EP0808235B1 - Variable diameter cutter roller or glue spreading roller - Google Patents

Abstract

PCT No. PCT/EP96/00372 Sec. 371 Date Aug. 7, 1997 Sec. 102(e) Date Aug. 7, 1997 PCT Filed Jan. 30, 1996 PCT Pub. No. WO96/24471 PCT Pub. Date Aug. 15, 1996A variable-diameter knife roll is provided with a knife extending parallel to the axis of the roll placed generally radially on a diametral plane, such knife being mounted on a knife carrier able to be adjusted radially outwardly and inwardly. In order to be able to rapidly and simply set the knife roll to suit different formats the knife carrier is articulatingly connected with the joints connecting the two links of two expanding grilles or with respectively one of the arms extending past such joints, of one of the links of the two expanding grilles. Respectively one inner joint of a link of one of the two expanding grilles is arranged fixedly on a knife roller shaft and the respectively other inner joint of the other link is arranged for adjustment in the axial direction on or in the knife roll shaft.

Description

The invention relates to a diameter (cf. US 4,872,382 A) which can be changed Knife roller with one extending parallel to the roller axis and knives standing radially on a diameter plane, that on a radially outward and inward adjustable knife carrier is attached.

Knife rollers for making cross cuts or cross cuts Perforation cuts are in different embodiments known. Under "knives" are both smooth cuts as well as knives that perform perforated lines. According to the different formats of workpieces and preferably bag workpieces must have sheets of paper or plastic at different intervals with cross sections and in particular with cross perforation cuts. It is hence a need to cut knife rollers quickly and easily to different To be able to set formats.

The object of the invention is therefore a knife roller of the beginning to create specified type that is quick and easy to different formats, i.e. to different distances to be carried out on a continuously conveyed track Cuts, adjust.

According to the invention, this object is achieved with a knife roller of the generic type Art solved in that the knife holder with the the two links connecting two scissor lever joints or each with one of the arms protruding from these joints one of the Handlebar of the two scissor levers is articulated and that each an inner joint of a handlebar one of the two scissor levers firmly on a cutter block shaft and the other inner joint of the other handlebars adjustable in the axial direction or is arranged in the knife roller shaft. The radial distance of the knife holder and thus the format of a web to be separated or separated by cross perforation lines Sections can be in through the knife roller according to the invention simply by adjusting one of the inner joints the handlebars of the scissors levers adjust in the axial direction.

The knife roller shaft is expediently a hollow shaft, in which a slide arrangement is guided axially displaceably which arranged the adjustable inner joints of the other handlebars are, the slide assembly with an actuator is provided.

The actuator can be connected to the slide assembly Spindle nut and an adjustment screw that can be screwed into this consist.

To make the radial adjustment of the knife carrier, you can the spindle is immovable in the axial direction relative to the hollow shaft held and after loosening a holding or locking device be rotatable relative to this.

According to a preferred embodiment it is provided that the Spindle on a radially extending carrier of the hollow shaft in this is freely rotatably mounted on an end section the spindle is a non-rotating and axially displaceable bush is stored, which is on an annular shoulder on a Counter ring shoulder of the hollow shaft or one connected to it Braking housing can support and that of a section enclosing compression spring is applied, the one hand on the socket and on the other hand on a collar or on supports a nut screwed onto the spindle, and that a device for moving the socket out of its braking position is provided for non-rotatable holding of the socket. This Embodiment of the invention enables simple adjustment the knife holder in that when pressed and rotatable held sleeve, the hollow shaft is rotated so that on the Spindle nut moved the slide assembly in the hollow shaft and the knife carrier is adjusted in the desired manner.

The device for moving away and holding the socket can a pressure-piston-cylinder unit arranged fixed to the frame exist, the piston rod of a non-rotatable coupling with claws, which engage in receptacles of the socket, these are non-rotatable hold and push out of their braking position. The braking effect to increase, is expediently between the ring shoulder and the counter ring shoulder is a brake ring made of friction-increasing Material inserted.

According to an advantageous embodiment it is provided that the Hollow shaft is driven by a controllable stepper motor. This stepper motor can be controlled by a computer in this way be that the hollow shaft for adjusting the knife carrier is rotated to a position in which the claws of the coupling piece aligned with the receptacles of the socket. Are the claws in the receptacles of the socket retracted and the claws have the Pushing the socket out of its braking position can via the Computer the hollow shaft is rotated through a certain angle, to effect the desired radial adjustment of the male connector.

Of course, several can be on the cutter block shaft Knife holder can be held adjustable. Are preferably mirror images to a diameter plane of the cutter block shaft two Knife holder holding scissor levers arranged, the inner Handlebars are mounted on common pins. Offset by 90 ° These two knife carriers can hold two more knife carriers be arranged adjustable in the same way.

The knife carriers are expediently made up of two in pairs arranged scissor levers worn, for stability the knife carrier increased.

In a further embodiment of the invention it is provided that Knife is attached to a male header by pairs Clamping levers mounted on the side of the knife carrier can be released with this connected is. This arrangement enables quick replacement the knife when these have become blunt or a another cut or perforation cut is desired.

The clamping levers expediently consist of pivotable on the Knife carrier mounted angle levers, each of which is supported by a Compression spring is applied in the opening direction and one after has inside pointing arm, on which the clamping lever in his Device holding the locking position attacks. This Device can be axially displaceable in the knife carrier guided locking rod or consist of a slide, which is provided with cams or rollers for locking the clamping lever on ramp surfaces of their inner arms come up and can be moved to unlock them. The Slider can be loaded by a spring in the unlocking direction and in its locking position detachable from one in its Be held above dead center position pivotable lever.

An adhesive application roller can also be used in the same way as the knife roller be designed, the format is a continuous Web with adhesive applications or transverse adhesive applications provides. According to a further embodiment of the The invention is therefore provided for the knife holder to be a holder for an adhesive application bar.

Fig. 1

eine Anlage zur Herstellung von mehrlagigen Schlauchstücken aus Papier ausgehend von von Vorratsrollen abgezogenenen Papierbahnen in schematischer Seitenansicht, in der die erfindungsgemäßen, in ihrem Durchmesser veränderbaren Messerwalzen zum Einsatz kommen,

Fig. 2

eine Seitenansicht einer Messerwalze, teilweise im Schnitt,

Fig. 3

den in Fig. 2 eingekreisten Teil in vergrößerter Darstellung,

Fig. 4

einen Querschnitt durch einen Messerträger mit einer an diesen angeklemmten, ein Messer tragenden Leiste,

Fig. 5

eine Draufsicht auf den Messerträger in Richtung des Pfeils V in Fig. 4, teilweise im Schnitt, und

Fig. 6

einen Schnitt durch den Messerträger längs der Linie VI-VI in Fig. 4.

An embodiment of the invention is explained below with reference to the drawing. In this shows

Fig. 1

1 shows a schematic side view of a plant for the production of multi-layer pieces of hose made of paper starting from paper webs drawn off from supply rolls, in which the knife rollers according to the invention, whose diameter can be changed, are used,

Fig. 2

a side view of a knife roller, partially in section,

Fig. 3

the part circled in Fig. 2 in an enlarged view,

Fig. 4

3 shows a cross section through a knife carrier with a bar which is clamped to it and carries a knife,

Fig. 5

a plan view of the knife carrier in the direction of arrow V in Fig. 4, partially in section, and

Fig. 6

a section through the knife carrier along the line VI-VI in Fig. 4th

The plant shown in Fig. 1 for the production of multilayer Tubing sections made of paper consist of four in a row arranged racks in which paper rolls are stored by from which the paper webs are withdrawn, from which the multilayer Hose sections are made.

From Fig. 1 only a frame 1 can be seen, in which a paper roll 2 is freely rotatable, one of which is attached to guide rollers 3, 4 running paper web 5 is withdrawn. About the paper roll 1 is placed a band 7 loaded by a weight 6, which is held fixed to the frame in the manner shown and the braking of the paper roll 2 is used. The unwinder is a known type and is therefore not described in detail. The paper webs 5 ', 5' 'and 5' '' are not shown by Paper rolls peeled off in the same way in the Processing racks are attached. The paper webs 5 to 5 '' 'are drawn into a frame 8, in the needle rollers and knife rollers providing the webs with transverse perforation cuts are stored. Since all paper webs are processed in the same way only those processing web 5 will be described below Rolls described.

The web 5 is driven into the frame 8 by a driven preferred device retracted from the driven feed roller 9th and the guide roller 10 which increases the wrap angle. From the preferred rollers 9, 10, the web runs over a counter-pressure roller 11 to which one of the in a rotatable turret rotatable needle rollers 12 is adjustable, which the Web either over its entire surface or in strips with pinholes provides the venting of the manufactured from the webs Serve sacks. Because the pinholes of the individual sheets 5 to 5 '' 'after aligning the sheets, do not align, labyrinthine ventilation channels are created through which can escape the air but not the goods.

The storage of the needle rollers in a revolver serves for quick Change the needle rollers when their needles become blunt or if there is a change in the areas to be needled the paper webs should be made.

The paper webs run from the needle rollers to the knife roller 20, which is employed on a counter-pressure roller 21. The knife roller 20 and the counter-pressure roller 21 are shown in FIGS 6 described in more detail. From the stand 8 run with pinholes and cross perforation lines provided paper webs in a stand 22 in which the paper webs 5, 5 'and 5' 'on both sides the cross perforation cuts by glue application rollers 23 can be provided with transverse adhesive strips.

The paper webs provided with the glue applications are then merged in the manner shown via deflection rollers 24, in such a way that the individual webs are laterally offset from one another lie. The uncovered side areas of the paper webs are then of adhesive application discs 25 with longitudinal adhesive applications. The tracks are then in a tube forming station 26 to one Paper tube folded in such a way that due to the longitudinal adhesive strips each of the layers of paper with itself into one Glued hose so that from the paper webs enclosing each other Result in paper tubes. The paper tube thus formed then runs in a known manner in a paper tube preferential and at the same time with preferential speed holding preferred movement 27 a. This preference 27 is a tearing mechanism 28 rotating at a higher speed is connected downstream, that cuts through the perforation lines and thereby tears off the individual tube pieces from the tube track, which then processed into sacks. Also the preferred work 27 with tear-off 28 is a known type and needs therefore not to be described in more detail here.

The knife roller 20 will now be described in more detail with reference to FIGS. 2 to 6.

The knife roller 20 consists of a hollow shaft 30 which in the Side parts 31, 32 of the frame 8 in the manner shown is rotatably supported by roller bearings. The left end of the cutter block shaft 30 is provided with a drive pulley 33, via the knife roller shaft 30 from a not shown Stepper motor, which is controlled by a computer, driven becomes.

In the bore 34 of the hollow shaft 30 there are slide rods 35, 36 longitudinally guided, a spindle nut at its right end 37 wear. A spindle 38 is in the spindle nut 37 screwed in, which is described in more detail below with reference to FIG. 3 becomes.

On radial attached to the hollow shaft 30 at a distance from each other Pins 40, 40 ', two links 41, 42 and 41', 42 'are pivotable stored. On the sliders 35, 36 are connecting to them Cross pieces pins 43, 43 'attached to the jacket of the Hollow shaft 30 in elongated holes spaced from each other Push through 44, 44 '. The inner ones are on these pins 43, 43 ' Ends of links 45, 45 'and 46, 46' mounted. The handlebars are in the manner shown in the joints 47, 48 and 47 ', 48' articulated with each other by hinge pins, not shown connected, with outer arms of the links 45, 45 'and 46, 46 'project the joints 47, 48 and 47', 48 'radially outwards. The scissor levers formed by the handlebars are mirror images to one through the pivot pins 40, 43 and 40 ', 43' arranged diameter plane of the hollow shaft. The Hollow shaft 30 is corresponding on the opposite side Way with aligned scissor levers, each outer ends of the longer handlebars of the scissor levers in the Articulation points 50, 51 and 50 ', 51' with the knife carriers 52, 52 ' are connected. The knife carriers 52, 52 'hold on a common one Perforating knife lying on the hollow shaft 30 53, 53 ', the perforation cuts on the between the Knife roller 20 and the counter-pressure roller 21 continuous paper web To run. The counter-pressure roller 21 is adjustable in the frame 8 stored and provided with an elastic jacket 55, into which the perforating knife is used to make the perforation cuts can impress.

The adjustment mechanism of the knife roller is now used in more detail 3 described. The right end of the hollow shaft 30 is via bearings 56 in a bearing bush 57, which in the Side wall 32 of the frame 8 is attached. The camp 56 projecting end of the hollow shaft is fixed with a washer 58 connected, which is a cylindrical section-shaped housing part 59 carries that at its right end with an inward facing Ring shoulder 60 is provided, the inner edge of a through hole 61 limited. In a middle bearing bore the Disk 58, the spindle 38 is freely rotatable by a roller bearing 62 stored. The spindle 38 carries adjacent to the inner one Side of the disc 58 an annular collar 63 over which the spindle 38 can slide on the disc 58. Instead of this A plain bearing could also be one consisting of a roller bearing Thrust bearing may be provided.

The spindle 38 carries a smooth-walled at its right end Shaft journal 65, which is provided with a longitudinal keyway 66 is. The shaft section 65 is axially displaceable but non-rotatably guided a socket 67, which also with a Keyway is provided, one in the aligned keyways Wedge is used as an anti-rotation device. The socket 67 is on its inner end with a flange-widening Provide ring 68. Between the annular shoulder 60 of the housing 59 and the collar-like widening 68 of the bush 67 is a Brake ring 69 inserted. Following the pin 65 is the Spindle 38 provided with a threaded portion 70, on the two locking nuts 71, 72 are screwed on. Between Nuts 71, 72 and the bushing 67 is pushed onto the pin 65 Compression spring clamped, the bushing 67 to the outside tries to push and thereby brakes on the ring shoulder 60 holds on. To adjust the bias of the compression spring 63 can the locking nuts 71, 72 are adjusted. The Bushing 67 passes through the bore 61 and has an annular shape End face expanding funnel-shaped receiving holes 75, in which the claws 76 of a coupling piece 77 engage can. The coupling piece 77 is non-rotatable on the piston rod 78 of a pressure medium cylinder 79 arranged over a angled support piece 80 is connected to the bearing bush 57. The piston rod 78 is rotatably guided in the cylinder 79.

For setting the radial distance between the knife carriers 52, 52 ' the hollow shaft 30 controls it via the computer Stepper motor rotated into a position in the pin 76 of the coupling part 77 are aligned with the recesses 75. Then the Piston rod 78 extended axially so that the bushing 67 cannot rotate is coupled to the coupling piece 77 and the coupling piece 77 the sleeve 67 moves to the left, so that the collar 68 lifts off the brake ring 69 and the hollow shaft 30 relatively to the spindle 38 is freely rotatable.

The hollow shaft is then controlled by the computer Stepper motor rotated through an angle that the desired radial Setting of the knife carriers 52, 52 'corresponds. Is the corresponding one Adjustment has been made, the coupling piece moves 77 off, so that the brake engages and over this the spindle is non-rotatably coupled to the hollow shaft.

The knife carriers 52, 52 'can be seen in FIG. 2 Way with switching flags 84, 85 provided with fixed to the frame Initiators 86, 87 cooperate and thereby limit switches as it were form. The inner initiator 86 limits the retracted one Position of the male connectors and the initiator 87 the largest extended Position.

4 is a section through the knife carrier 52 along the Line IV-IV in Fig. 2 can be seen. The knife holder is in the 5 apparent on opposite sides Sides with at least two bearing pieces forming bearing forks 80, 81 and 80 ', 81' provided in their bores axes 82, 82 'are supported, on which angled clamping levers 83, 83 'are pivotally mounted. The swivel levers overlap with one arm 84, 84 'the knife carrier 52 and clamp this a cylindrical shell-shaped bar 85 fixed carries the perforating knife 53 in the center. To ensure a good circulation of the To ensure bar 85 on the knife holder, this has an approximately trapezoidal upper profile. Arms 84, 84 'of Clamp levers are provided with bores 86, 86 'in which compression springs 87, 87 'are held on the one hand on the bottom the holes and on the other hand on the sides of the knife carrier support.

The knife carrier 52 is groove-shaped on its underside Provide recess in the longitudinally displaceable in slide 90 is led. This slide carries a distance from each other on its underside axes 91, on its two ends Axle journal rollers 92, 92 'are freely rotatable. In the area this roller is the knife carrier 52 with transverse grooves 93, 94 provided by the inwardly angled arms 95, 95 'of the clamping lever. The angled arms are on their ends with wedge-shaped ramp surfaces 96 which are in the area of the rollers 92, 92 ', so that by sliding of the rollers on these run-up surfaces by appropriate Move the slider 90, the clamping lever in its from Fig. 4 visible position can be locked. By moving the Slide 90 in the opposite direction come the angled inwards Arms 95, 95 'free from the rollers so that the compression springs 87, 87 'pivot the clamping lever outwards and thereby the release the knife-carrying bar 53 so that it can be used if necessary can be replaced easily and quickly.

The slide 90 protrudes in the manner shown in FIG. 2 the knife carrier 52, 52 'and is angled at its end 99 provided, between this and the front of the Knife holder 52 a compression spring 100 is clamped, the Slider 90 is loaded into a position releasing the clamping lever. The slider 90 also projects beyond the knife carrier 52 its opposite side. At this is on the slider a lever 102 is pivotally mounted on its free side inside protruding end carries a roller 103. To the side of the Slider 90 is the right end face of the knife carrier 52 provided with a stop 104 on which the pressure spring 100 acted slide in its blocking the clamping lever 83, 83 ' Position in an over-center position shown in FIG. 5 is held. The locking lever is used to release the clamping lever 32 from the position shown in FIG. 5 in the counterclockwise direction pivoted until it releases the slide 90. A stop 106 is provided on the slide 90, which defines the insertion path of the slider in the knife carrier limited. This insertion path corresponds approximately to the length of the ramp 96, see above that the released by the locking lever 102 slide through the Compression spring 100 is shifted to the left in a position the clamping levers 83, 83 'release the male connector 85.

Claims (14)

1. Variable-diameter cutter roller (20) having a cutter (53, 53') which extends parallel to the axis of the cutter roller, stands approximately radially on a diametral plane and is fastened to a cutter carrier (52, 52') which can be adjusted radially outwards and inwards, characterized in that the cutter carrier (52, 52') is hinge-connected to the hinges (47, 48, 47', 48') connecting the two links (45, 45', 46, 46') of two scissor-action levers (45, 45', 46, 46', 41, 41', 42, 42') or to in each case one of the arms projecting beyond these hinges and belonging to one of the links (45, 45', 46, 46') of the two scissor-action levers (45, 45', 46, 46', 41, 41', 42, 42'), and in that in each case an inner hinge (40, 40') of a link (41, 41', 42, 42') of one of the two scissor-action levers is fixedly arranged on a cutter-roller shaft (30), and the respective other inner hinge (43, 43') of the other links (45, 45', 46, 46') is arranged to be adjustable in the axial direction on or in the cutter-roller shaft (30).
2. Cutter roller according to Claim 1, characterized in that the cutter-roller shaft (30) is a hollow shaft, in which a slider arrangement (35, 36) is axially displaceably guided and on which the adjustable inner hinges (43, 43') of the other links (45, 45', 46, 46') are arranged, and in that the slider arrangement is provided with an actuating drive (37, 38).
3. Cutter roller according to Claim 2, characterized in that the actuating drive comprises a spindle nut (37) connected to the slider arrangement (35, 36) and an adjusting spindle (38) which can be screwed into the said nut.
4. Cutter roller according to Claim 3, characterized in that the spindle (38) is held such that it cannot be displaced in the axial direction relative to the hollow shaft (30) but can be rotated relative to the latter after a holding or locking device (60, 68) has been loosened.
5. Cutter roller according to Claim 3 or 4, characterized in that the spindle (38) is mounted on a radial carrier (58) of the hollow shaft (30) so that it can rotate freely in the latter, in that, on an end section of the spindle (38), a bush (67) is mounted such that it cannot rotate but can be displaced axially, can be supported so as to be braked by an annular shoulder (68) on a mating annular shoulder (60) on the hollow shaft (30) or on a housing (59) connected to the latter, and is acted on by a compression spring (73) which encloses the section and is supported at one end on the bush (67) and at the other end on a collar or a nut (72) screwed onto the spindle nut, and in that a device (76, 77) is provided to move the bush (67) out of its braking position and to hold the bush (67) so that it cannot rotate.
6. Cutter roller according to Claim 5, characterized in that the device for moving the bush (67) comprises a pressure-medium piston-cylinder unit (79) which is arranged to be fixed to the frame and whose piston rod (78) bears a coupling piece (76, 77) which is held so that it cannot rotate and has claws which engage in recesses (75) in the bush (67), hold the latter so that it cannot rotate, and press it out of its braking position.
7. Cutter roller according to either of Claims 5 and 6, characterized in that a braking ring (69) is inserted between the annular shoulder (68) and mating annular shoulder (60).
8. Cutter roller according to one of Claims 2 to 7, characterized in that the hollow shaft (30) is driven by a controllable stepping motor.
9. Cutter roller according to one of Claims 1 to 8, characterized in that two scissor-action levers which hold two cutter carriers (52, 52') are arranged in mirror-image fashion with respect to a diametral plane of the shaft (30), their inner links being mounted on common pins (40, 43, 40', 43').
10. Cutter roller according to one of Claims 1 to 9, characterized in that the cutter carriers (52, 52') are each carried by two scissor-action levers arranged in pairs.
11. Cutter roller according to one of Claims 1 to 10, characterized in that the cutter (53, 53') is fastened to a cutter bar (85), which is detachably connected to the cutter carrier by clamping levers (83, 83') arranged laterally in pairs on the latter.
12. Cutter roller according to Claim 11, characterized in that the clamping levers comprise angled levers (83, 83') which are mounted such that they can pivot on the cutter carriers, of which each is acted on in the opening direction by a compression spring (87, 87') and has an inwardly pointing arm (95, 95') on which there acts a device which holds the clamping levers in the locked position of the arm.
13. Cutter roller according to Claim 12, characterized in that the device comprises a locking rod or a slider (90) which is guided such that it can be displaced axially in the cutter carrier (52) and is provided with cams or rollers (92, 92') which, in order to lock the clamping levers (83, 83'), run onto contact surfaces on the inner arms of the latter and can be moved off these for the purpose of unlocking.
14. Cutter roller according to Claim 13, characterized in that in the unlocked position, the slider (90) is loaded by a spring (100), and in its locked position is releasably held by a lever (102) pivoted into its over-centre position.

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