US3777903A - Apparatus for forming and conveying stacks of flat articles, especially sheet articles - Google Patents

Apparatus for forming and conveying stacks of flat articles, especially sheet articles Download PDF

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Publication number
US3777903A
US3777903A US00142730A US3777903DA US3777903A US 3777903 A US3777903 A US 3777903A US 00142730 A US00142730 A US 00142730A US 3777903D A US3777903D A US 3777903DA US 3777903 A US3777903 A US 3777903A
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US
United States
Prior art keywords
stack
conveyor
articles
completed
lowering
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
US00142730A
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English (en)
Inventor
G Kuckhermann
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher 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
Priority claimed from DE19702024398 external-priority patent/DE2024398C3/de
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
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Publication of US3777903A publication Critical patent/US3777903A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H31/28—Bands, chains, or like moving receivers
    • 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
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of 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
    • B65H31/00—Pile receivers
    • B65H31/30—Arrangements for removing completed piles
    • B65H31/3054—Arrangements for removing completed piles by moving the surface supporting the lowermost article of the pile, e.g. by using belts or rollers
    • 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
    • B65H2701/19—Specific article or web
    • B65H2701/191—Bags, sachets and pouches or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/10—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns
    • Y10S414/102—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including support for group
    • Y10S414/103—Vertically shiftable
    • Y10S414/105—Shifted by article responsive means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/10—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns
    • Y10S414/115—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including article counter

Definitions

  • ABSTRACT In apparatus for forming and conveying stacks of sheet articles arriving on a supply conveyor, the apparatus comprising a stack conveyor on which the articles are successively deposited in superposed relationship aligned against a displaceable abutment whilst the stack conveyor is not feeding and by which each completed stack is fed to a discharge conveyor, the time interval between completion of one stack and commencement of formation of the next stack is minimised and the possible height of efficient stacking is increased by providing for lowering of the stack conveyor in dependence on the growth rate of a stack being formed so that the uppermost article in the stack being formed is substantially at a constant level slightly below the discharge end of the supply conveyor, the stack conveyor being raised again as a completed stack is being transported away and before a new stack is formed.
  • the invention relates to apparatus for forming and conveying stacks of flat articles, especially sheet articles such as flattened sacks or bags or flattened tubular sections of flexible material from which sacks or bags are to be made.
  • a complete production unit for making bags always consists of a plurality of .juxtaposed machines which are interconnected by conveyors and which, in
  • an abutment or alignment stop against which the articles come to lie during stacking and which is instrumental in forming properly aligned stacks must be moved out of therpath of a completed stack before the latter can be transported away. Further, the stop must be moved back again before a new stack can be formed.
  • Conventional stacking apparatuses consist of a reciprocatable stacking table or an intermittently movable conveyor belt of which the respective table surface or conveying run is disposed a predetermined distance below the discharge end of a supply conveyor for the articles to be stacked.
  • This predetermined distance must be at least equal to the highest stack that might have to be formed and of course the alignment stop must extend downwardly over the entire height of the completed stack to reach the stacking table or conveyor belt.
  • the height of the completed stacks is restricted because there is a limit to the distance below which the stacking table or conveyorbelt can be disposed beneath the level of the supply conveyor. If this distance is too large, there is a distinct danger that the articles will turn or fold over as they are being flung onto the stacking table or conveyor belt, especially if the articles are made of flexible film material.
  • the alignment stop of known stacking apparatus must be moved through long distances to move out of the path of a completed stack and then back again.
  • the time for moving the alignment stop must therefore be added to the time it takes to transport a completed stack from the stacking station and this results in a considerable total period during which the stacking apparatus must not be supplied with further articles for forming a new stack.
  • this means that the time interval between supplying the last article for a completed stack and the first article for a new stack must be at least equal to the aforementioned total period if the completed stack is to be discharged during this time interval. To achieve such a time interval, the production rate for the articles to be stacked must therefore stay below a predetermined limit.
  • the invention aims to provide a stacking and conveying apparatus in which the total period between completion of one stack and formation of a new stack is limited to, or is almost limited to, the actual time it takes to transport a completed stack away, and which also permits the formation of stacks of any desired height.
  • apparatus for forming and conveying stacks of flat articles arriving on a supply conveyor comprising a stack conveyor onto which the articles are successiveively thrown from the discharge end of the supply conveyor to stack up against an aligning stop whilst the stack conveyor is not feeding, the stop being movable out of the path of a completed stack before feeding of the stack conveyor is started to transport the stack to a discharge conveyor, wherein the stack conveyor is lowerable during stacking in dependence on the growth rate of a stack being formed such that the uppermost article of the stack being formed will be at a substantially constant level slightly below the discharge end of the supply conveyor, an intermediate conveyor is provided between said stack conveyor and discharge conveyor, the upstream end of the intermediate conveyor being lowerable in unison with the stack conveyor and the downstream end of the intermediate conveyor remaining at sustantially the same level as the discharge conveyor, and wherein the stack conveyor and intermediate conveyor are raisable after completion of a stack whilst the latter is transported away.
  • Lowering of the stack conveyor may be controlled by a senser which is adapted to scan the position of the uppermost article in the stack being formed, the senser preferably being mounted at the lower edge of the aligning stop on the upstream side thereof and being adapted to actuate a switch which is included in the electric circuit for a lowering drive for the stack conveyor and intermediate conveyor.
  • the raising and lowering drive for the stack conveyor and intermediate conveyor and a pivoting drive for moving the aligning stop upwardly out of the path of the completed stack may be operable by a counter for the articles after it has counted a predetermined numher of articles supplied by the supply conveyor so as to ensure that eachstack will contain the same number of articles.
  • a counter for the articles after it has counted a predetermined numher of articles supplied by the supply conveyor so as to ensure that eachstack will contain the same number of articles.
  • FIG. 1 is a side elevation of a stacking apparatus
  • FIG. 2 is a part-section on the line IIII in FIG. 1;
  • FIG. 3 is a circuit diagram of an electric control for operating the FIG. 1 apparatus.
  • FIGS. 4 to 6 show further details of the FIG. 3 circuit.
  • the stacking apparatus comprises a stack conveyor 1 consisting of a plurality of parallel belts, an aligning stop or abutment 2 and an intermediate conveyor 3 which also consists of a plurality of parallel belts.
  • the conveyor 1 is mounted in a frame 4 which is provided with guide bars 5, 5' slidable in sleeves 6, 6' which are interconnected by a cross-member 23 which constitutes a support for a screw and nut device 24.
  • the screw of the screw and nut device is fixed to the frame 4 and the nut 26 is in the form of a gear which is carried by the support 23 and rotatable by a pinion 28 driven by a reversible motor 27 which is also carried by the support 23.
  • the screw and nut device 24 constitutes a raising and lowering drive for raising and lowering the stack conveyor 1.
  • the downstream end of the stack conveyor 1 is hinged to a frame 7 of the intermediate conveyor 3.
  • the downstream end of the frame 7 is hinged to a block 8 which is slidable in a guide 9.
  • the guide 9 is so located that the discharge end of the conveyor 3 is disposed substantially at the same level as the upstream end of a discharge conveyor 10.
  • the individual belts of the conveyors 1 and 3 pass over coaxial rollers 40 and 37, 37.
  • the aligning stop 2 is adjustable in the direction of the arrows a so that it can be set to suit the dimensions of the articles to be stacked.
  • the stop 2 comprises a flap 12 which is pivotable about a horizontal shaft 11 and at the lower edge of which there is provided a senser 13 which faces in the upstream direction.
  • the senser 13 can actuate a switch 14 which will hereinafter be further described in relation to the circuit of FIG. 3 and which is effective to start a lowering drive for the stack conveyor 1.
  • the flap 12 is pivoted by a pneumatic drive 29 between the full line position in FIG. 1 at which it can catch the arriving articles W and the chain-dotted position in FIG. 1 at which it is swung out of the path of a completed stack of articles.
  • the drive 29 comprises a double-acting pneumatic cylinder 30 pivotally suspended between a lever 31 and a displaceable bearing 32.
  • the lever 31 is fixed to the shaft 11 which is also fixed to the flap 12.
  • the bearing 32 is adjustable in unison with the flap 12 when the latter is set to a different size of articles to be stacked and can then be clamped in position by means of a screw 33 on the frame 4.
  • the various drives for the stacking apparatus namely a drive 34 (FIG. 2) for feeding the stack conveyor 1, the raising and lowering drive constituted by the nut and screw device 24 and the drive 29 for pivoting the flap 12 of the aligning stop 2 to a position where it releases a completed stack are actuated by an impulse generator 16 which may be an electronic repetition counter of the kind marketed by the Swiss firm Elesta under the Trade Mark CP 31.
  • the setting on the impulse generator 16 determines the number of articles W to be contained in each stack St and therefore also determines the lowermost final position of the stack conveyor shown in chain-dotted lines at 1 in FIG. 1.
  • the conveyor 1 Upon commencement of a stacking operation, the conveyor 1 is in its uppermost position shown in full lines in FIG. 1, where its conveying run is located so closely below the discharge end of the supply conveyor 19 that the articles W will not turn over as they are thrown against the flap 12 located in their path.
  • the flap stops the articles so that their leading edges are aligned in the stack being formed.
  • the senser 13 is struck by the following articles and this causes the switch 14 to close.
  • the switch 14 is also shown in FIG. 3. Closing of the switch 14 energises an output relay c1 and activates the motor 27 to turn in a direction effective to lower the conveyor 1.
  • the impulse generator 16 closes a switch 16 (FIG. 3) by sending an impulse thereto, whereby a control relay d1 becomes energised and becomes self-holding through an opening contact d4.
  • the relay d1 thereupon operates a delayed control relay d2.
  • an output relay 02 becomes energised and self-holding through the opening contact d4.
  • the relay c2 operates a control valve s1 (FIG. 5) of the pneumatic cylinder 30 for pivoting the flap 12 to the releasing position.
  • the piston rod of the cylinder is thereby projected and causes the flap 12 to move to a horizontal position.
  • the time delay in operating the control relay d2 ensures that the uppermost article W of a stack to be formed will come to lie properly against the flap 12.
  • the output relay 03 is energised and operates a magnetic s2 of an electromagnetic clutch 35 so that the conveyor 1 is caused to circulate in unison with the intermediate conveyor 3.
  • the latter is continuously driventhrough a chain transmission 36 from the discharge conveyor and is passed about the rollers 37, 37 which are loosely mounted on a drive shaft 38 for the conveyor 1, the drive shaft 38 being stationary during the stacking operation.
  • a positive drive connection is made between the rotating roll 37 and the shaft 38 through a hub 39 of the clutch, the hub being fixed to the shaft 38.
  • the rolls 40 fixed thereto cause the conveyor l to commence feeding and thefinished stack St is transported away towards the intermediate conveyor 3.
  • the completed stack fed by the conveyor 1 depresses the feeler and thereby actuates an erasing relay d3 which, after the feeler has been released by the trailing edge of the stack, generates an impulse which momentarily closes a control relay d4.
  • This energises an output relay c4 and causes self-holding through the switch 15.
  • the relay 04 is a reversing relay to cause the motor 27 to turn in a direction effective to lift the conveyor 1.
  • Elevation of the two conveyors 1 and 3 is terminated by the abutment 17 which, in the uppermost position of the conveyor 1, opens the switch 15.
  • the flap 12 is returned into the path of the new stack to be formed as soon as the rear edge of the previously completed stack has released the feeler 20.
  • the relay c2 opens through the momentary opening of the opening contact d4 and thereby opens the control valve s1 so that the piston-rod side of the pneumatic cylinder 30 becomes vented and the flap 12 is pulled into the full line position of FIG. 1 by the retracting piston rod.
  • the feeding speeds of the conveyors 1, 3 and 10 is preferably equal, the intermediate conveyor 3 being driven by the discharge conveyor 10 so that the conveyors 3 and 10 can feed a completed stack even if the conveyor 1 is already stationary.
  • Apparatus for forming and conveying stacks of flat articles arriving on a supply conveyor comprising a stack conveyor adapted to successively receive said articles from the discharge end of said supply conveyor, an aligning stop cooperating with said stack conveyor and adapted to stack said articles up when said stack conveyor is not feeding, means for moving said aligning stop out of the path of a completed stack before said feeding of the stack conveyor is started to convey the stack to a discharge conveyor, means for lowering said stack conveyor during stacking in dependence on the growth rate of a stack being formed such that the uppermost article of the stack being formed is at a substantially constant level slightly below the discharge end of said supply conveyor, a moveable intermediate conveyor positioned between said stack conveyor and said discharge conveyor, means for lowering the upstream end of said intermediate conveyor in unison with said stack conveyor, means for keeping the downstream end of said intermediate conveyor at substantially the same level as said discharge conveyor, and means for raising said stack conveyor and said intermediate conveyor in unison after completion of a stack and while said stack is transported away.
  • Apparatus according to claim 1 and further comprising a senser adapted to scan the position of the uppermost article in the stack being formed and for controlling the lowering of said stack conveyor.
  • Apparatus according to claim 1 wherein said means for raising and lowering said stack conveyor and said intermediate conveyor and said means for moving said aligning stop out of the path of the completed stack comprise a counter for the articles which actistop into the path of a new stack to be formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pile Receivers (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
US00142730A 1970-05-19 1971-05-12 Apparatus for forming and conveying stacks of flat articles, especially sheet articles Expired - Lifetime US3777903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702024398 DE2024398C3 (de) 1970-05-19 Vorrichtung zum Bilden und Weiterfördern von Stapeln aus flachen Werkstücken

Publications (1)

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US3777903A true US3777903A (en) 1973-12-11

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US00142730A Expired - Lifetime US3777903A (en) 1970-05-19 1971-05-12 Apparatus for forming and conveying stacks of flat articles, especially sheet articles

Country Status (6)

Country Link
US (1) US3777903A (fr)
JP (1) JPS5320743B1 (fr)
FI (1) FI55625C (fr)
FR (1) FR2091430A5 (fr)
GB (1) GB1327882A (fr)
SE (1) SE353881B (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006831A (en) * 1974-03-06 1977-02-08 Electra Food Machinery, Inc. Automatic tortilla counter and stacker
US4034846A (en) * 1975-04-25 1977-07-12 Bunting Magnetics Company Method and apparatus for providing automatic stacking of manufactured parts
US4477218A (en) * 1982-03-08 1984-10-16 The Mead Corporation Offset stacker and method
US4799663A (en) * 1986-06-26 1989-01-24 G.B.R. Ltd. Feeding mechanism
US4993702A (en) * 1986-08-11 1991-02-19 Rockwell Graphic Systems Limited Apparatus for variably accelerating a drive member
US5000435A (en) * 1988-08-15 1991-03-19 Godlewski Edward S Adjustable interconnected delivery and discharge conveyor with feed control
US5074541A (en) * 1988-09-05 1991-12-24 Fuji Photo Film Co., Ltd. Device for distributing finished photographic paper
US5122030A (en) * 1988-09-13 1992-06-16 Heinz Schmeisser Method and apparatus for transporting can blanks and the like
US5655761A (en) * 1995-05-26 1997-08-12 Pitney Bowes Inc. Reversible sheet feeder accumulator
US5997238A (en) * 1998-10-13 1999-12-07 Sony Corporation On-line package stacking apparatus and method
US6168154B1 (en) * 1997-05-26 2001-01-02 Nisca Corporation Yamanashi-Ken Sheet handling device for continually fed sheets which are aligned and moved from first to second storage locations
US20030102201A1 (en) * 2000-10-19 2003-06-05 Shunji Morikazu Container group delivery mechanism , and equipment and method for transporting container
US20050042072A1 (en) * 2002-12-13 2005-02-24 Samuel Amdahl Transportation system for sheet delivery between sheet or sheet stack processing equipment
CN114194908A (zh) * 2021-11-26 2022-03-18 广州通泽机械有限公司 一种服装面料的裁剪叠码系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664343A5 (fr) * 1985-11-11 1988-02-29 Bobst Sa Dispositif pour former des lots separes d'objets plats a partir d'une nappe d'objets en mouvement.
CN112607375B (zh) * 2020-12-11 2022-10-11 豪德机械（上海）有限公司 一种多尺寸地板的堆垛设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2262236A (en) * 1938-10-18 1941-11-11 Hoe & Co R Printing machine
US3191927A (en) * 1963-06-20 1965-06-29 Crown Zellerbach Corp Stacking apparatus and method
US3339914A (en) * 1964-06-23 1967-09-05 Frederick W Grantham Laundry folder
US3525444A (en) * 1967-12-15 1970-08-25 Windmoeller & Hoelscher Apparatus for forming packs of flat articles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2262236A (en) * 1938-10-18 1941-11-11 Hoe & Co R Printing machine
US3191927A (en) * 1963-06-20 1965-06-29 Crown Zellerbach Corp Stacking apparatus and method
US3339914A (en) * 1964-06-23 1967-09-05 Frederick W Grantham Laundry folder
US3525444A (en) * 1967-12-15 1970-08-25 Windmoeller & Hoelscher Apparatus for forming packs of flat articles

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006831A (en) * 1974-03-06 1977-02-08 Electra Food Machinery, Inc. Automatic tortilla counter and stacker
US4034846A (en) * 1975-04-25 1977-07-12 Bunting Magnetics Company Method and apparatus for providing automatic stacking of manufactured parts
US4477218A (en) * 1982-03-08 1984-10-16 The Mead Corporation Offset stacker and method
US4799663A (en) * 1986-06-26 1989-01-24 G.B.R. Ltd. Feeding mechanism
US4993702A (en) * 1986-08-11 1991-02-19 Rockwell Graphic Systems Limited Apparatus for variably accelerating a drive member
US5000435A (en) * 1988-08-15 1991-03-19 Godlewski Edward S Adjustable interconnected delivery and discharge conveyor with feed control
US5074541A (en) * 1988-09-05 1991-12-24 Fuji Photo Film Co., Ltd. Device for distributing finished photographic paper
US5122030A (en) * 1988-09-13 1992-06-16 Heinz Schmeisser Method and apparatus for transporting can blanks and the like
US5655761A (en) * 1995-05-26 1997-08-12 Pitney Bowes Inc. Reversible sheet feeder accumulator
US6168154B1 (en) * 1997-05-26 2001-01-02 Nisca Corporation Yamanashi-Ken Sheet handling device for continually fed sheets which are aligned and moved from first to second storage locations
US5997238A (en) * 1998-10-13 1999-12-07 Sony Corporation On-line package stacking apparatus and method
US20030102201A1 (en) * 2000-10-19 2003-06-05 Shunji Morikazu Container group delivery mechanism , and equipment and method for transporting container
US6915895B2 (en) * 2000-10-19 2005-07-12 Suntory Limited Container group delivery mechanism, and equipment and method for transporting container
US20050042072A1 (en) * 2002-12-13 2005-02-24 Samuel Amdahl Transportation system for sheet delivery between sheet or sheet stack processing equipment
CN114194908A (zh) * 2021-11-26 2022-03-18 广州通泽机械有限公司 一种服装面料的裁剪叠码系统
CN114194908B (zh) * 2021-11-26 2024-04-26 广州通泽机械有限公司 一种服装面料的裁剪叠码系统

Also Published As

Publication number Publication date
FR2091430A5 (fr) 1972-01-14
GB1327882A (en) 1973-08-22
SE353881B (fr) 1973-02-19
JPS5320743B1 (fr) 1978-06-28
FI55625B (fi) 1979-05-31
DE2024398A1 (de) 1971-12-02
FI55625C (fi) 1979-09-10

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