EP0502355B1 - Messerwellen-Abstreifvorrichtung für Schriftgutvernichter - Google Patents

Messerwellen-Abstreifvorrichtung für Schriftgutvernichter Download PDF

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Publication number
EP0502355B1
EP0502355B1 EP92102655A EP92102655A EP0502355B1 EP 0502355 B1 EP0502355 B1 EP 0502355B1 EP 92102655 A EP92102655 A EP 92102655A EP 92102655 A EP92102655 A EP 92102655A EP 0502355 B1 EP0502355 B1 EP 0502355B1
Authority
EP
European Patent Office
Prior art keywords
cutter
webs
stripping
block
roller
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
EP92102655A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0502355A1 (de
Inventor
Willi Strohmeyer
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.)
Geha Werke GmbH
Original Assignee
Geha Werke GmbH
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 Geha Werke GmbH filed Critical Geha Werke GmbH
Publication of EP0502355A1 publication Critical patent/EP0502355A1/de
Application granted granted Critical
Publication of EP0502355B1 publication Critical patent/EP0502355B1/de
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
    • B02C2018/0069—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents with stripping devices

Definitions

  • the invention relates to a knife shaft stripping device for document shredders, whose one-piece stripping webs are arranged in the cutting unit in the cutting zone between the knives of the knife shafts.
  • the invention has for its object to simplify the structure of a document shredder and to reduce the number of items and the required assembly and adjustment.
  • the invention has the characterizing features of claim 1.
  • the fact that the stripping webs are produced as a stripping block which can be fastened in a receptacle of a housing part of the document shredder achieves a simplified construction of the device. The cost of manufacturing the individual parts can be reduced.
  • the arrangement of the scraper block with the scraper bars obtains the required stability by assigning support bars to the scraper bars, which are arranged on the opposite housing part.
  • the scraper webs and the support webs are provided with support surfaces which lie one on top of the other in the assembled state of the cutting mechanism, such that the scraper webs are supported and the scraper block is fixed in its position.
  • the receptacle for the stripping block is trough-shaped and the stripping block is arranged in the receptacle with play ensures that certain manufacturing tolerances of the knife shafts can be compensated for automatically.
  • the scraper block positions itself automatically when the cutting unit is installed according to the position of the knives of the knife shafts.
  • the stripping block as a molded part, in particular as a plastic molded part.
  • Scraper webs molded from plastic also have the required stability due to the design described.
  • the support webs are injection-molded in one piece with a plastic housing part.
  • a further simplification of the structure of the cutting mechanism can be achieved.
  • the receptacle for the stripping block is preferably arranged on the lower housing part of the document shredder, while the support webs are arranged on the upper housing part.
  • the support surfaces of the scraper webs and the support webs are then above the cutting zone of the cutting unit in the area of the paper feed, so that any edges in the area of the support surfaces can in no way negatively influence the function of the scraper webs. This preferred solution reliably rules out a jam of shredded paper particles in the cutting unit.
  • bearing surfaces for the knife shafts are also injected into the lower housing part or into the upper housing part in addition to the receptacle for the stripping block and the supporting webs, the construction and in particular also the assembly of the cutting mechanism can be further simplified considerably. This also applies in particular if the receptacle for a drive motor and bearing surfaces for a transmission are also injected. All of the essential components of the cutting unit are then correctly positioned in relation to one another without an adjustment having to be made. As already stated, manufacturing tolerances of the knife shaft can, if necessary, be compensated for by arranging the stripping block with the stripping bars in its receptacle with play.
  • 1 denotes a cutting device of a document shredder.
  • the cutting unit 1 has two knife shafts 2, on which, in a manner known per se, interlocking knives 3 are arranged for comminuting the writing material not shown in the drawing.
  • a knife shaft stripping device consisting of two rows of stripping webs 4 and associated supporting webs 5 is arranged on the two knife shafts 2.
  • the stripping webs 4 are combined to form a stripping block 6.
  • the stripping webs 4 engage in the spaces between the knives 3 of the knife shafts 2 and fill them. This prevents shredded documents from entering these gaps.
  • the stripping webs 4 are comb-shaped and molded in one piece from plastic to form a stripping block 6.
  • a trough-shaped receptacle 8 is arranged on the lower housing part 7 for the stripping block 6.
  • the stripping block 6 is held in the receptacle 8 in the assembled state of the cutting unit 1.
  • the stripping block 6 is preferably arranged with play in this receptacle 8, so that then manufacturing tolerances of the knife shaft 2 are automatically compensated.
  • the support webs 5 have on their upper end face support surfaces 9 which are arranged at an angle to one another.
  • Corresponding support surfaces 10 are arranged on the end faces of the scraper webs 4. In the assembled state of the cutting unit 1, d. H. When the upper housing part 11 is placed on the lower housing part 7, the support surfaces 9 and 10 lie one on top of the other.
  • the support surfaces 10 of the support webs 5 engage in the support surfaces 9 of the wiper webs in such a way that the wiper webs 4 are supported both laterally and in the vertical direction.
  • the stability of the cutting mechanism 1 is further increased by reinforcing ribs 12 arranged on the receptacle 8.
  • the interlocking of the stripping webs 4 and the supporting webs 5 also increases the overall stability of the document shredder housing consisting of the lower housing part 7 and the upper housing part 11 in an advantageous manner.
  • a paper inlet shaft 13 is arranged in the upper housing part 11 for feeding the paper to be shredded.
  • bearing surfaces 14 for the knife shafts 2 are arranged in the lower housing part 7 and in the upper housing part 11. These bearing surfaces 14, like the receptacle 8 for the stripping block 6 and the supporting webs 5, are injected into the lower housing part 7 and into the upper housing part 11.
  • bearing surfaces 17 for a gear 18 are also injected into the upper housing part 11 and the lower housing part 7.
  • the drive motor 16 drives the knife shafts 2 of the cutting mechanism 1 via the gear 18.
  • the paper For shredding, the paper, not shown in the drawing, is introduced into the paper inlet shaft 13 and then reaches the knives 3 of the knife shafts 2. The overlapping knives 3 shred the paper, the stripping webs 4 preventing the paper from entering the spaces between the knives 3 occurs. The shredded paper then passes through a paper channel 19 formed between the stripping bars 4 and supporting bars 5 arranged on both sides into a collecting container, not shown in the drawing.
  • the scraper webs 4 are supported by the support webs 5, despite their preferred design as a flexible plastic part, they are precisely fixed in their position. As has surprisingly been shown, it is ensured on the basis of the design according to the invention that the stripping webs 4 remain in their position during the comminution process. Even under the action of the forces exerted by the paper to be shredded, there is no such deformation of the scraper webs 4 molded from plastic that malfunctions could occur.
  • the design of the stripping webs 4 and the supporting webs 5 as a plastic injection molded part results in the advantage of a very inexpensive production.
  • the individual parts of the document shredder are very easy to assemble in the inventive design.
  • the stripper block 6 it is ultimately only necessary to insert the stripper block 6 into its receptacle 8, the knife shafts 2 into its bearing surfaces 14, the drive motor 16 into its receptacle 15, and the transmission 18 into the lower housing part 7 insert into its bearing surface 17. Then the upper housing part with the support webs 5 and the corresponding bearing surfaces is placed.
  • the stripping block 6 is aligned and fixed automatically on the support surfaces 10 of the support webs 5 and on the knife shafts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Facsimile Heads (AREA)
EP92102655A 1991-03-04 1992-02-15 Messerwellen-Abstreifvorrichtung für Schriftgutvernichter Expired - Lifetime EP0502355B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4106792 1991-03-04
DE4106792A DE4106792C1 (enExample) 1991-03-04 1991-03-04

Publications (2)

Publication Number Publication Date
EP0502355A1 EP0502355A1 (de) 1992-09-09
EP0502355B1 true EP0502355B1 (de) 1995-06-28

Family

ID=6426392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102655A Expired - Lifetime EP0502355B1 (de) 1991-03-04 1992-02-15 Messerwellen-Abstreifvorrichtung für Schriftgutvernichter

Country Status (7)

Country Link
US (1) US5400978A (enExample)
EP (1) EP0502355B1 (enExample)
AT (1) ATE124296T1 (enExample)
DE (2) DE4106792C1 (enExample)
DK (1) DK0502355T3 (enExample)
ES (1) ES2075492T3 (enExample)
GR (1) GR3017227T3 (enExample)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511732A (en) * 1994-12-28 1996-04-30 Fellowes Manufacturing Company Document shredding machine with continuous stripper
US5829697A (en) 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
DE19545087C2 (de) * 1995-12-04 2003-06-12 Hermann Schwelling Klein-Aktenvernichter
CN2267860Y (zh) * 1996-01-22 1997-11-19 至法实业有限公司 碎纸机
DE19610048A1 (de) * 1996-03-14 1997-09-18 Schleicher & Co Int Schriftgutvernichter
DE19712661C2 (de) * 1997-03-26 2003-04-10 Schleicher & Co Int Ag Abstreifer für ein Schneidwerk eines Dokumentenvernichters
US5961059A (en) * 1997-04-30 1999-10-05 Fellowes Manufacturing Company Support for drive system in a paper shredder
US5826809A (en) * 1997-04-30 1998-10-27 Fellowes Manufacturing Company Support for cutting cylinders in a paper shredder
WO1999001223A2 (de) * 1997-07-04 1999-01-14 WILHELM DAHLE BüRO-TECHNIK GMBH & CO. KG Dokumentenvernichter
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
USD412716S (en) 1998-06-30 1999-08-10 Fellowes Manufacturing Company Paper shredder
USD410246S (en) 1998-09-15 1999-05-25 General Binding Corporation Paper shredder
US6241170B1 (en) * 2000-01-21 2001-06-05 Cd Systems Inc. Industrial shredders and novel components therefor
USD444809S1 (en) 2000-05-31 2001-07-10 Frank Chang Shredder
USD481416S1 (en) 2003-03-11 2003-10-28 Frank Chang Shredder
US20100282885A1 (en) * 2007-04-27 2010-11-11 Jesus Perez Santafe Grinding container for the selective collection of solid urban waste and various special adaptations for each type of waste, including a domestic grinding container
US7753295B1 (en) * 2007-08-27 2010-07-13 Emily Lo Paper shredder which prevents cutting fingers
US7601052B1 (en) * 2008-03-31 2009-10-13 Key Systems, Inc. Key destroyer
US20100176231A1 (en) * 2009-01-14 2010-07-15 Michilin Prosperity Co., Ltd. Package-type break-preventing device for rotary shafts of a shredder
DE202009013428U1 (de) * 2009-10-05 2011-03-03 Schwelling, Hermann Aktenvernichter mit Metallerkennung
US20130214072A1 (en) * 2012-02-20 2013-08-22 Tex Year Industries Inc. Rotary cutter door device for paper shredders
WO2014113589A1 (en) * 2013-01-17 2014-07-24 Merit Medical Systems, Inc. Apparatuses and kits for grinding or cutting surgical foam and methods related thereto
DE102014016920A1 (de) * 2014-11-17 2016-05-19 Giesecke & Devrient Gmbh Vorrichtung zum Schreddern von Wertdokumenten
US10537896B2 (en) * 2016-07-05 2020-01-21 Aurora Office Equipment Co., Ltd. Shanghai Autofeed paper shredder with clip and staple removal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018392A (en) * 1975-12-22 1977-04-19 Wagner John W Shredding machine
EP0010681B1 (de) * 1978-10-19 1982-04-14 Günter Trautmann Vorrichtung zum Zerschneiden oder Zerkleinern von Papier, Karton, Mikrofilmen od. dgl
GB2096919B (en) * 1981-03-11 1984-12-05 Matsushita Electric Industrial Co Ltd Shredder
DE3616554C2 (de) * 1986-05-16 1995-05-24 Schleicher Co Feinwerktech Messerwalzen-Abstreifvorrichtung für Aktenvernichter oder dgl.
DE4003222C1 (enExample) * 1990-02-03 1991-04-18 Pbs-Servicegesellschaft Mbh & Co. Kg, 3000 Hannover, De
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine

Also Published As

Publication number Publication date
DK0502355T3 (da) 1995-11-06
ATE124296T1 (de) 1995-07-15
GR3017227T3 (en) 1995-11-30
US5400978A (en) 1995-03-28
DE4106792C1 (enExample) 1992-08-27
ES2075492T3 (es) 1995-10-01
EP0502355A1 (de) 1992-09-09
DE59202644D1 (de) 1995-08-03

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