EP0138702B1 - Appareil pour industries agro-alimentaires à accès contrôlé par un dispositif créant une variation d'impédance électrique - Google Patents

Appareil pour industries agro-alimentaires à accès contrôlé par un dispositif créant une variation d'impédance électrique Download PDF

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Publication number
EP0138702B1
EP0138702B1 EP84402017A EP84402017A EP0138702B1 EP 0138702 B1 EP0138702 B1 EP 0138702B1 EP 84402017 A EP84402017 A EP 84402017A EP 84402017 A EP84402017 A EP 84402017A EP 0138702 B1 EP0138702 B1 EP 0138702B1
Authority
EP
European Patent Office
Prior art keywords
detector
protection
tank
stop
control device
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.)
Expired
Application number
EP84402017A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0138702A1 (fr
Inventor
Gilbert Emery Dufoug
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.)
Bonnet SA
Original Assignee
Bonnet SA
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 Bonnet SA filed Critical Bonnet SA
Publication of EP0138702A1 publication Critical patent/EP0138702A1/fr
Application granted granted Critical
Publication of EP0138702B1 publication Critical patent/EP0138702B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation

Definitions

  • the present invention relates to an apparatus for the food industry with controlled access.
  • Known devices for the food industry such as a mixer or kneader with a fixed or rotating tank are often fitted with a safety device preventing access to their tank during their operation.
  • This safety device is usually a mechanical device which closes the space between their rotating tool holder and the edge of the opening of their tank.
  • This safety device is often made up either of a metal grid or a full, opaque or transparent screen.
  • This mechanical safety device which has so far proved effective in protecting the user against bodily injury constitutes however a drawback in the execution of the preparation of food products. Indeed, certain agro-food preparations require either constant monitoring of the state of the products in preparation or a control of the degree of their evolution or an addition in predetermined phases of the operation of other products or ingredients during operation devices, while the presence of this mechanical safety device hinders or prohibits this monitoring or this introduction of products or ingredients.
  • this mechanical safety device in the form of a grid or an element with a complicated structure hardly lends itself to easy maintenance of essential hygiene for the devices used in the agro-food industries.
  • the present invention aims to avoid these drawbacks, makes it possible to produce a device for the food industry provided with a protection and access control device, economical, effective, easy to maintain from the hygienic point of view.
  • the device performs a metered selectivity of the bodies to let those who are authorized pass and trigger the shutdown of the device as soon as those who are prohibited arrive.
  • An appliance for the food industry such as a controlled access beater 1, schematically illustrated by a rectangle in FIG. 1, comprises a device 2 which constitutes with the frame and the tank of the beater 1 a combination which their provides two functions in this device, that of protecting the user against bodily accidents caused by the rotating parts of the device in operation, by cutting the electrical supply to the latter's drive motor, in other words by triggering a stop of operation of the device as soon as the user or a part of his body is at a predetermined and adjustable distance from the rotating parts of the device, and that of access control to this device in particular to the latter's tank in which the products intended for a predetermined food preparation are found, and turns the working tool of the apparatus, allowing only a free ccess to this tank of agri-food products or ingredients and utensils or preparation instruments having certain predetermined characteristics by abstaining from acting on the operation of the device.
  • the protection and access control device 2 comprises an element (3) developing an electric field called in the following detector 3, arranged in the space between the rotating tool holder of the beater-mixer 1 and the edge of the opening of the tank 4 of this apparatus for _. form an intangible veil for protection and access control of this space.
  • the detector 3 may be constituted by a sensitive element of an electrical assembly of the known type with an oscillator stage 5 and an electromagnetic relay stage 6 usually serving as an alarm device, the approaching or approaching in other words the presence or absence of the user modifies the impedance of the circuit of the oscillator 5 respectively causes a stall or a re-establishment of the oscillation and consequently causes an excitation or a de-excitation of the relay in stage 6.
  • This device can further comprise an electrical supply circuit 7 connected to an electrical source 8 through a switch 9.
  • the oscillator stage 5 comprises a transistor 25, the base of which is biased by a voltage divider consisting of two resistors 26, 27 connected in series across the terminals of the power supply circuit 7 and provided with a decoupling capacitor 28.
  • a circuit oscillating 29 constituted by an adjustable inductor 30 and a capacitor 31 in parallel, is mounted on the collector of transistor 25 in series with a decoupling cell comprising a resistor 32 and a capacitor 33.
  • the detector 3 is connected to a point 39 located between this oscillating circuit 29 and the collector of transistor 25 by a conductor 18.
  • the emitter circuit of transistor 25 includes a resistor 34 on which is collected through capacitors 35, 36 the control signal of the electromagnetic relay 6.
  • a capacitor variable 37 mounted between the emitter and the collector of transistor 25 allows by its adjustment to adjust the operating point of oscillator 5, that is to say the limit point d latching and unhooking of the oscillator to the selected limits of variations in impedance of the oscillator stage 5 caused by the presence of bodies whose passage is authorized or not authorized in the protective field developed by the protection device and access control 2. These limits are chosen so that the bodies whose passage is authorized such as the instruments or utensils of preparation having preselected physical characteristics or the additional products or ingredients only cause variations in impedance of the oscillator stage 5 below these limits while bodies whose passage is prohibited such as the human body or a part of the human body only cause variations in the impedance of the oscillator stage 5 greater than these limits.
  • the relay of stage 6 of the electrical assembly of the protection and access control device 2 controls the opening or closing of a drive motor 10 of the mixer-mixer 1 ( Figure 1) through a known contactor 11 of the self-powered type ( Figure 3), the motor 10 being for example a three-phase motor supplied by a three-phase electrical distribution network L "L 2 , L 3 , T.
  • the device 2 stops the operation as soon as the user enters the preset prohibited zone developed by the detector 3, but authorizes on the other hand access to the tank to food products or ingredients 4 and to the utensils or preparation instruments not electrically conductive or non-metallic and non-magnetic.
  • the detector in the form of a rod or U-shaped thread is placed in the space between the tool holder 12 and the edge of the opening of the tank 4 and fixed on an axis 13 pivotally mounted on the frame of the mixer 1.
  • the detector 3 is provided with stops which determine its rest position not shown, and its working position shown in FIG. 4.
  • the detector 3 comprises a front stop 14 which, in the working position of the detector rests on the edge of the tank 4.
  • a cam 15 which controls a closing of the power supply switch 9 of the electrical assembly with oscillator stage 5 and relay stage 6 when the detector is in the working position shown in FIG. 3, and opening of this switch 9 when the detector 3 is in the rest position not shown.
  • the facets 16 and 17 of the cam 15 can constitute stops which determine the degree of pivoting of the detector 3 or its rest and working positions.
  • the detector 3 is preferably connected to the electrical assembly with an oscillator stage 5 and a relay stage 6 of the device 2, by a cable. coaxial schematically represented in 18 in broken lines.
  • the detector 3 is fixed and mounted on the frame of the mixer-mixer 1 while the cam 15 which controls the closing and opening of the switch 9 is fixed on a pin 19 mounted pivoting on the frame of the mixer 1.
  • a stop 20 is also fixed on the axis 19 to determine, in accordance with the cam 15, a closing of the switch 9 as soon as this stop 20 rests on the tank 4 of the mixer 1.
  • the stops 14 (FIG. 4) and 20 (FIG. 5) comprise several shoulders which allow them to rest correctly on the edges of the openings of various tanks 4 which have different predetermined dimensions and are suitable for the preparations carried out by the mixer-mixer 1 .
  • the detector 3 whose shape and structure are simple, is easy to maintain for essential hygiene of devices for the food industry.
  • the detect 3 can have any other shape than that in U shown.
  • the detector 3 is placed in the frame of the mixer 1 inside the part 21 (FIGS. 4 and 5) surrounding the tool holder 12.
  • the outer wall of part 21 and of the part of the frame which is located near this detector is made of an electrically non-conductive and non-magnetic material or of a material which does not prevent the effectiveness of detector 3 in the prohibited prohibited area to the user, located between the tool holder 12 and the edge of the opening of the tank 4 of the mixer-mixer 1 in the formation of its electric field.
  • the filiform U-shaped detector 3 leaves the user with large free and available intervals allowing easy access to the tank 4 where the working tool turns, by means of non- electrical and non-magnetic conductors.
  • the area prohibited to the user covering the space between the tool holder 12 and the edge of the opening of the tank 4 is made adjustable in a known manner by the electrical assembly with oscillator stage 5 and with relay 6 to which detector 3 is connected.
  • the protection device protection and access control of the mixer-mixer fulfills outside this protection or prohibition function of this device alarm or security, an authorization function for access or passage to certain elements which have predetermined characteristics, for example those of non-conduction of electricity and non-magnetism of the products or food ingredients, utensils and instruments for preparation specific to the mixer 1 described in the preceding paragraphs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food-Manufacturing Devices (AREA)
  • Hydroponics (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Safety Devices In Control Systems (AREA)
EP84402017A 1983-10-14 1984-10-08 Appareil pour industries agro-alimentaires à accès contrôlé par un dispositif créant une variation d'impédance électrique Expired EP0138702B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8316387A FR2553299A1 (fr) 1983-10-14 1983-10-14 Appareil pour industries agro-alimentaires a acces controle par un dispositif creant une variation d'impedance electrique
FR8316387 1983-10-14

Publications (2)

Publication Number Publication Date
EP0138702A1 EP0138702A1 (fr) 1985-04-24
EP0138702B1 true EP0138702B1 (fr) 1987-09-02

Family

ID=9293149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402017A Expired EP0138702B1 (fr) 1983-10-14 1984-10-08 Appareil pour industries agro-alimentaires à accès contrôlé par un dispositif créant une variation d'impédance électrique

Country Status (10)

Country Link
US (1) US4683381A (ja)
EP (1) EP0138702B1 (ja)
JP (1) JPS60151703A (ja)
AU (1) AU3417884A (ja)
CA (1) CA1245746A (ja)
DE (1) DE3465704D1 (ja)
ES (1) ES8506467A1 (ja)
FI (1) FI74588C (ja)
FR (1) FR2553299A1 (ja)
NO (1) NO844100L (ja)

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GB8716108D0 (en) * 1987-07-08 1987-08-12 Truro School Safety system for machinery
FR2759301B1 (fr) * 1997-02-13 1999-04-30 Denis Rouhier Dispositif de securite pour outil mobile
FR2771023B1 (fr) * 1997-11-20 1999-12-31 Dito Sama Machine du type batteur-melangeur
US6135630A (en) * 1998-09-02 2000-10-24 Color Access, Inc. Mixer mounting system
FR2789603A1 (fr) * 1999-02-11 2000-08-18 Robert Viot Dispositif de securite pour batteurs melangeurs
US7040559B2 (en) 2004-04-02 2006-05-09 Fellowes Inc. Shredder with lock for on/off switch
US8870106B2 (en) * 2004-09-10 2014-10-28 Fellowes, Inc. Shredder with thickness detector
US7631822B2 (en) 2004-09-10 2009-12-15 Fellowes Inc. Shredder with thickness detector
US7311276B2 (en) * 2004-09-10 2007-12-25 Fellowes Inc. Shredder with proximity sensing system
US7661614B2 (en) * 2004-09-10 2010-02-16 Fellowes Inc. Shredder throat safety system
US7954737B2 (en) * 2007-10-04 2011-06-07 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8672247B2 (en) 2005-07-11 2014-03-18 Fellowes, Inc. Shredder with thickness detector
GB2437594B (en) * 2006-04-24 2010-08-11 Acco Uk Ltd A shredding machine
CN2915259Y (zh) 2006-07-14 2007-06-27 上海震旦办公设备有限公司 碎纸机触碰安全装置
US8008812B2 (en) 2006-07-14 2011-08-30 Aurora Office Equipment Co., Ltd. Paper shredder control system responsive to touch-sensitive element
GB2451513B (en) 2007-08-02 2012-04-18 Acco Uk Ltd A shredding machine
CN201239643Y (zh) 2008-08-06 2009-05-20 上海震旦办公设备有限公司 不择纸的全自动碎纸机
CN201244502Y (zh) 2008-08-19 2009-05-27 上海震旦办公设备有限公司 自动碎纸机可剃钉结构
US8201761B2 (en) 2009-01-05 2012-06-19 Fellowes, Inc. Thickness sensor based motor controller
US8430347B2 (en) * 2009-01-05 2013-04-30 Fellowes, Inc. Thickness adjusted motor controller
US8091809B2 (en) * 2009-03-24 2012-01-10 Fellowes, Inc. Shredder with jam proof system
CN101543800A (zh) 2009-05-07 2009-09-30 上海震旦办公设备有限公司 碎纸机防卡纸保护装置
US8205815B2 (en) * 2009-05-15 2012-06-26 Fellowes, Inc. Paper alignment sensor arrangement
US8678305B2 (en) * 2009-06-18 2014-03-25 Fellowes, Inc. Restrictive throat mechanism for paper shredders
US8550387B2 (en) * 2009-06-18 2013-10-08 Tai Hoon K. Matlin Restrictive throat mechanism for paper shredders
US8382019B2 (en) 2010-05-03 2013-02-26 Fellowes, Inc. In-rush current jam proof sensor control
US8511593B2 (en) 2010-05-28 2013-08-20 Fellowes, Inc. Differential jam proof sensor for a shredder
US8723468B2 (en) 2011-04-28 2014-05-13 Aurora Office Equipment Co., Ltd. Cooled motor
US8708260B2 (en) 2011-08-08 2014-04-29 Aurora Office Equipment Co., Ltd. Depowered standby paper shredder and method
FR3003625B1 (fr) * 2013-03-22 2015-04-24 Evoli Dispositif de securite par debrayage d'un outil rotatif dans une cuve, notamment de caille, dans la fabrication du fromage
AT520184B1 (de) * 2017-09-18 2019-02-15 Zeta Biopharma Gmbh Rührkopf mit Identifikationsvorrichtung
IT201900001601A1 (it) * 2019-02-04 2020-08-04 Caseartecnica Bartoli S R L Caldaia per la lavorazione del latte e la produzione del formaggio comprendente mezzi di sicurezza

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Also Published As

Publication number Publication date
CA1245746A (en) 1988-11-29
ES536718A0 (es) 1985-08-01
JPS60151703A (ja) 1985-08-09
AU3417884A (en) 1985-04-18
EP0138702A1 (fr) 1985-04-24
NO844100L (no) 1985-04-15
US4683381A (en) 1987-07-28
FI74588C (fi) 1988-03-10
FI844021L (fi) 1985-04-15
FR2553299A1 (fr) 1985-04-19
FI844021A0 (fi) 1984-10-12
FI74588B (fi) 1987-11-30
ES8506467A1 (es) 1985-08-01
DE3465704D1 (en) 1987-10-08

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