SIST EN 13954:2006
(Main)Food processing machinery - Bread slicers - Safety and hygiene requirements
Food processing machinery - Bread slicers - Safety and hygiene requirements
1.1 This document specifies safety and hygiene requirements for the design and manufacture of bread slicing machines of type 1 and 2 as defined in Clause 3.
The intended use of these machines is to cut baked bread into slices.
This document deals with all significant hazards, hazardous situations and events relevant to bread slicers machines, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4).
This document covers requirements for the safe operation of the machine including: loading, cutting, unloading, cleaning, crumb removal and maintenance.
These machines can be manually or automatically operated.
1.2 The following machines are excluded from the scope of this document:
- experimental and testing machines under development by the manufacturer;
- frame cutter machines with multiple blades moving horizontally;
- domestic appliances and machines intended for use by the general public;
- machines with horizontal circular cutting systems;
- rectangular cutting machines for cutting or sawing of panel size products into small pieces.
The significant hazards covered by this document are described in Clause 4.
1.4 In writing this document, it has been assumed that the bread slicers falling within the scope are operated only by trained personnel and that the machines are not intended to be cleaned with water jet.
1.5 This document applies to bread slicing machines which are manufactured before the date of publication by CEN of this document.
Nahrungsmittelmaschinen - Brotschneidemaschinen - Sicherheits- und Hygieneanforderungen
1.1 Diese Europäische Norm spezifiziert Sicherheits- und Hygieneanforderungen für die Konstruktion und Herstellung von Brotschneidemaschinen des Typ 1 und 2, wie sie in Abschnitt 3 definiert sind.
Diese Maschinen sind dazu bestimmt, gebackenes Brot in Scheiben zu schneiden.
Diese Europäische Norm erfasst signifikante Gefährdungen, Gefährdungssituationen und Ereignisse in Verbindung mit Brotschneidemaschinen, wenn diese so genutzt werden, wie vorgesehen und unter den vom Hersteller vorhersehbaren Missbrauch bzw. Fehlbedienungen (siehe Abschnitt 4).
Diese Europäische Norm befasst sich mit den Anforderungen an die sichere Verwendung der Maschine inklusive Beschicken, Schneiden, Entladen, Reinigung (Entfernen der Krumen) und Instandhaltung.
Diese Maschinen können manuell oder automatisch betrieben werden.
1.2 Folgende Maschinen fallen nicht unter den Anwendungsbereich dieser Norm:
- Testanlage in der Entwicklung beim Hersteller;
- Gattermaschinen mit mehreren sich horizontal bewegenden Messern;
- Haushaltsgeräte oder Maschinen für Allgemeingebrauch;
- Maschinen mit horizontal wirkenden Schneidesystemen;
- Maschine für das Schneiden oder Sägen von Scheiben in kleine rechteckige Stücke.
Die von dieser Norm abgedeckten signifikanten Gefährdungen sind in Abschnitt 4 beschrieben.
1.3 Bei der Erstellung dieser Norm wurde davon ausgegangen, dass die betreffenden Brotschneidmaschinen nur von geschultem Personal bedient werden und nicht mit einem Wasserstrahl zu reinigen sind.
1.4 Diese Europäische Norm ist nicht für Maschinen anzuwenden, die vor dem Erscheinungsdatum dieser Europäischen Norm hergestellt wurden.
Machines pour les produits alimentaires - Machines a couper le pain - Prescriptions relatives a la sécurité et a l'hygiene
Stroji za predelavo hrane – Rezalniki kruha – Varnostne in higienske zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 13954:2006
01-marec-2006
Stroji za predelavo hrane – Rezalniki kruha – Varnostne in higienske zahteve
Food processing machinery - Bread slicers - Safety and hygiene requirements
Nahrungsmittelmaschinen - Brotschneidemaschinen - Sicherheits- und
Hygieneanforderungen
Machines pour les produits alimentaires - Machines a couper le pain - Prescriptions
relatives a la sécurité et a l'hygiene
Ta slovenski standard je istoveten z: EN 13954:2005
ICS:
67.260 Tovarne in oprema za Plants and equipment for the
živilsko industrijo food industry
SIST EN 13954:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 13954:2006
---------------------- Page: 2 ----------------------
SIST EN 13954:2006
EUROPEAN STANDARD
EN 13954
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 67.260
English Version
Food processing machinery - Bread slicers - Safety and hygiene
requirements
Machines pour les produits alimentaires - Machines à Nahrungsmittelmaschinen - Brotschneidemaschinen -
couper le pain - Prescriptions relatives à la sécurité et à Sicherheits- und Hygieneanforderunden
l'hygiène
This European Standard was approved by CEN on 8 August 2005.
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 13954:2005: E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Contents Page
Foreword .3
Introduction.4
1 Scope .5
2 Normative references .5
3 Terms, definitions and description.6
3.1 Terms and definitions.6
3.2 Description .7
4 List of significant hazards.10
4.1 General .10
4.2 Mechanical hazards .10
4.3 Electrical hazards.13
4.4 Lack of hygiene.13
4.5 Hazards generated by neglecting ergonomic principles .13
4.6 Hazards from cleaning and handling.13
4.7 Noise .14
5 Safety and hygiene requirements and/or protective measures.14
5.1 General .14
5.2 Mechanical hazards .14
5.3 Electrical hazards.19
5.4 Hygiene requirements .21
5.5 Hazards generated by neglecting ergonomic principles .22
5.6 Hazards from cleaning and handling.23
5.7 Noise reduction.23
6 Verification of safety and hygiene requirements and/or measures .23
7 Information for use .24
7.1 Instruction handbook .24
7.2 Marking .25
7.3 Noise declaration .25
Annex A (normative) Noise test code for bread slicers (Grade 2 of accuracy).26
Annex B (normative) Principles of design to ensure the cleanability of bread slicers .29
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC, amended by 98/79/EC.48
Bibliography.49
2
---------------------- Page: 4 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Foreword
This European Standard (EN 13954:2005) 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 April 2006, and conflicting national standards shall be withdrawn at the
latest by April 2006.
This European Standard 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.
This European Standard is complementary to EN 14655:2005 that is covering bread slicing machines with
crescent blade(s) (type 3).
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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.
3
---------------------- Page: 5 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Introduction
There are various types of bread slicing machines. They are divided mainly into the following types:
Type 1: Frame cutter machines with multiple blades moving vertically;
Type 2: Machines with rotary crescent (sickle) or circular blade fixed to a shaft with oscillating movement
and horizontal manual loading;
Type 3: Machines with crescent blade fixed to a shaft, with a rotating movement and vertical manual
loading;
Type 4: Machines with one or more rotating band blades.
This European Standard is a type C standard as stated in EN ISO 12100-1:2003.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this European Standard.
When provisions of this type C standard are different from those that 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.
4
---------------------- Page: 6 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
1 Scope
1.1 This European Standard specifies safety and hygiene requirements for the design and manufacture of
bread slicing machines of type 1 and 2 as defined in Clause 3.
The intended use of these machines is to cut baked bread into slices.
This European Standard deals with all significant hazards, hazardous situations and events relevant to bread
slicers machines, when they are used as intended and under conditions of misuse which are reasonably
foreseeable by the manufacturer (see Clause 4).
This European Standard covers requirements for the safe operation of the machine including: loading, cutting,
unloading, cleaning, crumb removal and maintenance.
These machines can be manually or automatically operated.
1.2 The following machines are excluded from the scope of this document:
experimental and testing machines under development by the manufacturer;
frame cutter machines with multiple blades moving horizontally;
domestic appliances and machines intended for use by the general public;
machines with horizontal circular cutting systems;
rectangular cutting machines for cutting or sawing of panel size products into small pieces.
The significant hazards covered by this document are described in Clause 4.
1.3 In drafting this European Standard, it has been assumed that the bread slicers falling within the scope
are operated only by trained personnel and that the machines are not intended to be cleaned with water jet.
1.4 This European Standard is not applicable to bread slicing machines which are manufactured before the
date of publication of this European Standard.
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, 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 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
5
---------------------- Page: 7 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
EN 1672-2:2005, 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 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,
auditory and tactile signals (IEC 61310-1:1995)
EN 61496-1:1997, Safety of machinery — Electro-sensitive protective equipment — Part 1: General
requirements and tests (IEC 61496-1:1997, 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 4287:1998, Geometrical product Specifications (GPS) — Surface texture: Profile method — Terms,
definitions and surface texture parameters (ISO 4287:1997)
EN ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment
(ISO 4871:1996)
EN ISO 11201, 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 11688-1:1997, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12001, Acoustics — Noise emitted by machinery and equipment — Rules for the drafting and
presentation of a noise test code (ISO 12001:1996)
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 (ISO 12100-2:2003)
3 Terms, definitions and description
3.1 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN ISO 12100-1:2003 and the
following apply.
3.1.1
type 1 machines
bread slicers with reciprocating multiple blades moving vertically
3.1.2
type 2 machines
machines with rotary crescent (sickle) or circular blade fixed to a shaft with oscillating or rotating movement
and horizontal manual loading
6
---------------------- Page: 8 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
3.2 Description
3.2.1 Type 1 machines
Type 1 bread slicers usually consist of a frame supporting the following main elements (see example in
Figure 1):
7
---------------------- Page: 9 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Figure 1.1 — type 1a Figure 1.2 — type 1b
Figure 1.3 — type 1c
Key
1 crumb tray;
2 discharge area or device;
3 cutting device: multiple blades which have reciprocating motion;
4 infeed area or device;
5 feed device (e.g. pusher, special conveyor belt), which pushes and guides the loaf of bread for the cutting
action;
6 drive mechanisms;
7 electrical controls.
Figure 1 — Example of a bread slicer of type 1
According to the way the bread is brought to the slicing tool, the following distinctions are made:
8
---------------------- Page: 10 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Type 1a "hand operated machines" (Figure 1.1): the loaf of bread is pushed by a manual pusher. The
machine is equipped with a lever which acts at the same time as a start/stop control device.
Type 1b "automatic machines" (Figure 1.2): the bread is pushed by a power operated mechanical pusher.
A control device allows to activate the blades and the pusher until the bread is totally cut and the pusher
has come back to the feeding position. Then the machine stops and the cycle is finished. The next loaf of
bread is placed manually in front of the pusher.
Type 1c "automatic machines with continuous feeding" (Figure 1.3): the machine is fed manually or
continuously and the loaves of bread are brought to the blades by (a) conveyor belt(s).
3.2.2 Type 2 machines
A type 2 bread slicing machine consists of a machine frame supporting the following main elements: (see
example in Figure 2):
Key
1 feed device in a feed trough;
2 blade housing;
3 rotary (sickle) crescent or circular blade;
4 discharge trough;
5 crumb tray
Figure 2 — Bread slicing machine of type 2 with discharge trough
The machine housing holds associated drives, electrical and/or hydraulic and pneumatic components,
depending on the machine type.
Type 2 bread slicing machines in the scope of this document may be equipped with
an in-feed conveyor belt,
a discharge conveyor belt, and
9
---------------------- Page: 11 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
an oiling mechanism for the blade.
The bread to be cut is laid upon the feed device and transported to the cutting chamber to be cut. The slices
are discharged into the discharge trough or onto a conveyor.
4 List of significant hazards
4.1 General
This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt with
in this document, identified by risk assessment as significant for this type of machinery and which require
action to eliminate or reduce the risk.
4.2 Mechanical hazards
4.2.1 The significant mechanical hazards for type 1 machines are:
cutting hazard;
drawing in hazard;
shearing hazard;
loss of stability.
The examples shown in Figure 3 illustrates 4 danger zones associated with these hazards:
Zone 1: Access to cutting side of blades through infeed area.
Hazards of cutting.
Zone 2: Access to cutting side of blades through discharge area.
Hazards of cutting.
Zone 3: Access to cutting side of blades and to other moving parts of the machine through the crumb
tray opening, when it is removed.
Hazards of shearing, drawing in, cutting.
Zone 4: Access to all moving parts (e.g. drive mechanisms) through other sides of the machine.
Hazards of shearing, drawing in.
10
---------------------- Page: 12 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Figure 3.a Figure 3.b
Figure 3.c
Key
1 Zone 1
2 Zone 2
3 Zone 3
4 Zone 4
Figure 3 — Danger zones of bread slicers of type 1
4.2.2 The significant mechanical hazards for type 2 machines are listed below:
crushing hazard;
shearing hazard;
severing hazard;
entanglement hazard;
cutting hazard;
drawing-in hazard;
11
---------------------- Page: 13 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
loss of stability.
The example shown in Figure 4 illustrates 8 danger zones associated with these hazards:
Zone 1: Movement of the feed device in feed trough.
Crushing or shearing and cutting or severing hazard to fingers or hand.
Zone 2: Rotating blade in cutting area, access from feed trough.
Entanglement, cutting or severing hazard to fingers or hand.
Zone 3: Rotating blade in cutting area, access via discharge trough.
Entanglement, cutting or severing hazard to fingers or hand.
Zone 4: Rotating blade in the blade housing.
Cutting or severing hazard to fingers or hand.
Breakage of blade or detachment of blade mounting.
Hazard caused by ejected parts.
Zone 5: Rotating blade, access via the crumb tray.
Entanglement, cutting or severing hazard to fingers or hand.
Zone 6: Drive mechanisms of blade and feed device/ bread holder.
Crushing, shearing or drawing-in hazard to fingers or hand.
Zone 7: Outlet conveyor belt.
Entanglement, drawing-in or crushing hazard to fingers or hand.
Zone 8: Unintentional or intentional closing of machine parts.
Crushing hazard to fingers or hand.
12
---------------------- Page: 14 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Key
1 Zone 1
2 Zone 2
3 Zone 3
4 Zone 4
5 Zone 5
6 Zone 6
7 Zone 7
8 Zone 8
Figure 4 — Danger zones on a bread slicing machine of type 2 with discharge trough and outlet
conveyor belt
4.3 Electrical hazards
Hazard of electric shock from direct or indirect contact with live components.
Hazard of external influences on electrical equipment (e.g. cleaning with water and dust generated by slicing
the bread).
4.4 Lack of hygiene
Lack of hygiene can create a risk to human health and unacceptable alteration of foodstuff e.g. contamination
by microbial growth or foreign materials.
4.5 Hazards generated by neglecting ergonomic principles
Risk of injury or chronic damage to the body resulting from harmful body postures during operation, cleaning
and maintenance.
4.6 Hazards from cleaning and handling
Cutting while cleaning, whereas the blades are stopped.
Cutting while removing the blade assembly.
13
---------------------- Page: 15 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
4.7 Noise
Bread slicers can generate airborne noise which can result in hearing damage and in accidents due to
interference with speech communication and due to interference with the perception of acoustic signals.
5 Safety and hygiene requirements and/or protective measures
5.1 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 EN ISO 12100-2 for hazards relevant but not
significant which are not dealt with by this document.
NOTE For hazards which are to be reduced by the application of the B level standard EN 294, EN 349, EN 614-1,
EN 953, EN 954-1, EN 1088, EN 60204-1, EN 61310-1, EN 61496-1 and EN ISO 12100, 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 installed 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 working the machinery, 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
5.2.1 Mechanical hazards for type 1 machine
5.2.1.1 General
Where interlocking guards are required, they shall be at least with interlocking devices without guard locking
and comply with 4.2.1, Clauses 5 and 6 of EN 1088:1995.
Safety related parts of the control system shall be not less than category 1 of EN 954-1:1996.
Guards shall comply with EN 953 and EN 294.
5.2.1.2 Zone 1: Infeed area
5.2.1.2.1 Type 1a machines (hand operated)
The slicing area shall be protected by the combination of the machine frame and the following:
either by the provision of an interlocked guard complying with EN 294:1992, Table 4;
or by a frame preventing from unintentional contact with the blades, generally as shown in Figure 5
having a minimum depth of 120 mm (distance from edge of frame to slicing blades).
14
---------------------- Page: 16 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Key
1 cutting side of slicing blades
2 frame
d distance from edge of frame to slicing blades
Figure 5 – Minimum distance
The operating lever shall command the start function of the blades. If the lever is released the machine shall
stop and the lever shall return to the rest position ("hold-to-run").
The design of the bread pusher and the comb shall prevent access to the blades at the end of the pusher’s
movement.
On machines where the frame supporting the blades moves relative to the machine frame, the crushing
hazard between the blade frame and the machine frame shall be avoided. To achieve this, the maximum
clearance between the blade frame and the machine frame, where accessible, shall be less than 4 mm.
5.2.1.2.2 Type 1b machines (automatic)
The slicing blades and in-feed device shall be protected by one of the following methods:
an interlocking guard, which prevents access to the cutting side of the blades and the infeed device;
or
a control guard, complying with 5.4.9 of EN 953:1997, which when closed prevents access to the cutting
side of the blades and the infeed device and initiates the operation of the blades and the in-feed device;
or
an active opto-electronic protective device (AOPD) of type 2 in accordance with EN 61496-1:1997,
included in a category 3 circuit as defined by EN 954-1:1996.
In all cases, the dimensions of any openings in the guard shall be in accordance with Table 4 of EN 294:1992.
Opening of the guard or actuation of the active opto-electronic protective device shall cause the machine to
stop in the shortest possible time, but in no case exceed 1 s.
5.2.1.2.3 Type 1c machines (automatic with continuous feeding)
The slicing blades and in-feed device shall be protected by an interlocking guard. The safety distance from the
edge of the bread in-feed opening to the nearest danger zone shall be greater than or equal to 850 mm. The
height of the opening of the tunnel shall be limited to 200 mm.
15
---------------------- Page: 17 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
An alternative solution consists in fitting active opto-electronic protective device (see EN 61496-1:1997)
included in a category 3 circuit as defined by EN 954-1:1996
Opening of the guard or actuation of the active opto-electronic protective device shall cause the machine to
stop in the shortest possible time, but in no case exceed 1 s.
5.2.1.3 Zone 2: Discharge area
On the discharge side, only the uncutting sides of the blades shall be exposed. To prevent access to the
cutting side of the blades, the gap between or around individual blades shall be less than 25 mm.
The crushing hazard between the blade frame and the machine frame shall be avoided. To achieve this, the
maximum clearance between the blade frame and the machine frame, where accessible, shall be less than
4 mm, or the clearance between the blade frame and the machine frame shall be in accordance with EN 349.
5.2.1.4 Zone 3: Crumb tray
Means shall be implemented to reduce risks to personnel after removal of the crumb tray.
For “automatic” (type 1b) and “automatic with continuous feeding” (type 1c) machines, access to the cutting
side of the blades and to other moving parts shall be prevented. This can be achieved by designing the inside
of the machine to comply with Table 4 of EN 294:1992. If not, the crumb tray shall be interlocked.
For “hand operated” machines (type 1a), if removal of the crumb tray allows access to the cutting side of the
slicing blades and to other moving parts, they shall either conform to the requirements of an automatic
machine or fit a warning sign (see examples in Figure 6) in accordance with EN 61310-1.
Figure 6 — Example of warning signs
5.2.1.5 Zone 4: Drive mechanisms
Access to drive mechanisms shall be prevented. This can be achieved by housing them within the machine
frame. Any opening in the machine frame shall have a fixed or interlocking guard.
5.2.2 Mechanical hazards for type 2 machines
5.2.2.1 Guards and interlocking devices
5.2.2.1.1 General
Guards shall comply with EN 953 and EN 294.
16
---------------------- Page: 18 ----------------------
SIST EN 13954:2006
EN 13954:2005 (E)
Interlocking devices shall comply with EN 1088.
Unless specified otherwise in specific clauses, safety related parts of the interlocking system associated with
interlocking devices of guards shall be, in accordance with EN 954-1, not less than:
category 3 for guards preventing from access to the rotating blade and
category 1 for other guards.
Under normal stopping conditions, the blade shall come to a standstill in such a position that the cutting edge
of the blade does not protrude into the cutting area.
5.2.2.1.2 Specific requirements for interlocking devices without guard locking, associated with
guards preventing from access to the blade
This solution shall only be used if after activation of the device the blade stops within the shortest stopping
time from the following: 0,5 s, or a half rotation for a rotating blade/a half cycle of oscillating blades. If
necessary for achieving these objectives a braking device shall be provided. Otherwise the interlocking device
shall be with guard locking in accordance with 5.2.2.1.3.
The interlocking device shall be activated after opening of the guard by more than 10 mm. The specified
stopping time shall also be achieved after actuation of the emergency stop, or in the event of a power failure.
Instruction for use shall recommend regular inspection and maintenance, and define the elements to be check
in order to maintain operating effectiveness of the braking device.
5.2.2.1.3 Specific requirements for interlocking devices with guard locking, associated with guards
preventing from access
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.