EN 13871:2005

SLOVENSKI STANDARD
01-maj-2005
Strojna predelava hrane - Stroji za razkosavanje - Varnostne in higienske zahteve
Food processing machinery - Cubes cutting machinery - Safety and hygiene
requirements
Nahrungsmittelmaschinen - Würfelschneidemaschinen - Sicherheits- und
Hygieneanforderungen
Machines pour les produits alimentaires - Machines a couper en cubes - Prescriptions
relatives a la sécurité et a l'hygiene
Ta slovenski standard je istoveten z: EN 13871:2005
ICS:
67.260 Tovarne in oprema za Plants and equipment for the
živilsko industrijo food industry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 13871
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2005
ICS 67.260
English version
Food processing machinery - Cubes cutting machinery - Safety
and hygiene requirements
Machines pour les produits alimentaires - Machines à Nahrungsmittelmaschinen - Würfelschneidemaschinen -
couper en cubes - Prescriptions relatives à la sécurité et à Sicherheits- und Hygieneanforderungen
l'hygiéne
This European Standard was approved by CEN on 6 August 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13871:2005: E
worldwide for CEN national Members.

Contents Page
Foreword.5
Introduction .6
1 Scope .7
2 Normative references .11
3 Terms and definitions .12
4 List of significant hazards .15
4.1 General.15
4.2 Mechanical hazards.15
4.3 Electrical hazards .18
4.4 Hydraulic and pneumatic hazards .18
4.5 Hazard from loss of stability.18
4.6 Noise hazard.18
4.7 Hazards generated by neglecting ergonomic principles.19
4.8 Hazards caused by non-compliance with hygiene principles .19
5 Safety and hygiene requirements and/or protective measures.19
5.1 General.19
5.2 Mechanical hazards.19
5.3 Electrical hazards .33
5.4 Hydraulic and pneumatic hazards .35
5.5 Hazard from loss of stability.36
5.6 Noise reduction.36
5.7 Ergonomic requirements .36
5.8 Hygiene and cleaning.36
6 Verification of safety and hygiene requirements and/or protective measures .40
7 Information for use .41
7.1 Instruction handbook .41
7.2 Training of operators.42
7.3 Marking .42
Annex A (normative)  Noise test code for cubes cutting machines (grade 2).43
A.1 Determination of the emission sound pressure level.43
A.2 Installation and mounting conditions.43
A.3 Operating conditions.43
A.4 Measurement.43
A.5 Information to be recorded .43
A.6 Information to be reported.44
A.7 Declaration and verification of the noise emission values .44
Annex B (normative)  Design principles to ensure the cleanability of cubes cutting machines .45
B.1 Terms and definitions .45
B.2 Materials of construction .46
B.3 Design .46
Annex C (normative)  Common hazards for food processing machines and reduction
requirements applicable to cubes cutting machines.50
C.1 Cutting hazards.50
C.2 Risks from cleaning.50
C.3 External influences on electrical equipment .50
C.4 Restoration of energy supply after an interruption; unexpected start-up.50
C.5 Hazards from neglecting use of PPE.51
C.6 Hazards of materials being processed.51
C.7 Hazards of slip and trip.51
Annex ZA (informative)  Relationship between this document and the Essential Requirements of
EU Directive 98/37/EC .52
Bibliography.53

Figures
Figure 1 — Cubes cutting machine type with forward feed plunger, lattice, sickle blade, feed intake
hopper and loading device.8
Figure 2 — Cubes cutting machine type with forward feed plunger, lattice and sickle blade and
loading by hand.9
Figure 3 — Cubes cutting machine type with various blades, conveying unit and feed conveyor.9
Figure 4 — Details of feed intake chamber.10
Figure 5 — Cubes cutting machine type with multi-segment blade and feed conveyor .10
Figure 6 — Cubes cutting machine type with multi-segment blade and centrifugal force feeding.11
Figure 7 — Danger zones on cubes cutting machine with forward feed plunger, lattice, sickle
blade, feed intake hopper and loading device .16
Figure 8 — Danger zones on cubes cutting machine with feed intake chamber/magazine and loading
by hand.16
Figure 9 — Danger zones on cubes cutting machine with conveying unit and feed conveyor.17
Figure 10 — Danger zones on cubes cutting machine with multi-segment blade and feed conveyor .17
Figure 11 — Danger zones on cubes cutting machine with multi-segment blade and loading by
means of centrifugal force .18
Figure 12 — Safety dimensions on cubes cutting machine: Guard.20
Figure 13 — Safety measures on cutting chamber door in conjunction with container .22
Figure 14 — Safety measures on cutting chamber door without container .22
Figure 15 — Safety measure on cutting chamber door in conjunction with transport trolley, safety
dimensions .23
Figure 16 — Safety dimensions on cubes cutting machine with a loading device.28
Figure 17 — Safety dimensions on feed, discharge opening on cubes cutting machine with a mast-
type loading device for feed heights over 2 500 mm.29
Figure 18 — Cubes cutting machine with feed conveyor .30
Figure 19 — ON / OFF switch with hood.35
Figure 20 — Hygiene areas on cubes cutting machine.37
Figure 21 — Hygiene areas on cubes cutting machine . 37
Figure 22 — Hygiene areas on cubes cutting machine . 38
Figure B.1 — Smooth surfaces - food area. 45
Figure B.2 — Angles and radii in food area . 46
Figure B.3 — Angle in food area . 47
Figure B.4 — Adjoining surfaces in food area. 47
Figure B.5 — Admissible joining elements - head profiles . 49
Figure B.6 — Dimensional examples. 49

Foreword
This document (EN 13871:2005) has been prepared by Technical Committee CEN/TC 153 “Food processing
machinery – Safety and hygiene specifications”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2005, and conflicting national standards shall be
withdrawn at the latest by September 2005.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Cyprus,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
Introduction
This document is a type C standard as stated in EN ISO 12100-1.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this document.
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.
1 Scope
This document covers cube cutting machines and accessories.
1.1 This document specifies requirements for the design and manufacture of cubes cutting machines (see
Figures 1 to 6 and 12 to 18).
The machines covered by this document are used to size reduce fresh meat, meat products and products of
the same kind by cutting in a cutting unit.
This document deals with all significant hazards, hazardous situations and events relevant to machines,
appliances and machinery, when they are used as intended and under the conditions foreseen by the
manufacturer (see clause 4).
This document deals with the hazards which can arise during commissioning, operation, maintenance and de-
commissioning of the machine.
This document is not applicable to cubes cutting machines which are manufactured before the date of
publication of this document by CEN.
1.2 This document covers the following types of cubes cutting machines:
 Cubes cutting machines with a forward feed plunger, a lattice and a sickle blade with loading by hand
(see Figure 2)
 Cubes cutting machines with a forward feed plunger, a lattice, a sickle blade, a feed intake hopper and a
loading device (see Figure 1)
 Cubes cutting machines with a rotating cutting tool, a multi-segment blade and a feed conveyor (see
Figures 3 and 5)
 Cubes cutting machines with a rotating cutting tool and centrifugal force loading (see Figure 6)
1.3 Machine construction
Cubes cutting machines are constructed of a machine frame, a feed intake chamber/magazine, a forward feed
plunger or nip roller, a lattice or a rotating cutting tool, a sickle or multi-segment blade, an associated drive
and electrical, hydraulic and pneumatic components, depending on machine type.
Cubes cutting machines in the scope of this document may be equipped with:
 a lid over the feed intake chamber/magazine;
 a transfer car for the sickle blade/multi-segment blade, cutting blade and lattice;
 a loading device;
 a feed conveyor.
Key
1 Loading device 5 Cutting chamber door/protective hood
2 Feed intake channel/magazine 6 Sickle blade/multi-segment blade
3 Frame 7 Lattice
4 Feed intake hopper
Figure 1 — Cubes cutting machine type with forward feed plunger, lattice, sickle blade, feed intake
hopper and loading device
Key
1 Feed intake trough 5 Cutting
2 Sickle blade/multi-segment blade chamber
3 Cutting chamber door/protective hood 6 Step
4 Lattice 7 Interlocked step
Figure 2 — Cubes cutting machine type with forward feed plunger, lattice and sickle blade and loading
by hand
Key
1 Feed conveyor
2 Cutting chamber door
3 Sickle blade/multi-segment blade
4 Container
Figure 3 — Cubes cutting machine type with various blades, conveying unit and feed conveyor
Key
1 Closure gate
2 Forward feed plunger
3 Feed intake chamber/magazine
Figure 4 — Details of feed intake chamber

Key
1 Nip roller 4 Stripper comb
2 Feed conveyor 5 Cut product
3 Rotating cutting tool 6 Multi-segment blade
Figure 5 — Cubes cutting machine type with multi-segment blade and feed conveyor
Key
1 Nip roller 4 Cutting blade
2 Rotating cutting tool 5 Multi-segment blade
3 Stripper comb 6 Cut product
Figure 6 — Cubes cutting machine type with multi-segment blade and centrifugal force feeding
1.4 Intended use
The intended use (as defined in EN ISO 12100-1:2003, 3.12) of cubes cutting machines as dealt with in this
document is described in 1.1.
The product to be cut is fed manually or by the loading device/feed conveyor into the feed intake chamber.
The product is fed to the cutting unit by the forward feed plunger and/or by the nip roller or by centrifugal force
and size reduced.
Although it should be advised against, the document, taking into account practice, deals with the hazards due
to cleaning with pressurised water.
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.
EN 294:1992, Safety of machinery — Safety distances to prevent danger zones being reached by the upper
limbs.
EN 349:1993, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body.
EN 614-1:1995, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general
principles.
EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed
and movable guards.
EN 954-1:1996, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design.
EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and components —
Hydraulics.
EN 983:1996, Safety of machinery — Safety requirements for fluid power systems and components —
Pneumatics.
EN 1005-1:2001, Safety of machinery — Human physical performance — Part 1: Terms and definitions.
EN 1005-2:2003, Safety of machinery — Human physical performance — Part 2: Manual handling of
machinery and parts of machinery.
EN 1005-3:2002, Safety of machinery — Human physical performance — Part 3: Recommended force limits
for machine operation.
EN 1037:1995, Safety of machinery — Prevention of unexpected start-up.
EN 1050:1996, Safety of machinery — Principles for risk assessment.
EN 1088:1995, Safety of machinery — Interlocking devices associated with guards —Principles for design
and selection.
EN 1672-2:1997, Food processing machinery — Basic concepts — Part 2: Hygiene requirements.
EN 60204-1:1997, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
(IEC 60204-1:1997).
EN 60529:1991, Degrees of protection provided by enclosures (IP-Code) (IEC 60529:1989).
EN 61496-1:2004, Safety of machinery — Electro-sensitive protective equipment — Part 1: General
requirements and tests (IEC 61496-1:2004, modified).
EN ISO 3744:1995, Acoustics — Determination of sound power levels of noise sources using sound
pressure — Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994).
EN ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and
equipment (ISO 4871:1996).
EN ISO 11201:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Engineering method in an
essentially free field over a reflecting plane (ISO 11201:1995).
EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995).
EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology (ISO 12100-1:2003).
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:
Technical principles and specifications (ISO 12100-2:2003).
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003, and the following
apply.
3.1
stripper comb
comb-shaped rake within the rotating cutting tool for wiping off the product
3.2
nip roller
shaft with teeth and passes for transporting of product
3.3
working platform
accessible standing area
3.4
step
standing area for operating the machine
3.5
container
unit for holding processed product
3.6
loading device
lifting and/or tilting device for raising and tilting transport trolleys or containers
3.7
construction height
height of hopper edge, measured from the floor
3.8
lid
movable unit with safety function on the feed intake chamber
3.9
feed intake channel
chamber for holding the meat or product of the same kind to be processed
3.10
feed intake chamber/ magazine
chamber between feed forward feed plunger and lattice
3.11
feed intake trough/ feed intake hopper
container for receiving product to be processed
3.12
locking device
device for fixing the transport trolley or container in the load bearing device
3.13
transport trolley
wheel-mounted device for holding product to be processed
3.14
lattice
cutting tool with blades arranged in parallel
3.15
design dimension
sum of dimensions measured from the floor (standing area), for steps, intermediate steps or ladders are
provided, from the standing area to the feed intake hopper edge and to the first danger point in the feed intake
hopper
3.16
load bearing device
device for holding transport trolleys/vats
3.17
mast-type loading device
loading device with a fixed post
3.18
frame
basic construction for carrying the machine body including legs
3.19
product to be cut
meat or products of the same kind to be processed
3.20
cutting blade
blade-shaped stationary cutting tool
3.21
cutting chamber
part of the housing for holding the lattice and sickle blade
3.22
cutting chamber door
interlocked door to the cutting chamber
3.23
protective hood/ protective grid
protective device for preventing access to the danger point at the lattice and sickle blade over the discharge
opening
3.24
restrictor plate
fixed non-detachable or interlocked movable/ detachable device above the feed intake chamber/magazine
3.25
hinged arm
movable part of the lifting and tilting device
3.26
sickle blade/ multi-segment blade
rotating cutting tool
3.27
transport car
wheel-mounted unit for holding the cutting unit
3.28
closure gate
movable closure plate with safety function over the feed intake chamber/magazine
3.29
forward feed plunger/ nip roller
plunger, conveying device to the cutting chamber for product to be processed
3.30
feed conveyor
conveyor belt for supplying the machine with product to be cut
4 List of significant hazards
4.1 General
This clause and annex C contain the hazards and hazardous situations which may arise during operation of
cubes cutting machines as far as they are dealt with in this document, identified by a risk assessment
significant for this type of machinery and which require action identified to eliminate or reduce risk.
Before using this document it is important to carry out a risk assessment of the cubes cutting machines it has
the hazards identified in this clause.
4.2 Mechanical hazards
 Zone 1
Feed intake chamber (magazine) with forward feed plunger.
Feed intake hopper with closure gate.
Feed conveyor.
Nip roller.
Entanglement, shearing or severing hazard to fingers or hand (see Figures 7 to 11).
 Zone 2
Rotating cutting tool and lattice.
Entanglement, shearing or severing hazard to fingers, hand or forearm (see Figures 7 and 9 to 11).
 Zone 3
Rotating sickle blade behind the cutting chamber door and multi-segment blade at discharge.
Severing hazard to fingers (see Figures 7, 10, 11).
 Zone 4
Stillstanding blades
Cutting hazard to fingers and hand during mounting and removal (see Figures 7, 10, 11).
 Zone 5
Loading device.
Entanglement, shearing or drawing-in hazard to fingers when machine topples over, when transport
trolleys/containers/vats fall off (see Figure 7).
 Zone 6
Drive of moving machine components.
Drawing-in, crushing, severing hazard to fingers or hand (see Figures 7 to 11).

Key
1 Zone 1 4 Zone 4
2 Zone 2 5 Zone 5
3 Zone 3 6 Zone 6
Figure 7 — Danger zones on cubes cutting machine with forward feed plunger, lattice, sickle blade,
feed intake hopper and loading device

Key
1 Zone 1
6 Zone 6
Figure 8 — Danger zones on cubes cutting machine with feed intake chamber/magazine and loading
by hand
Key
1 Zone 1 4 Zone 4
2 Zone 2 6 Zone 6
3 Zone 3
Figure 9 — Danger zones on cubes cutting machine with conveying unit and feed conveyor

Key
1 Zone 1 4 Zone 2
2 Zone 2 6 Zone 6
Figure 10 — Danger zones on cubes cutting machine with multi-segment blade and feed conveyor
Key
1 Zone 1 6 Zone 6
2 Zone 2
3 Zone 2
Figure 11 — Danger zones on cubes cutting machine with multi-segment blade and loading by means
of centrifugal force
4.3 Electrical hazards
4.3.1 Direct or indirect electrical contact with live components
Hazard from electrical impact on the body.
4.3.2 Electrical components with insufficient safety protection
Hazard from mechanical impact on the body due to malfunction.
4.4 Hydraulic and pneumatic hazards
Hazard to operator as a result from hydraulic fluid.
Contamination of the product by hydraulic fluid.
Hazard of the body by mechanical injury due to malfunction.
4.5 Hazard from loss of stability
Impact or crushing hazard if machine topples over.
4.6 Noise hazard
Cubes cutting machines generate noise which can result in hearing damage, in accidents due to interference
with speech communication and interference with the perception of acoustic signals.
4.7 Hazards generated by neglecting ergonomic principles
 Unhealthy posture or excessive physical effort.
 Inadequate consideration of human anatomy in designing the machine.
Hazard of physical damage to the body.
4.8 Hazards caused by non-compliance with hygiene principles
 Microbial causes
Spoilage of foodstuff
Hazard to health of consumer/operator from food poisoning
 Chemical causes
Contamination of foodstuff from residues of cleaning and disinfecting agents
Hazard to health of consumer through internal acid burns
5 Safety and hygiene requirements and/or protective measures
5.1 General
Cubes cutting machines shall comply with the safety requirements and/or protective measures of this clause
and annex C of this document.
In addition, they shall be designed according to the principles of EN ISO 12100-1 and EN ISO 12100-2 for
hazards relevant but not significant, which are not dealt with by this document (e. g. sharp edges).
NOTE For hazards which are to be reduced by the application of a B-standard such as EN 294:1992, EN 614:1995,
EN 953:1997, EN 954-1:1996, EN 1050:1996, EN 1088:1995, EN 1672-2:1997, EN 60204-1:1997, EN ISO 4287:1998, the
manufacturer should carry out a risk assessment to establish the requirements of that standard which are to be applied.
This specific risk assessment is part of the general risk assessment of the machine.
Where the means of reducing the risk is by the physical arrangement or positioning of the machine the
manufacturer shall include in the Information for use a reference to the reduction means to be provided, and to
any limiting value of the requirement, and, if appropriate, to the means of verification.
Where the means of reducing the risk is by a safe system of work, the manufacturer shall include in the
Information for use details of the system and of the elements of training required by the operating personnel.
5.2 Mechanical hazards
Cubes cutting machines shall be designed and constructed in accordance with annex C and the conditions
mentioned below.
Unless otherwise stipulated in other sub-clauses, the interlocking systems of guards shall comply with 4.2.1 of
EN 1088:1995 (interlocking without guard locking) and the safety related components of the control system
shall comply with at least category 1 of EN 954-1.
The interlocking devices shall be incorporated in the machine housing and correspond to 5.7 of EN 1088:1995.
NOTE This requires:
 to fulfil hygienic requirements;
 to protect against mechanical damages;
 to protect against the effects of cleaning and disinfecting materials;
 to protect against the effects of cleaning fluids (water);
 to protect against tampering by simple methods.
In the instruction handbook, the manufacturer shall indicate the daily verification of the interlocking device.
5.2.1 Measures on Cubes cutting machines with a forward feed plunger, a lattice and sickle blade
and loading by hand
Zone 1 Feed intake chamber (magazine) with forward feed plunger, feed intake hopper with closure
gate, feed conveyor, nip roller
5.2.1.1 Access shall be prevented either by a movable guard (e. g. restrictor plate, lid), interlocked
according to 5.2 or shall be secured by a non-detachable restrictor plate or adequate safety distances
and design as described in 5.2.2.2.
Taking into account the specific technical constraints (high loading frequencies), the movable guard (lid) can
be designed as a control guard according to 3.22.6 of EN ISO 12100-1:2003.
5.2.1.2 Openings in the guard (e. g. restrictor plate, lid) may have a diameter D ≤≤≤≤ 52 mm.
The dimensions and arrangements of the guard shall be according to Figure 12. Fastening of the non-
detachable restrictor plate shall be according to EN 953:1997.

Key
Ü  > 40 mm Ü  > 40 mm
H > 40 mm H > 40 mm
1 1
D  < 52 mm D  < 52 mm
Q  = 40 mm L > 120 mm
L  = L – X
L  > 230 mm
Figure 12 — Safety dimensions on cubes cutting machine: Guard

Zone 2 Rotating cutting tool and lattice
5.2.1.3 Access to danger points on cutting tools and lattice shall be prevented by enclosing guards
in compliance with EN 953.
The enclosing guards shall be designed to prevent penetration by ejected parts as e. g. blades.
Movable enclosing guards over danger points shall be interlocked according to 5.2.
Zone 3 Rotating sickle blade behind cutting chamber door and multi-segment blade at discharge
5.2.1.4 Access shall be prevented at least by one of the following possibilities:
 cutting chamber door, without container (see Figure 14);
 combination of cutting chamber door and container (see Figure 13);
 combination of cutting chamber door and transport trolley (see Figure 15).
The cutting chamber door shall be interlocked according to 5.2.
5.2.1.5 If containers or transport trolleys or connecting machines or appliances are used for
preventing access, these shall be interlocked so, that the function of the machine is stopped, when
these elements are removed, or the danger points shall automatically be covered, when these
elements are removed.
Interlocking of the container is not required on the discharge side if (see Figure 14):
the distance from the floor to the lower edge of the sickle blade housing is not more than 320 mm
and
the safety distance between the lower edge of the sickle blade housing and the radius of rotation of the sickle
blade is at least 230 mm.
Upon opening the cutting chamber door by 20 mm, the blade shall come to a standstill 0,15 s
and
after removal of a container or discharge conveyor underneath the discharge opening, the cutting edge shall
come to a standstill within 0,15 s.
Hazardous after-run of tools shall be prevented by braking devices or other solutions with equivalent effect.
NOTE Braking devices shall become automatically effective upon switching off the drive and in the event of a voltage
failure and upon opening of the protective devices.
Dimensions in millimetres
Key
1 Lid 5 Cutting chamber door 1 Lid
2 Forward feed plunger 6 Protective hood 2 Forward feed plunge
3 Lattice 7 Container 3 Lattice
4 Sickle blade 8 Interlocking device/ 4 Sickle blade
Position switch
5 Cutting chamber door
Figure 13 — Safety measures on cutting chamber Figure 14 — Safety measures on cutting chamber
door in conjunction with container door without container
Dimensions in millimetres
Key
1 Feed intake hopper, movable 6 Working platform
2 Forward feed plunger 7 Door
3 Lattice 8 Protective hood
4 Sickle blade 9 Transport trolley
5 Position switch
L > 1 100 mm < 1 200 mm
H = height of standing area above ground
S = L + E > 2 250 mm
H = H + L
Figure 15 — Safety measure on cutting chamber door in conjunction with transport trolley, safety
dimensions
Zone 4 Stationary blades
5.2.1.6 The mounting between the sickle blade and the drive shall be positive. If the enclosing guard is
open, the sickle blade shall be prevented from any unintentional movement.
It shall be stated clearly in the instruction for use that ”Protective gloves against knife cuts shall be worn“ when
changing the cutting tools and when carrying out any work in the vicinity of the cutting tools.
Zone 6 Drive mechanism
5.2.1.7 Access to danger points at the drive mechanism shall be safeguarded by the provision of fixed or
interlocked movable guards according to 3.2 and 3.5 of EN 953:1997. If guards need to be opened for
changing the operating process or for cleaning purposes, they shall be interlocked.
The interlocking system shall be according to 5.2.
5.2.2 Cubes cutting machine with feed intake hopper and loading device
Zone 1 Feed intake hopper with closure gate
Access to the danger points at the closure gate shall be prevented. This shall be achieved e. g. by the
following measures:
Access is prevented by:
 the design (e. g. closed infeed hopper) including a closed loading device for products (e. g. screw
conveyor, pipeline with pump) (see 5.2.2.1.1) or
 the use of guards (e. g. a cover), according to EN 953:1997 (see 5.2.2.1.2) or
 the use of electrosensitive protective devices (e. g. light barrier), see EN ISO 12100-2:2003
(see 5.2.2.1.3.1) or
 the use of fixed guards (e. g. fence), see EN 953:1997 (see 5.2.2.1.3).
Access is made safe by:
 the use of adequate safety distances, design and additional measures (see 5.2.3.2.3).
5.2.2.1 Interlocking devices
5.2.2.1.1 Design with a closed infeed hopper
The infeed hopper and the loading device shall be completely enclosed or the openings shall comply with
Table 4 of EN 294:1992.
If other machines or machine parts are used for enclosing, the presence of these elements shall be detected
by interlocking.
The interlocking system of the separation point shall comply with 5.2.
The manufacturer shall specify in the instruction handbook that the lid shall not be walked on.
5.2.2.1.2 Design with a cover at the infeed hopper
A cover shall be provided at the infeed hopper. The cover shall be interlocked. The mixing shaft shall come to
a standstill within 2 s after the front edge of the guard has been raised 40 mm (opening distance).
The interlocking system of the movable cover shall comply with 5.2.
Openings in the cover shall comply with EN 294:1992, Table 4.
5.2.2.1.3 Design with safety distances and additional measures
On cubes cutting machines which cannot use an interlocked cover or a light barrier because they would be
interrupted by continuous working, the following measures are necessary:
5.2.2.1.3.1 Safety distances
The design dimension (see 3.15), measured from the floor (standing area) shall be S ≥ 2 250 mm. This is only
possible in connection with additional measures 5.2.2.1.3.2. There by the distance from floor to upper edge of
mechanical bar or light barrier shall be H ≥ 1 600 mm. The distance from the standing area, from steps, and
platforms up to the upper edge of the mechanical trip bar/light barrier shall be L ≥ 1 100 mm (see Figure 15).
5.2.2.1.3.2 Additional measures
With a height H ≥ 1 600 mm, means shall be provided (e. g. a mirror or a fill level indicator) for allowing a
verification of the product level in the hopper.
The outside walls shall be designed (e. g. vertical and smooth) to prevent the operator climbing on the
machine. This also applies to interlocked steps in their folded position.
a) Interlocked step
If danger points in the feed intake hopper can be reached from steps or platforms (design dimension below
2 250 mm). The steps or treads of platforms shall be foldable and interlocked for preventing the functioning of
the machine when they are in their usable position. The mixing shaft shall come to a standstill within 2 s after
the interlocking system has been actuated by moving the step into its usable position.
The interlocking system of the movable step shall comply with 5.2.
The standing area of steps shall have a width ≥ 500 mm and a length ≥ 400 mm and a toe rail of a height of
15 mm. If the standing area is < 500 mm above ground, an area of a width ≥ 400 mm and a length ≥ 350 mm
is sufficient. The standing area shall be of the non-slip type.
Platforms shall have an accessible area of a width B ≥ 500 mm. The length of the platform shall correspond to
the length of the hopper.
Platforms which are located ≥ 500 mm above ground shall be fitted with safety devices to prevent falls.
Intermediate steps, stairs or ladders and grab handles shall be provided if the step-up height to the step or to
the platform is < 500 mm. The standing areas and treads shall be sufficiently large and of the non-slip type
and arranged at identical distances from one another.
The standing area of the intermediate step shall have a width of ≥ 300 mm and a length of ≥ 200 mm. Treads
of ladders shall have a length of ≥ 500 mm and a width of ≥ 80 mm. A ladder shall be arranged at an angle of
< 70° to the horizontal.
b) Mechanical trip bar/light barrier or movable protective grid on mixing container edge, running
round all sides
At the hopper edge there shall be at all sides alternatively a mechanical trip bar, a light barrier or a protective
grid with trip function (see Figures 4 and 5). There by the design dimension from the standing area (floor or
fixed step or fixed platform) across the upper edge of the protection equipment at the hopper edge up to the
next hazard point in the hopper shall be ≥ 2 250 mm.
The interlocking of the mechanical trip bar or the movable protective grid shall comply with 5.2.
The design of the light barrier shall be in accordance with ESPE type 2 of EN 61496-1:2004.
5.2.2.2 Movably mounted feed intake hoppers shall be interlocked according to 5.2.
On powered movable guards (feed intake hopper, lid), closing is effected in two phases:
 rapid descent to a minimum distance of 200 mm from the closing edge (measured at the point of largest
distance from the protective device to the closing edge);
 from that point the closing speed shall not exceed 50 mm/s.
In the event of a drive failure (e. g. pipe or hose breakage), the guard shall be automatically locked in its
position or the movement of the guard shall be reduced to a non-hazardous speed.
Non-powered movable guards shall be prevented from slamming shut (e. g. counterweight, springs) if their
open position
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