US3650170A - Cutting device of a copy machine - Google Patents

Cutting device of a copy machine Download PDF

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Publication number
US3650170A
US3650170A US76443A US3650170DA US3650170A US 3650170 A US3650170 A US 3650170A US 76443 A US76443 A US 76443A US 3650170D A US3650170D A US 3650170DA US 3650170 A US3650170 A US 3650170A
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US
United States
Prior art keywords
rotary
cutting blade
cutting device
cutter
blade
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
US76443A
Other languages
English (en)
Inventor
Satoshi Hisabayashi
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co Ltd
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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Application granted granted Critical
Publication of US3650170A publication Critical patent/US3650170A/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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • B26D1/385—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
    • 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
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4847—With cooperating stationary tool
    • 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
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8776—Constantly urged tool or tool support [e.g., spring biased]
    • Y10T83/8785—Through return [noncutting] stroke
    • Y10T83/8786—Oscillating tool

Definitions

  • a pin shaft In a conventional cutting device of a copy machine, wherein a rotary cutter is actuated by way of a rotary solenoid, a pin shaft, axially projected from the rotary cutter, engages with a slot formed in a shaft of the rotary solenoid so that the pin shaft is reciprocally turned in accordance with the reciprocal turning motions of the rotary solenoid.
  • the principle object of the present invention is to eliminate the above-mentioned drawback.
  • a rotary cutter blade is always restricted in its free turning motion about its turning axis by means of a counter mechanism such as a spring means so that the rotary cutter is provided with a spring resistance against a free turning motion thereof, thereby any play between the pin shaft and edge of the slot is always eliminated.
  • the intervened space between the knife edges of the stationary knife and the rotary cutter blade is maintained constant so that the intervened space is sufficiently large to allow free feeding of the paper when a fresh piece of paper is fed into the cutting device.
  • a certain modified cutter which functions a combined cutting action with shear, is preferably applied.
  • FIG. 1 is a schematic side view of a rotary cutter of a copy machine according to the present invention
  • FIG. 2 is a schematic section view of a portion of the rotary cutter, taken along line IIII in FIG. 1,
  • FIG. 3 is a schematic section view of an engaging portion of the cutter with a rotary solenoid, taken along line III-III in FIG. 1,
  • FIG. 4 is a schematic side view of a right end portion of the rotary cutter shown in FIG. 1,
  • FIGS. 5A, 5B, 5C are schematic section views of an engaging portion of the cutter with a rotary solenoid, utilized for a conventional rotary cutter,
  • FIG. 6 is a schematic sectional view of a portion of the rotary cutter wherein the engaging condition with the rotary solenoid is shown in FIG. 5,
  • FIG. 7 is a schematic side view of another embodiment of a counter mechanism according to the present invention.
  • FIG. 8A is a side view of another embodiment of rotary cutter according to the present invention.
  • FIG. 8B is a sectional view of the rotary cutter, taken along line VIIVII in FIG. 8A,
  • FIG. 9 is a sectional view of another embodiment of engaging portions of the rotary solenoid and the rotary cutter, taken along axial direction thereof, according to the present inventron,
  • FIG. 10 is a perspective view of an engaging portion of the rotary solenoid, shown in FIG. 9,
  • FIG. 11 is a perspective view of an engaging portion of the rotary cutter, shown in FIG. 9,
  • FIG. 12 is a perspective view of a stationary can shown in FIG. 9.
  • a counter mechanism such as a spring means as shown in FIG. 1, is omitted. Therefore, the mechanism and function of the rotary cutter applied to the conventional copy machine can be illustrated by using the drawing shown in FIG. 1, if the spring means composed of elements 8, 9 and 9a is considered as omitted.
  • a rotary cutter l is engaged with the rotary solenoid 2 in such a way that a pin shaft 6 laterally secured to a shaft 5 of the rotary cutter l engages a slot 7 formed in a shaft 4 of the rotary solenoid 2.
  • the rotary solenoid 2 when the rotary solenoid 2 is energized by electric power, the rotary solenoid 2 is actuated to turn by way of their connection 3 which is composed of the pin shaft 6 and the slot 7.
  • the rotary solenoid 2 can be displaced forward or rearward so that the engagement of the pin shaft 4 with the slot 7 is made or released. Since, the lateral space of the slot 7 is larger than the cross-sectional diameter of the pin shaft 6, there is so-called play between the edges of the slot 7 and the pin shaft 6, as shown in FIG. 5A. Therefore, the pin shaft 6 is turned by the shaft 4 in a contacting condition as shown in FIG. 58 when the rotary solenoid 2 is actuated to operate the cutter 1.
  • a rotary cutter according to the present invention comprises a rotary cutter blade 1 turnably supported by a pair of bearings 15a and 15b, and a stational knife 11 closely disposed above the rotary cutter blade 1, and the rotary solenoid 2 for turning the rotary cutter blade 1.
  • the cutter blade I is provided with the axial projection 5 which supports a pin shaft 6.
  • a pair of side shafts 1a, lb are turnably supported by a pair of bearings 15a and 15b, respectively.
  • the pin shaft 6 extends laterally from the axial projection 5 at an outside of the bearing 15a.
  • the rotary solenoid 2 is provided with an inward projection 4 provided with a lateral slot 7 which engages with the pin shaft 6. This engagement can be released by displacing the rotary solenoid 2 toward outside of the cutting device 6. This direction is shown by an arrow in FIG. 1.
  • a grooved pulley 9 is secured on the shaft 1b outside of the bearing 15b.
  • a spring 8 is disposed under the pulley 9 in such a way that an end thereof is connected to the pulley by way of a string 9a and another end thereof is fixed to a portion of the machine frame so that the rotary cutter blade 1 is always turned counterclockwise (in FIG. 4).
  • the space distance between the edge point a of the stational knife 11 and the edge point b" of the rotary cutter blade 1 is kept at a predetermined size when a leading end of the paper 14 is fed into the space by the feed rollers 12 and 13.
  • the size of this space is sufficiently large to allow free passing of paper 14 when the paper 14 is fed from the feed rollers 12, 13.
  • the rotary cutter blade 1 is provided with reciprocal turning motion by the'rotary solenoid 2, in other words, the cutter blade 1 is turned counterclockwise (in FIG. 2) after completion of one step of feeding the paper through the above-mentioned space so that a piece of paper is cut from the continuous paper 14 by the cutting action created with the knife edges of the stational knife '11 and the rotary cutter blade 1.
  • the feed rollers 12, 13 are rotated intermittently so as to feed the continuous paper 14.
  • a length of feeding paper by one step of feeding can be adjusted in accordance with requirement by an adjusting means (not shown). It is also required to use the spring 8 having a suitable resilient force for eliminating only the play between the edges of the slot 7 and the pin shaft 6 so that the turning torque of the cutting blade 1 created by the rotary solenoid 2 is not weakened. Since the play between the above-mentioned two edges of slot 7 and the pin shaft 6 can be completely eliminated, the turning torque of the cutter blade 1 at the time g of the cutting operation is rather increased in comparison with the cutting device which omits the above-mentioned spring means. Consequently, the power consumption of the rotary solenoid 2 can be reduced so that temperature elevation of the solenoid 2, which is created by sequential cutting operations, can be prevented.
  • a spring means comprising the pulley 9 and the spring 8 and a string 9a connecting the pulley 9 with the spring 8 is used.
  • another counter mechanism which eliminates the play of engagement of the rotary cutting blade 1 with the rotary solenoid can be applied instead of the above-mentioned spring means.
  • FIG. 7 another embodiment of the counter mechanism is shown.
  • the string 9a is connected to a thin shaft 15 which is connected to a dead weight 16 having a circular cross section.
  • the motion of the thin shaft 15 is guided by a guide member 18.
  • the dead weight 16 is encased in a cylindrical casing 17 wherein the dead weight 16 can be displaced like a piston.
  • a pair of small apertures 19 and 20 are formed at an upper and lower position of the cylindrical casing 17 so that air in the upper or lower space in the casing 17 does not disturb the upward or downward motion of the dead weight 16, but eliminates jumping thereof.
  • the cutting edge of the rotary cutter l is modified as follows; that is the main portion of the rotary cutter l is composed of a stem shaft 1a and a cutting blade lb radially projected from the circumferential surface of the stem shaft 1a in such a way that a line of the cutting edge of the blade lb forms a half of a unit helical line so that the contacting point of the edge of the stational cutter 11 (FIGS.
  • a modified rotary cutter provided with a particular driving means can be used.
  • a drive means for turning the retary cutter simultaneously with reciprocal lateral movement along an axis thereof can be used.
  • a coupling means of the rotary cutter comprises a stationary cam 20 provided with an aperture 21 for rotatably supporting the shaft of the rotary solenoid 2 and a ring shaped cam surface 23 projected from a side surface thereof, and a cylindrical attachment 24 rigidly secured on the bearing portion 5 of the rotary cutter 1.
  • the attachment 24 tumably supports a ball 26 in a spherical recess formed at a side portion thereof.
  • a ring retainer 27 engages with an edge portion of the recess so as to prevent the escape of the ball 26 from the recess.
  • the pin shaft 6 is slidably engaged with a horizontal slot 7 formed at the end portion of the shaft 4 and the ball 26 is always urged to the surface of the ring shaped cam 22 by a spring (not shown). Consequently, the rotary cutter 1 is driven by the turning motion of the rotary solenoid 2 by way of the sliding contact of the pin shaft 6 with the slot 7 and reciprocally moved along its axis by means of sliding contact of the ball 26 with the surface of the cam 22.
  • the profile of the cam 22 is so formed that the above-mentioned reciprocal movement of the rotary cutter 1 along its axis is completed once 360 turning of the shaft 4 of the rotary solenoid 2.
  • the shape of the cutting edge of the rotary cutter 1 shown in FIG. 1 or 8A can be used to attain combined cutting action with shear.
  • a cutting device of a copy machine provided with a rotary cutting blade and a stationary knife closely disposed above said rotary cutter and a rotary solenoid for actuating said rotary cutting blade
  • an improvement comprising a counter mechanism connected to a free axial end of said rotary cutting blade so that an engaging element formed on the other axial end of said rotary cutting blade always directly follows a reciprocal turning motion of an engaging element of said rotary solenoid without play.
  • An improved cutting device comprising a spring means resiliently connected to said free axial end of said rotary cutting blade with a part of a machine frame.
  • said counter mechanism comprises a dead weight which is pneumatically supported in an air cylinder, and is connected to a string connected to a pulley secured on said free axial end of said cutting blade.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Details Of Cutting Devices (AREA)
  • Handling Of Sheets (AREA)
US76443A 1970-04-15 1970-09-29 Cutting device of a copy machine Expired - Lifetime US3650170A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970035712U JPS4939257Y1 (nl) 1970-04-15 1970-04-15

Publications (1)

Publication Number Publication Date
US3650170A true US3650170A (en) 1972-03-21

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ID=12449459

Family Applications (1)

Application Number Title Priority Date Filing Date
US76443A Expired - Lifetime US3650170A (en) 1970-04-15 1970-09-29 Cutting device of a copy machine

Country Status (4)

Country Link
US (1) US3650170A (nl)
JP (1) JPS4939257Y1 (nl)
DE (1) DE2117966A1 (nl)
GB (1) GB1327076A (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5690009A (en) * 1995-01-11 1997-11-25 Mita Industrial Co., Ltd. Roll sheet cutter mechanism for use in image forming apparatus
AU2007202431B2 (en) * 2006-10-10 2012-06-14 Chan Li Machinery Co., Ltd. Tissue Paper Cutting Mechanism Having Upper Knife with Variable Spiral Curve Angle and Upper Knife Structure Therefor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK155240C (da) * 1986-05-02 1989-07-17 Eskofot As Filmskaereindretning
US7752949B2 (en) 2006-09-28 2010-07-13 Chan Li Machinery Co., Ltd. Tissue paper cutting mechanism having upper knife arm with variable spiral curve angle and upper knife structure therefor
EP2095917B1 (en) * 2008-02-27 2012-06-20 Chan Li Machinery Co., Ltd. Tissue paper cutting mechanism having upper knife with variable spiral curve angle and upper knife structure therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134310A (en) * 1935-10-01 1938-10-25 Zellerbach Paper Company Sheet cutting and paneling machine
US2372020A (en) * 1942-02-17 1945-03-20 Lynch Mfg Corp Wrapping paper cutting mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134310A (en) * 1935-10-01 1938-10-25 Zellerbach Paper Company Sheet cutting and paneling machine
US2372020A (en) * 1942-02-17 1945-03-20 Lynch Mfg Corp Wrapping paper cutting mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5690009A (en) * 1995-01-11 1997-11-25 Mita Industrial Co., Ltd. Roll sheet cutter mechanism for use in image forming apparatus
AU2007202431B2 (en) * 2006-10-10 2012-06-14 Chan Li Machinery Co., Ltd. Tissue Paper Cutting Mechanism Having Upper Knife with Variable Spiral Curve Angle and Upper Knife Structure Therefor

Also Published As

Publication number Publication date
DE2117966A1 (de) 1971-12-23
JPS4939257Y1 (nl) 1974-10-28
GB1327076A (en) 1973-08-15

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