EP0434987B1 - Appareil de pliage avec contrôle de vitesse de courroie - Google Patents

Appareil de pliage avec contrôle de vitesse de courroie Download PDF

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Publication number
EP0434987B1
EP0434987B1 EP90122459A EP90122459A EP0434987B1 EP 0434987 B1 EP0434987 B1 EP 0434987B1 EP 90122459 A EP90122459 A EP 90122459A EP 90122459 A EP90122459 A EP 90122459A EP 0434987 B1 EP0434987 B1 EP 0434987B1
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EP
European Patent Office
Prior art keywords
belts
sheet material
folder
belt
arrangement
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.)
Expired - Lifetime
Application number
EP90122459A
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German (de)
English (en)
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EP0434987A1 (fr
Inventor
Richard Edward Breton
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.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0434987A1 publication Critical patent/EP0434987A1/fr
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    • 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
    • B65H45/22—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement
    • B65H45/221—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement incorporating folding triangles
    • B65H45/223—Details of folding triangles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable

Definitions

  • the present invention relates to a new and improved sheet material processing apparatus in which the transport speed of a plurality of tapes is coordinated to prevent the sheet material from being accidentally deformed.
  • a sheet material folder is disclosed in currently pending EP-A-0415 077, filed under the title "Folder”.
  • the subject of this patent application is a folder, which can be operated to form several folds in sheet material at a relatively high speed.
  • the folds are formed in a series of folding devices through which the sheet material moves continuously at a relatively high speed.
  • the folded sheet material is stacked on edge in a stacking device.
  • One of the folding devices comprises a tapered arrangement of belts, from which the sheet material to be folded is moved into the folder and is thereby gripped by a pair of creased belts.
  • the creasing tapes grip the opposite sides of the sheet material and move it out of the folding device.
  • the folding device has a first endless belt with an exposed side lying against the material, on which a groove or emergency of substantial depth is provided.
  • a narrow second endless band is equipped with an exposed permanent longitudinal rib.
  • Means are provided here with which the tapes share are movably mounted so that parts of the exposed band sides lie against one another in the longitudinal extent to the left of a linerar fold web, the rib of the second band penetrating into the groove or groove of the first band, with the result that the opposite sides of the material on the opposite sides of the narrow second volume can be folded together.
  • DE-A-23 30 513 shows a device for longitudinally folding sheets of paper, with which an increase in the folding speed is made possible.
  • the sheets to be folded are held in a non-displaceable manner during the folding process, as a result of which the folding line comes to lie at the desired location. This in turn has the consequence that the parts of the sheets to be folded which are produced by the folding process lie precisely on one another.
  • the speed of movement of the sheet material must be precisely coordinated by the tapered arrangement of belts and by the creasing belts so that it can be gripped by the creasing belts while it is being tied by the tapered arrangement of belts is moved. If the sheet material has been gripped by the creases, the The running speed of the upper and lower creasing belt must be precisely coordinated to prevent unintentional deformation of the sheet material. If one of the creasing belts moves faster than the other, then one side of the sheet material is pulled forward with respect to the other side.
  • the creased guide rollers are of the well known V-type.
  • a small change in the distance between the side surfaces of a creasing belt in contact with a guide roller results in a larger change in the rolling circle diameter of the guide roller. So if the distance between the side surfaces of a creasing tape decreases slightly, the creasing tape will move a longer distance inward on the axis of rotation of the guide roller with which it is in contact. Likewise, if the distance between the side surfaces of the creasing belt increases, it will move a longer distance outward away from the axis of rotation of the guide roller. Thus, any interaction in the cross-sectional dimension of the creasing tapes can effectively increase due to the interaction of the creasing tapes with the guide rollers.
  • the creasing tapes can be manufactured commercially in an extrusion process. When extruding a creasing tape it is very difficult to adhere to the small tolerances for the cross-sectional dimension of the creasing tape. Therefore, the cross-sectional dimension of the creasing tape in its original shape varies along its length. In use, the creasing tape will tend to stretch due to the stresses and centrifugal effects thereon. Of course, stretching will change the cross-sectional dimension of the creasing tape.
  • the present invention relates to a new and improved sheet material processing apparatus with controls, with which the running speed of the tapes in the apparatus is precisely regulated.
  • the sheet material processing apparatus is a folder
  • the sheet material can be moved from a first arrangement of belts along a track between a pair of deflectors.
  • a second arrangement of belts grips the sheet material as it is moved by the first belt arrangement and sets the transport of the sheet material along the deflectors.
  • Signal generators give speed signals corresponding to the running speeds of the first and second arrangement of belts.
  • a controller compares the speed signals and operates a belt drive to change the running speed of at least one belt in one of the belt arrangements in response to a change in the relationship between the speed signals.
  • the first tape arrangement includes a plurality of tapes which capture sheet material on both sides of a fold line.
  • the second ribbon assembly includes a pair of creases that are aligned with a fold line and capture the sheet material on both sides of the fold line.
  • the running speed of the belts and creasing belts is compared.
  • the running speed of the creasing belts is varied during the operation of the apparatus in order to keep them level with the belts. If the sheet material has been deformed before entering the folder, e.g. in a previous folding device, the creasing belts can be driven at slightly different speeds in order to correct the deformation.
  • the folder 20 (FIG. 1) comprises a first folder 22 in which a longitudinal fold is formed in a web 24.
  • a cutting cylinder 26 cooperates with a folding knife cylinder 28 to cut the folded web into a plurality of sheet material segments or signatures 30 (Fig. 8).
  • a folding device 32 comprises, in addition to the folding knife cylinder 28, a gripper flap or second folding jaw cylinder 34 (FIG. 1).
  • the second jaw cylinder 34 cooperates with the folder knife cylinder 28 to form a seam 36 (FIG. 8).
  • the signatures 30 can be conveyed from the folding device 32 either into a shingle stream delivery transport 40 or into a third folding device 44.
  • the signatures 30 are guided into a paddle wheel delivery 48.
  • the paddle wheel 48 lays out the double-folded signatures 30 in a stream of shingles on a conveyor belt 54.
  • the deflection 46 is set so that the signature 30 is passed into the third folding device 44.
  • the signature 30 is deflected upward from a horizontal plane and folded along the line running perpendicular to the fold 36.
  • the signature 30 is then conveyed from the third folding device 44 to a delivery or creasing roller device 58, in which it is pressed in order to finally set the folds in the signature.
  • the folded signatures are from the Creasing roller device 58 is conveyed into a stacking device 60, in which they are stacked in an up-to-edge orientation.
  • the first folding device 22 folds the web 24.
  • a fold is formed in this in a known manner.
  • the folded web 24 runs into the nip between a pair of pinch rollers or gripper rollers 68 and 70 which set the fold.
  • the folded web 24 then runs into the nip between a pair of transverse perforating rollers 72 and 74, through which perforations are formed at intervals of time across the web and perpendicular to the fold. Through these perforations, air escapes from the web and makes it more flexible for the subsequent formation of a fold 36 on the perforations.
  • the web 24 After the web 24 has left the gap between the perforating rollers 72 and 74, it runs into the gap between a pair of creasing rollers 76 and 78. Then the web runs into the gap between the cutting cylinder 26 and the folding knife cylinder 28.
  • the cutting cylinder 26 has a pair Cutting elements that cut the web 24 twice with each revolution of the cutting cylinder 26.
  • the cutting cylinder 26 cooperates with the folding knife cylinder 28 in order to cut the web in length centrally between the transverse perforations formed by the perforating rollers 72 and 74 for the formation of the signatures 30.
  • the signature formed by the interaction of the cutting cylinder 26 with the folding knife cylinder 28 has only one fold, namely the fold formed in the first folding device 22.
  • the folding knife cylinder 28 has puncturing ends which grasp the front end part of the web 24 before this of the Cutting cylinder 26 is cut.
  • Cutting bars are mounted on the folding knife cylinder 28, which cooperate with the knives on the cutting cylinder 26 to cut the web after the tip end portion thereof has been gripped by the pin needles on the folding knife cylinder.
  • the folding knife cylinder 28 interacts with a folding jaw cylinder 34 to form the second fold 36.
  • the second fold 36 is formed when a fold knife on the cylinder 28 presses the sheet material into an open flap on the fold cylinder 34.
  • the cylinder 28 is provided with five sets of puncturing needles, five cutting beams and five sets of folding knives.
  • the jaw cylinder 34 is smaller than the jaw cylinder 28 and has only four sets of jaws. Of course, the jaw cylinder 34 could be provided with any number of keys.
  • the folding knife cylinder 28 and the jaw cylinder 34 cooperate to continuously form the folds 36 where the web has been perforated by the transverse perforating cylinders 72 and 74.
  • the manner in which the folds 36 are formed by the interaction of the folding knife cylinder 28 with the folding jaw cylinder 34 transversely to the signature 30 is well known and will not be described further here in order to avoid lengthiness.
  • the signatures 30 are continuously recorded between the jaw cylinder 34 and a first belt arrangement 84, these being still controlled by the jaw cylinder 34.
  • the first band assembly 84 includes a number upper bands 86 and a number of lower bands 88. The front end part of a signature 30 is then detected between the upper and lower bands of the first band arrangement 84, while the rear part thereof is still between the upper bands 86 and the jaw cylinder 34.
  • the deflector 46 When the deflector 46 is raised, the signatures 30 are conveyed from bands 92 to the paddle wheel 48.
  • the delivery paddle wheel 48 rotates in a counterclockwise direction (as shown in FIG. 1) and deposits the signatures in a shingled stream on the conveyor belt 54.
  • the folds are formed in the signatures 30 as they are moved therein from a wide inlet part 96 to a narrow outlet or delivery part 98.
  • a creasing roller 102 (FIG. 1) interacts with the folding jaw cylinder 34 to form grooves in the signatures 30 there where the folds should arise.
  • the third folder 44 (FIG. 2) includes the upper and lower belts 86 and 88 which form the first belt assembly 84.
  • the upper bands 86 extend from the jaw cylinder 34 (Fig. 1) through the relatively wide inlet part 96 to the relatively narrow outlet part 98 (Fig. 3) of the folder 44.
  • the band assembly 84 tapers from the relatively wide inlet part 96 to the relatively narrow outlet portion 98 of folder 44.
  • some ribbons in the upper and lower portions of ribbon assembly 84 (as shown in FIG. 2) have been omitted in FIG. 3 to better highlight the components of folder 44. However, they are Ribbons in the upper portion of the ribbon assembly 84 (as shown in FIG. 2) generally mirror the ribbons 88 in the lower portion of the array-84.
  • the band assembly 84 includes a number of upper bands 86 and a number of lower bands 88 (FIG. 2).
  • the upper bands 86 cooperate with the jaw cylinder 34 in order to reliably detect the signatures 30 before they leave the jaw cylinder 34 (FIG. 1).
  • the tapes 86 and 88 have the signatures 30 firmly under control during their movement to the inlet part 96 of the folding device 44.
  • the tapes 86 and 88 also grip the signatures as they move toward the outlet portion 98 of the folder 44.
  • the upper bands 86 (FIG. 2) cooperate with the lower bands 88 to form a base area (FIG. 3).
  • Bands 86 and 88 keep the portion of signatures 30 between them flat on a horizontal plane.
  • the extent to which the flat, horizontal portions of the signatures deviate from the center axis 110 (FIG. 3) of the folder decreases 44 extend outward as the signatures move along the ribbon assembly.
  • the portion of the signatures is in contact with the tapered ribbon assembly 84 by the interaction between the upper and lower bands 86 and 88 firmly gripped and held flat on a horizontal plane.
  • the folding former 106 and 108 bend parts of the signatures 30 upward on both sides of the longitudinal axis 110 of the folding device 44 (FIG. 3).
  • the folding former 106 and 108 extend from the relatively wide inlet part 96 to the narrow outlet part 98 of the folding device 44 (FIG. 3).
  • the folding formers 106 and 108 contact an increasingly larger area of the signature and bend it to the opposite sides of a fold line corresponding to the longitudinal axis 110 of the folding device 44 smoothly upwards.
  • upper and lower creases 114 and 116 (FIG. 2) of a second belt assembly 118 contact the opposite sides of the signature 30 where the folds are to be formed, ie, along the central axis 110 of the Fold 44.
  • the creases 114 and 116 extend from the inlet portion 96 to the outlet 98 of the fold 44.
  • the upper and lower creases 114 and 116 hold the opposite sides of each signature 30 firmly before and after the signature ends has passed through the tapered array 84 of upper and lower bands 86 and 88.
  • the signatures move in a controlled manner through the folding device 44, first under the influence of the ribbons 86 and 88 of the first ribbon arrangement 84 and then under the influence of the creased ribbons 114 and 116 of the second ribbon arrangement 118.
  • the upper and lower creases 114 and 116 crease the signatures to ensure that the folds in the signature are formed at the desired locations.
  • the upper creasing tape 114 has a lengthwise, tapered nose 122 (FIG. 5) which cooperates with a lengthwise keyway 124 in the lower creasing tape 116 to provide a groove in the signature 30 at the location, where a fold is to be formed and to keep the signature from moving sideways with respect to the longitudinal axis 110 of the folder.
  • the upper belts 86 have lower runners with flat, horizontal side surfaces which correspond to the majority of the upper side surface of a signature in the third folding device 44 come into contact.
  • the lower bands 88 have upper runs with flat, horizontal side surfaces which come into contact with the lower side surface of a signature in the third folder 44 at a location opposite an upper band (Fig. 4).
  • the signature 30 is held firmly between the horizontal lower runs of the upper bands 86 and the horizontal upper runs of the lower bands 88.
  • the upper belts 86 include a pair of belts 130 and 132 which extend around an upper roller 134 (Fig. 3). Likewise, a pair of lower belts (as shown at 138 in Figure 2) extend around a lower roller 140; they are opposite and aligned with the upper bands 130 and 132.
  • a second pair of upper belts 144 and 146 extend around an upper roller 148 (FIG. 3). Although belts 144 and 146 extend past roller 134 to roller 148 (Fig. 3), the surfaces of the top of the lower runs of belts 144, 146 come into contact with and are positioned by the cylindrical outer surface of roller 134.
  • a pair of lower belts 150 (FIGS. 2 and 4) cooperate with upper belts 144 and 146 and extend around a lower roller 152.
  • a third pair of upper belts 156 and 158 extend around a roller 160 and have a horizontal lower barrel; it cooperates with a pair of lower belts 162 which extend around a lower roller 166 (Fig. 2).
  • a middle pair 170 and 172 (FIGS. 3 and 4) of upper belts extends around a roller 174 and cooperates with a pair of lower belts 176 (FIG. 2) which extends about a lower roller 178.
  • the horizontal lower runs of bands 170 and 172 are defined by the cylindrical ones Side surfaces of each of the rollers 160, 148 and 134 are positioned relative to the horizontal top runs of the bottom belts 176.
  • the horizontal top runs of the bottom pair of belts 176 are positioned by rollers 166, 152 and 140 relative to the top belts 170 and 172.
  • the upper creasing belt 114 (FIG. 2) extends past the upper rollers 148, 160 and 174. Therefore, these rollers are provided with central ring grooves 184 to receive the upper creasing belt 114 in the manner shown for roller 148 in FIG. 3.
  • the lower creasing belt 116 extends past the rollers 152, 166 and 178 (Fig. 2). Therefore, each of these rollers is also provided with a central annular groove 186 to receive the lower creasing belt 116 in the manner shown in FIG. 3.
  • the two formers 106 and 108 (Fig. 3) contact areas of the signature on both sides of the longitudinal axis 110 of the folder 44.
  • the extent of contact of the formers 106 and 108 with the sheet material increases as the degree of contact of the tapered Ribbon assembly 84 decreases with the sheet material.
  • the folding former 106 has an inner wall 190 and an outer wall 192 (FIG. 4). There is a lengthwise space 194 between the former and inner walls 190, 192, whereby part of a signature 30 moves during the operation of the folding device 44.
  • the former inner wall 190 has an upright or vertical side part 196 (FIG. 4) and an arcuate lower part 198.
  • the former outer wall 192 has an upright or vertical side part 202 and an arcuate lower part 204.
  • the upright side part 202 of the outer wall 192 extends parallel to the side part 196 of the inner wall 190.
  • the arcuate lower parts 198 and 204 of the former walls 190 and 192 have different radii of curvature.
  • the signature pass-through space 194 tapers from a relatively wide entrance between the lower side parts 198 and 204 to a relatively narrow space between the upright side parts 196 and 202.
  • the former 108 (FIG. 4) is a mirror image of the former 106 in shape.
  • the former 108 has an inner wall 208 and an outer wall 210, and a space 212 is provided therebetween, whereby part of a signature 30 moves.
  • the two formers 106 and 108 are aligned towards one another along the longitudinal axis 110 of the fold device 44 (FIG. 3), the area of a signature that extends through the spaces 194 and 212 between the formers walls increases. With the convergence of the former walls, their arcuate lower parts meet and connect or merge with the upright wall parts.
  • the upper creasing belt 114 extends from a rear guide roller 218 (FIGS. 2, 3 and 4) forward to a lower, front guide roller 220 (FIG. 2), then around an upper guide roller 222 back to the rear guide roller 218. It is Note that guide rollers 218 and 222 are shown in FIG. 3, but upper creasing belt 114 has been omitted in favor of a more complete representation of other components of folder 44.
  • the former inner walls 190 and 208 are located next to or adjoin supports 230 for the lower, front creasing belt guide roller 220. This has the consequence that the Signature parts on both sides of the fold move together as close as possible to the parts of the former 106 and 108, which are located next to the forward-facing creasing guide roller 220.
  • the lower creaser 116 extends forward from a rear guide roller 234 (FIG. 2) to an upper, front guide roller 236, then down around a lower guide roller 238 and back to the rear guide roller 234.
  • the upper and lower creasing belts 116 and 118 have horizontally extending runs which contact opposite sides of the sheet material carried by the creasing belts.
  • a horizontal run of the lower creased belt 116 extends between the guide rollers 234 and 236.
  • This horizontal run of the lower creased belt 116 interacts with the horizontal run of the upper creased belt 118, which extends between the guide rollers 218 and 220.
  • These horizontal runs of the upper and lower creases 114 and 116 engage the sheet material along the fold line so that the longitudinally extending tab 122 on the upper creased band 114 can cooperate with the lengthwise keyway 124 in the lower creased band 116 maintain a groove in the sheet material along the longitudinal axis 110 of the folder 44.
  • the sheet material is also held so that it cannot slide laterally away from the creased belts as it is moved away from the tapered belt assembly 84 to the outlet 98.
  • the folder 44 has the same construction as disclosed in EP-A-0415 077 entitled “Folder”.
  • the effective pitch circle diameter of the top creasing drive roller 222 and the effective pitch circle diameter of the bottom creasing drive roller 238 vary based on various factors.
  • the main cause of varying the effective pitch circle diameter of the creasing belt drive rollers is varying the cross-sectional area of the upper and lower creasing belts 114 and 116.
  • the creasing tapes 114 and 116 are of the known V-type.
  • the upper creasing belt 114 has two inwardly tapered side surfaces 242 and 244 (FIG. 5) which come into contact with equally tapered side surfaces of the upper creasing belt guide rollers 218, 220 and 222 (FIG. 2).
  • the bottom creaser 116 has two inwardly tapered side surfaces 246 and 248 (FIG. 5) which come into contact with the same tapered side surfaces of the guide rollers 234, 236 and 238 of the bottom creaser. (Fig. 2). Due to the manufacturing tolerances, the cross-sectional area of the upper and lower creasing tapes 114 and 116 will vary somewhat along the lengths of the tapes. In addition, the ligaments will tend to stretch and be subjected to centrifugal forces.
  • the running speed of the creasing belts 114 and 116 in the second belt arrangement 118 is coordinated with respect to one another and with the running speed of the upper and lower belts 86 and 88 in the first belt arrangement 84.
  • the first belt assembly 84 is driven by the main drive for the sheet material processing apparatus 20.
  • the speed of travel of the first belt assembly 84 will vary as the speeds of rotation of the folder cylinder 28 and folder cylinder 34 (FIG. 1) vary.
  • a belt speed signal transmitter 252 is connected to the axis of rotation of the jaw cylinder 34 and gives a signal corresponding to the running speed of the upper and lower belts 86 and 88.
  • a creased belt speed signal generator 254 (Figs. 1, 2 and 6) gives a signal corresponding to the running speed of the upper creasing belt 114.
  • a creasing belt speed signaling device 256 gives a signal corresponding to the running speed of the lower creasing belt 116.
  • the signaling devices 252, 254 and 256 are speed sensors which give outputs of electrical voltage as an indication of the running speeds of the belts 84, 114 and 116.
  • the creasing belt speed signal transmitters 254 and 256 contact straight runs of the upper and lower creasing belts 114 and 116 (FIG. 2), thereby minimizing the winding of the creasing belts around their guide rollers 260 and 262. In this way, the influences resulting from the variations in the cross-sectional area of the creasing bands 114 and 116 on the output of the speed signal transmitters 254 and 256 are reduced. Furthermore, if the creasing tapes were wrapped around the guide rollers to any greater extent, the difference in running speed of the inner side surfaces of the creasing tapes with respect to their outer side surfaces would affect the output of the speed signal transmitters.
  • a controller 266 compares the speed signals from signal generators 252, 254 and 256 (FIGS. 1 and 7). Controller 266 operates return motors 270 and 272 for the upper and lower creasing belts (FIGS. 2 and 7) to vary the running speed of the upper and lower creasing belts 114 and 116. Controller 266 activates motors 270 and 272 in response to one value change received by signal generators 252, 254 and 256 in the ratio between the speed signals.
  • Controller 266 receives a speed signal from tachometer or signal generator 252 via line 276 (FIG. 7). This signal corresponds to the running speed of the first belt arrangement 84. The controller 266 also receives a speed signal from the tachometer or signal generator 254 via a line 278. This signal corresponds to the speed of the upper creasing belt 114.
  • the controller 266 continuously compares the speed of the upper creasing belt 114 with the speed of the first belt arrangement 84.
  • the controller 266 generates an output via a line 280 to activate the drive motor 270 (FIG. 7) for the upper creasing belt.
  • a feedback signal is then sent from the drive motor 270 to the controller 266 via a line 282 to indicate that the drive motor 270 has responded to the command from the controller 266.
  • the controller 266 continuously compares the running speed of the upper creasing belt 114 with the running speed of the first belt arrangement 84 in order to maintain a predetermined ratio of the running speed between them, even if the cross-sectional area of the creasing belt 114 and the effective rolling circle diameter of the creasing belt guide rollers 218, 220 and 222 (Fig. 2) vary.
  • the controller 266 (FIG. 7) also continuously compares the running speed of the lower creasing belt 116 with the running speed of the first belt arrangement 84 in order to maintain a predetermined ratio of the running speed between them.
  • controller 266 receives a line creasing speed signal from signal generator 256 via line 286.
  • This line creasing speed signal is continuously compared to the first band speed signal from signal generator 252. If the line creasing speed 116 runs from a predetermined operating speed deviates from the first belt arrangement 84, then the controller 266 sends an output via a line 288 to activate the variable drive motor 272 for the lower creasing belt 116 in order to vary its running speed.
  • a feedback signal is sent from variable drive motor 272 to controller 266 via line 290.
  • Controller 266 Since the controller 266 continuously compares the speeds of the upper and lower creasing belts 114 and 116 with the speed of the first belt arrangement 84, the speeds of the upper and lower creasing belts are also compared with one another in an effective manner. However, the controller 266 could be constructed so that the top and bottom creasing belt speeds can be compared directly to one another and also to the speed of the first belt assembly 84 if desired. Controller 266 is commercially available from "CSR Division, Cleveland Machine Controls, Inc.® ''. Generally, the controller consists of two motion control loops, one for each creasing belt 114, 116. Each loop output controls an individual servo drive module and a motor For reasons of security and system lock, discrete inputs and outputs are used for general control functions of the folder, but other controllers can be used if desired.
  • the upper and lower creasing belts 114 and 116 are normally driven by the drive rollers 222 and 238 at the same speed.
  • the creasing tapes 114 and 116 move the opposite sides of the signature 30 at the same speed (FIG. 8), and in the meantime the fold edge 36 of the signature is leading and the majority of the signature sides are straight, as shown along the longitudinal axis 110 of the folding device 44.
  • the signature 30 is bent by the formers 106 and 108 as they are moved by the upper and lower creases 114 and 116.
  • the upper and lower creasing tapes 114 and 116 can be intentionally driven at slightly different speeds to bend the signature 30 so that undesirable deformation of the sheet material is excluded.
  • the signature 30 can be deformed downward, as shown in FIG. 9.
  • the lower creasing belt 116 is driven at a slightly higher speed than the upper creasing belt 114, the lower side of the signature is moved somewhat more with respect to the upper side, and the undesired deformation from the signature 30 is thus eliminated.
  • the upper creasing belt 114 would be driven at a slightly higher speed than the lower creasing belt 116. This would move the upper side of the signature 30 a little more with respect to the lower side thereof, thus eliminating the undesired upward deformation from the signature.
  • the aim is that the deliberate mismatch of the upper and lower creasing belt speeds remains relatively minimal. For example, the extent of the mismatching of the running speeds of the creasing belts 114 and 116 can result in one side of the Signature 30 being moved about 0.63 cm further with respect to the other side with a running distance of approximately 1.22 m.
  • the upper and lower creasing belts 114 and 116 are driven by the main drive for the folder 20.
  • This main drive is indicated schematically by the gears 296 and 298 in FIG. 7.
  • the gears 296 and 298 drive the creasing rollers 222 and 238 through harmonic excitation units 302 and 304.
  • variable drive motors 270 and 272 are held in a deactivated state by the controller 266, then the energy of the main drive is reduced by the Transfer harmonic excitation units 302 and 304 directly to the drive rollers 222 and 238. However, when the variable drive motor 270 is activated, energy is transferred from the motor to the harmonic excitation unit 302 through belt drive 306. The drive energy transmitted from the motor 270 to the harmonic excitation unit 302 converts the main drive energy input from the transmission 296 into an increase or decrease in the rotational speed of the upper creasing belt drive roller 222, depending on the direction of actuation of the variable drive motor 270.
  • harmonic excitation unit 302 The general design and operation of harmonic excitation unit 302 is the same as disclosed in U.S. -A- 3,724,368, issued April 3, 1973 under the title "Register setting device by harmonic excitation for a printing press". It should be noted that harmonic excitation unit 302 generally functions in a similar manner to a differential mechanism. Other known types of drive mechanisms could also be used to vary the rotational speed of the top creasing belt drive roller 220 by actuating the motor 270. Although other types of feedback devices can also be used, in the embodiment of the invention shown in FIG. 7, a tachometer 310 was selected for generating a feedback signal to the controller 266.
  • the drive energy for the lower creasing belt drive roller 238 is converted by the harmonic excitation unit 304 in the same manner as described above in connection with the harmonic excitation unit 302.
  • the tachometer 312 is connected to the motor 272 to generate a feedback signal to the controller 266.
  • a pair of motors 320 and 322 are directly connected to the upper and lower creasing belt drive rollers 222a and 238a.
  • the controller 266a varies the speed output of the motors 320 and 322 so as to directly vary the running speed of the upper and lower creasing belts 114a and 116a.
  • Encoders or pulse generator type feedback devices 324 and 326 are connected to controller 266a to generate a feedback signal indicative of the speed output of motors 320 and 322. If desired, signalers 254a and 256a could send a feedback signal directly to motors 320 and 322.
  • An information converter 328 is connected to the controller 266a and indicates how the speeds of the upper and lower creasing bands 114a and 116a vary.
  • the information converter 328 also enables the speed ratio between the upper and lower creasing bands 114a and 116a to be matched to one another.
  • motors 320 and 322 can be actuated so that creasing belts 114a and 116a are driven at the same or slightly different speeds.
  • the present invention relates to a new and improved sheet material processing apparatus 20 with controls (Figs. 7 and 11) for accurately regulating the speed of travel of belts 84, 114 and 116 in the apparatus.
  • the sheet material processing apparatus 20 is a folding device 44
  • the sheet material 30 can be moved by a first belt arrangement 84 along a run between a pair of deflectors 106 and 108.
  • a second belt assembly 114 and 116 detects the sheet material 30 as it is moved by the first belt assembly 84 and continues to transport the sheet material along the deflectors 106 and 108.
  • Signalers 252, 254 and 256 give speed signals corresponding to the running speeds of the first and second Belt assemblies 84, 114 and 116.
  • a controller 266 compares the speed signals and actuates a belt drive 302 or 304 to vary the running speed of at least one belt 114 or 116 in one of the belt assemblies in response to a change in the ratio of the speed signals.
  • the first belt assembly 84 includes a plurality of belts 130, 132, 138, 144, 146, 150, 156, 158, 162, 170, 172 and 176 which grip sheet material 30 on the opposite sides of a fold line.
  • the second belt assembly includes a pair of creases 114 and 116 which is aligned with a fold line and which grips sheet material 30 along the sides opposite the fold line.
  • the running speeds of the belts of assembly 84 and creased belts 114 and 116 are compared.
  • the running speeds of the creasing belts 114 and 116 are varied during the operation of the apparatus in order to keep them on to maintain the same height at the speeds of the belts of assembly 84. If the sheet material has been deformed (Figs. 9 and 10) before it enters the apparatus 20, for example by an upstream folder 32, then the creasing belts 114 and 116 can be driven at slightly different speeds to remove the deformation.

Landscapes

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

Claims (11)

  1. Dispositif de pliage (44) pour la formation d'un pli le long d'une ligne prédéterminée de pliage dans une matière en feuille (30), présentant les particularités suivantes :
    - un premier organe déflecteur (106) placé sur un côté de la ligne de pliage, orienté en longueur, à savoir de l'admission (96) à la sortie (98) dudit dispositif de pliage (44), afin de recourber dans un premier sens la matière en feuille (30) débordant d'une zone du premier côté de la ligne de pliage, pendant qu'elle se déplace de l'entrée (96) à la sortie (98) dudit dispositif de pliage (44),
    - un second organe déflecteur (108) placé sur un second côté de la ligne de pliage, orienté en longueur, à savoir de l'entrée (96) à la sortie (98) dudit dispositif de pliage (44) afin de recourber dans le premier sens la matière en feuille (30) débordant d'une zone du second côté de la ligne de pliage pendant qu'elle se déplace de l'entrée (96) à la sortie (98) dudit dispositif de pliage (44), les premier et second organes déflecteurs (106, 108) comportant des surfaces déflectrices destinées à saisir des zones devenant progressivement plus grandes de la matière en feuille (30) pendant qu'elle s'éloigne de l'entrée (96) en se dirigeant vers la sortie (98) dudit dispositif de pliage (44),
    - un premier ensemble de rubans (84) qui se trouve au moins en partie entre lesdits premier et second organes déflecteurs (106, 108) et qui est destinée à saisir et à déplacer la matière en feuille (30) le long desdits premier et second organes déflecteurs (106, 108) dans un sens l'éloignant de l'entrée (96) pour la diriger vers la sortie (98) dudit dispositif de pliage (44),
    - un second ensemble de rubans (118) qui se trouve au moins en partie entre lesdits premier et second organes déflecteurs (106, 108) et destiné à saisir la matière en feuille (30) pendant qu'elle est tenue et déplacée par le premier ensemble de rubans (84), le second ensemble de rubans (118) se prolongeant au-delà dudit premier enesemble de rubans (84) vers la sortie (98) dudit dispositif de pliage (44) de manière que ledit second ensemble de rubans (118) puisse saisir la matière en feuille (30) et la déplacer le long des premier et second organes déflecteurs (106, 108) en l'éloignant du premier ensemble de rubans (84) pour la diriger vers la sortie (98) dudit dispositif de pliage (44) après qu'elle s'est séparée du premier ensemble de rubans (84), caractérisé en ce qu'il comprend des organes de commande (34, 270, 272) destinés à faire varier la vitesse de défilement d'au moins un ruban de l'un desdits premier et second ensembles de rubans (84, 118), un premier moyen (252) de production de signaux destiné à émettre un premier signal de vitesse en correspondance avec la vitesse de défilement dudit premier ensemble de rubans (84), des seconds moyens de production de signaux (254, 256) destinés à émettre un second signal de vitesse en correspondance avec la vitesse de défilement d'au moins l'un des rubans (114 ou 116) dudit second ensemble de rubans (118) et un moyen de commande (266) destiné à comparer les premier et second signaux de vitesse et à actionner ledit moyen de commande (34, 270, 272) afin de faire varier la vitesse de défilement d'au moins l'un desdits rubans dudit premier ensemble de rubans (84, 118) en réaction à une variation du rapport entre ledit premier et ledit second signal de vitesse.
  2. Dispositif de pliage selon la revendication 1, caractérisé en ce que ledit premier ensemble de rubans (84) comprend des premiers rubans multiples (144, 156, 170, 150, 162, 176) se trouvant sur un premier côté de la ligne de pliage et des seconds rubans multiples (158, 172, 162, 176) se trouvant sur le second côté de la ligne de pliage, ledit second ensemble de rubans (118) comprenant deux rubans rainurés (114, 116) qui passent entre lesdits premier et second rubans multiples, se dirigent vers la sortie (98) dudit dispositif de pliage (44) et sont orientés sur la ligne de pliage afin de saisir la matière en feuille (30) sur les côtés opposés de la ligne de pliage.
  3. Dispositif de pliage selon la revendication 2, caractérisé en ce que la distance entre ledit premier organe déflecteur (106) orienté en longueur et ledit second organe déflecteur (108) orienté en longueur est plus grande à l'entrée (96) dudit dispositif de pliage (96) qu'à sa sortie (98), en ce que lesdits premiers rubans multiples (156, 170, 162, 176) comprennent un ruban supérieur et un ruban inférieur (144, 150) qui entrent en contact avec une zone plane de la matière en feuille (30) se trouvant sur le premier côté de la ligne de pliage, ainsi que des seconds rubans supérieur et inférieur (156, 162) qui entrent en contact avec une zone plane de la matière en feuille (30) sur le premier côté de la zone de pliage en un emplacement situé entre la ligne de pliage et les premiers rubans supérieur et inférieur, lesdits seconds rubans multiples (158, 172, 162, 176) comprenant des troisièmes rubans supérieur et inférieur (146, 150) qui entrent en contact avec une zone plane de la matière en feuille (30) qui se trouve sur le second côté de la ligne de pliage et des quatrièmes rubans supérieur et inférieur (158, 162) qui entrent en contact avec la zone plane de la matière en feuille (30) sur le second côté de la ligne de pliage en un emplacement compris entre la ligne de pliage et les troisièmes rubans supérieur et inférieur.
  4. Dispositif de pliage selon la revendication 2, caractérisé en ce qu'un premier ruban (116) faisant partie desdits deux rubans rainurés comprend un élément de surface qui est déterminé par une partie comprenant une rainure cunéiforme (124) orientée dans la direction de la longueur et se trouvant sur un premier côté de la matière en feuille (30), en ce qu'un second ruban rainuré (114) comprend un élément de surface déterminé par une partie comprenant un talon (122) orienté dans la direction de la longueur et se trouvant sur un second côté de la matière en feuille (30) et en ce que ladite rainure cunéiforme et ledit talon orientés en longueur et faisant partie des premier et second rubans rainurés (114, 116) coopèrent pour maintenir une rainure dans la matière en feuille (30) et pour empêcher la matière en feuille (30) d'effectuer un mouvement latéral par rapport à l'axe longitudinal dudit dispositif de pliage (44) pendant qu'elle se déplace vers la sortie.
  5. Dispositif de pliage selon la revendication 2, caractérisé en ce qu'au moins certains des premiers rubans multiples (144, 156, 170, 150, 162, 176) demeurent en contact avec la matière en feuille (30) de l'entrée jusqu'à un point situé à une première distance de la sortie (98) dudit dispositif de pliage (44), lesdits deux rubans rainurés (114, 116) entrent en contact avec la matière en feuille (30) en un point situé à une seconde distance de ladite sortie dudit dispositif de pliage (44) et demeurent en contact avec elle jusqu'à la sortie dudit dispositif de pliage (44) et ladite seconde distance est plus grande que ladite première distance.
  6. Dispositif de pliage selon la revendication 1, caractérisé en ce que ledit premier ensemble de rubans (84) comprend une série de rubans supérieurs et inférieurs (86, 88) qui va en se rétrécissant d'une première largeur à l'entrée (96) dudit dispositif de pliage (44) à une seconde largeur qui est plus étroite que la première et qui se trouve à une extrémité étroite de l'ensemble entre l'entrée et la sortie (96, 98) dudit dispositif de pliage (44), en ce que ladite série de rubans supérieurs et inférieurs (86, 88) comprend des éléments de surface destinés à saisir les côtés opposés de la matière en feuille (30) et à les maintenir à plat dans les zones décroissant vers l'extérieur en direction transversale sur les deux côtés de la ligne de pliage, pendant que la matière en feuille (30) se déplace dans ledit dispositif de pliage (44) et en ce que lesdites surfaces déflectrices desdits premier et second organes déflecteurs (106, 108) qui sont en contact avec des parties de la matière en feuille (30) augmentent pendant que la partie plane de la matière en feuille (30) qui est en contact avec lesdites séries de rubans supérieurs et inférieurs décroît.
  7. Dispositif de pliage selon la revendication 6, caractérisé en ce que ledit second ensemble de rubans (118) va de l'extrémité étroite de ladite série de rubans supérieurs et inférieurs vers la sortie dudit dispositif de pliage (44) et en ce que ledit second ensemble de rubans comprend des éléments de surface (122, 124) destinés à serrer les côtés opposés de la matière en feuille (30) l'un contre l'autre le long de la ligne de pliage après qu'elle s'est écarté du contact avec ladite série de rubans supérieurs et inférieurs et pendant qu'elle est recourbée par lesdits premier et second organes déflecteurs.
  8. Dispositif de pliage selon la revendication 1, caractérisé en ce que ledit second ensemble de rubans (118) comprend un premier et un second ruban (114 et 116) qui sont en contact avec les côtés opposés de la matière en feuille (30), en ce que lesdits organes de commande comprennent un premier moyen de commande de ruban (270) destiné à faire varier la vitesse de défilement dudit premier ruban (114) et un second moyen de commande de ruban (272) destiné à faire varier la vitesse de défilement dudit second ruban (116), en ce que ledit second moyen de production de signaux (254) est raccordé audit premier ruban (114) afin d'émettre un second signal de vitesse en correspondance avec la vitesse de défilement dudit premier ruban, en ce que ledit dispositif de pliage (44) comprend par ailleurs un troisième moyen de production de signaux (256) qui est raccordé audit second ruban (116) afin d'émettre un troisième signal de vitesse en correspondance avec la vitesse de défilement dudit second ruban (116), en ce que lesdits moyens de commande (266) comprennent par ailleurs un moyen de comparaison dudit troisième signal de vitesse avec au moins l'un desdits premier et second signaux de vitesse et d'actionnement dudit second moyen de commande de ruban (272) afin de faire varier la vitesse de défilement dudit second ruban (116) en réaction à une variation du rapport entre ledit troisième et lesdits premier et second signaux de vitesse.
  9. Dispositif de pliage selon la revendication 8, caractérisé en ce que lesdits moyens de commande (266) comprennent des moyens d'actionnement de l'un desdits premier et second moyens de commande de ruban (270 ou 272) afin de maintenir l'un desdits premier et second rubans à une vitesse de défilement qui est supérieure à celle de l'autre.
  10. Dispositif de pliage selon la revendication 9, caractérisé en ce que lesdits moyens de commande (266) comprennent des moyens d'actionnement de l'un desdits premier et second moyens de commande de ruban (270 ou 272) afin de maintenir l'un desdits premier et second rubans à une vitesse de défilement qui est égale à celle dudit premier ensemble de rubans (84).
  11. Dispositif de pliage selon la revendication 1, caractérisé en ce que lesdits moyens de commande (266) comprennent des moyens d'actionnement et des moyens de commande (34, 270 ou 272) afin de maintenir ledit premier ensemble de rubans (84) à la même vitesse de défilement que ledit second ensemble de rubans (118).
EP90122459A 1989-12-20 1990-11-26 Appareil de pliage avec contrôle de vitesse de courroie Expired - Lifetime EP0434987B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/453,587 US5037365A (en) 1989-12-20 1989-12-20 Folder with belt speed control
US453587 1989-12-20

Publications (2)

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EP0434987A1 EP0434987A1 (fr) 1991-07-03
EP0434987B1 true EP0434987B1 (fr) 1993-11-18

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US (1) US5037365A (fr)
EP (1) EP0434987B1 (fr)
JP (1) JP2549207B2 (fr)
CA (1) CA2029011C (fr)
DE (1) DE59003547D1 (fr)

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JP3478629B2 (ja) * 1994-01-27 2003-12-15 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 紙葉処理機械の給紙領域において紙葉を搬送する装置および電動モータの速度制御方法
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Also Published As

Publication number Publication date
CA2029011A1 (fr) 1991-06-21
US5037365A (en) 1991-08-06
DE59003547D1 (de) 1993-12-23
EP0434987A1 (fr) 1991-07-03
JP2549207B2 (ja) 1996-10-30
CA2029011C (fr) 1994-09-20
JPH04140272A (ja) 1992-05-14

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