Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H31/00—Pile receivers
  • B65H31/30—Arrangements for removing completed piles
  • B65H31/3036—Arrangements for removing completed piles by gripping the pile
  • B65H31/3045—Arrangements for removing completed piles by gripping the pile on the outermost articles of the pile for clamping the pile
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/42—Piling, depiling, handling piles
  • B65H2301/422—Handling piles, sets or stacks of articles
  • B65H2301/4224—Gripping piles, sets or stacks of articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/42—Piling, depiling, handling piles
  • B65H2301/422—Handling piles, sets or stacks of articles
  • B65H2301/4224—Gripping piles, sets or stacks of articles
  • B65H2301/42242—Gripping piles, sets or stacks of articles by acting on the outermost articles of the pile for clamping the pile
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2402/00—Constructional details of the handling apparatus
  • B65H2402/30—Supports; Subassemblies; Mountings thereof
  • B65H2402/35—Supports; Subassemblies; Mountings thereof rotating around an axis
  • B65H2402/351—Turntables
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/17—Nature of material
  • B65H2701/176—Cardboard

Definitions

• the invention relates to a device for removing a stack of area-like products from a collection point with a gripper device which has an upper and a lower gripper unit which, according to a first position in which it is located in the collection point ner rotation through 180 ° in a second position outside the collection point is movable.
• Such stacks of area-like products for example if they are folded printed products, are usually pushed on the stacking table by an ejector onto a conveyor device consisting of rollers or a conveyor belt, which conveys the stack further.
• a such treatment namely the ejection and the subsequent transport on a conveyor belt, can lead to a shift of the products in the stack in certain stacks, so that there is a risk that the stack will fall apart.
• a gripper device in a stacking device for cardboard boxes in which the stack is gripped between an upper and a lower gripper plate and pulled out of the stacking point. After gripping and pulling out, the gripper device essentially rotates about its own axis and transfers the stack of cardboard boxes to a further process step. With this device, no special measures are provided to prevent the stack from falling apart during gripping and removal.
• the object of the invention is to improve a device of the type mentioned in such a way that the resulting stacks are removed safely and without delay in accordance with the high working speed and are conveyed to a further processing station.
• a method for removing a stack of area-like products from a stacking point is specified, by means of which a secure gripping and holding of the stack is ensured during the removal process.
• a handling of the stack is specified by means of the methodology disclosed in claim 7. Due to the spatial deformation of the stack of surface-like products during the gripping process, in particular by shaping a channel, the stack is stabilized, which ensures a safe movement of the stack. If the printed products are highly slidable material, it can be advantageous to deform the stack in a wave shape.
• the gripper device with the specially designed upper and lower gripper units represents an essential inventive measure. Due to the special features of the upper gripper unit, which in the removal direction of the gripper presses a trough or several shafts into the stack, which due to the fork-shaped design of the lower one Gripper unit assumes this single or multiple trough-shaped structure over its entire stack height, the stack is excellently stabilized, so that no additional measures for fixing or keeping the individual stacked printed products necessary.
• the device and the method are explained in more detail below on the basis of the exemplary embodiments illustrated in FIGS. 1 to 4. Show it:
• FIG. 2 shows a view of the device for removal from the direction of arrow II in FIG. 1, both gripper devices being shown,
• FIG. 3 is a view of a gripper unit from the direction of arrow III in FIG. 1 immediately after gripping a stack
• FIG. 5 shows a schematic representation of a shaft stabilization by means of multiple rod arrangements
• Fig. 6 is a schematic representation of a device for driving under
• Fig. 7 is a schematic representation of a rotary table designed as a carousel with more than two gripper devices. 1 shows a device for removing 1 a stack 12 from a collection point 2 in a stacking device.
• the device has two gripper devices 3, 3 ', only the device 3 being shown in FIG. 1.
• the gripper device 3 is shown in the position in front of the collection point with a gripped stack 12 in solid lines and in the position moved into the collection point 2, as is the collection point 2 in dashed lines.
• the gripper device consists of an upper and a lower gripper unit 4 or 5, wherein in the exemplary embodiment shown the upper gripper unit 8 can be moved up and down by means of a piston-cylinder device 21, 22.
• This vertical path of the upper gripper unit 4 is controlled by a sensor 20, which can be any sensor with suitable properties that react to proximity.
• the exemplary embodiment shown is a compressed air sensor.
• the lower gripper device 5 moves on the stacking table into corresponding grooves 37, which are formed in a device 13 for driving underneath.
• the device 13 for driving under is arranged in a suitable manner on the stacking table 11.
• the gripper devices 3, 4 are arranged on a slide 7 which can be moved back and forth in a horizontal slide guide 8 of a rotary table 6. More "Details were ⁇ explaining in more detail below.
• the upper gripper unit 4 can be moved up and down on its own slide guide 10.
• the slide guide 10 is arranged in a gripper frame 9 which can be moved back and forth on the slide 7.
• the upper and lower gripper units 4 and 5 can be designed to be adjustable with respect to the gripper length a. This setting is required so that the different print products can always be optimally gripped.
• the lower gripper unit 5 as can be seen in particular from FIG. 3, consists of a rod arrangement 14 with two rods 15 and IS 'arranged in a holder 38. The length of these rods can be adjusted in the holder 38.
• the distance between the two bars 15, 15 ' is selected such that each stack of printed products between the two support lines formed by the bars sag in a concave channel-like manner.
• This sagging is supported by the upper gripper unit 4, which has a molded part 16.
• the molded part 16 is convexly bent downwards, so that the upper region of a stack 12 forms a stack channel 17.
• the molded part 16 is placed on a rod arrangement 18, which is held adjustable on the vertical slide.
• the bulge 19 of the molded part 16 can be clearly seen in the drawing plane of FIG. 3.
• the length of the molded part, which supports the formation of the trough extending in the removal direction, is approximately such that it extends into approximately half of the stack.
• the gripper units 4.5 go only so far "above or un- ter the stack that an area remains free, which is necessary for encircling the stack.
• the vertical slide guide arrangement 10 interacts with a lifting plate 23 designed as a slide.
• the slide guide arrangement 10 consists of cylindrical guide rods 21, 22, which are surrounded by corresponding spherical sleeves 21 ', 22'. These guide sleeves are attached to the lifting plate 23 in the usual way.
• the lifting plate or the carriage 23 is connected to a piston rod 24 of a piston-cylinder arrangement 25, which is held on the gripper frame.
• the gripper frame 9 is placed on a base plate 28 designed as a slide on the turntable 6.
• the movement of the carriage 7 having the base plate 28 is effected by a linear drive.
• This linear drive can be a toothed belt drive, but the entire arrangement can also be designed as a linear motor arrangement.
• a propulsion movement by means of a spindle drive or a hydraulically / pneumatically acting piston / cylinder arrangement is also possible.
• the turntable 6 has a base plate 30 on or on which the linear drive is optionally arranged with a drive motor 31.
• the base plate 30 is in turn arranged on a table support 32.
• the table support 32 is tubular and has a bearing ring arrangement 33 in the lower region which interacts via a drive 34 with a motor for the purpose of rotating the table support and thus the entire turntable 6.
• a gear transmission or a toothed belt drive or any other swivel drive can be provided as the drive.
• the lower counterpart to the bearing ring arrangement 33 is provided on a stationary frame 36 which also carries the motor for rotating the table.
• Both gripper devices 3, 3 ′ are arranged on the base plate 30, these two gripper devices working alternately. As can be seen in particular from FIG. 2, both gripper devices are arranged in parallel in opposite directions. When the gripper device 3 is thus directed towards the stacking point, the gripper device 3 ', on the other hand, faces the next treatment station.
• the molded part of the upper gripper unit consists of rods 18, 18 ', while the lower gripper unit has a rod arrangement of 3 individual stands 15, 15', 15 ".
• the rods of the upper gripper unit are arranged so that they essentially lie exactly in the interspace between the rods 15, 15 'or 15' and 15 ". This arrangement forms a uniform shaft in the product stack.
• Stabilization by means of a shaft described above is particularly favorable in the case of printed products which are highly slidable but at the same time cannot be stacked up to a large stack height.
• the rods 18, 18 'of the upper " gripper unit are not exactly centered in the space between the lower ones Rods 15, 15 'or 15', 15 "protrude. A better clamping effect can be achieved with certain products if the rods 18, 18 'are moved closer to the outer rods 15 or 15" of the lower gripper unit.
• FIG. 6 shows a schematic representation of a device for reaching under, as can be achieved when a lifting plate is used in the stacker.
• the lifting plate rotates together with the turntable of the stacking point in order to receive the stack in a staggered manner.
• grooves 40 are formed opposite one another, into which the rods 15, 15 'and, if appropriate, 15 "can move, so that they grip the stack collected on the lifting plate 40.
• FIG. 7 shows a schematic representation of a rotary table 6 designed as a carousel with three gripper devices 3, 3 'and 3 ".
• the slide guides of these gripper devices are arranged in a star shape relative to one another, the movement path of each gripper device being from a waiting position 43 in the center of the turntable 6 extends to a working position 44 on the outer circumference of the turntable.
• the gripper device 3 moves into the collection point in the opened state, ie with the upper gripper unit moved upwards.
• the gripper units are adjusted in length in such a way that they leave a winding area 27 in the middle of the stack.
• the control for the gripper device is acted upon by a limit switch 39 at the end of the slide guide 8 in such a way that the upper gripper unit 4 is moved downward.
• the upper gripper unit is still controlled by means of a corresponding signal in such a way that the molded part 16 presses into the stack.
• the stacking table 11 is lowered, so that the stack 12 now comes to rest on the rods 15, 15 'of the lower gripping unit 5.
• the stack 12 is given a channel-shaped configuration, ie the middle area is pushed in and the side area is pushed up, so that the middle area between the lower bars 15 and 15 'is arched to a greater or lesser extent depending on the type of product.
• the stack is stabilized by this trough-shaped shape and can now be removed from the collection point 2 by moving the carriage 7 back out of the collection point without the risk of falling apart.
• the turntable is rotated through the desired number of degrees via a signal transmitter 39 'at the rear end of the slide guide 8. In the present exemplary embodiment, a rotation through 180 ° is assumed.
• the first gripper device 4 After the rotation, the first gripper device 4 is located with its back to the collection point 2 and, after the rotation, according to the control program, is again moved forward with the help of the slide direction to another processing or treatment station opposite the collection point. After reaching the corresponding output a corresponding signal is triggered in accordance with the signal transmitter setting.
• the gripper unit then opens, causing the stack to be placed at the desired location.
• the collection point has filled again with a new stack 12 which is gripped by the second gripper device in the manner described and moved out of the collection point 2.
• the first gripper device moves back again, so that after the turntable 6 has been turned back, it is again in the starting position, in which it is ready to move again into the collection point.
• a sequence similar to that described above takes place.
• a gripper device for example gripper device 3 "has gripped a stack in the stacking position, it moves back to its waiting position 43.
• the rotary table is then rotated further by 120 ° and the empty adjacent gripper device is moved out of the waiting position 43 in the working position 44 is advanced.
• the gripper device 3 "moves again from its waiting position into the working position and transfers the stack to another processing station. Then it either returns to its waiting position empty, or it can feed the stack to a third station, in which another processing operation takes place.
• a carousel with more than two gripping devices can also be provided.
• the described device and the described method are not tied to or limited to the described and illustrated embodiments.
• the gripper device can be designed with respect to the lower gripper unit in such a way that, after driving into the collection point 2, it slightly raises the stack 12 and removes it from the collection point 2 without the stacking table 11 having to be lowered. In this way it is not necessary to intervene in the control process of the collection point; in such a case, the presence of the gripper device in the collection point can be integrated into the sequence of the stacking program by means of appropriate signal transmitters.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Pile Receivers (AREA)
• Specific Conveyance Elements (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=6524970

Family Applications (1)

Country Status (6)

Families Citing this family (18)

Family Cites Families (26)

• 1994
  • 1994-08-04 DE DE4427703A patent/DE4427703A1/de not_active Withdrawn
• 1995
  • 1995-02-13 DE DE19504686A patent/DE19504686A1/de not_active Ceased
  • 1995-08-03 EP EP95929078A patent/EP0773902B1/fr not_active Expired - Lifetime
  • 1995-08-03 WO PCT/EP1995/003099 patent/WO1996004194A1/fr not_active Ceased
  • 1995-08-03 AT AT95929078T patent/ATE186897T1/de not_active IP Right Cessation
  • 1995-08-03 US US08/776,820 patent/US5827039A/en not_active Expired - Fee Related
  • 1995-08-03 JP JP8506219A patent/JPH10503456A/ja active Pending
  • 1995-08-03 DE DE59507297T patent/DE59507297D1/de not_active Expired - Fee Related

Non-Patent Citations (1)

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