US3900193A - Take-off grippers in printing presses - Google Patents

Take-off grippers in printing presses Download PDF

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Publication number
US3900193A
US3900193A US448629A US44862974A US3900193A US 3900193 A US3900193 A US 3900193A US 448629 A US448629 A US 448629A US 44862974 A US44862974 A US 44862974A US 3900193 A US3900193 A US 3900193A
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US
United States
Prior art keywords
latch
arm
gripper
movement
take
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
US448629A
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English (en)
Inventor
Franz Theisz
Max Pollner
Roland Holl
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.)
Roland Offsetmaschinenfabrik Faber and Schleicher AG
Original Assignee
Roland Offsetmaschinenfabrik Faber and Schleicher AG
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 Roland Offsetmaschinenfabrik Faber and Schleicher AG filed Critical Roland Offsetmaschinenfabrik Faber and Schleicher AG
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Publication of US3900193A publication Critical patent/US3900193A/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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/08—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being oscillated in arcuate paths

Definitions

  • ABSTRACT A take-off gripper mechanism for removing sheets from a conveyor associated with a printing press and for depositing such sheets on a pile.
  • a gripper is mounted upon a pendulously pivoted gripper arm operated by a reciprocating push rod having a cam for retracting the gripper arm and a spring for advancing it in accordance with the cam profile
  • a stop which reciprocates with movement of the push rod, cooperates with a latch which is movable between latching and released positionsv
  • Means are provided for moving the latch into its latching position so that the push rod. arm and gripper are blocked in disabled position retracted from the pile of sheets and out of the way of oncoming sheets on the conveyor.
  • the latch and its stop are so constructed as to permit the stop to wipe idly by the latch into latched position. This is accomplished by camming the latch out of the way and by interposing a spring between the latch and latch operator for accommodating the camming movement 3 Claims, 2 Drawing Figures PATENTED AUG-1 9 I975 HGI SHEET 1 [1F 2 PAIENIED AUG 1 91915 SHEET E U? 2 TAKE-OFF GRIPPERS 1N PRINTING PRESSES When operating a printing press at high speed, sheets must be conveyed away in quick succession.
  • FIG. I is a diagrar. showing a sheet delivery mechanism to which the invt n is applied, with certain portions of the mechanism being schematically indicated by dot-dash lines;
  • FIG. 2 shows the invention with a portion of FIG. 1 repeated at an enlarged 'cale, and with the gripper arm in retracted position.
  • FIG. l there is shown a sheet delivering mechanism 10 having a conveyor 11 in the form of an endless chain 12.
  • the chain 12 is trained about suitable pulleys, one of which is indicated at 13 having a shaft 14 connected to a source of driving power 15.
  • grippers 16 Arranged at spaced intervals along the conveyor chain 12 are grippers 16, only one of which is shown, and the construction of which, per se, is not part of the present invention.
  • Located under the end" portion of the conveyor is means for defining a pile of sheets 17.
  • the take-off mechanism includes a take-off arm 21 which is of L shape, made up of vertical member 22 and a horizontal member 23 which are pinned together by a pin 24. Connected to the end of the horizontal member 23 is a take-off gripper 25.
  • the arm 21 is pendulously pivoted, at its upper end, for swinging movement about a stationarily mounted pin 26.
  • a reciprocating push rod 30 is provided which, at its right-hand end, has a pin connection 31 with vertical operating arm 32 which is integral with the take-off arm.
  • the push rod 30 is provided at its left-hand end with a cam follower 33 which engages a cam 34 having a shaft 35, the shaft being coupled, as indicated, to the drive mechanism l5 for movement in synchronism with the movement of the conveyor chain. While the specific profile of the cam 34 is a matter of detailed design, the cam may be understood to be of heart" shape, with the cam follower, in FIG. 1, shown occupying the low point and with the takeoff gripper 25 thus in its forwardly advanced position.
  • a return spring 36 is provided, connected to the operating arm 32, and anchored, at its opposite end, to the frame.
  • an auxiliary mechanism 40 is pro vided which includes a plunger 4i telescoped within the vertical member 22.
  • the lower end of the plunger engages an extension 2321 on the member 23, the latter member being bottomed, with respect to the tip of the plunger, by means of a biasing spring 42.
  • a linkage which consists of a simple link 43 which is connected to one end of a centrally pivoted lever 44.
  • the opposite end of the lever carries a cam follower 45 which rides against the profile of an auxiliary cam 46.
  • the cam 46 only a portion of which is shown, is mounted upon the conveyor shaft 14.
  • Such cycle is endlessly repeated, causing the take-off gripper to traverse a closed loop path in which the gripper grips the leading edge of a sheet carried by the gripper 16 on the conveyor chain.
  • the take-off gripper is accelerated in the retracting direction to remove the sheet from the conveyor and to release the sheet over the pile 17 onto which it settles by gravity.
  • the means for producing timed operation of the take-off gripper 25 is entirely conventional and outside of the scope of the present invention.
  • a stop is coupled to the push rod for reciprocating movement therewith, and a latch is arranged adjacent the path of movement of the stop, the latch being mounted for movement between a latching position and a released position, the latch in latching position serving to captively retain the stop so that the push rod 30, arm 21 and gripper 25 are thereafter held in retracted position, accompanied by stressing of the spring 36 and separation of the cam follower 33 from the cam 34.
  • a stop 50 is provided secured to the lower edge of the push rod and which eooperates with a centrally pivoted latch 51 having a hook 52, pivot 53, and tail 54.
  • the tail 54 is positioned, with the latch in latching position, by a stop 55.
  • a biasing spring 56 is provided having an associated stop 57.
  • the means for moving the latch to its latching position includes a solenoid 60 having a plunger 61, the solenoid being connected in an electrical circuit which includes a pushbutton or other type of switch 62.
  • the upper end of the plunger extends through a clearance opening 63 in the latch and terminates in an abutment or shoulder 64.
  • a sloping surface is interposed between the stop 50 and latch 51 so that when the latch is moved to the illustrated latching position, the stop 50 is enabled to wipe" idly by the latch into position behind the latch hook where the stop is subsequently retained.
  • two sloping surfaces are used, which cooperate with one another, a surface 65 on the stop and 66 on the latch which, upon engagement, cooperate with one another to cam the left-hand end of the latch member downwardly.
  • the abutment 64 on the solenoid plunger is not rigidly connected to the plunger but is coupled to the plunger via a coil spring 67.
  • the operating pushbutton 62 may be pressed at any time regardless of the phase position of the push rod.
  • the solenoid when the solenoid is energized imparting clockwise rocking movement to the latching member to place it in its latching condition, the chances are that the stop member 50 will be at some position to the left of the latch.
  • the latch is cammcd in a counterclockwise direction, with yielding accommodation at the spring 67, so that the latch may move without corresponding movement of the solenoid plunger.
  • the latch member is again rocked into the illustrated position so that the push rod is captively retained to disable the take-off arm against further advancing movement. Retention of the push rod maintains the return spring 36 in its extended condition, disabling the return spring so that it is no longer effective in maintaining the push rod 30 bottomed on the surface of cam 34, so that the cam follower 33 is clear of the cam surface and any further rotation of the cam, therefore, takes place idly.
  • a take-off mechanism comprising an L-shaped take-off arm having a horizontal member and a vertical member, the horizontal member having a take-off gripper at its end and the ver tical member being pendulously pivoted for horizontal swinging movement of the gripper between an advanced position and a retracted position, a reciprocating push rod coupled to the vertical leg at one end and having a cam follower at the other, a cycling cam coupled to the drive for causing the push rod to positively retract the arm and gripper, a return spring coupled to the arm for impositively advancing the arm and gripper while maintaining the cam follower seated against the cam thereby to swing the take-off arm so that the gripper thereon removes sheets from the conveyor and deposits them one by one on the pile, a stop coupled to the push rod for reciprocating movement therewith, a latch arranged adjacent the path of
  • a sheet delivery mechanism for a printing press having a drive and a conveyor for conveying sheets individually in spaced relation
  • means defining a pile of sheets at the end of the conveyor 21 takeoff arm having a take-off gripper at its end and mounted for horizontal movement of the gripper between an advanced position and a retracted position

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)
US448629A 1973-03-09 1974-03-06 Take-off grippers in printing presses Expired - Lifetime US3900193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2311633A DE2311633A1 (de) 1973-03-09 1973-03-09 Abnahmegreifer an druckmaschinen

Publications (1)

Publication Number Publication Date
US3900193A true US3900193A (en) 1975-08-19

Family

ID=5874208

Family Applications (1)

Application Number Title Priority Date Filing Date
US448629A Expired - Lifetime US3900193A (en) 1973-03-09 1974-03-06 Take-off grippers in printing presses

Country Status (6)

Country Link
US (1) US3900193A (enrdf_load_stackoverflow)
CH (1) CH568228A5 (enrdf_load_stackoverflow)
DE (1) DE2311633A1 (enrdf_load_stackoverflow)
FR (1) FR2220454B3 (enrdf_load_stackoverflow)
GB (1) GB1430915A (enrdf_load_stackoverflow)
IT (1) IT1007761B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511130A (en) * 1983-07-28 1985-04-16 Metromail Corporation Phase controlled gripper operating system for collator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2568146B1 (fr) * 1984-07-24 1987-05-07 Boechat Roland Machine a vernir simultanement les deux cotes de feuilles de carton
DE102004061132A1 (de) * 2004-12-20 2006-06-29 Koenig & Bauer Ag Vorrichtung zur Bogenablage im Ausleger einer bogenverarbeitenden Druckmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779592A (en) * 1954-09-09 1957-01-29 American Box Board Co Feed hopper
US2927792A (en) * 1957-07-23 1960-03-08 Int Paper Box Machine Co Reciprocating sheet feed apparatus
US3245682A (en) * 1964-02-10 1966-04-12 Rca Corp Command feed mechanism
US3779545A (en) * 1971-07-14 1973-12-18 Roland Offsetmaschf Delivery arrangement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779592A (en) * 1954-09-09 1957-01-29 American Box Board Co Feed hopper
US2927792A (en) * 1957-07-23 1960-03-08 Int Paper Box Machine Co Reciprocating sheet feed apparatus
US3245682A (en) * 1964-02-10 1966-04-12 Rca Corp Command feed mechanism
US3779545A (en) * 1971-07-14 1973-12-18 Roland Offsetmaschf Delivery arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511130A (en) * 1983-07-28 1985-04-16 Metromail Corporation Phase controlled gripper operating system for collator

Also Published As

Publication number Publication date
FR2220454B3 (enrdf_load_stackoverflow) 1976-12-17
DE2311633A1 (de) 1974-09-26
GB1430915A (en) 1976-04-07
IT1007761B (it) 1976-10-30
FR2220454A1 (enrdf_load_stackoverflow) 1974-10-04
CH568228A5 (enrdf_load_stackoverflow) 1975-10-31

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