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
  • B65H45/16—Rotary folders
  • B65H45/162—Rotary folders with folding jaw cylinders
  • B65H45/165—Details of sheet gripping means therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/10—Selective handling processes

Definitions

• the invention relates to folders according to the preamble of claim 1 or 2.
• a puncture cylinder has - in particular retractable - puncture needles on its circumference, which receive the strand, which is further cut by a section after further conveyance. The following section is picked up by the puncture needles following the circumference and cut in the same way. No section in the circumferential direction is required between the sections following the circumference, so that the puncture cylinder can have the same circumferential speed as the conveying speed of the strand.
• Point cylinder and subsequent cylinder - e.g. B. jaw cylinder can have the same scope.
• a gripper cylinder carries on its outer surface one or more grippers, which are between a position in which they have a leading end of one on the gripper cylinder Hold the conveying piece of flat material against the outer surface, and move a release position in which the flat material can detach from the cylinder again or a new piece of flat material can be picked up and clamped.
• the grippers pivot between these two positions. Since the time available for clamping or releasing a product is short, the swiveling movement must have a high speed, and the amplitude of movement between the clamping position and the release position of the gripper should be as small as possible in order to limit material-intensive accelerations hold.
• most gripper cylinders are designed to accommodate pieces of flat material that the gripper cylinder respectively are supplied spaced from each other, so that the flat material pieces each create a gap between successive pieces on the gripper cylinder and the gripper can move in the gap without touching the previous piece. If these pieces of sheet are previously made by cutting from a continuous strand, the cut pieces must be accelerated to a speed higher than that of the strand before cutting to create such a space.
• the pieces of flat material are composed of a stack of sheets which are not connected to one another, the problem arises that different friction on the different sides of the stack can cause the sheets to be displaced relative to one another and the stack to be pulled apart, which considerably increases the further processing of the stack difficult.
• a gripper cylinder which is capable of conveying printed products separated from a supplied strand without leading, that is to say without a gap between the successive printed products.
• a gripper is mounted on a shaft pivotably mounted in the cylinder via a translation mechanism, which drives the gripper coupled to the pivoting movement for a parallel displacement.
• This translation mechanism serves to To move the gripper between its retracted position and a projecting position over the lateral surface of the cylinder, from which it can be pivoted around the shaft to press the leading edge of a strand of printed matter against the cylinder surface.
• the invention has for its object to provide folders.
• the folder is constructed regardless of the type - gripper or pin needles.
• the first cylinder can be easily replaced without having to change the frame and drive situation.
• a choice between the two types can be made. This choice can be made until shortly before delivery to the customer or it can be converted on site without the frame having to be replaced.
• the present gripper cylinder uses a translational movement to shorten the movement between the retracted position and the clamped position of the gripper in addition to the pivoting movement, but with the difference that a mechanism that drives the translation does not change together with the gripper whose pivot axis is pivotable and thus increases its moment of inertia, but shifts the axis of the gripper as such in the radial direction.
• the flat material to be clamped by the gripper is a stack of sheets
• the clamping only comes about through a swiveling movement of the gripper and thus the application of a shear force on a sheet stack when clamping is unavoidable
• a simple and robust way of driving the radial inward movement of the first axis is to mount it on a first arm which can be pivoted about a second axis which is stationary with respect to the cylinder body, so that the radial movement of the corresponds to the first axis of a pivoting movement of this first arm.
• This pivoting movement of the first arm can, like conventionally the pivoting movement of the gripper itself, be driven in a simple manner by a cam disk which does not rotate together with the gripper cylinder and whose shape is sensed by a lever connected to the first arm.
• a coupling rod is preferably provided which is articulated on the one hand on the gripper and on the other hand on a second arm which can be pivoted about a third axis. As indicated above, its pivoting movement can also be driven by a cam disk.
• the second and third axes are located on opposite sides of the gripper in relation to the circumferential direction of the cylinder.
• the first is oriented more in the circumferential direction and the second more in the radial direction of the cylinder body, in other words, the orientation of the first arm is closer to the circumferential direction than that of the second, and that of the second is closer to that radial direction than that of the first.
• An abutment is preferably assigned to each gripper on the cylinder body, which serves in cooperation with a knife moved together with the gripper cylinder for cutting material supplied by the gripper cylinder and to be gripped by the gripper.
• the gripper In relation to the direction of rotation of such a gripper cylinder, the gripper is arranged in front of the abutment assigned to it, and the surface section of the gripper cylinder against which the gripper presses cut flat material is preferably its Abutment itself, the elasticity of which supports both the cutting process and the gripping.
• Figure 1 is a schematic representation of a cross folder using a gripper cylinder.
• Figure 2 is an enlarged partial section through the gripper cylinder, showing the gripper in its lowered position.
• Fig. 3 is a partial section analogous to that of Figure 2, which shows the gripper during extension from the lowered position.
• Fig. 4 is a partial section showing the gripper in the clamping position
• Fig. 5 is a partial section showing the gripper on the way back to the lowered position
• Figure 6 is a schematic section through a folder.
• Fig. 7 is a schematic side view of a double folder.
• Fig. 1 shows a highly schematic section through a folder 28 according to the present invention.
• the folder 28 comprises a cylinder 01, e.g. B. a gripper cylinder 01, in the example shown here, each with five in the circumferential direction evenly distributed grippers 02 and folding knives 03.
• the gripper cylinder 01 forms together with a knife cylinder 04, here with two knives
• the peripheral speed of the gripper cylinder 01 corresponds exactly to the feed speed of the strand 07, so that the printed products 08 cut off from the strand 07 follow one another without gaps on the circumference of the gripper cylinder 01.
• the grippers 02 After passing through the cutting gap 09, the grippers 02 are each extended below the trailing section 11 of one of the printed products 08 from the gripper cylinder 01 and pivoted against their direction of rotation in order to clamp the leading edge 12 of the strand 07 on the surface of the gripper cylinder 01.
• the trailing sections 11 of each printed product 08 are thus spread apart a little from the surface of the gripper cylinder 01, but this does not impair the uniform winding of the strand 07 onto the gripper cylinder 01, since they are spread apart by the gripper cylinder 01 only after being cut off.
• the gripper cylinder 01 forms a folding nip 13 with a second cylinder 14, e.g. B. a folding jaw cylinder 14.
• the folding knives 03 extend out of the gripper cylinder 01 in order to print the printed products 08 along a center line in folding jaws of the folding jaw cylinder 14 (not shown) introduce.
• the printed products 08 folded transversely in this way are conveyed on the folding jaw cylinder 14 to a point where they are transferred, for example, to a paddle wheel (not shown) for laying out on a conveyor belt.
• Fig. 2 shows a partial section transverse to the axis of the gripper cylinder 01 a gripper 02 and its surroundings.
• the gripper 02 comprises a support beam 16 which extends over the entire usable width of the gripper cylinder 01 and on a radially outward side carries a double L or Z profile 17 made of an elastic material such as spring steel, which is used to clamp the Print products 08 is extendable.
• the profile 17 can extend continuously in the axial direction of the gripper cylinder 01 or can be divided into a plurality of tines spaced apart in the axial direction, each of which grips through an opening in the jacket of the gripper cylinder 01.
• the support beam 16 is articulated on the one hand to a first arm 19 which is fixedly connected to a shaft 21 which is rotatably mounted in the gripper cylinder 01.
• the first arm 19 extends approximately parallel to the outer surface of the gripper cylinder 01.
• the support beam 16 is also articulated to a coupling rod 22, which is likewise oriented approximately parallel to the outer surface of the gripper cylinder 01 and in turn articulated to an approximately radially oriented second arm 23 is.
• This second arm 23 is fixedly connected to a shaft 24 which is rotatably mounted in the gripper cylinder 01.
• the rotational position of the two arms 19; 23 is fixed in a manner known per se and not shown in FIG. 2 via two cams which do not rotate together with the gripper cylinder 01 and which are scanned by an arm (not shown) connected to the shaft 21 or 24.
• the gripper cylinder 01 shown in detail in FIG. 2 rotates counterclockwise. In a clockwise direction behind the opening 17 of the cylinder jacket receiving the profile, a hard rubber strip is let into the surface section 26, e.g. B. serves as an abutment strip 26 for the knife 06 of the knife cylinder 04 when cutting the strand 07.
• the gripper 02 in which the gripper 02 is sunk into the inside of the gripper cylinder 01, the gripper 02 can pass through the cutting gap 09, the strand 07 (not shown in FIG. 2) being severed at the abutment strip 26 , In order to grip the resulting leading edge 12 of the strand 07 and to press it against the abutment strip 26, the gripper 02 is moved out of the gripper cylinder 01.
• Fig. 3 shows an intermediate position during extension.
• the shaft 21 has clearly rotated counterclockwise, as a result of which the axis 27 has been displaced radially outward and the profile 17 of the gripper 02 has emerged from the opening of the cylinder jacket.
• the gripper 02 is also pivoted clockwise about the axis 27, so that the tip of the free leg 18 of the profile 17 lies radially above the abutment strip 26.
• the axis 27 of the gripper 02 is again radially displaced into the interior of the gripper cylinder 01, so that the free end of the profile 17 lowers on the abutment strip 26 and thereby between itself and the abutment strip 26 leading end of the strand 07 (not shown in FIG. 3) is jammed.
• the gripper 02 After the passage of the gripper 02 through the gap 13, the gripper 02 is through a rotation of the shaft 21 in the counterclockwise direction is raised again and the printed product 08 clamped between the free end and the abutment strip 26 is released, as shown in FIG. 5 (shown without the printed product 08).
• the shaft 24 pivots counterclockwise to pull the free leg 18 of the gripper 02 over the abutment strip 26 and over the opening of the cylinder jacket.
• the gripper 02 By subsequently rotating the shaft 21 clockwise, the gripper 02 is pulled back into the interior of the gripper cylinder 01, into the position shown in FIG. 2.
• the gripper 02 is now ready for a further passage through the cutting gap 09.
• a small swivel angle of the gripper 02 is sufficient to be able to move it between the clamping position and the lowered position, and the radial stroke is also limited to a few millimeters, depending on the thickness of the printed products 08 to be processed. Since the gripper 02 can be simply constructed, its weight and moment of inertia are low. The short strokes between the retracted position and the clamping position of the gripper 02 require low accelerations and therefore moderate, material-saving drive forces.
• the folding apparatus 28 has, as already shown in FIG. 1, a first cylinder 01, here initially generally referred to as a folding knife cylinder 01, and a second cylinder 14, a folding jaw cylinder 14.
• the cylinders are cylinders 01; 14 are mounted in a common frame 29 and are driven by at least one drive motor 31.
• the drive takes place, for example, from the drive motor 31 via a gearbox or also axially directly to the first cylinder 01 and from there via a schematically indicated drive connection 33 (e.g. gearwheels) to the second cylinder 14.
• the folder 28 is now designed such that it is in an embodiment with a as a gripper cylinder 01 and in a second embodiment with a first cylinder 01; 32 is formed, wherein this gripper cylinder 01 and this puncture cylinder 32 are designed to accommodate the same section lengths.
• the optionally used gripper cylinder 01 has the same circumference as the interacting jaw cylinder 14.
• the same applies to the selectively used puncture cylinder 32 is accomplished, for example, through the use of the gripper mechanism shown above.
• the design of the folder 28 is such that for the optional use of the gripper cylinder 01 and the pin cylinder 32, their arrangement with respect to the frame 29 is the same.
• the axes of rotation R01; R32 and R14 between the first and second cylinders 01; 32; 14 have the same distance a (for the same section format) for both embodiments and are preferably in the same relative position with respect to the frame 29 for both embodiments.
• the configurations and positions of the drive train 33 and / or the positions of the drive motor 31 preferably also correspond for the two embodiments. If gear connections are arranged as drive train 32 between cylinders 01 and 14 or 32 and 14, the gear wheels of first cylinder 01 ⁇ 32 and second cylinder 14 have the same number of teeth.
• the distance a between the axes of rotation R01 and R04 and R32 and R04 between the first cylinder 01; 32 and knife cylinder 04 (shown in dashed lines) for the two versions of the same. The same applies to the position and / or execution of a drive connection, not shown, between the first cylinder 01; 32 and knife cylinder 04.
• the frame 29 has at least one end face of the first cylinder 01; 32 has a recess, which enables lateral removal and / or fitting of the first cylinder 01; 32 allows.
• This recess can then be dimensioned, for example, in such a way that the cylinder 01, 32 is passed through and, in operation, is closed by a bearing which receives the journal and, if appropriate, a ring surrounding it.
• the scope of the first cylinder 01; 32 corresponds essentially to an integer multiple of the length L of the product sections to be processed 08 both for the design as a puncture cylinder 32 and for the design as a gripper cylinder 01. That is, in the design as a gripper cylinder 01 there are no gaps between the the gripper cylinder 01 received product sections 08 (or no advance over the strand).
• the grippers 02 assigned to a specific product section 08 are arranged in the direction of rotation of the gripper cylinder 01 in front of the associated abutment strip 26, that is, the grippers 02 pass the cutting gap 09 shortly before the abutment strip 26.
• first and a second folder 28 each with at least one first cylinder 01; 32, a second cylinder 14 designed as a folding jaw cylinder 14 and a knife cylinder 04 by means of which product sections 08 of a certain length L can be cut from a strand 07.
• the first cylinder 01; 32 and the second cylinder 14 are mounted in a common frame 29.
• the first folder 28 is now designed with a first cylinder 32 designed as a pin cylinder 32 and the second folder 28 with a first cylinder 01 designed as a gripper cylinder 01.
• Both folders 28 are designed for processing product sections 08 of the same length, but the bearing arrangement for the first and second cylinders 01; 32; 14 in the frame 29 and / or a drive geometry for at least the first and second cylinders 01; 32; 14 and / or a relative position between the first cylinder 01; 32 and second cylinder 14 in the two folders 28 is or are the same.
• the folder 28 shown in FIG. 7 it is designed as a double folder 28, ie it has two cylinder groups, each with first cylinders 01; 32 and respectively assigned jaw cylinders 14 and knife cylinders 04. These two groups can be acted upon simultaneously with partial strands after division of strand 07.
• the design of the double folder 28 is, as stated above for the simple folder 28 with respect to its frame, the position of the cylinders, the drive train and / or the drive motor 31, such that for both groups an optional loading with one as a pin cylinder 32 or as a gripper cylinder 01 executed first cylinder 01; 32 can be done.
• the folder 28 - single or double - therefore does not have to be constructed in two versions, only the first cylinder 01; 32 and possibly only management facilities such.
• B. tape guides and / or Product guides are changed.
• this has, at least in one cylinder group, a further cylinder 34, by means of which the product can be provided with a second transverse fold.

Landscapes

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

Applications Claiming Priority (2)

Publications (2)

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• 2004
  • 2004-01-16 DE DE102004002348A patent/DE102004002348A1/de not_active Withdrawn
• 2005
  • 2005-01-12 US US10/586,126 patent/US7442158B2/en not_active Expired - Fee Related
  • 2005-01-12 DE DE502005000939T patent/DE502005000939D1/de active Active
  • 2005-01-12 WO PCT/EP2005/050108 patent/WO2005068335A1/fr active IP Right Grant
  • 2005-01-12 EP EP05701496A patent/EP1706343B1/fr not_active Not-in-force
  • 2005-01-12 AT AT05701496T patent/ATE365697T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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