EP0677330B1 - Dispositif de commutation pour actionner le dispositif de coupe d'un destructeur de documents - Google Patents

Dispositif de commutation pour actionner le dispositif de coupe d'un destructeur de documents Download PDF

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Publication number
EP0677330B1
EP0677330B1 EP95103019A EP95103019A EP0677330B1 EP 0677330 B1 EP0677330 B1 EP 0677330B1 EP 95103019 A EP95103019 A EP 95103019A EP 95103019 A EP95103019 A EP 95103019A EP 0677330 B1 EP0677330 B1 EP 0677330B1
Authority
EP
European Patent Office
Prior art keywords
light
switching device
memory
light receiver
switching
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 - Lifetime
Application number
EP95103019A
Other languages
German (de)
English (en)
Other versions
EP0677330A1 (fr
Inventor
Jens Erlecke
Georg Gröger
Jürgen Pechar
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.)
Schleicher and Co International AG
Original Assignee
Schleicher and Co International AG
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 Schleicher and Co International AG filed Critical Schleicher and Co International AG
Publication of EP0677330A1 publication Critical patent/EP0677330A1/fr
Application granted granted Critical
Publication of EP0677330B1 publication Critical patent/EP0677330B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B02C2018/0023—Switching devices

Definitions

  • Document shredders also called document shredders and shredders, are office devices that are usually only available at short notice be put into operation. It is useful if that The device is always in an operational state and by entering an object to be shredded starts up itself. This is usually done through mechanical Sensor or caused by light barriers.
  • These light barriers are in the area of the insertion shaft of the Document shredder arranged. It is mostly about active light barriers, i.e. with a light transmitter and a light receiver. The light output should not be too become large to keep the energy consumption on To minimize the device. Influences of extraneous light and / or Soiling and changes in the characteristics of the Photoelectric switch components can change the switching characteristics such a light barrier change so that the device switches itself on with an external darkening or, when reducing sensitivity, transparent papers, such as carbon paper, no longer recognizes.
  • Adjustable light barriers are normally used to adjust them Means are provided, for example potentiometers, with where the sensitivity is specified or by customer service must be readjusted if changes occur to have.
  • the object of the invention is to provide a switching device for a document shredder with light barrier in the insertion opening to create that from environmental influences and tolerances largely independent of sufficient sensitivity and Maintains operational security.
  • the adjustment device for the light barrier is in one Commissioning phase. This can be done automatically every time when the document shredder is ready is transferred.
  • the insertion opening should be so that when the Output value of the light receiver is detected from which should be switched on by darkening, i.e. the Reference value. That is why it could be useful during commissioning the cutting unit in the shredding direction for a short time or return direction to then press the adjustment phase to connect.
  • the restart should have a certain hysteresis take place, for example, to avoid that with a transparent Paper that is in the feed chute Document shredder stops, as does the let through Radiation, for example through different labeling, changes slightly.
  • the storage means have a digital memory. Between light receiver and storage means should be an analog / digital converter to be on.
  • Such an analog-to-digital conversion can be done for this specially provided components known per se also thereby that a timer, for example a counter, is provided, and of this one of the respective light-dependent State of the light receiver, for example his internal resistance, dependent charging or discharging time of a Capacitor is determined, for example with the help a Schmitt trigger.
  • the time signal thus obtained for Example expressed by corresponding counting units, can then be stored as a reference signal in the storage means.
  • this circuit also generates this operating signal to be compared.
  • an external light adjustment can be provided.
  • a storage value for a the output signal of the Corresponding light receiver when the light transmitter is switched off Extraneous light reference signal can be determined to influence of the threshold or difference value is provided.
  • the extraneous light adjustment contains one during the adjustment phase actuatable shutdown device for the light transmitter. So it is in addition to the total light that is on the Light receiver falls, also the extraneous light is measured independently and the threshold value is determined as a function thereof.
  • the threshold can be either constant or absolute Light value depend on optimal switching conditions to ensure.
  • Fig. 1 shows that in the control unit 17 between two power supply lines 23, 24, possibly via a power supply unit with DC low voltage be supplied, the control electronics for that Device including the light barrier 14 is connected.
  • the light transmitter 15 consists of a light emitting diode and the Light receiver 16 from a photo transistor, the resistors 25, 26 are connected to the terminals 23 and 24.
  • the Voltage level at the light receiver 16 is over a Analog / digital converter 27 converted into digital values.
  • So digitized Output signal of the light receiver can be via a Switch 28, preferably an electronic switch, optionally controlled by an electronic control part 29 directly to an operating input 40 of a comparator 30 or be connected to a memory 31, the stores the digital value of the light receiver output signal, if it is fed to him via the switch 28.
  • One with that Connected memory 32 stores a constant. It forms a threshold or difference value which is different from that in the Memory 31 stored reference signal is subtracted when the comparator cyclically under the control of the control part 29 calls up a comparison
  • a comparison is made before the device is started up for the first time the light barrier. It either happens automatically with switching on via switch 18, or with conscious manual operation, for example by simultaneous Actuation of the switch 18 and the return switch 66.
  • the switch 28 is by the control part 29 from the in Fig. 1 shown operating position switched so that the analog / digital converter 27 connected to the reference value memory 31 is.
  • the light transmitter 15 is in operation and irradiates the light receiver 16 with the maximum illuminance, since no object is in the insertion shaft 13. In addition, there may be Extraneous light.
  • the voltage value present at the light receiver 16 is digitized via the analog / digital converter 27 and stored in memory 31.
  • memory 31 is preferably non-volatile memory (EEPROM's) or for example via a rechargeable battery buffered volatile memory (RAM's).
  • RAM's rechargeable battery buffered volatile memory
  • memory 32 a constant is stored. If it does so accordingly the operating mode explained later in more detail by an unchangeable Is constant, so the memory 32 can be replaced by a program instruction different from that in memory 31 stored reference value in the feed line to the comparator 30 subtracts a certain constant value.
  • the control part, the memory 31 and 32 and the Comparator 30 individual components, integrated circuits or programmable standard digital components that perform the functions explained here under program control and those shown individually for better explanation and described elements functionally included.
  • the comparator 30 is activated at short intervals, which is now present at its operating signal input 40
  • Operating signal of the light receiver 16 with the resulting reference value applied to its reference value input 41 (Value stored in the memory 31 minus the Threshold or difference value in the memory 32) is compared. For example, if a voltage value of 3.5 V was present on the light receiver and this is stored in memory 31 and the threshold / difference value specified in the memory 32 Is 0.5 V, the comparator will fall below a value of 3.5 minus 0.5 equals 3 V a signal give to the control part 29, which operates the engine puts.
  • this threshold By adjusting the size of this threshold can the sensitivity of the light barrier can be set, and although it can be approximated to the reference value to the extent that also almost transparent objects, such as carbon or transparent paper, possibly even foils, into one Switch on.
  • a hysteresis value of 0.2 V would mean that the device is switches off again when a voltage value of 3.2 V is exceeded.
  • the reference value remains stored in the memory 31 until a new adjustment is made and from the new reference value the storage value is overwritten. This is necessary if the basic values of the light barrier change. This can have different reasons. Especially with shredders It can happen that fibers, dirt or dust transmit light and / or soiling and thus the light emission hindering and recording. Light transmitters and receivers for in addition to the photodiodes and transistors described other electrical components can be used subject to a certain aging and also other components in the electrical circuit can change over time. The ambient conditions, for example the ambient lighting, can change and therefore a correction require. Depending on the requirements, the adjustment can be made on a manual intervention remain restricted or in each case automatically at certain intervals or when the device is switched on be made.
  • Is between the switch 28 and the reference value memory 31 another electronic switch 35 is provided which, controlled through the control part 29, the output of the analog / digital converter 27 either to the reference value memory 31 or can switch to a memory 36 that has an extraneous light value can save. It is of the type around a memory, as it is based on the memory 31 and 32 has been described.
  • non-volatile memories can save the saved data when the device is switched on from previous matching operations. she are then compared to the newly measured ones. Based on this The controller can recognize values and, if necessary, the operator report whether paper or a in the current comparison process other foreign objects are in front of the light barrier. This data is, so to speak, calibration data and can described and / or overwritten by the special operation will. A new calibration can therefore be carried out by switching on for example the back button 66 is operated.
  • the normal machine function a stay of objects in the Avoid light well after the end of the operation, because that Control part is set up so that a certain time Follow-up is carried out in order to ensure that the light barrier is released even after it has been released To convey the object completely through the cutting unit.
  • This version is in addition to the features of 2 an adaptation of the light barrier data provided for the incidence of extraneous light.
  • the resistors 25, 26 influenced by the control part 29 it is possible to adjust the light intensity of the Light transmitter 15 and / or the sensitivity of the light receiver 16 to change. Because the light squared the increase in distance can be reduced by changing the radiation power the light source and / or shift of the working point the light receiver automatically adjusts to different ones Monitoring distances or external light influences be created.
  • the control part 29 can be dependent on the size of the total light or ambient light reference value adjust the light barrier data to for example with a large surveillance distance and strong Incident light a usable light barrier sensitivity bring about.
  • the radiation power of the light transmitter 15 can be increased if during the adjustment process the relative difference between total light and extraneous light is found to be so small that the response the light barrier is impaired. In this Trap would increase this by increasing the radiation power Ratio brought back to a usable value will.
  • circuit branch 55 containing the light sensor a capacitance connected in the form of a capacitor 56 and there is a connection between this and the light receiver 16 58 to circuit branch 52 and, via a Schmitt trigger 57, made to timer 62.
  • Parallel to the capacitor 56 lies in the capacitor 56 parallel circuit branch 52 an electronic switch 59, a diode 60 and a resistor 61.
  • a resettable time counter 62 is integrated in the control part 29.
  • the adjustment phase When the adjustment phase is triggered, it becomes like all switches electronically controlled switch 59 closed by the control part 29 and thereby discharge the capacitor 56. After that the switch 59 is opened. Thereafter, the switch 50 closed and the time counter 62 started. The condenser 56 is accordingly about the one containing the light receiver 16 Branch 55 loaded with switch 50 closed.
  • the result of the time counter which is in digital form, is proportional to the output signal of the light sensor 16 and is stored in memory 31. In the same way the external light measurement when the light transmitter is switched off 15.
  • control goes into an endless loop, at the same way by closing the switch 59 of the Capacitor 56 is discharged. Thereafter, the switch 50 closed and the timer started. The condenser is charged via the switch 50 and the light receiver 16.
  • the Schmitt trigger input is monitored and if it switches, the time counter 62 is stopped. Then the Switch 50 opened and the capacitor charge through the Light receiver 16 ended. The respective operating status of the light receiver corresponding count result is over the in the operating position (shown in Fig. 4) lying switch 28 fed to the operating input 40 of the comparator and in already described the comparison with the data in the memories 31, 32 and 36 performed.
  • the switching device with adjustable Photoelectric switch has numerous advantages offers. It not only makes it possible to open a light barrier the most diverse operating conditions, ambient light influences etc. automatically set, but also largely automatically in a wide range on the light barrier compensate for operational disabilities that occur, for example Contamination and foreign bodies in the light path, scratches of light exit and entry areas, performance and Changes in sensitivity due to component aging and the like, but it is also possible to largely use the light barrier without factory modification in different document shredders with different light well openings etc. to use.
  • the respective basic sensitivity can (Constant in memory 32) preset at the factory or also adjustable or automatically based on the other measurement results be customizable. All of this can be done without expert knowledge Intervention.
  • the invention makes it possible also, which was constantly needed during operational readiness To keep the light output of the light barrier low thus the low energy used for this even further reduce.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Geophysics And Detection Of Objects (AREA)

Claims (10)

  1. Dispositif de commutation pour commuter un entraínement d'un dispositif de découpage (21) d'un massicot ou destructeur de documents (11) à fractionnement, avec une ouverture d'insertion (13) pour des objets à fractionner, tels que documents ou autres matériaux, le dispositif de commutation présentant un barrage photoélectrique (14) disposé dans le champ de l'ouverture d'insertion (13) avec photoémetteur (15) et photorécepteur (16), caractérisé en ce que le barrage photoélectrique (14) présente un dispositif d'ajustage ou d'égalisation, actionnable pendant une phase d'ajustage, lequel présente des moyens pour déterminer un signal de référence, présent pendant la phase d'ajustage, du signal de sortie du photorécepteur (16) et pour la mémorisation de celui-ci, et un comparateur (30), lequel est formé pour la comparaison du signal de référence avec le signal de sortie de mise en service du photorécepteur en tenant compte d'une valeur seuil respectivement de différence et donnant lieu à la formation d'un signal de commutation pour l'entraínement d'un dispositif de découpage (21).
  2. Dispositif de commutation selon la revendication 1, caractérisé en ce que les moyens de mémorisation (31, 32, 36) présentent une mémoire numérique et/ou un convertisseur analogique-numérique (27) est inséré entre photorécepteur (16) et moyens de mémorisation.
  3. Dispositif de commutation selon la revendication 1 ou 2, caractérisé en ce que les moyens de mémorisation (31, 32, 36) contiennent une mémoire non volatile, telle qu'une EEPROM ou une RAM avec mise au registre tampon.
  4. Dispositif de commutation selon une des revendications précédentes, caractérisé en ce que le dispositif d'ajustage contient une mémoire (32) pour la valeur seuil respectivement de différence, qui est déduite du signal de référence respectivement est ajoutée au signal de sortie de mise en service pour comparaison.
  5. Dispositif de commutation selon une des revendications précédentes, caractérisé en ce que le comparateur (30) régle des relais (19, 20) par l'intermédiaire d'un élément de réglage (29) électronique pour l'actionnement du dispositif de découpage.
  6. Dispositif de commutation selon une des revendications précédentes, caractérisé en ce que la phase d'ajustage est enclenchable au moment de l'enclenchement du destructeur de documents (11) automatiquement et/ou manuellement, éventuellement par actionnement d'un commutateur de mise en marche (18) au même temps d'un commutateur de retour (66) pour l'entraínement du dispositif de découpage (21).
  7. Dispositif de commutation selon une des revendications précédentes, caractérisé en ce que de préférence additionnellement à la détermination et mémorisation d'un signal de référence, des moyens (36) pour la détermination et mémorisation pour le signal de sortie du photorécepteur, le barrage photoélectrique (14) étant en état de mise en service (photoémetteur (15) connecté) est prévu un ajustage par lumière secondaire ou parasitaire.
  8. Dispositif de commutation selon une des revendications précédentes, caractérisé en ce que une mémoire (36) est prévue pour un signal de référence de lumière secondaire, correspondant au signal de sortie du photorécepteur (16), le photoémetteur (15) étant déconnecté, pour agir sur la valeur seuil respectivement de différence et un dispositif de déconnexion (37), actionnable pendant la phase d'ajustage, est prévu pour le photoémetteur (15).
  9. Dispositif de commutation selon une des revendications précédentes, caractérisé par un réglage (25, 26) pour le flux lumineux du photoémetteur (15) et/ou la sensibilité du photorécepteur (16), lequel est actionnable en fonction du résultat du processus d'ajustage, et notamment de l'influence de la lumière secondaire.
  10. Dispositif de commutation selon une des revendications précédentes, caractérisé par un élément de temporisation (62), par exemple un compteur, lequel élément détermine un temps de charge respectivement de décharge, dépendant du respectif état photo-dépendant du photorécepteur (16), d'une capacité (56), par exemple à travers une bascule de Schmitt (57), comme signal de référence et/ou de service à conduire aux mémoires (31, 32, 36).
EP95103019A 1994-04-15 1995-03-03 Dispositif de commutation pour actionner le dispositif de coupe d'un destructeur de documents Expired - Lifetime EP0677330B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4413079 1994-04-15
DE4413079A DE4413079A1 (de) 1994-04-15 1994-04-15 Schalteinrichtung zum Schalten eines Schneidwerk-Antriebes eines zerkleinernden Dokumentenvernichters

Publications (2)

Publication Number Publication Date
EP0677330A1 EP0677330A1 (fr) 1995-10-18
EP0677330B1 true EP0677330B1 (fr) 1998-08-19

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Application Number Title Priority Date Filing Date
EP95103019A Expired - Lifetime EP0677330B1 (fr) 1994-04-15 1995-03-03 Dispositif de commutation pour actionner le dispositif de coupe d'un destructeur de documents

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EP (1) EP0677330B1 (fr)
DE (2) DE4413079A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437351B4 (de) * 1994-10-19 2007-05-10 Martin Yale International Gmbh Verfahren zum Abgleichen einer Schutzschaltung für einen Elektromotor
DE4437348C2 (de) * 1994-10-19 2003-11-06 Schleicher & Co Int Ag Dokumentenvernichter mit einem Schneidwerk und einer Lichtschranke
DE10047992A1 (de) * 2000-09-28 2002-04-11 Schleicher & Co Int Ag Datenshredder mit einem über einen elektrischen Antrieb angetriebenen Schneidwerk
DE10047990A1 (de) * 2000-09-28 2002-04-11 Schleicher & Co Int Ag Datenshredder und Schaltungsanordnung für denselben
DE10111907A1 (de) 2001-03-13 2002-10-31 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur Entwertung von Blattgut
CH700580B1 (de) * 2003-09-10 2010-09-30 Baumer Electric Ag Messeinrichtung sowie Vorrichtung und Verfahren zur Minimierung von Fremdlichteinflüssen bei dieser Messeinrichtung.
WO2007137761A1 (fr) * 2006-06-01 2007-12-06 Dahle Bürotechnik Gmbh Destructeur de documents

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
JPS5713327A (en) * 1980-06-27 1982-01-23 Laurel Bank Mach Co Ltd Optical detector
JPS5970990A (ja) * 1982-10-18 1984-04-21 Ricoh Co Ltd 調光方法
DE3312191A1 (de) * 1983-04-02 1984-10-11 Karl Mengele & Söhne Maschinenfabrik und Eisengießerei GmbH & Co, 8870 Günzburg Schutzvorrichtung fuer mechanische schraenke und dergleichen geraete bzw. maschinen
DE3409818A1 (de) * 1984-03-16 1985-09-26 Siemens AG, 1000 Berlin und 8000 München Optoelektronisches abtastsystem mit automatischem abgleich
DE3612788A1 (de) * 1986-04-16 1986-09-11 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Ueberlastungsschutz fuer geraet zum zerkleinern von blattfoermigem material
EP0244850B1 (fr) * 1986-05-08 1991-02-27 Sharp Kabushiki Kaisha Déchiqueteur
DE3819285A1 (de) * 1988-06-07 1989-12-14 Ehinger Adolf Eba Maschf Elektrische steuereinrichtung fuer aktenvernichter
DE3843602A1 (de) * 1988-12-23 1990-07-05 Gao Ges Automation Org Verfahren bzw. vorrichtung zum automatischen ueberwachen der zerstoerung von duennem blattgut
JPH03138254A (ja) * 1989-10-20 1991-06-12 Canon Inc 紙葉体検出装置
DE9010998U1 (de) * 1990-03-01 1990-10-25 Sartorius AG, 3400 Göttingen Komparatorschaltung für Signale einer Lichtschranke
JPH0583499A (ja) * 1991-03-13 1993-04-02 Riso Kagaku Corp 紙葉類情報廃棄処理装置
FI88133C (fi) * 1991-06-24 1993-04-13 Icl Personal Systems Oy Skrivare eller annan motsvarande utmatningsanordning
DE4124669B4 (de) * 1991-07-25 2005-07-14 Schleicher & Co International Ag Zerkleinerungs-Antrieb für einen Dokumentenvernichter

Also Published As

Publication number Publication date
DE59503225D1 (de) 1998-09-24
EP0677330A1 (fr) 1995-10-18
DE4413079A1 (de) 1995-10-19

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