EP0941953A1 - Sauggreifereinrichtung - Google Patents

Sauggreifereinrichtung Download PDF

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Publication number
EP0941953A1
EP0941953A1 EP99104645A EP99104645A EP0941953A1 EP 0941953 A1 EP0941953 A1 EP 0941953A1 EP 99104645 A EP99104645 A EP 99104645A EP 99104645 A EP99104645 A EP 99104645A EP 0941953 A1 EP0941953 A1 EP 0941953A1
Authority
EP
European Patent Office
Prior art keywords
suction
valve
unit
cavity
conduit
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.)
Granted
Application number
EP99104645A
Other languages
English (en)
French (fr)
Other versions
EP0941953B1 (de
Inventor
Mario Spatafora
Franco Carini
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.)
GD SpA
Original Assignee
GD SpA
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 GD SpA filed Critical GD SpA
Publication of EP0941953A1 publication Critical patent/EP0941953A1/de
Application granted granted Critical
Publication of EP0941953B1 publication Critical patent/EP0941953B1/de
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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0883—Construction of suction grippers or their holding devices
    • 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
    • B65H3/42—Separating articles from piles by two or more separators mounted for movement with, or relative to, rotary or oscillating bodies

Definitions

  • the present invention relates to a suction gripping unit.
  • Cigarette packing machines are known to employ a suction gripping unit for feeding blanks successively between a blank pickup station, located at a blank store, and a supply station where the blanks are transferred to respective seats on a packing wheel.
  • Known suction gripping units comprise a wheel supporting a number of suction heads, in each of which is defined a cavity communicating on one side with the outside atmosphere via a through hole controlled by a first valve, and connected on the other side to a discharge head suction pump by a conduit controlled by a second valve normally housed in the conduit at a given distance from the cavity.
  • the two valves are normally incorporated into a single slide valve.
  • a suction head of the aforementioned type is disclosed in US patent No. 4,009,876 or in EP patent application No. 317,232.
  • the head is brought into contact with the blank, which closes the cavity to define, with the cavity, a suction chamber in which a vacuum (with respect to atmospheric pressure) is formed by closing the first valve and opening the second.
  • a vacuum with respect to atmospheric pressure
  • atmospheric pressure is restored inside the suction chamber by opening the first valve and closing the second.
  • the response time of the gripping unit i.e. the time taken to activate and deactivate the suction force, depends on the total volume of the suction chamber, the performance of the suction pump, and the size of said through hole; the total volume of the suction chamber being equal to the volume of the cavity plus the volume of the conduit portion between the cavity and the second valve.
  • the first valve is made necessary by using a discharge head suction pump, which is characterized by a relatively high discharge head and a relatively low flow rate, and could not operate correctly in the presence of high load losses such as those which would be induced by the through hole if this were not closed during suction by the first valve.
  • a suction gripping unit comprising at least one suction head; at least one cavity defined in said suction head; suction means for creating a vacuum inside said cavity, said suction means comprising a conduit communicating with said cavity, a suction pump connected to said conduit and a control valve located along said conduit; characterized in that said valve is located between said pump and said cavity and close to the cavity; at least one through hole being formed in said suction head to connect said cavity permanently with the outside atmosphere.
  • Number 1 in Figure 1 indicates as a whole a continuous packing machine comprising a powered packing wheel 2, which rotates continuously (anticlockwise in Figure 1) about a respective axis (not shown) perpendicular to the Figure 1 plane, and in turn comprises a number of hollow, equally spaced, peripheral seats 3 (only one shown) for successively receiving respective prefolded blanks 4 of cardboard or similar material.
  • Machine 1 also comprises a store 5 for a stack 6 of blanks 4; and a suction gripping unit 7 interposed between a pickup station S1 at the open end 8 of store 5 and a supply station S2 at packing wheel 2, and for extracting blanks 4 from end 8 and feeding them successively to respective seats 3.
  • Gripping unit 7 comprises a powered roller 9 rotating continuously clockwise in Figure 1 about a respective fixed central axis 10 parallel to the axis (not shown) of wheel 2 and perpendicular to a longitudinal axis 11 of store 5.
  • Roller 9 comprises an inner chamber 12 connected by a conduit 13 to a suction pump 14, preferably a so-called "side-channel” pump, for creating in chamber 12 a vacuum with respect to the atmospheric pressure outside.
  • Roller 9 supports a number of pneumatic gripping heads 15 distributed about axis 10 and connected to roller 9 via the interposition of respective arms 16.
  • each head 15 is substantially in the form of a plate, which is connected on one side to respective arm 16, and is defined on the other side by a gripping surface 17 in which a cavity 18 is defined by an annular edge 19 and connected to chamber 12 by a respective conduit 20 formed along respective arm 16.
  • gripping surface 17 is substantially defined by the top surface of edge 19.
  • each conduit 20 houses a valve 22 for controlling conduit 20, i.e. for opening or closing conduit 20 to connect or disconnect it from respective cavity 18.
  • a through hole 23 is formed in each head 15 so that respective cavity 18 communicates permanently with the outside atmosphere.
  • Each valve 22 is a known mechanical valve, and comprises a head 24; an annular seat 25 engaged by head 24 and formed at respective joint 21; and a control rod 26, which is fitted in axially-sliding manner to two perforated supporting walls 27 (Figure 3) housed inside conduit 20, and is moved axially, by an actuating device 28 and in a radial direction with respect to axis 10, between an open position ( Figure 2a) in which cavity 18 is connected pneumatically to conduit 20 and therefore to chamber 12, and a closed position ( Figure 2b) in which cavity 18 is isolated pneumatically from conduit 20 and therefore from chamber 12.
  • Actuating device 28 comprises a body 29, which is fitted to the end of respective rod 26 opposite the end connected to respective head 24, and is fitted to roller 9 so as to slide, together with rod 26, in a radial direction with respect to axis 10 and so move rod 26 between said open and closed positions.
  • Actuating device 28 comprises a spring 30, which is located radially with respect to a wall 31 defining chamber 12 and coaxially with respect to respective rod 26, and is compressed between a respective wall 27 and body 29 to normally maintain rod 26 in said closed position.
  • Actuating device 28 also comprises a cylindrical rod 32, which is fitted to body 29 so as to slide longitudinally, with respect to body 29, along a respective axis 33 parallel to axis 10, and is fitted in rotary manner at one end with a tappet roller 34 cooperating with a fixed cam 35.
  • Cam 35 is so formed that, as roller 9 rotates about axis 10, body 29, and therefore respective rod 26, of each head 15 is moved, in a radial direction with respect to axis 10, between said open position and said closed position.
  • Actuating device 36 for cutting off control of respective valve 22, and which moves rod 32 between a work position ( Figure 2) in which roller 34 engages cam 35, and a rest position ( Figure 4) in which roller 34 is detached from cam 35.
  • Actuating device 36 comprises a known magnetic actuator 37 which, when energized, moves rod 32 along axis 33 from said work position to said rest position; and a spring 38 located coaxially with rod 32 between body 29 and roller 34 to normally maintain rod 32 in said work position.
  • each seat 3 is formed in an outer surface 39 of a respective head 40 opposite an inner portion of head 40 connected to wheel 2 so as to oscillate, with respect to wheel 2, about a respective axis 41 parallel to axis 10 under the control of a known cam-rocker arm control device not shown.
  • Each seat 3 comprises two lateral surfaces 42 sloping towards each other and towards a bottom surface 43 through which are formed a number of holes 44 by which a known suction device (not shown) communicates externally.
  • the relatively small volume of the suction chamber provides for achieving extremely rapid response of gripping head 15, which at the same time is cheap and easy to produce by comprising only one valve 22.
  • gripping unit 7 Operation of gripping unit 7 will be described with reference to Figure 1, with reference to one gripping head 15, and as of the instant in which head 15, having released a blank 4 inside a respective seat 3 at supply station S2, is moved by the rotation of roller 9 towards pickup station S1 to withdraw another blank 4.
  • valve 22 of head 15 is maintained in said closed position.
  • gripping head 15 withdraws the blank 4 contacting end 8 of store 5 and retains it by suction on gripping surface 17. More specifically, at a given point in its movement, gripping head 15 is positioned with gripping surface 17 substantially contacting the blank 4 contacting end 8; and, just before said position is reached, actuating device 28 moves valve 22 into said open position to connect cavity 18 to chamber 12 and, via cavity 18, activate the suction force causing the blank 4 contacting end 8 to adhere to gripping surface 17.
  • head 15 leaves pickup station S1 in which blank 4 has been withdrawn, and is fed to supply station S2 where blank 4 is fed to a respective seat 3 on a respective head 40.
  • head 40 is oscillated in known manner about respective axis 41 by said known cam-rocker arm device (not shown) so as to remain a given length of time facing gripping surface 17 of head 15.
  • head 15 is inserted inside seat 3 so that gripping surface 17 is positioned substantially contacting surface 43; and, just before said position is reached, actuating device 28 moves valve 22 into said closed position to cut off the suction through cavity 18, and the suction through holes 44 in surface 43 is activated to release blank 4 inside and adhering by suction to seat 3.
  • the insertion of head 15 inside respective seat 3 provides for folding blank 4 into a U along respective known preformed bend lines (not shown) as blank 4 is fed into seat 3.
  • the respective head 15 To prevent a blank 4 from being fed into a seat 3, the respective head 15 must be prevented from withdrawing a blank 4 as it travels through station S1, which function is provided for by actuating device 36 of head 15. More specifically, throughout the passage of head 15 through station S1, respective magnetic actuator 37 is maintained energized to detach roller 34 from cam 35 and so prevent respective valve 22 from being opened, so that, in the absence of suction, gripping surface 17, as it travels through station S1, is brought into contact with, but fails to withdraw, the blank 4 at end 8.
  • cavity 18 is divided into a number of elementary cavities separated and maintained pneumatically connected to one another by perforated sections; and surface 17 is defined by the top surface of edge 19 and by the top surfaces of said sections to provide a larger supporting surface for blank 4.
  • cavity 18 communicates permanently with the outside atmosphere via a number of small-diameter through holes 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Making Paper Articles (AREA)
  • Manipulator (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Massaging Devices (AREA)
EP99104645A 1998-03-11 1999-03-09 Sauggreifereinrichtung Expired - Lifetime EP0941953B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO980147 1998-03-11
IT98BO000147A IT1299894B1 (it) 1998-03-11 1998-03-11 Unita' di presa ad aspirazione.

Publications (2)

Publication Number Publication Date
EP0941953A1 true EP0941953A1 (de) 1999-09-15
EP0941953B1 EP0941953B1 (de) 2003-05-21

Family

ID=11343015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104645A Expired - Lifetime EP0941953B1 (de) 1998-03-11 1999-03-09 Sauggreifereinrichtung

Country Status (6)

Country Link
EP (1) EP0941953B1 (de)
CN (1) CN1128752C (de)
DE (1) DE69907999T2 (de)
ES (1) ES2199495T3 (de)
IT (1) IT1299894B1 (de)
RU (1) RU2216498C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655244A3 (de) * 2004-09-15 2006-06-21 Ferag AG Verfahren und Vorrichtung zur Vereinzelung von flachen Gegenständen aus einem liegenden Stapel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI711572B (zh) 2015-12-01 2020-12-01 荷蘭商耐克創新有限合夥公司 拾取工具、材料拾取系統以及藉由拾取工具移動材料的方法
CN117819123B (zh) * 2024-03-01 2024-05-03 中建三局集团有限公司 一种洗墙灯贴透镜机装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946361A1 (de) * 1969-09-12 1971-04-08 Adnumat Geraetebaugmbh & Co Saugerkopf
US4009876A (en) * 1975-03-24 1977-03-01 Uniplex, Inc. Sheet feeding mechanism
EP0317232A2 (de) * 1987-11-16 1989-05-24 Tekmax Inc. Zuführeinrichtung für Platten
EP0775655A1 (de) * 1995-11-22 1997-05-28 MAN Roland Druckmaschinen AG Saug- und/oder Blasluftsteuerung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224694A (en) * 1992-02-27 1993-07-06 R. R. Donnelley & Sons Co. Selectively disabled signature feeding apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946361A1 (de) * 1969-09-12 1971-04-08 Adnumat Geraetebaugmbh & Co Saugerkopf
US4009876A (en) * 1975-03-24 1977-03-01 Uniplex, Inc. Sheet feeding mechanism
EP0317232A2 (de) * 1987-11-16 1989-05-24 Tekmax Inc. Zuführeinrichtung für Platten
EP0775655A1 (de) * 1995-11-22 1997-05-28 MAN Roland Druckmaschinen AG Saug- und/oder Blasluftsteuerung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655244A3 (de) * 2004-09-15 2006-06-21 Ferag AG Verfahren und Vorrichtung zur Vereinzelung von flachen Gegenständen aus einem liegenden Stapel

Also Published As

Publication number Publication date
CN1128752C (zh) 2003-11-26
EP0941953B1 (de) 2003-05-21
DE69907999T2 (de) 2004-05-19
CN1229044A (zh) 1999-09-22
ES2199495T3 (es) 2004-02-16
RU2216498C2 (ru) 2003-11-20
ITBO980147A1 (it) 1999-09-11
ITBO980147A0 (it) 1998-03-11
IT1299894B1 (it) 2000-04-04
DE69907999D1 (de) 2003-06-26

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