirements and adjustment ra
12、nges for operator seats on earth-moving machinery as defined in ISO 6165. Additionally, it provides dimensions for armrests when fitted on these machines. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this Internatio
13、nal Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Memb
14、ers of IEC and ISO maintain registers of currently valid International Standards. ISO 3411:, Earth-moving machinery Human physical dimensions of operators and minimum operator space envelope 1) . ISO 5353:1995, Earth-moving machinery, and tractors and machinery for agriculture and forestry Seat inde
15、x point. ISO 6165:1987, Earth-moving machinery Basic types Vocabulary. 3 Seat requirements 3.1 Nominal values of dimensions regarding seat features, their mutual locations and adjustments are established on the basis of ergonomic requirements taking into consideration operator sizes, according to IS
16、O 3411, from the 5th percentile through the 95th percentile. 3.2 The dimensions for the operators seat and related adjustments are given in Table 1 and Figure 1. These include essential dimensions and optional requirements. Seat dimensions and adjustments, if provided, are referenced to the seat ind
17、ex point (SIP) determined in accordance with ISO 5353. Dimensions and adjustments other than those specified in this International Standard may be used only if they provide better accommodation for the operator. 3.3 On those machines where a higher SIP is desirable, a reduced seat-back to seat cushi
18、on angle should be considered. See ISO 5353. 3.4 To ensure unimpeded ingress and egress of the operator at the seat, one or both of the armrests shall, where necessary, be movable. In such circumstances the armrest shall provide a firm support during operation of the machine. 3.5 Operator seats may
19、be provided with a swivel or tilt. It may pivot to improve both the operator work position and the means of ingress and egress. A means of securing the work positions of the seat (swivel or tilt) shall be provided to prevent inadvertent seat movement during operation of the machine. 1) To be publish
20、ed. (Revision of ISO 3411:1982)BS6912-19:1996 2 BSI 08-1999 1)See ISO 5353. Figure 1 BS 6912-19:1996 BSI 08-1999 3 Table 1 Dimensions in millimetres Figure reference Description Dimension a min. nom. max. l 1 b 1 l 2 h 1 h 2 b 2 b 3 h 3 l 3 b 4 b 5 h 4 h 5 r seat cushion, bottom length seat cushion,
21、 bottom width fore and aft adjustment b vertical adjustment b seat cushion, back height c seat cushion, back width: upper d seat cushion, back width: lower d armrest height ef armrest length f width between armrests f armrest width f armrest depth f height of lumbar centreline from SIP lumbar radius
22、 g 215 430 100 0 150 300 300 95 90 450 50 50 115 150 265 500 150 75 400 140 140 500 75 100 130 300 315 500 500 160 190 550 145 1 2 3 4 seat cushion, bottom angle h seat cushion, bottom angle adjustment i seat cushion, back angle j seat cushion, back angle adjustment b 5 0 5 0 10 5 10 5 15 15 a The m
23、aximum and minimum values may be changed for better accommodation of the operator based on ergonomic justification. The nominal values are values of broad or general acceptance; they are not average or median values. b Adjustment values are total adjustments. Vertical adjustment shall be independent
24、 of the adjustment of the suspension. c Where free swing of shoulders and arms over the top of the back is necessary or appropriate for visibility when reversing or when controlling rear-mounted implements, the maximum seat-back height should be 300 mm. d Where free aft swing of the elbows is desire
25、d, the maximum width should be 330 mm. The seat may have a seat back with a greater or lower width. e Armrests attached to the seat should move with the vertical and horizontal seat adjustments. The ability to adjust the armrests vertical to the max./min. values of h 3 is desirable h 3is measured ve
26、rtically from the SIP to the top of the armrest. f Reference value. g Radius of curvature of the lumbar support in the vertical plane should be nominally 300 mm with a minimum of 150 mm. h Angle of the top of the seat base of the SIP device after being positioned and weighted using the SIP measuring
27、 device and procedures given in ISO 5353. i Angle adjustment, if provided, is based from the mid-position. This is not necessarily a latched position. j Measure the angle of the centreline of the seat-back. If a lumbar support is provided, it should be set at the mid-range position, and the back ang
28、le measured on the centreline of the seat-back above the lumbar support. For seat-backs with lumbar support, the allowable angles may be increased by 5 or more.4 blankBS 6912-19:1996 BSI 08-1999 List of references See national foreword.BS 6912-19: 1996 ISO 11112: 1995 BSI 389 Chiswick High Road Lond
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