ISO/DIS 13031.2

Earth-moving machinery -- Quick couplers -- Safety

Engins de terrassement -- Attache rapide -- Sécurité

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 13031.2
ISO/TC 127/SC 2 Secretariat: ANSI
Voting begins on: Voting terminates on:
2014-03-31 2014-05-31
Earth-moving machinery — Quick couplers — Safety
Engins de terrassement — Attache rapide — Sécurité
ICS: 53.100
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 13031.2:2014(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2014
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ISO/DIS 13031.2:2014(E)
Copyright notice

This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as

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ii © ISO 2014 – All rights reserved
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ISO/DIS 13031.2
ontents Page

1 Scope ...................................................................................................................................................... 1

2 Normative references ............................................................................................................................ 1

3 Terms and definitions ........................................................................................................................... 1

4 Safety requirements and/or protective measures .............................................................................. 7

4.1 Quick coupler ......................................................................................................................................... 7

4.1.1 General ................................................................................................................................................... 7

4.1.2 Engagement system .............................................................................................................................. 8

4.1.3 Locking system ..................................................................................................................................... 8

4.2 Object handling ..................................................................................................................................... 9

4.3 Controls .................................................................................................................................................. 9

4.3.1 General requirements ........................................................................................................................... 9

4.3.2 Separate control .................................................................................................................................. 10

4.3.3 Integrated control(s) ............................................................................................................................ 10

4.4 Electrical circuits ................................................................................................................................. 11

4.4.1 Over-current protective devices ........................................................................................................ 11

4.5 Pressurized systems ........................................................................................................................... 11

5 Information for use ................................................................................................................................ 1

5.1 Safety labels ........................................................................................................................................... 1

5.2 Instructions and information for use ................................................................................................... 1

5.2.1 Operator's manual ................................................................................................................................. 1

5.2.2 Installation manual ................................................................................................................................ 1

5.3 Quick coupler marking .......................................................................................................................... 2

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ISO/DIS 13031.2
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 13031 was prepared by Technical Committee ISO/TC 127, Earth-moving machinery, Subcommittee SC 2,

Safety, ergonomics and general requirements.

This second/third/... edition cancels and replaces the first/second/... edition (), [clause(s) / subclause(s) /

table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.

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ISO/DIS 13031.2
Introduction

The development of this International Standard was initiated in response to accidents which had occurred in

various countries in connection with the use of some types of quick couplers. It became clear that some of the

risks related to quick coupler operation could be overcome by design measures and that therefore there was a

benefit in obtaining international consensus on those measures. Amongst other measures the standard

specifies design criteria related to ensuring that an attachment is located in the right position on the quick

coupler and that the engagement system is fully activated. While preparing the standard it was considered to

what extent the state of the art allowed the further reduction of risks related to engagement procedures not

being fully completed. In particular, it was considered carefully whether the use of sensors and associated

control systems could be normatively required in order to ensure that those procedures were correctly

completed. It was determined that the current state of the art did not allow such a mandatory requirement to

be made. However, due to the continuing development of technology this possibility will be reviewed by ISO

TC 127 periodically so that a revision to this standard can be initiated at the appropriate time. Nothing in this

standard should be taken as discouraging the development of new technologies and new technical measures

to reduce or remove risk.
This document is a type C standard as defined in ISO 12100.

The machinery concerned and the extent to which hazards, hazardous situations and events are covered are

indicated in the scope of this standard.

When provisions of this type C standard are different from those which are stated in type A or B standards, the

provisions of this type C standard take precedence over the provisions of the other standards, for machines

that have been designed and built according to the provisions of this type C standard.

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DRAFT INTERNATIONAL STANDARD ISO/DIS 13031.2
Earth-moving machinery — Quick couplers — Safety
1 Scope

This International Standard specifies safety requirements for quick couplers used on earth-moving machinery

as defined in ISO 6165.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 12100 Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 6165, Earth-moving machinery — Basic types: Identification and terms and definitions.

ISO 6750, Earth-moving machinery — Operator's manual — Content and format

ISO 9244, Earth-moving machinery — Safety signs and hazard pictorials — General principles.

ISO 20474-1:2008, Earth-moving machinery — Safety — General requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
quick coupler

device mounted on an earth-moving machine to allow the quick interchange of attachments

NOTE Quick couplers are also commonly referred to under many different names, including but not limited to, “quick

hitch” or “attachment bracket”. For the purpose of this standard only the term “quick coupler" is used.

3.1.1
powered quick coupler

quick coupler where the movement of any part of the engagement and locking system is actuated by a power

source (e.g. a hydraulic system or an electric motor)
3.1.2
manual quick coupler

quick coupler where the movement of the engagement and locking systems is actuated by human effort at the

quick coupler itself
NOTE Locking can be automatic as part of the manual process of engagement.
3.1.3
mixed quick coupler

quick coupler where engagement and locking is carried out from the operator's station but disengagement is

carried out by human effort at the quick coupler itself
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ISO/DIS 13031.2
3.2
engagement system

mechanical system of the quick coupler which engages with the attachment and retains the attachment in its

working position
3.2.1
form-locked engagement system

engagement system which retains the attachment in the normal working position by a system of at least two

components that engage each other perpendicular to the working forces such that the working forces do not

tend to cause disengagement
EXAMPLE Pin in shear (see Figure 1).
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ISO/DIS 13031.2
Key
1 engagement system in engaged position
2 engagement system in disengaged position
Figure 1 — Example of form-locked engagement system
3.2.2
force-locked engagement system

engagement system whereby continued engagement is dependent on the continuous application of the

engagement force as the working forces act in a direction to cause disengagement
See Figure 2 for an example.
Key
1 engagement system
2 engagement force device
Figure 2 — Example of force-locked engagement system
3.2.3
friction system

engagement system whereby engagement is dependent on a force generated only by friction

NOTE 1 Friction systems are not permitted [see 4.1.2 paragraph 2]
NOTE 2 See Figure 3 for an example.
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ISO/DIS 13031.2
Key
1 engagement system
2 engagement force device
Figure 3 — Example of friction engagement system
3.2.4
wedge-type engagement system

engagement system of at least two interconnecting parts which engage with one another in a wedge action

whereby the combination of the wedge angle and the friction coefficient counteract the tendency of the

working forces to cause disengagement
NOTE See Figures 4 and 5.
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ISO/DIS 13031.2
Key
1 engagement system (wedge)
2 engagement force device
Figure 4 — Example of wedge-type engagement system
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ISO/DIS 13031.2
Key
1 engagement system (wedge)
2 engagement force device
Figure 5 — Example of wedge-type engagement system on a loader
3.3 Forces
3.3.1
working forces

forces created by the working operations of the machine and attachments that act upon the quick coupler

during intended use and reasonably foreseeable misuse
3.3.2
engagement force

force that moves the engagement system to the engaged position and, if the design requires, retains it in that

position
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ISO/DIS 13031.2

NOTE Engagement force is used for retention if the working force or additional forces (e.g. gravity) create a force

tending to disengage the attachment (i.e. force-locked engagement systems, wedge-type engagement systems)

3.4
locking system

system that ensures that the attachment is retained in its working position if the engagement force is lost,

reduced, or removed
3.5 Controls
3.5.1
separate control

control solely dedicated to the quick coupler which is not integrated into, or mounted on to, any other machine

control, and does not have any other function

NOTE a switch mounted on a control joystick is not considered to be a separate control

3.5.2
integrated control

control used to engage and/or disengage the coupler which is integrated into, or mounted onto, any other

machine control, or a control which also has another function
EXAMPLE Switch on a joystick control.
3.5.3
initiating control
control that enables a disengagement control to function
3.5.4
disengagement control
control which connects the disengagement actuator to its power supply

NOTE In a system with integrated controls the disengagement control is enabled by the initiating control

3.5.5
hold-to-run

type of control device which initiates and maintains quick coupler functions only as long as the manual control

is actuated [SOURCE ISO 12100:2010, 3.28.3 (adapted)]
4 Safety requirements and/or protective measures
4.1 Quick coupler
4.1.1 General

Machinery shall comply with the safety requirements and/or protective measures of this clause. In addition,

the machine shall be designed according to the principles of ISO 12100 for relevant but not significant hazards

which are not dealt with by this document.

The quick coupler shall have an engagement system and a locking system that meet the requirements of

4.1.2 and 4.1.3 respectively.
NOTE The process of coupling co
...