EP0753460A1 - Butée d'arrêt - Google Patents

Butée d'arrêt Download PDF

Info

Publication number
EP0753460A1
EP0753460A1 EP96106417A EP96106417A EP0753460A1 EP 0753460 A1 EP0753460 A1 EP 0753460A1 EP 96106417 A EP96106417 A EP 96106417A EP 96106417 A EP96106417 A EP 96106417A EP 0753460 A1 EP0753460 A1 EP 0753460A1
Authority
EP
European Patent Office
Prior art keywords
stop piece
lead screw
helical compression
compression spring
base plate
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
EP96106417A
Other languages
German (de)
English (en)
Other versions
EP0753460B1 (fr
Inventor
Norbert Christmann
Gerhard Dipl.-Ing. Fries
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.)
Tiromat Kraemer and Grebe GmbH and Co KG
Original Assignee
Tetra Laval Convenience Food GmbH and Co KG
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 Tetra Laval Convenience Food GmbH and Co KG filed Critical Tetra Laval Convenience Food GmbH and Co KG
Publication of EP0753460A1 publication Critical patent/EP0753460A1/fr
Application granted granted Critical
Publication of EP0753460B1 publication Critical patent/EP0753460B1/fr
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
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/14—Feeding webs from rolls by grippers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch
    • Y10T403/602—Biased catch or latch by separate spring

Definitions

  • the invention relates to an annular stop piece for the moving spring end of a cylindrical helical compression spring overlapping a coaxial lead screw, the stop piece being provided axially oriented in a radial, concentric retaining groove of the lead screw, in particular for a tension piece which is loaded by the helical compression spring and can be released against its spring force on a conveyor chain for tensioning and subsequent transport of a packaging film web in a packaging machine, and a tensioning piece provided with such a stop piece.
  • Link chains have proven particularly useful, each link being provided with a corresponding tensioning piece, which is opened when a first sprocket overflows, so that the edge of a packaging film web is gripped and tensioned, and in the same way when a second sprocket overflows is opened, whereby the (now processed) packaging film web is released.
  • the tensioning pieces used and opening and / or closing when the sprockets overrun generally use tensioning elements which are moved against the force of helical compression springs by means of a pressure bolt when a sprocket is overrun. It goes without saying that the tensioning forces required for the packaging film webs must be chosen to be very large throughout in order to ensure proper clamping, during which a deformation of the packaging film web must also be possible.
  • the movable spring end of the helical compression spring must therefore be intercepted by a high-strength stop piece.
  • a snap ring in the lead screw against which this spring end rests. Snap rings are made entirely of elastic and non-rusting spring steel; if the packaged goods are food, the use of such a snap ring is not desirable for hygienic reasons.
  • a snap ring does not offer sufficient Assurance that it does not come loose from the lead screw, for example, if it is installed incorrectly and is not provided with the necessary clamping force on the lead screw, which is also the case if the diameter at the base of the retaining groove is outside the required one for the snap ring Tolerance lies. Regardless of whether this diameter is too small or too large, the snap ring can then move away from the area of the lead screw during operation and conjure up the sudden relaxation of the clamping piece, which can damage the associated conveyor. Checking whether the snap ring is properly installed under pretension is not possible with simple means suitable for workshop operation or is too expensive. Proper assembly is therefore undesirably dependent on the skill and conscientiousness of the assembly personnel.
  • the invention has therefore set itself the task of forming an annular stop piece of the type specified in the introduction so that it can be used without hesitation when it comes into contact with food, and furthermore, after its assembly with the lead screw, a very secure stop for the movable spring end of the helical compression spring forms, without having to make special demands on the skill and reliability of the assembly personnel; only its installation, for example in a clamping piece, should already provide the guarantee that the stop piece will reliably orient the movable spring end of the helical compression spring even with continuously high dynamic and thereby constantly changing loading and unloading and any length of operating time.
  • stop piece should still be cheap to produce and require no additional space and assembly effort.
  • the object is achieved in that the stop piece consists of a flat, circular base plate and a ring-cylindrical collar pointing at the outer edge of the base plate in the direction of the spring end and at least predominantly encompassing the spring end, and the inner edge bearing against the base of the retaining groove the base plate is connected to the outer edge by an insertion slot, the width of the insertion slot being adapted to the diameter at the base of the holding groove and being dimensioned such that the stop piece can just be pushed onto the base of the holding groove without jamming.
  • the collar is formed by a flange on the outer edge of the base plate.
  • Such a compact stop piece can be produced in a simple manner as a stamped and bent part and very inexpensively. It is held in place by the helical compression spring itself after it has been installed: the stop piece is only axially loaded by the spring force; lateral forces that may occur on it are unable to push the stop piece out of its central position because it is securely centered over the collar and the spring end. For this reason, complete assembly is also guaranteed with a high level of security: the spring end can only be (clearly visible!) Lowered into the collar on the base plate when the stopper with its insertion slot is inserted so far into the retaining groove that the inner edge of the Base plate is the base of the retaining groove immediately adjacent. If the assembly is incomplete, the spring end is not inside the collar, but lies on it, clearly visible, as an indication that the assembly has not been carried out properly.
  • a hygienic design of the stop piece is ensured if it consists of a rustproof, nutritionally indifferent material, preferably steel.
  • the deformation resistance of the stop piece which is determined by the dimension and material, is selected such that an elastic or permanent deformation is eliminated under the long-term influence of the helical compression spring.
  • the prestressing force can be selected to be very high, so that a correspondingly high prestressing force can be generated if the stop piece is used, for example, on a tensioning piece which is loaded by the helical compression spring and can be released against its spring force.
  • Such a tensioning piece in particular for use on a conveyor chain for tensioning and subsequently transporting a packaging film web in a packaging machine, is advantageously provided on a chain link of a conveyor chain designed as a link chain.
  • the arrangement can expediently be such that the lead screw is axially movably mounted transversely to the conveying direction on a bearing block, which consists of a U-shaped holding bracket attached to the chain link and two bearing brackets, the helical compression spring also striking a bearing bracket apart from the stop piece , on the outside of which a clamping piece for the packaging film, which is integral with the lead screw, rests under the action of the helical compression spring and can be lifted off against the action of the helical compression spring if the lead screw is loaded on an axially aligned thrust pin which is guided through the other bearing bracket and overhanging it, for example from a ring saddle of a chain wheel for the link chain.
  • Such an arrangement uses the stop piece according to the invention very advantageously and is itself of simple construction, so that tension pieces of this type can be cheaply produced in large numbers and attached to the chain links of the link chain.
  • the requirements for the stop piece of the rigid design and the use of a stainless steel are met with very little effort, so that the clamping piece can be used as a whole even when packaging food.
  • the width of the cold groove on the lead screw is at least equal to the thickness of the base plate, preferably but is at least slightly larger than this, and if the retaining groove on the lead screw is optionally provided such that the stop piece is at least slightly spaced from the second bearing plate when the clamping piece is in contact with the first bearing plate.
  • the invention can always be used with advantage if very high pretensioning forces of the helical compression spring have to be mastered on clamping pieces of the type described; however, it is by no means limited to this.
  • the stop piece according to the invention is generally suitable for locking a spring end of such a helical compression spring on a lead screw or the like.
  • FIGS. 1 and 2 show a link chain GK suitable for driving a packaging film web in the region of a chain wheel mounted on a stationary shaft W.
  • KR which is composed of chain links KG.
  • a tensioning piece S is fastened to each chain link KG, as is explained in detail in FIGS. 3 and 4.
  • the tensioning piece S consists of a bearing block 1 which can be fastened, for example riveted, to the associated chain link KG, a lead screw 2, a helical compression spring 3 and a stop piece 4 fastened to the lead screw 2.
  • the U-shaped bearing block 1 folded out of sheet metal in the front view of FIG. 3 is composed in one piece from a holding plate 11 lying on the chain link KG and two parallel bearing plates 12a, 12b bent from the holding plate 11 at a distance a, which are used for storage serve the axially limited movable lead screw 2.
  • a pressure pin 21 and, on the other hand, a clamping piece 22 is formed in a mushroom shape. While the clamping piece 22 rests on the first bearing plate 12a under the load of the helical compression spring 3 overlapping the lead screw 2 when the associated chain link KG is outside the area of the chain wheel KR, it can be lifted off the bearing plate 12a when the chain link KG is in this Area is pulled. As can easily be seen in FIG.
  • the pressure pin 21 comes into the effective area of a ring saddle RS formed in one piece on the sprocket KR and is raised in this effective area against the spring force of the helical compression spring 3: for example, a packaging film web that is to be tensioned can now be between the clamping piece 22 and the bearing plate 12a introduced and when the chain link KG the area the sprocket KR has left again, be tensioned; Similarly, the removal of the packaging film web from the tensioning pieces S takes place on another chain wheel.
  • a retaining groove 23 is recessed, in which the stop piece 4 is inserted axially locked.
  • the helical compression spring 3 is clamped between the bearing bracket 12a and the stop piece 4 with a high preload.
  • the holding groove 23 is determined by the diameter g of its base 23a and its depth t.
  • the stop piece 4 shows how the stop piece 4 is inserted into the holding groove 23.
  • the stop piece 4 is composed in one piece from an annular base plate 41 and a collar 42.
  • the annular cylindrical collar 42 of height h folded out of the base plate 41 surrounds the movable spring end 31 of the helical compression spring 3, the other spring end 32 of which rests on the bearing bracket 12a.
  • the details of the stop piece 4 are shown in Fig.5.
  • An (inner) edge 43a of a central opening 43 adapted to the diameter g of the base 23a of the holding groove 23 is connected by an insertion slot 44 to the (outer) edge 41a of the base plate 41 and is otherwise semicircular, the width b of the insertion slot 44 is dimensioned so that the stop piece 4 can be inserted comfortably, but without much play in the holding groove 23.
  • the assembly of the stop piece 4 is facilitated if the collar 42 ends symmetrically to the insertion slot 44, set back on both sides thereof.
  • the so The recess 42a formed in the collar 42 here has a width k which is somewhat larger than the diameter f of the lead screw 2, so that jamming during assembly is avoided.
  • the stop piece 4 is extremely stable due to the flanged collar 42. It is held securely in situ in the assembled state because of the spring end 31 which rests on the base plate 41 and is surrounded by the collar 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Basic Packing Technique (AREA)
  • Wire Bonding (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Adornments (AREA)
  • Unwinding Webs (AREA)
EP96106417A 1995-07-13 1996-04-24 Mâchoire de serrage Expired - Lifetime EP0753460B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19525523 1995-07-13
DE19525523A DE19525523A1 (de) 1995-07-13 1995-07-13 Anschlagstück

Publications (2)

Publication Number Publication Date
EP0753460A1 true EP0753460A1 (fr) 1997-01-15
EP0753460B1 EP0753460B1 (fr) 1999-02-03

Family

ID=7766726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106417A Expired - Lifetime EP0753460B1 (fr) 1995-07-13 1996-04-24 Mâchoire de serrage

Country Status (6)

Country Link
US (1) US5702044A (fr)
EP (1) EP0753460B1 (fr)
AT (1) ATE176433T1 (fr)
DE (2) DE19525523A1 (fr)
DK (1) DK0753460T3 (fr)
ES (1) ES2128805T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007137629A1 (fr) * 2006-05-30 2007-12-06 Iwis Motorsysteme Gmbh & Co. Kg Chaîne transporteuse à tête de préhension relevable
WO2007137631A1 (fr) * 2006-05-30 2007-12-06 Iwis Motorsysteme Gmbh & Co. Kg Chaîne transporteuse à tête de préhension pivotante
WO2007137630A1 (fr) * 2006-05-30 2007-12-06 Iwis Motorsysteme Gmbh & Co. Kg Chaîne de transport comprenant un dispositif de guidage de pinces de préhension
EP3278954A1 (fr) * 2016-08-04 2018-02-07 MULTIVAC Sepp Haggenmüller SE & Co. KG Machine d'emballage par emboutissage équipée d'une barre de maintien

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10251740A1 (de) 2002-11-05 2004-05-13 Convenience Food Systems Wallau Gmbh & Co. Kg Spannstück einer Transportkette für eine Folienbahn
DE202004021005U1 (de) * 2004-04-05 2006-07-06 Schmezer, Alexander Drucksteife Antriebskette für eine Stellvorrichtung
DE102006036617A1 (de) * 2006-08-04 2008-02-14 JOH. WINKLHOFER & SÖHNE GMBH & Co. KG Förderkette mit separatem umlaufenden Klemmelement
EP2740677A1 (fr) * 2012-12-10 2014-06-11 Multivac Sepp Haggenmüller GmbH & Co. KG Installation de transport pour machine d'emballage par emboutissage
WO2016094405A1 (fr) * 2014-12-08 2016-06-16 EVO Development, LLC Systèmes et procédés d'élimination de rebuts de thermoformage
EP3456642B1 (fr) * 2017-09-15 2023-11-01 Tetra Laval Holdings & Finance S.A. Dispositif de tension pour un système de mâchoire entraîné par chaîne
US11691771B1 (en) * 2022-03-02 2023-07-04 Moshe Epstein Hygienic conveying chain clamp used in a horizontal form fill and seal packaging machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2355921A1 (de) * 1973-11-08 1975-05-15 Waldner Kg H Materialbahn-foerdereinrichtung
FR2484381A1 (fr) * 1980-06-12 1981-12-18 Multivac Haggenmueller Kg Chaine de transport
DE3315419A1 (de) * 1983-04-28 1984-10-31 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Transporteinrichtung zum fuehren einer materialbahn in einer verpackungsmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US969295A (en) * 1909-09-23 1910-09-06 Philip Jacob Meahl Paper-feed mechanism.
US1460538A (en) * 1921-08-20 1923-07-03 Lucian F Easton Locking device for motor valves
US2237877A (en) * 1939-05-05 1941-04-08 James B Fulk Method and apparatus for feeding paper
US3536184A (en) * 1965-12-27 1970-10-27 Morrell & Co John Vacuum packaging apparatus
DE2430497B2 (de) * 1974-06-25 1981-05-21 Krämer & Grebe GmbH & Co KG Maschinen- und Modellfabrik, 3560 Biedenkopf Vorrichtung für die Verpackung von Ware
US4113397A (en) * 1975-10-17 1978-09-12 Snyder Francis H Pinless resilient coupling
US4826065A (en) * 1983-04-28 1989-05-02 Multivac Sepp Haggenmuller Kg Feeding means for feeding a machine web in a packaging machine
US5364201A (en) * 1993-02-08 1994-11-15 Norco, Inc. Hinged strut construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2355921A1 (de) * 1973-11-08 1975-05-15 Waldner Kg H Materialbahn-foerdereinrichtung
FR2484381A1 (fr) * 1980-06-12 1981-12-18 Multivac Haggenmueller Kg Chaine de transport
DE3315419A1 (de) * 1983-04-28 1984-10-31 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Transporteinrichtung zum fuehren einer materialbahn in einer verpackungsmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007137629A1 (fr) * 2006-05-30 2007-12-06 Iwis Motorsysteme Gmbh & Co. Kg Chaîne transporteuse à tête de préhension relevable
WO2007137631A1 (fr) * 2006-05-30 2007-12-06 Iwis Motorsysteme Gmbh & Co. Kg Chaîne transporteuse à tête de préhension pivotante
WO2007137630A1 (fr) * 2006-05-30 2007-12-06 Iwis Motorsysteme Gmbh & Co. Kg Chaîne de transport comprenant un dispositif de guidage de pinces de préhension
EP3278954A1 (fr) * 2016-08-04 2018-02-07 MULTIVAC Sepp Haggenmüller SE & Co. KG Machine d'emballage par emboutissage équipée d'une barre de maintien

Also Published As

Publication number Publication date
US5702044A (en) 1997-12-30
EP0753460B1 (fr) 1999-02-03
ATE176433T1 (de) 1999-02-15
DK0753460T3 (da) 1999-09-20
DE19525523A1 (de) 1997-01-16
DE59601250D1 (de) 1999-03-18
ES2128805T3 (es) 1999-05-16

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