US3552745A - Rotary transfer mechanism for printing machines - Google Patents

Rotary transfer mechanism for printing machines Download PDF

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Publication number
US3552745A
US3552745A US754038A US3552745DA US3552745A US 3552745 A US3552745 A US 3552745A US 754038 A US754038 A US 754038A US 3552745D A US3552745D A US 3552745DA US 3552745 A US3552745 A US 3552745A
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US
United States
Prior art keywords
swingable
grippers
cam
transfer mechanism
rotary
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
US754038A
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English (en)
Inventor
Josef Jurny
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.)
Adamovske Strojirny AS
Original Assignee
Adamovske Strojirny AS
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 Adamovske Strojirny AS filed Critical Adamovske Strojirny AS
Application granted granted Critical
Publication of US3552745A publication Critical patent/US3552745A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B65H5/10—Reciprocating or oscillating grippers, e.g. suction or gripper tables

Definitions

  • the present invention relates to a rotary transfer mechanism constituting a device for the transfer of paper sheet into the grippers of a printing roller in rotary sheet printing machines.
  • One of the known devices comprises a swingable transfer mechanism with grippers which, having transferred the sheet to the printing roller, return to their original position along a different and slightly elevated path, in order to permit the return movement of the swingable grippers without interference with the passage of the preceding paper sheet over the feeder table.
  • This operation is performed by means of rotary excentric bushings, housing the main shaft of the swingable grippers.
  • This coupled with an independent control of the transfer mechanism renders the respective mechanism highly intricate.
  • the latter have to be accelerated from their position of rest when gripping the sheet, to the peripheral speed of the printing roller, then decelerated until they are completely stopped.
  • the present invention aims at removing the aforementioned disadvantages of the known rotary transfer mechanisms.
  • the invention provides a swingable axle carrying, on the one hand pivotally mounted sleeves to each of which is fixed a bar with an abutment plate and, on the other hand, fixed fingers adapted to bear on abutment pins fitted in the sleeves and bearing on set screws, which are arranged in holder secured to carrier discs supporting the axle.
  • Fixed to the swingable axle is a control lever, provided with a roller adapted to travel in the groove of a cam and along a track provided on a guide member placed in a slot of said cam.
  • the guide member is pivotally mounted on a pin fixed to one end of a bent lever.
  • This bent lever rotatably mounted on a pivot fixed in the sidewall of the machine, is provided at one end with a control screw and with a groove for a safety screw, its other end carrying an eccentric pivot with a follower.
  • FIG. 1 is an elevation, partially in section, of the transfer mechanism, the grippers assuming a slightly deflected position
  • FIG. 2 is a side view, partly in section taken along the line AA and showing the parts in a position marked I in FIG. 5, and illustrates the position at the moment when the sheet is picked up and the transfer movement begins,
  • FIG. 3 is a partial section along the line AA from FIG. 1 and represents the position II of the parts, as shown in FIG. 5, and illustrates the tiltable grippers with the abutments prior to leaving the feed plane,
  • FIG. 4 is a partial section along the line AA from FIG. 1 at the moment when the grippers are opened.
  • FIG. 5 shows the device in a section along the line BB from FIG. 1.
  • the rotary transfer mechanism comprises a main shaft 1 journalled in the sidewalls 20 of a printing machine. Rigidly secured to the main shaft 1 are spaced carrier discs 2, on which a swingable axle 3 is mounted for rotation. As seen in the figure, the axle 3 is parallel to but offset from the axis of the shaft 1. Rockably fitted on the swingable axle 3 are spaced sleeves supporting a bar 9 on which abutment plates 8 are located. Firmly secured to the swingable axle 3 are fingers 13 and holders 5, which are provided with screws 6, springs 7 and swingably mounted grippers 4.
  • a control lever 21 Fixed to one end of the swingable axle 3 is a control lever 21 carrying a roller 22 which is journalled on a pin 23 and with a tensile spring 36, suspended on a stud 35 and on a suspension pin 37, which is secured to the carrier disc 2.
  • a control lever 21 Fixed to one end of the swingable axle 3 is a control lever 21 carrying a roller 22 which is journalled on a pin 23 and with a tensile spring 36, suspended on a stud 35 and on a suspension pin 37, which is secured to the carrier disc 2.
  • Each of the sleeves 10 accommodate abutment pins 12, the outer sides of which are engaged by set screws housed in holders 14. Springs 11 are fitted in the sleeves 10 resting against the main shaft 1.
  • the swingable axle 3 supports the control lever 21 with the roller 22, so that it travels in the groove of a cam 24.
  • a guide member 27 extends into the cam 24 and is rockably mounted on a pin 28, secured in one arm of a bent lever 25.
  • the guide member 27 is further secured in position by a safety screw 29, screwed in said arm of the bent lever 25 and passing through a slot, provided in the guide member 27, so as to allow the adjustment of its position by tilting the guide member 27 about the pin 28.
  • the arm of the bent lever 25 houses further a control screw 30.
  • the bent lever 25 is journalled on a pivot 26 rigidly secured in the sidewall of the printing machine.
  • One end of the bent lever carries an eccentric pivot 32 on which a follower 31 is mounted for rotation, the roller being pressed by a spring 34 against a control cam plate 33.
  • the paper sheets are supplied along a feed table 16 and are held in position by pressure belts 18.
  • Mounted opposite the discharge end of the feed table 16 is a rockable front gauge 17.
  • the rotary transfer mechanism embodying the invention operates as follows:
  • the bent lever 25 (FIG. 5) is shifted by means of the follower 31 during rotation of the cam plate 33 from a position marked III to a position I.
  • the guide member 27 with the aid of the roller 22 and control lever 21 causes the swingable axis 3 to turn in such a way, that the grippers 4, under the action of the pressure spring 7, press the edge of the prepared sheet against the abutment plates 8.
  • a gap remains between the fingers 13 and the abutment 12,. The gap secures the engagement of the abutment pin 12 with the set screw 15 so as to ensure the basic position of the bar 9.
  • the front gauge 17 is deflected and the rotary transfer mechanisms start an accelerating movement.
  • the roller 22 passes smoothly from the operative surface of the guide member 27 in position I to the groove, positioned in the cam 24 at the point where the curvature of the groove forms a wave-line, causing the control lever 21 and thus the swingable axle 3 to turn and open the grippers 4, when transferring the sheet to the printing roller 19.
  • the smooth blending of the operative surface of the guide member 27, when in position 1, into the groove of the cam 24 is adjusted by means of the eccentric pivot 32.
  • the spiral shape of the groove in the cam 24 causes during further movement of the control lever 21 another partial rotation of the swingable axle 3, in such a way that the grippers 4 are reclosed.
  • the continuing rotation of the swingable axis 3 causes the finger 13 to abut against the abutting pins 12.
  • the drive of the main shaft 1 and consequently also of the transfer mechanisms is derived from a not-illustrated mechanism consisting of cam discs, rollers and toothed segments, which transmit the movement from the printing roller.
  • a not-illustrated mechanism consisting of cam discs, rollers and toothed segments, which transmit the movement from the printing roller.
  • the gap between the abutment plates 8 may be adjusted by means of the set screws 15 provided with a scale, so as to alter the distance of the abutment plates 8 from the axis of the main shaft 1.
  • a rotary transfer mechanism comprising a machine frame, a main shaft mounted for rotation in said machine frame, means for imparting rotary movement to the main shaft, spaced carrier discs firmly secured to the main shaft, a swingable axle parallel to said shaft and mounted for rotary movement in said carrier discs, means for imparting partial rotary movement to the swingable axle in relation to the carrier discs, spaced sleeves mounted for rocking movement on the swingable axle, a supporting bar having an abutment plate fixed to each of said sleeves for rocking movement therewith, an abutment pin fixedly mounted in each of said sleeve, a pair of spaced fingers rigidly fixed to the swingable axle and adapted to engage each of the abutment pins respectively, screw means carried by said carrier discs and adapted to engage each of said abutment pins respectively.
  • a rotary transfer mechanism comprising a machine frame, a main shaft mounted for rotation in said machine frame, means for imparting rotary movement to the main shaft, spaced carrier discs firmly secured to the main shaft, a swingable axle parallel to said shaft and mounted for rotary movement in said carrier discs, means for imparting partial rotary movement to the swingable axle in relation to the carrier discs, spaced sleeves mounted for rocking movement on the swingable axle, a supporting bar having an abutment plate fixed to each of said sleeves for rocking movement therewith, an abutment pin fixedly mounted in each of said sleeve, a pair of spaced fingers rigidly fixed to the swingable axle and adapted to engage each of the abutment pins respectively, screw means carried by said carrier discs and adapted to engage each of said abutment pins respectively, a control lever is fixed to the swingable axle carrying a roller and includes a groove

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
US754038A 1967-08-28 1968-08-20 Rotary transfer mechanism for printing machines Expired - Lifetime US3552745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS609967 1967-08-28

Publications (1)

Publication Number Publication Date
US3552745A true US3552745A (en) 1971-01-05

Family

ID=5407236

Family Applications (1)

Application Number Title Priority Date Filing Date
US754038A Expired - Lifetime US3552745A (en) 1967-08-28 1968-08-20 Rotary transfer mechanism for printing machines

Country Status (5)

Country Link
US (1) US3552745A (enrdf_load_stackoverflow)
DE (1) DE1786143C3 (enrdf_load_stackoverflow)
FR (1) FR1577820A (enrdf_load_stackoverflow)
GB (1) GB1232403A (enrdf_load_stackoverflow)
SE (1) SE348436B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080128982A1 (en) * 2004-11-26 2008-06-05 Jorg Eidam Gripper System for a Cylinder of a Sheet-Fed Printing Press Which Guides Sheets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS176754B1 (enrdf_load_stackoverflow) * 1975-04-30 1977-06-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080128982A1 (en) * 2004-11-26 2008-06-05 Jorg Eidam Gripper System for a Cylinder of a Sheet-Fed Printing Press Which Guides Sheets

Also Published As

Publication number Publication date
FR1577820A (enrdf_load_stackoverflow) 1969-08-08
SE348436B (enrdf_load_stackoverflow) 1972-09-04
DE1786143C3 (de) 1973-09-20
DE1786143B2 (de) 1973-03-08
DE1786143A1 (de) 1972-01-27
GB1232403A (enrdf_load_stackoverflow) 1971-05-19

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