EP0082475A2 - Dispositif fournisseur de rubans semi-rigides d'une pile - Google Patents

Dispositif fournisseur de rubans semi-rigides d'une pile Download PDF

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Publication number
EP0082475A2
EP0082475A2 EP82111646A EP82111646A EP0082475A2 EP 0082475 A2 EP0082475 A2 EP 0082475A2 EP 82111646 A EP82111646 A EP 82111646A EP 82111646 A EP82111646 A EP 82111646A EP 0082475 A2 EP0082475 A2 EP 0082475A2
Authority
EP
European Patent Office
Prior art keywords
strip
suction cup
strips
suction
loader
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.)
Withdrawn
Application number
EP82111646A
Other languages
German (de)
English (en)
Other versions
EP0082475A3 (fr
Inventor
Bruno Corali
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.)
Individual
Original Assignee
Individual
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 IT25732/81A external-priority patent/IT1195245B/it
Priority claimed from IT2191782U external-priority patent/IT8221917V0/it
Application filed by Individual filed Critical Individual
Publication of EP0082475A2 publication Critical patent/EP0082475A2/fr
Publication of EP0082475A3 publication Critical patent/EP0082475A3/fr
Withdrawn legal-status Critical Current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
    • B65H3/24—Separating articles from piles by pushers engaging the edges of the 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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/085—Suction grippers separating from the bottom of pile
    • B65H3/0858—Suction grippers separating from the bottom of pile this action resulting merely in a curvature of each article being separated
    • 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
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42322—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from bottom of the pile

Definitions

  • This invention relates to a device for feeding semirigid strips from a loader, in particular wooden strips for the fabrication of packing boxes.
  • a first order of problems is how to achieve an accurate high speed delivery onto the conveyor belts which transport said strips to subsequent processing stations. These problems have been solved by the strip feeding device which forms the subject of published Italian Patent Application No. 26,824 A/80, by this same Applicant.
  • the second order of problems is how to provide for said device, or any other similar device, to handle the semirigid strips by always delivering one of them at a time to subsequent processing, notwithstanding their thin dimensions.
  • the task of this invention is to provide a device for feeding semirigid strips from a loader, which can reliably eject one strip at a time toward subsequent processing steps.
  • Yet another object of this invention is also to provide a device as indicated, for feeding semirigid strips, which can afford, also in the particular embodiment thereof which will be described and illustrated hereinafter, non-obvious features and teachings for the expert in the art, such as to represent a step forward with respect to the state cfthe art.
  • a device for feeding semirigid strips from a loader of the type provided with pusher means adapted to move the lowermost strip in said loader toward a conveyor belt, characterised in that it comprises at least one suction cup element located below the middle portion of said lowermost strip and effective to flex by suction said strip away from the overlying strips and along the path of movement of said pusher means, and in that a stack of strips introduced in said loader is held by base supports located substantially at the ends of said lowermost strip.
  • the device of this invention comprises a terminating group 1 supporting a loader 2 which contains a stack 3 of strips and is located above a conveyor belt 4, as well as a control unit 5 connected to a main drive shaft 6 of the conveyor belt 4.
  • the control unit 5 comprises essentially a main cam 7 rigid with the main shaft 6, a cam follower 8 keyed to an auxiliary shaft 9, and a fluid dynamic cylinder 10 operative against the bias of the cam follower 8 through a first bar 11.
  • a deflector bar 12 which, through the intermediary of a link 13 will transmit the movement of the cam follower 8 to the terminating group 1, and specifically to a shaft 14, through a second bar 15.
  • Attached to the shaft 14 is a second deflector bar 16 which controls, through a swivel element 17, pusher means acting on the strips 18 of the stack 3.
  • auxiliary members 2a which form in practice pressure members adapted to impart, to each lowermost strip 19 during the ejection thereof, a compressive motion toward its respective seat 21.
  • the terminating group 1 may be constructed as disclosed in the above identified applicant's Patent Application No. 26,824 A/80, which is incorporated hereto for reference purposes.
  • said pusher means generally designated with the reference numeral 22, to include at least one pair of parallel co-planar foil-like elements 23 which are movable in grooves 23a ( Figure 6) arranged symmetrically with respect to the middle of the strips 18, as well as respective active elements 24 engaging with a bracket 25 rigid with the foil-like elements 23.
  • Figure 2 illustrates the construction of an active element 24, and its engagement with a respective bracket 25.
  • the active element presents a rounded lead-in shape to a dog 26 for pushing on a lowermost strip 19.
  • the active element 24 is engaged swivel-fashion through a pivot pin 27 with the bracket 25, and a pin-like spring 28, wound around the pin 27, is provided which acts to hold the pusher dog 26 raised, so that relatively raised strips can also be engaged.
  • Figure 6 shows how the loader 2 includes, in vertical alignment with the grooves 23a which define the lines of action of the active elements 24, stop or detent elements 29 having at the bottom a lug 30 which leaves a space free between itself and the respective groove, proportioned with the lowermost strip 19 being ejected.
  • Figure 6 also shows that the positions of the grooves 23a and of the base supports 31 for the loader 2 are such as to only allow one such flexed strip therethrough, away from the overlying strips 18 in the stack 3.
  • a suction cup element 32 be provided which is effective to flex by suction the lowermost strip 19 being moved away from the overlying strips 18 and along the path followed by the pusher means 22.
  • the suction cup element 32 is associated with first control means 33 ( Figure 4) operative to impart to it first oscillation capabilities in the direction of the lowermost strip 19, and with an oscillating support or holder 34,adapted to impart to the suction cup element 32 second oscillation capabilities in a parallel direction to the ejection movement of the lowermost strip 19.
  • the suction cup element 32 is activated intermittently through the action of second control means 35, shown in Figure 5.
  • the first control.means 33 shown best in Figure 4, are of a mechanical type and derive their motion from the shaft 14 which drives the pusher means 22.
  • an auxiliary cam 36 engaging a cam follower 37 which transmits its oscillations to a pushrod 38 of adjustable length.
  • the pushrod is pivoted to a first lever 39 and acts thereon against the bias of a tension spring 40.
  • the first lever 39 oscillates about a pin 41, and on the side away from said pin acts on a second lever 42 with the intermediary of elastic means.
  • the second lever 42 oscillates about a second pin 43 substantially aligned with the former pin.41 of the first lever 39, and the elastic means are such as to provide for spreading the first and second levers apart when the second lever is prevented from rotating.
  • said elastic means includes a compression spring 44 extending from one end of the first lever 39 to a detent cup 45. The latter is engaged with a nut 46 rigid with a shank 47 extending through the compression spring 44 and ending in an expanded head 48 behind the second lever 42.
  • the first lever 39 will push on the compression spring 44, and the latter act on the second lever 42 through its head 48.
  • the second lever 42 ends below the stack 3 of strips 18 in a shaped lug 49 at least at its end configured yoke-like.
  • the oscillating support 34 With the shaped lug 49, there is engaged said oscillating support 34 which holds the suction cup 32 directly.
  • the oscillating support or holder 34 is pivoted at the bottom to the shaped lug 49 by means of a pin 50, and has substantially a U-like cross-sectional configuration partly enclosing the bottom of the suction cup 32.
  • Figures 4,5 and 6 show how the oscillating support 34 engages with the suction cup element 32 by means of a throughgoing pin 51 which is also connected to elastic bias means 52, e.g. tension springs stretched between said throughgoing pin 51 and a small pin 53 through the second lever 42.
  • FIG. 5 illustrates the second control means 35 operative to control the action of the suction cup element 32 in synchronization with the movements of the suction cup element itself.
  • Said second control means comprises a link 54 extending between the oscillating support 34 and a control unit 55 for controlling the suction force applied to the suction cup element 32.
  • the link 54 extends through the oscillating support 34 and is arranged in abutment relationship therewith through a widening 56, it being pivoted at the opposed end to a small piston 57: protruding out of the control unit 55.
  • the piston 57 extends into the control unit 55 far enough to penetrate a conduit 58 connected to the air suction pump. In particular, the piston 57 enters the area of confluence of the conduit 58 and hose 59, the hose 59 being connected to the suction cup element 32 and to vents 60 arranged at the end of the conduit 54.
  • the piston 7 is shaped with a conically expanding portion 61 adapted to cover the vents 60 under the action of a small compression spring 62, and with disks 63 at the hose 59 connection to the conduit 58. Said disks 63 have a cutout front shape for admitting air therethrough.
  • the inventive device described hereinabove primarily with reference to its construction, operates as follows.
  • the pusher means 22 acts on each lowermost strip 19 through the pusher dog 26 formed on the active element 24 which can oscillate about the pin 27.
  • the active element 24 is rounded off and at the same time biased by the pin spring 28 to a raised position such as to reliably grasp even relatively raised lowermost strips 19.
  • the lowermost strips 19 are thrown into the seats 21 on the conveyor belt 4 moving toward them.
  • the insertion of the strips is facilitated by the auxiliary members 2a compressing them downwards.
  • the same shaft 14 which drives all the active elements 24 also produces the action of the first control means 33 which alternately move the suction cup element 32 to.and away with respect to the strip stack 3.
  • the first control means 33 define a kinematic train which extends from the auxiliary cam 36 to the first lever 39 and hence to the second -ever 42.
  • the first lever 39 is oscillated to raise and lower under control by the auxiliary cam 36 and entrains therealong, through the intervening elastic means, the second lever 42.
  • the second lever 42 oscillates as if it was rigid with the first lever 39 and,when an obstacle prevents the suction cup element 32 from raising, the second lever 42 is stopped and the first lever 39 continues its travel to compress the compression spring 44.
  • the suction cup element 32 can be moved forward toward the lowermost strip 19 and be pressed powerfully thereon without creating binding conditions in the cited kinematic train.
  • Figure 6 also shows how the ejection of the lowermost strip 19 becomes possible only after the latter assumes said lowered position, by inserting itself into the space left below the lugs 30 provided on the stop elements 29.
  • the suction cup element 32 advantageously follows the strip 19 being ejected, at least through a certain distance.
  • the suction cup element is held on the second lever 42 by the oscillating support 34 which, opposing the elastic return means 32, can rotate about the pin 50 and follow the movement of the lowermost strip 19 as imparted by the pusher means 22.
  • this forward movement cannot be extended too much in time, thereby the second control means 35 are brought into operation, which remove the suction force from the suction cup element.
  • the oscillating support 34 in moving forward together with a strip being ejected, entrains therealong the link 54 and piston 57 against the bias of the spring 62.
  • the movement of the piston 57 uncovers the vents 60 provided in the control unit 55, with consequent practical nullification of the suction force through the flexible hose 59 which, in normal conditions, is the only connection between the suction cup element 32 and conduit 54, which is connected to a suction pump.
  • the assembly which draws the lowermost strip in the stack from below comprises a preferably stationary box 70, which has at the top a suction grid 71 (shown in Figure 5a) in the form of a plate of sheet metal having slots 72.
  • Said box 70 is located at a small distance (e.g. a few millimeters away) from the pack of strips 18.
  • the box 70 is connected, by means of a pipe 73, to a continuous suction source, not shown, and the suction capability of the assembly is such that the lowermost strip 19 in the stack is drawn toward the grid, thus allowing the strip to be engaged by the element 24.
  • the device of this invention achieves its objects and secures many important advantages. First of all, that of assuring not only an accurate and fast delivery of said strips, but also the virtual certainty that,at each delivery,one strip only is delivered to the respective seat 21 on the conveyor belt 4.
  • the device is also advantageous in its specific technical aspects as deducible from the specification and drawings, and evident for a person skilled in the art, over similar conventional arrangements.
  • the device is highly compact and adaptable to widely different situations and many apparatus for feeding semirigid strips of any desired types.
  • the materials, as well as the shapes and dimensions may be any selected ones to meet individual requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
EP82111646A 1981-12-21 1982-12-15 Dispositif fournisseur de rubans semi-rigides d'une pile Withdrawn EP0082475A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT2573281 1981-12-21
IT25732/81A IT1195245B (it) 1981-12-21 1981-12-21 Dispositivo per l'erogazione di listelli semirigidi da un caricatore
IT2191782U 1982-05-18
IT2191782U IT8221917V0 (it) 1982-05-18 1982-05-18 Dispositivo per l'erogazione di listelli semirigidi da un caricatore.

Publications (2)

Publication Number Publication Date
EP0082475A2 true EP0082475A2 (fr) 1983-06-29
EP0082475A3 EP0082475A3 (fr) 1983-08-24

Family

ID=26328042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111646A Withdrawn EP0082475A3 (fr) 1981-12-21 1982-12-15 Dispositif fournisseur de rubans semi-rigides d'une pile

Country Status (2)

Country Link
EP (1) EP0082475A3 (fr)
ES (1) ES518254A0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0737635A1 (fr) * 1995-04-12 1996-10-16 Fabriques De Tabac Reunies S.A. Méthode et appareil pour la séparation de structures planes empilées et l'utilisation de cet appareil dans l'emballage de cigarettes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1043275A (en) * 1963-06-21 1966-09-21 Pakko Tryk As Automatic feed device for feeding carton blanks one by one to a machine
DE1237141B (de) * 1962-06-15 1967-03-23 Standard Elektrik Lorenz Ag Einrichtung zum Vereinzeln gestapelter, duenner Blaetter aus Papier
DE2429427B2 (de) * 1974-06-19 1976-04-15 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig, 8510 Fürth Vorrichtung zum vereinzeln gestapelter biegsamer platten
GB2071061A (en) * 1980-02-05 1981-09-16 Thorsted Maskiner As Removing sheets and articles from the bottom of pile using suction sheet etc. deflectors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1237141B (de) * 1962-06-15 1967-03-23 Standard Elektrik Lorenz Ag Einrichtung zum Vereinzeln gestapelter, duenner Blaetter aus Papier
GB1043275A (en) * 1963-06-21 1966-09-21 Pakko Tryk As Automatic feed device for feeding carton blanks one by one to a machine
DE2429427B2 (de) * 1974-06-19 1976-04-15 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig, 8510 Fürth Vorrichtung zum vereinzeln gestapelter biegsamer platten
GB2071061A (en) * 1980-02-05 1981-09-16 Thorsted Maskiner As Removing sheets and articles from the bottom of pile using suction sheet etc. deflectors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0737635A1 (fr) * 1995-04-12 1996-10-16 Fabriques De Tabac Reunies S.A. Méthode et appareil pour la séparation de structures planes empilées et l'utilisation de cet appareil dans l'emballage de cigarettes

Also Published As

Publication number Publication date
ES8400979A1 (es) 1983-12-01
ES518254A0 (es) 1983-12-01
EP0082475A3 (fr) 1983-08-24

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