BS ISO 10262:1998 download free.Earth-moving machinery Hydraulic excavators Laboratory tests and performance requirements for operator protective guards.
1 Scope
BS ISO 10262 establishes a consistent repeatable test procedure end pertormance reqwrenients (or evaluating operator-protective guarding that undergo loading. Such guards are Lsually intended to provide excavator operators with reasonable protection against obØcts (e.g. rocks and debits) which would otherwise penetrate the operators station from the front or top.
Ills applicable to hydraulic excavators, as defined In ISO 7135 when equipped with an operators station guard(s).
2 NormatIve references
The lollowing standards contain provisions wIth, thro4i reference In this text consttute provisions of BS ISO 10262. Al the time of publication, the eStions Indicated were valid. Ali standards are subject to revision, and parlles to agreements based on BS ISO 10262 are encouraged to Investigate the possibility of applying the most recent eauons of the standards Indicated below. Members of IEC and ISO maintain registers ol currently valid International Standards.
ISO 146:1983, Sisal — Charpy impact test (V-notch).
ISO 898-1:—i), Mecharxcat properties of fasteners made of casbon steel and alloy steel — Part 1: Bolts. screws and studa
ISO 898-2:1992. Mecharxc& properties of fasteners — Part 2: Nuts with specitied proof load values — Coarse thread.
1S03164:1995, Earth-moving machinery — Laboratory evaluations of protective structures — Specifications tar deftection4wnUseç volume.
1S05353:1995. Earth-moving machInery, arid tractors and machinery for agriculture end forestry— Seat Index
-nt.
ISO 7135:2I, Earth-moving niachaiery — Hydmutic excavators — Terminology and commercial speciWcazlons.
3 DefInitions
For the purposes of BS ISO 10262, the following definitions and abbreviations apply.
3.1
operator guards
system of a top guard (3.3) and a front guard (3.2) lot the operator station of excavators
3.2
front guard
device intended to provide object protection to the front of the operator station of excavators
3.3
top guard
device intended to provide fatling object protection to the top of the operator station of excavators
3.4
deflectIon-limIting volume
DLV
that volisne. related to the operator, which serves to set tanks and deflection5 permisatle when performing laboratory evaluations of ROPS3 and FOPS
NOTE — The volisne. an EpmxmIabon, Is based on the seated climenwons of a large mile operator Adapted from
ISO 31841995
3.5
drop test object
object meeting the critefla outlined br either Level I or Level II acceptance used in structural loading testing
4 General
4.1 The operator station shall be equçiped accordingly with respect to the use of the machine and against risk of
falling anci’or approaching oects, with one of the following arrangements:
— a top guard providing protectiOn from falling objects;
— a front guard providing protection from objects that approach from the front:
— a cocTit nation at top and front guarding
42 The areas protected include:
— an area wItch shall be not less than the horizontal propction of the DLV for front guards providing protection from objects approaching the front of the operators station;
— an area which shall be not less than the vertical projection of the DLV for top guards providing protection from objects laltaig on the upper area of the operators station.
4.3 ResIstance 10 penetration of the guard to the point of Infringement of the DLV Is evaluated. The performance requirements of a representative specimen (i.e. within the manufacturers specifications) are based on the performance of a proven structure under laboratory evaluation procedures.
4.4 Two acceptance levels are defined as follows:
a) Level I acceptance Is intended for protection from small objects, e.g. sinai rocks, sinai debris and other sinai objects encountered In operations such as hl’iway maintenance, landscaping and other construction site services:
b) Level II acceptance is Intended for protection from large ofjects, e.g. large rocks, large debris and other large objects encountered in applications such as construction and demolition,
Compact excavators having a mass of 6 000 kg or less are excluded from acceptance Level II,
5.1.3 Apparatus, providing the following:
a means of raising the standard object to the required height
a means of releasing the standard object so that it drops without restramt
— a surface that cannot be penetrated by the machine or test bed when undergoing loading during the drop test:
— a means of determining whether the operator guard(s) penetrates the deflechon4lmlllng vokinw dunng the drop test iacfl may be either
— a DLV, placed upright, made of a matenal which indicates any penetration by the operator guard(s). Grease may be put on either the lower surface of the cover or the lop of the DLV to Indicate such penetration; or
— a dynamic instrumentation system of sufficient frequency response to indicate the relevant deflection with respect to the DLV
5.2 Apparatus for testing the front guard
5.2.1 Standard laboratory penetration test object, made of steel, with the shspe of the tapered end of the obqect in figure 1. The object length shall be sufficient to avoid a diameter larger than 260 mm making contact with the front guard diirWig test
5.2.2 Apparatui, providing the following:
— a means of pushing the object into the front guard:
— a means of measuring the torce exerted to push the object into the front guard;
— ameanso(determininglhetestobjectorftontguardpenetrabonoftheDLV.duringthepushtestmismaybe a DLV, placed upright, made of a material which indicates any penetration by the operator guard(s). Grease or sinar substance put either on the front of the DLV or on the inner surface of the front guard to indicate penetration. ED The DLV shall be positioned at the SlP in accordance with ISO 5353 and ISO 3164 and be fixed firmly to the same part of the machine to which the operator seat is secured: <iI
— a means of simultaneously measuring the deflection distance and the lorce used to push the object into the front guard.
5.3 Optional dynamic test
5.3.1 The front guard may be subrnlfled to an optional dynamic test using a device (see figure 1) that results in equivalent energy absorbed by the guard.
5.3.2 The operstor station base shall be provided with the same relative base firmness as that of the normal machine arrangement so as to restrict unnatural energy absorption by the operator station during the optional dynamic test. Furthermore, the test surface under the operator station shall be of such firmness that it is not penetrated by the arrangement when loaded.
6 Test conditions
6.1 Measurement accuracy
The measurement ancurecy of the deflection of the guard shall be ±5% of the maximum deflection measured.