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
  • B65H45/18—Oscillating or reciprocating blade folders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2402/00—Constructional details of the handling apparatus
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2601/00—Problem to be solved or advantage achieved
  • B65H2601/30—Facilitating or easing
  • B65H2601/32—Facilitating or easing entities relating to handling machine
  • B65H2601/321—Access

Definitions

• the invention relates to folders for folding printed products according to the preamble of claim 1, 6 or 20.
• a first longitudinal fold is usually generated before the printing material webs are broken down into individual signatures by guiding the printing material webs over folding formers, a second longitudinal fold is only formed on the individually separated signature, so that the problems of a similar nature that arise are like folding single sheets.
• folding apparatuses each of which has a folding table with a folding gap formed therein and a folding knife which can be moved up and down over the folding gap and which, during its downward movement, supplies a printed product from a lateral direction, usually parallel to the folding gap press into the gap.
• the printed product comes into contact below the folding nip, rotating rollers rotating in opposite directions, which pull the product through the folding nip and release it folded.
• a folder is known from EP 11 97 459 A2, in which a drive rod rotatably and eccentrically on one end engages on a shaft of a motor and thus moves on a circular path according to the rotation of the motor, and the second end is articulated on the in vertical rails guided folding knife attacks, so that the rotation of the motor drives the folding knife to an up and down movement with a frequency corresponding to the speed of the motor.
• a folder in which an eccentric is used to convert a motor rotation into the up and down movement of the folder is DE 101 43 042 A1.
• This device uses two rods, one end of which, in an articulated and eccentric manner, engages on a motor shaft and the other engages on a joint of a pair of toggle levers, one of the two levers of the pair connected in the joint, one at a most fixed point and the other the folding knife is articulated.
• the folding knife is also guided vertically here.
• DE 198 43 872 A1, DE 102 05 550 C1 and DE 29 17 616 C2 propose the use of linear motors to drive the folding knife.
• the linear motor which is movable transversely to the direction of movement of the folding knife, engages the joint of a pair of toggle levers, which in the course of the movement of the linear motor from one stop position to another from a bent configuration initially into a straight-line configuration and then into a mirror-image configuration passes over, so that in the course of the movement of the linear motor from one stop position to the other, the folding knife undergoes a complete up and down movement.
• the invention has for its object to provide folders for folding printed products.
• a particular advantage of the folding apparatus is that production disruptions can be easily remedied by moving the frame that carries the folding knife to the release position to eliminate the fault.
• the frame can be brought from the operating position into the release position by being pivoted about an axis which is stationary with respect to the folding table. This axis can be aligned parallel to the fold gap, perpendicular to it or in any other orientation.
• the frame can also be made displaceable with respect to the folding table, and preferably in the direction of the folding nip, so that the movement cannot be hindered by parts of a printed product that is stuck out of the folding nip.
• a drive unit preferably a rotary electric motor, via at least one eccentric.
• a particularly simple and robust coupling uses a bolt parallel to the axis of the eccentric, which engages on the folding knife on the one hand and on the eccentric on the other and is rotatable with respect to at least one of the two.
• the bolt engages the folding knife in a horizontally displaceable manner; in this case vertical guidance is required for stable movement of the folding knife.
• the pin engages at a fixed point on the folding knife, with the result that the folding knife moves on a circular path, ie the up and down movement of the folding knife is horizontal Oscillation movement superimposed.
• the folding knife is preferably coupled to two synchronously rotatable eccentrics. These can e.g. B. driven by a common belt from the same motor.
• a brake device for braking the printed products fed in the direction parallel to the folding nip is preferably also mounted on the frame.
• This braking device preferably comprises at least one endless belt or endless belt which is stretched between two rollers and faces the folding table and which carries at least one stop projection which engages in a space between the folding table and the belt.
• This belt is preferably driven in such a way that a printed product fed at high speed first hits the stop projection which moves quickly in the same direction as the printed product and this is then slowed down in order to continuously brake the printed product and bring it to rest over the nip.
• Figure 1 is a perspective view of a first embodiment of a folder in the working position.
• FIG. 3 shows a schematic section through the frame of the folder from FIG. 1 transversely to the conveying direction;
• FIG. 4 shows a side view of the folding knife of the folding apparatus from FIG. 1;
• FIG. 5 shows a side view of the folding knife according to a second embodiment of the folding apparatus
• FIG. 6 shows a section through the frame of the folder, analogous to FIG. 3, according to a third embodiment of the folder;
• FIG. 7 shows a side view of the folding knife according to the third embodiment
• FIG. 8 shows a perspective view analogous to FIG. 1 of a fourth embodiment of the folding apparatus
• FIG. 9 shows a schematic view of a fifth embodiment of the folding apparatus, seen along the conveying path
• 10 is a plan view of a folder with a braking device; -.I *>
• 11 is a side view of the braking device.
• Fig. 1 shows a perspective view of a first embodiment of the folder, in particular in a web-fed rotary printing press.
• the folding apparatus comprises a folding table 01, to which products to be folded (not shown in the figure) are fed in the conveying direction of a horizontal arrow P.
• the folding table 01 is supported here by two cross struts 02, between which two parallel walls 04 are suspended in a rotationally driven manner below a folding gap 03 of the folding table 01.
• the cross struts 02 are connected to one another by two rods 06 parallel to the conveying direction P, which carry two portal arches 07 of a frame 08 which is H-shaped in plan view.
• a longitudinal beam 09 rigidly connecting the two portal arches 07 carries a drive element 11, e.g. B. a motor 11, the drive element 12, for. B. drives a pulley 12.
• a drive element 13, e.g. B. a belt 13 is around the pulley 12 and two below the pulley 12 on the longitudinal beam 09 arranged drive element 14, z. B. pulleys 14 looped to drive the latter.
• Fig. 3 shows a cross section through the longitudinal beam 09 at the level of an axle bearing of one of these lower pulleys 14.
• the longitudinal beam 09 has a cross section in the form of an asymmetrical U-profile, from which a leg 16, which supports the pulleys 14, down into one Portal opening of portal arch 07 is extended into it.
• B. shaft 17 crosses the leg 16 and carries on the opposite side of a drive element
• the eccentric arm 18 in turn carries at its free end a cylindrical drive element 19, for. B. a bolt 19, for. B. a spigot
• FIG. 4 shows a side view of the folding knife 22, with reference to FIG. 3, from the left, the drive elements 13; hidden by the folding knife 22 or the leg 16; 14; 17; 18 are shown in dashed lines.
• the portal sheets 07 can be moved on the rods 06 in the conveying direction P between the working position of the folding apparatus shown in FIG. 1 and a release position shown in FIG. 2, in which the folding gap 03 is freely accessible from above over its entire effective length, so that a stuck printed product can be easily removed and also the folding knife 22 and its drive elements 11; 12; 13; 14; 17; 18; 19 and the leg 16 are easily accessible for maintenance purposes, in particular from below.
• FIG. 5 shows a drive mechanism for the folding knife 22 in a view analogous to FIG this limits to a purely vertical movement.
• the folding knife 22 is restricted and guided here in the conveying direction P and transversely thereto by rails 24, which here in the form of U-profiles reach around the front and rear ends of the folding knife 22 in the conveying direction P, but which also on any other projection of the Folding knife 22 could attack.
• the pins 19 engage in two horizontal elongated holes 26 in the booklet 21 of the folding knife 22, the length of which corresponds to twice the length of the arm 18, so that only the vertical component of the movement of the pins 19 is transmitted to the folding knife 22.
• FIG. 6 A further embodiment of a drive mechanism for the folding knife is shown in FIG. 6 in a section analogous to that of FIG. 3 and in FIG. 7 in a side view analogous to FIGS. 4 and 5.
• the elongated leg 16 of the longitudinal beam 09 carries here on its side facing away from the pulleys 14 a planetary gear, one of which Sun gear 27 is rotatably connected to the pulley 14, a ring gear 28 is fixedly connected to the leg 16 and of the several planet gears 29 caught between the sun gear 27 and ring gear 28 carries an eccentrically arranged pin 19 which engages the folding blade 22.
• 6 shows the folding knife 22 in a maximally raised position, in which the planet gear 29 carrying the pin 19 is located at the highest point of its path and the pin 19 on the planet gear 29 is in a six o'clock position.
• FIG. 7 shows the folding knife 22 at the lowest point of its path; the planet gears 29 carrying the pin 19 are at the lowest point of their orbit, and the pin 19 is in turn in a six o'clock position.
• the pins 19 and with them the folding knife 22 move on a triangular path shown in the right-hand planetary gear of FIG. 7 as a dash-dotted line 31, a tip of the triangle forming the lowest point of the path.
• the speed of the folding knife 22 in the conveying direction P is the lowest in the vicinity of the lowest point of the web, so that a printed product, when it is pressed into the folding gap 03 by the folding knife 22, only has a minimal force in the conveying direction P experiences.
• the rotating planet gear 29 is effective here in the manner of an eccentric 29.
• Fig. 8 shows an alternative embodiment of the frame 08 of the folder.
• the longitudinal bar 09 of the frame 08 is articulated here to one of the portal arches 07 via a hinge 32, the axis 46 of which is oriented horizontally and transversely to the conveying direction P.
• the end of the longitudinal beam 09 facing away from the hinge 32 is detachably locked to the second portal arch 07 by a bolt 33 in the working position shown in FIG. 8.
• FIG. 9 Another alternative construction of the frame is shown in FIG. 9 in a view along the conveying direction P.
• the portal bend 07 and the cross struts 02 on which the folding table 01 rests are separate parts.
• the portal bends 07 are each pivotally articulated on one side to a rod 06 acting as an axis 06, while the connection to the opposite rod 06 can be released.
• the entire frame 08 together with the folding knife 22 and its drive mechanism can, if necessary, be pivoted into the position shown in dashed lines in FIG. 9 or beyond, in order to be able to freely access the folding gap 03 or the drive of the folding knife 22.
• Fig. 9 shows a drive of the folding knife 22 via a rotating eccentric arm 18, as explained with reference to FIGS. 1 to 3, but it goes without saying that the frame construction of this embodiment - like that of FIG. 8 - with any one described or known here Drive mechanism can be combined.
• a paddle wheel is arranged under the lower gap 03. This paddle wheel is preferably driven by its own motor M, which is mechanically independent of the drive of the folding knife 22.
• the braking device comprises four pairs of pulleys 36; 37, two pairs on each side of the longitudinal beam 09, and around the two pulleys 36; 37 each pair of looped straps 34, e.g. B. timing belts or endless belts, of which a lower strand 38 runs at a short distance above the folding table 01.
• the straps 34 wear in regular intervals two or more projections 39, z. B. stops or cams, the height of which is slightly less than the distance between the lower strand 38 and the folding table 01.
• the upstream pulleys 36 and the downstream pulleys 37 are each mounted on a common roller 41 and 42, respectively is rotatably held in the leg 16 of the longitudinal beam 09.
• One of the waves 41; 42, here the shaft 41 carries an additional pulley 43 which is wrapped by a drive belt driven by a motor 44.
• the speed of rotation of the motor 44 is variable; it is controlled by a control circuit (not shown) in such a way that whenever a projection 39 enters the lower strand 38, its speed is slightly less than that of a supplied printed product. This thus gently strikes the projections 39 and is continuously braked by a subsequent deceleration of the motor 44 until it comes to rest in a desired position above the folding gap 03.
• the printed products can thus be fed at high speed without there being any risk of their damage, which allows the folder to be operated at a high clock rate.
• a first position-controlled motor 11 To drive the folding knife 22 is a first position-controlled motor 11 and for driving at least one stop 39, z. B. from at least one projection 39 carrying a belt 34, a second position-controlled motor 44 is arranged.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34894896

Family Applications (1)

Country Status (4)

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Family Cites Families (13)

• 2004
  • 2004-03-01 DE DE102004009864A patent/DE102004009864B4/de not_active Expired - Fee Related
• 2005
  • 2005-02-24 WO PCT/EP2005/050793 patent/WO2005082756A2/fr not_active Ceased
  • 2005-02-24 DE DE502005003562T patent/DE502005003562D1/de not_active Expired - Lifetime
  • 2005-02-24 EP EP05716791A patent/EP1720785B1/fr not_active Expired - Lifetime
  • 2005-02-24 AT AT05716791T patent/ATE391104T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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