EP2471163A1 - Moteur d'entraînement - Google Patents

Moteur d'entraînement

Info

Publication number
EP2471163A1
EP2471163A1 EP10725991A EP10725991A EP2471163A1 EP 2471163 A1 EP2471163 A1 EP 2471163A1 EP 10725991 A EP10725991 A EP 10725991A EP 10725991 A EP10725991 A EP 10725991A EP 2471163 A1 EP2471163 A1 EP 2471163A1
Authority
EP
European Patent Office
Prior art keywords
axis
drive motor
electric drive
cutting blade
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10725991A
Other languages
German (de)
English (en)
Inventor
Günther Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weber Maschinenbau GmbH Breidenbach
Original Assignee
Weber Maschinenbau GmbH Breidenbach
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weber Maschinenbau GmbH Breidenbach filed Critical Weber Maschinenbau GmbH Breidenbach
Publication of EP2471163A1 publication Critical patent/EP2471163A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B26D5/06—Means for moving the cutting member into its operative position for cutting by electrical means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
    • B26D2210/08—Idle cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0608—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by pushers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/18—Machines moving with multiple degrees of freedom
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6656—Rectilinear movement only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only

Definitions

  • the invention relates to an electric drive motor for driving an object, in particular a cutting blade of a device for slicing food products, in particular a high-performance slicer.
  • the invention also relates to a device for slicing food products, in particular a high-performance slicer.
  • This slicing device is provided in particular with a drive motor according to the invention.
  • the invention relates to a cutter head for a device for slicing food products, in particular a high-performance slicer.
  • the invention relates to the use of an electric drive motor according to the invention in a device for slicing food products, in particular a high-performance slicer.
  • the invention relates to a method for slicing food products.
  • high-performance slicers for slicing food products are provided with one or more cutting blades which either rotate planetary about an axis and additionally rotate about their own rotation axis or rotate exclusively about their own rotation axis.
  • the latter are designed in particular as so-called sickle or spiral knives.
  • cutting blades are in particular so-called circular knives.
  • the cutting speed is up to several thousand slices per minute, ie such slicers require a drive capable of rotating the cutting blade at speeds of up to a few thousand revolutions per minute.
  • the weight of a slicer knife is typically about 5 kg for circular knives and up to 20 kg for sickle knives.
  • the knife carrier or the knife holder must therefore also be set in rotation.
  • the total of a slicer drive to be rotated in rotation mass ie in a sense the "payload" of the drive without its own weight, is typically in the range of 40 to 70 kg.
  • the separated product slices are not removed individually, but so-called portions of product slices are formed in which the product slices are stacked or shingled over one another, for example.
  • the removal of the separated product slices is thus carried out in portions, i. after a slice portion has been formed, it must first be removed from the portion-forming area into which the separated slices fall, until the formation of the next slice portion can be started. The higher the cutting speed, the less time is available for the removal of the slice portions.
  • This additional measure consists in ensuring that during the blank cuts a distance is established between the knife on the one hand and the front end of the product on the other hand.
  • it is known to withdraw either the product alone or the product together with at least some parts of the product guide or product support.
  • This method leads in practice in many applications to satisfactory results, but is particularly problematic because of the high demands on the mechanism required for the retraction movement and extremely difficult to realize, especially at very high cutting speeds and / or particularly heavy products.
  • axial movements of the blade of a slicer can not only serve to make blanks, but there are also other situations where axial movement of the blade is required.
  • the cutting gap is the axial distance between the plane defined by the blade of the blade, on the one hand, and the plane defined by the so-called cutting edge, on the other hand.
  • the cutting edge which is also referred to as a counter knife, interacts with the knife during the cutting process and forms the conclusion of the product feed.
  • the cutting gap adjustment is at a standstill, i. non-rotating, knife, with other methods allow a cutting gap adjustment, especially at nominal or cutting speed rotating knife, which is advantageous for various reasons. Also, for the purpose of this cutting gap adjustment, it is desirable to be able to accomplish the required axial movement of the knife with minimal use of mechanical means.
  • the object of the invention is therefore to provide a drive with which a rotating object can be moved with minimal use of mechanical means parallel to its axis of rotation, whereby this In particular, it should be suitable for the field of high-performance slicers for performing blank cuts and / or for cutting gap adjustment.
  • the electric drive motor is designed to drive the object to rotational movements about an axis and axial movements parallel to the axis.
  • the invention is thus based on the idea of providing the object in question with a single electric drive motor, which on the one hand serves as a rotational drive for the object and, on the other hand, is also capable of moving the object in the axial direction. In this way, the invention leaves the path taken in the state of the art, which consists of providing an auxiliary drive for the axial movement of the rotating object or the required axial movement of the object in whatever manner by the rotary drive with the aid of mechanically complex means derive.
  • the invention opens up the possibility, without of course being limited thereto, of developing known electric rotary drives in such a way that, in addition to a rotational operation, an axial movement of the object in question is possible, so that only a single drive motor is required.
  • the invention provides the particularly advantageous possibility of attaching the knife directly to the engine, ie the motor or its outer area can simultaneously serve as a so-called knife carrier or knife holder. This does not exclude, of course, that a separate knife carrier or a separate knife holder is provided, the or the one attached to the engine and on the other hand, the knife is interchangeably attached.
  • the motor is designed to carry out the axial movements simultaneously with the rotational movements.
  • the motor comprises a rotor that is both rotatable about the axis and movable parallel to the axis.
  • the rotor is preferably provided with at least one electrically energizable coil.
  • this at least one coil is designed and arranged to enable the rotor exclusively in rotation about the axis.
  • an electromagnet for the axial movement can be associated with the rotor an electromagnet in a development.
  • the rotary drive of the rotor thus takes place as in a conventional electric motor, whereas for the axial movement an electromagnet is provided, which of course acts on the rotor, just like the coil providing the rotational movement.
  • no additional drive is required.
  • no mechanical means are needed for this axial movement.
  • the rotor is provided with at least two electrically energizable coils, by means of which the rotor can be moved in rotation about the axis and is movable parallel to the axis.
  • the coils are in particular excitable independently.
  • the coils effect the rotational movement and the axial movement together.
  • the coils are arranged with respect to the axis in opposite directions and / or excitable. This makes it possible to always cause a rotation of the rotor by a suitable excitation of the coils, but as needed either to avoid axial movement of the rotor or to temporarily move the rotor in addition to the rotation in the axial direction.
  • At least one coil has a surface normal with a component parallel to the axis. This ensures that the rotor is exerted on a force acting parallel to the axis and thus the rotor is moved in the axial direction. At least one coil preferably has at least one diagonal winding.
  • the motor in particular the rotor of the motor, is designed as a carrier for a cutting blade or can be connected to a separate carrier for a cutting blade.
  • the motor is adapted to drive an article whose weight is in the range of 10 kg to 100 kg. This weight is, in a sense, the payload of the engine.
  • the motor is configured to rotate the article at a speed of a few hundred to several thousand revolutions per minute.
  • the motor is adapted to perform axial movements of a length of 1 mm to 10 mm within a time of 0.02 seconds to 0.5 seconds.
  • the motor according to the invention is suitable as a drive for a cutting blade of a high-performance slicer.
  • the slicing device in particular the high-performance slicer according to the invention, comprises a product feed, at least one cutting knife, to which at least one product to be sliced can be fed, and a single electric drive motor for the cutting knife, whereby the cutting knife makes rotational movements about an axis and by means of the drive motor to axial movements parallel to the axis is driven.
  • the drive motor is in particular the drive motor according to the invention, as described above.
  • a feed direction of the slicing device, with which the product can be fed to the cutting blade preferably runs parallel to the axis of rotation of the cutting blade.
  • the slicing device is designed to move the cutting blade parallel to the axis by means of the drive motor for carrying out blank cuts and / or for setting a cutting gap.
  • the cutter head according to the invention for a slicing device in particular for a high-performance slicer, comprises a carrier for a cutting blade of the slicing device and an electric drive motor according to the invention as described above.
  • the motor itself can be designed as a carrier for the cutting blade or be connectable to a separate carrier for the cutting blade.
  • the use according to the invention consists of using the electric drive motor according to the invention as described above in a slicing apparatus, in particular a high-performance slicer, for carrying out blank cuts and / or for setting a cutting gap.
  • a slicing apparatus in particular a high-performance slicer
  • at least one product to be sliced is fed to a cutting knife, wherein the cutting knife is driven by means of a single electric drive motor, which is in particular a drive motor according to the invention as described above, to rotational movements about an axis and to axial movements parallel to the axis.
  • the motor has a rotor with at least two electrically energizable coils through which the rotor is movable in rotation about the axis and parallel to the axis movable, wherein for a pure rotation operation, the coils excited in opposite directions with each other canceling axial components and to perform an axial movement, the coils are excited to different degrees with a resultant axial component.
  • each coil to produce an axial component, ie to exert on the rotor a force acting in the axial direction, wherein for a pure Rotation operation, the control or energizing of the coils is carried out in opposite directions, as these axial components just compensate, while the control or excitation of the coils takes place with the result of a resultant force in the axial direction, when an axial movement of the rotor should take place.
  • the motor has a rotor with at least one electrically energizable coil, by means of which the rotor is set exclusively in rotation about the axis, the method being characterized in that for carrying out an axial movement of the rotor Runner is moved by means of an electromagnet parallel to the axis.
  • the axial movement of the cutting blade is carried out in particular for carrying out blank cuts
  • the cutting blade is moved parallel to the axis as it rotates about the axis.
  • FIG. 1 is a schematic side view of a slicing device according to the invention with both a rotationally displaceable and axially movable cutting blade
  • FIG Fig. 2 shows schematically a drive motor according to the invention, with which a cutting blade about an axis in rotation displaceable and parallel to this axis is movable.
  • Fig. 1 shows in a schematic side view of a high-performance slicer according to the invention, which serves to cut food products 27, such as meat, sausage, ham or cheese into slices.
  • the product 27 rests on a product support 37 and is moved by means of a product feed along a product feed direction F in the direction of a cutting plane S.
  • the feed direction F is perpendicular to the cutting plane S.
  • the cutting plane S is defined by a cutting edge 31, also referred to as a counter knife, which forms the front end of the product support 37.
  • the cutting edge 31 cooperates with the cutting edge of a cutting blade 11.
  • the cutting blade 11 may be a so-called circular blade, which rotates planetary about both an axis, not shown, as well as about its own axis of rotation A.
  • the cutting blade 11 may be a so-called sickle or spiral blade that does not orbit planetary, but only rotates about the axis A.
  • the drive according to the invention for the cutting blade 11 is not shown in FIG. 1, but will be explained below in connection with FIG.
  • the knife drive is designed to set the knife about the axis A in rotation and to move parallel to the axis A, wherein the axial movement serves to carry out the blank sections explained in the introduction part.
  • a dashed line shows a position of the blade 11 in which there is an axial clearance between the plane defined by the blade of the blade 11 on the one hand and the cutting plane S on the other hand, which avoids the chip or chip formation explained in the introductory part.
  • the separated product slices 33 form portions 35, which are shown in Fig. 1 as a disk stack. Once a portion 35 is completed, this portion 35 is transported in a direction T.
  • the drive motor 13 for the cutting blade 11 shown in FIG. 2 is a special electric motor which has a rotor 15, also referred to as rotor or armature.
  • the front end of the rotor 15 is designed as a knife carrier 29 to which the cutting knife 11 is exchangeably fixed.
  • the drive motor 13 is mounted on a base 39 of the slicing device, wherein this attachment can be done in any desired manner. Relative to this base 39, the rotor 15 is rotatably supported both about the axis A and movable in the direction of the axis A.
  • the rotor 15 is provided with a plurality of coils, of which only two coils 17, 19 are shown in the schematic illustration according to FIG.
  • Each coil 17, 19 has at least one winding 21, 23 which is oriented with respect to the axis A such that the surface normal N 1, N 2 with the axis A an angle ⁇ , ß includes, in principle, any value between 0 ° and 90 ° can take.
  • the windings 21, 23 are thus diagonal windings.
  • This orientation of the coils 17, 19 has the consequence that the surface normal Nl, N2 of the windings 21, 23 each have a component noot perpendicular to the axis of rotation A.
  • a rotor 15 in rotation staggering torque is generated when passing through the windings 21, 23, an electric current I flows according to the principle of a conventional electric motor.
  • FIG. 2 It should be noted at this point that the remaining components of the motor, in particular the devices for magnetic field generation, are not shown in FIG. 2 for the sake of simplicity. It should also be noted that the schematic representation of FIG. 2 serves to explain the basic principle of this embodiment. In particular, the sizes and vectors shown are not to be understood in the sense of a complete construction manual.
  • FIG. 2 shows a functional principle in an operating situation in which the coils 17, 19 can be excited by a control device 41 in such a way that cancel the mentioned axial forces against each other, so that momentarily no axial movement of the rotor 15 takes place, wherein the coils 17, 19 but together have a resulting rotational movement of the rotor 15 about the axis A result.
  • this drive motor 13 can be used not only to carry out blank cuts, but also to set a respectively required cutting gap between them. see cutting plane of the knife and cutting edge plane are used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

L' invention concerne un moteur d'entraînement électrique destiné à entraîner un objet, en particulier un couteau d'un dispositif servant à découper des produits alimentaires, en particulier d'un trancheur de grande puissance. Le moteur est conçu pour entraîner l'objet de manière à ce qu'il effectue des mouvements de rotation autour d'un axe et des mouvements axiaux parallèles à cet axe.
EP10725991A 2009-08-26 2010-06-16 Moteur d'entraînement Withdrawn EP2471163A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009038875A DE102009038875A1 (de) 2009-08-26 2009-08-26 Antriebsmotor
PCT/EP2010/003601 WO2011023256A1 (fr) 2009-08-26 2010-06-16 Moteur d'entraînement

Publications (1)

Publication Number Publication Date
EP2471163A1 true EP2471163A1 (fr) 2012-07-04

Family

ID=42932046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10725991A Withdrawn EP2471163A1 (fr) 2009-08-26 2010-06-16 Moteur d'entraînement

Country Status (4)

Country Link
US (1) US20120222526A1 (fr)
EP (1) EP2471163A1 (fr)
DE (1) DE102009038875A1 (fr)
WO (1) WO2011023256A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK2844441T3 (en) * 2012-04-30 2016-09-12 Gea Food Solutions Germany Gmbh Cutter blade with a safety REMOVING
DE102012207304A1 (de) 2012-05-02 2013-11-21 Weber Maschinenbau Gmbh Breidenbach Antriebsvorrichtung
DE102012207303A1 (de) 2012-05-02 2013-11-07 Weber Maschinenbau Gmbh Breidenbach Vorrichtung zum Aufschneiden von Lebensmittelprodukten
DE102016107849A1 (de) * 2016-04-28 2017-11-02 Tvi Entwicklung Und Produktion Gmbh Schneidemaschine sowie Verfahren zum Aufschneiden von elastischen Strängen, insbesondere Fleischsträngen

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JPS60239939A (ja) * 1984-05-14 1985-11-28 Hitachi Ltd 対物レンズ駆動装置
DE3538017A1 (de) * 1985-10-25 1987-04-30 Triumph Adler Ag Elektrischer antrieb
DE3714810A1 (de) 1987-05-04 1988-11-17 Guenther Weber Circularschneidemaschine
DE4214246A1 (de) 1992-04-30 1993-11-04 Walter Dr Ing Baumann Einrichtung zur reinigung eines luftstromes von leichtfluechtigen verunreinigungen sowie verfahren zum betreiben einer solchen einrichtung
DE4214264C2 (de) * 1992-05-01 1994-06-01 Natec Reich Summer Gmbh Co Kg Schneidevorrichtung zum aufschneiden von lebensmittelprodukten, insbesondere wurst, schinken, speck, fleisch, kaese und dergleichen
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DE29822282U1 (de) 1998-12-14 2000-04-20 Dixie Union Gmbh & Co Kg Schneidmaschine zum Aufschneiden von Lebensmitteln
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DE10157243A1 (de) * 2001-11-22 2003-06-05 Roland Man Druckmasch Reibzylinder einer Rotationsdruckmaschine
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Also Published As

Publication number Publication date
DE102009038875A1 (de) 2011-03-03
WO2011023256A1 (fr) 2011-03-03
US20120222526A1 (en) 2012-09-06

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