Stacker Cranes for Pallets SLK · 2018. 7. 11. · Stacker Cranes for Pallets Single-mast pallet stacker cranes (MT0) Designed to handle non-operator automated systems in free-standing

Stacker Cranes for Pallets

Stacker cranes are machines designed

for the automated storage of materials.

They travel along the aisles of the

warehouse, where they enter, position

and extract materials.

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Stacker cranes for pallets

Single-mast MT0Single-mast MT’sTwin-mast MTB0Twin-mast MTB’s

Mechanical components

ColumnsBottom guide base Top guide baseLifting action Mobile lifting frame or cradle Extraction systems:

Single deepDouble deepTriple deepShuttle carRoller conveyor

Electrical components

Onboard conveyorTrilateral forksElectric boxesData transmission

Aisle equipment

Bottom railTop railPosition measurement systems:

Crossbeam sensorsPallet pull/push controlsLaser telemeterAbsolute encoders

Systems for changing aisle:Turning bendsTransfer bridge

Operational modes

Automated modeSemi-automated modeManual mode

Safety devices

Safety equipment on boardAisle safety equipmentWireless safety signal transmissionsystem

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Stacker cranes are machines designed forthe automated storage of materials bymeans of automated mechanicalmovements. Materials are entered andextracted in the same movement (this isknown as a combined cycle). Thisincreases the productivity of theinstallation at the same time as reducingthe resources required for it to function.

In order to move the loads in thewarehouse, the stacker cranes can carryout three types of movements:

� Longitudinal: on a rail along an aisle.� Vertical: up the column of the stacker

crane.� Transversal: or in depth, performed by

the extraction systems fitted to thecradle of the machine in order extract orposition a pallet.

The principal types of stacker cranes are:

� Single-mast (for pallet load weight upto 1,500 kg).

� Twin-mast (for pallet load weight up to1,000 kg).

STACKER CRANES FOR PALLETS�

The Mecalux stacker cranes are state-of-the-art machines with commandsoperated by vector-controlledfrequency variators with positioningcontrol by means of laser telemetersand intelligent control by PC or PLC.

The range of stacker cranes adaptseasily to the needs of each warehousein terms of load capacity, dimensions,building height and cycle times, andso is able to cover a huge range ofapplications.

All of these systems can be adapted tospecial working conditions such asfreezing temperatures (-30 ºC),extreme humidity or special featuresincluding the possibility of increasingstandard working speeds.

What is more, it has electronic energyrecovery devices, which account forconsiderable savings in monthlyenergy consumption.

Mecalux’s stacker craneshave demonstrated theirefficiency in sectors asdiverse as the foodindustry, the car industry,pharmaceuticals, spareparts, metallurgy,chemicals and publicadministration.

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Single-mast pallet stackercranes (MT0)Designed to handle non-operatorautomated systems in free-standingwarehouses using conventional shelvingwithout the need for upper guide rails. Itsmain advantages are:

CHARACTERISTICS15,000 mm

No

1,200 kg

1,300 x 1,100 x 2,300 mm

Trilateral electric forks

100 m/min

0.3 m/s2

38 m/min

0.3 m/s2

Transfer bridge without pit

Yes

Yes

Maximum height - single deep

Upper guide rail rail

Maximum weight over entire height

Max. load dimensions

Type of extractor

Max. drive speed (Vx)

Max. drive acceleration (ax)

Max. lifting speed (Vy)

Max. lifting acceleration (ay)

Aisle changing system

Europallets of 800 mm and 1,000 mm

GMA or closed CHEP pallets

� Load picking on three sides withbottom dimensions under 100 mmon the sides and 0 mm for frontpicking.

� Does not require upper guide rail,meaning it can be used in existingwarehouses without having toreinforce the shelving units.

� Eight-wheel running gear, makingaisle changes over the transfer bridgeeasy, without requiring a pit.

� Completely automatic operationthat connects to Easy WMS.


STACKER CRANES FOR PALLETS>>

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Column

Top guide base

Maintenance platform

Operator cabin

Lifting cradle

Gearmotor for lifting

On-board control panel

Gearmotor for traveling

Bottom guide base

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Basic components

Single-mast MT stacker cranesfor pallets The new MT line is lighter, faster, andmore energy efficient.

Designed to offer the greatest possiblelevels of functionality and efficiency, theirwide range enables the user to select ineach case the most suitable stacker cranein terms of available space and goods tobe handled.

The existence of a type of machine foreach warehouse height allows the cost ofthe installation to be trimmed to themaximum.

With stackers ranging from the MT-1model, ideal for simpler installations, upto the MT-6 which can reach a storageheight of 45 m, all commonplace needsare covered.

The table below details the technical limitsof the range of Mecalux’s single-maststacker cranes.

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CHARACTERISTICS MT-1 MT-2 MT-3

18,000 mm

15,500 mm

24,000 mm

22,000 mm

33,000 mm

27,000 mm


Maximum height - double deep

Telescopic fork - single deep

Telescopic fork - double/triple deep

Max. load admitted





Shuttle car

Side mounted cabin

Working temperature range


Pallet type

Energy recovery system

MT-5

40,000 mm

40,000 mm

Yes

Optional

1,500 kg (SF) 1,500 kg (SF) 1,500 kg (SF) 1,000 kg 1,000 kg 1,000 kg1,000 kg (DF) 1,000 kg (DF) 1,000 kg (DF)

220 m/min

0.45 m/s2

66 m/min

0.5 m/s2

Optional

Optional

From –30 ºC to +40 ºC

1,100 x 1,300 x 2,400 mm

Europallet of 800 mm and 1,000 mm in width (EN 13382)

Optional

45,000 mm

45,000 mm

MT-6MT-4

36,000 mm

33,000 mm

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Twin-mast stacker cranes(MTB0) Created for simple storage systems, thereare fewer features but it is just as safe,and has high capacity without the needfor a great deal of space. Twin-mastcranes is affordable and energy efficient.Its main advantages are:

� Minimum level of load pick-up witha connection to automated conveyors.

� Eight-wheel carriage, making aislechanges easy over the transfer bridgewithout requiring a pit.

� Total automation, even for incomingand outgoing operations, if additionalconveyors are placed at the headerline.

� Low energy consumption.

� Completely automatic operationconnecting to Easy WMS.

CHARACTERISTICS18,000 mm

Yes

1,500 kg

1,300 x 1,100 x 2,400 mm

Yes

Optional

Optional

Telescopic fork - double deep

120 m/min

0.3 m/s2

38 m/min

0.3 m/s2

Yes

Yes

Maximum height

Upper guide rail

Maximum weight over entire height




Picking systems via radio shuttle/rollerconveyor

Type of extractor





Europallets of 800 mm and 1,000mm

GMA pallets

Twin-mast MTB stacker cranesfor pallets Twin-mast stacker cranes have beendeveloped for circumstances requiringmore demanding features. They offerenhanced improved performance in termsof storage height, load capacity andworking speeds.

The lifting cradle operates between twocolumns allowing access to all levels, thusensuring that the installation is sturdy andstrong.

This class of stacker cranes also offers awide range of machines enabling optimaladaptation to height and weight factorsof the load. The range of twin-maststacker cranes of Mecalux can be seen inthe following table.

CHARACTERISTICS MTB-1 MTB-2 MTB-3 MTB-4

17,000 mm

12,000 mm

12,000 mm

–

22,000 mm

20,000 mm

27,000 mm

27,000 mm

35,000 mm

35,000 mm


Maximum height - double deep



Picking systems via radio-shuttle/rollerconveyor

Max. load admitted





Optional shuttle car

Optional maintenance elevator cabin

Working temperature range


Pallet type

Optional energy recovery system

MTB-5

40,000 mm

40,000 mm

45,000 mm

45,000 mm

MTB-6

Yes

Optional

Optional

1,500 kg

180 m/min

0.5 m/s2

66 m/min

0.8 m/s2

Yes

Yes

From –30 ºC to +40 ºC

1,300 x 1,100 x 2,400 mm

Europallet of 800 mm and 1,000 mm in width (EN 13382)

Yes

MTB-7


STACKER CRANES FOR PALLETS>>

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Columns

Top guide base

Maintenance platform

Operator cabin

Lifting cradle

Gearmotor for lifting

On-board control panel

Gearmotor for traveling

Bottom guide base

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Basic components

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The design of the stackercranes minimises the forcestransmitted to the structureon which they aresupported. In the long runthis prevents the rack andwarehouse structure frombeing damaged.Stacker cranes are made upof the followingcomponents: columns,guide base or bottom frame,top guide base, hoistingcontrol and the mobilehoisting frame or cradle.

ColumnsThe columns can be formed by structuraltubes or by box-girders. They aremanufactured from highly resistant steelsheets which have been specially shapedand welded together forming arectangular-shaped box-girder.

1. The box girder is reinforced inside bymeans of lattice ribbing fittedhorizontally and diagonally, giving thecolumn greater resistance to torsion andbending. The structure formed by thetwo columns and the two framesstrengthens the stacker crane, ensuringit is sturdy and stable when moving.

2. The columns come with vertical tracksbolted on both sides that guide a hoistingcradle. These tracks are ST 52 K-gradecalibrated rectangular sections which aremechanized to obtain a high degree ofprecision.

3. A plate of welded steel is bolted atthe base of the column to the bottomframe. These machine-cut steel platesare welded to both edges of thecolumn, and then bolted to the top andbottom guide bases.

4. Under the hoisting group platformthere is a completely enclosed andsecure control cabin, along with anelectrical control panel.

5. Maintenance tasks are accessed via theemergency ladder installed along thecolumn’s flank, which comes equippedwith a safety cable. All the equipmentcomplies with current safetyregulations.

The MTB line of twin-mast cranes can be installed with an independentelevator cabin to carry out maintenancetasks.


MECHANICAL COMPONENTS�

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Bottom guide base or frameThis structure in the form of a box is madeup of profiles and steel sheets weldedtogether, which are resistant to bendingand torsion thanks to the reinforcementribbing welded inside at regular intervals.

The drive wheel and free wheel headersare fastened to both ends of the bottomchassis with bolted and welded plates.The free wheel header allows the columnto be plumbed easily.

The drive wheel is fitted by heat on a shaftwhich is supported on a set of bearingslocated in these housings. The wheel isfitted or removed by dismounting thesystem of fixing clamps.

A conical gear reducer with hollow shaftsis fitted on these shafts. It is secured by atorque arm which is connected to an ACdrive equipped with an electro-brake andan incremental encoder for blocking thespeed regulation loop. The free wheel ismounted in the same way with thedifference that the shaft does not need tobe prolonged for the gear reducer to befitted.

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Top guide baseThe top guide base or frame is made upof welded plates, located at the top ofthe column, which are used to supportthe horizontal guide wheels on the toprail. These wheels are covered in a strip ofVULKOLLAN® in order to cushion thenoise that may be produced by operatingthe stacker crane at high speeds.

The top guide base is fitted with theguide pulleys for the lifting cable, whichin turn are mounted on the shafts bymeans of cylindrical roller bearings.

The stacker crane is designed so that theimpact forces on the buffers aretransmitted directly to the floor slab. Inthis way, any forces resulting from themachine crashing into the buffers are nottransmitted to either the structure or thewarehouse roof.

With the aim of ensuring the safe andsilent functioning of the stacker crane,both the drive wheel and the free wheelhave been designed with a machineproduced flat rim made of cast steel. Therolling contact surface has been speciallytreated.

The guidance system in a longitudinaldirection is done using contrast wheelspositioned at both sides of the rolling railand close to both the drive wheel andthe free wheel.

Claws are bolted to the ends of thebottom frame in order to keep thewheels in contact with the rolling rail,thus preventing the carts from derailingin the case of accidental collisions.

>>


MECHANICAL COMPONENTS

Hoisting operationThe function of the lifting mechanism is toraise the mobile frame vertically.

It consists of an alternating current motordesigned to operate vector frequencyconverters and is equipped with anencoder to close the speed and brakingcontrol loop.

This is coupled to a helicoidal conical gearreducer. The side of the gears are speciallytreated and fitted with ground gear teeth.The conical units are also treated andlapped.

The drums are fitted on the shaft of thegear reducer. The lifting cables are woundaround the drums, which are calculatedaccording to the DIN 4130 standard. They are secured by means of a system ofchocks which is easily adjusted anddisassembled.

Mobile hoisting frame or cradleThe purpose of the mobile lifting frame(cradle) is to move the load and the cabinup and down and to perform the pick-upand deposit cycles with the extendableforks fitted on the cradle.

An aluminium striate sheet floor is fittedin the spaces between the two bodies ofthe fork and the structure of the mobileframe. This is designed to support theweight of a person while carrying outmaintenance work.

At the side of the frame next to thecolumn, support rollers are fitted whichcan be adjusted by means of cams. Thisenables the mobile frame to be adjustedhorizontally, vertically and along thelongitudinal axis of the aisle.

The MT model has a built-in speedcontrol mechanism situated in thehoisting cradle, as opposed to the MTBmodel, which has the same mechanismlocated on the side of the machinecolumn, both of which activate thesafety catch to immediately block thecradle.

A speed control mechanism, fitted onthe side of the column of the machine,triggers the fall protection device. Theengagement of the chocks does notdamage the vertical guide profiles.

Extraction systemsA determining element in theperformance of the stacker cranes is thesystem for extracting the load unit. Infunction of the requirements of eachinstallation, the load unit is parameterisedin order to obtain the best results.

The fundamental parameter to take intoaccount, in addition to the extractionspeed, is the depth of the fork’s extension.In function of the relationship betweenthe static and dynamic capacity of eachcase, single, double and even triple depthsystems are used.

Depth is understood as the number ofpallets which can be placed in the rack ateach side of the aisle; hence, the termsingle depth is used when a single pallet isplaced at each side; and double depth isused when two pallets can be placed ateach side of the aisle.

In the systems with a single depth, priorityis given to the speed and flexibility of thesystem over the total storage capacity,while in double depth systems, anexcellent balance is achieved betweenstorage capacity and handling speed.

Different extraction systems are available:

� Single deep� Double deep� Triple deep� Shuttle car� Roller conveyor

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Single-deep telescopic fork

This horizontal handling mechanismenables load units to be deposited in orextracted from single-depth racking.

The telescopic fork is made up of twoarms joined together by a drive shaft, inorder to prevent tension. The greatresistance against torsion of thecoupling guarantees the uniformmovement of the arms. The profiles ofthe hooked connector are insertedtogether by means of curved rollers andsliding guides, which gives thetelescopic arm great strength.

Triple-depth telescopic fork

Enables the placement of three palletsacross each side of the aisle on shelveswhich have top-hats.

These forks are specially indicated forapplications which favour increasedstorage density. The transport systemsusing headers varies slightly, due to thefact that pallets are warehoused andtransported in the opposite direction than normal.

Double-deep telescopic fork

This consists of a horizontal handlingmechanism which helps to deposit orextract load units in double-depthracking by means of telescopic forks.

The telescopic fork is made up of twoarms joined together by chain gearingor an articulated shaft in order toprevent tension. The great resistanceagainst torsion of the couplingguarantees the uniform movement ofthe arms.

The profile of telescoping parts andselected manufacturing materials notonly allows load picking and deliveriesat a second depth level, but also at a150 mm height difference above thefirst depth level. Such a differencegreatly lowers the overall height ofdouble-deep automatic warehouses,with the subsequent saving in buildingspace.

CHARACTERISTICS SINGLE DEEP DOUBLE DEEP

Fork sizes for loads of 1,000 kg

Fork sizes for loads of 1,500 kg

Fork stroke

Height x width of the fork

Maximum deployment speed with load

Maximum deployment speed without load

Acceleration with/without load

Height difference between 1st and 2nd depth

Crossbeam in the shelf location (top-hat)

1,300 mm

1,350 mm

1,425 + 50 mm

65 x 170 mm

40 m/min

80 m/min

0.8 m/s2 /1.5 m/s2

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–

1,300 mm

1,350 mm

2,800 + 50 mm

70 x 180 mm

42 m/min

90 m/min

0.8 m/s2 /2 m/s2

150 mm

–

TRIPLE DEEP

1,900 mm

–

1,435 + 50 mm

75 x 175 mm

40 m/min

80 m/min

0.8 m/s2 /1.2 m/s2

0 mm

270 mm

Shuttle car

This is a mobile cart which is fitted with alifting system. It moves below the loadsalong the inside of the rack on guides,enabling pallets to be loaded andunloaded in storage spaces of up to 20 min depth.

The system makes dense storage possiblein blocks of pallets with different widths,containers or cages.

When applicable, a storage system of thistype offers the following benefits:

On-board conveyors Ideal for feeding live channels withroller tracks that stack by gravity.Totally automates the filling of gravity-fed channels.

� Compact storage minimizing deadspace.

� Allows for the transport of specialpallets of different widths.

� The shuttle car permits the transportof special pallets of differentwidths.

� The direct electrical supply facilitatesthe repair of breakdowns in manualmode operation from the controlpanel.

� The use of proven mechanicalelements, especially standardgearboxes, ensure the greatreliability of the installation.

� The power line runs along the bottomof the shelf by appropriate supportelements.

� VULKOLLAN® wheels eliminate noisewhen running.

� Positioning by absolute encoderdoes not require cams in the rack.

� On-board sensors permit the maximumapproximation between pallets, thusobtaining a high degree ofcompactness.

ELECTRICAL COMPONENTS�


>> MECHANICAL COMPONENTS

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Trilateral forksA special application used in the MT0machines, it can provide solutions toconventional warehouses without theneed for overhead guides.

Offers the option of delivering loadsfrontally and storing them laterally.

Electric box The electric box on board the stackercrane is fitted in the back part of the frontcolumn. The controls are laid out so thatthe stacker crane can be operated as anindividual unit.

The electrical connection to the cradle andthe lift is made through sliding brushesfitted loosely to the cradle.The electricalpower to the stacker crane can be cutthanks to a switch placed alongside theelectrical closet and safety switchesinstalled outside the aisle.

Module to feed energy back into the network

Optionally, an electronic module forfeeding energy back into the network maybe offered. This permits a saving onelectricity consumption of around 15%.The device is assembled on the stackercrane and connects the power supplyvoltage from the intermediate circuit ofthe convertors. When the engines work asgenerators, most of their energy istherefore returned to the client’s supplynetwork for absorption by any otherconsumption element that may beconnected to it.

Data transmissionIn order to establish communicationbetween the decentralised peripheryterminals and the fixed PC or PLC, alongwith the adjustable-speed drives, infraredoptical communication systems(photocells) are used, with reaches of upto 240 m and a transmission speed of 1.5 Mbps, for working temperatures of up to -30 ºC, if necessary.

The fixed photocells are placed at the endof the aisle and the onboard ones aremounted on the bottom guide base. Forthe version of data communicationbetween the mounted box and the liftingcradle, a set of photocells are fitted facingthe cradle and the above mentionedbottom guide base.


The aisle equipment ismade up of a bottom rail, a top guide rail, safetyequipment, electricalsupply, data transmissionand systems formeasuring position.

The bottom guide railA RN-45 type track or equivalent isfastened to the concrete slab with supportplates having anti-vibration plasticinsulators placed at a distance that issuited to the total mass, in order toproperly distribute loads.

This fastening system is quickly and easilylevelled, tolerating live loads and theeffects due to thermal variations.

A special welding method is usedbetween different sections to bear theaforementioned circumstances.

The top guide rail The top guide rail can be formed by aHEA120. It is fixed to the top profiles usedto join the rack structures by means ofwelded adjustment plates.

Contrast wheels apply lateral force to thetop guide track.

AISLE EQUIPMENT�

Position measurement systemsWhen measuring the exact position ofeach axis, the most suitable system isselected:

� Crossbeam detection� Pallet push/pull control� Laser range finder by default� Absolute encoder

Laser telemeters

Optical equipment which measures thedistance at a high precision at a resolutionof 0.1 mm by reflecting the laser beam onthe reflecting panel at the opposite end.These systems are used for controlling thedrive and lifting position. As they do notdepend on any mechanical system whichwould suffer from wear or a wheel whichcould slide out, measurements are directand extremely reliable.

Crossbeam detection

The optical detection of crossbeams hasbeen improved, considering the unit’sarrow that sharpens the precision in loadpick-up/deposits on the shelves.

Pallet push/pull control

Features analogue laser measurers tocontrol the position of the pallets, thuskeeping them from falling when beingpushed or pulled.

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Absolute encoders

Rotary devices with a codified value whichis neither repetitive nor incremental. Theyproduce an absolute and unique value foreach angle of the shaft. They keep themeasured value even when the machinehas been disconnected. They arecommonly installed in telescopic forks andshuttle cars, and are fitted with couplingdevices without excessive sliding or wearand, in most cases, cover short routes.

Electrical safety devices are engagedwhen stopping the stacker crane in orderto access the aisles.


AISLE EQUIPMENT>>

Curved track switches

In this system, it is the stacker crane whichcarries out the manoeuvre of changingfrom one aisle to another by means of arailway-type switch. A simple mechanicaloperation by switching points enables thedestination aisle to be selected.

The main difference of these stackercranes to normal ones is the inclusion ofrotating wheels with side guide rollers,which are fitted in a special console.

The curved track switches system allowsthe stacker cranes to move at high speedsaround these bends.

The top guide fitted around bends andswitches, consists of a rail designed sothat the top contrast wheels of the stackercrane never leave the profile as they travelalong.

They do not require any additionalmaintenance as the components forchanging aisles are simply operated bymeans compressed air systems with a lowlevel of wear.

Transfer shuttle bridge

The transfer shuttle bridge is the machinein charge of moving the stacker cranesfrom one aisle to another. The stackercrane is located on the bridge where it isanchored and moves sideways to thedestination aisle where the transfer is totake place.

This system enables work to be done at ahigher speed inside the aisles, although itis less flexible in terms of changing aislesthan the bend turning system.

The installation of one system or anotherentails an exhaustive study of the factorsinvolved in each case.

Systems for aisle changingstacker craneWhen the required throughput of storedgoods is relatively low, but the storagecapacity must be high, it will be a costsaving solution to use stacker cranes toserve multiple aisles. Mecalux can offerthe following two systems for aislechanging.

� Curved track switches� Transfer shuttle bridge

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OPERATIONAL MODES�

Manual mode (with man on board)Enables all the parts of the stacker crane tobe accessed with restrictions in order tocarry out maintenance and repair work.

This operation mode requires visualcontrol: it is always executed usingmanual controls and at low speeds.

Automated mode (without man on board)Here the orders are executed after beingsent through a communication photocellfrom the transport managementcomputer. In this mode, the followingoperations are executed:

� Location.� Extraction.� Change of location.� Correction of errors in the warehouse.� Self-learning of the storage locations in

the warehouse.

Semi-automated modeThis is used for carrying out supportfunctions, including:

� Automated access to a location,positioning the stacker craneautomatically in the location ordered bythe operator.

� Automated cycle of forks: automaticallyextracts or deposits a load unit in thelocation indicated by the operator.

� Relocating goods.

The stacker cranes ofMecalux can operate in

automated, semi-automatedor manual modes in function

of needs.

SAFETY EQUIPMENT�

Safety equipment on board

� Ladders with landings.

� Safety cable (life line) on which toanchor the harness of the maintenanceoperator when using the ladder toprevent a possible fall. Each machine issupplied with a safety harness for takingbreaks while working at great heights.

� Safety railings fitted in all maintenanceplatforms to safeguard against possibleaccidents.

� Maintenance platforms fitted in thepositions of the stacker crane when it isnot possible to gain access from theground floor. They are accessible fromthe ladder or the cabin.

� Lift for maintenance personnel(optional), independent of the loadlifting system.

Hand ladder and top maintenance platform.

Safety rail.

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Mecalux, aware of the importance ofensuring optimaland safe workingconditions in workstations, has equipped its stacker cranes with the ergonomicand safety equipmentneeded to perform workand maintenanceoperations as simply as possible.

� Control cabin fitted flush with the loadframe.

� An optional heated cabin, in anelevator or on the lifting chassis, ismounted on stacker cranes operating inextreme temperature conditions.

� Certified electronic control with safetybrake, preventing contact with the aisleend buffer.

� Closed cabin with manual controls formaintenance operations.

� Mechanical over-speed detainingsystem for the cradle lift in case thelifting cable breaks.

� Magnetothermic protection in theelectric boxes against over-currents andover-voltage.

� Heat protection in the electric motorsthrough temperature probes againstover-currents. Current limiters in theelectrical supply of motors.

� End stops for lifting and monitoring of the vertical speeds and extraction offorks.

� Touch-sensitive photocell installed inthe cradle to confirm empty storagespaces and to safeguard against palletsfalling.

� System for checking that the forks andthe load are centred before performingdrive and lifting movements.

� Built-in load calculation in cradle lift,which blocks operation on overweightloads or ones with prospective defects.

Aisle safety equipment

� Emergency stop systems of thestacker crane engaged by means ofregulated buttons located in themanual control positions and in specificareas of the installation.

� Emergency stop systems of thestacker crane engaged by a tautcable fitted along the aisle at 20 cmabove the floor, which acts on aregulated safety device.

� Mechanical safety device fitted at theends of the aisle, consisting of hydraulicbuffers fitted rigidly at the aisle ends. Thebuffers are calculated to absorb 100% ofthe impact produced by the stackercrane when travelling at a nominal speedwith the cradle carrying a load.

� End stops in the aisle for controlling thedrive movements.

� Emergency stop areas at the ends ofthe aisle to prevent mechanical impactagainst the hydraulic buffers.

� Fencing, signposting and emergencycircuits well positioned to allow safeaccess to the aisles when doingmaintenance work .

� Touch screen with button pad. The aisleaccess procedure is done according toUNE-EN528 regulations.

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Hydraulic buffer

Touch control screen

Safety barrier

Safety cladding

Door detector closed

and opened with a single

access key

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Wireless transmission systemsfor safety signals

An alternative transmission system to oneusing horizontal electrical line signals, thisone uses radiofrequency safety signalswhich activate prospective emergencystoppages in the facility.

It consists of an emitter located at one endof the aisle and a receiver mounted onboard the crane.

This system presents category 3 safetyaccording to EN954-1 and one IP = d,according to ISO13849-1.


>> SAFETY EQUIPMENT

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MECALUX SLOVENSKO, s.r.oBratislava - tel: 00421 220 545 117

Boženy Nemcovej 8811 04 Bratislava

fax: 00421 220 545 118

For more information visit our website: www.mecalux.skor contact email: [email protected]

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Documents

Stacker Cranes for Pallets SLK · 2018. 7. 11. · Stacker Cranes for Pallets Single-mast pallet stacker cranes (MT0) Designed to handle non-operator automated systems in free-standing