SIST EN 12042:2006+A1:2010
(Main)Food processing machinery - Automatic dividers - Safety and hygiene requirements
Food processing machinery - Automatic dividers - Safety and hygiene requirements
This European Standard applies to the design and manufacture of automatic dividers whose function is based on the volumetric principle using one or more suction and/or pressing pistons. Dough dividers working in other ways are excluded from the scope of this European Standard. These automatic dividers are used in the food industry and shops (pastry-making, bakeries, confectionery, etc.) for dividing dough or pastry into portions to produce the required weight of dough piece. These machines can be fed by hand or automatically. This European Standard specifies all significant hazards, hazardous situations and events relevant to the installation, adjustment, operation, cleaning, maintenance, dismantling, disabling and scrapping of automatic dividers, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer. When drafting this European Standard, it has been assumed that the machines are not intended to be cleaned with water. The following machines are excluded: - experimental and testing machines, under development by the manufacturer; - weighting devices; - “knife and belt" dividers and other types of machines where the dividing mechanism is based on the functioning of a moving knife; - lifting and tilting machines or other separate feeding machines. A noise test code is included in Annex A to assist manufacturers to measure noise levels for the purpose of the noise emission declaration. A noise test code is included in Annex A to assist manufacturers to measure noise levels for the purpose of the noise emission declaration. This European Standard is not applicable to machines which are manufactured before the date of publication of this European Standard by CEN.
Nahrungsmittelmaschinen - Teigteilmaschinen - Sicherheits- und Hygieneanforderungen
1.1 Diese Europäische Norm gilt für die Gestaltung/Konstruktion und Herstellung von automatischen Teigteilmaschinen, deren Funktion auf dem volumetrischen Prinzip basiert, bei dem ein oder mehrere Saug- bzw. Druckkolben zum Einsatz kommen, Teigteiler, die auf andere Art arbeiten, sind vom Anwendungsbereich dieser Europäischen Norm ausgeschlossen.
Diese automatischen Teigteilmaschinen werden in der Nahrungsmittelindustrie und in Geschäften (Konditoreien, Bäckereien, Kohnfisserien usw.) für das Teilen von Teig oder Blätterteig in Portionen um das gewünschte Gewicht der Teigportion herzustellen. Diese Maschinen werden automatisch oder von Hand bestückt.
Diese Europäische Norm umfasst sämtliche signifikanten Gefährdungen, Gefährdungssituationen und Ereignisse in Bezug auf Installation, das Einrichten, die Bedienung, Reinigung und Wartung automatischer Teigteilmaschinen, die relevant für den bestimmungsgemäßen Gebrauch unter den vom Hersteller vorhersehbaren Bedingungen, sind (siehe Abschnitt 4).
Bei Verfassung dieser Europäschen Norm wurde davon ausgegangen, dass diese Maschinen nicht für eine Reinigung mit Wasser vorgesehen sind.
1.2 Die folgenden Maschinen sind ausgenommen:
Versuchs- und Prüfmaschinen die in der Entwicklung beim Hersteller sind;
Wägeeinrichtungen;
Messer- und Band-Teiler und andere Bauarten von Maschinen, bei denen der Teilmechanismus auf der Funktion eines sich bewegenden Messers basiert;
Hub und Kippeinrichtungen ) oder andere separate Zuführmechanismen.
1.3 Im Anhang A befinden sich ein Verfahren zur Geräuschmessung als Hilfestellung für den Hersteller zur Geräuschmessung zur Angabe der Geräuschemission.
1.4 Diese Europäische Norm gilt nicht für Maschinen, die vor dem Veröffentlichungsdatum dieser Europäischen Norm durch CEN, gebaut wurden.
Machines pour les produits alimentaires - Diviseuses automatiques - Prescriptions relatives à la sécurité et à l'hygiène
1.1 La présente Norme européenne s'applique à la conception et à la fabrication de diviseuses automatiques
dont le fonctionnement est basé sur le principe volumétrique utilisant un ou plusieurs pistons d'aspiration et/ou
de compression. Les diviseuses de pâte fonctionnant sur d'autres principes sont exclues du domaine d'application
de la présente Norme européenne.
Ces diviseuses automatiques sont utilisées dans l'industrie alimentaire et les commerces de l'alimentation
(pâtisseries, boulangeries, confiseries, etc.) pour diviser la pâte ou la pâtisserie afin de produire des pâtons d’un poids
déterminé. Ces machines peuvent être alimentées à la main ou automatiquement.
!La présente Norme européenne spécifie tous les phénomènes dangereux, situations et événements dangereux
significatifs relatifs à l’installation, au réglage, au fonctionnement, au nettoyage, à la maintenance, au démontage,
à la mise hors service et à la mise au rebut des diviseuses automatiques lorsqu’elles sont utilisées normalement et
dans des conditions de mauvaise utilisation raisonnablement prévisibles par le fabricant (voir Article 4)."
À la rédaction de la présente Norme européenne, il a été présumé que le nettoyage des machines à l'eau n'est
pas prévu.
1.2 Les machines suivantes sont exclues du domaine d'application :
- les machines expérimentales et d'essais en cours de mise au point par le fabricant ;
- les dispositifs de pesée ;
- les diviseuses «à couteau et à bande» et autres types de machine où le mécanisme diviseur est basé
sur le fonctionnement d'un couteau mobile ;
- les élévateurs/basculeurs 1) ou autres machines à alimentation séparée.
1.3 Un code d’essai acoustique est inclus dans l’Annexe A pour aider les fabricants à mesurer les niveaux de bruit
en vue d’une déclaration d'émission sonore.
1.4 La présente Norme européenne ne s'applique pas aux machines qui sont fabriquées avant la date
de publication de la présente Norme européenne par le CEN.
Stroji za predelavo hrane - Avtomatski delilniki testa - Varnostne in higienske zahteve (vključno z dopolnilom A1)
Ta evropski standard velja za načrtovanje in proizvodnjo avtomatskih delilnikov testa, katerih funkcija je osnovana na volumetričnem principu, ki uporabljajo eden ali več sesal in/ali bate. Delilniki testa, ki delujejo drugače, so izvzeti iz obsega tega evropskega standarda. Te avtomatski delilniki testa so uporabljeni v prehrambeni industriji in trgovinah (izdelava peciv, pekarne, sladkornih izdelkov, itd.) za deljenje testa ali peciva v porcije za zagotovitev zahtevane teže kosa testa. Te stroje se lahko polni ročno ali avtomatsko. Ta evropski standard določa vse velike nevarnosti, nevarne situacije in dogodke, pomembne za postavitev, prilagoditev, delovanje, čiščenje, vzdrževanje, razstavljanje, izklapljanje in uničenje avtomatskih delilnikov testa, kadar so uporabljeni kot je predvideno in pod pogoji napačne uporabe, ki jih razumno predvidi proizvajalec. Med pripravo osnutka tega evropskega standarda je bilo predvideno, da stroji niso namenjeni za čiščenje z vodo. Izvzeti so naslednji stroji: - eksperimentalni in preskusni stroji, v postopku razvijanja z strani proizvajalca; - naprave za tehtanje; - »nož in trak« delilniki in druge vrste strojev, kjer je delilni mehanizem osnovan na delovanju premičnega noža; - stroji za dvigovanje in nagibanje ali druge ločene naprave za polnjenje. Preskusna koda hrupa je vključena v dodatku A za pomoč proizvajalcem pri meritvah nivoja hrupa za namene deklaracije o emisijah hrupa. Preskusna koda hrupa je vključena v dodatku A za pomoč proizvajalcem pri meritvah nivoja hrupa za namene deklaracije o emisijah hrupa. Ta evropski standard ne velja za stroje, ki so proizvedeni pred datumom, ko je CEN objavil ta evropski standard.
General Information
Relations
Standards Content (Sample)
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
SIST EN 12042:2006+A1:2010
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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
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
EN 12042:2005+A1:2010 (E) 2 Contents Page Foreword . 4Introduction . 51Scope . 62Normative references . 63Terms, definitions and description . 83.1Terms and definitions . 83.2Description . 84List of significant hazards . 94.1General . 94.2Mechanical hazards . 94.3Electrical hazards . 104.4Hazards generated by noise . 104.5Hazards resulting from dust inhalation . 104.6Hygiene . 114.7Hazards generated by neglecting ergonomic principles . 114.8Hazards specific to divider oil . 114.9Pneumatic and hydraulic equipment . 115!!!!Safety and hygiene requirements and/or protective measures"""" . 115.1General . 115.2Mechanical hazards . 115.3Electrical hazards . 185.4Noise reduction . 195.5Protection against dust emission . 195.6Protection against spilling oil . 195.7Hygiene requirements . 195.8Hazards generated by neglecting ergonomic principles . 205.9Pneumatic and hydraulic equipment . 216!!!!Verification of safety and hygiene requirements and/or protective measures"""" . 217Information for use . 227.1Signals and warning . 227.2Instruction handbook . 237.3Marking . 24Annex A (normative)
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
EN 12042:2005+A1:2010 (E) 3 Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 48Bibliography . 49SIST EN 12042:2006+A1:2010
EN 12042:2005+A1:2010 (E) 4 Foreword !This document (EN 12042:2005+A1:2010) has been prepared by Technical Committee CEN/TC 153 “Machinery intended for use with foodstuffs and feed”, 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 March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1, approved by CEN on 2010-08-12. This document supersedes EN 12042:2005. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". !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, 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. SIST EN 12042:2006+A1:2010
EN 12042:2005+A1:2010 (E) 5 Introduction This European Standard is a type C standard as stated in !EN ISO 12100". 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. SIST EN 12042:2006+A1:2010
EN 12042:2005+A1:2010 (E) 6 1 Scope 1.1 This European Standard applies to the design and manufacture of automatic dividers whose function is based on the volumetric principle using one or more suction and/or pressing pistons. Dough dividers working in other ways are excluded from the scope of this European Standard. These automatic dividers are used in the food industry and shops (pastry-making, bakeries, confectionery, etc.) for dividing dough or pastry into portions to produce the required weight of dough piece. These machines can be fed by hand or automatically. !This European Standard specifies all significant hazards, hazardous situations and events relevant to the installation, adjustment, operation, cleaning, maintenance, dismantling, disabling and scrapping of automatic dividers, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4)." When drafting this European Standard, it has been assumed that the machines are not intended to be cleaned with water. 1.2 The following machines are excluded: experimental and testing machines, under development by the manufacturer; weighting devices; “knife and belt" dividers and other types of machines where the dividing mechanism is based on the functioning of a moving knife; lifting and tilting machines1) or other separate feeding machines. 1.3 A noise test code is included in Annex A to assist manufacturers to measure noise levels for the purpose of the noise emission declaration. 1.4 This European Standard is not applicable to machines which are manufactured before the date of publication of this European Standard by CEN. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. 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 distance to prevent danger zones being reached by the upper limbs !EN 614-1:2006+A1:2009", Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 619, Continuous handling equipment and systems — Safety and EMC requirements for equipment for mechanical handling of unit loads !EN 953:1997+A1:2009", Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards
1) See EN 13288. SIST EN 12042:2006+A1:2010
EN 12042:2005+A1:2010 (E) 7 EN 954-1:1996, Safety of machinery — Safety related parts of control systems — Part 1: General principles for design EN 982, Safety of machinery — Safety requirements for fluid power systems and their components — Hydraulics EN 983, Safety of machinery — Safety requirements for fluid power systems and their components — Pneumatics EN 1037, Safety of machinery — Prevention of unexpected start-up !EN 1088:1995+A2:2008", Safety of machinery — Interlocking devices associated with guards — Principles for design and selection !EN 1672-2:2005+A1:2009", Food processing machinery — Basic concepts — Part 2: Hygiene requirements EN 1760-2, Safety of machinery — Pressure sensitive protective devices — Part 2: General principles for the design and testing of pressure sensitive edges and pressure sensitive bars !EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified)" EN 60529, 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 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
EN 12042:2005+A1:2010 (E) 8 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 apply. 3.2 Description The dividers in the scope consist of the elements listed below (covered optional equipment is also included) (see Figure 1): 1) loading hopper; 2) feeding assistance device (optional, see Figure 2); 3) volumetric dividing device which can be of one of the following types: drum and piston; sliding drawer; and the operating mechanisms; 4) flour duster at the delivery of pieces of dough (optional); 5) one or more conveyor belts designed to discharge pieces of dough; 6) one or more drive units to operate the dividing device and the discharge devices; 7) sundry devices, e. g. to set the weight of the portions; 8) control system.
Figure 1 — Main parts of an automatic divider SIST EN 12042:2006+A1:2010
EN 12042:2005+A1:2010 (E) 9
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
EN 12042:2005+A1:2010 (E) 10 Zone 4: drive mechanisms and other moving internal components: hazards of crushing, impact, shearing, drawing-in; Zone 5: Flour duster: hazard of entanglement.
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
EN 12042:2005+A1:2010 (E) 11 4.6 Hygiene Lack of hygiene can create a risk to human health and unacceptable modification of foodstuff e.g. contamination by microbial growth or foreign materials. 4.7 Hazards generated by neglecting ergonomic principles During operation, cleaning and maintenance there is a risk of injury or chronic damage to the body resulting from awkward body postures. 4.8 Hazards specific to divider oil A slipping hazard results if divider oil is allowed to spill onto the floor around the divider. 4.9 Pneumatic and hydraulic equipment Pneumatic and hydraulic equipment presents crushing, shearing, ejection of parts, explosion and injection of fluids hazards. Stored energy in pneumatic or hydraulic systems may cause mechanisms to move unexpectedly even when power supplies are disconnected. In addition hydraulic oil and pneumatic lubricating oil present a potential fire hazard and can contaminate agri-foodstuffs. ! 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 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
EN 12042:2005+A1:2010 (E) 12 5.2.2 Zone 1: Access to the dividing zone or feeding device zone if any, via the hopper 5.2.2.1 General When a hoist or lifting and tilting machine is used to feed the hopper of the dough divider, the hazardous area, at the interface between the tilting machine and the automatic dividers, shall be safeguarded. This can be achieved by enclosure of the hoist or lifting and tilting machine and divider hopper by a combination of fixed and interlocked guards whose dimensions comply with Table 2 or Table 4 of EN 294:1992, by pressure sensitive bars around the top of the hopper, or by a combination of both.
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
EN 12042:2005+A1:2010 (E) 13 with EN 61310-1. 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. b) by the provision of an interlocked extension feed chute or swan neck (see Figure 5) which is dimensioned and positioned in accordance with EN 294:1992, Table 2. This solution shall also take account of ergonomics aspects.
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
EN 12042:2005+A1:2010 (E) 14 arm are interrupting the light rays, the device is capable of distinguishing between both. This means that dough can be added without interrupting the machine functioning. 5.2.2.4 Additional measures – Interlocked step or platforms If danger points in the feed intake hopper can be reached from steps or platforms with S as defined in Figure 6 less than 2 250 mm, the steps or treads of platforms shall be interlocked. The interlock shall stop the machine and make it impossible to start if the steps or platforms are in the usable position or if a person is stepping on the platform. When the automatic dividers are running empty, the mechanism shall come to a standstill within 4 s after the interlocking system has been actuated.
!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
EN 12042:2005+A1:2010 (E) 15
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 mo
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.