EP2877326B1 - Etau pour materiau en rouleau a decouper - Google Patents

Etau pour materiau en rouleau a decouper Download PDF

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Publication number
EP2877326B1
EP2877326B1 EP13765485.1A EP13765485A EP2877326B1 EP 2877326 B1 EP2877326 B1 EP 2877326B1 EP 13765485 A EP13765485 A EP 13765485A EP 2877326 B1 EP2877326 B1 EP 2877326B1
Authority
EP
European Patent Office
Prior art keywords
series
adjustable abutments
abutments
adjustable
tissue paper
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.)
Active
Application number
EP13765485.1A
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German (de)
English (en)
Other versions
EP2877326A1 (fr
Inventor
Romano Maddaleni
Mario Gioni Chiocchetti
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.)
Fabio Perini SpA
Original Assignee
Fabio Perini SpA
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Publication date
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Publication of EP2877326A1 publication Critical patent/EP2877326A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws
    • B25B1/241—Construction of the jaws characterised by surface features or material
    • B25B1/2415—Construction of the jaws characterised by surface features or material being composed of a plurality of parts adapting to the shape of the workpiece
    • B25B1/2421—Construction of the jaws characterised by surface features or material being composed of a plurality of parts adapting to the shape of the workpiece the parts having a linear movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/163—Jaws or jaw attachments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/11—Machines or methods used for cutting special materials for cutting web rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely

Definitions

  • the present invention relates to the field of paper processing and converting machines, in particular of machines for converting so-called tissue paper to produce toilet paper, kitchen towels, or the like.
  • tissue paper converting In the field of paper converting, in particular tissue paper converting, semifinished products are produced in the form of elongated products that must be cut to-measure to obtain the products destined for packaging and consumption.
  • elongated products An example of these elongated products are the piles of interfolded napkins or handkerchiefs that exit from the interleaving machine and shall be subdivided into single packs.
  • elongated products to be cut are the rolls or log of web materials, for instance single-ply or multi-ply tissue paper, that shall be cut into rolls of smaller axial length destined for packaging and consumption.
  • logs or rolls are produced by rewinding machines receiving the web material from one or more parent reels that are unwound by an unwinder, and winding the web material again thus forming logs of diameter equal to the diameter of the products destined for consumption and of axial length equal to a multiple of the axial length of the finished rolls.
  • the logs thus obtained shall be cut into single rolls or small rolls, eliminating the head and tail trimming if necessary.
  • so-called severing machines are known, sequentially cutting each log into a plurality of rolls that are subsequently packed.
  • the severing machine comprises a device for feeding the logs along one or more adjacent channels according to a respective feeding path passing across a cutting area or station.
  • a disc-shaped cutting member, a belt cutting member, or the like cuts each log into a plurality of final rolls.
  • holding devices shall be provided for laterally retaining the logs to be cut. These devices keep the log firmly against the thrust the cutting member generates on it; the log is thus prevented from displacing laterally, i.e. orthogonally to the axis thereof, or from inclining during cutting, that could result in defective products. These devices are also called “clamps". They are usually arranged on both the sides of the cutting plane. The greater the roll diameter and the winding density, the greater the thrust onto the holding device for a log or roll of wound web material, due to the greater effort the cutting blade must exert for cutting.
  • the rewinding machines can produce logs or rolls with variable diameter, within a given dimensional range.
  • the severing machine and the devices with which it is equipped for holding logs during cut shall adapt to the diameter of the logs.
  • US-A-5647259 and US-A-5357833 describe systems for adjusting the devices for holding logs in a severing machine, so that the machine can adapt to logs of different diameters.
  • the invention relates to a severing machine for elongated products, such as particularly and preferably rolls or logs of a wound web material, especially a cellulose material such as paper, for instance tissue paper, to subdivide the rolls or logs or other elongated products into finished products of smaller longitudinal dimensions, for example and in particular to cut rolls or logs into rolls of smaller axial dimensions such as rolls of toilet paper, kitchen towels or the like.
  • the machine comprises a feeding path for the rolls to cut, a device for moving the rolls forward, and a cutting member.
  • a device for holding the elongated products to be cut is also provided.
  • the device for holding elongated products to be cut comprises at least one series of first adjustable abutments and one series of second adjustable abutments.
  • the first adjustable abutments and the second adjustable abutments are arranged on opposite sides of a feeding path for the elongated products.
  • the first adjustable abutments are arranged over one another, each of them can be adjusted independently of the others, and can be blocked with respect to one another in a working position.
  • the second adjustable abutments are arranged over one another, each of them can be adjusted independently of the others, and can be blocked with respect to one another in a working position.
  • the abutments can be adjusted in a transverse direction with respect to the feeding path; in this way each abutment can be put at a distance from the median plane of the feeding path that can be adjusted independently of the distance of the other abutments of the same series.
  • the single abutments of the two series of adjustable abutments on the two sides of the feeding path can be arranged so as to follow the profile of the elongated product to be cut.
  • This profile is substantially circular in the case of rolls of web material.
  • the adjustable abutments can be positioned to adapt to the diameter of the rolls or logs to be cut. Thanks to its structure, the holding device can adapt also to variable cross sections, not necessarily circular sections. The device is therefore also suitable for applications other than the cut of rolls.
  • This kind of device can adapt to a wide range of diameters.
  • all the range of conceivable diameters can be covered.
  • Clamping members are advantageously provided to block the adjustable abutments of the two series once they have been correctly positioned.
  • a single clamping system for all the abutments may be provided.
  • the device comprises: a first clamping member to block the first adjustable abutments with respect to one another in the working position; and a second clamping member to block the second adjustable abutments with respect to one another in the working position.
  • At least one series of adjustable abutments is arranged and designed to move synchronously with respect to the forward movement of the products to be cut, so as to clamp the product during cutting and loosen it during the forward movement between a cut and the following one.
  • one of the series of first adjustable abutments and second adjustable abutments may be advantageously carried by a movable support provided with a movement synchronized with an axial forward movement of the elongated products to be cut along the feeding path; the support reciprocally moving the first series of adjustable abutments away from the second series of adjustable abutments to release the elongated product so that it is allowed to move forward along said feeding path.
  • both the series of first and second adjustable abutments may be provided with a movement towards and away from each other, for instance mounting the two series of abutments on two supports.
  • the movement of the abutments may be a reciprocating oscillation, a reciprocating translation or a combination thereof.
  • One or two actuators may be provided to control the movement of the abutments (of one or both the series) towards and away from the product to be cut.
  • abutments provided (at least on one side of the feeding path of the elongated products) with a movement towards and away synchronized with the forward movement of the products allows also very delicate products to be processed, such as tissue paper products.
  • the grip by the abutments is released so that the elongated product, or the product obtained by cutting it, can move forward without friction or with negligible friction.
  • the device effectively holds the roll or other elongated product, thus avoiding lateral displacement thereof thanks to the movement of the abutments towards the product.
  • a system is essentially achieved allowing on one hand quick and versatile adaptation to the shape and/or transverse dimension of the products to be cut and on the other hand processing of delicate products.
  • each adjustable abutment comprises a body elongated according to the direction of the feeding path and cooperating with the elongated product to be cut.
  • each adjustable abutment comprises a clamping appendix extending from the elongated body and cooperating with blocking members to block the series of the first adjustable abutments and the series of the second adjustable abutments in the respective working positions.
  • the each clamping appendix comprises a slot extending in a direction that is substantially orthogonal to the feeding path of the elongated product to be cut and parallel to the adjusting direction.
  • At least one first blocking tie rod and preferably a first pair of blocking tie rods is inserted in the slots, put over one another, of the series of first adjustable abutments.
  • At least one second blocking tie rod and preferably a second pair of blocking tie rods is inserted in the superposed slots of the series of second adjustable abutments.
  • Spacing elements may be arranged respectively between two adjacent superposed abutments of the series of first adjustable abutments and of the series of second adjustable abutments; the spacers may also reduce friction to facilitate sliding of the abutments during the adjustment step.
  • the device may comprise a flexible member surrounding the feeding path and extending inside the series of first adjustable abutments and the series of second adjustable abutments, said flexible member being interposed between the elongated products to be cut moving forward along the feeding path and the series of first adjustable abutments and of second adjustable abutments.
  • the flexible member may be in a single piece or comprise two cooperating arched elements.
  • the flexible member is associated with a control member making the flexible member release and grip the elongated product to be cut, so as to adapt the shape of the flexible member to the transverse dimension of the product and/or alternatively to grip and loosen the product, thus facilitating its forward movement between one cut and the following one.
  • the device preferably comprises a series of third adjustable abutments and a series of fourth adjustable abutments, the series of third adjustable abutments and said series of fourth adjustable abutments being arranged adjacent to the series of first adjustable abutments and to the series of second adjustable abutments in the feeding direction of the elongated products along said feeding path, a space for the passage of a cutting member being defined between the series of first and second adjustable abutments and the series of third and fourth adjustable abutments.
  • the description below particularly refers to a severing machine for cutting logs or rolls of web material to obtain rolls destined for consumption. It should be however understood that the concepts and the novelties described herein may be also usefully applied to machines for cutting elongated products of a different kind when problems arise such as the need for a quick and easy adjustment and adaptability of the devices for holding elongated products to be cut according to the transverse dimension or the cross shape of these products.
  • the invention is advantageously applied to systems for cutting elongated product made of cellulose material, such as tissue paper, or other soft material that could be damaged when manipulated without care.
  • the described machine and device for holding elongated products may be used not only for cutting rolls or logs, but also for subdividing a row of interfolded paper products into single packs.
  • figure 1 the main components are schematically shown of a severing machine, indicated as a whole with number 1. The detailed structure of these machines is known, and will not be described in detail herein. Only the main elements will be recalled, necessary for an easier understanding of the description of the invention.
  • the severing machine 1 comprises a bearing structure 3 where a member or device 5 is arranged for moving forward the logs L coming for instance from a rewinding machine, a storage unit or the like.
  • the device 5 for moving forward the logs L comprises a continuous flexible member 7, for instance a chain, driven around a first guide member, for instance a pulley or wheel 9, and around a second guide member, for instance a pulley or wheel 11.
  • a motor, indicated schematically with 13, through a belt, a chain or the like, indicated with 15, moves forwards the continuous flexible member 7 according to the arrow f7.
  • the movement of the continuous flexible member 7 may be intermittent or continuous at constant or variable speed, as known to those skilled in the art.
  • the cutting station 21 comprises an orbiting head 23 onto which a cutting member is mounted, for instance a disc-shaped rotating blade 25.
  • the movement of the head 23 around an axis A-A, and the contemporary rotation of the disc-shaped blade 25 around an axis B-B (parallel to the axis A-A), allows, in a known manner, to sequentially cut the logs L moving towards the cutting station 21, subdividing them into single rolls R at the exit from the severing machine 1.
  • a holding device indicated as a whole with number 29, is provided in the cutting station 21 for holding the logs L while the cutting member 25 performs the cut.
  • the device 29 described in greater detail below with reference to some embodiments, holds the log L laterally against the thrust of the cutting member 25.
  • the device 29 actually comprises two portions 29A and 29B arranged in sequence along the feeding path of the logs L through the severing machine 1 at the two sides of a cutting plane, defined by the plane where the cutting member 25 lies.
  • the two portions 29A and 29B may be substantially symmetrical with respect to the cutting plane and therefore only one of them will be described in detail.
  • Figure 2 shows a cross section according to II-II of figure 1 with one of the two portions of the device 29.
  • each portion 29A, 29B of the device 29 is comprised of a series of first adjustable abutments 31A and a series of second adjustable abutments 31B.
  • the series of first and second adjustable abutments 31 A, 31B are arranged at the sides of a feeding path P of the logs L, along which the logs L move forwards pushed by the pushers 17 of the feeding member or device 5.
  • the adjustable abutments 31A and 31B are in a position where they are not yet adjusted to adapt the device to the diameter of the log L to be cut.
  • Figures 4 and 5 show two subsequent adjusting steps for the adjustable abutments 31A, 31B;
  • figure 3 shows a top view according to the line III-III of figure 2 , of a single adjustable abutment, specifically one of the abutments 31B.
  • the abutments 31A are mirror-like with respect to the adjustable abutments 31B.
  • the two series of adjustable abutments may be equivalent to each other as regards the adjustment features.
  • the first adjustable abutments 31A are put over one another, i.e. piled vertically, and carried by a first fixed support 33 arranged on one side of the feeding path of the logs L.
  • the adjustable abutment 31A are connected to one another and to the first support 33 through a pair of tie rods 35.
  • the second adjustable abutments 31B are connected to a second support 37 through a pair of tie rods 39 similar to the tie rods 35.
  • tie rods 35, 39 may be provided, for example only one tie rod or more than two tie rods for each group of adjustable abutments 31 A, 31B.
  • the second support 37 is articulated at 40 with the fixed structure 3 of the severing machine 1 and has an oscillation movement according to the arrow f37 for the purposes better explained below.
  • the oscillation movement around the articulation 40 according to the arrow f37 may be controlled by a suitable actuator, not shown, for instance an electronically controlled electric motor, a hydraulic or pneumatic piston and the like.
  • the abutment 31B has an elongated body 41 extending in the direction of the feeding path P of the logs L.
  • the body 41 has a preferably rounded front surface 41A (as shown in the cross section of figure 2 ) that, when in operating mode, comes into contact with the log L to be cut.
  • the abutment 31 B has an appendix 43, extending orthogonally to both the feeding path P of the logs L and the tie rods 39.
  • each abutment 31 A, 31 B passes through a slot 43A in the appendix 43; this slot allows adjustment, according to the arrow f31 (see figure 2 ), of each abutment 31 A, 31 B in a direction orthogonal to both the feeding path P of the logs L and the stacking direction of the abutments 31A 31B, i.e. orthogonal to the tie rods 35, 39.
  • a spacing element is inserted between each pair of consecutive adjustable abutments 31A and 31B; said spacing element is indicated with 45A for the series of first adjustable abutments 31A and with 45B for the series of second adjustable abutments 31B.
  • a further spacing element is also provided between the first adjustable abutment 31A and the heads of the tie rods 35, as well as between the first adjustable abutment 31B and the heads of the tie rods 39.
  • the spacing elements 45A, 45B may be of plastic, for instance.
  • the structure described above with reference to figures 2 and 3 is the structure of one of the two portion 29A, 29B forming the device for holding the logs L, indicated as a whole with number 29.
  • adjustable abutments 31A, 31B respective tie rods and supports, as well as spacing elements 45A, 45B are arranged double and symmetrical with respect to the cutting plane. Therefore, what illustrated with reference to figures 2 and 3 for one of the two portions 29A, 29B of the holding device 29 applies also to the other portion.
  • Figures 4 and 5 show how one of the two portions 29A, 29B of the device 29 adapts to the diameter of a log L to be cut, being understood that the other portion is adjusted in the same way.
  • the series of first adjustable abutments 31A has been adjusted to adapt to the diameter D of a log L, illustrated in the feeding path P.
  • the adjustable abutments 31A have been transversely displaced according to the arrow f31 until the front surface 41 A of each elongated body 41 of each adjustable abutment 31A has come into contact with the log L.
  • FIG. 5 shows the final step of adjusting the adjustable abutments 31A, 31B, wherein also the abutments 31B have been moved to the correct position of contact between the surface 41A of each elongated body 41 and the cylindrical side surface of the log L in the feeding path P.
  • each log L moving forwards along the feeding path P is thus engaged by the two series of first adjustable abutments 31A and second adjustable abutments 31B that laterally hold said log L preventing it from moving laterally orthogonally to the feeding direction along the feeding path P as a result of the thrust exerted by the cutting member 25 penetrating the wound web material forming the log L.
  • the adjustable abutments 31A and 31B may be held fixed in the position of figure 5 also while the severing machine 1 operates. Thanks to the shape of the surfaces 41A of the elongated bodies 41, the low friction coefficient of the adjustable abutments 31 A, 31B, as well as to the fact that the adjustable abutments 31A, 31B are in slight contact, without excessive pressure, with the log L, this log L can advance (with continuous or intermittent movement) between the adjustable abutments 31A, 31B remaining into contact with the opposite surfaces 41A of the two series of adjustable abutments 31A, 31B, without the need for moving the adjustable abutments; this allows the log L both to be held transversally effectively during cutting, and to move without excessive friction along the feeding path P between one cut and the subsequent one, or during cutting if the severing machine 1 operates with a continuous forward movement of the logs L, if necessary at variable speed.
  • At least one of the two series of adjustable abutments 31A, 31B may move synchronously with the forward movement of the logs L along the feeding path P. Said synchronous movement is schematically illustrated in figures 6 and 7 .
  • the adjustable abutments 31A and 31B are in a maximum approach position, i.e. all the adjustable abutments 31A and 31B are into contact with the log L, for instance during cutting of said log L.
  • the support 37, onto which the adjustable abutments 31B are mounted has been moved downward, with an oscillation movement around the axis 40, so as to move the adjustable abutments 31B slightly away from the cylindrical side surface of the log L.
  • the log is therefore free to advance along the feeding path P under the thrust of the pushers 17.
  • This embodiments is particularly useful when the severing machine 1 operates with an intermittent forward movement of the logs L along the feeding path P.
  • the log L is stopped and blocked ( figure 6 ) by the adjustable abutments 31A, 31B so that the cutting member 25 cuts it.
  • the abutments 31A, 31B move away from each other with a movement (arrow f37) of the support 37 so that the log L is free to advance by a pitch to be positioned in the cutting station 21 to cut the subsequent roll R.
  • FIG 8 a modified embodied is shown, wherein the support 37 has an opening and closing movement, i.e. a translating instead of oscillating movement of the abutments 31B towards and away the abutments 31A.
  • the reciprocating movement is schematically indicated with f37 again.
  • the support 37 may be configured like a slide moving along guides 38 integral with the fixed structure 3 of the severing machine.
  • Fig. 9 schematically illustrates the great ability of the device 29 (29A, 29B) to adapt to the diameter of the logs L to be cut.
  • three logs are indicated with diameters D1, D2 and D3 respectively, for instance 120, 250 and 320 mm.
  • the adjustable abutments 31B on the right in figure 9 are adjusted and put in the suitable position to hold the log of greatest diameter D3.
  • Figure 9 shows also that series with a larger or smaller number of first and second adjustable abutments 31 A, 31 B can be mounted on the severing machine depending upon the diameter of the logs to be cut, accordingly using longer or smaller tie rods 35, 39 based upon needs. It should be understood that also all the adjustable abutments 31A, 31B can be installed on the machine, for instance max. 14 abutments as shown on the right of figure 9 , putting the unused abutments in idle position, that is the position illustrated in figure 2 .
  • Figure 10 is a schematic top view of the area where the device 29 is arranged, to show in greater detail the configuration of the two portions 29A, 29B of said device 29.
  • the two portions 29A, 29B of the device 29 are substantially symmetrical with respect to the cutting plane T defined by the cutting member 25 passing through the free space between the adjustable abutments 31 A, 31 B of the portion 29A of the device 29 and the abutments 31 A, 31B of the portion 29B of the device 31.
  • the device 29 substantially comprises four series of adjustable abutments, arranged symmetrically with respect to the cutting plane T.
  • Figure 10 schematically shows also a log L moving forward according to arrow F along the feeding path P to be cut into single rolls R in the cutting station 21 of the severing machine 1, in which the device 29 is inserted.
  • Figures 11 shows a modified embodiment of the device for holding the logs to be cut.
  • the device indicated as a whole with number 29, is shown in various conditions, similarly to what illustrated in figure 9 , to process logs of different increasing diameters, a minimum diameter D1, an intermediate diameter D2 and a maximum diameter D3.
  • the same reference numbers indicate equal or equivalent parts to those of the embodiment described above, but here the spacing elements 45A, 45B between consecutive pairs of adjustable abutments 31A, 31B are not provided.
  • the adjustable abutments 31 A, 31B are in direct contact with one another. They are kept in working position by means of tie rods 35, 39, as already described above.
  • the spacing elements 45A 45B may be omitted also in the embodiment described with reference to the previous figures.
  • a flexible member 51 extends around the feeding path P of the logs; said flexible member forms a sort of arch around the log L moving forward along the feeding path P under the thrust of the pusher 17.
  • the single adjustable abutments 31A, 31B are not in direct contact with the log L moving forward along the feeding path P, as the flexible member 51 is substantially interposed between the adjustable abutments 31A, 31B and the log L.
  • the flexible member 51 may be formed for instance by a metal foil, a belt or the like.
  • the flexible member 51 may be adjusted for instance by means of a toothed wheel 53 that, rotating, increases or decreases the radius of the circumference formed by the flexible member 51 around the feeding path P, so as to adapt the conformation of the flexible member 51 to the diameter of the log L.
  • the lengthening and shortening movement of the arched portion of the flexible member 51 is indicated with f51.
  • the movement according to f51 may be not only an adjusting movement to adapt the device to the different diameters of the log L, but also a loosening and tightening movement synchronized with a movement for opening and closing the adjustable abutments 31A, 31B and with the intermittent forward movement of the log L along the feeding path P, so that the forward movement of the log L is facilitated between two consecutive cuts.
  • one end of the flexible element 51 is anchored to a fixed part of the severing machine 1.
  • the fixed part is represented for example by a profile, such as a metallic profile, indicated with 55A and arranged in the lower part of the feeding path P of the logs L.
  • a symmetrical profile 55B is arranged on the opposite side with respect to the median plane of the feeding path P.
  • the flexible member 51 may be omitted.
  • the adjustable abutments 31A, 31B are elements with significant thickness, so that along the circumferential extension of the roll L and on each side thereof a limited number of abutments can be arranged, variable according to the roll diameter, as it is clear by comparing the configuration on the right and that on the left side of the roll.
  • the adjustable abutments 31A, 31B may have a significantly reduced thickness, for instance in the order of 0.5-1.0 mm.
  • the abutments may be constituted by foils or sheets made of metal, plastic or the like.
  • profiles 55A, 55B may be also in the other embodiment, where there is not the flexible member 51.
  • the two profiles 55A, 55B define the rest and slide surface for the logs L moving forward along the feeding path P.
  • a free space, or slot, is left between the two profiles 55A, 55B, which extends longitudinally parallel to the feeding path P and along which the pushers 17 move forward.
  • two separate arc-shaped laminar elements may be provided, one anchored to the profile 55A and the other anchored to the profile 55B.
  • These arched laminar elements may surround the path P and have distal ends (i.e. opposite the ends anchored to the profiles 55A, 55B), overlapping to a certain extent according to the diameter of the logs to be cut.
  • the arched laminar elements are contained inside the envelope of the surfaces 41A of the adjustable abutments 31 A, 31B.
  • Figure 12 shows a further embodiment of the device for holding rolls or logs during cut.
  • the same numbers indicate equal or corresponding parts to those described with reference to the previous embodiments, and in particular with reference to figures 4 to 7 .
  • each adjustable abutment 31A of the series of first adjustable abutments and each adjustable abutment 31B of the series of second adjustable abutments has a contact member 32A, 32B at the end facing the feeding path of the logs L.
  • Each contact member 32A, 32B is hinged to the respective adjustable abutment 31A, 31B around a hinge axis X substantially parallel to the feeding direction of the rolls L to be cut and therefore to the feeding path.
  • each contact member may have a substantially flat surface of contact with the roll or log L to be cut.
  • the contact members 32A, 32B rotate around the axes X and take an optimal position with respect to the substantially cylindrical surface of the roll L.
  • the surfaces of the contact members 32A, 32B may be placed substantially tangential to the circumference defining the profile of the roll L.
  • the actuators 61A, 61B may be for instance pneumatic cylinder-piston actuators.
  • the two actuators may be controlled synchronously to open and close the abutments with a substantially symmetrical movement with respect to the vertical centerline plane of the roll feeding path. In some operating modes only one actuator works.
  • only one actuator may be provided, moving the adjustable abutments on only one side of the feeding path of the rolls L.
  • the actuators 61A, 61B may be connected to the supports 33 and 37, which may be in turn hinged to the fixed structure of the machine around axes XA, XB.
  • the supports 33 and 37 are equipped with adjustable stop members 65A, 65B limiting the stroke of each support 33, 37, cooperating with the machine fixed structure for instance with a crossbar 67. This avoids excessive pressure stress on the roll L during the holding step performed by the abutments 31A, 31B.
  • only one support 33, 37 is movable, only one adjustable abutment may be provided.
  • rest surfaces or profiles 55A, 55B may be provided, onto which the roll L may rest and slide during the advancing step, when it is not held by the abutments 31A, 31B.

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  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Details Of Cutting Devices (AREA)

Claims (16)

  1. Une machine pour couper des produits en papier absorbant allongés, comprenant :
    - un chemin d'amenage pour les rouleaux à couper ;
    - un organe de coupe ;
    - un dispositif pour déplacer vers l'avant le produit en papier absorbant allongé à couper, le long dudit chemin d'amenage ;
    - et un dispositif pour maintenir lesdits produits en papier absorbant allongés durant la coupe ;
    caractérisée en ce que ledit dispositif comprend au moins une série de premières butées réglables et une série de deuxièmes butées réglables ; les premières butées réglables et les deuxièmes butées réglables sont agencées sur des côtés opposés du chemin d'amenage pour les produits en papier absorbant allongés ; les premières butées réglables sont agencées les unes au-dessus des autres et chacune d'entre elles peut être réglée indépendamment des autres ; lesdites premières butées réglables peuvent être bloquées l'une par rapport à l'autre dans une position de travail ; les deuxièmes butées réglables sont agencées les unes au-dessus des autres et chacune d'entre elles peut être réglée indépendamment des autres ; et lesdites deuxièmes butées réglables peuvent être bloquées les unes par rapport aux autres dans une position de travail.
  2. Machine selon la revendication 1, dans laquelle ledit dispositif pour maintenir les produits en produit absorbant allongés durant la coupe comprend : un premier organe de serrage pour bloquer les premières butées réglables les unes par rapport aux autres dans ladite position de travail ; et un second organe de serrage pour bloquer les deuxièmes butées réglables les unes par rapport aux autres dans ladite position de travail.
  3. Machine selon la revendication 1 ou 2, dans laquelle au moins l'une desdites deux séries de butées réglables est agencée et configurée de manière à se déplacer de manière synchronisée par rapport au mouvement vers l'avant des produits en papier absorbant allongés à couper.
  4. Machine selon la revendication 1 ou 2 ou 3, dans laquelle au moins l'une de ladite série de premières butées réglables et de ladite série de deuxièmes butées réglables est portée par un support déplaçable animé d'un mouvement synchronisé avec un mouvement vers l'avant des produits en papier absorbant allongés à couper le long du chemin d'amenage ; le support éloignant l'une de l'autre la première série de butées réglables et la deuxième série de butées réglables pour libérer le produit en papier absorbant allongé de manière à lui permettre de se déplacer vers l'avant le long dudit chemin d'amenage.
  5. Machine selon une ou plusieurs des revendications précédentes, dans laquelle chaque butée réglable comprend un corps allongé suivant la direction du chemin d'amenage, coopérant avec le produit en papier absorbant allongé à couper.
  6. Machine selon la revendication 5, dans laquelle chaque butée réglable comprend un appendice de serrage s'étendant depuis ledit corps allongé et coopérant avec des organes de blocage afin de bloquer la série de premières butées réglables et la série de deuxièmes butées réglables dans leurs positions de travail respectives.
  7. Machine selon la revendication 6, dans laquelle chacun desdits appendices de serrage comprend un fente allongée dans une direction sensiblement orthogonale au chemin d'amenage des produits en papier absorbant allongés à couper, au moins un premier tirant de blocage étant inséré dans les fentes empilées de la série de premières butées réglables et au moins un second tirant de blocage étant inséré dans les fentes empilées de la série de deuxièmes butées réglables.
  8. Machine selon la revendication 7, dans laquelle une première paire de tirants de blocage est insérée dans les fentes empilées de la série de premières butées réglables et une seconde paire de tirants de blocage est insérée dans les fentes empilées de la série de deuxièmes butées réglables.
  9. Machine selon une ou plusieurs des revendications précédentes, dans laquelle des éléments d'espacement sont agencés entre deux butées adjacentes et empilées de la série de premières butées réglables et de la série de deuxièmes butées réglables.
  10. Machine selon la revendication 9, dans laquelle lesdits éléments d'espacement sont faits d'un matériau antifriction.
  11. Machine selon une ou plusieurs des revendications précédentes, comprenant un organe flexible entourant le chemin d'amenage des rouleaux et s'étendant à l'intérieur de la série de premières butées réglables et de la série de deuxièmes butées réglables, ledit organe flexible étant interposé entre les produits en papier absorbant allongés à couper se déplaçant vers l'avant le long du chemin d'amenage et les séries de premières butées réglables et de deuxièmes butées réglables.
  12. Machine selon la revendication 11, dans laquelle ledit organe flexible est associé avec un organe de commande relâchant et serrant ledit organe flexible autour des produits en papier absorbant allongés à couper.
  13. Machine selon une ou plusieurs des revendications précédentes, dans laquelle chaque butée réglable comporte un organe de contact pour toucher les produits en papier absorbant allongés à couper, chaque organe de contact étant articulé sur la butée réglable respective autour d'un axe généralement parallèle à la direction d'avancement des produits en papier absorbant allongés le long dudit chemin d'amenage, de sorte que lorsque les butées réglables sont en contact le produit en papier absorbant allongé à couper, les organes de contact soient dirigés autour des axes respectifs d'une manière optimale par rapport à la surface latérale du produit en papier absorbant allongé à couper.
  14. Machine selon une ou plusieurs des revendications précédentes, dans laquelle le dispositif pour maintenir les produits en papier absorbant allongés durant la coupe comprend une série de troisièmes butées réglables et une série de quatrièmes butées réglables, ladite série de troisièmes butées réglables et ladite série de quatrièmes butées réglables étant agencées de manière adjacente à la série de premières butées réglables et à la série de deuxièmes butées réglables dans la direction d'avancement des produits en papier absorbant allongés le long dudit chemin d'amenage, un espace pour le passage de l'organe de coupe étant formé entre les séries de premières butées réglables et de deuxièmes butées réglables et les séries de troisièmes et quatrièmes butées réglables.
  15. Machine selon la revendication 14, dans laquelle ladite série de premières butées réglables et ladite série de deuxièmes butées réglables sont symétriques par rapport à la série de troisièmes butées réglables et la série de quatrièmes butées réglables.
  16. Machine selon une ou plusieurs des revendications précédentes, dans laquelle, entre la série de premières butées réglables et la série de deuxièmes butées réglables, un canal de coulissement est agencé pour les produits en papier absorbant allongés à couper, s'étendant le long dudit chemin d'amenage.
EP13765485.1A 2012-07-27 2013-07-12 Etau pour materiau en rouleau a decouper Active EP2877326B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000155A ITFI20120155A1 (it) 2012-07-27 2012-07-27 "dispositivo per trattenere un prodotto allungato da tagliare e macchina troncatrice comprendente detto dispositivo"
PCT/IB2013/055730 WO2014016724A1 (fr) 2012-07-27 2013-07-12 Machine de coupe permettant de couper des produits allongés, comprenant un dispositif permettant de retenir les produits allongés au cours de la coupe

Publications (2)

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EP2877326A1 EP2877326A1 (fr) 2015-06-03
EP2877326B1 true EP2877326B1 (fr) 2016-06-22

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EP (1) EP2877326B1 (fr)
BR (1) BR112015001718A2 (fr)
IT (2) ITFI20120155A1 (fr)
WO (1) WO2014016724A1 (fr)

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DE102017108488A1 (de) * 2017-04-21 2018-10-25 Packsys Global Ag Ablängvorrichtung zur Herstellung von Verpackungstubenrohrkörpern, Betriebsverfahren sowie Verpackungstubenherstellsystem

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ES2634017T3 (es) * 2014-03-19 2017-09-26 Universal Tissue Technology S.R.L. Dispositivo de sujeción de rodillos y sierra de rodillos que comprende dicho dispositivo

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US2486494A (en) * 1945-04-17 1949-11-01 William A Rice Vise for holding irregularly shaped objects
IT1233279B (it) 1989-04-05 1992-03-26 Perini Finanziaria Spa Troncatrice per il taglio di bastoni di materiale cartaceo e simili
IT1252472B (it) 1991-07-31 1995-06-16 Perini Fabio Spa Congegno di ritegno a pressione (pressina) dei bastoni o logs nelle troncatrici per la produzione di carta igienica ed altro
IT1259714B (it) 1992-12-14 1996-03-25 Perini Fabio Spa Dispositivo di bloccaggio di un log per il taglio in una troncatrice e troncatrice compredente detto dispositivo
IT1265844B1 (it) 1993-02-15 1996-12-12 Perini Fabio Spa Congegno di regolazione simmetrica della pressina di ritegno per macchine troncatrici per la produzione di carta igienica ed altro
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US6557600B1 (en) * 2002-02-04 2003-05-06 Infinite Reverse Profiling Hold down apparatus for commercial wood molder
ITFI20030114A1 (it) * 2003-04-24 2004-10-25 Fabio Perini Dispositivo per trattenere temporaneamente i logs in macchine troncatrici

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108488A1 (de) * 2017-04-21 2018-10-25 Packsys Global Ag Ablängvorrichtung zur Herstellung von Verpackungstubenrohrkörpern, Betriebsverfahren sowie Verpackungstubenherstellsystem

Also Published As

Publication number Publication date
ITFI20130170A1 (it) 2014-01-28
EP2877326A1 (fr) 2015-06-03
BR112015001718A2 (pt) 2017-07-04
WO2014016724A1 (fr) 2014-01-30
ITFI20120155A1 (it) 2014-01-28

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