EP0612679B1 - Dispositif de distribution de feuilles semi-rigides, notamment de carton, à partir d'un empilement - Google Patents

Dispositif de distribution de feuilles semi-rigides, notamment de carton, à partir d'un empilement Download PDF

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Publication number
EP0612679B1
EP0612679B1 EP94490004A EP94490004A EP0612679B1 EP 0612679 B1 EP0612679 B1 EP 0612679B1 EP 94490004 A EP94490004 A EP 94490004A EP 94490004 A EP94490004 A EP 94490004A EP 0612679 B1 EP0612679 B1 EP 0612679B1
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EP
European Patent Office
Prior art keywords
sheet
stop
cylinder
cylinders
stack
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
EP94490004A
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German (de)
English (en)
French (fr)
Other versions
EP0612679A1 (fr
Inventor
Jean Pierre Cuir
Gérard Cuir
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Individual
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Individual
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Publication of EP0612679A1 publication Critical patent/EP0612679A1/fr
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Publication of EP0612679B1 publication Critical patent/EP0612679B1/fr
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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
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/063—Rollers or like rotary separators separating from the bottom of 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
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means

Definitions

  • the present invention relates to the distribution one by one of semi-rigid sheets, in particular of cardboard and particularly of corrugated cardboard, from a stack of sheets substantially of the same format. It relates more precisely to a device allowing such a distribution and which comprises rotary feed members capable of driving, by friction, the sheet with which they are in contact below or above a stop, which locks in position all other sheets in the stack.
  • dispensers are well known in the cardboard industry and more precisely corrugated cardboard, sometimes under the term feeders. They are intended to precisely feed a sheet to introduce it synchronously into a receiving machine such as a printer, a cutter ...
  • the front edge of the stack is supported on one (or more) vertical stop, called margin stop, which is adjustable in height.
  • margin stop which is adjustable in height.
  • the free space between the lower edge of the stopper and the part of the feeder, opposite this lower edge, on which the stack rests be slightly more than the thickness of one sheet and less than the thickness of two sheets.
  • the free space in question will be delimited by the upper edge of the stop.
  • the feeder comprises extractor rollers, located behind the margin stop, and capable of ensuring the total extraction of the sheet and its introduction into the following machine. It also includes vertical pushers which are arranged between the sets of rollers and which lift the stack as soon as the sheet is driven by the extractor rollers. These vertical pushers prevent the rollers from entraining the sheet which follows, in the stack, the sheet to be dispensed.
  • the presence of the extractor rollers is made necessary due to the frictional forces brought into play between the sheet to be dispensed and the fixed parts, on which said sheet is supported during its movement, whether the supply surface, being immediately under the lower edge of the stop, either the pushers or the surfaces on which the rear parts of the stack rest.
  • the machine has also been simplified by eliminating the vertical pushers.
  • the device comprising at least two sets of rotary transfer members, each set is driven by an independent motor with variable speed, and the device comprises a control system which is adjusted so as to start and accelerate the motors and therefore the rotary transport members at a predetermined speed for advancing of the sheet to be dispensed and to decelerate or stop each motor and the corresponding transport member after the sheet has moved and before the next sheet has come into contact with a rotary transport member.
  • this object is perfectly achieved by the device of the invention. It is a device for dispensing one to one of the semi-rigid sheets, in particular of cardboard and more particularly of corrugated cardboard, below or above a stop, behind which said sheets are stacked.
  • this device comprises rotary supply members, mounted in a suction chamber, and capable of driving by friction, below or above the stop, the sheet with which they are in contact, said members supply being controlled in rotation by motor means.
  • the device being free of sheet extraction system in front of the stop and of fixed surface in contact with the stack near said stop, the rotary feed members consist of at least three cylinders, l the axis of the outlet cylinder being vertical to the stop; in addition, the device comprises means for synchronizing the cylinders so that, during the distribution of a sheet given, on the one hand each of the cylinders upstream of the output cylinder is decelerated after said sheet has left contact with it and on the other hand the output cylinder is decelerated after the rear edge of said sheet has exceeded the vertical of the stop, the upstream cylinders already being in the stopped position, and therefore after the next sheet has come into contact with it.
  • the device of the invention comprises rotary support members, free to rotate, arranged so that they support the rear part of the stack while the supply cylinders support the front part.
  • rotary support members free to rotate, arranged so that they support the rear part of the stack while the supply cylinders support the front part.
  • These will in particular be rollers mounted on at least one shaft, parallel to the axis of rotation of the supply cylinders.
  • the sheet being dispensed is therefore not supported on any fixed part of the machine.
  • This particular provision aims to reduce as much as possible the frictional forces capable of slowing the movement of a sheet during the distribution thereof.
  • the front stop is a continuous plate.
  • the device of the invention comprises two shafts, roller supports, the ends of which are mounted on longitudinal arms, as well as a rear wedging stop, which moves on the end of said arms; in addition, a drive system makes it possible to move the rear stopper and correspondingly the two roller support shafts as a function of the length of the stacked sheets.
  • the dispenser 1 of the invention is intended to supply sheets 2 of corrugated cardboard, for example to a cutting or printing station. There is shown in Figure 1 an element of this station 3, ensuring the movement of the sheet distributed inside said station.
  • the sheets 2 of corrugated cardboard are arranged in the form of a stack 4, substantially regular, which rests in its front part on three supply cylinders 5, 6 and 7 and in its rear part in two sets rollers 8 and 9 respectively;
  • the stack 4 is approximately locked in position thanks to a front stop 10 which is a continuous plate, a rear stop 11 and two side plates 12 and 13 also forming stops.
  • a front stop 10 which is a continuous plate
  • a rear stop 11 and two side plates 12 and 13 also forming stops.
  • the front 10 and rear 11 stops and the two side plates 12 and 13 define a receptacle for the stack 4.
  • the three supply cylinders 5, 6 and 7 are rotated in a synchronized manner as will be explained below, while the rollers 8 and 9 are mounted free in rotation on shafts 14,15.
  • a suction chamber 19 is provided under the three supply cylinders 5, 6 and 7.
  • the front 20 and rear 21 transverse uprights of this chamber 19 come, in their upper part, in the immediate vicinity of the exterior surface of the outlet cylinder 5 for the front upright and of the third cylinder 7 for the rear upright 21.
  • the suction 19 includes a pipe 22 for connection to known means for placing under vacuum.
  • each cylinder 5, 6, 7 must have a high coefficient of friction to carry out the friction drive of a sheet of corrugated cardboard.
  • This surface with a high coefficient of friction can optionally be obtained using a sleeve 23 which is directly fitted onto the body of the cylinder 5, 6, 7. In this way it is possible to replace the sleeve 23 in the event of wear of it.
  • the rotational drive of the three supply cylinders 5, 6, 7 is synchronized in order to comply with the following two conditions.
  • first condition during the distribution of a given sheet 2 a , which is the last sheet of the stack 4, each of the three cylinders 7, 6, 5 is braked, one after the other, only after said sheet 2 has left the corresponding cylinder.
  • second condition the two cylinders 6, 7, located upstream of the output cylinder 5, must be stopped when the sheet 2 has left the output cylinder 5.
  • the expression “leaves the cylinder” covers different realities depending on whether it is the cylinders 7, 6 upstream of the outlet cylinder or the outlet cylinder itself.
  • the cylinders 7, 6 upstream of the outlet cylinder 5 (FIG. 4)
  • the sheet 2 has left the corresponding cylinder 7 or 6, when the rear edge 2 c of said sheet 2 a has no longer effective contact with the surface of said cylinder, for example 7 and that the next sheet 2 ' a comes into contact with the surface of said cylinder 7, tangentially to the latter according to the generatrix 27.
  • the cylinder 7 has already rotated by an angle ⁇ which is such that Cos.
  • ⁇ is equal at in which e is the thickness of the sheet 2 a at its rear edge 2 c and R is the radius of the cylinder 7.
  • the sheet 2 ' a comes into contact with the generator 27 only when the rear edge 2 c of the sheet 2 a has moved a sufficient distance so that said edge 2 c has shifted in height by its thickness e under the effect of the suction.
  • the outlet cylinder 5 it is considered that the distributed sheet 2 has left the outlet cylinder 5 as soon as it passes under the stop 10, beyond the plane 17.
  • the operation of the dispenser 1 according to the invention is as follows.
  • the sheets of corrugated cardboard were placed according to the stack 4 inside the receptacle formed by the front stops 10 and rear 11 and the side plates 12 and 13.
  • the first sheet to be dispensed 2 a is therefore supported, rear to front, only on the two sets of rollers 9, 8 then on the three feed rollers 7, 6 and 5 respectively, without any contact with fixed surfaces of the machine.
  • the vacuum means are started continuously, which has the effect of pressing the sheet 2 a on the surface of the three cylinders 5, 6, 7. This is to all the more important that most sheets of corrugated cardboard can present deformations of the bending type and that it is therefore necessary to ensure the flattening of said cardboard so that the front edge 2 b of the sheet 2 a is presented so straight at the free space 24 located between the front stop 10 and the outlet cylinder 5.
  • the distribution of the sheet 2 a is carried out by rotating, simultaneously, the three feed rollers 5, 6, 7, in synchronism with the operating cycle of the downstream station 3, until it reaches a desired speed for the introduction of the sheet 2 is in this position.
  • the supply cylinders 5, 6, 7 are then driven at a constant speed.
  • the suction necessary to press the sheets on the drive rollers in order to obtain sufficient friction forces to prevent the sliding of said sheets on said rolls corresponds to depressions of the order of 5000 Pa
  • the distance existing between the rear edge 2 c of the sheet 2 a and the point of tangency 27 of the next sheet 2 ' a is of the order of 17.4 mm. If we take into account a rate of 10,000 sheets per hour and a format for each sheet of 1 meter, the speed of movement of a sheet will be at least of the order of 3 meters / second. Under these conditions the time that the rear edge will take 2 c traveling the aforementioned distance of 17.4 mm will be 5.8 thousandths of a second, that is to say a time much greater than that which is necessary for the sheet 2 ′ a to come to be pressed against the cylinder 7.
  • next sheet 2 ′ a comes gradually into contact with the two cylinders, first 7 then 6, located upstream of the output cylinder, while the sheet to be fed 2 a is still in the free space 24 , the rotation of these two upstream cylinders, 6, 7 causes a slight displacement of said next sheet 2 ' a .
  • This slight movement sets the next sheet 2 ′ a along the inner face 18 of the stop 10. This setting makes it possible to correct any deviations that may occur during the approximate constitution of the stack 4. Because the front edge 2 ′ b of the next sheet 2 ′ a bears over its entire length against the stop 10, there is no risk of deterioration of said front edge 2 ′ b .
  • the position of the front edge 2 ' b of the sheet 2' a is not affected by the fact that the outlet cylinder 5 is still in rotation when said edge 2 ' b is pressed against the surface of said output cylinder 5.
  • the distribution of the sheet 2 a was achieved without having to implement an external extraction system, compensating for the frictional forces of the sheet 2 has on fixed parts, or cylinders in the process of deceleration as is the case for already known machines.
  • the conveyor system at the next station 3 can thus be a system without suction or pinch roller, but simply a system allowing the sheet 2 a to be conveyed in synchronization with the output cylinder 5.
  • the dispenser 1 is provided to adapt to the different sheet formats 2, both in length and in width.
  • the two shafts 14 and 15 as well as the rear stop 11 move on two longitudinal arms which are mounted on the distributor frame.
  • a drive system moves the rear stop 11 and correlatively drives the shafts 14 and 15. This system is adjusted so that the displacement travel of the shaft 14 is approximately 2/3 of that of the shaft 15 and the stop 11.
  • the two side plates 12, 13 are equipped with means 25 for transverse movement relative to the external upright 26 of the dispenser.
  • two extensible or sliding members 28 are provided, presenting themselves as bellows or plates, which cover in a sealed manner, for each of them, the zone extending on the one hand between the side plate 12 and the external upright 26 and on the other hand between the stop 10 and the rear upright 21 of the suction chamber 19.
  • This particular arrangement makes it possible to obtain suction, between the three supply cylinders, only in the space situated between the two side plates 12 and 13, that is to say only where the stack 4 is located.
  • the present invention is not limited to the embodiment which has just been described by way of non-exhaustive example.
  • the particular synchronization between the supply cylinders is obtained by any suitable means, whether it be purely mechanical means as is customary in the field of sheet-by-sheet cardboard printing, or even by equipping each of the cylinders.
  • for supplying an independent motor in particular an electronic servo motor of the brushless type, controlled by an electronic circuit which is connected to the motors for driving the supply cylinders and possibly to the system for driving the sheet in the station next.
  • clutch-brakes would be mounted on said pinions. The deceleration and stopping sequence would be obtained by actuating the clutch-brakes successively and then the engine.
  • the embodiment which has just been described relates to a dispenser with driving the sheets from below the stack.
  • the invention also applies to destackers in which the removal of the sheets is carried out from above the stack, the latter being held against the feed rollers by an elevating system. In this case, the sheet to be dispensed passes over the stop behind which the sheets are stacked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Crushing And Pulverization Processes (AREA)
EP94490004A 1993-02-23 1994-02-08 Dispositif de distribution de feuilles semi-rigides, notamment de carton, à partir d'un empilement Expired - Lifetime EP0612679B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9302299 1993-02-23
FR9302299A FR2701938B1 (fr) 1993-02-23 1993-02-23 Dispositif de distribution de feuilles semi-rigides, notamment de carton, à partir d'un empilement.

Publications (2)

Publication Number Publication Date
EP0612679A1 EP0612679A1 (fr) 1994-08-31
EP0612679B1 true EP0612679B1 (fr) 1995-04-19

Family

ID=9444508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94490004A Expired - Lifetime EP0612679B1 (fr) 1993-02-23 1994-02-08 Dispositif de distribution de feuilles semi-rigides, notamment de carton, à partir d'un empilement

Country Status (6)

Country Link
US (1) US5451042A (zh)
EP (1) EP0612679B1 (zh)
CN (1) CN1077863C (zh)
DE (1) DE69400001T2 (zh)
ES (1) ES2073953T3 (zh)
FR (1) FR2701938B1 (zh)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2738807B1 (fr) * 1995-09-18 1997-12-05 Rapidex Sm Dispositif d'alimentation de feuilles dans une ligne de traitement de feuilles
US5927705A (en) * 1997-05-07 1999-07-27 Lexmark International, Inc. Envelope feeder
US6059705A (en) * 1997-10-17 2000-05-09 United Container Machinery, Inc. Method and apparatus for registering processing heads
DE60038900D1 (de) 1999-12-20 2008-06-26 Exxonmobil Chem Patents Inc Verfahren zur herstellung von polyolefinen mittels verträgter ionischer katalysatoren
SE515516C2 (sv) * 2000-08-03 2001-08-20 Emba Machinery Ab Förfarande och anordning för att mata ett ark i sänder från en arkstapel
US6805341B2 (en) * 2002-11-22 2004-10-19 Kabushiki Kaisha Toshiba Sheet feeding device and image forming apparatus
SE0401099L (sv) * 2004-04-29 2005-05-24 Emba Machinery Ab Förfarande och anordning för att mata ett ark från en arkstapel
KR100548962B1 (ko) * 2005-02-05 2006-02-02 주식회사 에스에프에이 편광판 공급장치
DE102005023618B3 (de) * 2005-05-21 2006-12-07 Aci-Ecotec Gmbh & Co.Kg Einrichtung zum Vereinzeln von Silizium-Wafern von einem Stapel
CN102198742B (zh) * 2011-05-09 2012-11-28 无锡裕泰包装机械科技有限公司 瓦楞机真空吸附的真空量调节结构
CN103693489A (zh) * 2013-12-03 2014-04-02 安徽嘉隆印刷有限公司 一种瓦楞纸下料台
JP6417927B2 (ja) * 2014-12-24 2018-11-07 沖電気工業株式会社 媒体処理装置
CN105966680A (zh) * 2016-06-27 2016-09-28 应金宝 一种包装纸片的供送装置及其供送方法
CN106423937B (zh) * 2016-11-28 2019-12-27 东台世恒机械科技有限公司 一种加纸方便的模切机输纸机构
JP7012670B2 (ja) * 2017-09-27 2022-01-28 三菱重工機械システム株式会社 製函機及び段ボールシートの加工位置調整方法
CN109850253B (zh) * 2018-12-25 2020-12-01 四川汇利实业有限公司 一种间歇式药品包装箱纸板输送机构
CN109879084A (zh) * 2019-03-25 2019-06-14 深圳市君兴精机纸箱机械有限公司 吸风伺服送纸机
CN110127404B (zh) * 2019-05-05 2020-06-02 安庆市润宇纸塑包装有限责任公司 一种印刷机纸张进给系统
CN110342290A (zh) * 2019-08-08 2019-10-18 深圳市君兴精机纸箱机械有限公司 吸风伺服免压送纸机
CN111674096B (zh) * 2020-07-21 2022-04-19 福建兴方舟科技有限公司 一种瓦楞盒加工用分纸压线机

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US4896872A (en) * 1980-04-28 1990-01-30 Wm. C. Staley Machinery Corporation Intermittently protruding feeder for paperboard blanks
KR890000910B1 (ko) * 1984-06-29 1989-04-13 가부시기가이샤 히다찌세이사꾸쇼 지엽류의 분리 반송장치
DE3572957D1 (en) * 1984-11-23 1989-10-19 Prime Technology Inc Improvements in or relating to apparatus and methods for feeding articles such as sheets or boards
US4928950A (en) * 1984-11-23 1990-05-29 Sardella Louis M Rotary type feeder machines and methods
US4705265A (en) * 1985-03-11 1987-11-10 Konishiroku Photo Industry Co., Ltd. Automatic sheet feeding apparatus
US4705262A (en) * 1986-10-07 1987-11-10 Roberts Ronald R Fence installation apparatus
US4982950A (en) * 1988-10-12 1991-01-08 Charles Petrosky Rotatable exercise device
US5048812A (en) * 1988-11-03 1991-09-17 Prime Technology Sheet feeding apparatus
GB8901055D0 (en) * 1989-01-18 1989-03-15 Simon Container Mach Ltd Apparatus for feeding boards or sheets from a stack
EP0414157B1 (en) * 1989-08-23 1996-03-13 Rengo Co., Ltd. Blank feeder and method for controlling the same
US5064183A (en) * 1989-10-31 1991-11-12 Brother Kogyo Kabushiki Kaisha Suction type sheet feeding device

Also Published As

Publication number Publication date
FR2701938B1 (fr) 1995-05-24
CN1077863C (zh) 2002-01-16
EP0612679A1 (fr) 1994-08-31
FR2701938A1 (fr) 1994-09-02
DE69400001T2 (de) 1995-11-16
ES2073953T3 (es) 1995-08-16
CN1098068A (zh) 1995-02-01
US5451042A (en) 1995-09-19
DE69400001D1 (de) 1995-05-24

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