EP1264792B1 - Device and method for dividing a stack of sheets into reams of a predetermined number of sheets - Google Patents

Device and method for dividing a stack of sheets into reams of a predetermined number of sheets Download PDF

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Publication number
EP1264792B1
EP1264792B1 EP20010710027 EP01710027A EP1264792B1 EP 1264792 B1 EP1264792 B1 EP 1264792B1 EP 20010710027 EP20010710027 EP 20010710027 EP 01710027 A EP01710027 A EP 01710027A EP 1264792 B1 EP1264792 B1 EP 1264792B1
Authority
EP
European Patent Office
Prior art keywords
stack
ream
blade
gripper
sheets
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.)
Not-in-force
Application number
EP20010710027
Other languages
German (de)
French (fr)
Other versions
EP1264792A1 (en
Inventor
Fausto Pizzi
Nicola Corregiari
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.)
Bielomatik Leuze GmbH and Co KG
Original Assignee
Bielomatik Leuze GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bielomatik Leuze GmbH and Co KG filed Critical Bielomatik Leuze GmbH and Co KG
Priority to EP20010710027 priority Critical patent/EP1264792B1/en
Publication of EP1264792A1 publication Critical patent/EP1264792A1/en
Application granted granted Critical
Publication of EP1264792B1 publication Critical patent/EP1264792B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00Separating articles from piles
    • B65H3/32Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile
    • B65H3/322Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder of the pile for separating a part of the pile, i.e. several articles at once
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H83/00Combinations of piling and depiling operations, e.g. performed simultaneously, of interest apart from the single operation of piling or depiling as such
    • B65H83/02Combinations of piling and depiling operations, e.g. performed simultaneously, of interest apart from the single operation of piling or depiling as such performed on the same pile or stack
    • B65H83/025Combinations of piling and depiling operations, e.g. performed simultaneously, of interest apart from the single operation of piling or depiling as such performed on the same pile or stack onto and from the same side of the pile or stack
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/42Piling, depiling, handling piles
    • B65H2301/422Handling piles, sets or stacks of articles
    • B65H2301/4223Pressing piles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/42Piling, depiling, handling piles
    • B65H2301/422Handling piles, sets or stacks of articles
    • B65H2301/4224Gripping piles, sets or stacks of articles
    • B65H2301/42242Gripping piles, sets or stacks of articles by acting on the outermost articles of the pile for clamping the pile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00Parts for holding the handled material
    • B65H2405/50Gripping means
    • B65H2405/52Gripping means reciprocating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimension; Position; Number; Identification; Occurence
    • B65H2511/30Number
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00Problem to be solved or advantage achieved
    • B65H2601/50Diminishing, minimizing or reducing
    • B65H2601/51Diminishing, minimizing or reducing entities relating to handled material
    • B65H2601/511Waste of handled material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/10Handled articles or webs
    • B65H2701/18Form of handled article or web
    • B65H2701/182Piled package
    • B65H2701/1826Arrangement of sheets

Description

  • The invention relates to an apparatus and method for subdividing a stack of sheets into giants of predetermined number of sheets. In paper processing, stacking and palletizing of these cut sheets often occurs after the production of cut sheets. In the further processing of these single sheets then individual giant must be generated, containing the most possible number of sheets a predetermined number of sheets. Typical giant sizes are, for example, in the range of 50 to 500 leaves.
  • Different methods are known for determining the number of leaves in a single ream. On the one hand, if the number of sheets of the individual giant is known from the outset, individual, beyond the stack edge projecting marker strips when stacking the leaves einschießen in the appropriate places. On the other hand, this is on the one hand consuming, since this a corresponding device must be present when stacking, on the other hand, it is not always known when stacking the leaves, which number of sheets should be included in the individual to be taken down from the pile giant.
  • It is known that paper of certain quality (usually in terms of weight per square meter of paper) has a uniform thickness. Paper stacks of the same quality differ in height from each other only if there are air gaps between individual sheets. Therefore, it is known for stacking of stacks of paper to compress the paper on one side with a certain surface pressure, which is reliably the same stack height with the same number of sheets and paper quality. To discard a Rieses predetermined number of sheets is then inserted in the predetermined number of sheets corresponding height of the upper edge of the paper stack in the paper stack and thus separated the Ries lying predetermined number of sheets from the remaining remaining stack.
  • However, this method has the disadvantage that it is necessary for the correct determination of the height of the paper stack on the one hand to bring a high surface pressure in the paper stack at the puncture, on the other hand with the increasing surface pressure but the risk of piercing at least one of the leaves in the puncture area to damage. Here, not only damages due to buckling of the paper count when a sheet is hit at the puncture site instead of the space between two sheets, but also when the surface of one of the sheets, for example by wiping or scratch marks, is impaired in their quality.
  • DE-A-26 39 676 describes a device for feeding a Rundstapelbogenanlegers, in which a partial stack is separated from a total stack, that a rotatable roller is pressed obliquely from below against a stack edge and thus separates the overlying stacking part. Thereafter, a gripper seizes the separated part of the stack and transports it.
  • DE-A-38 35 032 describes a method and an apparatus for unstacking blanks stacked in blocks on pallets. Each block consists of an already finished number of blanks lying on a base. In this respect, this method is similar to the previously described with marker strips. A gripper has as pliers lower part a plate which moves above the base, and as a pliers upper part a holding punch and another, from the removal side forth remote plunger.
  • Furthermore, from EP-B-0 743 919 a method and an apparatus for dividing a pile of sheets into giant become known, in which a stop on the gripper facing upper edge of a stack rests under the weight of a balance parallelogram. There is a knife that cuts into the stack so loaded and creates space for an L-shaped profile that belongs to a removal system.
  • The object of the invention is to provide a device for dividing a stack of sheets in single giant given size, by means of both an accurate determination of the number of sheets and a largely damage-free unstacking can be made.
  • The object of the invention is achieved by a device or by the method according to the independent claims.
  • In a device according to the invention a stack of sheets is divided into single giant predetermined number of sheets, including a gripper is provided. The gripper has a first pressure pad for generating a predeterminable surface pressure in the stack to be split. He also has a sword for piercing the stack to be split at a predetermined height from the top of the stack. In addition, a gripping tongs for handling the segregated ream is provided. The gripper consists on the one hand of a fork as a lower, insertable into the stack part and on the other hand from a pliers shell for clamped holding the ream between the fork and pliers shell. According to the invention, in addition to the first Anpresskissen acting on the piercing side of the stack of sheets, also a second Anpresskissen provided. The second Anpresskissen used to generate a pressure in the pile aufzuteilenden on the attack side, so the piercing, side facing away from the stack.
  • According to an advantageous embodiment of the invention, the sword is the Anschnäbeln, so the piercing with less - for example, in the range of less than 3mm lying - penetration depth of the sword tip in the stack.
  • On the gripper, a pull bar is provided, wherein the pull bar designed vertically movable and beyond is designed so that it at the latest with the gripper facing side of the stack of sheets comes into contact when the paper stack is geschnäbelt the sword. Moreover, it is advantageous if the pull bar has a friction surface on its side facing the stack, the front side. The Friction surface can be formed in particular in the form of a rubber coating or a rubberized layer. In this case, the pull bar is used by a vertically upward moving away movement when the pull bar is in lateral contact with the paper stack to pull the ream secreted by the sword upwards. In particular, when the sword has only angeschnäbelt the paper stack, the pull bar of the discharge of the weight of the paper of the sword of the overlying ream serves. Before that, of course, the corresponding pressure pad must be moved away from the paper stack - upwards. At the same time it is necessary for this purpose that on the side facing away from the paper stack of the piercing side of the paper stack, the back, a second Anpresskissen ensures that the unilaterally raised leaves from the stack can not slip backwards. In particular, the pulling up of the ream to be discarded by the pull bar makes it possible to insert the sword over the entire length into the paper stack almost without load. The sword can then serve to reliably push up the ream and serve the distance between the rejected ream and the now remaining upper edge of the rest of the pile. By raising the sword in particular a sufficient gap for the insertion of a fork of a gripping tongs is created.
  • According to an advantageous embodiment of the invention, the fork is used to segregate and gripping the ridge lying above the sword. According to a further embodiment, the sword is arranged vertically movable relative to the fork for this purpose. Embodiments are preferred in which both the piercing or biting of the paper stack by the sword, as well as the insertion of the sword in the paper stack and the retraction of the fork in the space created by the sword in a horizontal movement takes place at right angles to the gripper facing side of the Stack is aligned. Here are preferred embodiments according to which the sword and fork are independently movable horizontally.
  • According to embodiments of the invention, the sword consists of a forward projecting, the stack facing flat blade. In contrast, the fork is preferably designed so that projecting tines are provided on the stack. There are preferably provided at least two prongs, a larger number of prongs is also possible. Particular preference is given to configurations according to which at least one tine is arranged on each side of the sword.
  • By means of a device according to the invention, a paper stack can be divided into single giant by a method according to the invention. In detail, a method according to the invention comprises the method steps according to the independent claim.
  • In the stack of sheets, a defined pressure is generated by means of a first pressure pad on the front upper side of the stack, which faces the gripper. By means of a second Anpresskissens is also on the rear upper side of the stack, which faces away from the gripper, a defined pressure in the stack produced. Thereafter, the gripper is moved to its working position with respect to the stack. It is located in close proximity to the front of the stack facing it. At a distance from the top of the stack is the sword of the gripper. The distance is determined so that it corresponds to the stack height of the predetermined number of sheets of the sheet type contained in the stack at the pressure generated by the first Anpresskissen. The sword then performs a horizontal feed motion at this distance from the top of the stack. The length of the vertical feed motion is determined so that the Sword stabs the stack, ie that the sword penetrates only slightly into the stack. After this first slight prick of the paper stack at the point where the stack is divided into the remainder stack and the ream to be discarded, the first pressure pad is lifted off the stack. On the front side of the stack, there is no more pressure in the stack, which goes beyond the burden of the own weight of the leaves of the rejected Rieses. Only after this relief, the sword is completely inserted into the stack. Subsequently, by a vertical lifting movement of the sword, the rejected ream of predetermined number of sheets lying above the sword is raised. In the resulting space between the upper edge of the remaining remainder of the stack and the auszusondernden ream above the sword gap between the fork of the gripping tongs of the gripper is introduced. After insertion of the fork in the gap, the gripping pliers is closed by the pliers upper part is lowered so far that the auszusondernde Ries is clamped between the fork and pliers upper part of the gripping pliers. Only at this time, the second, rear Anpresskissen is moved away from the stack and then moved away held in the tongs, herauszusondernde ream from the stack.
  • According to an advantageous embodiment of the invention, a Ziehleiste is brought into contact with the gripper facing the front of the paper stack after the beaking of the paper stack by the sword. The pull bar is to be regarded as part of the gripper. The pull bar is then on the side of the paper stack, with a defined contact force can be specified. The contact force is chosen so that damage to the leaves does not occur by pressing in at the contact point. After the pull bar comes into abutment with the paper stack and after the first Anpresskissen is released from the stack, the pull bar is moved vertically upwards. there the leaves of the ream to be discarded are slightly raised on one side above the sword in the piercing region. This measure is used for further weight relief before the complete insertion of the sword in the paper stack at the specified location. It is sufficient if at least the majority of the leaves above the sword is raised. A certain residual part of the ream to be discarded can continue to rest on the sword with its weight. For this reason, it is advantageous if the pull bar is moved so that it only comes into contact with the stack above the sword.
  • In a method according to the invention, it is also advantageous if, after retracting the fork in the resulting space between the auszusondernden ream and the remaining remainder of the sword is lowered by vertical method in a position in which the upper edge of the sword below the tines of the fork, in particular below the top of the tines of the fork, lies. It is particularly advantageous if the sword is lowered vertically to the extent that it rests on the remaining stack with defined contact force. The fact that the sword rests with undefined bearing force on the remaining remainder stack, however, this residual stack is backed up that the top leaves are moved in the process of auszusondernden ream and thus the uniform edge formation of the stack and the vertical stacking one another rectilinear alignment of the leaves to each other in the remaining stack get lost. For this reason, it is also advantageous if the sword remains in abutment with the remaining stack until the scrap to be discarded is removed from the stack. In the method according to the invention, it is particularly advantageous if the reaming-out ream is moved away from the stack to the rear, as seen from the attack side of the gripper. It is also particularly advantageous in the inventive method when the stack is provided by sheets on a lifting device. The lifting device is preferably designed so that after each removal of a ream, a lifting of the paper stack takes place, wherein the lifting takes place just to the extent that corresponds to the height of the rejected Rieses. This ensures that the top edge of the paper stack is at the same height before the beginning of each throwing out a ream from the paper stack. Alternatively or in addition to the alignment of the upper edge of the paper stack by means of a lifting device and the gripper (40) may be formed so that it is adapted to compensate for the decreasing height of the paper stack in the course of successively separating giants from the stack. This can be done in particular by appropriate traversing devices.
  • These and other features are set forth in the description and drawings, as well as the claims, the individual features of which may be incorporated by themselves or in the form of subcombinations in an embodiment of the invention and in other fields, and which may constitute advantageous embodiments thereof. Embodiments of the invention are illustrated in the drawings and will be explained in more detail below. It shows:
  • Fig. 1 to 6
    a first device according to the invention for separating a ream from a stack of sheets during different phases of the process sequence;
    Fig. 7 to 17
    a device in different situations of the procedure in the treatment of a Restrieses;
    Fig. 18 to 25
    a device in different stages of the course of a second method for the treatment of residual giants.
  • The treatment of residual giants shown in FIGS. 7 to 25 and described by reference thereto is not part of the present invention and will be described for a complete understanding of the process.
  • Figs. 1 to 6 show an apparatus according to the invention for dividing a stack of sheets into a ream having a predetermined number of sheets and a remainder stack. In each case a side view and a plan view of the device according to the invention are shown in FIGS. 1 to 6. Figs. 7 to 17 also show a Device according to the invention, but has been supplemented with respect to the device according to FIGS. 1 to 6 to corresponding device components, which are required for a first embodiment for the treatment of residual giants. In Figs. 18 to 25, a modification showing a second embodiment for treating the residual giant in different phases is set forth. FIGS. 7 to 25 only show either the side view or the top view in each case. However, the device consists essentially of the same components as the device according to FIGS. 1 to 6.
  • Hereinafter, a device according to FIGS. 1 to 6 will first be described. Subsequently, with reference to FIGS. 1 to 6, the process flow of a method for rejecting a ream from a stack of sheets according to the invention will be explained. Thereafter, the respective method for treating a residual giant will be explained with reference to FIGS. 7 to 17 and 18 to 25. In this context, then the representational changes and additions to the device according to FIGS. 1 to 6 are set forth. The embodiments shown in FIGS. 7 to 25 are each only preferred examples of correspondingly suitable devices. In particular, other devices may also be suitable for carrying out the process according to the invention for treating residual giants.
  • FIGS. 1 to 6 show a device according to the invention for separating out a ream of predeterminable number of sheets from a stack of sheets. The device consists of a multiple-part gripper 30. The gripper 30 is actually more of a gripping device and has many partially independently movable in at least one traversing subunits. The common base of the subunits of the gripper 30 forms the carrier 31, to which all subunits of the gripper 30 are attached and opposite to this these are partially movable in at least one direction.
  • At a given location 80, the stack 83 of sheets is provided. The gripper 30 is formed from a carrier 31, protrude from the various parts. First, the first Anpreßkissen 32 is provided that is arranged vertically movable with the top of the stack of sheets on the front attack side of the gripper 30 for this purpose. The second Anpreßkissen 33 is provided in the region of the opposite, rear end of the stack 83. This is also held at least vertically movable on the support 31, so that regardless of the position of the upper edge of the stack 83 of sheets, the Anpreßkissen can be brought into contact with the top of the leaves.
  • In the illustrated embodiment, a conveyor belt is arranged on the rear, the attack side of the gripper 30 side facing away, which serves to receive the rejected giant.
  • The gripper 30, with its paper stack in a Ream predetermined specifiable number of sheets dividing attack and gripping means engages the facing him, front side of the stack 83 of leaves.
  • For this purpose, first of all the sword 35 is provided which punctures the predetermined height into the stack of leaves by the number of leaves which a ream is to contain. In Fig. 1 it is shown how the sword 35 is located with its corresponding actuator in a position immediately in front of the front edge of the stack 83. Shortly before the front edge of the stack 83 and in the vertical slightly above the sword 35, the pull bar 39 extends upward. The pull bar 39 has a friction surface 38, which faces the stack 83. The friction surface 38 can be both a serrated profile have, as well as be made by correspondingly soft material, such as rubber, so as to allow a strong rubbing conditioning of the pull bar on the front edge of the stack 83 above the sword 35. Also, the pull bar 39 is vertically movable relative to the stack 83.
  • Independently horizontally movable relative to the sword 35, the gripping tongs 40 are arranged on the carrier 31. The gripper 40 consists of two relatively vertically movable parts. On the one hand, the fork 41, which can retract into a gap between the auszusondernden ream 90 and the remaining remainder stack 92 and the pliers shell 42. In this case, the fork 41 two prongs 43, one prong 43 can on each side of the sword 35 in the Stack to be retracted.
  • In addition, a hold-down 45 is also formed. The hold-down 45 is likewise arranged on the carrier 31 and can be retracted by a horizontal feed movement with its two contact surfaces 46 into the intermediate space between the ream 90 to be discarded and the remaining remainder stack 92. The contact surfaces 46 engage in each case between the sword and a prong 43 of the fork 41 in the intermediate space, as can be seen from the lower, drawn as a top half of the picture.
  • In Fig. 1, the situation is shown as it is given at the beginning of a screening process. The first and second nip pads 32 and 33 are brought downwardly in vertical abutment with the top edge 84 of the stack 83. About the means of the Anpresskissen 32 and 33 introduced surface pressure is achieved that the stack height of a number of sheets is always at least approximately equal and only from the Paper quality, that is essentially the sheet thickness of a single sheet is dependent. The sword 35 is located with its sword tip immediately in front of the facing front of the stack 83. The sword is at such a vertical distance from the top edge 84 of the stack that in height above the sword is the appropriate number of leaves, which forms a ream to be discarded. In the immediate vicinity of the front of the stack 83 is also the pull bar 39 with its stack facing friction surface 38. In this case, the lower edge of the pull bar 39 is slightly above the sword 35. In a corresponding vertical position, but horizontally further away from the front of the stack is the hold-down 45 with its contact surfaces 46 and the fork 41 of the grasping forceps 40 with the tines 43 in engagement level ready.
  • To discard a ream 90 with the predetermined number of leaves, the sword 35 stings the stack 83. For this purpose, the sword with its sword tip penetrates only slightly, i. usually only a few millimeters, preferably for example, about 2 to 3mm in the stack. This situation is shown in FIG. 2. In addition, compared to Fig. 1 has only changed that now also the pull bar 39 is located with its friction surface 38 in contact with the front edge of the ridge 90. By puncturing the stack 83 with the sword, the stack 83 is split into the scrap 90 to be discarded and a remaining stack 92 remaining.
  • Now, first the first Anpresskissen 32 is moved away vertically upwards. Thereby, the pressure generated by the first Anpresskissen 32 at the front of the stack is released. Furthermore, the pull bar 39 located in abutment with the front of the stack is moved vertically upwards. By frictionally given at the pull bar attachment at least one Part of the leaves of the ream 90, these are raised at the front of the stack by the movement of the pull bar 39 and are no longer in contact with the remaining remaining part of the ream and the remainder of stack 92. This is true only for the front of the leaves, as at the rear side of the stack continues to produce the surface pressure. For this purpose, the second Anpresskissen 33 is still in proper contact with the stack 83, consisting of the remaining stack 92 and the auszusondernden ream 90. At the same time is prevented by the leaves of the ream 90 by the one-sided lifting against each other and thereby move the alignment of the Leaves on top of each other, as originally given in the stack, is dissolved. After by vertical driving away of the first Anpresskissens 32 and by lifting, for example, at least the majority of the ream 90 on the insertion side of the sword 35, a most extensive weight relief was made in the puncture area, the sword can now completely pierce the stack. To facilitate a damage-free puncturing, it may be provided that air outlet nozzles 37 are provided on the sword, in particular at the tip of the blade of the sword, is blown through the air between the bottom sheet of auszusondernden ream and the top sheet of the remaining rest stack 92. In this way, a slight air cushion can be generated, so that the sword 35 can penetrate into the stack 83 with almost no friction and thus further defines the separation between the ream 90 to be discarded and the remaining stack 92 remaining. Following this, the ream 90 is separated from the remaining stack 92 by horizontal movement of the sword upwards at the insertion side and a gap 86 is created. The situation reached after these processes is shown in FIG.
  • In order to arrive at the situation illustrated in FIG. 4, in the further course of the method, the grasping forceps 40 are initially moved horizontally into the engagement position on the stack 83. In the attack position, the fork 41 with its prongs 43 penetrates into the intermediate space 86 between the residual stack 92 and the ream 90 to be discarded. The pliers upper part 42 is located in a position above the upper edge of the ream 90. In addition, the hold-down 45 is retracted with its contact surfaces in the intermediate space 86.
  • In order to arrive at the situation illustrated in FIG. 4 in the further process sequence in FIG. 5, the hold-down device is first lowered by a vertical method so that it rests on the upper edge of the remaining rest stack 92 with a predeterminable contact force. Thereafter, the sword 35 is first moved by vertical lowering so far that the leaves of the ream 90 rest on the fork 41 of the grasping forceps 40. Subsequently, the sword 35 is pulled by horizontal process from the stack. It is now in a horizontal position in front of the front edge of the stack 83. After the vertical lowering of the sword 35 below the level of the upper edge of the prongs 43 of the fork 41 of the grasping forceps 40 is the auszusondernde Ries 90 at the front alone and completely on the Fork 41 up. In this case, the fork 41 is located immediately above the upper edge of the remaining stack 92 and the lower edge of the ridge 90 is only slightly removed from the upper edge of the remaining stack 92. The second pressure pad 33 is still resting on the stack 83, which is formed from the remaining stack 92 and the ream 90. In order to keep the ream 90 auszusondernde in the grasping forceps 40, the forceps upper part 42 is lowered so far by a vertical feed movement until it rests with defined contact force on the top of the ridge 90. Now the austerminating Ries 90 in the Gripping tongs 40 of the gripper 30 held. After this is the case, the second Anpresskissen 33 is driven vertically upwards. Now the rear end of the stack 83 is relieved. The situation illustrated in FIG. 5 has been reached.
  • The remaining stack 92 is fixed by the hold-down 45 in its position, while 40 passes through a horizontal method of gripping tongs the auszusondernde ream back from the stack on the conveyor belt 85. This situation is shown in FIG. 6.
  • After the ream 90 has been completely transferred to the departing conveyor belt 85, the grasping forceps 40 opens and these can now be moved back to their starting position shown in FIG. 1 backwards. Also, the hold-down 45 can now be lifted from the front end of now the stack 83 forming residual stack 92 and then back to the position shown in FIG. 1 - in the picture to the right, so seen in the stacking direction forward - are moved away. The initial position shown in FIG. 1 is then achieved again by bringing the first and second pressure pads 32 and 33 into contact with the upper edge of the stack 83. In this way, the exact position of the upper edge with respect to the stationary carrier 31 can be determined. Furthermore, the sword 35, the hold-down 45 and the grasping forceps 40 must be aligned vertically with respect to the upper edge of the stack 83. The detection of the position of the upper edge can be carried out so that the position of the first Anpreßkissens 32 is detected and the other parts of the gripper are aligned vertically with respect to this position. In order that the position of the upper edge of the stack 83 remains constant, it may be provided that the place of delivery 80 of the stack 83 is on a lifting table. By lifting the lift table to the extent of the height of a ream to be eliminated ensuring that the vertical position of the top of the stack remains constant.
  • FIGS. 7 to 17 show various snapshots from a process for treating residual giants 91, particularly in connection with an apparatus and a method for splitting a stack of sheets into giants of predetermined number of sheets as shown in FIGS. 1 to 6 Can be used. In this case, the implementation of a method according to FIGS. 7 to 17 with the procedure described below is not necessarily a method as has been described with reference to FIGS. 1 to 6, or a Entstaplervorrichtung, as shown in Figs to 6 has been bound. However, in the example set forth below, it is assumed that a de-stacking device according to FIGS. 1 to 6 is present.
  • The situation shown in FIG. 7 corresponds approximately to the situation, as shown in FIG. 5. One essential difference is that the ream held in gripping tongs 40 is a residue 91. A residue 91 differs from the other giants to be discarded in that it no longer contains the desired, predetermined number of leaves to contain a ream 90 to be discarded. Furthermore, the situation of FIG. 7 differs from FIG. 5 in that the sword 35 has been inserted below the last sheet of the stack 83, which at the beginning of the puncturing process consisted only of the remaining ream. Otherwise, the process of grasping the residual giant 92 need not be different from grasping another ream 90.
  • According to the situation of the method for treating residual giants shown in FIG. 7, the residue has been grasped as well as a complete ream by means of the gripping tongs and is therefore manipulated. By moving the grasping forceps 40 backwards away from the original attack side of the grasper 30 on the stack 83 of leaves, the residue ridge 92 is pushed onto the conveyor belt 85. At the beginning of the conversion process of the Restrieses 92 on the conveyor belt 85, the conveyor belt moves at its conveying speed - this corresponds to the feed speed of the gripping tongs 40 - on. It takes up the Restries 92 at least partially. This situation is shown in FIG. 8. If this position of the gripping tongs 40 shown in FIG. 8 is reached, the conveyor belt 85 is stopped. The Restries 92 is still held by the grasping forceps 40, but is largely predominantly on the stationary conveyor belt 85. The Restries 92 is no longer in contact with the pallet 79, on which the stack 83 was originally stacked and was brought to the place of delivery. The pallet 79 stands on a not shown in the drawing lift table. By moving the lift table down, the pallet 79 is taken away. Below the hold-down 45 and the sword 35 now creates the free space to provide a new stack 93 at the point of deployment 80. This situation is shown in FIG. 9.
    In order to achieve the situation illustrated in FIG. 10, the new stack 93 has been brought to the delivery site 80 on a new pallet 79. The lift table, which is not shown explicitly in the drawing, is then moved again so that the upper edge of the new stack 93 lies at least approximately in the plane of the conveyor belt 85. In this situation, the hold-down 45 comes with its contact surfaces 46 in abutment with the top sheet of the new stack 93. The system is such that a certain surface pressure in the stack on the side of the blank holder is generated and therefore the leaves of the stack 93 against horizontal Move are kept secured.
  • The sword 35 is in a position outside of the new stack 93. Now restrained in the gripping tongs 40 Restries 91 is stacked on the new stack 93. This Aufstapelvorgang is partially completed in the snapshot shown in Fig. 11. The gripper 40 is moved horizontally forward in the direction of the new stack 93. For this purpose, in order to support the Umstapelvorgangs and to avoid damage to the paper on the surface, a simultaneous process of the conveyor belt 85 in the appropriate direction. In this case, as is the case when unstacking a ream, the movement of the conveyor belt 85 preferably takes place synchronously with the method of the gripping tongs 40 so that there is no relative movement of the surface of the conveyor belt 85 to the bottommost sheet of the ream 90 or residual ridge 91 to be discarded.
  • As shown in Fig. 12 is located after completion of the movement of the grasping forceps 40 Restries 91 on top of the new stack 93 resting, with a possible alignment of the leaves of the rest giant 92 is given to the leaves of the new stack 92. However, the Restries 91 is still held in the grasping forceps 40 at the front of the stack or the Restrieses 91.
    Now, the sword 35 is retracted into the gap 86 between the Restries 91 and the new stack 93. As far as air outlet nozzles are present in the sword 35, now air can be blown into the gap.
  • Now the gripper 40 is opened. This is done in particular by the fact that the fork 41 of the gripper 40 is moved vertically downwards and thus the upper fork edge passes below the level of the sword 35. Subsequently, the gripper 40 is in a Move position outside the range of the new stack 93. The Restries is now on the one hand on the new stack 93 and on the other hand slightly on the sword 35 on. The bearing force is optionally reduced by the injected air at the outlet nozzles of the sword blown air. The sword is moved away to the front, ie his sword leading edge passes outside the engagement area with the new stack 93 and the Restries 91. Now so is the Restries, which can distinguish it from the rest of the new stack 93 in FIGS. 12 and 13 hatched is completely on the new stack 93 provided at the point of delivery 80.
  • In order to move from this position shown in FIG. 13 to the position shown in FIG. 14, a method for gripping a ream to be discarded proceeds, as has been described, for example, in connection with FIGS. 1 to 5. In the position shown in FIG. 14, corresponding to FIG. 5, a ream 90 to be discarded, which consists of a residue 91 and leaves of the new stack 93, is grasped by the grasping forceps 40. This is illustrated graphically by the fact that the ream 90 to be discarded consists of two subareas, to a region 91 shown hatched and, on the other hand, a region not shown hatched, which consists of leaves of the new stack 93. In the position shown in FIG. 14, the ream to be discarded is gripped by the grasping forceps and ready to be driven away from the stack. About the lift table, the new stack 93 has been raised so far that the lower edge of the reaming auszusondernden is approximately equal to the conveyor belt 85. Although the hold-down 45 has been retracted into the intermediate space 86 between the ream to be discarded and the remaining remainder stack 92, it is not yet located on the surface of the remainder stack 92. As already described in relation to the sequence of the Riesaussondernungsverfahrens according to FIGS. 1 to 6, is the blank holder 45 is brought into abutment with the upper edge of the remaining stack 92 so that the sheets are held immovable in the vertical direction. Thereafter, the reaming auszusondernde is pushed away by pushing the gripping tongs 40 backwards in the direction of the conveyor belt 85 from the remaining stack 92. FIG. 15 shows a situation in which the scrap 90 to be discarded partially rests on the conveyor belt 85.
  • In the further course of the method, one arrives at the situation illustrated in FIG. 16. The situation shown in FIG. 16 as a side view is shown in FIG. 17 as a plan view. The Ries to be discarded was placed on the conveyor belt 85. The now open grasping forceps 40 is moved back toward its starting position to the front end of the stack 83 back. This movement takes place by a method along the carrier 31.
  • The leading edge of the ream 90 comes into abutment with the stop bar 60, which was retracted into the travel path of the ream 90. In this case, this stop bar 60 may be part of a further gripping device 62, which grips the ream 90 and further manipulated. Once the - seen now in the transport direction of the ream 90 - front edge of the ream is in abutment with the stop bar 60, the transport conveyor movement of the conveyor belt 85 is interrupted. By means of corresponding bodies driven bumpers 61, which can attack both on the two transverse sides of the ream 90 and with a bumper strip, which seen on the transport direction of the ream rear end, which formerly formed the front end of the front side of the stack 83, the Ries 90 is pushed flush. Flushing by means of the bumpers 61 compensates the alignment of the leaves of the residual giant 91 with the leaves of the new stack 93 within the now formed ridge 90.
  • In the vertical direction, a cleanly aligned trained Ries 90 is ensured. This ream 90 can now, for example, as shown in FIGS. 16 and 17, be gripped by means of a gripping device 62 and then further conveyed. The alignment of a ream 90 is only required if this ream consists of two sub-giants, which originally come from different stacks of paper. Incidentally, according to the process flow as set forth with reference to Figs. 1 to 6, it is ensured that the alignment of the sheets with each other as originally provided in the stack 83 is maintained throughout the transfer and unstacking.
  • 18 to 25 show an alternative embodiment of a method for the treatment of residual giants 91. The situation of FIG. 18 corresponds to the situation according to FIG. 7. It is in the embodiment according to FIG. 18 as a difference from the embodiment according to FIG Fig. 7 only given no conveyor belt 85. The tasks of the conveyor belt, in particular the interim holding the Restrieses 91 is taken over by a gripping device 62, as will be explained below.
  • In order to achieve the situation shown in FIG. 19 in process sequence, the Restries 91 is moved by means of grasping forceps 40 so that the first running away from the pallet 79 end of Restrieses 91 a stop bar 60, which is part of the gripping device 62 reaches. Once this stop bar 60 has been reached, the conveying movement of the Restrieses 91 is interrupted. By means of a corresponding punch 63 of a gripping device 62, the remote from the gripping jaw 40 end of Restrieses 91 is also held as clamping, as the other end in the gripper 40 clamped between the fork 41 and upper tongs 42 is clamped. This situation is shown in FIG. 19. Now, as shown in Fig. 20 and according to the procedure in Previous method initially moved away by means of the lifting table, the empty pallet 79 down. The Restries 91 holds, held at its two ends in each case by the gripping tongs 40 and by the gripping device 62, with slight deflection in its achieved position. The surface pressures in the gripping tongs and in the gripping device must be selected so that the paper does not slip out of the tongs due to its own gravity and falls away downwards. This is especially possible with light paper grades and with small paper sizes, for example paper sizes in the range of A4 or A3. The larger the area of the paper and the larger the number of sheets in a ream or the larger and heavier a sheet itself is, the more that is argued in favor of that set forth in the previous method according to FIGS. 7 to 17. Fig. 21 then shows the situation in which a new stack 93 has been provided on a new pallet 79 at the place of delivery and has been moved so far upwards by means of the lifting table that the upper edge of the new stack 93 is at the desired position, directly below the residual ridge 91 comes to rest. Fig. 21 thus corresponds to the situation as given in Fig. 10 of the previous method. According to the transition from the situation according to FIG. 11 to the situation according to FIG. 12, in the transition between FIG. 21 and FIG. 22 according to the method now described, the residue giant 91 is brought into a position above the new stack 93. For this purpose, the clamping position of the gripping tongs 40 facing away from the end of the residual giant 91 in the gripping device 62 is first released and then pulled over by the gripping device 40, the Restries on the new stack 93. It may be advantageous, by means of a blank holder 45 or the like, including the sword can count, a pressure in the new stack 93 is generated, which prevents vertical displacement of the leaves during this Umsetzbewegung. The transition from the situation illustrated in FIG. 22 to the situation illustrated in FIG. 23 corresponds to the sequences in FIG Transition between the situation in Fig. 12 and Fig. 13. The Restries 91 is first stored on the sword 35, then the fork 41 of the grasping forceps 40 is moved out and then the sword 35 pulled out. Then the Restries 91 is as flush as possible on the new stack 93.
  • FIG. 24 illustrates the situation that presents itself when a ream 90 has been separated and grasped by the new stack and the residual ridge 91 deposited thereon. This can be done, for example, according to the procedure shown in FIGS. 1 to 6, wherein in FIG. 24, the situation, as it corresponds to FIG. 5, is shown in the drawing. Again, in the ream 90, which is to be weeded out and which contains the predetermined number of leaves, the proportion of the residual giant 91 is shown by hatched representation of the residual giant. The non-hatched portion of the ream corresponds to the leaves of the new stack 93. The ream 90 was grasped by the grasping forceps 40 and is held between the fork 41 and the forceps top 42. According to the situation illustrated in FIG. 25, by moving the gripping tongs 40 over the remaining stack 92, the scrap to be discarded is pushed away from the remaining stack 92. As soon as the ream reaches the stop bar 60, the transport movement is initially interrupted and the end of the ream 90 facing away from the grasping forceps 40 in the gripping device 62 is clamped by lowering a corresponding ram. By holding on both sides clamped or by subsequent release of the clamping in the gripper 40, the ream 90 can now be moved away from the stack and processed. Thus, the gripping device 62 is an alternative manipulation unit to the conveyor belt 85, as was drawn in Figs. 1-17.

Claims (16)

  1. Device for dividing of a stack (83) of sheets into individual reams (90) of a predetermined number of sheets, with a gripper (30) having gripping jaws (40) with a jaw lower section (41) and a jaw upper section (42) and with a means for separating a ream (90) of predetermined height from the stack (83),
    characterized in that
    the gripper (30) has a first pressure pad (32) separate from the jaw upper part (42) for generating a defined pressure in the stack to be divided on the side of the gripper, and
    as a means for separation a blade (35) for insertion into the stack (83) to be divided at the predetermined height from the upper edge of the stack,
    and a second pressure pad (33) for generating a pressure in the stack (83) to be divided and applied at that side of the stack (83) opposite the application side of the gripper (30) are provided,
    where a vertically movable draw bar (39) is provided contacting the paper stack (83) above the blade (35) after insertion of the blade into the paper stack.
  2. Device according to Claim 1, characterized in that the blade (35) is used for insertion into the stack (83) while generating a predetermined pressure.
  3. Device according to Claim 1 or Claim 2, characterized in that the draw bar (39) has on its side facing the stack (83) an in particular rubber-coated friction surface (38).
  4. Device according to one of the preceding claims, characterized in that the jaw lower part (41) is a fork (41).
  5. Device according to Claim 4, characterized in that the blade (35) is arranged vertically movable relative to the fork (41).
  6. Device according to Claim 4 or Claim 5, characterized in that the blade (35) and the fork (41) are horizontally movable at right angles to that side of the stack (83) facing them.
  7. Device according to Claim 6, characterized in that the blade (35) and the fork (41) are horizontally movable independently of one another.
  8. Device according to one of the preceding claims, characterized in that the blade (35) comprises a flat edge facing forwards towards the stack (83), said blade preferably having on its interior air ducts leading to air outlets provided on the side of the blade and in particular in the area of the point of the blade, where air can be blown through the air ducts and the air outlets into the paper stack (83) in the area of the insertion point of the blade (35).
  9. Device according to one of Claims 4 to 8, characterized in that the fork (41) has at least two prongs projecting towards the stack (83), where in particular at least one prong is provided on each side of the blade (35).
  10. Device according to one of the preceding claims, characterized in that a hold-down (45) is provided, said hold-down (45) being insertable into the space between the ream (90) held in the gripping jaws (40) and the upper edge of the remaining stack (83) and by means of which a predeterminable surface pressure can be generated in the remaining stack (83) on the gripper side.
  11. Method for dividing of a stack (83) of sheets into individual reams (90) of a predetermined number of sheets, where a ream is separated from the stack (83) at one stack edge and then is held by a gripper (30) having a jaw upper section (42) and a jaw lower section (41), where said gripper is moved up to the stack and removes the ream (90) held in its gripping jaws (40) from the stack,
    characterized in that
    a defined pressure is generated in the stack (83) with a first pressure pad (32) on the side of the gripper (40),
    a defined pressure is generated in the stack (83) with a second pressure pad (33) on the side of the stack opposite the gripper (30),
    for separation of the ream (90) a blade (35) of the gripper (30) located at a distance from the upper edge of the stack corresponding to the predetermined number of sheets of a ream is inserted into the stack at a corresponding distance by a horizontal feed movement with the blade point,
    the first pressure pad (32) is lifted off the stack,
    the blade (35) is inserted completely into the stack and then lifts the ream (90) formed above the blade (35) with a predetermined number of sheets by a vertical lifting movement at the insertion side of the blade,
    the jaw lower part (41) moves into the gap formed by lifting of the ream (90) on one side, and the ream (90) is held clamped between the jaw upper part and lower part (42, 41),
    the second pressure pad (33) is moved away from the stack before the gripper (30) moves the ream held in the gripping jaws away from the stack,
    where no later than after the insertion of the blade (35) into the paper stack (83) a draw bar (39) comes into contact with the side of the paper stack (83) above the blade, where the sheets of the ream (90) to be separated are lifted at the insertion side of the blade (35) by a vertical upward movement of the draw bar (39).
  12. Method according to Claim 11, characterized in that after movement of the fork forming the jaw lower part (41) into the resultant gap the blade (35) is lowered by vertical movement to a position in which the blade upper edge is below the prongs of the fork (41).
  13. Method according to one of Claims 11 or 12, characterized in that a hold-down (45) can be inserted into the gap between the remaining residual stack (92) and the ream (90) held in the gripping jaws (40), where said hold-down can be brought with a defined contact force into contact with the top side of the residual stack (92).
  14. Method according to Claim 13, characterized in that the blade (35) and/or the hold-down rest on the remaining residual stack (92) with a defined contact force until the ream to be separated is removed from the remaining residual stack (92).
  15. Method according to one of Claims 11 to 14, characterized in that the ream (90) to be separated is moved away rearwards from the stack (83) when seen from the application side of the gripper (30).
  16. Method according to one of Claims 11 to 15, characterized in that the stack (83) is provided by sheets on a lifting device, where after each removal of a separated ream (90) the height of the upper edge of the provided stack (83) is adjusted such that the upper edge of the stack (83) is at a predetermined height.
EP20010710027 2001-06-08 2001-06-08 Device and method for dividing a stack of sheets into reams of a predetermined number of sheets Not-in-force EP1264792B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20010710027 EP1264792B1 (en) 2001-06-08 2001-06-08 Device and method for dividing a stack of sheets into reams of a predetermined number of sheets

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
ES01710027T ES2269336T3 (en) 2001-06-08 2001-06-08 Device and procedure for the subdivision of a leaf battery in resams of a number of default leaves.
DE2001515596 DE50115596D1 (en) 2001-06-08 2001-06-08 Device and method for gentle and waste-free further processing of a residual giant
DE2001510700 DE50110700D1 (en) 2001-06-08 2001-06-08 Apparatus and method for subdividing a stack of sheets into giants of predetermined number of sheets
ES04020937T ES2349734T3 (en) 2001-06-08 2001-06-08 Procedure and device to decompose a battery in resmas.
EP04020937A EP1484270B1 (en) 2001-06-08 2001-06-08 Device and method for gentle and wasteless further treatment of a remaining ream
EP20010710027 EP1264792B1 (en) 2001-06-08 2001-06-08 Device and method for dividing a stack of sheets into reams of a predetermined number of sheets

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP04020937A Division EP1484270B1 (en) 2001-06-08 2001-06-08 Device and method for gentle and wasteless further treatment of a remaining ream

Publications (2)

Publication Number Publication Date
EP1264792A1 EP1264792A1 (en) 2002-12-11
EP1264792B1 true EP1264792B1 (en) 2006-08-09

Family

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Application Number Title Priority Date Filing Date
EP20010710027 Not-in-force EP1264792B1 (en) 2001-06-08 2001-06-08 Device and method for dividing a stack of sheets into reams of a predetermined number of sheets
EP04020937A Not-in-force EP1484270B1 (en) 2001-06-08 2001-06-08 Device and method for gentle and wasteless further treatment of a remaining ream

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04020937A Not-in-force EP1484270B1 (en) 2001-06-08 2001-06-08 Device and method for gentle and wasteless further treatment of a remaining ream

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EP (2) EP1264792B1 (en)
DE (2) DE50110700D1 (en)
ES (2) ES2349734T3 (en)

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Also Published As

Publication number Publication date
DE50110700D1 (en) 2006-09-21
EP1484270A3 (en) 2005-01-05
EP1264792A1 (en) 2002-12-11
EP1484270B1 (en) 2010-08-11
DE50115596D1 (en) 2010-09-23
ES2349734T3 (en) 2011-01-11
EP1484270A2 (en) 2004-12-08
ES2269336T3 (en) 2007-04-01

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