Ships and marine technology — Deck machinery — Multifunctional manipulator

This document specifies the classification, requirements, test methods and inspection rules, as well as marking, packaging, shipping and storage requirements for multifunctional manipulators for deck operations (hereinafter referred to as "multifunctional manipulators"). It is applicable to the design, manufacture and acceptance of double folding multifunctional manipulators for clamping and tidying the anchor chain and ropes in deck operations.

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Status
Published
Publication Date
25-Oct-2020
Current Stage
6060 - International Standard published
Start Date
26-Oct-2020
Completion Date
26-Oct-2020
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INTERNATIONAL ISO
STANDARD 24044
First edition
2020-10
Ships and marine technology —
Deck machinery — Multifunctional
manipulator
Reference number
ISO 24044:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 24044:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 24044:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

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

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

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

4 Classification ............................................................................................................................................................................................................ 2

4.1 Structural types ...................................................................................................................................................................................... 2

4.2 Product designation ........................................................................................................................................................................... 3

4.3 Appearance ................................................................................................................................................................................................ 3

4.4 Basic parameters ................................................................................................................................................................................... 3

5 Requirements .......................................................................................................................................................................................................... 4

5.1 Design and structure .......................................................................................................................................................................... 4

5.2 Material ......................................................................................................................................................................................................... 8

5.3 Performance .............................................................................................................................................................................................. 8

5.4 Appearance quality ............................................................................................................................................................................. 9

6 Test method ............................................................................................................................................................................................................10

6.1 No-load test .............................................................................................................................................................................................10

6.2 Rated load test ......................................................................................................................................................................................10

6.3 Over-load test ........................................................................................................................................................................................10

6.4 Safety protection inspection ....................................................................................................................................................10

6.5 Power supply fluctuation ............................................................................................................................................................11

6.6 Insulation resistance .......................................................................................................................................................................11

6.7 Inspection of degrees of protection provided by enclosure (only for electrical cabinet) ...11

6.8 Appearance quality ..........................................................................................................................................................................11

7 Marking, packaging, shipping and storage ............................................................................................................................11

7.1 Nameplate ................................................................................................................................................................................................11

7.2 Warning sign ..........................................................................................................................................................................................12

7.3 Packaging ..................................................................................................................................................................................................12

7.4 Transportation .....................................................................................................................................................................................12

7.5 Storage ........................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 24044:2020(E)
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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 4, Outfitting and deck machinery.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 24044:2020(E)
Ships and marine technology — Deck machinery —
Multifunctional manipulator
1 Scope

This document specifies the classification, requirements, test methods and inspection rules, as well

as marking, packaging, shipping and storage requirements for multifunctional manipulators for deck

operations (hereinafter referred to as “multifunctional manipulators”).

It is applicable to the design, manufacture and acceptance of double folding multifunctional

manipulators for clamping and tidying the anchor chain and ropes in deck operations.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 780, Packaging — Distribution packaging — Graphical symbols for handling and storage of packages

ISO 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary and symbols

ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design
IEC 60529, Degrees of Protection Provided By Enclosure (IP Code)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 3828 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
jib

second movable arm of the multifunctional manipulator used to lift and hook tension free ropes

3.2
multifunctional head

operating device of the multifunctional manipulator used to grasp, clamp and tidy the anchor chain

and ropes
3.3
multifunctional boom

second movable arm of the multifunctional manipulator used to connect the multifunctional head (3.2)

3.4
main boom

first movable arm of multifunctional manipulator used to connect the slewing tower body and the

second movable arm of the double folding boom
© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 24044:2020(E)
3.5
luffing

movement made by the main boom (3.4), jib (3.1) and multifunctional boom (3.3) of the multifunctional

manipulator in changing the range in a reach direction
3.6
safe working load
SWL

maximum static load (kN) that the multifunctional manipulator can hoist or the multifunctional head

(3.2) operates under design working conditions
3.7
travelling mechanism

mechanism of the travelling multifunctional manipulator used to complete the movement with load

along the guide rail, consisting of carrier, roller train, guide pulley set, travel driving unit, cable reel,

pay-out stand, rail clamping device, speed control valve, buffer, and lubrication line

4 Classification
4.1 Structural types

4.1.1 Multifunctional manipulators can be divided into fixed and travelling types, according to their

structure (installation) form.

4.1.2 Multifunctional manipulators can be divided into multifunctional boom only and combined

multifunctional boom and jib, according to their composition. See Figure 1 and Figure 2.

Key
1 jib 4 multifunctional head
2 multifunctional boom 5 slewing tower body
3 main boom 6 fixed base

Figure 1 — Fixed multifunctional manipulator with combined multifunctional boom and jib

2 © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 24044:2020(E)
Key
1 multifunctional boom 4 slewing tower body
2 main boom 5 travelling mechanism
3 multifunctional head
Figure 2 — Travelling multifunctional manipulator with multifunctional boom
4.2 Product designation

The multifunctional manipulator shall be designated as shown in the example in Figure 3.

EXAMPLE Designation of a multifunctional manipulator with lifting SWL of 30 kN and maximum working

radius of 12 m, hydraulic-driven, fixed type and double working booms: Multifunctional manipulator

HMF-3012-D
Figure 3 — Product designation example
4.3 Appearance

The colour of the multifunctional manipulator surface shall be uniform, and the outer surface and

the coating layer shall be free from scratching, peeling, cracks and rust. The safe working load (SWL)

designation shall be clearly visible to the operator.
4.4 Basic parameters

The basic parameters of the multifunctional manipulator shall conform to Table 1.

Table 1 — Basic parameters of multifunctional manipulators
Type HMF-2010-D HMF-3012-D HMR-3012-D HMR-3014-D
Lifting (kN) 20 30 30 30
SWL
Multifunctional
(kN) 20
head operation
NOTE φ is the diameter of chain or rope.
© ISO 2020 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO 24044:2020(E)
Table 1 (continued)
Type HMF-2010-D HMF-3012-D HMR-3012-D HMR-3014-D
Lifting speed (m/s) 0,46
Maximum working radius (m) 10,2 12,2 12,2 14
Minimum working radius (m) 2,6 2,5 2,5 3,4
Slewing angle (°) 360° full slewing
Main boom luffing (°) 0°to 60°
Jib luffing (°) 20°to 150°
Multifunctional boom luffing (°) 20°to 150°
Swinging luffing of the
multifunctional head along (°) 120°
the boom
Self swinging of the
(°) ±40°
multifunctional head
Self slewing luffing of
(°) 360° full slewing
multifunctional head
Size range for multifunctional
(mm) φ50 to φ120
head clamping anchor chain
Size range for multifunctional
(mm) φ50 to φ84
head clamping rope
NOTE φ is the diameter of chain or rope.
5 Requirements
5.1 Design and structure
5.1.1 Environmental conditions

The multifunctional manipulator shall be able to work normally in the following environment:

a) sea state: 4

NOTE According to Pierson - Moskowitz Sea Spectrum and Beaufort Force, sea state 4 means Beaufort

wind force 5, under which condition the significant wave is 6 ft., significant range of periods is 2,5~8,5 s,

average period is 5 s, and average length of vaces is 80 ft.
b) ambient temperature: –25 °C~45 °C
c) vibration and shock generated during the normal operation of the ship.
d) humidity greater than 95 % with oil mist, salt spray, and mildew.
5.1.2 Steel wire rope

The steel wire rope shall be non-rotating steel wire, and the nominal tensile strength of a single steel

wire shall be not less than 1 440 MPa and not greater than 2 200 MPa.
5.1.3 Hook

The hook shall be of rotating type and shall reach the lifting capability of lifting SWL in the design

sea state.
4 © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 24044:2020(E)
5.1.4 Pulley

5.1.4.1 There shall be a proper inclined angle, which is usually between 35° and 45°, at the pulley rope

groove side and the inclined angle at the pulley rope groove side in Level 4 sea state shall be taken as 40°.

5.1.5 Boom, slewing tower body, base and carrier structure

5.1.5.1 The main boom, jib, and multifunctional boom shall adopt boom structure form with box

shaped and variable section. The boom, slewing tower body, base and carrier shall be subjected to stress

relief treatment after welding.
5.1.5.2 The slewing tower body shall be subjected to watertight inspection.
5.1.6 Slewing mechanism

5.1.6.1 If there are special requirements for the slewing tower body to limit the slewing angle, the

mechanical and electric limits shall be specified.

5.1.6.2 The slewing angle measurement shall be measured using an encoder enclosed inside a

hydraulic/electrical adapter.

5.1.6.3 The slewing mechanism has two slewing hydraulic drive mechanisms which are respectively

arranged on both sides of the lower plane of the slewing tower body. The slewing hydraulic drive

mechanism is composed of a planetary speed reducer, a brake and a gear, and the brake is normally

closed. The slewing hydraulic drive mechanism shall leave 1,5 mm eccentricity with the mounting axis

to ensure that the slewing support meshes well with the slewing hydraulic drive mechanism gear and

compensates for wear during use.
5.1.7 Fixed base/travelling mechanism

5.1.7.1 The fixed base shall be of sufficient rigidity to prevent the system from shaking due to excessive

elastic deformation.

5.1.7.2 For roller trains of the travelling mechanism, the two roller trains mounted on the front and

rear ends of the lower portion of the carrier respectively shall be used, each roller train consisting of one

mounting shaft, four positive rollers, four return rollers and two swing frames, to accommodate to the

vertical plane motion and horizontal yaw of the ship. Travelling drive should adopt the pinion and rack

driving mode.
5.1.7.3 The cable l
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 24044
ISO/TC 8/SC 4 Secretariat: SAC
Voting begins on: Voting terminates on:
2020-03-16 2020-06-08
Ships and marine technology — Deck machinery —
Multifunctional manipulator
ICS: ISO ics
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.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 24044:2020(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 2020
---------------------- Page: 1 ----------------------
ISO/DIS 24044:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 24044:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

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

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

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

4 Classification ............................................................................................................................................................................................................ 2

4.1 Structural types ...................................................................................................................................................................................... 2

4.2 Product designation ........................................................................................................................................................................... 3

5 Requirements .......................................................................................................................................................................................................... 4

5.1 Design and structure .......................................................................................................................................................................... 4

5.2 Material ......................................................................................................................................................................................................... 8

5.3 Performance .............................................................................................................................................................................................. 8

5.4 Appearance quality ............................................................................................................................................................................. 9

6 Test method ............................................................................................................................................................................................................10

6.1 No-load test .............................................................................................................................................................................................10

6.2 Rated load test ......................................................................................................................................................................................10

6.3 Over-load test ........................................................................................................................................................................................10

6.4 Safety protection inspection ....................................................................................................................................................10

6.5 Power supply fluctuation ............................................................................................................................................................11

6.6 Insulation resistance .......................................................................................................................................................................11

6.7 Inspection of degrees of protection provided by enclosure (only for electrical cabinet) ...11

6.8 Appearance quality ..........................................................................................................................................................................11

7 Marking, packaging, shipping and storage ............................................................................................................................11

7.1 Nameplate ................................................................................................................................................................................................11

7.2 Warning sign ..........................................................................................................................................................................................12

7.3 Packaging ..................................................................................................................................................................................................12

7.4 Transportation .....................................................................................................................................................................................12

7.5 Storage ........................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 24044:2020(E)
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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 4, Outfitting and deck machinery.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 24044:2020(E)
Ships and marine technology — Deck machinery —
Multifunctional manipulator
1 Scope

This document specifies classifications, requirements, test methods, inspection rules, marking,

packaging, transportation and storage of the multifunctional manipulator for deck operation

(hereinafter referred to as “multifunctional manipulator”).

It is applicable to the design, manufacture and acceptance of the double folding multifunctional

manipulator for clamping and tidying the anchor chain and ropes in deck operation.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 780, Packaging — Distribution packaging — Graphical symbols for handling and storage of packages

ISO 3828, Shipbuilding and marine structures — Deck machinery — Vocabulary and symbols

IEC 60447:2004, Basic and Safety Principles for Man-Machine Interface Marks and Identifications —Actuating

Principles
IEC 60529, Degrees of Protection Provided By Enclosure (IP Code)

ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design
3 Terms and definitions

For the purpose of this document, the terms and definitions given in ISO 3828 and the following

shall apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
jib

second movable arm of the multifunctional manipulator used to lift and hook tension free ropes

3.2
multifunctional head

operating device of the multifunctional manipulator used to grasp, clamp and tidy the anchor chain

and ropes
3.3
multifunctional boom

second movable arm of the multifunctional manipulator used to connect the multifunctional head

© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/DIS 24044:2020(E)
3.4
main boom

first movable arm of multifunctional manipulator used to connect the slewing tower body and the

second movable arm of the double folding boom
3.5
luffing

movement made by the main boom, jib and multifunctional boom of the multifunctional manipulator in

changing the range in a reach direction
3.6
safe working load (SWL)

maximum static load (kN) that the multifunctional manipulator can hoist or the multifunctional head

operates under design working conditions
3.7
travelling mechanism

mechanism of the travelling multifunctional manipulator used to complete the movement with load

along the guide rail, consisting of carrier, roller train, guide pulley set, travel driving unit, cable reel,

pay-out stand, rail clamping device, speed control valve, buffer, lubrication line and other components

4 Classification
4.1 Structural types

4.1.1 The multifunctional manipulator can be divided into fixed and travelling types according to the

structure (installation) form.

4.1.2 The multifunctional manipulator can be divided into two types: multifunctional boom only and

the combination of multifunctional boom and jib according to compositions. See Figure 1 and Figure 2.

Key
1 jib 4 multifunctional head
2 multifunctional boom 5 slewing tower body
3 main boom 6 fixed base
Figure 1 — Fixed multifunctional manipulator with multifunctional boom and jib
2 © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/DIS 24044:2020(E)
Key
1 multifunctional boom 4 slewing tower body
2 main boom 5 travelling mechanism
3 multifunctional head
Figure 2 — Travelling multifunctional manipulator with multifunctional boom
4.2 Product designation
4.2.1 Designation
The multifunctional manipulator shall be designated as follows:
4.2.2 Designation example

Designation of a multifunctional manipulator with lifting SWL of 30 kN and maximum working radius

of 12 m, hydraulic-driven, fixed type and double working booms:
Multifunctional manipulator HMF-3012-D
4.2.3 Appearance

The color of the multifunctional manipulator surface shall be uniform, and the outer surface and the

coating layer shall be free from scratching, peeling, cracks and rust. The SWL logo shall be clearly

visible to the operator.
4.3 Basic parameters

The basic parameters of the multifunctional manipulator shall conform to Table 1.

© ISO 2020 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO/DIS 24044:2020(E)
Table 1 — Basic parameters of multifunctional manipulator
Type HMF-2010-D HMF-3012-D HMR-3012-D HMR-3014-D
Lifting (kN) 20 30 30 30
SWL
Multifunctional
(kN) 20
head operation
Lifting speed (m/s) 0.46
Maximum working radius (m) 10,2 12,2 12,2 14
Minimum working radius (m) 2,6 2,5 2,5 3,4
Slewing angle (°) 360° full slewing
Main boom luffing (°) 0°~ 60°
Jib luffing (°) 20°~ 150°
Multifunctional boom luffing (°) 20°~ 150°
Swinging luffing of the multifunc-
(°) 120°
tional head along the boom
Self swinging of the multifunctional
(°) ±40°
head
Self slewing luffing of multifunc-
(°) 360° full slewing
tional head
Size range for multifunctional head
(mm) φ50~φ120
clamping anchor chain
Size range for multifunctional head
(mm) φ50~φ84
clamping rope
5 Requirements
5.1 Design and structure
5.1.1 Environmental conditions

The multifunctional manipulator shall be able to work normally in the following environment:

a) sea state: Level 4
b) ambient temperature: -25 °C~45 °C
c) vibration and shock generated during the normal operation of the ship
d) humidity greater than 95 % with oil mist, salt spray, and mildew
5.1.2 Steel wire rope

The steel wire rope shall be non-rotating steel wire, and the nominal tensile strength of a single steel

wire shall be not less than 1 440 MPa and not greater than 2 200 MPa.
5.1.3 Hook

The hook shall be of rotating type and shall reach the lifting capability of lifting SWL in the design

sea state.
5.1.4 Pulley

5.1.4.1 There shall be a proper inclined angle , which is usually between 35° and 45°, at the pulley rope

groove side and the inclined angle at the pulley rope groove side in Level 4 sea state shall be taken as 40°.

4 © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/DIS 24044:2020(E)
5.1.5 Boom, slewing tower body, base and carrier structure

5.1.5.1 The main boom, jib, multifunctional boom, etc. shall adopt box shaped variable section boom

structure. The boom, slewing tower body, base and carrier shall be subjected to stress relief treatment

after welding.
5.1.5.2 The slewing tower body shall be subjected to watertight inspection.
5.1.6 Slewing mechanism

5.1.6.1 If there are special requirements for the slewing tower body to limit the slewing angle, the

mechanical and electric limits shall be set.

5.1.6.2 The slewing angle measurement shall be measured using an encoder enclosed inside a

hydraulic/electrical adapter.

5.1.6.3 The slewing mechanism has two slewing hydraulic drive mechanisms which are respectively

arranged on both sides of the lower plane of the slewing tower body. The slewing hydraulic drive

mechanism is composed of a planetary speed reducer, a brake and a gear, and the brake is normally

closed. The slewing hydraulic drive mechanism shall leave 1,5 mm eccentricity with the mounting axis

to ensure that the slewing support meshes well with the slewing hydraulic drive mechanism gear and

compensates for wear during use.
5.1.7 Fixed base/travelling mechanism

5.1.7.1 The fixed base shall be of sufficient rigidity to prevent the system from shaking due to excessive

elastic deformation.

5.1.7.2 For roller trains of the travelling mechanism, the two roller trains mounted on the front and

rear ends of the lower portion of the carrier respectively shall be used, each roller train consisting of one

mounting shaft, four positive rollers, four return rollers and two swing frames, to accommodate to the

vertical plane motion and horizontal yaw of the ship. Travelling drive should adopt the pinion and rack

driving mode.

5.1.7.3 The cable length of the cable reel on the travelling mechanism is one-half of the travelling

stroke of the travelling multifunctional manipu
...

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