WO1993018974A1 - Dispositif permettant de couper et retirer des bandes d'emballage d'articles emballes - Google Patents

Dispositif permettant de couper et retirer des bandes d'emballage d'articles emballes Download PDF

Info

Publication number
WO1993018974A1
WO1993018974A1 PCT/SE1993/000247 SE9300247W WO9318974A1 WO 1993018974 A1 WO1993018974 A1 WO 1993018974A1 SE 9300247 W SE9300247 W SE 9300247W WO 9318974 A1 WO9318974 A1 WO 9318974A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
article
wrapping
set forth
edge holder
Prior art date
Application number
PCT/SE1993/000247
Other languages
English (en)
Inventor
Per-Arne Grahn
Original Assignee
Conpap Ab
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 Conpap Ab filed Critical Conpap Ab
Priority to EP93908224A priority Critical patent/EP0631557A1/fr
Publication of WO1993018974A1 publication Critical patent/WO1993018974A1/fr
Priority to FI944409A priority patent/FI944409A/fi

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0025—Removing or cutting binding material, e.g. straps or bands

Definitions

  • the present invention relates to a device for cutting off wrapping strings or bands on wrapped articles, such as bales of pulp, comprising a cutting-edge holder which, from a first inoperative position located outside a bound ⁇ ary surface of a separate article, can be projected at high speed towards said article to a second position in which the cutting edge is located at least in the same plane as the boundary surface of the article while cutting off a separate wrapping string on the article.
  • SE 465,459 teaches a cutting device comprising a foot member and a toothed wheel which are arranged on a movable arm and adapted to be applied against a boundary surface of the article passing by on a conveyor.
  • the toothed wheel serves to seize a separate wrapping string and lift it onto the upper side of the foot member to remove the string some ⁇ what from the article and enable it to be cut off.
  • Cutting can be performed e.g. between a shearing means and an abutment.
  • One drawback of this cutting device is that the foot member and the toothed wheel have to be applied, and trail and rotate, respectively, against the outside of the pass ⁇ ing article.
  • bales of pulp are usually wrapped in paper which is often torn or folded. As a result, the paper often catches on the foot member, caus ⁇ ing a stoppage. Further, the bale itself may be damaged, with parts of the paper sheets projecting beyond the normal boundary surface of the bale, thereby making it impossible for the toothed wheel and the foot member to intercept the string. Should the cutting operation fail for some reason or other, e.g. because the wrapping paper has got stuck, the bale may catch in the foot member, thereby damaging the equipment.
  • SE 394,096 discloses a device for sever- ing the wrapping strings on bales of pulp with the aid of impact means.
  • Each such means is supported on the end of a pivot arm which can be pivoted towards and away from a lateral surface of the bale.
  • a plurality of impact means do, however, have to be arranged and be simultaneously swung at high speed towards the stationary bale, the impacts being evenly distributed over the whole lateral surface.
  • such a device consumes excessive amounts of energy, since but a few impact means actually cut off a wrapping string.
  • there is a considerable risk that the wrapping strings are flipped away in an uncontrolled fashion when being cut off, which makes it difficult, or even impossible, to remove the strings by an automatic device.
  • the present invention aims at obviating the above drawbacks inherent in prior-art cutting devices and providing a device which has a low energy comsumption and which averts the risks of functional trouble due to damage to the wrapping paper or to the article itself.
  • Another aim of the invention is that a failure to cut off a wrapping string should not cause the article to be caught in the cutting device. Yet another aim of the invention is to enable the string to be cut off also when the surface of the article has been damaged. A further aim of the invention is that the wrapping strings should be maintained in their positions on the bale also after cutting.
  • a device for cutting off wrapping strings which is more specifically characterised in that the cutting-edge holder is located beneath the article, more precisely between two endless conveyor elements or chains, so that the wrapping string, when cut off, will be retained in position by be ⁇ ing squeezed between the article and each of the conveyor chains, and that the device has a sensor for sensing, while the article is moving in the longitudinal direction in relation to the device, the position of a separate wrapping string and causing the cutting-edge holder to project towards the article in order to cut off the wrapping string when this crosses the path of movement of the cutting-edge holder.
  • FIG. 1 is a side view of a device for removing wrapping strings from bales of pulp
  • Fig. 2 is a top view of the device in Fig. 1;
  • Fig. 3 is an end view from the left of the device in
  • Fig. 1; Fig. 4 is a side view of a cutting device according to the invention; Fig. 5 is a top view of the cutting device in Fig. 4; and Fig. 6 is an end view of the cutting device, as seen in the direction of conveyance. Description of a Preferred Embodiment
  • a station which is arranged at a conveying path for bales of pulp and in which wrapping strings are automati ⁇ cally removed from the bales will first be described with reference to Figs 1-3.
  • a separate bale 1 is transported on a conveyor 2 in the direction indicated by the arrow 3.
  • the bales do not always have the same number of wrapping strings 4, but usually have two strings extending in two orthogonal directions.
  • An inventive cutting device, generally designated 5 is located between two endless driving elements or chains 6 of the conveyor 2, more precisely substantially beneath a plane of conveyance defined by the conveyor 2.
  • An intercepting means 7 is supported on a level above the bales by an upright frame 8, a pivotable bracket arm 9 projecting from the upper end thereof, and parallel-displacement rods 10 directed down ⁇ wards from the bracket arm.
  • the intercepting means 7 can be raised to an upper inoperative position, as illustrated by dashed lines in Fig. 1.
  • the cutting device 5 is arranged just before the intercepting means 7, so that the strings cut off are immediately intercepted and retained by the intercepting means 7.
  • the terms "before” and “in front of” are used to indicate a position in a direction against the normal direction of conveyance of the bales of pulp.
  • the terms “after” and “behind” are used to indicate a position in the direction of conveyance of the bales of pulp.
  • the separate bale 1 should first be conveyed through the station oriented in one direction, the strings 4 extending transversally of the direction of travel of the conveyor being cut off by the cutting device 5 and immediately intercepted and retained by the inter ⁇ cepting means 7.
  • the bale stops At a turning device, generally designated 12, the bale stops, is lifted and rotated through a quarter of a turn by the cylinder 13, and is lowered onto the conveyo .. The bale is then backed to the area in front of the cutting device 5 and again conveyed through the station, the other pair of wrapping strings being cut off, and removed by the intercepting means 7. All the strings have now been removed, and the bale can thus be conveyed to the next processing station.
  • the intercepting means 7 is holding four wrapping strings and is raised to its upper position.
  • the bracket arm 9 and the intercepting means 7 are swung aside, as illustrated by dashed lines in Fig. 2, and the strings are then con ⁇ veniently dropped into a container, for instance a wire coiling reel.
  • the intercepting means may instead be swung out and drop the strings after only two strings have been removed from the bale and while the bale is being conveyed to the turning device 12, turned and then backed to the area in front of the cutting device. When the bale returns to the area in front of the cutting device 5, the intercepting means 7 is then again in posi ⁇ tion to intercept and remove the two remaining strings on the bale.
  • FIGs 4.-6 illustrate the construction of the inventive cutting device 5 in more detail.
  • the cutting device includes a cutting blade 15 which, by a pneumatic cylinder 16, can be displaced between a lower inoperative position, indicated by full lines in Fig. 4, and an upper cutting position, indicated by dashed lines in Fig. 4.
  • a line 17 indicates the level of the upper plane of the conveyor 2, i.e. the plane in which the bales are moved along the conveyor.
  • the cutting edge 18 of the blade 15 is, in the first inoperative position, locat ⁇ ed at a distance beneath the plane of conveyance of the bales and, in the second projecting position, located at a distance above this plane.
  • the path of movement of the cutting blade is linear and substantially perpen- dicular to the plane of conveyance 17.
  • a sensor 19 is arranged immediately in front of the path of movement of the cutting blade.
  • the sensor 19 is an inductive sensor that responds to metallic objects in its immediate vicinity, i.e. it can sense the passage of a metallic wrapping string. When doing so, the sensor transmits a signal to an electric control circuit (not shown) which, with a certain delay, causes the pneumatic cylinder 16 to project the cutting blade 15 in order to cut off the wrapping string when this crosses the path of movement of the cutting blade.
  • the sensor 19 and the path of movement of the cutting blade are located in the space between two rotatable wheels or circular discs 20 having concentric axes of rotation.
  • the wheels 20 are arranged at one end of a U-shaped pivot arm 21 -which is pivotable about a shaft 22 acted upon by a torsional spring. This spring urges the wheels 20 towards an upper end position, as indicated by dashed lines in Fig. 4.
  • a torsional spring urges the wheels 20 towards an upper end position, as indicated by dashed lines in Fig. 4.
  • the wheels 20 will be depressed to a downwardly-pivoted position, as indicated by full lines in Fig. 4.
  • the pivotal movement of the wheels 20 and the pivot arm 21 acts on a limit switch 23, which in turn acts on the control circuit of the cutting blade so as to prevent the blade from being projected when the wheels 20 are unloaded, in spite of the fact that the sensor 19 detects the presence of a metallic object.
  • the cutting blade 15 can be caused to project.
  • the cutting blade is thus prevented from projecting unintentionally, e.g. when the device is being repaired or serviced.
  • the required loading pressure on the wheels 20 is set so high that a human being is unable to release the cutting blade and thus risk being injured.
  • the inventive cutting device is arranged essentially midway between the conveyor chains 6, indicated by dashed lines in Fig. 5.
  • the pivot arm 21 and the wheels 20 are arranged in a channel structure 24, while the cylinder 16 and the cutting blade 15 are mounted on a bracket 25 suspended from the channel structure 24.
  • An upper protec- tive hood 26 serves to protect the device and has an open ⁇ ing through which the cutting blade 15 can be projected.
  • the pneumatic cylinder is suitably of a type having a thick piston rod, so that only an insignificant amount of air has to be evacuated from the top side of the piston when the cutting blade is projected.
  • the cutting blade To make it possible to cut off the wrapping strings while the bale is at the same time continuously moved, the cutting blade must, immediately after being projected, be returned to the starting position, which is done by the control circuit switching, via an air valve, the air pressure from the underside of the cylinder piston to the top side thereof.
  • the air pressure is preferably switched before the cutting blade has reached its upper end position, so that the blade is slowed down comparatively gently.
  • the path of movement of the cutting blade 15 need not be linear and perpendicular to the plane of conveyance of the articles, and the blade need not necessarily be projected by a pneumatic cylinder.
  • the sensor 19 does not have to be arranged in front of the cutting blade 15 against the direction of conveyance, but the sensor and the blade may be arranged parallel to each other, in which case the blade can be projected without delay.
  • the invention is not restricted to the cutting of metallic wrapping strings. If another sensor is used, wrapping strings of other materials can be sensed and cut off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Basic Packing Technique (AREA)

Abstract

Un dispositif, permettant de couper et retirer des bandes d'emballage (14) d'articles emballés tels que des balles de cellulose (1), comprend un porte-lame (15) pouvant, depuis une première position de repos située à distance des surfaces délimitant un article emballé (1), décrire une trajectoire le rapprochant de cet article, dans une deuxième position où la lame de coupe est située au moins dans le même plan que l'une des surfaces délimitant l'article. Ce dispositif comprend en outre un capteur (19) destiné, pendant que l'article se déplace dans le sens longitudinal par rapport au dispositif, à détecter la position d'une bande d'emballage déterminée (4) et à faire déplacer le porte-lame (15) vers l'article pour que cette bande d'emballage soit coupée et retirée lorsqu'elle croise la trajectoire du porte-lame.
PCT/SE1993/000247 1992-03-24 1993-03-24 Dispositif permettant de couper et retirer des bandes d'emballage d'articles emballes WO1993018974A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93908224A EP0631557A1 (fr) 1992-03-24 1993-03-24 Dispositif permettant de couper et retirer des bandes d'emballage d'articles emballes
FI944409A FI944409A (fi) 1992-03-24 1994-09-23 Laite käärelankojen leikkaamiseksi pois pakattujen tuotteiden päältä

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9200912A SE9200912L (sv) 1992-03-24 1992-03-24 Anordning för avkänning och avskärning av omslagstrådar på massabalar
SE9200912-5 1992-03-24

Publications (1)

Publication Number Publication Date
WO1993018974A1 true WO1993018974A1 (fr) 1993-09-30

Family

ID=20385726

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/000247 WO1993018974A1 (fr) 1992-03-24 1993-03-24 Dispositif permettant de couper et retirer des bandes d'emballage d'articles emballes

Country Status (5)

Country Link
EP (1) EP0631557A1 (fr)
AU (1) AU3912193A (fr)
FI (1) FI944409A (fr)
SE (1) SE9200912L (fr)
WO (1) WO1993018974A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750240A1 (fr) * 1995-06-23 1996-12-27 Teepak, Inc. Méthode de détection de position sur un produit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE394096B (sv) * 1974-07-04 1977-06-06 Munkedals Ab Anordning for kapning av godssammanhallande trad, spec. i samband med pappersmassabalar.
DE3229765A1 (de) * 1982-08-10 1984-02-16 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Vorrichtung zum entfernen einer banderole von einem blattbuendel
SE454978B (sv) * 1986-09-15 1988-06-13 Trancel Conveying Systems Ab Anordning for avlegsnande av tradar eller band fran kroppar sasom forpackningar
US4838751A (en) * 1985-07-11 1989-06-13 Tokushu Paper Manufacturing Co., Ltd. Bale unpacking method and system therefor
US5090864A (en) * 1989-10-30 1992-02-25 Trutzschler Gmbh & Co. Kg Method of opening fiber bales

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE394096B (sv) * 1974-07-04 1977-06-06 Munkedals Ab Anordning for kapning av godssammanhallande trad, spec. i samband med pappersmassabalar.
DE3229765A1 (de) * 1982-08-10 1984-02-16 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Vorrichtung zum entfernen einer banderole von einem blattbuendel
US4838751A (en) * 1985-07-11 1989-06-13 Tokushu Paper Manufacturing Co., Ltd. Bale unpacking method and system therefor
SE454978B (sv) * 1986-09-15 1988-06-13 Trancel Conveying Systems Ab Anordning for avlegsnande av tradar eller band fran kroppar sasom forpackningar
US5090864A (en) * 1989-10-30 1992-02-25 Trutzschler Gmbh & Co. Kg Method of opening fiber bales

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750240A1 (fr) * 1995-06-23 1996-12-27 Teepak, Inc. Méthode de détection de position sur un produit

Also Published As

Publication number Publication date
EP0631557A1 (fr) 1995-01-04
SE9200912L (sv) 1993-09-25
AU3912193A (en) 1993-10-21
FI944409A (fi) 1994-11-15
SE9200912D0 (sv) 1992-03-24
FI944409A0 (fi) 1994-09-23

Similar Documents

Publication Publication Date Title
US20090113853A1 (en) Package unbundling system
JP2586993B2 (ja) 帯ひもによる結束機及び結束方法
US4541763A (en) Apparatus for forming a stack of signatures
EP0414487B1 (fr) Procédé et appareillage pour la commande de stock tampon dans des systèmes de convoyage
US4011155A (en) Wrapped package inspection and rejection apparatus
US4538511A (en) Signature handling apparatus
CA2657396C (fr) Systeme de rejet retourneur/separateur
US7757353B2 (en) Digesting cylindrical modules
US2879636A (en) Wrapper applying machine for newspapers
EP1294611A1 (fr) Procede et appareil d'enrobage du sommet et de la base d'une charge
CA1228010A (fr) Banderoleuse a selection de longueur de pellicule d'emballage
US4882892A (en) Dual station wrapping machine
JPS5819540B2 (ja) 荷物の荷造りテ−プを解きそして細かに切断する装置
US3684279A (en) Device for removing copies from normal path of travel
EP0258243A1 (fr) Dispositif dans une machine de manutention d'emballages.
EP0631557A1 (fr) Dispositif permettant de couper et retirer des bandes d'emballage d'articles emballes
US6289652B1 (en) Method and apparatus for wrapping a load
US4018351A (en) Apparatus for handling bundles of sheets
WO1993018973A1 (fr) Dispositif permettant de retirer des bandes d'emballage d'articles emballes
US6238174B1 (en) Sticker transfer for lumber stacker
US6206366B1 (en) Antidrop protector for sheet-stacking apparatus
US2991603A (en) Stack handling machine for newspapers and the like
US2994998A (en) Top wrapper applying machine for newspapers
JPH04213516A (ja) 特に俵又は束縛用ワイヤ除去位置における俵用コンベヤ装置
EP0982106B1 (fr) Dispositif d'évacuation de déchets pour une machine pour le découpage de rouleaux de papier ou d'objets similaires

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR CA CH CZ DE DK ES FI GB HU JP KP KR KZ LK LU MG MN MW NL NO NZ PL PT RO RU SD SE SK UA US VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1993908224

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 944409

Country of ref document: FI

WWP Wipo information: published in national office

Ref document number: 1993908224

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1993908224

Country of ref document: EP