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
  • B65H16/00—Unwinding, paying-out webs
  • B65H16/02—Supporting web roll
  • B65H16/028—Supporting web roll on its outer circumference
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H16/00—Unwinding, paying-out webs
  • B65H16/10—Arrangements for effecting positive rotation of web roll
  • B65H16/106—Arrangements for effecting positive rotation of web roll in which power is applied to web roll
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/413—Supporting web roll
  • B65H2301/4137—Supporting web roll on its outer circumference
  • B65H2301/4138—Supporting web roll on its outer circumference belt arrangement
  • B65H2301/41384—Supporting web roll on its outer circumference belt arrangement arranged in non-stationary manner, i.e. changing according to actual roll diameter
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/41—Winding, unwinding
  • B65H2301/415—Unwinding
  • B65H2301/41501—Special features of unwinding process
• • 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
  • B65H2404/20—Belts
  • B65H2404/26—Particular arrangement of belt, or belts
  • B65H2404/269—Particular arrangement of belt, or belts other arrangements
  • B65H2404/2692—Arrangement of belts in pressure contact with a roll of material
• • 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
  • B65H2404/20—Belts
  • B65H2404/26—Particular arrangement of belt, or belts
  • B65H2404/269—Particular arrangement of belt, or belts other arrangements
  • B65H2404/2693—Arrangement of belts on movable frame
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
  • B65H2511/10—Size; Dimensions
  • B65H2511/14—Diameter, e.g. of roll or package
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
  • B65H2511/20—Location in space
  • B65H2511/21—Angle

Definitions

• the present invention concerns an unwinder for paper converting.
• an unwinder is an apparatus intended to support the parent reels that feed the paper webs used for making paper logs from which are obtained, by way of example, toilet paper rolls or kitchen paper rolls etc. after the passage of the paper webs through suitable machines such as embossers, rewinders and cutting machines located downstream of the unwinders.
• an unwinder of the type indicated above comprises a support for the reel that feeds the paper web and a plurality of belts enslaved to a respective motor which, acting by contact on the paper of the reel, drag the tape that, therefore, unwinds along the direction of the same belts at a predetermined speed. Since the diameter of the reel gradually decreases while that the paper unwinds from the reel, there is the need to ensure a proper contact between the belts and the reel in such a way that the belts can follow this variation in diameter.
• the main purpose of the present invention is to provide a mechanism allowing to change the configuration of the driving belts of the unwinder while the diameter of the parent reel changes, without coming into mechanical or structural complications which would reduce its utility. This result is achieved, according to the present invention, by providing a device having the features indicated in claim 1. Other features of the present invention are the subject of the dependent claims.
• An unwinder in accordance with the present invention allows to adapt the configuration of the drive belts to the variable diameter of the parent reel in a particularly simple and effective way. Furthermore, an unwinder in accordance with the present invention is relatively cheap in relation to the advantages offered.
• FIGs.1-6 schematically show, in side view, an unwinder in accordance with the present invention in a sequence of configurations assumed starting from an initial time in which the diameter of the parent reel is maximum (Fig.l) until a final time in which said diameter has a minimum value (Fig.6);
• FIG.7 is a simplified diagram of a possible system for controlling the movement of the carriages that carry the follower pulleys;
• FIG.8 is an enlarged detail of Fig.3;
• Fig .9 is similar to Fig.6. but it shows, in particular, a possible system for moving the carriages (240, 250).
• an unwinder (S) according to the present invention comprises a support (1), on which can be placed a parent reel (B) , equipped with stop collars
• Each of the collars (10) defines a constraint for a corresponding pin (P) inserted in a respective side of the reel (B) .
• the collars (10) are open.
• the unwinding step that is, while the reel (B) rotates about its own axis (x) and about the axis of the pins (P)
• the collars (10) are closed (as in Figs.1-6).
• the reel (B) is exhausted and must be removed from the support (1) to be replaced with a new one, for example by means of a bridge crane or any other suitable handling means
• the collars (10) are open again.
• the support (1), as well as the the collars (10) and the pins (P) inserted in the parent reel (B) are of the type known to those skilled in the art and, therefore, are not described in greater detail.
• the unwinder (S) comprises a plurality of ring-closed belts (2) driven by pulleys (20, 21, 22, 23, 24, 25) with two pulleys (20, 21) placed at corresponding fixed positions, one pulley (22) also placed at a fixed position and connected with an electric motor so as to act as a driving pulley, a tensioning pulley (23) applied on a shaft that can be moved horizontally by means of a respective actuator (300) solid to an underlying fixed base (4), and two follower-pulleys (24, 25) whose distance from the longitudinal axis of reel (B) is constant.
• the follower-pulleys (24, 25) are placed each on a corresponding carriage (240, 250) that is free to slide along a guide (241, 251) radially oriented with respect to the axis of reel (B) , i.e. oriented radially with respect to the collar (10) .
• the belts are represented by dashed lines to better show their configuration.
• said guides (241, 251) are on opposite sides with respect to the collar (10) and are diagonally oriented with opposite inclination angles, such that their respective upper ends are turned towards the center of the collar (10) provided on the support (1).
• the guides (241, 251) are oriented with their upper ends converging radially towards the center of the collar (10) where the longitudinal axis of the reel (B) passes.
• the carriages (240, 250) are operated by an electric motorgear (260) that is shown in Fig.7 and Fig.9 only.
• the output shaft of the motorgear (260) drags two chains (270, 280) driven by corresponding driving pulleys (271, 281) .
• the chains (270, 280) and the motorgear (260) are inside the guides (241, 251) , that is, within the space delimited by said guides.
• Each carriage (240, 250) is connected, on its lower side, to a corresponding chain (270, 280) .
• the points where the carriages (240, 250) are connected to the chains (270, 280) are dentoted by reference numerals (272) and (282) .
• a photocell (5) On a carriage (240) there is mounted a photocell (5) whose optical axis is directed towards the reel (B) .
• the position of the photocell (5) on the carriage (240) is fixed.
• the photocell (5) is shown only in Fig.l and in the block diagram of Fig.7.
• the light beam generated by the photocell (5) is intercepted by the reel (B) as long as the distance between the same photocell (5) and the reel (B) is equal to a predetermined value (first operating condition) .
• the carriages (240, 250) and the related pulleys (24, 25) are stationary.
• the actuator (300) moves the pulley (23) to maintain the proper tension on the belts (2) while the configuration of the latter changes.
• the photocell (5) is connected to a control unit (UE) which controls the motor (260) and is equipped with a keyboard (PS) in order to set the aforesaid distance to the desired value.
• UE control unit
• PS keyboard
• the distance (d) between the follower- pulleys (24, 25) and the reel (B) remains constant while the paper web unwinds from the reel (B) .
• the upper branch (200) of the belts (2) follows the variation in diameter of the reel (B) because it raises and copies the lower side of the latter .
• the belts (2) always act in an optimal way on the same reel, copying perfectly the profile of the latter in the area (200) where they exert the drag action.
• the initial diameter of the reel (B) is 3000 mm and the final diameter is 500 mm.
• the photocell (F5) may be replaced by any other device suitable to detect the distance of the carriage (240) , and then the photocell (F5) , from the reel (1).
• the photocell (5) may be replaced by any other device suitable to detect the distance of the carriage (240), and then the photocell (5) , from the reel (B) .
• the unwinder described above comprises: - dragging means with variable configuration which act by contact on a reel (B) and are adapted to cause a rotation of the same reel about the respective longitudinal axis with a predetermined speed;
• reconfiguration means adapted to vary the configuration of said dragging means in function of the instantaneous diameter of the reel (B) ;
• the dragging means with variable configuration are constituted by the belts (2); the means of reconfiguration of the driving means are constituted by the carriages (240, 250) with the relative pulleys (24, 25) ; and the control means are constituted by the photocell (5) and the programmable unit (UE) .
• the dragging means are placed below the support (1) so as to act on the lower side of the reel (B) .

Landscapes

• Unwinding Webs (AREA)
• Replacement Of Web Rolls (AREA)
• Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
• Winding Of Webs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51951875

Family Applications (1)

Country Status (7)

Families Citing this family (2)

Family Cites Families (8)

• 2015
  • 2015-09-17 CN CN201580050987.0A patent/CN106715298A/zh active Pending
  • 2015-09-17 BR BR112017004628A patent/BR112017004628A2/pt not_active IP Right Cessation
  • 2015-09-17 EP EP15818058.8A patent/EP3197802A1/en not_active Withdrawn
  • 2015-09-17 JP JP2017515748A patent/JP2017528389A/ja active Pending
  • 2015-09-17 WO PCT/IT2015/000230 patent/WO2016046853A1/en active Application Filing
  • 2015-09-17 RU RU2017113921A patent/RU2017113921A/ru not_active Application Discontinuation
  • 2015-09-17 US US15/512,702 patent/US20170240367A1/en not_active Abandoned

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