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
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/04—Safety devices
• • 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
• • 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
  • B02C2018/164—Prevention of jamming and/or overload
• • 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
  • B02C2018/168—User safety devices or measures in shredders

Definitions

• the invention relates to a document shredder with a
• Safety device the hand engagement by the feed channel for sheet-shaped, z.
• As paper, or the like material for cutting in operation prevents, in particular the intervention by not in the operation of shredders instructed persons such. As children or people of the public s traffic.
• document shredders are known in the inlet region for the material to be shredded a flap is arranged, which narrows the feed channel except for a narrow inlet path and thus prevents the risk of injury by intervention to the cutting unit. Due to the conical shape of the resulting from the flap
• Blade may, however, come to jamming thicker material to be cut, such as. B. in the supply of thicker cardboard or a number of sheets which is greater than the maximum number of sheets specified in the instruction manual for the shredder concerned, since this can be easily introduced at the beginning of the conical inlet runway, and jammed in the rear, tapered area. Increased workload, injuries to the operator when forcibly pulling out the jammed as well as permanent deformations in the feed area can be disadvantageous consequences.
• the drive or its control unit is assigned a thermally acting securing element, which stops the drive of the cutting unit when a setpoint size is exceeded.
• the object of the invention is therefore to develop a document shredder said type so that it meets the increased safety requirements with respect to the avoidance of said malfunction as well as the prevention of interference with the current cutting mechanism, even when passing through the Feeding channel, at the same time the cost of a shredder should remain relatively low.
• the invention relates to a document shredder with a housing, preferably a two-part, which is composed of a lower housing part and a housing upper part.
• a cutting unit is arranged together with the drive unit and control unit.
• Above the cutting unit is a feed channel for substantially sheet-shaped material.
• the feed channel has an overhead inlet opening, which is embedded in the top of the housing or is integrated in a provided in the top of the housing recess or recess.
• the feed channel ends in its outlet opening, which is aligned with the material intake gap of the cutting mechanism.
• the feed channel consists of two narrow walls which are at a distance from each other, as well as a guide wall and a substantially parallel counterwall spaced from the latter.
• This document shredder is placed or attached to the lower edge of its upper housing part on a frame, preferably a cabinet-like frame.
• the lower housing part of his housing protrudes into the frame.
• the collection bin for collecting the shredded material is positioned in the rack.
• the collecting container can be a flexible or a container with solid walls.
• the shredder can also be placed directly removable on a collecting container.
• Feed channel in reaching portions of the probe element to each other is smaller than the thickness of a finger of a "standard hand", this standard hand is given by national standards institutes.
• this standard hand is given by national standards institutes.
• the above-described new probe element acts additionally as a safety device.
• this probe element can be used so that when loading the feed channel with a number of sheets that is greater than the specified in the device parameters sheet number, also a shutdown of the rotating parts of the cutting unit is done, so that an overload of the cutting mechanism or the drive of the cutting unit is prevented from the outset.
• the new safety device so the new probe element and the switch is provided in a first desired position for switching on the drive and when reaching or exceeding a second target position, the shutdown of the drive Cutting mechanism causes.
• the probe element is rotatable.
• the Tastelement itself be a rotationally symmetric component, which has a plurality of radially directed recesses; so to speak in plan view has a comb-like shape.
• this rotationally symmetrical probe element is mounted with its axis of rotation behind the respective channel wall, preferably the counter wall, such that a region of the quasi-protruding discs protrudes through one of the apertures provided in the opposite wall, into the feed channel.
• the probe element may also be designed in a further embodiment, however, that on an axis a plurality of discs are rotatably mounted, which are each spaced by a spacer to each other.
• the probe element consists of a non-rotationally symmetrical part, in which, however, slightly protruding rotating elements are provided on the guided through the apertures, extending into the feed channel portion of the probe element.
• a transmission unit or - is arranged element for forwarding a change in location of the probe element to the switch.
• a lever mounted pivotably about a lathe axis is arranged there.
• the axis of rotation of the lever on which the probe element is mounted with respect to its contact with the switch arranged so that the deflection of the probe element is transmitted from a predetermined target position with a reduction to the moving part of the switch.
• This reduction is preferably in the range 1, 5: 1 to 20: 1.
• the lever for positioning in a desired position is connected to a force accumulator.
• Rotary axis of the lever is arranged above the probe element or below the probe element.
• the lever is designed as a straight line, but may - according to the free spaces present in the housing - also be an arcuate part, preferably have an L-shaped form.
• the transmission element or parts of a transmission unit pivots, not about an axis, but the movable element of the transfer unit is guided on an inclined plane.
• the rotatable areas / sections of the probe are driven, wherein the drive of the rotatable areas / sections of the probe is synchronous with the Drehwegung of the cutting rollers.
• a component or an assembly for a shredder is created, which can be used in shredders of different performance classes.
• a positive effect is additionally brought about for the production process of shredders by increasing the degree of repetition.
• Said assembly can thus be used in a shredder with a maximum throughput of 7 sheets, but also in a shredder, due to its designed drive power an intended cutting performance of z. B. has 17 sheets.
• Show 1 is a perspective view of a document shredder with a cabinet-like base
• Fig. 2 shows a cross section through the shredder according to FIG. 1
• Fig. 3 is a plan view of the probe element of the new safety device.
• the frame 4 is designed as a cabinet-like base.
• the front side 4a of the cabinet-like frame 4 is at the same time the door 4b.
• the interior of the cabinet-like frame 4 of the collecting container for collecting the crushed material is positioned.
• Shredder 1 is placed with its upper housing part 2a on the cabinet-like frame 4; the lower housing part 2b is located inside the side walls of the frame 4.
• the two counter rotating cutting rollers 9a, 9b having cutting 9 is arranged together with the document shredder 1 belonging - not shown here - at least one drive unit and a control unit, by means of which the cutting unit 9 is put into operation or out of order.
• a feed channel 5, in particular in the housing upper part 2a, is arranged for in particular sheet-shaped material.
• This supply channel 5 is - see Figure 3 - formed by two spaced apart narrow walls 5a, 5d and a guide wall 5b and a spaced opposite opposing wall 5c, wherein the feed channel 5 itself preferably integrally formed and in particular integrated part of the upper housing part 2a is.
• the inlet opening 7 of the feed channel 5 breaks through the upper side of the upper housing part 2a and is integrated in a housing recess or recess provided in the upper side of the upper housing part 2a.
• the feed channel 5 terminates in an outlet opening 8, which is arranged corresponding to the material feed-in gap 9c of the cutting unit 9.
• the guide wall 5b and the oppositely spaced opposite wall 5c extend conically towards the outlet opening 8.
• an optical sensor 1 1 is arranged, which gives a signal for switching on the cutting unit 9 upon insertion of a material to be cut into the feed channel 5.
• a plurality of openings 5e are distributed over the entire width of the feed channel 5 distributed. Through these openings 5e pass through portions 12a of a probe element 12 into the feed channel 5, see Figures 2 and 3.
• the remaining distance, the Passage "D", between the sections 12a of the probe element 12 and the opposite wall, here the guide wall 5b, is smaller than the smallest channel width "B" of the feed channel 5 in the region of its outlet opening 8.
• Tastelementes 12 to each other is not greater than the finger thickness of the front already mentioned "standard hand", the same applies to the distance A2 between the respective laterally last section 12a of the probe element 12 and the respective lateral wall 5a and 5d of the feed channel 5, so over the entire Length of the feed channel 5 no area is present through which a child could stick his finger without the safety device is actuated.
• probe element 12 is mounted on at least one, preferably two levers 16 on both sides; preferably rotatably mounted 13.
• the sections 12a of the feeler element 12 projecting through the openings 5e rotate in the feed direction, so that no additional frictional effects occur when the material is introduced.
• the corresponding sections 12a of the feeler element 12 move in reversing the cutting unit 9 in the opposite direction and offer no additional friction effects here.
• the lever 16 is fixed by means of a force storage device, here with one attached to a base 19 Tension spring 18, positioned on a stop 6.
• a switch 15 preferably a micro-button, arranged so that upon deflection of the lever 16 - ie a change in location with respect to the desired position - according to directional arrow 14, the power supply to drive the cutting unit is interrupted or from the switch 15, a control signal is sent to the control unit of the shredder for switching off the cutting unit.
• the response point of the micro-probe is variably adjustable, whereby the passage "D" can be assigned a tolerance range. In order to keep the amount of the passage "D" variable, it is on the other hand - not shown here - possible to perform the position of the stop 6 with respect to the lever 16 variably adjustable.
• the upper portion of the opposing wall 5c is provided with the reference numeral 5c 'and this portion has a different hatching.
• this subarea of the counterwall 5c can be designed very differently, depending on the intended field of use of the shredder concerned.
• the obliquely vertically extending portion of this component can be curved more be curved or polygonal, but can also take an almost vertical position.
• the color scheme compared to the other areas of the housing top be different, so purely referenced with the coloring on the present here at the document shredder dangerous area.

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• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Crushing And Pulverization Processes (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39734152

Family Applications (1)

Country Status (4)

Cited By (1)

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Citations (3)

Family Cites Families (4)

• 2007
  • 2007-04-28 DE DE102007020222.0A patent/DE102007020222B4/de not_active Expired - Fee Related
• 2008
  • 2008-04-26 EP EP08749172.6A patent/EP2152422B1/de not_active Not-in-force
  • 2008-04-26 WO PCT/EP2008/003398 patent/WO2008131943A1/de active Application Filing
  • 2008-04-26 PL PL08749172T patent/PL2152422T3/pl unknown

Patent Citations (3)

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