EP3331788A1 - Rouleau plieur doté de pinces montées séparément dans une machine d'entrepliage - Google Patents

Rouleau plieur doté de pinces montées séparément dans une machine d'entrepliage

Info

Publication number
EP3331788A1
EP3331788A1 EP16770358.6A EP16770358A EP3331788A1 EP 3331788 A1 EP3331788 A1 EP 3331788A1 EP 16770358 A EP16770358 A EP 16770358A EP 3331788 A1 EP3331788 A1 EP 3331788A1
Authority
EP
European Patent Office
Prior art keywords
jaw
folding roller
drive shaft
movable jaw
movable
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.)
Granted
Application number
EP16770358.6A
Other languages
German (de)
English (en)
Other versions
EP3331788B1 (fr
Inventor
Francesco PUGI
Francesco TESTI
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3331788A1 publication Critical patent/EP3331788A1/fr
Application granted granted Critical
Publication of EP3331788B1 publication Critical patent/EP3331788B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/24—Interfolding sheets, e.g. cigarette or toilet papers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B65H45/162—Rotary folders with folding jaw cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B65H45/162—Rotary folders with folding jaw cylinders
    • B65H45/163—Details of folding jaws therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/73—Couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1924—Napkins or tissues, e.g. dressings, toweling, serviettes, kitchen paper and compresses

Definitions

  • the present invention refers to the counter-rotating folding rollers group in a
  • machines in which there are a plurality of rollers arranged according to two distinct sequences each of which receives a strip of paper material, usually tissue, from which the sheets are obtained.
  • the strip is first cut into sheets of suitable length and then conveyed toward a pair of counter-rotating folding rollers, each constituting the last roller of the above said rollers sequences.
  • the paper material sheets are folded and suitably overlapped in such a way that on a sheet coming from the first rollers sequence is partially overlapped a subsequent sheet coming from the second rollers sequence.
  • the stacked and partially overlapped sheets are separated into default size bundles and then transferred to an unload unit.
  • Some types of conventional counter-rotating folding rollers are provided with ducts suitable to be placed in communication with suction members in such a way that the capture of the paper takes place thanks to the creation of vacuum on the surface of the rollers.
  • each of the folding rollers is provided on its surface with wedges angularly alternate with clamps.
  • the nose of the wedge protruding from the relative roller surface, enters a slot on the opposed roller in which is placed a movable jaw which forms, together with the wall of the slot istelf, a clamp.
  • the wedge catches the two paper sheets and causes the curvature of a portion of them.
  • the relative movable jaw is maintained in the release configuration via cam actuation elements that, mounted on the longitudinal end of the roller, act on a portion longitudinally projecting from the roller of the movable jaw.
  • the movable jaw is brought into the clamping position, thanks also to the action of springs which act on the movable jaw, thus tightening the edges of sheets that are caught in the clamp creating a transverse fold in the sheets.
  • the main problem of this type of solution consists in the fact that the movable jaw, which is a single body longitudinally extending for the whole length of the folding roller, must be constructed with great accuracy as, to enable it to work correctly for the whole longitudinal extension of the paper sheets, the allowed dimensional tolerances are extremely small.
  • the conventionally adopted solution for ensuring the required dimensional tolerances is to mount the movable jaws in the relative roller, so that they work by removing chips around the whole roller with the already mounted clamps.
  • there are also problems of maintenance because even the damage of only a small longitudinal portion of a movable jaw involves the necessity of having to replace the whole movable jaw.
  • the object of the present invention is to propose counter-rotating folding rollers for an interfolding machine so as to overcome the above noted problems of the prior art.
  • an object of the present invention is to propose a folding roller with limited production costs, in particular thanks to the fact that it is not necessary to perform chip removal treatment on the clamps after they are mounted on the roller.
  • Another object of the present invention is to propose a folding roller of easy
  • a folding roller with clamp and wedge for an interfolding machine provides peripherally first longitudinal grooves, angularly equidistant from each other, suitable to receive, in a radially sliding mode, catching wedges whose external end extends in a standby position from the roller surface, with the above mentioned wedges resiliently supported inside the relative grooves to radially move back, and peripherally comprising a same number of second longitudinal grooves, angularly equidistant from each other, alternate to the first longitudinal grooves, suitable to receive movable jaws mounted for swinging into the second grooves, between a clamping position, in which the movable jaw is arranged to interact with a corresponding fixed jaw made in a wall of said second groove, and a release position, in which the movable jaw is spaced from the fixed jaw and wherein, with the movable jaws, are associated elastic members arranged to press the movable jaw toward the clamping position.
  • a longitudinally elongated drive shaft that can be selectively rotated in step relation with the rotation of the folding roller between a clamping position of the movable jaw and a release position of the movable jaw, and a plurality of jaw elements mounted on the drive shaft, longitudinally aligned with one another.
  • the movable jaw includes an automatic unlocking device suitable to allow a rotation of the jaw element towards the release position when the drive shaft is rotated into the clamping position of the movable jaw.
  • a folding roller with clamp and wedge allows to simplify the construction of the roller itself as it provides a plurality of independent jaw elements that do not need to be perfectly aligned with each other to work properly.
  • Figure 1 shows a front view of a folding roller according to the invention
  • Figure 2 shows a view along the section line II-II in Fig.l;
  • Figure 4 shows a front view of a component of the folding roller of Fig.1 ;
  • Figure 5 shows a view along the section line V-V of Fig.4;
  • Figure 6 shows a first perspective view of the component of Fig.4
  • Figure 7 shows a second perspective view of the component of Fig.4.
  • a folding roller for an interfolding machine which comprises a substantially cylindrical body, 11, mounted on a shaft, 12, rotatably supported at both ends.
  • the folding roller 10 is arranged to be mounted for rotating about its horizontal axis and opposite to an identical second folding roller.
  • At the end of the shaft 12 are provided mechanical members, not shown, suitable for putting in step relation the rotation of the folding roller 10 with that one of the second identical counter-rotating roller.
  • the cylindrical body 11 peripherally includes a plurality of radial slots, 13, arranged longitudinally equidistant, suitable to receive a corresponding plurality of folding fingers, not shown because of known art.
  • the cylindrical body 11 also peripherally comprises first longitudinal grooves, 14, angularly equidistant from each other. More precisely, in the represented embodiment, the first longitudinal grooves are in number of four arranged at 90° one from the other, they longitudinally extend for the whole length of the cylindrical body 11 and have a depth greater than the radial slots 13.
  • the first longitudinal grooves 14 are suitable to receive, for radially slide, catching wedges, 20, whose outer end extends in a standby position from the surface of the cylindrical body 11, with the above said wedges resiliency supported inside the relative grooves 14 in order to have the possibility to radially move back.
  • the cylindrical body 11 peripherally comprises a same number of second longitudinal grooves, 15, angularly equidistant from each other, alternate to the first longitudinal grooves 14. More precisely, in the represented embodiment, the second longitudinal grooves 15 are four in number arranged at 90° one from the other. The second longitudinal grooves 15 are suitable to receive movable jaws, 30, mounted for swinging inside the second grooves 15.
  • a third longitudinal groove is peripherally made between a first longitudinal
  • Shaped cover elements, 40 are associated via fastening members, 41, with the third longitudinal groove and have cylindrical external surface, 42, shaped to copy the outer surface of the cylindrical body 11.
  • the shaped cover elements 40 extend in the second longitudinal groove 15 so as to prevent the exit of the movable jaws 30 and are shaped so as to form, on the side of the second longitudinal groove 15, an inclined wall that constitutes a fixed jaw, 43, suitable to interact with a jaw end, 31, of the movable jaw 30.
  • the movable jaw 30 includes a drive shaft, 32, longitudinally elongated and a plurality of jaw elements, 33, mounted on the drive shaft 32 longitudinally aligned with each other.
  • each jaw element 33 longitudinally extends for a length equal to the distance between two subsequent radial slots 13.
  • the drive shaft 32 extends longitudinally from the end of the cylindrical body 11 so that, through appropriate motion transmission members located in correspondence of the ends of the shaft 12, not shown, the drive shaft 32 is selectively rotated, in step relation with the rotation of the folding roller 10, between a clamping position of the movable jaw 30, in which the jaw end 31 interacts with the fixed jaw 43, and a release position of the movable jaw 30 itself, in which the jaw end 31 and the fixed jaw 43 are spaced apart as shown in the figures.
  • a motion transmission element, 34 is disposed between the drive shaft 32 and the jaw element 33 to transmit the oscillating movement of the drive shaft 32 to the jaw element 33.
  • An automatic unlocking device, 35 is provided between the drive shaft 32 and the jaw element 33 in correspondence with the motion transmission element 34, suitable to allow a rotation of the jaw element 33 towards the release position when the drive shaft 32 is rotated into the clamping position of the movable jaw 30.
  • the jaw element 33 is rotatably coupled to the drive shaft 32 and the motion transmission element 34 is constituted by a roller disposed rigid with the peripherally drive shaft 32 projecting from its surface that interacts with a cavity of the internal surface of the jaw element 33.
  • the above said cavity of the jaw element 33 has a slotted shape so as to allow the rotation of the drive shaft 32 with respect to the jaw element 33 and thus constitutes the above mentioned automatic unlocking device 35.
  • the movable jaw 30 can return to the release position and therefore not to be damaged even when the drive shaft 32 is in the clamping position. Moreover, since the jaw element 33 is maintained in the clamping position only by the action of the elastic members 37, each of the jaw elements 33 is substantially independent from the others and the not perfect angular alignment is then automatically compensated for all the jaw elements 33 longitudinally aligned in the second longitudinal groove 15 and associated to a same drive shaft 32.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

La présente invention concerne un rouleau plieur pour des machines d'entrepliage (10) du type à pinces et à cales comprenant des mâchoires mobiles (30) constituées par un arbre d'entraînement (32) sur lequel sont montés plusieurs éléments de mâchoire (33) alignés dans le sens longitudinal et pourvus d'un dispositif de déverrouillage automatique (35) qui les rend indépendants l'un de l'autre avec des avantages évidents se rapportant à la simplification des traitements mécaniques à mettre en œuvre sur le rouleau plieur et des opérations de maintenance.
EP16770358.6A 2015-08-07 2016-08-05 Rouleau plieur doté de pinces montées séparément dans une machine d'entrepliage Active EP3331788B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2015A002998A ITUB20152998A1 (it) 2015-08-07 2015-08-07 Rulli piegatori contro-rotanti a pinze indipendenti in una macchina per interfogliato
PCT/IB2016/054743 WO2017025879A1 (fr) 2015-08-07 2016-08-05 Rouleau plieur doté de pinces montées séparément dans une machine d'entrepliage

Publications (2)

Publication Number Publication Date
EP3331788A1 true EP3331788A1 (fr) 2018-06-13
EP3331788B1 EP3331788B1 (fr) 2019-06-12

Family

ID=54477167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16770358.6A Active EP3331788B1 (fr) 2015-08-07 2016-08-05 Rouleau plieur doté de pinces montées séparément dans une machine d'entrepliage

Country Status (3)

Country Link
EP (1) EP3331788B1 (fr)
IT (1) ITUB20152998A1 (fr)
WO (1) WO2017025879A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200001397A1 (it) 2022-01-27 2023-07-27 Im Converting S R L Rullo piegatore del tipo utilizzato in macchine per interfogliato

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468254A (en) * 1945-02-16 1949-04-26 Int Cellucotton Products Interfolding machine
DE4143003A1 (de) * 1991-12-24 1993-07-01 Hobema Maschf Hermann Vorrichtung zum querfalten von bahnen oder bahnabschnitten aus papier, tissue, nonwoven oder dergleichen
JP3674007B2 (ja) * 2002-07-16 2005-07-20 株式会社東京機械製作所 咥え折装置

Also Published As

Publication number Publication date
EP3331788B1 (fr) 2019-06-12
ITUB20152998A1 (it) 2017-02-07
WO2017025879A1 (fr) 2017-02-16

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