EP0723842A1 - Dispositif pour la coupe de matériau en feuille - Google Patents

Dispositif pour la coupe de matériau en feuille Download PDF

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Publication number
EP0723842A1
EP0723842A1 EP95119684A EP95119684A EP0723842A1 EP 0723842 A1 EP0723842 A1 EP 0723842A1 EP 95119684 A EP95119684 A EP 95119684A EP 95119684 A EP95119684 A EP 95119684A EP 0723842 A1 EP0723842 A1 EP 0723842A1
Authority
EP
European Patent Office
Prior art keywords
return spring
locking element
press beam
press
angle
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
EP95119684A
Other languages
German (de)
English (en)
Other versions
EP0723842B1 (fr
Inventor
Helmut Gross
Adolf Rasch
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.)
Adolf Mohr Maschinenfabrik GmbH and Co KG
Original Assignee
Adolf Mohr Maschinenfabrik GmbH and Co KG
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 Adolf Mohr Maschinenfabrik GmbH and Co KG filed Critical Adolf Mohr Maschinenfabrik GmbH and Co KG
Publication of EP0723842A1 publication Critical patent/EP0723842A1/fr
Application granted granted Critical
Publication of EP0723842B1 publication Critical patent/EP0723842B1/fr
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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22—Safety devices specially adapted for cutting machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/01—Safety devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/566—Interrelated tool actuating means and means to actuate work immobilizer
    • Y10T83/5669—Work clamp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/7533—With biasing or counterbalancing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/7553—Including means to retain clamp jaw in position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/756—Self-locking drive means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9473—For rectilinearly reciprocating tool
    • Y10T83/9478—Tool is single element reciprocable generally perpendicularly to elongate cutting edge [e.g., shear, etc.]

Definitions

  • the invention relates to a device for cutting leafy material, with a table for receiving the material, a knife for cutting the material and a press bar that can be lowered onto the material to be cut, a drive for lowering the press bar and a return spring for lifting the press bar being provided are.
  • a device for cutting sheet-like goods with a table for receiving the goods, a knife for cutting the goods and a press bar that can be lowered onto the goods to be cut is known, for example, from EP 0 056 874 A1.
  • the pressing beam is lowered onto the material to be cut by means of a drive, while a return spring raises the pressing beam when the drive is not activated.
  • cutting devices of this type it is possible with cutting devices of this type to indicate the respective cut.
  • the operator of the device can slowly lower the press beam in the direction of the material to be cut, so that the material to be cut can be optimally aligned with respect to the cutting plane due to the proximity of the press beam to the surface of the material to be cut and the parallelism of the lower front edge of the press beam to the cutting knife.
  • the operator manipulates the stack to be cut under the press beam.
  • the pressing force of the press beam is reduced during the cut indication.
  • a safety device which locks the press beam when the return spring breaks.
  • the term locked is to be understood comprehensively.
  • the locking of the pressure beam is preferably its locking, the fixing of the pressure beam taking place mechanically after a short distance in a particularly simple manner.
  • the press beam will engage indirectly.
  • the press beam is usually lowered hydraulically, with the hydraulic system of the press beam being relieved of pressure when the press beam is raised.
  • a break in the return spring could be represented as an increase in pressure in the hydraulic system, with the result that a check valve is activated immediately, which hydraulically blocks the lowering movement of the press beam.
  • the locking of the pressure beam in the event of breakage of the return spring can be achieved in a particularly simple construction, if the safety gear has a locking element arranged in the drive train for the pressure beam, in the movement path of which a stationary stop part protrudes in the event of spring breakage. If the return spring is intact, the locking element which can be moved together with the pressure beam does not come into contact with the stop part, while the break of the return spring leads to a change in the position of the locking element, with the consequence that the stationary stop part now projects into the movement path of the locking element. As soon as the locking element contacts the stop part, the downward movement of the press beam is ended, which is thus caught in this position.
  • An advantageous design provides that the locking element is pivotally mounted in the drive train between two stops, the return spring engaging a stationary component of the cutting device and the locking element, and a release spring of lower spring force acts on the locking element against the direction of force of the return spring. With intact Return spring pulls the locking element against the one stop, the path of movement of the locking element running permanently outside the stationary stop part. If the return spring breaks and becomes ineffective, the release spring pivots the locking element against the other stop, with the stationary stop part now projecting into the path of movement of the locking element.
  • the safety gear can be arranged at any point on the drive train for the press beam and could in principle also be assigned directly to the press beam.
  • a preferred design provides, however, that the press beam is guided in a machine stand and the drive train of the press beam essentially by pull rods acting on both ends of the press beam, on the other end of the pull rods acting on the machine stand, pivotally mounted angle levers, a rod connecting the angle lever and an actual drive cooperating with one of the angle levers is formed, the return spring engaging the machine stand and the locking element mounted in the connecting rod.
  • the locking element is assigned to the connecting rod which effects the synchronism of the pressure beam and the tie rods.
  • a particularly simple design of the locking element is obtained if it is designed as an angle element which is pivotally mounted in the connecting rod in its corner region, and the return spring acts on a lever of the angle element in the region of the free lever end and the free end of the other lever of the angle element can be brought into operative connection with the stationary stop part.
  • the return spring can thus engage with a large lever arm and the other lever arm is essentially only exposed to compressive forces when the return spring breaks when it strikes the stationary stop part.
  • the release spring is expediently mounted in the connecting rod and is designed as a leg spring, one leg of which is on the connecting rod and the other leg of which is on the locking element between the pivot axis of the locking element and the point of application of the return spring.
  • the two stops of the locking element can be formed, for example, by a pin which is mounted in the connecting rod and which, at a distance from the pivot axis of the locking element, passes through an elongated hole arranged in the pivoting direction of the locking element.
  • the stationary stop part has a latching link for the engagement of the latching lever as a function of the catching position of the press beam.
  • the background is that the connecting rod mounted in the two angle levers is moved on a circular arc depending on the position of the bar, with the consequence that the locking lever also performs a corresponding movement when the return spring is not broken.
  • the latching link In order to ensure that the pressure bar locks briefly when the return spring breaks at any position, the latching link, with the large number of stop stages for the latching element, is arranged at an almost constant distance from the respective latching lever position.
  • Figure 1 illustrates the basic structure of a cutting machine for cutting sheet-like material, in one Seen plane perpendicular to the feed direction of the material to be cut or parallel to the plane of travel of the press beam and the cutting knife. Only the parts essential to the invention are shown.
  • a table 12 with a horizontally oriented table surface 13 is mounted in a machine stand 1 and serves to receive sheet-like material to be cut 2.
  • the press bar 11 can be lowered or raised in the direction of the double arrows Z, the maximum raised position of the press bar 11 being shown in FIG. 1, which shows that there is a distance between the surface of the material to be cut 2 and the lower edge 15 of the press beam 11 remains.
  • two parallel tie rods 3 act on the press beam 11, which are pivotally connected to angle levers 4, which in turn are pivotably mounted in the machine stand 1.
  • the other end of the respective angle lever 4 is pivotally connected to a connecting rod 5, which thus kinematically couples the two tie rods 3 so that a synchronization of the press beam 11 is created.
  • One of the angle levers 4 has a third arm 4a which has the function of an actuating arm, the free end of which protrudes into the actuating path of the piston 10a of a hydraulic pressure cylinder 10 which is mounted in the machine frame 1.
  • the press beam 11 is raised by relieving the pressure from the pressure cylinder 10 and on the one hand on the machine stand 1 and on the other Return spring 6 acting indirectly on the connecting rod 5 acts on the connecting rod, in the sense that the angle levers 4 are pivoted against the direction of action when the pressure system is activated.
  • the return spring 6 is designed as a spiral spring applying a tensile force.
  • the connecting rod 5 is specifically formed by two rods 5a and 5b arranged parallel to one another, which not only pivotally accommodate the free lever arms of the angle levers 4, but also a locking element designed as an angular element 8.
  • an axially secured bolt 16 passes through aligned holes in the two rods 5a and 5b and with play a bore in the angular region of the angular element 8.
  • another axially secured bolt 17 passes through the rods 5a and 5b and with play concentrically elongated hole 18 arranged in relation to the bolt 16 in the essentially vertically oriented lever 8a of the angle element 8.
  • the connecting rod 5 When moving the pressure beam 11, the connecting rod 5 describes, due to the pivotable mounting via the two angle levers 4, a movement along a circular contour with a radius which corresponds to the lever arm of the angle lever 4 between the bearing axis 23 of the respective angle lever 4 and the point of engagement on the connecting rod 5, whereby when the pressure beam 11 is in the raised position, the return spring 6 is less, but it is stronger lowered position of the press beam 11, the return spring 6 is tensioned more.
  • the return spring 6 pulls the angle element 8 into the position shown in solid lines in FIG. 2, in which the bolt 17 rests against one end of the elongated hole 18.
  • leg spring 7 causes the angle element 8 to be pivoted into the position shown in broken lines in FIG. 2, the bolt 17 now being in the area the other end of the elongated hole 18 abuts the lever 8a.
  • the figures show that the lever 8b of the angle element 8 interacts with a stop part 9 which is mounted in the machine stand 1 and is therefore stationary and which is designed as a locking link 20 on its side facing the lever 8b.
  • the contour line 21, not shown in the region of the latching link, of the latching link 20 is arranged so that when the return spring 6 acts on the angle element 8, the free end 8c is at the same small distance from the contour line 21 in every position of the press beam 11. If the return spring 6 breaks, the angle element 8 is pivoted into the dashed position via the leg spring 7, the free end 8c of the lever 8b coming against one of the steps 22 of the latching link 20 and preventing the connecting rod 5 from moving further in the direction of the arrow Y emotional.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)
  • Sawing (AREA)
EP95119684A 1995-01-26 1995-12-14 Dispositif pour la coupe de matériau en feuille Expired - Lifetime EP0723842B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19502291A DE19502291C1 (de) 1995-01-26 1995-01-26 Vorrichtung zum Schneiden von blättrigem Gut
DE19502291 1995-01-26

Publications (2)

Publication Number Publication Date
EP0723842A1 true EP0723842A1 (fr) 1996-07-31
EP0723842B1 EP0723842B1 (fr) 1998-06-10

Family

ID=7752315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95119684A Expired - Lifetime EP0723842B1 (fr) 1995-01-26 1995-12-14 Dispositif pour la coupe de matériau en feuille

Country Status (5)

Country Link
US (1) US5740710A (fr)
EP (1) EP0723842B1 (fr)
JP (1) JPH08229892A (fr)
DE (2) DE19502291C1 (fr)
ES (1) ES2118496T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243617A1 (fr) 2016-05-13 2017-11-15 Adolf Mohr Maschinenfabrik GmbH & Co. KG Decoupeuse
EP3243616A1 (fr) 2016-05-13 2017-11-15 Adolf Mohr Maschinenfabrik GmbH & Co. KG Decoupeuse

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7237465B2 (en) * 2005-02-24 2007-07-03 Chien Kai Huang Operation mechanism for pressing board of electric paper cutters
US7976001B2 (en) * 2007-12-28 2011-07-12 Seiko Ltd. Sheet stack cutter and finisher having the same
US20180118397A1 (en) * 2016-10-28 2018-05-03 Illinois Tool Works Inc. Wrapping machine printer arrangement and wrapping machine film cutter arrangement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056874A2 (fr) 1981-01-22 1982-08-04 Rolf Mohr Machine pour couper le papier etc.
DE3116292A1 (de) * 1981-04-24 1982-11-11 H. Wohlenberg KG - GmbH & Co, 3000 Hannover Vorrichtung zur herabsetzung der pressbalkendruckkraft bei einer papierschneidemaschine waehrend der schnittandeutung

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US53169A (en) * 1866-03-13 Paper-cutting machine
US368672A (en) * 1887-08-23 Leather-cutting machine
US440195A (en) * 1890-11-11 Press for bundle-wrapping
US734819A (en) * 1902-08-11 1903-07-28 George D Clapp Sole-leather-cutting machine.
US773742A (en) * 1904-04-12 1904-11-01 Child Acme Cutter And Press Co Paper-cutting machine.
US915532A (en) * 1907-10-26 1909-03-16 Daniel L Appelberry Meat-slicer.
US1091655A (en) * 1910-04-12 1914-03-31 Julius H Hampp Material-clamping mechanism for slicing-machines.
US1018380A (en) * 1911-07-08 1912-02-20 Nicholas L Minster Horseshoer's foot-vise.
US1547828A (en) * 1923-05-28 1925-07-28 John F Schroeter Automatic clamping device for paper-cutting and other machines
US1909598A (en) * 1929-02-06 1933-05-16 Racine Tool And Machine Compan Metal sawing machine
US2397896A (en) * 1944-04-21 1946-04-02 Cleveland Crane Eng Shear press
US2507581A (en) * 1945-02-26 1950-05-16 Cincinnati Milling Machine Co Safety device for broaching machines
US2506651A (en) * 1946-03-01 1950-05-09 E P Lawson Co Inc Hydraulic clamp for paper cutters
US2445248A (en) * 1946-07-22 1948-07-13 Harris Seybold Co Cutting machine
US2506436A (en) * 1948-12-08 1950-05-02 E P Lawson Co Inc Cutting knife clamp adjustment
JPS5039259B1 (fr) * 1970-09-30 1975-12-16
JPS526795B1 (fr) * 1971-02-24 1977-02-24
DE2635604C2 (de) * 1976-08-07 1985-11-07 Krug & Priester, 7460 Balingen Papierschneidmaschine
DE2727817C3 (de) * 1977-06-21 1980-02-07 Wilhelm Dahle Buero- Und Zeichengeraetefabrik, 8630 Coburg Schneideinrichtung, insbesondere Stapelschneider
US4561479A (en) * 1984-04-04 1985-12-31 Burdine Charles M Mechanical wood splitter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056874A2 (fr) 1981-01-22 1982-08-04 Rolf Mohr Machine pour couper le papier etc.
DE3116292A1 (de) * 1981-04-24 1982-11-11 H. Wohlenberg KG - GmbH & Co, 3000 Hannover Vorrichtung zur herabsetzung der pressbalkendruckkraft bei einer papierschneidemaschine waehrend der schnittandeutung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243617A1 (fr) 2016-05-13 2017-11-15 Adolf Mohr Maschinenfabrik GmbH & Co. KG Decoupeuse
EP3243616A1 (fr) 2016-05-13 2017-11-15 Adolf Mohr Maschinenfabrik GmbH & Co. KG Decoupeuse

Also Published As

Publication number Publication date
ES2118496T3 (es) 1998-09-16
DE19502291C1 (de) 1996-02-15
JPH08229892A (ja) 1996-09-10
DE59502499D1 (de) 1998-07-16
EP0723842B1 (fr) 1998-06-10
US5740710A (en) 1998-04-21

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