EP0302534B1 - Chain link with a plate featuring a pincer, for haul-off of a sheet material - Google Patents

Chain link with a plate featuring a pincer, for haul-off of a sheet material Download PDF

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Publication number
EP0302534B1
EP0302534B1 EP19880200192 EP88200192A EP0302534B1 EP 0302534 B1 EP0302534 B1 EP 0302534B1 EP 19880200192 EP19880200192 EP 19880200192 EP 88200192 A EP88200192 A EP 88200192A EP 0302534 B1 EP0302534 B1 EP 0302534B1
Authority
EP
European Patent Office
Prior art keywords
bracket
plate
movable jaw
spring
pincer
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
EP19880200192
Other languages
German (de)
French (fr)
Other versions
EP0302534A3 (en
EP0302534A2 (en
Inventor
Carlo Garbagnati
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.)
REGINA INDUSTRIE S.P.A.
Original Assignee
REGINA INDUSTRIA 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 REGINA INDUSTRIA SpA filed Critical REGINA INDUSTRIA SpA
Publication of EP0302534A2 publication Critical patent/EP0302534A2/en
Publication of EP0302534A3 publication Critical patent/EP0302534A3/en
Application granted granted Critical
Publication of EP0302534B1 publication Critical patent/EP0302534B1/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
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/045—Details of grippers

Definitions

  • the present invention relates to a chain link, one plate of which featuring a pincer, which is economical to manufacture and use and which is intended for the purpose of hauling-off sheet material, particularly but not solely a plastic film.
  • DE-A-3 109 237 discloses a clasping device comprising an elastic element bended in the shape of a pincer.
  • the open movement of the pincer is not determined, since deformations of the elastic element depends on the direction of the pushing action.
  • DE-A-3 001 742 discloses a pincer with an upper element pivoted so as to have a predetermined open movement. A sliding element is inserted in the upper element and protruding downwardly in order to perform the opening of the pincer against a bias spring force. Therefore, three-part device is relatively complex and expensive.
  • DE-A-2 519 610 discloses a two-piece pincer comprising a fixed jaw and a movable jaw thrust to closure by means of a spring. In an intermediate position the movable jaw comprises a cam surface to open the pincer. Fixed and movable jaws are pivotally jointed by means of a bottom end of the movable jaw inserted in a slot of the fixed jaw.
  • the object of the present invention is to embody a device that will satisfy the aforesaid requirements and is simple and economical to manufacture and highly dependable in use.
  • the chain link according to the invention is indicated overall by 10 and one of its plates 11 features a pincer 12.
  • the pincer 12 comprises a fixed jaw 13 on a bracket 14 formed enbloc from the plate 11, and a movable jaw 15 pivoted by means of a pin 16 to a seat 17, said seat also being formed enbloc from the plate 11 by the folding back on an extremity thereof.
  • the movable jaw 15 extends through an aperture 18 in the bracket 14 and is embodied in a single piece comprising a fork 19, which is pivoted to the seat 17 through the agency of the pin 16, and a tongue 20 folded back under the fork 19.
  • the numeral 21 indicates a spring passing through an oversized section of the fork 19 and acting between the tongue 20 and tooth 22 which is inclined from the bracket 14.
  • the spring 21 provides thrust to maintain the movable jaw 15 in the position shown by a continuous line in Figure 2.
  • the spring 21 is retained laterally and guided by the cheeks of the fork 19 in order to prevent it from straying from the compressed working position.
  • the opening of the movable jaw 15 in relation to the fixed jaw 13 so as to be in the open position shown by dashed lines in Figure 2, is effected by a cam means (not shown) acting on the tongue 20, against the action of the return spring 21, so as to cause the movable jaw 15 to rotate about the pin 16 in the direction of the arrow 23. It is noteworthy that the operating end of the jaw 15 moves away from the fixed jaw 13 with a rearward component of motion so that the edge of the film to be gripped can rest itself on the fixed jaw with a vertical movement and thus without interfering with the movable jaw.
  • extruded film, or other sheet material can be laid on the brackets 14 of the chain type haul-off devices positioned proximally to the longitudinal sides of the film, or other sheet material, when the movable jaws 15 are thrust into the open position by the aforesaid cam means, after which the jaws 15 can be closed in a spontaneously automatic manner by relinquishment by the said cam means, so as to lock the sheet material on the fixed jaw 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Discharge By Other Means (AREA)
  • Chain Conveyers (AREA)

Description

  • The present invention relates to a chain link, one plate of which featuring a pincer, which is economical to manufacture and use and which is intended for the purpose of hauling-off sheet material, particularly but not solely a plastic film.
  • As is known to persons with ordinary skill in the art, downstream of a plastic film extruder provision must be made for means that will haul-off the extruded film to a subsequent work-station, at the same time keeping the film appropriately taut.
  • For such purpose it is known to use chain type haul-off devices disposed laterally to the extruded film and featuring means adapted to grip the said film and haul it off in a forward direction. The said haul-off means have to be constructed so that they permit, initially, the laying of the film on the chain and, subsequently, the positive engagement of the said film for its haul-off.
  • For example, DE-A-3 109 237 discloses a clasping device comprising an elastic element bended in the shape of a pincer. The open movement of the pincer is not determined, since deformations of the elastic element depends on the direction of the pushing action.
    DE-A-3 001 742 discloses a pincer with an upper element pivoted so as to have a predetermined open movement. A sliding element is inserted in the upper element and protruding downwardly in order to perform the opening of the pincer against a bias spring force. Therefore, three-part device is relatively complex and expensive. DE-A-2 519 610 discloses a two-piece pincer comprising a fixed jaw and a movable jaw thrust to closure by means of a spring. In an intermediate position the movable jaw comprises a cam surface to open the pincer. Fixed and movable jaws are pivotally jointed by means of a bottom end of the movable jaw inserted in a slot of the fixed jaw.
  • The object of the present invention is to embody a device that will satisfy the aforesaid requirements and is simple and economical to manufacture and highly dependable in use.
  • This object is attained by a chain link of the type in which a plate is provided with a pincer for hauling-off a sheet material, said pincer comprising a fixed jaw and a movable jaw pivoted between each other and thrust to closure by means of a spring, the movable jaw comprising a cam thrusting surface for the opening of the pincer against the action of the spring, whereby the plate comprises enbloc a bracket extending laterally at right angle from the upper side of the plate, the free end of said bracket constituting in its upper side the said fixed jaw, the lower side of the bracket forming pivoting means for the movable jaw, the upper free end of the movable jaw passing through an aperture in the bracket and being bended so as to form the movable jaw, and between the movable jaw and the bracket being placed a thrusting spring for the closure of the movable jaw against the fixed jaw (such a chain link is known from DE-A-2 519 610), characterized by the fact that the lower side of the bracket is rolled up so as to form a seat for a pin parallel to the bracket and to the plate, the movable jaw being constituted by an L shaped element placed close to the said plate in order to have a first side of the L substantially parallel to the plate and a second lower side substantially parallel to the bracket, the first side of the L bringing lateral fins bended towards the plate so as to form a fork having a free end holed in order to receive the said pin in the seat thus furnishing said pivoting means between plate and L shaped element, said thrusting spring being placed between the lower side of the L shaped element and the bracket.
  • The structural and functional characteristics of the invention, and its advantages over the known art, will become more apparent from an examination of the following description, referred to the appended drawings, which show an example of a chain link embodied in accordance with the innovative principles of the invention. In the drawings:
    • Figure 1 is an enlarged perspective view of the chain link in question; and
    • Figure 2 is an enlarged vertical section illustrating the same link as in Figure 1 after assembly, where the movable jaw of the pincer is shown in the open position by a dashed line.
  • With reference to the drawings, the chain link according to the invention is indicated overall by 10 and one of its plates 11 features a pincer 12. The pincer 12 comprises a fixed jaw 13 on a bracket 14 formed enbloc from the plate 11, and a movable jaw 15 pivoted by means of a pin 16 to a seat 17, said seat also being formed enbloc from the plate 11 by the folding back on an extremity thereof.
  • As can be clearly seen from the appended drawings, the movable jaw 15 extends through an aperture 18 in the bracket 14 and is embodied in a single piece comprising a fork 19, which is pivoted to the seat 17 through the agency of the pin 16, and a tongue 20 folded back under the fork 19.
  • The numeral 21 indicates a spring passing through an oversized section of the fork 19 and acting between the tongue 20 and tooth 22 which is inclined from the bracket 14. The spring 21 provides thrust to maintain the movable jaw 15 in the position shown by a continuous line in Figure 2. For thus purpose, and as is clearly shown in the Figures, the spring 21 is retained laterally and guided by the cheeks of the fork 19 in order to prevent it from straying from the compressed working position.
  • The opening of the movable jaw 15 in relation to the fixed jaw 13 so as to be in the open position shown by dashed lines in Figure 2, is effected by a cam means (not shown) acting on the tongue 20, against the action of the return spring 21, so as to cause the movable jaw 15 to rotate about the pin 16 in the direction of the arrow 23. It is noteworthy that the operating end of the jaw 15 moves away from the fixed jaw 13 with a rearward component of motion so that the edge of the film to be gripped can rest itself on the fixed jaw with a vertical movement and thus without interfering with the movable jaw. This means that extruded film, or other sheet material, can be laid on the brackets 14 of the chain type haul-off devices positioned proximally to the longitudinal sides of the film, or other sheet material, when the movable jaws 15 are thrust into the open position by the aforesaid cam means, after which the jaws 15 can be closed in a spontaneously automatic manner by relinquishment by the said cam means, so as to lock the sheet material on the fixed jaw 13.
  • There is in this manner attained the object referred to in the introductory part of the specification, i.e. the embodiment of a haul-off device of remarkable simplicity and economy and highly dependable in use.

Claims (3)

  1. Chain link of the type in which a plate (11) is provided with a pincer (12) for hauling-off a sheet material, said pincer (12) comprising a fixed jaw (13) and a movable jaw (15) pivoted between each other and thrust to closure by means of a spring (21), the movable jaw (15) comprising a cam thrusting surface for the opening of the pincer against the action of the spring, whereby the plate (11) comprises enbloc a bracket (14) extending laterally at right angle from the upper side of the plate (11), the free end of said bracket (14) constituting in its upper side the said fixed jaw (13), the lower side of the bracket forming pivoting means (16, 17) for the movable jaw (15), the upper free end of the movable jaw (15) passing through an aperture (18) in the bracket (14) and being bended so as to form the movable jaw (15), and between the movable jaw (15) and the bracket (14) being placed a thrusting spring (21) for the closure of the movable jaw (15) against the fixed jaw (13), characterized by the fact that the lower side of the bracket is rolled up so as to form a seat (17) for a pin (16) parallel to the bracket (14) and to the plate (11), the movable jaw (15) being constituted by an L shaped element placed close to the said plate (11) in order to have a first side of the L substantially parallel to the plate (11) and a second lower side substantially parallel to the bracket (14), the first side of the L bringing lateral fins bended toward the plate (11) so as to form a fork (19) having a free end holed in order to receive the said pin (16) in the seat (17) thus furnishing said pivoting means between plate and L shaped element, said thrusting spring (21) being placed between the lower side (20) of the L shaped element and the bracket (14).
  2. Chain link according to claim 1, characterized by the fact that the spring (21) is provided with an upper end engaged to a tooth (22) folded back by said bracket (14), the spring (21) passing through an oversized section of said fork which retains it laterally.
  3. Chain link according to claim 2, characterized by the fact that the tooth (22) protrudes from a side of the bracket (14) close to the plate (11).
EP19880200192 1987-08-03 1988-02-04 Chain link with a plate featuring a pincer, for haul-off of a sheet material Expired - Lifetime EP0302534B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2216287U 1987-08-03
IT2216287U IT211781Z2 (en) 1987-08-03 1987-08-03 CHAIN LINK WITH PLATE EQUIPPED WITH GRIPPER FOR DRAGING A SHEET MATERIAL.

Publications (3)

Publication Number Publication Date
EP0302534A2 EP0302534A2 (en) 1989-02-08
EP0302534A3 EP0302534A3 (en) 1990-04-04
EP0302534B1 true EP0302534B1 (en) 1994-05-04

Family

ID=11192428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880200192 Expired - Lifetime EP0302534B1 (en) 1987-08-03 1988-02-04 Chain link with a plate featuring a pincer, for haul-off of a sheet material

Country Status (4)

Country Link
EP (1) EP0302534B1 (en)
DE (1) DE3889394T2 (en)
ES (1) ES2051826T3 (en)
IT (1) IT211781Z2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8809355U1 (en) * 1988-07-22 1989-09-07 Fabricius, Karl, Huenenberg, Ch
SE468765B (en) * 1991-05-24 1993-03-15 Wamag Idab Ab SIDOGRIC TRANSPORT
DE4339092C2 (en) * 1993-11-16 1995-10-19 Hubertus Dipl Ing Hein Transport device for flat material
DE10047395B4 (en) * 1999-10-26 2013-11-28 Heidelberger Druckmaschinen Ag Transport system for flat products
FR2871147B1 (en) * 2004-06-02 2006-09-22 Matam France Sa DEVICE FOR CONTINUOUSLY DRIVING A BAND OF DEFORMABLE MATERIAL
BR112015000503A2 (en) * 2012-07-20 2017-06-27 Coloplast As manufacturing system for processing a blanket, chain link to a system, and method for manufacturing a blanket using the system
EP2740677A1 (en) * 2012-12-10 2014-06-11 Multivac Sepp Haggenmüller GmbH & Co. KG Transport device for deep draw packaging machine
DE202012013216U1 (en) 2012-12-10 2015-06-17 Multivac Sepp Haggenmüller Gmbh & Co. Kg Transport device for thermoforming packaging machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT316428B (en) * 1970-11-19 1974-07-10 Otto Haemmerle Maschb Overrun runner for the temporary opening of transport clamps for web-shaped materials
DE3001742A1 (en) * 1980-01-18 1981-07-23 Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn Plastics foil holding clamp on conveyor chain - is spring loaded and hinged on stirrup and tongue in stirrup shank openings
DE3025697C2 (en) * 1980-07-07 1982-11-18 Joh. Winklhofer & Söhne, 8000 München Device for the temporary clamping of sheet material
DE3109237C2 (en) * 1981-03-11 1983-09-01 Joh. Winklhofer & Söhne, 8000 München Device for the temporary clamping of material
DE3315419A1 (en) * 1983-04-28 1984-10-31 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden TRANSPORTATION DEVICE FOR GUIDING A MATERIAL RAIL IN A PACKING MACHINE

Also Published As

Publication number Publication date
EP0302534A3 (en) 1990-04-04
IT8722162V0 (en) 1987-08-03
EP0302534A2 (en) 1989-02-08
DE3889394T2 (en) 1994-11-10
ES2051826T3 (en) 1994-07-01
DE3889394D1 (en) 1994-06-09
IT211781Z2 (en) 1989-05-08

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