EP1148010B1 - Vorrichtung zum öffnen von Signaturen - Google Patents

Vorrichtung zum öffnen von Signaturen Download PDF

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Publication number
EP1148010B1
EP1148010B1 EP00830222A EP00830222A EP1148010B1 EP 1148010 B1 EP1148010 B1 EP 1148010B1 EP 00830222 A EP00830222 A EP 00830222A EP 00830222 A EP00830222 A EP 00830222A EP 1148010 B1 EP1148010 B1 EP 1148010B1
Authority
EP
European Patent Office
Prior art keywords
opening
signature
signatures
station
along
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
EP00830222A
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English (en)
French (fr)
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EP1148010A1 (de
Inventor
Roberto Fustinoni
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.)
Meccanotecnica SpA
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Meccanotecnica SpA
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Filing date
Publication date
Application filed by Meccanotecnica SpA filed Critical Meccanotecnica SpA
Priority to EP00830222A priority Critical patent/EP1148010B1/de
Priority to DE60005791T priority patent/DE60005791T2/de
Priority to AT00830222T priority patent/ATE251583T1/de
Publication of EP1148010A1 publication Critical patent/EP1148010A1/de
Application granted granted Critical
Publication of EP1148010B1 publication Critical patent/EP1148010B1/de
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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
    • B65H5/30—Opening devices for folded sheets or signatures
    • B65H5/305—Opening devices for folded sheets or signatures comprising rotary means for opening the folded sheets

Definitions

  • the present invention relates to an opening station for signatures.
  • Signatures are commonly used for producing books.
  • a signature is constituted by a large printed sheet which is folded one or more times (so as to form the pages of the hook).
  • a last fold defines a back of the signature, and an edge opposite the back defines a lip (or front) of the signature; the back is connected to the lip by means of an upper edge (where the reading of the page starts) and a lower edge, which define a head and a foot of the signature, respectively.
  • the signature has one or more lower and upper layers, according to the number and type of folds performed.
  • the signatures (of which there are a predetermined number) are sewn together in the vicinity of the back by means of a suitable machine.
  • the signatures are folded and piled up together so that the sewing machine requires a station which opens the signatures in the middle before sewing.
  • the opening station is typically constituted by a series of suction cups which lift the various (upper and lower) layers of the signature in sequence until its middle is reached; at this point, the signature is then dropped astride a saddle which transports the signature towards a sewing station.
  • the signatures are subjected to a punching operation, for example, to define easily removable corners of the pages (as in a diary).
  • the punching operation creates greater adhesion between the sheets of the signature so that the signature may not open fully when it falls on the saddle. Failure of the signature to open causes jamming of the opening station and a consequent need to interrupt the operation of the entire sewing machine; this leads to a considerable reduction in the productivity of the machine.
  • a known solution consists of fanning the signatures before inserting them in the sewing machine.
  • the signatures are passed between two rollers which rotate at slightly different speeds so as to create relative sliding between the sheets of the signature.
  • a different known solution consists of the provision of an anvil disposed between the opening suction cups and the saddle; the anvil has a length equal to that of the lips of the signatures and extends perpendicular to an axis of supply of the signatures.
  • the object of the present invention is to overcome the above-mentioned drawbacks.
  • the present invention provides an opening station for signatures each having a lip with a first end and a second end, the opening station comprising means for supplying the signatures in succession along a supply axis at a predetermined supply speed, first opening means for opening each signature in the middle, in the vicinity of the first end of the lip, and second opening means for opening the signatures in the middle, along the lip, the opening station including means for moving the second opening means transverse the supply axis with a velocity having a component along the supply axis substantially equal to the supply speed, the second opening means sliding along the lip of the signature from the first end to the second end.
  • the present invention also proposes a sewing machine comprising the opening station and a corresponding method of opening the signatures.
  • this shows a sewing machine 100 for book signatures.
  • the sewing machine includes a supply hopper 105; a pile of signatures 110 is loaded into the supply hopper 105 with the back and the head of each signature 110 facing downwards and to the left, respectively.
  • An extraction pincer 115 takes the signatures 110 in succession from the bottom of the pile and supplies them to a station 120 (described in detail below) which opens each signature 110 in the middle.
  • the signatures 110 are deposited astride a saddle 125 (with the back in an upper position); the saddle 125 transports the signatures 110 to a double re-forming station 130 which presses the back of each signature 110.
  • the signatures 110 are then transferred to a movable saddle of a sewing station 135.
  • the signatures 110 of one block constituted by a predetermined number of signatures 110 (according to the size of the book), are sewn together in the vicinity of their backs by means of a continuous thread. Once a last signature 110 of the block has been sewn, the thread is cut and the block of signatures 110 is transferred to a holder 140 (in order to be supplied to further machines which complete the production of the book).
  • the operation of the sewing machine 100 is controlled by an electronic logic unit programmable by means of a control panel 145.
  • the opening station of the present invention may in any case also be used in other applications, for example, in a machine which opens the signatures in the middle in order to insert loose sheets, etc.
  • the opening station 120 comprises an inclined plane 203 having a downwardly curved upper end; the signatures 110 slide upwards on the plane 203 along a supply axis 206 (constituted by a longitudinal axis of the sliding plane 203).
  • a set of conveyor belts 209 (three belts in the example shown in the drawing) is associated with the sliding plane 203.
  • Each conveyor belt 209 is stretched between a respective pulley and a respective idle wheel (not shown in the drawing); the pulleys associated with the conveyor belts 209 are mounted on a shaft 212 driven by an electric motor (not shown in the drawing).
  • Each conveyor belt 209 has a series of respective pincers 215 (for example, ten pincers) which are distributed uniformly along the belt; each pincer 215 is aligned with the corresponding pincers of the other conveyor belts 209, perpendicular to the supply axis 206.
  • each pincer 215 for example, ten pincers
  • a battery of lower rotary opening heads 218a, 218b, 218c and 218d and a battery of upper rotary opening heads 221a, 221b, 221c and 221d are disposed beside the sliding plane 203; a vacuum suction cup is mounted on each opening head.
  • Both the lower opening heads 218a-218d and the upper opening heads 221a-221d are aligned with one another parallel to the supply axis 206.
  • Each lower opening head 218a-218d and each upper opening head 221a-221d rotates about an axis (parallel to the sliding plane 203 and perpendicular to the supply axis 206) which is disposed below or above the sliding plane 203, respectively.
  • a spreader wedge 230 is provided between the lower opening heads 218b and 218c (a similar wedge, not shown in the drawing, is provided between the lower opening heads 218a and 218b).
  • the wedge 230 which is arranged with a longitudinal axis parallel to the supply axis 206 and a base facing forwards, moves transverse the supply axis 206.
  • Gripping fingers 236 are articulated in the vicinity of the upper end of the sliding plane 203 (downstream of the opening heads 218a-218d and 221a-221d); each gripping finger 236 is constituted by a thin rearwardly-bent tube which emits an air-jet.
  • the opening station has a different structure, for example, a different number of conveyor belts or of opening heads, if the opening heads are arranged differently (for example, with the opening heads aligned perpendicular to the supply axis), if the suction cups are replaced by devices with an electrostatic effect, with pressure-sensitive adhesive, etc.
  • the chain 245 is stretched between two sprockets 248a, 248b.
  • the sprocket 248a is connected to the drive shaft 212 by means of a geared transmission system 251, whereas the sprocket 248b is idle.
  • the chain 245 forms a loop which extends transverse the supply axis 206 (obliquely) in a plane inclined to the sliding plane 203; in particular, the loop is constituted by a straight front portion and a straight rear portion (parallel to one another) connected by a left-hand arcuate portion and a right-hand arcuate portion.
  • the chain 245 transports two opening elements arranged in diametrally opposed positions along the chain 245; each opening element is constituted by a metal plate terminating in an end bent upwards to define a respective opening nail 254a or 254b (facing outwards relative to the loop formed by the chain 245).
  • a thin tube 257 which emits an air-jet downwards, is disposed on the frame 242, in the vicinity of the right-hand connecting portion of the loop.
  • the signatures 110 are taken continuously from the supply hopper and deposited on the sliding plane 203.
  • the drive shaft 212 moves the belts 209 at a constant speed (anticlockwise when viewed from the right-hand side).
  • a set of pincers 215 reaches the signature 110 deposited on the sliding plane 203, each pincer 215 is closed onto the back of the signature 110.
  • the signature 110 is thus thrust forwards along the supply axis 206 at a predetermined speed (for example, of the order of a few m/s, corresponding to an operating rate of a few hundreds of signatures per minute).
  • the opening heads 218a-218d, 221a-221d do not interfere with the signatures 110 supplied in succession onto the sliding plane 203.
  • a deflector plate (not shown in the drawing) is activated and bends a left-hand end of the lip of the signature 110, defined by the connecting point between the lip and the head, slightly towards the corresponding opening head.
  • the suction cup of the opening head 218a is activated and engages a free surface of a first lower layer of the signature 110. Rotation of the opening head 218a causes a left-hand end of the first lower layer to be pulled downwards, away from the remaining part of the signature 110.
  • a separating finger (not shown in the drawing) is inserted between the first lower layer and the remaining part of the signature 110 (so as to keep the signature 110 open).
  • the suction cup of the opening head.218a is then de-activated, releasing the first lower layer.
  • the opening head 218b is kept inactive if the signature 110 comprises only one lower layer.
  • the suction cup of the opening head 218b engages a second lower layer of the signature 110 and pulls it downwards so as to open the signature 110 in the middle, in the vicinity of the left-hand end of the lip.
  • the wedge 230 is then moved towards the right so as to be inserted between the two halves of the signature 110.
  • the drive shaft 212 moves the sprocket 248a (clockwise when viewed from above), by means of the geared transmission system; the chain 245, and hence also the opening nails 254a, 254b, consequently move in synchronism with the belts 209, at a constant speed.
  • the geared system 251 has a transmission ratio such that the opening nails 254a, 254b move (along an operative portion of the loop constituted by the rear straight portion) with a velocity having a component along the supply axis 206 equal to the speed of supply of the signatures 110.
  • the nail 254a (once the left-hand connecting portion of the loop has been passed) is inserted between the two halves of the signature 110 (opened out by the wedge 230).
  • the nail 254a moves (along the rear straight portion of the loop) at the same speed as the signature 110, along the supply axis 206; the movement of the nail 254a relative to the signature 110 consequently has solely a translational component (towards the right), perpendicular to the supply axis 206.
  • the opening nail 254a therefore slides along the lip of the signature 110 from the left-hand end to a right-hand end (defined by the point of connection between the lip and the foot).
  • the tube 257 emits an air-jet which urges the upper half of the signature 110 downwards.
  • the other nail 254b is brought into the vicinity of the opening head 218b so as to be ready to act on the next signature 110.
  • the suction cup of the last upper opening head 221d engages a free surface of an upper layer of the signature 110 and pulls it upwards so as to keep the signature 110 open in the middle.
  • the gripping fingers 236 are then pivoted rearwardly and are inserted between the two halves of the signature 110 thus opened.
  • the gripping fingers 236 restrain the lower half of the signature 110 and at the same time emit an air-jet which urges the upper half of the signature 110 upwards.
  • the signature 110 is dropped astride the saddle for transportation towards the sewing station (by simultaneous opening of the pincers 215 and forward pivoting of the gripping fingers 236).
  • the opening station includes first opening means for opening each signature in the middle, in the vicinity of a first end of the lip, and second opening means for opening the signature in the middle, along the lip; means are also provided in the opening station of the present invention for moving the second opening means transverse the supply axis with a velocity having a component along the supply axis substantially equal to the supply speed, so that the second opening means slide along the lip of the signature from the first end to a second end.
  • the opening station according to the present invention is extremely reliable since the opening nails ensure perfect opening of the signatures in each case.
  • the signatures are subjected to punching operations (although its use in other situations is not excluded).
  • the signatures may in fact not be opened fully by the opening heads, because of the strong adhesion between the sheets; in fact it should be noted that an angle of opening of the signatures must be kept to a limited value in order not to risk tearing the sheets in the portions weakened by the punching operation.
  • the opening nails cut any point of adhesion between the two halves of the signature along the lip.
  • the structure of the present invention enables a fast signature supply speed to be maintained, ensuring high productivity of the sewing machine.
  • the loop structure is extremely simple, the chain 245 ensures good reliability whilst the two opening nails 254a, 254b enable a very compact structure to be achieved.
  • the air-jet which urges the upper half of the signature downwards prevents any possible interference of the signature with the opening nail along a non-operative portion of the loop (distinct from the rear straight portion) and the geared transmission system 251 ensures perfect synchronism between the belts 209 and the opening nails 254a, 254b.
  • the opening station of the present invention may, however, also be implemented with the chain arranged in a loop of a different shape (for example, a triangular loop with three opening nails), with a track for transporting the opening nails, with a different number of opening nails, or with the chain driven independently of the drive shaft.
  • the chain is positioned differently, for example, upstream of the opening heads (if the opening heads are aligned perpendicular to the supply axis); in this situation, it is also possible to move a single opening nail alternately towards the left and towards the right along a straight track (which is rotated alternately clockwise and anticlockwise in order to position the opening nail in the vicinity of the lip of the signature).

Claims (9)

  1. Öffnungsstation (120) für Signaturen (110), wobei jede eine Kante mit einem ersten Ende und einem zweiten Ende aufweist, wobei die Öffnungsstation (120) Einrichtungen (203, 209-215) zum Zuführen der Signaturen (110) nacheinander entlang einer Zufuhrachse (206) bei einer vorbestimmten Zufuhrgeschwindigkeit, erste Öffnungseinrichtungen (218a-218d, 221a-221d) zum öffnen jeder Signatur (110) in der Mitte, in der Nähe des ersten Endes der Kante, und zweite öffnungseinrichtungen (254a, 254b) zum Öffnen der Signatur (110) in der Mitte, entlang der Kante, Einrichtungen (245, 248a, 248b) zum Bewegen der zweiten öffnungseinrichtungen (254a, 254b) quer zur Zufuhrachse (206) mit einer Geschwindigkeit mit einer Komponente entlang der Zufuhrachse (206), welche im Wesentlichen gleich der Zufuhrgeschwindigkeit ist, umfasst, wobei die zweiten öffnungseinrichtungen (254a, 254b) entlang der Kante der Signatur (110) vom ersten Ende zum zweiten Ende gleiten, dadurch gekennzeichnet, dass die Öffnungsstation (120) ferner eine Gleitebene(203) für die Signaturen (110) umfasst, und dass die Bewegungseinrichtungen (245, 248a, 248b) die zweiten Öffnungseinrichtungen (254a, 254b) entlang eines Pfades in der Form einer Schleife, die in einer Ebene geneigt zur Gleitebene (203) angeordnet ist, bewegen, wobei die Schleife einen Betriebsbereich und einen Nicht-Betriebsbereich für die zweiten Öffnungseinrichtungen (254a, 254b) umfasst.
  2. Öffnungsstation (120) nach Anspruch 1, wobei die Bewegungseinrichtungen (245, 248a, 248b) ein flexibles Transportteil (245) umfasst, welches die zweiten Öffnungseinrichtungen (254a, 254b) entlang der Schleife transportiert.
  3. Öffnungsstation (120) nach Anspruch 2, wobei die zweiten Öffnungseinrichtungen ein erstes Öffnungsteil (254a) und ein zweites öffnungsteils (254b) umfassen, welche in diametral gegenüberliegenden Positionen entlang des flexiblen Transportteils (245) angeordnet sind.
  4. Öffnungsstation (120) nach Anspruch 3, wobei jedes Öffnungsteil einen Nagel (254a, 254b) umfasst, der nach außen in Bezug auf die Schleife weist.
  5. Öffnungsstation (120) nach einem der Ansprüche 1 bis 4, ferner umfassend eine Einrichtung (257), um eine erste Hälfte der Signatur (110) in Richtung einer zweiten Hälfte der Signatur (110) in der Nähe des zweiten Endes der Kante zu drängen.
  6. Öffnungsstation (120) nach einem der Ansprüche 1 bis 5, wobei die ersten Öffnungseinrichtungen zumindest eine Vielzahl von Öffnungsköpfen (218a-218d, 221a-221d) umfassen, welche zueinander entlang der Zufuhrachse (206) ausgerichtet sind, und wobei sich die Bewegungseinrichtungen (245, 248a, 248b) zwischen einer Position stromabwärts von einem der Öffnungsköpfe (218b, 221b) und einer Position stromaufwärts von zumindest einem der Öffnungsköpfe (218d, 221d) erstrecken.
  7. Öffnungsstation (120) nach einem der Ansprüche 1 bis 6, ferner umfassend eine Transporteinrichtung (251) zum Verbinden der Bewegungseinrichtungen (245, 248a, 248b) mit der Zufuhreinrichtung (212).
  8. Nähmaschine (100) für Signaturen (110), umfassend die Öffnungsstation (120) nach einem der Ansprüche 1 bis 7, eine Nähstation (135) zum Zusammennähen einer vorbestimmten Anzahl der geöffneten Signaturen (110) und eine Einrichtung (125) zum Transportieren der geöffneten Signaturen (110) nacheinander von der Öffnungsstation (120) zur Nähstation (135).
  9. Verfahren zum Öffnen von Signaturen (110), wobei jede eine Kante mit einem ersten Ende und einem zweiten Ende aufweist, wobei das Verfahren die Schritte umfasst:
    Zuführen der Signaturen (110) nacheinander entlang einer Zufuhrachse (206) mit einer vorbestimmten Zufuhrgeschwindigkeit,
    Öffnen jeder Signatur (110) in der Mitte, in der Nähe des ersten Endes der Kante, mittels erster Öffnungseinrichtungen (218a-218d, 221a-221d),
    Öffnen der Signatur (110) in der Mitte, entlang der Kante, mittels zweiter Öffnungseinrichtungen (254a, 254b),
    Bewegen der zweiten Öffnungseinrichtungen (254a, 254b) quer zur Zufuhrachse (206) mit einer Geschwindigkeit mit einer Komponente entlang der Zufuhrachse (206), welche im Wesentlichen gleich der Zufuhrgeschwindigkeit ist, wobei die zweiten Öffnungseinrichtungen (254a, Kante der Signatur (110) von dem ersten Ende zum zweiten Ende gleiten, dadurch gekennzeichnet, dass die zweiten Öffnungseinrichtungen (254a, 254b) entlang eines Pfades in der Form einer Schleife, die in einer Ebene geneigt zur Gleitebene (203) für die Signaturen (110) angeordnet ist, bewegt werden, wobei die Schleife einen Betriebsbereich und einen Nicht-Betriebsbereich für die zweiten Öffnungseinrichtungen (254a, 254b) umfasst.
EP00830222A 2000-03-23 2000-03-23 Vorrichtung zum öffnen von Signaturen Expired - Lifetime EP1148010B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP00830222A EP1148010B1 (de) 2000-03-23 2000-03-23 Vorrichtung zum öffnen von Signaturen
DE60005791T DE60005791T2 (de) 2000-03-23 2000-03-23 Vorrichtung zum öffnen von Signaturen
AT00830222T ATE251583T1 (de) 2000-03-23 2000-03-23 Vorrichtung zum öffnen von signaturen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00830222A EP1148010B1 (de) 2000-03-23 2000-03-23 Vorrichtung zum öffnen von Signaturen

Publications (2)

Publication Number Publication Date
EP1148010A1 EP1148010A1 (de) 2001-10-24
EP1148010B1 true EP1148010B1 (de) 2003-10-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830222A Expired - Lifetime EP1148010B1 (de) 2000-03-23 2000-03-23 Vorrichtung zum öffnen von Signaturen

Country Status (3)

Country Link
EP (1) EP1148010B1 (de)
AT (1) ATE251583T1 (de)
DE (1) DE60005791T2 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845412A (en) * 1923-07-16 1932-02-16 Edward A Hathaway Stuffing machine
DE2508194A1 (de) * 1975-02-26 1976-09-09 Guenther Dr Ing Schick Vorrichtung zum oeffnen schuppenfoermig transportierter gefalzter lagen, vorzugsweise zeitungen oder zeitschriften
US5112036A (en) * 1990-08-27 1992-05-12 Graphic Management Associates, Inc. Opener for folder printed products

Also Published As

Publication number Publication date
DE60005791T2 (de) 2004-05-19
EP1148010A1 (de) 2001-10-24
DE60005791D1 (de) 2003-11-13
ATE251583T1 (de) 2003-10-15

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