EP0386699A2 - Driving mechanism for a paper shredder - Google Patents

Driving mechanism for a paper shredder Download PDF

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Publication number
EP0386699A2
EP0386699A2 EP90104269A EP90104269A EP0386699A2 EP 0386699 A2 EP0386699 A2 EP 0386699A2 EP 90104269 A EP90104269 A EP 90104269A EP 90104269 A EP90104269 A EP 90104269A EP 0386699 A2 EP0386699 A2 EP 0386699A2
Authority
EP
European Patent Office
Prior art keywords
drive
sides
gear
recesses
plane
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.)
Granted
Application number
EP90104269A
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German (de)
French (fr)
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EP0386699B1 (en
EP0386699A3 (en
Inventor
Hermann Schwelling
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Individual
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Publication of EP0386699A2 publication Critical patent/EP0386699A2/en
Publication of EP0386699A3 publication Critical patent/EP0386699A3/en
Application granted granted Critical
Publication of EP0386699B1 publication Critical patent/EP0386699B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • 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
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/24—Drives

Definitions

  • the invention relates to a drive device for the knife rollers of a document shredder, consisting of an electric motor with a reduction gear and a so-called overrunning clutch in the form of a driving pin at one end of one of the shafts of the knife rollers, in the plane of rotation of which on the same shaft end seated drive wheel a stop with two stop surfaces is provided.
  • such a document shredder drive equipped with a so-called overrunning clutch is specifically known from DE-PS 16 11 752 and is used primarily for malfunctions due to blockages or jams of clippings, for the free running of the knife rollers in reverse gear and the restart in forward gear under load, always to have sufficient torque available.
  • the known reduction gear constructed from toothed belts and corresponding pulleys, has a pin located at the end of one of the knife roller shafts, which cooperates with a stop attached in its plane of rotation to the associated pulley with two stop faces.
  • Such an overrunning clutch may work quite satisfactorily with reduction gears equipped with toothed belts, but not with those that essentially consist of gear wheels, especially when it comes to inexpensive plastic wheels that are used more and more in mass production today.
  • the inevitably resulting tilting of the gear in question from the asymmetrical loading by the coupling pin relative to the assigned pinion would lead to point loads on the teeth and their increased wear, if not even their destruction.
  • the object of the present invention is therefore also to construct means and measures to be provided which definitely exclude the aforementioned risk of tipping.
  • the knife rollers 11 are, for example, via ball bearings 17 in the Mounted side parts 1, which together with the bottom 2 and the cross struts 4 form the frame of the document shredder drive.
  • the electric drive motor 5 in the form of a reversing motor and a bearing plate 3 for holding a toothed wheel 7, which meshes with the drive pinion 6 of the motor 5, also sits on the side part 1 shown.
  • the actual overrunning clutch now consists in that the two flat sides 9a and 9b of the idler gear 9 have cutouts 14 in the hub area and these stop faces 15 and 16 delimiting them on both sides, and the drive shaft extension 12a of the associated cutter roller shaft 12 has drive pins 13 which are associated with the cutouts 14 and stop faces 15 and 16 correspond.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

A drive for the cutter blocks (11) of a paper shredder consists of an electric motor (5) with downstream reduction gear (6 to 10). Situated on each of the plane sides (9a and 9b) of an intermediate gearwheel (9) are recesses (14) and mutually opposite stop faces (15 and 16) which, in cooperation with corresponding driving pins (13) on the associated free shaft end (12a) of the cutter block drive shafts (12), constitute a free-wheel coupling for forward- and backward- movement actuation. <IMAGE>

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patent­anspruchs 1 auf eine Antriebsvorrichtung für die Messer­walzen eines Aktenvernichters, bestehend aus einem Elektro­motor mit Untersetzungsgetriebe und einer sog. Überholkupp­lung in Form eines Mitnehmerstiftes an einem Ende einer der Wellen der Messerwalzen, in dessen Drehebene an dem auf dem gleichen Wellenende sitzenden Antriebsrad ein An­schlag mit zwei Anschlagflächen vorgesehen ist.According to the preamble of claim 1, the invention relates to a drive device for the knife rollers of a document shredder, consisting of an electric motor with a reduction gear and a so-called overrunning clutch in the form of a driving pin at one end of one of the shafts of the knife rollers, in the plane of rotation of which on the same shaft end seated drive wheel a stop with two stop surfaces is provided.

Neben mit konzentrisch angeordneten Aussparungen gemäß der DE-PS 924 507 versehenen Sperrscheibenkupplungen allgemei­ner Art ist ein derartiger, mit einer sog. Überholkupplung ausgerüsteter Aktenvernichterantrieb speziell aus der DE-PS 16 11 752 bekannt und dient hierbei vor allem dazu, bei Betriebsstörungen durch Verstopfungen oder Verklemmungen von Schnittgut, für das Freilaufen der Messerwalzen im Rückwärtsgang sowie das Wiederanlaufen im Vorwärtsgang unter Last, stets ein ausreichendes Drehmoment zur Verfügung zu haben. Das bekannte, aus Zahnriemen und entspr. Riemenscheiben aufgebaute Untersetzungsgetriebe weist zu diesem Zweck einen am Ende einer der Messerwalzenwellen sitzenden Stift auf, der mit einem in seiner Drehebene an der zugeordneten Riemenscheibe befestigten Anschlag mit zwei Anschlagflächen zusammenwirkt. Eine derartige Überholkupplung mag zwar durchaus zufrieden­stellend bei mit Zahnriemen bestückten Unter­setzungsgetrieben arbeiten, nicht jedoch bei solchen, die im wesentlichen aus Zahnrädern bestehen, zumal wenn es sich noch um preiswerte Räder aus Kunststoff handelt, die heute mehr und mehr bei Großserienfertigung Verwendung finden. Hier nämlich würde die aus der unsymme­trischen Belastung durch den Kupplungsstift zwangsläufig resultierende Kippung des be­treffenden Zahnrades gegenüber dem zugeordneten Ritzel zu punktförmigen Belastungen der Zähne und deren erhöhtem Verschleiß, wenn nicht sogar deren Zerstörung führen.In addition to locking disc clutches of a general type provided with concentrically arranged cutouts according to DE-PS 924 507, such a document shredder drive equipped with a so-called overrunning clutch is specifically known from DE-PS 16 11 752 and is used primarily for malfunctions due to blockages or jams of clippings, for the free running of the knife rollers in reverse gear and the restart in forward gear under load, always to have sufficient torque available. For this purpose, the known reduction gear, constructed from toothed belts and corresponding pulleys, has a pin located at the end of one of the knife roller shafts, which cooperates with a stop attached in its plane of rotation to the associated pulley with two stop faces. Such an overrunning clutch may work quite satisfactorily with reduction gears equipped with toothed belts, but not with those that essentially consist of gear wheels, especially when it comes to inexpensive plastic wheels that are used more and more in mass production today. Here, namely, the inevitably resulting tilting of the gear in question from the asymmetrical loading by the coupling pin relative to the assigned pinion would lead to point loads on the teeth and their increased wear, if not even their destruction.

Die Aufgabe der vorliegenden Erfindung besteht deshalb auch darin, bauliche Mittel und Maßnahmen vorzusehen, die die zuvor erwähnte Gefahr einer Kippung mit Sicherheit ausschließen.The object of the present invention is therefore also to construct means and measures to be provided which definitely exclude the aforementioned risk of tipping.

Gelöst wird diese Aufgabe dabei durch die im Patentanspruch 1 niedergelegte Bauform; der Unteranspruch beinhaltet eine sinnvolle Erweite­rung des Lösungsgedankens.This object is achieved by the design laid down in claim 1; the subclaim includes a meaningful extension of the solution.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert. Es zeigt

  • Fig. 1 eine Teilansicht auf das Getriebe, das die Motorantriebs­welle mit den Messerwalzen verbindet,
  • Fig. 2 eine Draufsicht dazu mit ab­genommenem Gehäusedeckel und
  • Fig. 3 das Kupplungsrad im Lösungs­schnitt.
The invention is explained in more detail below using an exemplary embodiment. It shows
  • 1 is a partial view of the gearbox that connects the motor drive shaft to the knife rollers,
  • Fig. 2 is a plan view of this with the housing cover removed and
  • Fig. 3, the clutch wheel in solution section.

Bei der dargestellten Ausführungsform sind die Messerwalzen 11 z.B. über Kugellager 17 in den Seitenteilen 1 gelagert, die zusammen mit dem Boden 2 und den Querstreben 4 den Gestellrahmen des Aktenvernichterantriebs bilden. An dem dar­gestellten Seitenteil 1 sitzt zudem der elektri­sche Antriebsmotor 5 in Form eines Reversier­motors und ein Lagerschild 3 zur Halterung eines Zahnrades 7, das mit dem Antriebsritzel 6 des Motors 5 kämmt. Ein mit dem Zahnrad 7 drehfest verbundenes Zwischenritzel 8 steht seinerseits mit einem lose auf der zapfenartigen Verlänge­rung 12a einer der Messerwalzenwellen 12 sitzenden Zwischenrad 9 in Verbindung und vervollständigt somit das Untersetzungsgetriebe für die über das Räderpaar 10 in gegenläufiger Antriebsver­bindung stehenden Messerwalzen.In the illustrated embodiment, the knife rollers 11 are, for example, via ball bearings 17 in the Mounted side parts 1, which together with the bottom 2 and the cross struts 4 form the frame of the document shredder drive. The electric drive motor 5 in the form of a reversing motor and a bearing plate 3 for holding a toothed wheel 7, which meshes with the drive pinion 6 of the motor 5, also sits on the side part 1 shown. An intermediate pinion 8, which is connected in a rotationally fixed manner to the gearwheel 7, is in turn connected to an intermediate wheel 9 which is loosely seated on the pin-like extension 12a of one of the knife roller shafts 12 and thus completes the reduction gear for the knife rollers which are in opposite drive connection via the pair of wheels 10.

Die eigentliche Überholkupplung besteht nun darin, daß die beiden Planseiten 9a und 9b des Zwischenrades 9 im Nabenbereich Aussparungen 14 und diese beidseits begrenzenden Anschlag­flächen 15 und 16 aufweisen und die Antriebs­wellenverlängerung 12a der zugehörigen Messer­walzenwelle 12 zugeordnete Mitnehmerstifte 13 aufweist, die mit den Aussparungen 14 und An­schlagflächen 15 und 16 korrespondieren.The actual overrunning clutch now consists in that the two flat sides 9a and 9b of the idler gear 9 have cutouts 14 in the hub area and these stop faces 15 and 16 delimiting them on both sides, and the drive shaft extension 12a of the associated cutter roller shaft 12 has drive pins 13 which are associated with the cutouts 14 and stop faces 15 and 16 correspond.

Die Funktionsweise dieser Vorrichtung ist nun folgende:
Kommt der Motor 5 z.B. durch irgend eine Ver­stopfung der Messerwalzen 11 in bekannter Weise zum Stillstand, wird der Motorrücklauf einge­schaltet. Die zuvor beispielsweise an den An­schlagflächen 15 anliegenden Mitnehmerstifte 13 laufen dann durch den Freiraum der Aussparun­gen 14 zurück und der Motor erreicht wieder sein volles Drehmoment, ehe die Stifte 13 an die Flächen 16 anschlagen und somit zumeist die Verstopfung sofort lösen. Die beste Wirkung wird bei dieser neuen Bauform noch durch zusätz­liche, rotationssymmetrische Anordnung der Kupplungsglieder 13 bis 16 auf beiden Plan­seiten 9a und 9b des betreffenden Zahnrads 9 erreicht.The operation of this device is now as follows:
If the motor 5 comes to a standstill, for example due to any blockage of the knife rollers 11, the motor return is switched on. The driver pins 13, which previously rested, for example, on the stop surfaces 15, then run back through the free space of the cutouts 14 and the motor reaches its full torque again before the pins 13 strike the surfaces 16 and thus usually immediately solve the blockage. The best effect is achieved in this new design by additional, rotationally symmetrical arrangement of the coupling members 13 to 16 on both plane sides 9a and 9b of the gear 9 in question.

BezugsziffernverzeichnisList of reference numbers

  • 1 Gestell-Seitenteil1 frame side part
  • 2 Gestellboden2 rack bases
  • 3 Lagerschild3 end shield
  • 4 Querstreben4 cross struts
  • 5 Antriebsmotor5 drive motor
  • 6 Antriebsritzel6 drive sprockets
  • 7 Zahnrad7 gear
  • 8 Zwischenteil8 intermediate part
  • 9 Zwischenrad9 idler gear
  • 9a Planseite9a plan page
  • 9b Planseite9b plan page
  • 10 Schneidwalzenantriebszahnrad10 cutting drum drive gear
  • 11 Messerwalze11 knife roller
  • 12 Messerwalzenwelle12 knife roller shaft
  • 12a Wellenverlängerung12a shaft extension
  • 13 Mitnehmerstift13 drive pin
  • 13a Bohrung zur Stiftaufnahme13a hole for pin holder
  • 14 Aussparung14 recess
  • 15 Anschlagfläche15 stop surface
  • 16 Anschlagfläche16 stop surface
  • 17 Kugellager17 ball bearings
  • 18 Nabe18 hub

Claims (3)

1. Antrieb für die Messerwalzen ( 11 ) eines Akten­vernichters, bestehend aus einem Elektromotor ( 5 ) mit Untersetzungsgetriebe ( 6, 7, 8, 9, 10 ) und einer sog. Überholkupplung in Form eines Mitnehmerstiftes ( 13 ) an einem Ende einer der Wellen ( 12 ) der Messerwalzen ( 11 ), in dessen Drehebene an dem auf dem gleichen Wellen­ende ( 12a ) sitzenden Antriebsrad ( 9 ) ein Anschlag mit zwei Anschlagflächen ( 15 und 16 ) vorgesehen ist,
dadurch gekennzeichnet,
daß zumindest die die sog. Überholkupplung (13 bis 16) tragenden Glieder des Untersetzungs­getriebes (6 bis 10) als Zahnrädergetriebe aus­gebildet und die Kupplungsglieder (13 bis 16) spiegelbildlich auf beiden Seiten (9a und 9b) des zugehörigen Zahnrads (9) angeordnet sind.1. Drive for the knife rollers (11) of a document shredder, consisting of an electric motor (5) with reduction gear (6, 7, 8, 9, 10) and a so-called overrunning clutch in the form of a driving pin (13) at one end of one of the shafts (12) the knife rollers (11), in the rotational plane of which a stop with two stop surfaces (15 and 16) is provided on the drive wheel (9) seated on the same shaft end (12a),
characterized,
that at least the members of the reduction gear (6 to 10) carrying the so-called overrunning clutch (13 to 16) are designed as gearwheels and the coupling members (13 to 16) are arranged in mirror image on both sides (9a and 9b) of the associated gearwheel (9). 2. Antrieb nach Anspruch 1
gekennzeichnet durch
zusätzliche, rotationssymmetrische Anordnung der Kupplungsglieder (13 bis 16) auf beiden Planseiten (9a und 9b) des betreffenden Zahn­rads (9).2. Drive according to claim 1
marked by
Additional, rotationally symmetrical arrangement of the coupling members (13 to 16) on both plane sides (9a and 9b) of the gear (9) in question. 3. Antrieb nach den Patentansprüchen 1 und 2,
dadurch gekennzeichnet,
daß beide Planseiten ( 9a und 9b ) des Zwischenrades ( 9 ) im Bereich der Nabe ( 18 ) spiegelbildlich zur Radmittelebene liegende Aussparungen ( 14 ) und diese beidseits begrenzende Anschlagflächen ( 15 und 16 ) auf­weisen und die frontseitig aus der Nabe ( 18 ) heraus­ragende Antriebswellenverlängerung ( 12a ) der zugehö­ rigen Messerwalzenwelle ( 12 ) ebenfalls spiegel­bildlich zum Zwischenrad ( 9 ) angeordnete Mit­nehmerstifte ( 13 ) aufweist, die in den mit den Anschlagflächen ( 15 und 16 ) versehenen Ausspa­rungen ( 14 ) laufen.3. Drive according to claims 1 and 2,
characterized,
that both plane sides (9a and 9b) of the idler gear (9) in the area of the hub (18) have recesses (14) which are mirror images of the wheel center plane and have stop faces (15 and 16) which delimit both sides and the drive shaft extension projecting from the front of the hub (18) (12a) the associated Rige knife roller shaft (12) also has a mirror image of the idler gear (9) arranged driver pins (13) which run in the recesses (15 and 16) provided with recesses (14).
EP90104269A 1989-03-07 1990-03-06 Driving mechanism for a paper shredder Expired - Lifetime EP0386699B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907316A DE3907316A1 (en) 1989-03-07 1989-03-07 DRIVE FOR THE KNIFE ROLLERS OF A SHREDDER
DE3907316 1989-03-07

Publications (3)

Publication Number Publication Date
EP0386699A2 true EP0386699A2 (en) 1990-09-12
EP0386699A3 EP0386699A3 (en) 1991-10-30
EP0386699B1 EP0386699B1 (en) 1994-01-26

Family

ID=6375731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104269A Expired - Lifetime EP0386699B1 (en) 1989-03-07 1990-03-06 Driving mechanism for a paper shredder

Country Status (3)

Country Link
US (1) US5014920A (en)
EP (1) EP0386699B1 (en)
DE (2) DE3907316A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10208845B2 (en) * 2015-02-02 2019-02-19 Flender Gmbh Drive arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW456270U (en) * 1999-06-04 2001-09-21 Tsai Shau Nung Safety device for paper flipping of shredder
CN102514029B (en) * 2012-01-16 2015-05-27 林志宪 Paper-cutting chain cutter box device used in paper film laminating machine
DE102012100681B4 (en) 2012-01-27 2022-09-01 Hermann Schwelling Document shredder with turbo function
CN106269130A (en) * 2016-08-30 2017-01-04 浙江鲨鱼食品机械有限公司 A kind of Multifunctional meat chopper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453728A1 (en) * 1964-04-06 1969-05-08 Bueche Dr Ernst Centrifugal pump for heating
GB1190635A (en) * 1967-08-24 1970-05-06 Prvni Brnenska Strojirna Zd Y Improvements in or relating to Turbines.
DE1611752B1 (en) * 1966-02-11 1972-05-31 Schleicher Co Feinwerktech Drive for the knife rollers of a device for cutting up documents
DE2748619A1 (en) * 1977-10-29 1979-05-03 Schleicher Co Feinwerktech Document shredding machine - has driving assembly with elastic element to protect motor against overload

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924507C (en) * 1952-06-28 1955-03-03 Pee Wee Maschinen Und Appbau I Device for feeding workpieces in machine tools having two tool rolls, in particular thread rolling machines
US3703970A (en) * 1971-02-23 1972-11-28 Benson Ind Ltd Apparatus for treating waste material
US4026480A (en) * 1974-04-17 1977-05-31 Hobart Corporation Jam breaking method for comminuting device
US4034918A (en) * 1975-08-06 1977-07-12 Saturn Manufacturing, Inc. Drive arrangement for rotary shredding apparatus
GB2096919B (en) * 1981-03-11 1984-12-05 Matsushita Electric Ind Co Ltd Shredder
US4793561A (en) * 1982-05-24 1988-12-27 Mac Corporation Of America Speed-responsive reversing hydraulic drive for rotary shredder
US4609155A (en) * 1985-04-09 1986-09-02 Shredding Systems, Inc. Shredding apparatus including overload protection of drive line
US4721257A (en) * 1986-12-04 1988-01-26 Williams Patent Crusher And Pulverizer Company Rotary shredding apparatus
GB2215235B (en) * 1988-02-25 1992-02-05 Ofrex Group Holdings Plc Improvements relating to shredding machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453728A1 (en) * 1964-04-06 1969-05-08 Bueche Dr Ernst Centrifugal pump for heating
DE1611752B1 (en) * 1966-02-11 1972-05-31 Schleicher Co Feinwerktech Drive for the knife rollers of a device for cutting up documents
GB1190635A (en) * 1967-08-24 1970-05-06 Prvni Brnenska Strojirna Zd Y Improvements in or relating to Turbines.
DE2748619A1 (en) * 1977-10-29 1979-05-03 Schleicher Co Feinwerktech Document shredding machine - has driving assembly with elastic element to protect motor against overload

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10208845B2 (en) * 2015-02-02 2019-02-19 Flender Gmbh Drive arrangement

Also Published As

Publication number Publication date
EP0386699B1 (en) 1994-01-26
EP0386699A3 (en) 1991-10-30
DE3907316A1 (en) 1990-09-13
DE59004373D1 (en) 1994-03-10
US5014920A (en) 1991-05-14
DE3907316C2 (en) 1992-03-12

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