EN 12042:2005+A1:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Nahrungsmittelmaschinen - Teigteilmaschinen - Sicherheits- und HygieneanforderungenMachines pour les produits alimentaires - Diviseuses automatiques - Prescriptions relatives à la sécurité et à l'hygièneFood processing machinery - Automatic dividers - Safety and hygiene requirements67.260Tovarne in oprema za živilsko industrijoPlants and equipment for the food industryICS:Ta slovenski standard je istoveten z:EN 12042:2005+A1:2010SIST EN 12042:2006+A1:2010en,fr,de01-december-2010SIST EN 12042:2006+A1:2010SLOVENSKI
STANDARDSIST EN 12042:20061DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12042:2005+A1
September 2010 ICS 67.260 Supersedes EN 12042:2005English Version
Food processing machinery - Automatic dividers - Safety and hygiene requirements
Machines pour les produits alimentaires - Diviseuses automatiques - Prescriptions relatives à la sécurité et à l'hygiène
Nahrungsmittelmaschinen - Teigteilmaschinen - Sicherheits- und Hygieneanforderungen This European Standard was approved by CEN on 1st August 2005 and includes Amendment 1 approved by CEN on 12 August 2010.
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 CEN Management Centre 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 CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12042:2005+A1:2010: ESIST EN 12042:2006+A1:2010

Noise test code for automatic dividers – Grade 2 of accuracy . 26A.1Definitions . 26A.2Installation and mounting conditions . 26A.3Operating conditions . 26A.4Measurements . 26A.5Emission sound pressure level determination . 26A.6Sound power level determination . 27A.7Measurement uncertainties . 27A.8Information to be recorded . 27A.9Information to be reported . 27A.10Declaration and verification of noise emission values . 28Annex B (normative)
Principles of design to ensure the cleanability of automatic dividers . 29B.1Definitions . 29B.2Materials of construction . 29B.3Design . 30SIST EN 12042:2006+A1:2010

!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 48Bibliography . 49SIST EN 12042:2006+A1:2010

1) See EN 13288. SIST EN 12042:2006+A1:2010

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 ISO 3743-1, Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields — Part 1: Comparison method for hard-walled test rooms (ISO 3743-1:1994) 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, 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 the 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, 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) !EN ISO 13849-1:2008, Safety of machinery — Safety related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006)" SIST EN 12042:2006+A1:2010

Figure 1 — Main parts of an automatic divider SIST EN 12042:2006+A1:2010

Figure 2 — Examples of feeding assistance devices 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 European Standard, identified by risk assessment as significant for this type of machinery and which require action to eliminate or reduce the risk. Before using this European Standard it is important to carry out a risk assessment of the automatic dividers to check that they have the hazards identified in this clause. 4.2 Mechanical hazards The significant mechanical hazards are:  crushing;  shearing;  cutting;  drawing-in;  abrasion;  loss of stability. Figure 3 illustrates five danger zones associated with mechanical hazards:  Zone 1: dividing zone or feeding device zone if any, access via hopper: hazards of shearing, crushing, cutting;  Zone 2: Access to dividing mechanisms and other moving parts via discharge opening/discharge belt: hazards of entanglement and crushing; NOTE In principle, there is no significant hazard at the discharge side of a drum and piston type dividing mechanism.  Zone 3: discharge belt, space between belt and roller: hazard of crushing; SIST EN 12042:2006+A1:2010

Key 1 zone 1 2 zone 2 3 zone 3 4 zone 4 5 zone 5 Figure 3 — Danger zones of an automatic divider 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). 4.4 Hazards generated by noise Automatic dividers may generate airborne noise which can result in hearing damage, in accidents due to interference with speech communication and in interference with the perception of acoustic signals. 4.5 Hazards resulting from dust inhalation Use of flour dusters exposes operators to dust including flour and ingredients which may be harmful to their health, causing rhinitis (running noses), watering eyes and possibly occupational asthma. SIST EN 12042:2006+A1:2010

In addition, the machine shall be designed according to the principles of EN ISO 12100-2 for relevant but not significant hazards, which are not dealt with by this document. When fixed guards, or parts of the machine acting as such, are not permanently fixed e.g. by welding, their fixing systems shall remain attached to the guards or to the machinery when the guards are removed." 5.2 Mechanical hazards 5.2.1 General Guards shall comply with !EN 953:1997+A1:2009". Where reference is made to interlocking devices throughout clause 5, they shall comply with !EN 953:1997+A1:2009" (guard interlocking without locking) and clauses 5 and 6 of !EN 1088:1995+A2:2008". Interlocking devices on hinged hoppers and similar equipment shall be activated before the opening between the movable and the fixed parts exceeds 25 mm. Where the interlocking mechanism has movable parts, e.g. position switches, these shall be protected from contamination by dough or dry ingredients, e.g. by mounting them within the machine body. Alternatively, magnetic switches may be used if total removal of any guard is required. !The safety related parts of the control systems shall meet at least category 1 of 6.2.2 of EN 954-1:1996 or present at least a performance level c defined in accordance with EN ISO 13849-1:2008." The outside walls of the machine shall be designed (e.g. vertical and smooth) to prevent the operator climbing on the machine. Folding interlocked steps, if fitted, shall either be designed so that they are always active or designed so that it is not be possible to climb on them in the folded position. SIST EN 12042:2006+A1:2010

In addition, warning signs (see Figure 4) shall be attached to the hopper, warning of the shearing hazards that exist within the hopper. For machines where the upper rim of the hopper is equal to or higher than 1,6 m, the following additional requirements also apply on machines where no interlocking steps or working platforms are provided (see 5.2.2.4):  means for observing of the dough from floor level shall be provided, for example one or more mirrors or transparent panels in the side of the hoppers;  facility to allow cleaning from floor level, for example an interlocked hinged hopper or removable hopper panels that comply with !EN 953:1997+A1:2009".
Figure 4 — Safety signs 5.2.2.2 Automatically fed machines Access via the hopper opening to the hazardous zone shall be prevented while the machine is in operation. The hazardous area shall be enclosed by fixed and/or interlocked guards whose dimensions comply with Table 4 of EN 294:1992. The principle of distance guarding shall only be used if the height of the protective structure in the sense of EN 294 is at least 3 m. Where an intermediate hopper is fitted this can form part of the guarding system. 5.2.2.3 Hand-fed machines The access to the danger zones in the feed intake hopper shall be restricted or prevented by one of the following methods: a) by the provision of an interlocked lid or guard (see 3.25.4 of EN ISO 12100-1:2003) which is dimensioned and positioned in accordance with Table 4 of EN 294:1992. Where the distance to the danger point is at least 850 mm, an aperture measuring no more than 180 mm x 180 mm is allowed in the lid provided, warning signs are fitted next to the aperture. The dimensions of the warning signs shall be in accordance SIST EN 12042:2006+A1:2010

The stopping time after functioning of the interlocking device shall be less than or equal to 4 s or the guard shall be interlocked with guard locking;
Key 1 danger zone a height of danger zone b height of protective structure c horizontal distance to danger zone Figure 5 — Example with an interlocking extension feed chute For cleaning reasons, the swan neck extension shall be hinged and interlocked. c) by fitting pressure sensitive trip-devices that comply with EN 1760-2 around the entire hopper edge and the safety distances shown in Figure 6; The design of the trip devices shall minimise the risk of dough preventing their operation.
The stopping time after the actuating of the trip device shall be less than or equal to 1 s. NOTE At present new solutions for the safeguarding of a hopper are under study. One of these is a light barrier with delayed switching action placed on top of the hopper. On the basis of the difference in time the dough and the operator's SIST EN 12042:2006+A1:2010

!The interlocking system of the movable step shall comply with 5.2.1 and the safety related parts of the control systems shall meet at least category 1 of 6.2.2 of EN 954-1:1996 or present at least a performance level c defined in accordance with EN ISO 13849-1:2008." 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 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. SIST EN 12042:2006+A1:2010

Key 1 sensitive trip-device 2 Interlocked step 3 danger zone H1 ≥ 1 100 mm H2 ≥ 1 600 mm D ≥ 550 mm A ≤ 50 mm S = H2+ E + D ≥ 2 250
where A = distance between the internal rim of the trip device and the top edge of the hopper D = minimum distance from the top edge of the hopper, interlocking extension or guard
to the danger point H2= minimum distance to the upper edge from the floor h = height of the step Figure 6 — Required safety distances with the use of a pressure sensitive trip-device around the hopper edge and an interlocked step If h ≥ 500 mm, one or more intermediate steps shall be used. 5.2.3 Zone 2: Access to the dividing mechanism and other moving parts via the discharge opening NOTE In principle, there is no significant hazard at the discharge side of a drum and piston type dividing mechanism. Access to the hazardous dividing mechanisms and other moving parts via the discharge opening shall be prevented by:  either a fixed guard with dimensions according to the EN 294:1992 Table 4; or  movable interlocking distance guard in accordance with Table 4 of EN 294:1992; or  movable interlocking distance guard in accordance with Table 1 and Figure 7. If the guard has openings, the distance between bars or mesh shall comply with EN 294:1992 Table 4. SIST EN 12042:2006+A1:2010

a)b)Key 1 Descending to the middle of the belt 2 Maximum width 300 mm Figure 7 — Tunnel 5.2.4 Zone 3: Discharge belt Protection shall be ensured by observing the safety clearance as well by means of distances set out in EN 294:1992 Table 4 or shall be safeguarded in accordance with EN 619. For example a guard such as the one marked 2 in Figure 8 shall be fitted to prevent access to the inrunning nip. SIST EN 12042:2006+A1:2010

Key 1 input or output device 2 guard of the inrunning nip 3 roller Figure 8 — Guard of the inrunning nip The distance between the returning part of the belt and fixed parts of the machine shall be less than or equal to 4 mm. If this is not possible, fixed or movable guards in accordance with !EN 953:1997+A1:2009" shall prevent access to the danger zone. 5.2.5 Zone 4: Drive mechanisms and other moving internal components Access to the drive mechanism and other moving internal components including the dividing mechanisms from other sides than the discharge opening of the machine shall be prevented. This may be achieved by use of fixed guards complying with !EN 953:1997+A1:2009" and where guards have to be removed daily or more regularly for cleaning or maintenance - movable interlocking guards. 5.2.6 Zone 5: Flour duster The flour containers shall be fitted with a fixed or interlocked guard with dimensions according to EN 294:1992, Table 4 , acting on the flour feed system. The aforementioned guard may be omitted if there are no risks due to the flour feed system (e. g. if the feed consists of a spindle with rubber spokes or notches, or if the flour is sprinkled by a vibrating device). 5.2.7 Loss of stability 5.2.7.1 General Machines shall be designed to be stable and shall comply with 5.2.7.2 and 5.2.7.3 as applicable. For machines designed to be fixed to the floor, the instruction handbook shall indicate the values of forces at the fixing points. 5.2.7.2 Free standing machines without castors shall be stable when tilted 10° from the horizontal plane, in the most unfavourable direction.
5.2.7.3 Free standing machines with castors shall have a locking device for example a brake on at least two castors (or sets of castors) and shall comply with the provisions of sub clause 5.2.7.2. 5.2.7.4 Machines with a step shall also pass the following test: The stability shall be maintained if an effort F of 1 000 N (for example a mass of 100 kg) is exerted on the external edge of the step as shown in Figure 9. In case of the size of the step allows for a presence of two persons the test effort shall be 2 000 N. SIST EN 12042:2006+A1:2010

Figure 9 — Test of stability for automatic dividers with a step 5.3 Electrical hazards 5.3.1 General Electrical equipment, for example switches, that may be exposed to water, e. g. during cleaning, they shall be protected to an appropriate IP rating according to EN 60529 and EN 60204-1. The electrical equipment shall comply with EN 60204-1, with the following precision. 5.3.2 Safety requirements related to electromagnetic phenomena
The machines shall have sufficient immunity to electromagnetic disturbances to enable them to operate safely as intended and not fail to danger when exposed to the levels and types of disturbances intended by the manufacturer. The manufacturer of the machines shall design, install and wire the equipment and sub-assemblies taking into account the recommendations of the suppliers of these sub-assemblies. ! 5.3.3 Protection against electric shock The electrical equipment shall comply with Clause 6 of EN 60204-1:2006. 5.3.4 Power circuits Devices for detection and interruption of over-current have to be applied to each live conductor in compliance with EN 60204-1:2006, 7.2.3. In case of single phase machines, no such device is required for the earthed neutral conductor. 5.3.5 Protection against earth faults in control circuits For machinery supplied from a single-phase conductor and an earthed neutral conductor, there is no requirement for double pole interruption of the control circuit. The single pole interruption shall be in the phase conductor (see 9.4.3.1 of EN 60204-1:2006). 5.3.6 Emergency stop No emergency stop is required for automatic dividers. In this case particular attention shall be given to the accessibility of the normal OFF switch from the operator position. SIST EN 12042:2006+A1:2010

EN 60529:1991)." 5.4 Noise reduction Automatic dividers shall be so designed and constructed that risks from airborne noise emission are reduced to the lowest level by particularly applying measures at source to control noise, see for example EN ISO 11688-1. The success of the applied noise reduction measures is assessed on the basis of the actual noise emission values (see Annex A) in relation to other machines of the same family. 5.5 Protection against dust emission Means shall be provided to prevent flour from spilling onto the floor, for example a collecting device for flour below the rear end of the outlet conveyor. If a flour duster is used to sprinkle special types of dough, one or more of the following shall be provided:  means which allow dosage as low as necessary, according to the kind and size of the dough piece;  means which allow dosage only for that time, when the dough piece is under the flour duster;  means to stop the flour duster if the machine stops;  means to ensure the stopping of a subsequent machine in a production line stops the flour duster if the duster is part of that line;  maximum height of 5 cm of the underside of the flour duster above the height of the largest dough pieces. 5.6 Protection against spilling oil The divider oil reservoir shall be constructed and positioned so that it can be filled easily, minimising the risk of spilling oil. The manufacturer shall provide means to collect divider oil, so that it does not spill on the floor e.g. catch trays. 5.7 Hygiene requirements 5.7.1 General Automatic dividers shall be designed and manufactured in accordance with !EN 1672-2:2005+A1:2009" and Annex B. The 3 zones mentioned in !EN 1672-2:2005+A1:2009" are defined as follows and shown in Figure 10. 5.7.2 Food area The food area is as follows:  inside surfaces of the hopper;  all dividing components;  portion discharge belt;  inside surface of flour duster, including the inside surface of the movable cover. SIST EN 12042:2006+A1:2010

Food area
Splash area
Non food area Figure 10 — Hygiene zones
5.8 Hazards generated by neglecting ergonomic principles For hand-fed machines the manufacturer shall pay particular attention to the ergonomic aspects of the loading of the dough and shall provide appropriate means and define procedures for facilitating the loading. For hand-fed machines where the upper rim of the feeding hopper is at a height of 1,6 m or more, and unless the risk assessment allows the conclusion that the alternative measures are sufficient, a working platform according to 5.2.2.4 shall be provided. Awkward body postures during maintenance and cleaning as well as filling and emptying the dividers or other operations, shall be avoided.
Unexpected start-up shall be prevented using the measures described in EN 1037 and a separate means of isolation shall be provided with for each type of energy. ! 6 Verification of safety and hygiene requirements and/or protective measures This clause contains the methods of testing for the presence and adequacy of the safety requirements stated in Clause 5.
Verification of the requirements can be made by means of inspection, calculation or testing. These shall be applied to a machine in a fully commissioned condition but partial dismantling may be necessary for the purpose of some checks. Such partial dismantling shall not invalidate the result of verification. Methods of verification are given in Table 2. SIST EN 12042:2006+A1:2010

Annex B (type verification). 5.8 Hazards generated by neglecting ergonomic principles By measurement of the forces, by inspection of the visibility of the indications, buttons, etc. (type verification). 5.9 Pneumatic and hydraulic equipment By inspection and testing (type and individual verification).
" 7 Information for use 7.1 Signals and warning The following waning signs shall be placed on the automatic dividers:
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