EP0638503B1 - Dispositif pour décélérer des exemplaires dans un appareil de pliage - Google Patents

Dispositif pour décélérer des exemplaires dans un appareil de pliage Download PDF

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Publication number
EP0638503B1
EP0638503B1 EP94109941A EP94109941A EP0638503B1 EP 0638503 B1 EP0638503 B1 EP 0638503B1 EP 94109941 A EP94109941 A EP 94109941A EP 94109941 A EP94109941 A EP 94109941A EP 0638503 B1 EP0638503 B1 EP 0638503B1
Authority
EP
European Patent Office
Prior art keywords
rotating
gripper
slowing device
slowing
speed
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
EP94109941A
Other languages
German (de)
English (en)
Other versions
EP0638503A1 (fr
Inventor
Kevin Lauren Cote
Richard Daniel Curley
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0638503A1 publication Critical patent/EP0638503A1/fr
Application granted granted Critical
Publication of EP0638503B1 publication Critical patent/EP0638503B1/fr
Anticipated expiration legal-status Critical
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
    • B65H29/06—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 carried by rotating members
    • 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
    • B65H29/68—Reducing the speed of articles as they advance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/142—Roller pairs arranged on movable frame
    • B65H2404/1421—Roller pairs arranged on movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/53—Rotary gripping arms
    • B65H2405/531—Rotary gripping arms with relative movement of the arms relatively to the axis of rotation during rotation

Definitions

  • the present invention relates to a device for the slowdown of printed copies, in particular a device for the slowdown of folded copies in a folder by a gentle speed profile.
  • Paddle wheels are commonly used to slow copies in a folder. These paddle wheels comprise a plurality of paddle wheel disks with a number of curved paddle wheel blades extending outwards.
  • the paddlewheel pockets formed from the adjoining paddlewheel blades accommodate specimens emerging from a folder.
  • the curve shape and the notched surface of the bucket wheel blades slow the forward movement of the specimens stored in the bucket wheel pockets until a complete stop.
  • the U.S. Patent No. 4,629,175 discloses a device according to the preamble of claim 1, with which these disadvantages are to be overcome.
  • the device has several rows of grippers that rotate between a transfer or feed device and a delivery system.
  • the grippers are slowed down by an acceleration / deceleration drive so that they move in the transport direction from the transfer or delivery device to the delivery system at approximately the feed speed up to approximately the speed of the delivery system, and they can move up to the speed in their subsequent movement sections with which they moved before the slowdown are accelerated again.
  • the grippers are mounted on a cylindrical drum that rotates at a constant speed, and the rows of grippers slowed and accelerated by the acceleration / deceleration drive are rotated at a speed equal to that of the drum and are mounted so that they can be offset in relation to the outer surface of the drum.
  • the specimens are subject to deformation, misalignment and / or tearing during the transfer from the feed device to the deceleration drum. Since this transfer comes about because the delay drum so is positioned so that the gripper moves to a position in front of the leading edge of the specimen exiting the feed device, the speed of the specimen controlled by the feed device must be higher than the tangential speed of the gripper on the deceleration drum. This allows the specimen to gain the desired distance from the gripper until it enters the neck of the gripper. The gripper then closes and the speed of the front edge of the specimen suddenly changes and adjusts to the speed of the gripper.
  • Another object of the present invention is to provide an apparatus which transports successive copies from a folder to a delivery system in a stream of shingles, with the distance between the individual successive copies being strictly maintained.
  • the transport device can be a cutting cylinder, a folding cylinder, a conveyor belt system or another delivery system.
  • the gripper device can be a gripper head or, preferably, a rotating gripper, which is characterized by oppositely rotating, upper and lower rollers, which receive the front edge of the specimen emerging from the transport device in the nip formed between them.
  • the rotating gripper prevents sudden speed changes of the specimen while it is being transferred from the transport device to the decelerator, thereby minimizing deformation, misalignment and possible tearing of the specimen during the deceleration process.
  • the deceleration drum can alternatively be equipped with a cam and lever connection system instead of the swivel arm / turntable and control lever / control plate mechanism.
  • the gripper device preferably grips the front edge of the specimen as it exits the transport device, while the rear edge is still controlled by the transport device.
  • An advantage of the invention is that in the continued handling of the specimens by the Delay device until the copies are handed over to the delivery system of the product stream which contains hardly any laterally displaced, irregularly spaced or inclined copies.
  • Another advantage of the invention is the fact that no friction is used in the transport device to slow the specimens, so that the specimens are less likely to be damaged.
  • An additional advantage of the invention can be seen in the fact that the successive specimens are moved in the same speed curve and therefore their distance from one another never changes.
  • the device according to the invention can achieve speed deceleration rates of approximately 5: 1.
  • Fig. 1 shows a deceleration drum 10 according to the present invention for slowing copies in a folder.
  • the drum 10 includes a plurality of pivot arms 12 which are connected to a rotating turntable 14 and can rotate independently of one another.
  • the points of connection of the swivel arm 12 to the turntable 14 form a base circle which is concentric with the center of the turntable (point A).
  • Each control lever 16 is connected at its one end to a respective swivel arm 12 at a point which lies radially outside the bearing point of the swivel arm 12.
  • the other end of each control lever 16 is connected to a rotating scrubbing disc 18.
  • the points of connection of the control levers 16 with the control disk 18 form a base circle which is concentric with the center of the control disk (point B).
  • the turntable 14 and the control disk 18 rotate about their own centers at the same speed and in the same direction.
  • the centers of the turntable 14 and the control disk 18 are fixed and offset from one another by a distance d, ie by the distance between points A and B, as shown in FIG. 1.
  • the path of point (D) relative to point (C) is a circle c, the radius of which is equivalent to the offset distance d between the center of the turntable 14 and the center of the control disc 18, as shown in FIG. 2.
  • This circular path exists for each swivel arm 12 / control lever 16 pairs.
  • These parallel circles are equally spaced in a base circle around the center of the turntable 14 and in a radius that depends on the length of the control lever 16 and the size of the control disk 18.
  • the deceleration drum 10 picks up the specimens directly from the cutting cylinder, conveyor belt system, or other transport devices at high speeds. The specimens are gripped safely and slowed down by a gentle speed profile. Each copy is scaled by the drum 10 at slow speed. The exact distance between the flaked specimens depends on the spacing of the specimens from each other when they are transferred to the drum 10 and on the speed deceleration rate of the drum 10. transfer to a single specimen gripper transport system. Due to an improved register accuracy of the specimens moved over a deceleration drum 10, the performance can be reduced a belt delivery, the formation of stacks or blocks, or the performance of other conventional systems.
  • the swivel arm 12 / control lever 16 geometry can be constructed as a stationary four-link connection, as shown in FIG. 3.
  • the angular velocity of the swivel arm 12 relative to the position of the turntable 14 is analyzed using the four-part connection model.
  • Figure 4 is a graphical representation of this speed profile.
  • the tangential speed of the end of the swing arm 12 can be easily calculated based on the rotation of the turntable 14.
  • the tangential speed of the swivel arm 12 is then calculated on the basis of the angular speed of the turntable 14 around the control disk 18.
  • a graphical representation of the angular velocity of the turntable 14 about the control disk 18 is shown in FIG. 5.
  • the two tangential speeds are then superimposed and the result of the superimposition is the actual tangential speed of the swivel arm 12.
  • a graphical representation of this combined speed is shown in FIG. 6.
  • the geometry is preferably designed such that the maximum tangential speed is substantially the same as the speed of the specimen arriving on the decelerating drum 10 and the minimum tangential speed is substantially equal to the speed of the delivery system receiving the specimens coming from the drum.
  • 7 shows a typical specimen speed profile in accordance with the present invention.
  • the specimens 20 emerging from a conveyor belt system 22 are gripped by a gripper head 24 attached to the outer end of each swivel arm 12, as in FIG Fig. 8 shown.
  • the gripper head 24 holds the specimen 20 as it moves onto the deceleration drum 10.
  • the gripper head 24 is positioned so that it grips the leading edge of an incoming item 20 and then begins to slow the item down.
  • a control curve, not shown, is provided, which controls the timing of the gripper system.
  • the gripper system is preferably controlled so that the leading edge of the incoming specimen 20 is gripped by the gripper head 24 before the trailing edge of the specimen is released by the conveyor belt system 22.
  • the gripper head 24 has a wedge-shaped notch in the transport direction, so that the gripper head pushes a leading specimen outwards, so as to produce a shingled stream, as shown in FIG. 8.
  • the distance of one copy from the next on the deceleration drum 10 decreases until the copies reach the delivery speed and are released.
  • the copies 20 are then removed from the drum 10 by a delivery system, not shown.
  • a rotating gripper 26 is provided, which is characterized by a set of counter-rotating upper and lower rollers 28, 30 in order to control the signature 20 on a delay drum 10A, as in FIG. 9 shown.
  • the gap 32 between the upper and lower rollers 28, 30 is the point at which an incoming signature 20 is grasped.
  • the rotation of the upper and lower rollers 28, 30 about their respective axes is controlled by a cam or a link system.
  • the tangential surface speed of the top and bottom Rollers 28, 30 as they rotate about their respective axes are superimposed on the tangential speed of the nip 32 around the center of the deceleration drum 10A.
  • the result of this superimposition is a speed which is essentially the same as the speed of the signature 20 emerging from the conveyor belt system 22.
  • This speed adjustment enables control of the leading edge of the signature 20 by the set of upper and lower rollers 28, 30, while at the same time controlling the trailing edge of the specimen by the conveyor belt system 22 without there being any distortion or deformation of the signature 20.
  • the roller gap 32 is in a position of the exemplar path exactly where the gripper head 24 would be.
  • the rotating gripper 26 has the advantage that it controls the specimen 20 from the moment in which the front edge of the signature 20 has reached the roller gap 32. It is not necessary to wait until the signature 20 enters a gripper neck identified by an opening between the mutually rotating upper and lower rollers 28, 30 of the rotating gripper 26 before the delay drum 10A takes over control of the signature 20.
  • the leading edge of the signature 20 is driven into the approaching nip 32 by the desired amount before the rotation of the upper and lower rollers 28, 30 stops about their respective axes.
  • the upper and lower rollers 28, 30 follow a fixed speed curve so that the specimen evenly reduces its speed at which it exits the conveyor belt system 22 up to the speed of the deceleration drum 10A.
  • the upper and lower rollers 28, 30 are rotated about their respective axes in a direction which is the direction in which they move the specimen 20 from the Take over conveyor belt system 22 is opposite.
  • the tangential surface speed of the upper and lower rollers 28, 30 as they rotate about their respective axes is subtracted from the tangential speed of the nip 32 rotating about the center of the retard drum 10A to further slow down the specimen 20.
  • the speed of the specimen 20 can be adjusted to the speed of the delivery system in order to ensure a gentle transfer.
  • FIG. 9 shows a specimen 20 that enters the approaching nip 32 of the rotating gripper 26.
  • a control cam 34 and a link connection 36 are shown as a means for controlling the speed of the rotating gripper 26, whereby an adaptation to the speed of the specimen 20 controlled by the conveyor belt system 22 can be achieved.
  • the pivot arm 12 / control arm 16 and turntable 14 / control disc 18 mechanism described above and shown in Figs. 1, 2 and 8 is another means of controlling the speed of the rotating gripper 26.
  • Reference numeral 38 shows the desired portion of the through the nip 32 of the moving specimen 20 after the rotation of the upper and lower rollers 28, 30 has stopped.
  • the reference number 40 shows the specimen 20 when released from the nip 32 of the rotating gripper 26.
  • FIG 9 shows an exemplary embodiment of the rotating gripper 26
  • four sets of upper and lower rollers 28, 30 can be mounted on the retard drum 10A, the speed of which is controlled by a cam link system 34, 36.
  • other devices for controlling the Speed of the upper and lower rollers 28, 30 may be provided.
  • the 10 shows a type of delivery, the tangential speed of the specimen 20 being almost zero when it is released from the rotating gripper.
  • the specimen 20 is aligned with a fixed part 44. The risk of damage to the specimen 20 due to the impact against the alignment part 44 is minimized since its tangential speed is almost zero.
  • the specimens 20 collect vertically along the alignment member 44 and form a vertical stack 46.
  • Fig. 11 shows another type of delivery, wherein the tangential speed of the specimen released by the rotating gripper 26 corresponds to the speed of a tangential delivery system 48, e.g. of a single copy of the gripper transport system or a belt delivery system.
  • Fig. 12 shows another embodiment of the rotating gripper 26, which is characterized by oppositely rotating upper and lower rollers 28A, 30A attached to the outer end of a swing arm 12A.
  • the swing arm 12A moves to a position in front of a specimen released by a conveyor system 22A.
  • the swing arm 12A is mounted on a rotating disc 50, which is driven by a conventional acceleration / deceleration device as known from US Patent No. 4,629,175.
  • the tangential speed of the nip 32A around the center of the deceleration drum 10B is not constant.
  • the tangential surface speed of the upper and lower rollers 28A, 30A as they rotate about their respective axes is superimposed on the tangential speed of the nip 32A.
  • the result this overlay is a constant speed that matches the speed of the specimen exiting the conveyor system 22A.
  • the upper and lower rollers 28A, 30A rotate backward to release the specimens 20A in a shingled form.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Gas Separation By Absorption (AREA)

Claims (17)

  1. Dispositif de décélération de cahiers (20, 20A) transportés dans un appareil de pliage, comprenant les particularités suivantes :
    un dispositif preneur (24, 26) destiné à saisir fiablement le bord antérieur d'un cahier (20, 20A) qui quitte un dispositif de transport (22, 22A) de l'appareil de pliage fonctionnant à vitesse élevée : et un tambour décélérateur (10, 10A, 10B) destiné à décélérer le cahier (20, 20A) suivant un profil préventif de vitesse.
       caractérisé
    en ce que le tambour décélérateur (10) comprend au moins un bras pivotant (12) qui est monté pivotant sur un disque rotatif (14) tournant autour d'un premier axe ;
    en ce que l'au moins un bras pivotant (12) est relié à un disque de commande (18) par un levier de commande (16) ;
    en ce que le disque de commande (18) tourne autour d'un second axe qui est parallèle et décalé par rapport au premier axe ; et
    en ce que le dispositif preneur (24, 26) est monté sur une extrémité extérieure de l'au moins un bras pivotant (12).
  2. Dispositif de décélération selon la revendication 1,
       caractérisé
       en ce que le dispositif preneur est une tête preneuse (24).
  3. Dispositif de décélération selon la revendication 1,
       caractérisé
       en ce que le dispositif preneur est un preneur rotatif (26) qui est constitué d'un groupe de rouleaux supérieur et inférieur (28, 30) tournant en sens inverses et en ce que le bord antérieur d'un cahier (20) provenant d'un dispositif de transport (22, 22A) est reçu dans la surface contact (32) formée entre lesdits rouleaux (28, 30).
  4. Dispositif de décélération selon la revendication 1,
       caractérisé
       en ce que le dispositif de transport est un cylindre de coupe.
  5. Dispositif de décélération selon la revendication 1,
       caractérisé
       en ce que le dispositif de transport est un cylindre de pliage.
  6. Dispositif de décélération selon la revendication 1,
       caractérisé
       en ce que le dispositif de transport est un système à rubans transporteurs (22).
  7. Dispositif de décélération selon la revendication 2,
       caractérisé
       en ce que plusieurs têtes preneuses (24) sont reliées à plusieurs bras pivotants correspondants (12).
  8. Dispositif de décélération selon la revendication 3,
       caractérisé
       en ce que plusieurs preneurs rotatifs (26) sont reliés à plusieurs bras pivotants correspondants (12).
  9. Dispositif de décélération selon la revendication 3,
       caractérisé
       en ce qu'il comprend les particularités suivantes:
    au moins un preneur rotatif (26) comprenant un groupe de rouleaux supérieur et inférieur (28, 30) tournant en sens inverses, qui reçoivent dans la surface de contact (32) formée entre eux le bord antérieur d'un cahier (20) arrivant d'un dispositif de transport (22, 22A) de l'appareil de pliage et se déplaçant à vitesse élevée :
    et un bras pivotant (12A) qui est relié à une extrémité à l'au moins un preneur rotatif (26) et qui est relié rotatif à l'autre extrémité à un dispositif tournant (10A, 10B) qui fait pivoter le bras pivotant (12A) suivant un profil préventif de vitesse et ainsi fait diminuer progressivement la vitesse du cahier (20A).
  10. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que le dispositif tournant est un tambour de décélération (10A) équipé d'une came de commande (34) et d'un système d'assemblage articulé (36).
  11. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que le dispositif tournant est un tambour de décélération (10B) équipé d'un disque rotatif (50) et le bras pivotant (12A) est monté rotatif sur ledit disque rotatif (50) qui tourne autour d'un premier axe.
  12. Dispositif de décélération selon la revendication 11, qui comprend par ailleurs un disque de commande (18) qui est relié par un levier de commande (16) au bras pivotant (12) et qui tourne autour d'un second axe qui est parallèle et décalé par rapport au premier axe.
  13. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que le dispositif tournant est un disque rotatif (14) qui est entraîné par un dispositif d'accélération/décélération.
  14. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que le dispositif de transport est un cylindre de coupe.
  15. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que le dispositif de transport est un cylindre de pliage.
  16. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que le dispositif de transport est un système à rubans transporteurs (22A).
  17. Dispositif de décélération selon la revendication 9,
       caractérisé
       en ce que plusieurs preneurs rotatifs (26) sont reliés à plusieurs bras pivotants correspondants (12A).
EP94109941A 1993-08-09 1994-06-28 Dispositif pour décélérer des exemplaires dans un appareil de pliage Expired - Lifetime EP0638503B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US103842 1993-08-09
US08/103,842 US5452886A (en) 1993-08-09 1993-08-09 Device for slowing down signatures in a folding machine

Publications (2)

Publication Number Publication Date
EP0638503A1 EP0638503A1 (fr) 1995-02-15
EP0638503B1 true EP0638503B1 (fr) 1996-09-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109941A Expired - Lifetime EP0638503B1 (fr) 1993-08-09 1994-06-28 Dispositif pour décélérer des exemplaires dans un appareil de pliage

Country Status (5)

Country Link
US (2) US5452886A (fr)
EP (1) EP0638503B1 (fr)
JP (1) JP3504974B2 (fr)
AT (1) ATE142164T1 (fr)
DE (2) DE4417178A1 (fr)

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Also Published As

Publication number Publication date
ATE142164T1 (de) 1996-09-15
US5452886A (en) 1995-09-26
JP3504974B2 (ja) 2004-03-08
US5560599A (en) 1996-10-01
DE59400589D1 (de) 1996-10-10
DE4417178A1 (de) 1995-02-16
JPH0761676A (ja) 1995-03-07
EP0638503A1 (fr) 1995-02-15

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