1977L0541 — EN — 29.06.1987 — 005.001 — 1
This document is meant purely as a documentation tool and the institutions do not assume any liability for its contents
►B COUNCILDIRECTIVE
of28June1977
on the approximation of the laws of the Member States relating to safety belts and restraint
systemsofmotorvehicles
(77/541/EEC)
(OJ L 220, 29.8.1977, p. 95)
Amended by:
Official Journal
No page date
►M1Council Directive 81/576/EEC of 20 July 1981 L 209 32 29.7.1981
►M2CommissionDirective 82/319/EEC of 2 April 1982 L 139 17 19.5.1982
►M3Council Directive 87/354/EEC of 25 June 1987 L 192 43 11.7.1987
Amended by:
►A1Act of Accessionof Greece L 291 17 19.11.1979
►A2Act of Accessionof Spainan d Portugal L 302 23 15.11.1985
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COUNCILDIRECTIVE
of28June1977
on the approximationof the lawsofthe Member States relating to
safetybeltsandrestraint systemsofmotorvehicles
(77/541/EEC)
THE COUNCIL OF THE EUROPEAN COMMUNITIES,
Having regard to the Treaty establishing the European Economic
Community and in particular Article 100 thereof,
Having regard to the proposal from the Commission,Having regard to the opinion of the European Parliament(
1),
Having regard to the opinion of the Economic and Social
Committee(2),
Whereas the technical requirements which motor vehicles must satisfy
pursuant to national laws relate inter alia to seat belts and restraint
systems;
Whereas these requirements differ from one Member State to another;
whereas it is therefore necessary that all Member States adopt the samerequirements either in addition to or in place of their existing regula-tion s, inorder inparticular to allow the EEC type-approval procedurewhich was the subject of Council Directive 70/156/EEC of 6 February
1970 onthe approximationof the laws of the Member States relatin g to
the type-approval of motor vehicles and their trailers(
3) to be applied in
respect of each type of vehicle;
Whereas common requirements for the interior parts of the passenger
compartment, the layout of controls, the roof, the backrest and rear
part of the seats have beenlaid downby Directive 74/60/EEC(4);
whereas requirements for the internal fittings relating to the protectionof the driver against injury by the steering mechanism in the event ofanimpact have beenlaid downby Directive 74/297/EEC(
5); whereas
requirements relating to the strength of the seats and their anchorageshave beenlaid downby Directive 74/408/EEC(
6); whereas require-
ments relating to anchorages for safety belts have been laid down by
Directive 76/115/EEC(7); whereas other requirements relating to
internal fittings, and in particular those relating to head restraints andthe identification of the controls, will be laid down at a later date;
Whereas rules for seat belts and restraint systems include not only
design requirements but also their fitting in motor vehicles;
Whereas a harmonized component type-approval procedure for safety
belts and restraint systems makes it possible for each Member State tocheck compliance with the common design and testing requirements
and to inform the other Member States of its findings by sending a
copy of the component type-approval certificate completed for eachtype of safety belt or restraint system; whereas the placing of an EECcomponent type-approval mark on all safety belts and restraint systemsmanufactured in conformity with the approved type obviates any needfor technical checks on these safety belts and restraint systems in the
other Member States;
Whereas the main purpose of the harmonized requirements is to
promote road safety; whereas it should therefore be made compulsoryto fit safety belts and restraint systems to vehicles covered by thisDirective;1977L0541 — EN — 29.06.1987 — 005.001 — 2
(1) OJ No C 76, 7. 4. 1975, p. 37.
(2) OJ No C 263, 17. 11. 1975, p. 37.
(3) OJ No L 42, 23. 2. 1970, p. 1.
(4) OJ No L 38, 11. 2. 1974, p. 2.
(5) OJ No L 165, 20. 6. 1974, p. 16.
(6) OJ No L 221, 12. 8. 1974, p. 1.
(7) OJ No L 24, 30. 1. 1976, p. 6.
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Whereas the approximation of national laws relating to motor vehicles
entails mutual recognition by the Member States of checks carried outby each of them onthe basis of the commonrequiremen ts,
HAS ADOPTED THIS DIRECTIVE:
Article 1
1. Each Member State shall grant EEC component type-approval for
any type of three-point or lap safety belt and any type of restraintsystem which satisfies the design and test requirements laid down in 2of Annex I and in Annexes IV to XIV.
2. The Member State which has granted EEC component type-
approval shall take the measures required to ensure that productionmodels conform to the approved type, if need be in cooperation withthe competent authorities in the other Member States.
3. For the purpose of implementing paragraph 2, it shall be suffi-
cient for a Member State to ensure that as a minimum the quality-control procedures laid down in 2.8.1 of Annex I are applied.
If, however, the checks are made by the Member State itself, or by
laboratories authorized by it, the methods used shall be such as to
give results at least as reliable as those that would be givenby theprocedures provided for inparagraph 1. The procedure laid downin2.8.2 of Annex I is, in particular, an appropriate method.
Article 2
Member States shall, for each type of safety belt or restraint system
which they approve pursuant to Article 1, issue to the manufacturer,or to his authorized representative, an EEC component type-approvalmark conforming to one of the models shown in Annex III.
Member States shall take all appropriate measures to prevent the use of
marks liable to create confusion between safety belts or restraintsystems which have been type-approved pursuant to Article 1 and otherdevices.
Article 3
1. No Member State may prohibit the placing on the market of
safety belts and restraint systems on grounds relating to their designor method of functioning if they bear the EEC component type-
approval mark.
2. Nevertheless, a Member State may prohibit the placing on the
market of safety belts and restraint systems bearing the EEC compo-nent type-approval mark which consistently fail to conform to the
approved type.
That State shall inform the other Member States and the Commission
forthwith of the measures taken, specifying the reasons for its decision.
Article 4
The competent authorities of each Member State shall within one
month send to those of the other Member States a copy of the compo-nent type-approval certificate, an example of which is given in AnnexII, completed for each type of safety belt and restraint system which
they approve or refuse to approve.
Article 5
1. If a Member State which has granted EEC component type-
approval finds that a number of safety belts and restraint systems
bearing the same EEC component type-approval mark do not conformto the type which it has approved, it shall take the necessary measuresto ensure that production models conform to the approved type. Thecompetent authorities of that State shall advise those of the otherMember States of the measures taken, which may, where there is1977L0541 — EN — 29.06.1987 — 005.001 — 3
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consistent failure to conform, extend to withdrawal of EEC component
type-approval. The said authorities shall take the same measures if theyare informed by the competent authorities of another Member State of
such failure to conform.
2. The competent authorities of the Member States shall inform one
another within one month of any withdrawal of EEC component type-approval and of the reasons for such measure.
3. If a Member State which has granted EEC component type-
approval disputes the failure to conform notified to it, the MemberStates concerned shall endeavour to settle the dispute. The Commission
shall be kept informed and shall, where necessary, hold appropriate
consultations for the purpose of reaching a settlement.
Article 6
Any decision taken pursuant to the provisions adopted in implementa-
tion of this Directive to refuse or withdraw EEC component type-approval for safety belts or restraint systems or prohibit their placingonthe market or use shall set out indetail the reason s onwhich it isbased. Such decisions shall be notified to the party concerned, who
shall at the same time be informed of the remedies available to him
un der the laws inforce inthe Member States an d of the time limitsallowed for the exercise of such remedies.
Article 7
No Member State may refuse to grant EEC type-approval or national
type-approval for a vehicle on grounds relating to the safety belts orrestraint systems with which it is equipped, if these bear the EECcomponent type-approval mark and are fitted in accordance with therequirements laid down in 3 of Annex I.
Article 8
No Member State may refuse or prohibit the sale, registration, entry
into service or use of any vehicle on grounds relating to its safety belts
or restraint systems, if these bear the EEC component type-approvalmark and are fitted in accordance with the requirements laid down in3 of Annex I.
Article 9
For the purposes of this Directive, ‘vehicle’ means any motor vehicle
in categories M and N as defined in Annex I to Directive 70/156/EECintended for use on the road, having at least four wheels and a
maximum designspeed exceedin g 25 km/h.
Article 10
The amendments necessary for adapting the Annexes to take account of
technical progress shall be adopted in accordance with the procedurelaid downinArticle 13 of Directive 70/156/EEC.
Article 11
1. Member States shall bring into force the provisions necessary in
order to comply with this Directive within 18 months of its notificationand shall forthwith inform the Commission thereof.
2. Member States shall ensure that the texts of the main provisions
of national law which they adopt in the field covered by this Directive
are communicated to the Commission.
Article 12
This Directive is addressed to the Member States.1977L0541 — EN — 29.06.1987 — 005.001 — 4
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ANNEX I
SCOPE, DEFINITIONS, EEC COMPONENT TYPE-APPROVAL,
INSTALLATIONREQUIREMENTS
0. SCOPE
This Directive applies to safety belts and restraint systems which
are designed for installation in vehicles conforming to the definition
given in Article 9 and are intended for separate use, i.e. as indivi-
dual fittings, by persons of adult build occupying forward-facing
seats.
1. DEFINITIONS
For the purposes of this Directive:
1.1. ‘safety belt (seat belt, belt)’ means an assembly of straps with a
securing buckle, adjusting devices and attachments which is capable
of being anchored to a power-driven vehicle and is designed to
diminish the risk of injury to its wearer, in the event of collision
or of abrupt vehicle deceleration, by limiting the mobility of the
wearer's body. Such anassembly is gen erally referred to as a ‘belt
assembly’, a term also embracing any device for energy absorption
or belt retraction;
1.1.1. ‘lap belt’ means a belt which passes across the front of the wearer's
pelvic region;
1.1.2. ‘diagonal belt’ means a belt which passes diagonally across the
front of the chest, from the hip to the opposite shoulder;
1.1.3. ‘three-point belt’ means a belt which is essentially a combination of
a lap strap and a diagonal strap;
1.1.4. ‘harness belt’ means a belt assembly comprising a lap belt and
shoulder straps;
1.2. ‘belt type’ means a category of belts which do not differ in such
essential respects as:
1.2.1. rigid parts (buckle, attachments, retractor, etc.),1.2.2. the material, weave, dimensions and colour of the straps,1.2.3. the geometry of the belt assembly;1.3. ‘strap’means a flexible component designed to hold the body and
to transmit stresses to the belt anchorages;
1.4. ‘buckle’ means a quick-release device enabling the wearer to be
held by the belt. The buckle may incorporate the belt adjusting
device;
1.5. ‘belt adjusting device’ means a device enabling the belt to be
adjusted according to the requirements of the individual wearer
and to the position of the seat. ►
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part of the buckle, the retractor or any other part of the safety
belt;◄
1.6. ‘attachments’ means parts of the belt assembly, including the neces-
sary securing components, which enable it to be attached to the belt
anchorages;
1.7. ‘energy absorber’ means a device designed to disperse energy inde-
pendently of, or jointly with, the strap and forming part of a belt
assembly;
1.8. ‘retractor’ means a device for accommodating a part or the whole
of the strap of a safety belt;
1.8.1. ‘non-locking retractor’ (type 1) means a retractor from which the
strap is extracted to its full length by a small external force and
which allows of no adjustment of the strap which has been
extracted;1977L0541 — EN — 29.06.1987 — 005.001 — 5
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1.8.2. ‘manually unlocking retractor’ (type 2) means a retractor requiring
the manual operation of a device by the user to unlock the retractor
inorder to obtainthe desired strap extractionan d which locks auto-
matically whenthe said operationceases;
1.8.3. ‘automatically locking retractor’ (type 3) means a retractor allowing
extraction of the strap to the desired length and which, when the
buckle is fastened, automatically adjusts the strap to the wearer.
Further extractionof the strap is n ot possible without deliberate
actiononthe part of the wearer;
1.8.4. ‘emergency locking retractor’ (type 4) means a retractor which, in
normal driving conditions, does not restrict the freedom of move-
ment of the wearer of the safety belt. It has a length adjusting
device which automatically adjusts the strap to the wearer, and a
locking mechanism actuated in an emergency by:
1.8.4.1. decelerationof the vehicle, extractionof the strap relative to the
retractor or any other automatic means (single sensitivity), or
1.8.4.2. any combination of these factors (multiple sensitivity);
1.8.5. ‘emergency-locking retractor with higher response threshold’ (type
4N) means a retractor of the type defined in Item 1.8.4, but having
special properties as regards use invehicles of categories M2,M3,
N1,N2and N3(1);
1.9. ‘belt anchorages’ means the parts of the vehicle structure or seat
structure or any other part of the vehicle to which the safety beltsare to be secured;
1.10. ‘vehicle type’ as regards safety belts and restraint systems means a
category of power-drivenvehicles which do n ot differ insuch
essential respects as the dimensions, lines and constituent materials
of the components of the vehicle structure or seat structure or any
other part of the vehicle to which the safety belts and the restraint
systems are attached;
1.11. ‘restraint system’ means a system combining a seat, fixed to the
structure of the vehicle by appropriate means, and a safety belt for
which at least one anchorage is located on the seat structure;
1.12. ‘seat’means a structure which may or may not be integral with the
vehicle structure complete with trim, intended to seat one adult
person. The term covers both an individual seat and part of a bench
seat intended to seat one person;
1.13. ‘group of seats’ means either a bench-type seat, or seats which are
separate but side-by-side (i.e., fixed so that the front seat anchorages
of one of these seats are in line with the front or rear anchorages of
the other or between the anchorages of the other seat) and seat one
or more adults;
1.14. ‘bench seat’ means a structure complete with trim, intended to seat
at least two adults;
1.15. ‘adjustment system’ means the device by which the seat or its parts
canbe adjusted to a positionsuited to the morphology of the seated
occupant. This device may, in particular, allow:
1.15.1. longitudinal displacement,
1.15.2. vertical displacement,
1.15.3. angular displacement;
1.16. ‘seat anchorage’ means the system by which the seat assembly is
secured to the vehicle structure, including the affected parts of the
vehicle structure;
1.17. ‘seat type’ means a category of seats which do not differ in such
essential respects as:
1.17.1. the structure, shape, dimensions and materials of the seat,
1.17.2. the type and dimensions of the adjustment systems and all locking
systems,1977L0541 — EN — 29.06.1987 — 005.001 — 6
(1) ‘Vehicle categories defined in Annex I to Directive 70/156/EEC (OJ No L 42, 23. 2.
1970).’▼M2
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1.17.3. the type and dimensions of the belt anchorages on the seat, of the
seat anchorage and of the affected parts of the vehicle structure;
1.18. ‘displacement system’ means a device enabling the seat or one of its
parts to be displaced angularly or longitudinally, without a fixed
intermediate position, to facilitate passenger access;
1.19. ‘locking system’ means a device ensuring that the seat and its parts
are maintained in any position of use;
1.20. ‘recessed buckle-release button’: it must not be possible to release
the buckle using a sphere having a diameter of 40 mm;
1.21. ‘non-recessed buckle-release button’: it must be possible to release
the buckle using a sphere having a diameter of 40 mm.
2. EEC COMPONENT TYPE-APPROVAL
2.1.ApplicationforEECcomponenttype-approval
2.1.1. The application for EEC component type-approval of a type of
safety belt shall be submitted by the holder of the trade name or
mark or by his representative.
The application for EEC component type-approval of a type of
restraint system shall be submitted by the holder of the trade mark
or by his representative or by the manufacturer of the vehicle in
which it is to be installed or by his representative.
2.1.2. It shall be accompanied by:
2.1.2.1. ►M2a technical description in triplicate of the belt type, providing
details of the straps and rigid parts used, together with appropriate
drawings and, in the case of retractors, instructions for installation
thereof and installation of the sensors. ◄The drawings must show
the position for the EEC component type-approval mark. The
descriptionshall men tionthe colour of the model submitted for
approval and shall specify the vehicle type(s) for which this belt
type is intended. In the case of a restraint system, the description
shall include: drawings, on an appropriate scale, of the vehicle
structure, seat structure, adjustment systems and attachments,
showing the positions of the seat anchorages and belt anchorages
and reinforcements in sufficient detail; a specification of the mate-
rials used which may affect the strength of the seat anchorages and
belt anchorages; a technical description of the seat anchorages and
the belt anchorages;
2.1.2.2. five samples of a belt type, and
2.1.2.3. a 10-m length of each type of strap used in the type of belt.2.1.2.4. The technical service conducting the component type-approval tests
shall be entitled to request further samples.
2.1.3. In the case of restraint systems, two samples, which may include
two of the samples of belts mentioned in 2.1.2.2, and, at the manu-
facturer's choice, either a vehicle representative of the vehicle type
to be approved, or the part or parts of the vehicle considered essen-
tial by the technical service conducting approval tests for testing the
restraint system, shall be submitted by the applicant to the service.
2.2.Markings
The samples of a belt type or type of restraint system submitted for
EEC component type-approval in accordance with 2.1 shall be
clearly and indelibly marked with the manufacturer's name, trade
name or mark.
2.3.General specifications
2.3.1. Each sample submitted in accordance with 2.1 shall conform to the
specifications set out in 2.3 to 2.7.
2.3.2. The belt or the restraint system shall be so designed and constructed
that, when correctly installed and properly used by an occupant, it
operates satisfactorily and reduces the risk of bodily injury in the
event of an accident.1977L0541 — EN — 29.06.1987 — 005.001 — 7
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2.4.Rigidparts
2.4.1. General
2.4.1.1. The rigid parts of the safety belt, such as buckles, adjusting devices,
attachments and the like, shall not have sharp edges liable to cause
wear or breakage of the straps by chafing.
2.4.1.2. All parts of a belt assembly liable to be affected by corrosionshall
be suitably protected against it. After undergoing the corrosion test
prescribed in 2.7.2, neither signs of deterioration likely to impair the
proper functioning of the device nor any significant corrosion shall
be visible to the unaided eye of a qualified observer.
2.4.1.3. Rigid parts intended to absorb energy or to be subjected to or to
transmit a load shall not be fragile.
2.4.1.4. The rigid items and ►M2parts made of plastics ◄of a safety belt
must be so located and installed that, when a power-driven vehicle
is in normal use, they cannot become trapped under a sliding seat or
in a door of the vehicle. If one of the parts does not meet the above
requirements, it must be subjected to the cold impact test specified
in 2.7.6.4. After test, if any visible cracks are present in the plastic
covers or retainers of rigid items, these ►M2parts made of plas-
tics◄shall be removed and the remaining assembly shall then be
checked for its continued security. If the remaining assembly is still
secure, or if no visible cracks are present, it shall be checked again
inorder to ascertainwhether it meets the requiremen ts of 2.4.2,
2.4.3 and 2.6.
2.4.2. Buckle
2.4.2.1. The buckle shall be so designed as to preclude any possibility of
incorrect use. This means inter alia that it must not be possible for
the buckle to be left ina partially-closed position . The procedure for
opening the buckle must be obvious. Wherever the buckle is likely
to be in contact with the wearer, the width of its contact surface
shall not be less than 46 mm.
2.4.2.2. The buckle, even when not under load, shall remain closed, what-
ever its position. It must not be possible to release it with a force
less than1 daN.
The buckle shall be so designed as to be easy to use and to grasp. It
shall be capable of being released when under the load specified in
2.7.9.2.
The buckle shall be released by pressing either a button or a similar
device.►M2The surface to which this pressure is applied must
have the following dimensions with the button in the release posi-
tion and when projected into a plane perpendicular to the button's
initial direction of motion: ◄
— for enclosed devices, an area of not less than 4·5 cm2and a
width of not less than 15 mm;
— for non-enclosed devices, an area of not less than 2·5 cm2and a
width of not less than 10 mm.
This area shall be coloured red. No other part of the buckle shall be
of this colour.
2.4.2.3. The buckle must be capable of withstanding repeated operation and,
before the dynamic test referred to in Item 2.7.8, must undergo
5 000 opening and closing cycles under normal conditions of use.
2.4.2.4. The buckle, whentested inaccordan ce with 2.7.6.3 shall operate
normally.
2.4.2.5. The force required to openthe buckle inthe test prescribed in2.7.9
shall not exceed 6 daN.
2.4.2.6. The buckle shall be tested for strength in accordance with the
requirements of 2.7.6.1 and 2.7.6.5, as appropriate. It must not
break, be seriously distorted or become detached whensubjected to
the prescribed load.
2.4.2.7. In the case of buckles which incorporate a component common to
two assemblies, if the buckle of one assembly can be assembled in
use with the mating part of that assembly and with that of the other
assembly, the strength and release tests mentioned in 2.7.8 and 2.7.9
shall be carried out for both possible means of assembly.1977L0541 — EN — 29.06.1987 — 005.001 — 8
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2.4.3. Belt adjusting device
2.4.3.1. Two samples of each belt adjusting device shall be tested in accor-
dance with the requirements of 2.7.4. The strap slip shall not exceed
25 mm for each sample of adjusting device and the sum of shifts for
all the adjusting devices of a belt shall not exceed 40 mm.
2.4.3.2. All adjusting devices shall be tested for strength in accordance with
2.7.6.1. They must neither break nor become detached when
subjected to the prescribed load.
2.4.3.3. Whena test is carried out inaccordan ce with 2.7.6.6, the force
required to operate any manual device shall not exceed 5 daN.
2.4.4. Attachments
Attachments shall be tested for strength in accordance with the
requirements of 2.7.6.1 and 2.7.6.2. They must neither break nor
become detached whensubjected to the prescribed load.
2.4.5. Retractors
Retractors shall fulfil the requirements specified below, including
the tests for strength prescribed in 2.7.6.1 and 2.7.6.2.
2.4.5.1. Automatically locking retractors
2.4.5.1.1. The strap of a safety belt equipped with anautomatically lockin g
retractor shall not move more than 30 mm between the locking
positions of the retractor. After a rearward movement by the wearer,
the belt must either remaininits in itial positionor returnto that
position automatically on subsequent forward movements by the
wearer.
2.4.5.1.2. If the retractor is part of a lap belt, the retracting force of the strap
shall be not less than 0·7 daN when measured in the free length
between the manikin and the retractor in accordance with 2.7.7.4.
If the retractor is part of a diagonal strap, the retracting force of
the strap shall be not less than 0·2 daN and not more than 0·7 daN
whensimilarly measured. If the strap passes through a guide or
pulley, the retracting force shall be measured in the free length
between the manikin and the guide or pulley. If the assembly incor-
porates a device which, upon manual or automatic operation,
prevents the strap from being completely retracted, such a device
shall not be operated when the retracting force is assessed.
2.4.5.1.3. The strap shall be withdrawnfrom the retractor an d allowed to
retract repreatedly, inaccordan ce with the method described in
2.7.7.1, until 5000 cycles of withdrawal and retraction have been
completed. The retractor shall thenbe subjected to the corrosion
test prescribed in2.7.2 followed by the dust resistan ce test described
in2.7.7.3. It shall thensatisfactorily complete a further 5 000 cycles
after which it shall still meet the requirements of 2.4.5.1.1 and
2.4.5.1.2. After the above tests, the retractor shall still function
correctly and stow the strap efficiently.
2.4.5.2. Emergency locking retractors
2.4.5.2.1. An emergency locking retractor shall satisfy the following condi-
tions when tested in accordance with 2.7.7.2:
2.4.5.2.1.1. it shall have locked whenthe vehicle decelerationreaches a value
of 0·45 g inthe case of type 4 or 0·85 g inthe case of type 4N
retractors;
2.4.5.2.1.2. it shall not lock at strap accelerations, measured in the direction of
unreeling, of less than 0·8 g in the case of type 4 or less than 1·0 g
inthe case of type 4N retractors;
2.4.5.2.1.3. in addition, it shall not lock when the sensor is inclined at an angle
not exceeding 12º in any direction from the installation position
specified by the manufacturer;
2.4.5.2.1.4. it shall lock when the sensor is inclined at an angle of not less than
27º inthe case of type 4 or n ot less than40º inthe case of type 4N
retractors in any direction from the installation position specified by
the manufacturer;
2.4.5.2.1.5. if operation of the retractor is dependent on an external signal or
energy source, the device shall ensure automatic locking of the
retractor in the event of the failure or interruption of the signal or
energy source.1977L0541 — EN — 29.06.1987 — 005.001 — 9
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2.4.5.2.2. when tested in accordance with Item 2.7.7.2, an emergency locking
retractor with multiple sensitivity, including strap-sensitivity, shall
comply with the specified requirements and also lock when strap
acceleration measured in the direction of unreeling is not less than
1·5 g inthe case of type 4 or n ot less than2·0 g inthe case of type
4N retractors;
2.4.5.2.3. in each of the tests mentioned in 2.4.5.2.1 and 2.4.5.2.2, the amount
of strap movement which may occur before the retractor locks shall
not exceed 50 mm, starting at the length specified in 2.7.7.2.1. In
order to comply with the requirements of 2.4.5.2.1.2, a retractor
shall be considered as satisfactory if, at the strap acceleration values
prescribed in that point, it does not lock until at least the first 50
mm of strap has been unwound, starting at the length specified in
2.7.7.2.1;
2.4.5.2.4. if the retractor is part of a lap belt, the retracting force of the strap
shall be not less than 0·7 daN when measured in the free length
between the manikin and the retractor, in accordance with 2.7.7.4.
If the retractor is part of a diagonal strap, the retracting force of
the strap shall be not less than 0·2 daN and not more than 0·7 daN
whensimilarly measured. If the strap passes through a guide or
pulley, the retracting force shall be measured in the free length
between the manikin and the guide or pulley. If the assembly incor-
porates a device which, upon manual or automatic operation,
prevents the strap from being completely retracted, such a device
shall not be operated when the retracting force is assessed;
2.4.5.2.5. the strap shall be withdrawnfrom the retractor an d allowed to
retract repeatedly inaccordan ce with the method described in
2.7.7.1 until 40000 cycles of withdrawal and retraction have been
completed. The retractor shall thenbe subjected to the corrosion
test prescribed in2.7.2 followed by the dust resistan ce test described
in2.7.7.3. It shall thensatisfactorily complete a further 5 000 cycles
of withdrawal and retraction, after which it shall still meet the
requirements of 2.4.5.2.1, 2.4.5.2.2, 2.4.5.2.3 and 2.4.5.2.4. After
the above tests, the retractor shall still function correctly and stow
the strap efficiently.
2.5.Straps
2.5.1. General
2.5.1.1. The characteristics of the straps shall be such as to ensure that their
pressure onthe wearer's body is distributed as even ly as possible
over their whole width and that they do not twist, even under load.
They shall have energy-absorbing and energy-dispersing capacities.
2.5.1.2. The width of the strap under a load of 980 daN shall not be less
than 46 mm. This dimension shall be measured during the
breaking-strength test prescribed in 2.7.5, and without stopping the
machine.
2.5.2. Strength after room-conditioning
In the case of the two strap samples conditioned in conformity with
2.7.3.1, the breaking load of the strap, determined in accordance
with 2.7.5, shall be not less than 1 470 daN. The difference between
the breaking loads of the two samples shall not exceed 10 % of the
greater of the breaking loads measured.
2.5.3. Strength after special conditioning
In the case of the two strap samples conditioned in conformity with
one of the provisions of 2.7.3 (except 2.7.3.1), the breaking load of
the strap shall be not less than 75 % of the average of the loads
determined in the test referred to in 2.5.2, and not less than 1470
daN. The technical service may dispense with one or more of these
tests if the compositionof the material used, or in formationalready
available, renders the test or tests superfluous.
2.6.Beltassemblyorrestraintsystem
2.6.1. Requirements for dynamic testing
2.6.1.1. The belt assembly or restraint system shall be subjected to a
dynamic test in conformity with 2.7.8.1977L0541 — EN — 29.06.1987 — 005.001 — 10
▼B
▼M2
2.6.1.2. The dynamic test shall be performed on two belt assemblies which
have not previously been under load, except in the case of belt
assemblies forming part of restraint systems, when the dynamic
test shall be performed on the restraint systems intended for one
group of seats which have not previously been under load. The
buckles of the belts to be tested shall satisfy the requirements set
out inItem 2.4.2.3:
2.6.1.2.1. the belts shall have undergone the corrosion test defined in Item
2.7.2, after which the buckles shall be subjected to a further 500
opening and closing cycles under normal conditions of use;
2.6.1.2.2. inthe case of safety belts with retractors, the latter shall have been
subjected to the tests described inItems 2.4.5.1 or 2.4.5.2. If,
however, a retractor has already beensubjected to the corrosion
test pursuant to the provisions of Item 2.6.1.2.1, this test need not
be repeated.
2.6.1.3. During this test, the following requirements shall be met:2.6.1.3.1. no part of a belt assembly or a restraint system securing the occu-
pant shall break and no buckle or locking or displacement system
shall unlock; and
2.6.1.3.2. the forward displacement of the manikin shall be between 80 and
200 mm at pelvic level inthe case of lap belts. Inthe case of other
types of belt, the forward displacement shall be between 80 and 200mm at pelvic level and between 100 and 300 mm at torso level.
These displacements are the displacements in relation to the
measurement points shown in Annex VIII, Figure 6.
►
M22.6.1.4.◄Inthe case of a restrain t system:
►M22.6.1.4.1. ◄the movement of the chest reference point may exceed that
specified in2.6.1.2.2 if it canbe shown , either by calculationor by
a further test, that no part of the torso or the head of the manikin
used in the dynamic test would have come into contact with any
forward rigid part of the vehicle, apart from contact of the chest
with the steering assembly, if the latter meets the requirements of
Directive 74/297/EEC and provided that contact does not occur at
a speed higher than24 km/h. For this assessmen t, the seat shall be
con sidered to be inthe positionspecified in2.7.8.1.5;
2.6.1.4.2. in vehicles where such devices are used, the displacement and
locking systems enabling the occupants of all seats to leave the
vehicle shall still be operable by hand after the dynamic test.
2.6.2. Strength after abrasion procedure
2.6.2.1. For both samples conditioned in conformity with 2.7.3.6, the
breaking load shall be assessed in accordance with 2.5.2 and 2.7.6.
It shall be at least equal to 75 % of the average of the breaking
loads determined during tests on unabraded straps, and not less
than the minimum load specified for the items being tested. The
difference between the breaking loads of the two samples shall not
exceed 20 % of the greater of the breaking loads measured.
►M2In the type 1 and type 2 procedures, the tensile-strength test
shall be conducted on the strap samples only (Item 2.7.5). In type 3
procedures, the tensile-strength test shall be conducted on the strap
and relevant rigid parts (Item 2.7.6). ◄
2.6.2.2. The items to be subjected to anabrasionprocedure an d the proce-
dures to be followed are indicated in the following table. A new
sample shall be used for each procedure.
Type 1
procedureType 2
procedureType 3
procedure
Attachment — — x
Guide or pulley — x —
Buckle-loop — x x
Adjusting device x ►M2—◄ x
Parts sewnto the strap — — x1977L0541 — EN — 29.06.1987 — 005.001 — 11
▼B
▼M2
▼B
▼B
2.7.Tests
2.7.1. Use of samples submitted for EEC component type-approval of a
type of belt or restraint system (see Annex XIV)
2.7.1.1. Two belts or restraint systems are required for the buckle inspec-
tion, the low-temperature buckle test, the low-temperature test
described inItem 2.7.6.4 where n ecessary, the buckle durability
test, the belt corrosion test, the retractor operating tests and the
buckle-opening test after the dynamic test. One of these two
samples shall be used for the inspection of the belt or restraint
system.
2.7.1.2. One belt or restraint system is required for the inspection of the
buckle and the strength tests on the buckle, the attachment mount-
ings, the belt adjusting devices and, where necessary, the retractors.
2.7.1.3. Two belts or restraint systems are required for the inspection of the
buckle, the micro-slip test and the abrasion test. The belt adjustment
device operating test shall be conducted on one of the two samples.
2.7.1.4. ►M2The sample of strap shall be used for testing the breaking
strength of the strap. Part of this sample shall be preserved for as
long as the component type-approval remains valid. ◄
2.7.2. Corrosion test
2.7.2.1. A complete safety belt assembly shall be positioned in a test
chamber as prescribed in Annex XIII. In the case of an assembly
incorporating a retractor, the strap shall be unwound to full length,
less 300 ± 3 mm.
Except for short interruptions that may be necessary, e.g. for
checking and replenishing the salt solution, the exposure test shall
proceed continuously for a period of fifty hours.
2.7.2.2. Oncompletionof the exposure test, the assembly shall be gen tly
washed or dipped in clean running water at a temperature not
exceeding 38 ºC so as to remove any salt deposit that may have
formed, and then allowed to dry at room temperature for 24 hours
before being inspected in accordance with 2.4.1.2.
2.7.3. Conditioning of straps for the breaking-strength test
Samples cut from the strap, as referred to in2.1.2.4, shall be con di-
tioned as follows.
2.7.3.1. Room-conditioning
The strap shall be kept for a minimum of 24 hours in an atmosphere
having a temperature of 20 ± 5 ºC and a relative humidity of 65 ±
5 %. If the test is not carried out immediately after conditioning, the
sample shall be placed ina hermetically sealed receptacle un til the
test begins. The breaking load shall be determined within five
minutes of the strap's removal from the conditioning atmosphere orreceptacle.
2.7.3.2. Light-conditioning2.7.3.2.1. ►
M2The provisions of recommendation ISO/R 105-B 02-1978
shall apply. ◄The strap shall be exposed to light for the time
necessary to produce fading of Standard Blue Dye No 7 to a
contrast equal to grade four on the grey scale.
2.7.3.2.2. The strap shall thenbe kept for a min imum of 24 hours at anair
temperature of 20 ± 5 ºC and a relative humidity of 65 ± 5 %. Ifthe test cannot be carried out immediately after the conditioning,
the sample shall be kept in an hermetically sealed container until
the start of the test. The tensile strength of the strap shall be deter-
mined within five minutes of its removal from the conditioning
atmosphere or receptacle.1977L0541 — EN — 29.06.1987 — 005.001 — 12
▼M2
▼B
▼M2
▼B
▼M2
▼B
2.7.3.3. Cold-conditioning
2.7.3.3.1. The strap shall be kept for a minimum of 24 hours in an atmosphere
having a temperature of 20 ± 5 ºC and a relative humidity of 65 ±
5% .
2.7.3.3.2. The strap shall thenbe kept for 1½ hours ona plan e surface ina
low-temperature chamber inwhich the air temperature is − 30 ± 5
ºC. It shall thenbe folded an d the fold shall be loaded with a mass
of 2 kg previously cooled to − 30 ± 5 ºC. Whenthe strap has been
kept under load for 30 minutes in the same low-temperature
chamber, the mass shall be removed and the breaking load shall be
measured withinfive min utes of the strap's removal from the low-
temperature chamber.
2.7.3.4. Heat-conditioning2.7.3.4.1. The strap shall be kept for three hours in a heating cabinet in an
atmosphere having a temperature of 60 ± 5 ºC and a relative
humidity of 65 ± 5 %.
2.7.3.4.2. The breaking load shall be determined within five minutes of the
strap's removal from the heating cabinet.
2.7.3.5. Exposure to water2.7.3.5.1. The strap shall be kept fully immersed for three hours indistilled
water, at a temperature of 20 ± 5 ºC, to which a trace of a wetting
agent has been added. Any wetting agent suitable for the fibre under
test may be used.
2.7.3.5.2. The breaking load shall be determined within 10 minutes of the
strap's removal from the water.
2.7.3.6. Conditioning by abrasion
2.7.3.6.1. The abrasionprocedure shall be performed onevery device in
which the strap is incon tact with a rigid part of the belt. However,
the type 1 abrasion test (2.7.3.6.4.1) need not be carried out on the
belt-adjusting device where the micro-slip test (2.7.4) shows that the
strap slips less than half the prescribed amount. The setting on the
test apparatus shall approximately maintain the relative position of
strap and contact area.
2.7.3.6.2. The samples to be subjected to abrasionshall be kept for a
minimum of 24 hours in an atmosphere having a temperature of 20
± 5 ºC and a relative humidity of 65 ± 5 %. The room temperature
during testing shall be between 15 and 30 ºC.
2.7.3.6.3. The table below sets out the requirements for each abrasion proce-
dure:
Load daNFrequency
HzNumber of
cyclesShift mm
Type 1 procedure 2·5 0·5 5 000 300 + 20
Type 2 procedure 0·5 0·5 45000 300 ± 20
Type 3 procedure (1) 0—5 0·5 45000 —
(1) See 2.7.3.6.4.3.
The shift giveninthe fifth columnof this table represen ts the
amplitude of a back-and-forth motion applied to the strap.
2.7.3.6.4. Particular procedure conditions.2.7.3.6.4.1. Type 1 procedure: for cases where the strap slides through an
adjusting device.
The 2·5 daN load shall be vertically and permanently applied to one
sectionof the strap.
The other section, set horizontally, shall be subjected to a back-and-
forth motion.
The adjusting device shall be so placed that the horizontal section of
the strap shall remain under load (see Annex XII, fig. 1).1977L0541 — EN — 29.06.1987 — 005.001 — 13
▼M2
2.7.3.6.4.2. Type 2 procedure: in cases where the strap changes direction once
onpassin g through a rigid part.
The angles which both straps ends make with each other must be as
shown in Annex XII, Figure 2.
A permanent load of 0 · 5 daN must be applied. If the strap changes
direction more than once on passing through a rigid part, the 0·5
daN load may be increased so as to achieve the prescribed 300
mm of strap movement through that rigid part.
2.7.3.6.4.3. Type 3 procedure: for cases where the strap is fixed to a rigid part
by sewing or similar means.
The total shift shall be 300 ± 20 mm and the 5 daN load shall be
applied only during the time corresponding to a shift of 100 ± 20
mm for each half period (see Annex XII, fig. 3).
2.7.4. Micro-slip test (see Annex XII, fig. 3) .
2.7.4.1. The components or devices to be subjected to the micro-slip test
shall be kept for a minimum of 24 hours before testing in an atmo-
sphere having a temperature of 20 ± 5 ºC and a relative humidity of
65 ± 5 %.
The test shall be carried out at a temperature between15 an d 30 ºC.
2.7.4.2. It shall be ensured that the free section of the adjusting device
points either up or down on the test bench, as in the vehicle.
2.7.4.3. A 5 daN load shall be attached to the lower end of the section of
strap.
The other end shall be subjected to a back-and-forth motion the
total amplitude being 300 ± 20 mm (see figure).
2.7.4.4. If there is a free end serving as reserve strap, it must in no way be
fastened or clipped to the section under load.
2.7.4.5. It shall be ensured that on the test bench the strap, in the slack posi-
tion, descends in a concave curve from the adjusting device, as in
the vehicle.
The 5 daN load applied onthe test ben ch shall be guided vertically
in such a way as to prevent the load swaying and the belt twisting.
The attachment shall be fixed to the 5 daN load as in the vehicle.
2.7.4.6. Before the actual start of the test, a series of 20 cycles shall be
completed so that the self-tightening system settles properly.
2.7.4.7. 1 000 cycles shall be completed at a frequency of 0·5 cycle per
second, the total amplitude being 300 ± 20 mm. The 5 daN load
shall be applied only during the time corresponding to a shift of
100 ± 20 mm for each half period.
2.7.5. Test of breaking strength of strap (static test)
2.7.5.1. The test shall be carried out each time ontwo n ew samples of strap,
of sufficient length, conditioned in accordance with one of the
provisions of 2.7.3.
2.7.5.2. Each strap shall be gripped between the clamps of a tensile-testing
machine. The clamps shall be so designed as to avoid breakage of
the strap at or near the point of contact with the clamps. The speed
of traverse shall be about 100 mm per minute. The free length of
the sample betweenthe clamps of the machin e at the start of the
test shall be 200 ± 40 mm.
2.7.5.3. Whenthe load reaches 980 daN, the width of the strap shall be
measured without stopping the machine.
2.7.5.4. The load shall then be increased until the strap breaks, and the
breaking load shall be noted.
2.7.5.5. If the strap slips or breaks at the point of contact with one of the
clamps or within10 mm of either of them, the test shall be in valid
and a new test shall be carried out on another sample.
2.7.6. Static test of belt components incorporating rigid parts
2.7.6.1. The buckle and strap adjusting device must be connected to the
tensile-testing machine by their normal attachments and a load of1977L0541 — EN — 29.06.1987 — 005.001 — 14
▼B
▼M2
▼M2
980 daN must be applied. If the buckle or adjusting device is part of
the attachment or of the common component of a three-point strap,
the buckle or adjusting device must be tested together with the
attachment in accordance with Item 2.7.6.2, except in the case of
retractors with a returnpulley at the upper strap an chorage. Inthis
case the test load must be 980 daN and the length of strap
remaining on the reel at the moment of locking must be as close
as possible to 450 mm.
2.7.6.2. The attachmen ts shall be tested inthe way described in2.7.6.1, but
the load shall be 1 470 daN and, subject to the provisions of the
second sentence of 2.7.8.1., shall be applied in the least favourable
conditions likely to occur in a vehicle in which the belt is correctly
installed. In the case of retractors, the test shall be performed with
the strap completely unwound from the reel.
2.7.6.3. Two samples of a belt assembly shall be placed ina low-tempera-
ture chamber at a temperature of − 10 ± 1 ºC for two hours.
Immediately after being removed from the chamber, the mating
parts of the buckle shall be locked together manually.
2.7.6.4. Two samples of the complete belt assembly shall be placed ina
low-temperature chamber at − 10 ± 1 ºC for two hours. The rigid
items and ►M2parts made of plastics ◄under test shall then be
laid inturnupona flat steel surface (which has beenkept with the
samples inthe low-temperature chamber), placed onthe horizon tal
surface of a compact rigid block with a mass of at least 100 kg;
within 30 seconds of their being removed from the low-temperature
chamber, an18 kg steel mass shall be allowed to fall un der gravity
from a height of 300 mm onto the item. The impact face of the
mass shall have a hardness of at least 45 HRC and take the form
of a convex surface having a transverse radius of 10 mm and a
longitudinal radius of 150 mm. One sample shall be tested with the
axis of the curved bar in line with the strap, and the other sample
shall be tested at 90º to the strap.
2.7.6.5. Buckles having parts common to two safety belts shall be loaded in
such a way as to simulate the conditions of use in a vehicle with the
seats inthe mid-positionof their adjustmen t. The directionof appli-
cationof the load shall be established inaccordan ce with 2.7.8.1. A
load of 1 470 daN shall be applied simultaneously to each of the
straps. Suitable apparatus for the above test is shown in Annex XI.
2.7.6.6. When testing any manual adjusting device, the strap shall be drawn
steadily through that device, having regard to normal conditions of
use, at a rate of approximately 100 mm/s, and the maximum force
shall be measured to the nearest 0·1 daN after the first 25 mm of
strap movement. The test shall be carried out in both directions of
strap travel through the adjusting device, the strap being cycled 10
times prior to measurement.
2.7.7. Additional tests for retractors
2.7.7.1. Durability of retractor mechanism2.7.7.1.1. The strap shall be withdrawnan d allowed to retract for the required
number of cycles at a rate of not more than 30 cycles per minute. In
the case of emergency locking retractors, a snatch shall be intro-
duced at each fifth cycle to lock the retractor. The snatches shall
occur in equal numbers at each of five different extractions, namely,
90, 80, 75, 70 and 65% of the total length of the strap on the
retractor. However, where more than900 mm is provided, the above
percentages shall be related to the final 900 mm of strap which
remainwoun d onthe retractor.
2.7.7.1.2. Suitable apparatus for the tests specified in2.7.7.1.1 is shownin
Annex IV.
2.7.7.2. Locking of emergency locking retractors2.7.7.2.1. The retractor shall be tested for locking when 300 ± 3 mm of strap
remainwoun d onthe retractor reel.
2.7.7.2.1.1. In the case of a locking retractor actuated by strap movement, the
extractionshall be inthe directioninwhich it n ormally occurs
whenthe retractor is in stalled ina vehicle.
2.7.7.2.1.2. When retractors are being tested for sensitivity to vehicle decelera-
tion, they shall be tested at the above extraction in both directions1977L0541 — EN — 29.06.1987 — 005.001 — 15
▼B
▼M2
▼B
▼B
along two mutually perpendicular axes, which are horizontal if the
retractor is to be installed in a vehicle as specified by the safety belt
manufacturer. One of these test directions shall be chosen by the
technical service conducting the approval test so as to give the
most adverse conditions with respect to actuation of the locking
mechanism.
2.7.7.2.2. Suitable apparatus for the tests specified in2.7.7.2.1 is described in
Annex V. The design of any such apparatus shall be such that the
required accelerationis achieved at anaverage rate of in crease of
at least►M225 g◄per second.
2.7.7.2.3. For the purpose of testing the requirements of 2.4.5.2.1.3 and
2.4.5.2.1.4, the retractor shall be mounted on a horizontal table and
the table tilted at a speed not exceeding 2º per second until locking
has occurred. The test shall be repeated inother direction s so as to
ensure that the requirements are fulfilled.
2.7.7.3. Dust resistance
2.7.7.3.1. The retractor shall be placed ina test chamber, as showninAn n ex
VI. Its relative positionshall be the same as that inwhich it is
mounted in the vehicle. The test chamber shall contain a quantity
of dust which meets the requirements of 2.7.7.3.2. 500 mm of the
strap shall be extracted from the retractor and kept extracted, except
that it shall be subjected to 10 complete cycles of retractionan d
withdrawal within one or two minutes after each agitation of the
dust.
For a period of five hours, the dust shall be agitated every 20
minutes for five seconds by compressed air which is dry and free
of lubricating oil, passing through an aperture 1·5 ± 0·1 mm in
diameter at a gauge pressure of 5·5 × 105± 0·5 × 105Pa.
2.7.7.3.2. The dust used inthe test described in2.7.7.3.1 shall con sist of about
1 kg of dry quartz. The particle size distributionshall be as follows:
(a) passing through a 150 µm aperture, 104 µm wire diameter: 99
to 100 %;
(b) passing through a 105 µm aperture, 64 µm wire diameter: 76
to 86 %;
(c) passing through a 75 µm aperture, 52 µm wire diameter: 60 to
70 %.
2.7.7.4. Retracting force
2.7.7.4.1. ►M2The retracting force must ◄be measured with the safety
belt assembly fitted to a manikin, as in the dynamic test prescribed
in2.7.8. The strap ten sionshall be measured as close as possible to
the points of contact with (but just clear of) the manikin ►M2,
while the strap is being retracted at a speed of approximately 0·6m per minute. ◄
2.7.8. Dynamic tests of the belt assembly or the restraint system
2.7.8.1. The belt assembly shall be mounted on a trolley equipped with the
seat and the anchorages defined in Annex VII. If, however, the belt
assembly is intended for a specific vehicle or for specific types of
vehicle, the distances between the manikin and the anchorages shall
be determined by the service conducting the tests, in accordance
either with the fitting instructions supplied with the belt, or with
the date supplied by the manufacturer of the vehicle.
2.7.8.1.1. If a safety belt forms part of anassembly which is the subject of an
application for component type-approval as a restraint system, this
safety belt must be mounted on that part of the vehicle structure to
which it is normally fitted and that part must be attached to the test
trolley as follows:
2.7.8.1.2. The method used to secure the vehicle during the test shall not be
such as to strengthen the anchorages of the seats or safety belts, or
to lessenthe n ormal deformationof the structure.
No forward part of the vehicle shall be present which, by limiting
the forward movement of the manikin, apart from the feet, would
reduce the load imposed on the restraint system during the test.
The discarded parts of the structure canbe replaced by parts of1977L0541 — EN — 29.06.1987 — 005.001 — 16
▼M2
▼B
▼M2
▼B
▼B
equivalent strength, provided that they do not hinder the forward
movement of the manikin.
2.7.8.1.3. A securing device shall be regarded as satisfactory if it produces no
effect on an area extending over the whole width of the structure,
and if the vehicle or the structure is blocked or immobilized in front
at a distance of not less than 500 mm from the anchorage of the
restraint system tested. At the rear, the structure shall be secured at
a distance behind the anchorages which is sufficient to ensure that
the requirements of 2.7.8.1.2 are fulfilled.
2.7.8.1.4. The seats shall be adjusted and placed in the driving or travelling
position considered by the technical service conducting the approval
tests as providing the most adverse conditions of strength consistent
with the positioning of the manikin in the vehicle. ►M2If the seat
back is adjustable, it must be locked as specified by the manufac-
turer or, in the absence of any specification, locked in such a
manner as to form an effective angle as close as possible to 25º in
the case of vehicles incategories M1and N1and as close as possible
to 15º inthe case of vehicles of all other categories. ◄
2.7.8.1.5. For the purpose of assessing the requirements of
►M22.6.1.4.1 ◄, the seat shall be regarded as being in its most
forward driving or travelling position appropriate to the dimensions
of the manikin.
2.7.8.1.6. All seats of the same group shall be tested simultaneously.
2.7.8.2. The belt assembly must be attached to the manikin described in
Annex VIII. A board 25 mm thick must be placed between the
back of the manikin and the seat back. The belt must be firmly
fastened around the manikin. The board must then be removed and
the manikin so positioned that the whole length of its back is in
contact with the seat back.
2.7.8.3. The free ends of the straps shall extend sufficiently far beyond the
adjusting devices to allow for slip.
2.7.8.4. The trolley shall thenbe propelled insuch a way that, at the
moment of impact, its free running speed is 50 ± 1 km/h and the
manikin remains stable. The stopping distance of the trolley shall
be 400 ± 50 mm. The trolley shall remainhorizon tal throughout
deceleration. Deceleration of the trolley shall be achieved by using
the apparatus shown in Annex VII or any other device giving
equivalent results. The apparatus shall meet the performance
requirements given in Annex IX.
2.7.8.5. The trolley speed immediately before impact and the maximum
forward displacement of the manikin shall be measured.
2.7.8.6. After impact, the belt assembly or restraint system and its rigid
parts shall be inspected visually, without opening the buckle, in
order to determine whether there has been any failure or breakage.Inthe case of restrain t systems, a check shall also be made, after the
test, to establish whether the parts of the vehicle structure which are
attached to the trolley have undergone any permanent deformation.
Any such deformation found shall be taken into account in any
calculationmade inaccordan ce with ►
M22.6.1.4.1 ◄.
2.7.9. Buckle-opening test
2.7.9.1. Belt assemblies which have already undergone the dynamic test in
accordance with 2.7.8, shall be used for this test.
2.7.9.2. The belt assembly must be detached from the test-trolley without
the buckle being opened. A direct tensile load of 30 daN must
then be applied to the buckle. If the buckle is connected to a rigid
part, account must be taken, when the force is applied, of the angle
formed by the buckle and the rigid part during the dynamic test. At
a speed of 400 ± 20 mm/min., a load must be applied to the
geometric centre of the buckle-release button along a fixed axis
running parallel to the initial direction of motion of the button.
The buckle must be held inplace by a rigid support whenthe force
required to open the buckle is applied. The abovementioned load
must not exceed the limit specified in Item 2.4.2.5. The point of
contact of the test assembly must be spherical, with a radius of 2·5
± 0·1 mm. It must have a smooth metal surface.1977L0541 — EN — 29.06.1987 — 005.001 — 17
▼M2
▼B
▼M2
▼M2
►M22.7.9.3.◄The buckle-opening force shall be measured and any failure
of the buckle noted.
►M22.7.9.4.◄After the buckle-opening test, the components of the belt
assembly or restraint system which have undergone the tests
prescribed in 2.7.8 shall be inspected and the extent of the damage
sustained by the belt assembly or restraint system in the dynamic
test shall be recorded inthe test report.
2.7.10. Test report
The test report shall record the results of the tests prescribed in2.7
and, in particular, the trolley speed, the maximum forward displace-
ment of the manikin, the position of the buckle and any failure or
breakage. If, pursuant to 2.7.8.1, the anchorage requirements of
Annex VII have not been respected, the report shall describe how
the belt assembly or the restraint system is mounted and specify
important angles and dimensions. The report shall also mention
any distortion or breakage of the buckle that occurred during the
test.
Inthe case of a restrain t system, the test report shall also specify the
method of attaching the vehicle structure-to the trolley, the position
of the seats and the tilt of the seat backs. If the forward displace-
ment of the manikin has exceeded the values prescribed in
2.6.1.2.2, the report shall state whether the requirements of
►M22.6.1.4.1 ◄have beenmet.
2.8.Verification ofconformity
2.8.1. Minimum requirements for verification of conformity
2.8.1.1. The manufacturer or his authorized representative holding the EEC
component type-approval mark shall be obliged to carry out contin-
uous quality control, or see that it is carried out, so as to ensure that
productionof the ►M2belts and restraint systems ◄is uniform
and conforms to the provisions of this Directive.
2.8.1.2. The manufacturer or his authorized representative shall be held
responsible for:
(a) the existence of quality control procedures;
(b) the availability of equipment necessary for the verification of
conformity;
(c) keeping records of test results, test reports and any documents
attached;
(d) the use of the test results to verify and ensure the consistency of
the►M2belts and restraint systems ◄manufactured,
allowing for the variations admissible in industrial production.
2.8.1.3. The samples selected for verification of conformity shall undergo
such tests as may be chosen by agreement with the competent
authority from among those described in 2.6 and 2.7.
2.8.1.4. The following minimum requirements in particular must be
complied with.
2.8.1.4.1. All belts and restraint systems incorporating an emergency-locking
retractor must be checked inrespect of their complian ce with:
— the provisions of Item 2.4.5.2.1.1 in accordance with the test
conditions defined in Item 2.4.5.2.3, or
— the provisionset out inItem 2.4.5.2.1.4.
If the latter provisionis fulfilled, at least 10 % of the production
batch must also be tested in accordance with the provisions of
Item 2.4.5.2.1.1.
2.8.1.4.2. The check onthe resistan ce of the samples of productionbelts in
the dynamic test shall be carried out in accordance with the proce-
dure laid downin2.7.8. This check shall be carried out ona
statistical and random basis, and in any event with a frequency of
1 in 25000 belts produced or one per month of production, which-
ever is the greater.1977L0541 — EN — 29.06.1987 — 005.001 — 18
▼B
▼M2
▼B
▼B
A minimum frequency of one per year shall be permitted where
annual production is 5 000 assemblies or less.
During the test, after impact, the assembly shall be visually exam-
ined, without opening the buckle, to establish whether there has
beenan y failure or breakage. If anassembly should fail the test,
the manufacturer shall select further samples and take the necessary
steps to ensure the conformity of production.
2.8.2. Minimum requirements for spot checks made by Member States
2.8.2.1. The frequency of spot checks shall be such that the tests specified in
2.8.2.2 are performed on at least 1 in 5 000 safety belts and restraint
system of each approved type produced, with a minimum frequency
of one and a maximum frequency of 50 for any 12 months of
production.
2.8.2.2. Belts selected for verificationof con formity with anapproved type
shall undergo such tests as may be chosen by the competent
authority from among those described in 2.6 and 2.7.
At least 10 % of the belts selected for verificationof con formity,
but with a minimum of one and a maximum of five for 12 months
production, shall undergo a dynamic test.
2.8.2.3. If one of the samples fails the test to which it is subjected, a further
test shall be carried out onthree other samples.
If one of the latter fails the test, Article 3 (2) shall be applied.
2.8.2.4. Tests shall be carried out on belts offered or intended for sale.
2.9.Instructions
Every safety belt shall be accompanied by the instructions specified
in Annex X.
3. REQUIREMENTS CONCERNING INSTALLATION IN THE
VEHICLE
3.1.Vehicle equipment
Any vehicle covered by Article 9, in categories M1or N1, or cate-
gory M2(except vehicles of a permissible maximum weight
exceeding 3 500kg and those which include places specially
designed for standing passengers) must be equipped with safety
belts or restraint systems which satisfy the requirements of this
Directive and have the following belt arrangements (with which
neither non-locking locking retractors (1.8.1) or manually unlocking
retractors (1.8.2) canbe used).
Incases where the other vehicles covered by Article 9 are fitted
with safety belts or restraint systems, these must comply with all
the requirements of this Directive, with the exception of sections
3.1.1 to 3.1.3.
3.1.1. for the front outboard seating positions, three-point safety belts with
emergency locking retractors having multiple sensitivity (1.8.4);
however,
3.1.1.1. for the passenger seat, automatically locking retractors (1.8.3) are
permitted;
3.1.1.2. for the passenger seat of category M2vehicles, lap-belts, whether or
not fitted with retractors, are considered adequate where the wind-
screen is located outside the reference zone defined in Annex II to
Directive 74/60/EEC.
As regards safety belts, the windscreen is considered as part of the
reference zone when it is capable of entering into static contact with
the test apparatus according to the method described in Annex II to
Directive 74/60/EEC.
3.1.2. for front central seating positions, three-point safety belts, whether
or not fitted with retractors;
3.1.2.1. however, for front central seating positions, lap-belts, whether or not
fitted with retractors, shall be considered adequate where the wind-1977L0541 — EN — 29.06.1987 — 005.001 — 19
▼M2
▼M1
▼B
▼B
screen is located outside the reference zone defined in Annex II to
Directive 74/60/EEC;
as regards safety belts, the windscreen shall be considered as part of
the reference zone when it is capable of entering into static contact
with the test apparatus according to the method described in Annex
II to Directive 74/60/EEC;
3.1.2.2. notwithstanding 3.1.2 and 3.1.2.1 and until 1 January 1979, each
front central seat may be equipped with only a lap-belt, whether or
not fitted with retractors;
3.1.3. at rear seating positions of vehicles in category M1, lap-belts or
three-point belts, whether or not fitted with retractors;
3.1.4. on three-point belts fitted with retractors, one retractor must operate
at least onthe diagon al strap.
3.1.5. Notwithstanding the foregoing provisions, on vehicles in categories
N1and M2, an emergency locking retractor of type 4N (1.8.5) may
be permitted instead of a retractor of type 4 (1.8.4), where it hasbeenshownto the satisfactionof the services respon sible for the
tests that the fitting of a type 4 retractor would impede the driver.
3.2.General requirements
3.2.1. Safety belts and restraint systems shall be fixed to anchorages
conforming to the specifications of Directive 76/115/EEC.
3.2.2. The safety belts and the restraint systems shall be so installed that,
when properly worn, they will work satisfactorily and reduce the
risk of bodily injury in the event of an accident. In particular they
shall be so installed that:
3.2.2.1. the straps are not liable to assume a dangerous configuration;
3.2.2.2. that the danger of a correctly positioned belt slipping from the
shoulder of a wearer as a result of his/her forward movement is
reduced to a minimum;
3.2.2.3. the risk of the strap deteriorating through contact with sharp rigid
parts of the vehicle or seat structure is reduced to a minimum.
3.3.Specialrequirementsforrigidpartsincorporatedinsafetybelts
orrestraintsystems
3.3.1. Rigid parts, such as the buckles, adjusting devices and attachments,
shall not increase the risk of bodily injury to the wearer or to other
occupants of the vehicle in the event of an accident.
3.3.2. The device for releasing the buckle shall be clearly visible to and
within easy reach of the wearer and shall be so designed that it
cannot be opened inadvertently or accidentally. The buckle shall
also be located insuch a positionthat it is readily accessible to a
rescuer needing to release the wearer in an emergency.
The buckle shall be so installed that, both when not under load and
when sustaining the wearer's weight, it is capable of being released
by the wearer with a single simple movement of either hand in one
direction. In the case of safety belts or restraint systems for front
outboard seating positions, the buckle shall also be capable of being
locked in the same manner.
A check shall be made to ensure that, if the buckle is in contact
with the wearer, the width of the contact surface is not less than
46 mm.
3.3.3. When the belt is being worn, it shall either adjust automatically to
fit the wearer or be so designed that the manual adjusting device is
readily accessible to the wearer when seated and is convenient and
easy to use. It shall also be possible for it to be tightened with one
hand to suit the build of the wearer and the position of the vehicle
seat.1977L0541 — EN — 29.06.1987 — 005.001 — 20
▼M1
▼B
▼M1
▼B
▼M2
▼B
▼B
3.3.4. Safety belts or restraint systems incorporating retractors shall be so
installed that the retractors are able to operate correctly and stow
the strap efficiently.1977L0541 — EN — 29.06.1987 — 005.001 — 21
▼B
ANNEX II
MODELEECCOMPONENTTYPE-APPROVALCERTIFICATE
(Maximumformat:A4(210×297mm))
1977L0541 — EN — 29.06.1987 — 005.001 — 22
▼B
ANNEX III
EECCOMPONENTTYPE-APPROVALMARK
1. GENERAL
1.1. Every safety belt or restraint system conforming to a type approved
under this Directive shall bear an EEC component type-approval
mark.
The EEC component type-approval mark shall consist of:
1.1.1. a rectangle surrounding the lower-case letter ‘e’ followed by the
distinguishing letter(s) or number of the Member State which has
granted the EEC component type-approval:
1 for Germany
2 for France
3 for Italy
4 for the Netherlands
6 for Belgium
9 for Spain
11 for the United Kingdom13 for Luxembourg
DK for Denmark
EL for GreeceIRL for Ireland
P for Portugal;
1.1.2. the EEC component type-approval number, located below the
rectangle;
1.1.3. the following additional symbol or symbols located above the
rectangle:
1.1.3.1. the letter ‘A’ inthe case of a three-poin t belt, the letter ‘B’ inthe case
of a lap belt and the letter ‘S’ in the case of a special type belt.
1.1.3.2. The symbols described in1.1.3.1 shall be supplemen ted by the
following marks:
1.1.3.2.1. the letter ‘e’ inthe case of a belt fitted with anen ergy absorber;1.1.3.2.2. the letter ‘r’ inthe case of a safety belt fitted with a retractor,
followed by the number of the type of retractor used, in accordance
with 1.8 of Annex I, and the letter ‘m’ if the retractor used is an
emergency locking retractor with multiple sensitivity.
1.1.3.3. The symbols described in1.1.3.1 shall be preceded by the letter ‘Z’
whenthe safety belt is part of a restrain t system.
1.1.4. Belts fitted with a type 4N retractor shall also bear a symbol
consisting of a rectangle with a vehicle of category M
1crossed out,
indicating that the use of this type of retractor is prohibited in vehi-
cles of that category.
1.2. The details described in 1.1 shall be clearly legible and indelible, and
must be provided either by means of a label or by direct marking. The
label or marking shall be resistant to wear.1977L0541 — EN — 29.06.1987 — 005.001 — 23
▼A2
▼M3
▼A2
▼B
▼M2
▼B
▼B
2. DIAGRAMS OF EEC COMPONENT TYPE-APPROVAL MARKS
2.1.
The belt bearing the above EEC component type-approval mark is a
three-point belt (‘A’) fitted with an energy absorber (e) and approved
in the Netherlands (e 4) under the number 2439.
►(1)M2
2.2.
The belt bearing the above EEC component type-approval mark is a
lap belt (‘B’) fitted with a type 4 retractor with multiple sensitivity
and approved in the Netherlands (e 4) under the number 2439.
►(1)M2
2.3.
The belt bearing the above EEC component type-approval mark is a
special type of belt (‘S’), fitted with an energy absorber (e), forming
part of a restraint system (‘Z’) and approved in the Netherlands (e 4)
under the number 2439.
►(1)M21977L0541 — EN — 29.06.1987 — 005.001 — 24
▼M2
2.4.
The belt bearing this type-approval mark is a three-point belt (‘A’)
having a multiple-sensitivity (‘m’) type 4N (‘r4N’) retractor, in
respect of which EEC component type-approval was granted in the
Netherlands (‘e4’) under the number 2439. This belt shall not be
fitted to vehicles of category M1.
Note:
The EEC component type-approval number and symbol(s) shall be
placed close to the rectangle and either above or below the letter
‘e’or to the left or right of that letter. The digits of the component
type-approval number shall be placed on the same side of the letter
‘e’ and shall face in the same direction. The additional symbol(s)
shall be diametrically opposite the component type-approval number.
The use of roman numerals as component type-approval numbers
must be avoided so as to prevent any confusion with other symbols.1977L0541 — EN — 29.06.1987 — 005.001 — 25
▼B
▼B
ANNEX IV
EXAMPLEOFANAPPARATUSTOTESTDURABILITYOFRETRACTORMECHANISM
1977L0541 — EN — 29.06.1987 — 005.001 — 26
▼B
ANNEX V
EXAMPLE OF AN APPARATUS TO TEST LOCKING OF EMER-
GENCYLOCKINGRETRACTORS
A suitable apparatus is illustrated in the figure and consists of a motor-driven
cam, the follower of which is attached by wires to a small trolley mounted on
a track. The cam follower incorporates a ‘lost motion’ device which absorbs any
movement should the reel lock before the full stroke of the follower is
completed. The cam design and motor speed combination is such as to givethe required accelerationat a rate of in crease of accelerationas specified in
2.7.7.2.2 of Annex I, and the stroke is arranged to be in excess of the maximum
permitted strap movement before locking.
On the trolley a carrier is mounted which can be swivelled to enable the
retractor to be mounted in varying positions relative to the direction of move-
ment of the trolley.
When testing retractors for sensitivity to strap movement, the retractor is
mounted on a suitable fixed bracket and the strap is attached to the trolley.
When carrying out the above tests any brackets, etc. supplied by the manufac-
turer or by his representative shall be incorporated in the test installation to
simulate as closely as possible the intended installation in a vehicle.
Any additional brackets, etc., that may be required to simulate the installation as
intended in a vehicle shall be provided by the manufacturer or by his represen-
tative.
1977L0541 — EN — 29.06.1987 — 005.001 — 27
▼B
ANNEX VI
EXAMPLEOFANAPPARATUSFORDUSTRESISTANCETESTS
1977L0541 — EN — 29.06.1987 — 005.001 — 28
▼M2
▼B
ANNEX VII
DESCRIPTION OF TROLLEY, SEAT, ANCHORAGES AND STOPPING
DEVICE
1. TROLLEY
For tests on safety belts the trolley, carrying the seat only, shall have a mass
of 400 ± 20 kg. For tests onrestrain t systems the trolley, with the vehicle
structure attached, shall have a mass of 800 kg. However, if necessary, the
total mass of the trolley and vehicle structure may be increased by incre-
ments of 200 kg. In no case shall the total mass differ from the nominal
value by more than± 40 kg.
2. SEAT
►M2Except inthe case of tests onrestrain t systems, the seat shall be of
rigid construction and present a smooth surface. ◄The particulars givenin
fig. 1 hereto shall be respected, care being taken that no metal part can come
into contact with the belt.
3. ANCHORAGES
The anchorages shall be positioned as shown in Figure 1. The circular marks
which correspond to the arrangement of the anchorages, show where the ends
of the belt are to be connected to the trolley or to the load transducer, as the
case may be. The anchorages for normal use are the points A, B and K if the
strap length between the upper edge of the buckle and the hole for the attach-
ment of the strap support is not more than 250 mm. Otherwise, the points A1and B1shall be used. The structure carrying the anchorages shall be rigid.
The upper anchorage must not be displaced by more than 0·2 mm in the
longitudinal direction when a load of 98 daN is applied to it in that direction.
The trolley shall be so constructed that no permanent deformation shall occur
in the parts bearing the anchorages during the test.
If a fourth anchorage is necessary in order to attach the retractor, this ancho-
rage:
— shall be located in the vertical longitudinal plane passing through K,
— shall enable the retractor to be tilted to the angle prescribed by the manu-
facturer,
— shall be located on the arc of a circle with centre K and with radius KB1
= 790 mm if the length between the upper strap guide and the strap outlet
at the retractor is not less than 540 mm or, in all other cases, on the arc
of a circle with centre K and radius 350 mm.
4. STOPPING DEVICE
This device consists of two identical absorbers mounted in parallel, except in
the case of restraint systems when four absorbers shall be used for a nominal
mass of 800 kg. If necessary, an additional absorber shall be used for each
200 kg increase of nominal mass.
Each absorber comprises:
— anouter casin g formed from a steel tube,
— a polyurethane energy-absorber tube,
— a polished-steel olive-shaped knob penetrating into the absorber,
— a shaft and an impact plate.
The dimensions of the various parts of this energy absorber are shown in
Figures 2, 3 and 4. The characteristic values of the energy-absorbing material
are given below. Immediately before each test, the tubes must be conditioned
at a temperature of between 15 and 25 ºC for at least 12 hours without being
used. The temperature of the stopping device during the dynamic testing of
safetybelts and restraint systems must be the same as during the calibration
test to within± 2 ºC.1977L0541 — EN — 29.06.1987 — 005.001 — 29
▼M2
▼B
▼M2
▼M2
The requirements relating to the stopping device are set out in Annex IX.
Any other device giving equivalent results is acceptable.
CHARACTERISTICS OF THE ABSORBING MATERIAL
(ASTM method D 735 unless otherwise stated)
Shore hardness A: 95 ± 2 at 20 ± 5 ºC
Breaking strength: Ro≥343 daN/cm2
Minimum elongation: Ao400 %
Modulus:— at 100 % elongation: 108 daN/cm2
— at 300 % elongation: 235 daN/cm2
Low-temperature brittleness (ASTM method D 736): five hours at − 55 ºC
Compressionset (method B): 22 hours at 70 ºC ≤45 %
Density at 25 ºC: 1·05 to 1·10
Ageing in air (ASTM method D 573):— 70 hours at 100 ºC — shore hardness A: max. variation ± 3
— breaking strength: decrease <10 % of R
o
— elongation: decrease < 10 % of Ao
— mass: decrease < 1 %
Immersioninoil (ASTM method No 1 Oil):
— 70 hours at 100 ºC — shore hardness A: max. variation ± 4
— breaking strength: decrease < 15 % of Ro
— elongation: decrease < 10 % of Ao
— volume: swelling < 5 %
Immersioninoil (ASTM method No 3 Oil):
— 70 hours at 100 ºC — breaking strength: decrease < 15 % of Ro
— elongation: decrease < 15 % of Ao
— volume: swelling < 20 %
Immersionindistilled water:
— one week at 70 ºC — breaking strength: decrease < 35 % of Ro
— elongation: increase 20 % of Ao1977L0541 — EN — 29.06.1987 — 005.001 — 30
▼B
▼M2
▼B
Figure 1
Trolley, seat,anchorage▼M21977L0541 — EN — 29.06.1987 — 005.001 — 31
▼B
1977L0541 — EN — 29.06.1987 — 005.001 — 32
▼B
1977L0541 — EN — 29.06.1987 — 005.001 — 33
▼B
1977L0541 — EN — 29.06.1987 — 005.001 — 34
▼B
ANNEX VIII
DESCRIPTIONOFMANIKIN
1. SPECIFICATIONS OF THE MANIKIN
1.1.General
The main characteristics of the manikin are indicated in the following
figures and tables:
fig. 1: side view of head, neck and torso;
fig. 2: front view of head, neck and torso;fig. 3: side view of hip, thighs and lower leg;
fig. 4: front view of hip, thighs and lower leg;
fig. 5: principal dimensions;fig. 6: manikin in sitting position, showing:
— locationof the cen tre of gravity,
— location of points at which displacement shall be
measured,
— shoulder height;
table 1: references, names, materials and principal dimensions of the
components of the manikin;
table 2: mass of head, neck, torso, thigh and lower leg.
1.2.Descriptionofthemanikin
1.2.1. Lower leg structure (see figs. 3 and 4)
The lower leg structure consists of three components:
— a sole plate (30),
— a shintube (29),— a knee tube (26).
The knee tube has two lugs which limit the movement of the lower leg in
relationto the thigh.
The lower leg canrotate rearwards about 120º from the straight position .
1.2.2. Thigh structure (see figs. 3 and 4)
The thigh structure consists of three components:
— a knee tube (22),
— a thigh bar (21),— a hip tube (20).
Movement of the knee is limited by two cut-outs in the knee tube (22)
which engage with the lugs of the leg.
1.2.3. Torso structure (see figs. 1 and 2)
The torso structure consists of the following components:
— a hip tube (2),
— a roller chain(4),
— ribs (6) and (7),— a sternum (8),— chain attachments (3 and, partly, 7 and 8).
1.2.4. Neck(see figs. 1 and 2)
The neck consists of seven polyurethane discs (9). The degree of stiffness
of the neck can be adjusted by means of a chain tensioner.
1.2.5. Head(see figs. 1 and 2)
The head (15) is hollow; the polyurethane is reinforced by steel bands
(17). The chain tensioner which enables the neck to be adjusted consists
of a polyamide block (10), a tubular spacer (11) and a tensioning compo-
nent (12 and 13). The head can rotate at the joint between the first and
second cervical vertebrae (the atlas-axis joint), which consists of an
adjuster assembly (14 and 18), a spacer (16) and a polyamide block (10).1977L0541 — EN — 29.06.1987 — 005.001 — 35
▼B
1.2.6. Knee joint (see fig. 4)
The lower leg and thighs are connected by a tube (27) and a tensioner
(28).
1.2.7. Hip joint (see fig. 4)
The thighs and torso are connected by a tube (23), friction plates (24) and
a tensioner (25).
1.2.8. Polyurethane
Type: PU 123 CH compound
Hardness: 50 to 60 shore A
1.2.9. Overall
The manikin is covered by a special overall
2. CORRECTION OF THE MASS
In order to calibrate the manikin to certain values and its total mass, the
mass distributionmust be adjusted by mean s of six correctionweights of
1 kg each which can be fitted to the hip joint. Six other polyurethane
weights of 1 kg each canbe fitted to the back of the torso.
3. CUSHION
A cushion shall be positioned between the chest of the manikin and the
overall. This cushion must be made of polyethylene foam complying with
the following specification:
— hardness: 7 to 10 shore A,
— thickness: 25 ± 5 mm.
It shall be replaceable.
4. ADJUSTMENT OF THE JOINTS
4.1.General
In order to achieve reproducible results, it is necessary to specify and
control the friction at each joint.
4.2.Kneejoint:
tighten the knee joint;
set the thigh and lower leg vertical;rotate the lower leg through 30º;
gradually slacken the tensioner until the lower leg starts to fall under its
ownweight;
lock the tensioner in this position.
4.3.Hipjoints:
increase the rigidity of the hip joints for the purposes of adjustment;
place the thighs in a horizontal position and the torso in a vertical posi-
tion;
rotate the torso forwards until it forms an angle of 60º with the thighs;
gradually slacken the tensioner until the torso starts to fall under its own
weight;
lock the tensioner in this position.
4.4.Atlas-axisjoint:
adjust the atlas-axis joint so that it just resists its own weight in the fore
and aft directions.
4.5.Neck:
the neck can be adjusted by means of the chain tensioner (13);1977L0541 — EN — 29.06.1987 — 005.001 — 36
▼B
when the neck is adjusted, the upper end of the tensioner shall be
displaced between 40 and 60 mm when subjected to a horizontal load of
10 daN.
TABLE 1
Refer-
ence NoName Material Dimensions
1 Body polyurethane —
2 Hip tube steel 76 × 70 × 100 mm
3 Chainattachmen ts steel 25 × 10 × 70 mm
4 Roller chainsteel 3/4 mm
5 Shoulder plane polyurethane —
6 Ribs (rolled section) steel 30 × 30 × 3 × 250 mm
7 Ribs perforated steelplate 400 × 85 × 1·5 mm
8 Sternum perforated steelplate 250 × 90 × 1·5 mm
9 Discs (6) polyurethane ø 90 × 20 mm
ø 80 × 20 mm
ø 75 × 20 mm
ø 70 × 20 mm
ø 65 × 20 mm
ø 60 × 20 mm
10 Block polyamide 60 × 60 × 25 mm
11 Tubular spacer steel 40 × 40 × 2 × 50 mm
12 Tensioning bolt steel M 16 × 90 mm
13 Tensioner nut steel M 1614 Tensioner for atlas-axis
jointsteel ø 12 × 130 mm (M 12)
15 Head polyurethane —
16 Tubular spacer steel ø 18 × 13 × 17 mm
17 Reinforcement plate steel 30 × 3× 500 mm
18 Tensioner nut steel M 12
19 Thighs polyurethane —
20 Hip tube steel 76 × 70 × 80 mm
21 Thigh bar steel 30 × 30 × 440 mm
22 Knee tube steel 52 × 46 × 40 mm
23 Hip connecting tube steel 70 × 64 × 250 mm
24 Frictionplates (4) steel 160 × 75 × 1 mm
25 Tensioner assembly steel M 12 × 320 mm
plates and nuts
26 Knee tube steel 52 × 46 × 160 mm
27 Knee connecting tube steel 44 × 39 × 190 mm
28 Tensioner plate steel Ø 70 × 4 mm
29 Shintube steel 50 × 50 × 2 × 460 mm
30 Sole plate steel 100 × 170 × 3 mm
31 Torso correctionweights
(6)polyurethane 1 kg each
32 Cushionpolyethylen e foam 350 × 250 × 25 mm
33 Overall cottonan d polyamide
straps
34 Hip joint correction
weights (6)steel mass 1 kg each1977L0541 — EN — 29.06.1987 — 005.001 — 37
▼B
TABLE 2
Components of manikinMass inkilo-
grams
Head and neck 4·6 ± 0·3
Torso and arms 40·3 ± 1·0
Thighs 16·2 ± 0·5
Lower leg and foot 9·0 ± 0·5
Total mass including correction weights 74·5 ± 1·01977L0541 — EN — 29.06.1987 — 005.001 — 38
▼B
Fig. 11977L0541 — EN — 29.06.1987 — 005.001 — 39
▼B
Fig. 21977L0541 — EN — 29.06.1987 — 005.001 — 40
▼B
Fig. 3
 Fig. 41977L0541 — EN — 29.06.1987 — 005.001 — 41
▼B
1977L0541 — EN — 29.06.1987 — 005.001 — 42
▼M2
Figure 6
ManikininsittingpositionasshowninAnnexVII,Figure1
G = centre of gravity.
T = torso reference point (located at the rear, on the centre line of the
manikin).
P = pelvis reference point (located at the rear on the centre line of the
manikin).1977L0541 — EN — 29.06.1987 — 005.001 — 43
▼B
ANNEX IX
DESCRIPTION OF CURVE OF TROLLEY'S DECELERATION AS
FUNCTIONOFTIME
(Curvefortestingstoppingdevices)
The decelerationcurve of the trolley weighted with in ert masses to produce a
total of 455 kg ± 20 kg for safety belt tests and 910 kg ± 40 kg for restraint
system tests, where the nominal mass of the trolley and vehicle structure is
800 kg, must remain within the hatched area above. If necessary, the nominal
mass of the trolley and attached vehicle structure can be increased by incre-
ments of 200 kg, in which case an additional inert mass of 28 kg shall be
added per increment. In no case shall the total mass of the trolley, the vehicle
structure and the inert masses differ from the nominal value for calibration tests
by more than± 40 kg. ►M2The stopping distance during calibration of the
stopping device shall be 400 ± 20 mm and the speed of the trolley shall be 50
± 1 km/h. ◄
In both the above cases the measurement equipment shall have a response which
is substantially flat up to 60 Hz with a roll off at 100 Hz. Mechanical reso-
nances associated with transducer mounting should not distort readout data.
Consideration should be given to the effect of cable length and temperature on
frequency response ►M2(1)◄.1977L0541 — EN — 29.06.1987 — 005.001 — 44
(1) These requirements are in accordance with Recommendation ISO R 6478/1980.
▼B
ANNEX X
INSTRUCTIONS
Every safety belt shall be accompanied by instructions covering the following
points in the language or languages of the Member State in which it is to be
placed onsale:
1. Installation instructions (not required if the manufacturer supplies the vehicle
with safety belts already installed) which specify for which vehicle types the
assembly is suitable and the correct method of attachment of the assembly to
the vehicle, including a warning to guard against chafing of the straps.
2. Instructions for use (they may be included in the vehicle user's handbook if
the manufacturer supplies the vehicle with safety belts already installed)
comprising the instructions necessary to ensure that the user obtains the
greatest benefit from the safety belt. In these instructions reference should
be made to:
(a) the importance of wearing the belt on all journeys;
(b) the correct manner of wearing the belt and in particular:
— the intended location of the buckle,
— the need for belts to fit tightly when in use,— the correct positioning of the straps and the need to avoid twisting
them,
— the fact that each belt should be used by one occupant only and that a
belt must not be put round a child seated on a passenger's lap;
(c) the method of fastening and unfastening the buckle;
(d) the method of adjusting the belt;
(e) the method of operating any retractor which is incorporated in the
assembly and the method of checking that it has locked;
(f) the recommended methods of cleaning the belt and reassembling it after
cleaning where appropriate;
(g) the n eed to replace the safety belt whenit has beeninuse ina serious
accident or shows signs of severe fraying or of having been cut;
(h) the fact that the belt must not be altered or modified in any way since
such changes may render the belt ineffective; in particular where the
design permits parts to be disassembled, instructions to ensure correct
reassembly must be given;
(i) the fact that the belt is intended for use by occupants of adult build;(j) stowage of the belt whenn ot inuse.
3. Inthe case of safety belts fitted with a type 4N retractor, it shall be in dicated
in the installation instructions and on any packaging, that this belt is not
suitable for installation in passenger vehicles with not more than nine seats,
including that of the driver.1977L0541 — EN — 29.06.1987 — 005.001 — 45
▼M2
▼B
ANNEX XI
DUALBUCKLETEST
(outlinedin2.7.6.5ofAnnexI)
1977L0541 — EN — 29.06.1987 — 005.001 — 46
▼B
ANNEX XII
ABRASIONANDMICROSLIPTESTS
Fig. 1
Type 1 test
Examples of test arrangements corresponding to the type of adjusting device1977L0541 — EN — 29.06.1987 — 005.001 — 47
▼B
Fig. 2
Type 2 test1977L0541 — EN — 29.06.1987 — 005.001 — 48
▼B
Fig. 3
Type 3 test and micro-slip test1977L0541 — EN — 29.06.1987 — 005.001 — 49
▼B
ANNEX XIII
CORROSIONTEST
1. TEST APPARATUS
1.1. The apparatus shall consist of a mist chamber, a salt solution reservoir, a
supply of suitably conditioned compressed air, one or more atomizing
nozzles, sample supports, provision for heating the chamber and the neces-
sary means of control. The size and constructional details of the apparatus
shall be optional, provided that the test conditions are met.
1.2. It is important to ensure that drops of solution accumulated on the ceiling
or cover of the chamber do not fall on test samples, and
1.3. that drops of solution which fall from test samples are not returned to the
reservoir and then atomized again.
1.4. The apparatus shall not be constructed of materials which affect the corro-
siveness of the mist.
2. LOCATION OF TEST SAMPLES IN THE MIST CABINET
2.1. Samples, except retractors, shall be supported or suspended between 15º
and 30º from the vertical and preferably parallel to the principal direction
of horizontal flow of mist through the chamber, as determined, in relation
to the dominant surface being tested.
2.2. Retractors shall be supported or suspended in such a manner that the axes
of the reels for storing the strap are normal to the principal direction of
horizontal flow of mist through the chamber. The strap opening in the
retractor shall also be facing this principal direction.
2.3. Each sample shall be so placed as to permit the mist to settle freely onall
samples.
2.4. Each sample shall be so placed as to prevent salt solution dripping from
one sample to another.
3. SALT SOLUTION
3.1. The salt solutionshall be prepared by dissolvin g 5 ± 1 parts by mass of
sodium chloride in95 parts of distilled water. The salt shall be sodium
chloride substantially free from nickel and copper and containing in the
dry state not more than 0·1 % of sodium iodide and not more than 0·3 %
of impurities intotal.
3.2. The solutionshall be such that whenatomized at 35 ºC the collected solu-
tionis inthe pH ran ge of 6·5 to 7·2.
4. AIR SUPPLY
The compressed air supply to the nozzle or nozzles for atomizing the salt
solution shall be free from oil and impurities, and maintained at a pressure
of between70 kN/m2and 170 kN/m2.
5. CONDITIONS IN THE MIST CHAMBER
5.1. The exposure zone of the mist chamber shall be maintained at 35 ± 5 ºC.
At least two cleanmist collectors shall be placed withinthe exposure zon e
to prevent drops of solution from the test samples or any other source from
accumulating. The collectors shall be placed near the test samples, one as
near as possible to the nozzles and the other as far away as possible from
the nozzles. The mist shall be such that, for each 80 cm2of horizontal
collecting area, an average of between 1·0 and 2·0 ml of solution per hour
is collected ineach collector whenmeasured over at least 16 hours.
5.2. The nozzle or nozzles shall be directed or baffled in such a manner that the
spray does not strike directly onto the test samples.1977L0541 — EN — 29.06.1987 — 005.001 — 50
▼B
ANNEX XIV
CHRONOLOGICALORDEROFTESTS
Corresponding
Directive provi-
sions
ItemsTestSamples
Belt or restraint
system NoStrap No
123451234567891 0 1 1
2.2, 2.3.2,
2.4.1.1, 2.5.1.1Inspection of belt or restraint
system x
2.4.2.1, 2.4.2.2 Inspection of buckle xxxxx
2.4.2.6, 2.4.2.7,
2.7.6.1, 2.7.6.5Buckle strength test
x
2.4.3.2, 2.7.6.1 Strength test on adjusting device
(and where necessary on retrac-
tors) x
2.4.4, 2.7.6.2 Strength test of attachments (and
where necessary of retractors) x
2.4.2.4, 2.7.6.3 Low-temperature test onbuckle x x
2.4.1.4, 2.7.6.4 Low-temperature impact test on
rigid parts x x
2.4.3.3, 2.7.6.6 Ease of adjustment x
Conditioning/testing of belt or
restraint system before dynamic
test:
2.4.2.3, 2.6.1.2 — durability of buckle x x
2.4.1.2, 2.7.2 — corrosionresistan ce of rigid
parts x x
— conditioning of retractors
2.4.5.1.1,
2.4.5.2.1,
2.4.5.2.2,
2.4.5.2.3,
2.7.7.2— locking threshold
xx
2.4.5.1.2,
2.4.5.2.4,
2.7.7.4— retracting force
xx
2.4.5.1.3,
2.4.5.2.5,
2.7.7.1— durability
xx
2.4.5.1.3,
2.4.5.2.5, 2.7.2— corrosion
xx
2.4.5.1.3,
2.4.5.2.5,
2.7.7.3— dust
xx
2.4.5.1.2, 2.7.5 Testing of strap width x x
Strap strength test after:
2.5.2, 2.7.5,
2.7.3.1— room conditioning
xx
2.5.3, 2.7.5,
2.7.3.2— light conditioning
xx
2.5.3, 2.7.5,
2.7.3.3— low-temperature conditioning
xx
2.5.3, 2.7.5,
2.7.3.4— heat conditioning
xx
2.5.3, 2.7.5,
2.7.3.5— water conditioning
xx1977L0541 — EN — 29.06.1987 — 005.001 — 51
▼M2
▼M2
Corresponding
Directive provi-
sions
ItemsTestSamples
Belt or restraint
system NoStrap No
123451234567891 0 1 1
2.4.3.1, 2.7.4 Micro-slip test x x
2.6.2, 2.7.3.6 Abrasiontest x x
2.6.1, 2.7.8 Dynamic test x x
2.4.2.5, 2.4.2.7,
2.7.8, 2.7.9Buckle-opening test
xx
2.7.1.4 Retention of strap sample x1977L0541 — EN — 29.06.1987 — 005.001 — 52