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EP3798145A1 - Moyen de fixation pour le canal à bande d'une machine à cercler - Google Patents

Moyen de fixation pour le canal à bande d'une machine à cercler Download PDF

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Publication number
EP3798145A1
EP3798145A1 EP20198453.1A EP20198453A EP3798145A1 EP 3798145 A1 EP3798145 A1 EP 3798145A1 EP 20198453 A EP20198453 A EP 20198453A EP 3798145 A1 EP3798145 A1 EP 3798145A1
Authority
EP
European Patent Office
Prior art keywords
support frame
elements
frame
fastening
straight
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
EP20198453.1A
Other languages
German (de)
English (en)
Other versions
EP3798145B1 (fr
Inventor
Dieter Banholzer
Johannes VAN DER BEEK
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.)
Mosca GmbH
Original Assignee
Mosca GmbH
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 DE102020118163.9A external-priority patent/DE102020118163A1/de
Application filed by Mosca GmbH filed Critical Mosca GmbH
Publication of EP3798145A1 publication Critical patent/EP3798145A1/fr
Application granted granted Critical
Publication of EP3798145B1 publication Critical patent/EP3798145B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00Bundling articles
    • B65B13/02Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/04Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes with means for guiding the binding material around the articles prior to severing from supply
    • B65B13/06Stationary ducts or channels

Definitions

  • the invention relates to a strapping machine with a tape guide frame, which has a tape channel for a flat strapping tape, according to the preamble of claim 1.
  • Tape guide frames are part of a strapping machine for strapping objects such as stacks of newspapers, packages or the like by means of a flat tape.
  • the objects are usually transported on a conveyor into the tape guide frame so that they protrude through the plane of the tape guide frame.
  • a flat strapping tape is fed to the tape channel in the tape guide frame by means of the tape drive.
  • the tape guide frame is then opened, the tape loop formed being released in the radially inward direction and surrounding the object to be strapped.
  • the tape loop is then pulled together until it is tightly stretched around the object to be strapped. In this state, the band loop formed is separated from the band supply, and the two ends of the band loop are pressed against each other and connected to each other.
  • the loop ends are usually connected by welding.
  • the tape guide frame has a flat tape channel which is open on one narrow side from which the strapping tape emerges. While the strap is being fed in, the open strap channel is covered. A relative movement between the band channel and cover exposes the narrow side of the band channel.
  • the pamphlet WO 2008/019991 A1 describes a tape guide frame for a strapping machine, which has a flat tape channel, wherein an opening device is arranged on the tape guide frame which opens a narrow side of the flat tape channel by actuating at least one movable cover element which covers the narrow side of the tape channel in a closed position and releases the narrow side of the tape channel in an open position. At least one ejector is arranged on the tape guide frame, which pushes the tape loop formed in the tape channel through the open narrow side out of the tape channel when the opening device is in the open position.
  • Strapping machines with band guide frames which are composed of corner elements and straight elements that are connected to one another, each corner element having a curved section of the band channel and each straight element having a straight section of the band channel, are for example from the publications JP S53-57 088 U , U.S. 3,572,237 A and EP 0 223 988 B1 known.
  • the frame elements are usually not designed as load-bearing components.
  • the strapping machine has a support frame that is made, for example, from sheet metal several millimeters thick. The frame elements are usually attached to this support frame with screws.
  • the fastening clip has a back section to which two parallel legs adjoin.
  • One leg of the fastening clip has at its end a retaining projection which engages behind an edge of a groove in a first side face of the element in a form-fitting manner.
  • the second leg of the fastening clip has a holding projection which positively engages behind an edge of a groove in a second, opposite side surface of the element.
  • the back section of the fastening clip is fastened to a threaded rod with screw nuts, which in turn is fixed to the frame with screw nuts. Such a fastening is complex and costly to manufacture.
  • the JP S49-146 087 U discloses a fastening clip which simultaneously engages around an element of the tape guide frame and a support rod.
  • the element of the band channel is designed with resilient elements which pivot open when the strapping band is pulled out of the band channel.
  • a support frame made of sheet metal for the band channel is in the JP S49-146 087 U not provided. From the EP 0 223 988 spring catches for fastening two elements of the tape guide frame to one another are known.
  • the JP S53 - 57 088 U describes screw fastenings for frame elements.
  • the object of the invention is to simplify the fastening means for the frame elements and, in particular, to enable flexible production of different frame sizes.
  • a screw connection is one of the most common types of connection. It is inexpensive, very durable and easy to assemble. It is necessary that the components screwed together are matched to one another. Screw holes in one component must be aligned with the screw holes in another component. Additional parts such as washers and nuts are often required.
  • the ends of the legs latching with grooves in the side surfaces of the element of the tape guide frame, not only to the connection to the frame element but also to the support frame made of folded sheet metal produce.
  • the support frame has at least one opening through which the fastening clip protrudes, so that the side of the back section facing the element rests against the support frame and thus fixes the element on the support frame.
  • the fastening clip, the support frame and the element of the tape guide frame are matched to one another in such a way that the locking of the fastening clip on the frame element not only fixes the frame element but also creates the connection between the fastening clip and the support frame.
  • the essentially U-shaped one protrudes through an opening in the sheet metal of the support frame and lies with the side of the back section facing the frame element against the sheet metal of the support frame.
  • the constructive solution of letting the fastening clip lock with grooves running in the longitudinal direction of the frame elements enables relative movements between the frame element and the support frame. These relative movements avoid tension or deformation due to temperature changes.
  • different expansions occur when the temperature changes.
  • these expansions can be compensated for by the resilient fastening clips, because their resilient material section can follow the deformation of the frame elements and possibly the support frame.
  • the frame element can be displaced in the longitudinal direction of the fastening clip and thereby also move relative to the support frame because the retaining projections of the fastening clips can be displaced in the grooves of the frame elements.
  • the back section of the fastening clip can be arched so that it draws the element of the tape guide frame elastically towards the support frame.
  • the fastening clip consists of a substantially U-shaped angled sheet metal strip. At its two ends are the projections that engage with the grooves of the frame element.
  • the section of the sheet metal strip lying in between, which forms the back section, is curved, its curvature being convex towards the frame element and towards the support frame clamped between the frame element and the back section.
  • only one leg of the fastening clip can protrude through the opening of the support frame.
  • both legs can also be passed through openings.
  • the openings in the material of the support frame can be closed bores but also cutouts.
  • the butted members of the tape guide frame may comprise corner members and straight members joined together, each corner member having a curved portion of the tape channel and each straight member having a straight portion of the tape channel.
  • a construction of this type offers a particular advantage, namely that any frame size can be implemented in a simple manner.
  • the elements can be standard elements which have the same structure for each corner and for each frame size.
  • the straight elements can be cut to the required length and placed between two corner elements.
  • a number of strapping machines of different sizes can be implemented with very simple means.
  • the straight elements can be fastened to the support frame by means of fastening clips.
  • the corner elements can be screwed to the support frame in a conventional manner. To vary the frame size, it is sufficient to be able to change the length of the legs of the frame. The curve radius, however, does not have to be varied. It can be implemented consistently with standard components in the corner that have proven themselves in practice.
  • the fastening clips engage behind the contour of the element fastened therewith in a form-fitting manner.
  • the frame elements that are fastened with fastening clips can have grooves into which latching elements of the fastening clips engage in a form-fitting manner.
  • the straight elements can have mutually opposite side surfaces on which grooves extending in the longitudinal direction are arranged.
  • the fastening clips have retaining projections which engage in the grooves.
  • the straight elements with the grooves and the straight section of the tape guide channel can be made from an extruded profile. It is therefore possible to create long profiles from which the straight elements are made in a proven and cost-effective manufacturing process of extrusion.
  • these profiles In their cross-section, these profiles have grooves on opposite side surfaces into which, if necessary, latched behind engages. Furthermore, these profiles have a slot which forms the tape guide channel.
  • the support frame has openings through which the fastening clips protrude, which connect the support frame and the straight element to one another in a clip process.
  • the extruded profiles can be manufactured in the predetermined length or cut to length so that the tape guide frame can be manufactured in the correct size to meet the requirements.
  • the corner elements can have depressions on the end faces into which the ends of a straight element can be inserted so that the sections of the band channel in the corner elements and the guide elements are aligned with one another.
  • recesses are attached to the end faces of the corner elements, each of which receives one end of a straight element in such a way that the band channel sections in the corner element and the straight element are aligned with one another. This ensures that the frame elements are securely connected to one another, even if there is a certain amount of play between successive frame elements due to manufacturing tolerances or thermal expansions.
  • the corner elements can be connected to the support frame by means of fastening screws.
  • Fastening screws ensure dimensionally stable fastening of the corner elements. This is important for strapping machines because incorrectly aligned corner elements can lead to malfunctions during strapping.
  • the support frame can have at least one holding opening which protrudes through and is gripped from behind by a holding projection of a corner element, an internal thread being arranged at a distance from this holding opening, into which a fastening screw protruding through the corner element is screwed.
  • openings can be made particularly easily by laser cutting. The insertion of a form-fitting retaining projection and the screwing of the corner elements ensure a firm connection with the support frame.
  • the strapping machine 1 shown is used for strapping objects 7 with a strapping tape 2, which is drawn off from a supply roll 3 by a pull-in device 4 and a tape magazine 5 is fed. From there, the strapping tape is fed by means of a tape conveyor device 6 through a tensioning device 8 to a tape channel in a tape guide frame 9, so that the strapping tape 2 forms a loop. The strapping band 2 is then pulled back by the drive of the band conveyor device 6 so that the band loop lies tightly against the object 7. The tensioning device 8 is now activated, so that the tape loop is pulled around the object 7 with a predetermined high tensioning force.
  • the belt conveyor device 6 and the tensioning device 8 together form the belt drive. They can also be combined to form a drive device.
  • the tensioned loop is then cut off from the supply of tape.
  • the beginning of the loop is connected to the end of the loop by means of a fastening unit 10.
  • the closure unit 10 consists, for example, of a welding device which welds the two ends of the packaging tape loop formed to one another.
  • the closure unit 10 welds the film-like plastic material from which the strapping 2 is made.
  • the conveyor with which the article 7 is transported into and out of the strapping zone within the tape guide frame 9 is shown in FIG Figure 1 not shown.
  • FIG Figure 1 only an outer protective frame of the tape guide frame 9 can be seen. Inside the outer protective frame there is a support frame 11 on which the elements of the tape guide frame 9 with the tape channel as well as closing devices for the tape channel and ejector 17 are arranged.
  • a support frame 11 according to the present invention is shown in FIG Figure 2 shown in front view. It is made from sheet steel by folding and laser cutting. Such a steel sheet typically has a thickness of 3 to 6 mm.
  • Corner elements 12 and straight elements 13 are attached to the support frame 11. An enlarged view of the corner element 12 and the end portions of two straight elements 13 connected thereto is shown in FIG Figure 3 shown.
  • the corner element 12 has a curved section 14 of the belt channel.
  • Each straight element 13 has a straight section 15 of the belt channel.
  • the front ends of the curved sections 14 and straight sections 15 of the belt guide channel in the belt conveying direction each have a funnel-shaped enlargement 16. This funnel-shaped widening 16 facilitates the entry of the belt conveyed through the belt channel at high speed into the next section 14, 15 of the belt channel.
  • an ejector 17 designed as a long, pivotable arm, with which the strapping tape can be ejected from the curved section 14 of the tape channel.
  • the Figure 4 shows the rear of the support frame 11.
  • the support frame 11 has several mounting openings 18 with which the support frame 11 can be attached to the outer protective frame.
  • only two of the mounting openings 18 are provided with a reference number.
  • FIG. 11 shows a sectional view along the section line VV in FIG Figure 4 . It can be seen that the sheet metal of the support frame 11 is folded over and has a horizontal leg 20 which stiffens the support frame 11. Details from the Figures 4 and 5 are in the Figures 6 to 8 shown enlarged.
  • the Figure 6 14 shows a sectional view of the fastening clip 19.
  • the fastening clip 19 fastens a straight element 13 with a straight section 15 of the tape guide channel to the support frame 11.
  • the support frame 11 has an opening 21 through which the fastening clip 19 protrudes.
  • the fastening clip 19 consists of an essentially U-shaped bent sheet metal strip. It has a back section 22 to which two parallel legs 23, 24 are connected.
  • the leg 23 of the fastening clip 19 protrudes through the opening 21 of the Support frame 11 and has at its end an angled holding projection 25 which engages behind the edge of a groove 26 in a first side surface 27 of the straight element 13.
  • the second leg 24 of the fastening clip 19 has a resilient holding projection 28 which engages behind an edge of a groove 29 in the second side surface 30 of the straight element 13.
  • the back section 22 of the fastening clip is arched so that it draws the straight element 13 of the tape guide frame 9 elastically towards the support frame 11.
  • the curvature of the back section 22 extends convexly in the direction of the two legs 23, 24.
  • the curved back section 22 rests against the section of the support frame 11 next to the opening 21.
  • the arched back section 22 is bent open slightly so that after locking it presses the section of the support frame 11 and the straight element 13 against one another with an elastic tension force .
  • the straight element 13 can be made from an extruded profile made of plastic or light metal, which has essentially the same profile cross-section over its length. On the mutually parallel side surfaces 27, 30, it has grooves 26, 29 which can be used to interact with the fastening clips 19 at any location. Furthermore, the profile of the straight element 13 has a straight section 15 of the tape guide channel.
  • the Figure 9 shows schematically the fastening of the corner element 12 in a corner of the support frame 11.
  • the sheet metal of the support frame 11 has a holding opening 31 which is penetrated by a hook-shaped holding projection 32 of the corner element 20, the hook-shaped holding projection 32 the edge of the holding opening 31 engages behind.
  • corner element 12 is fixed by a fastening screw 33 which is screwed into an internal thread in the sheet metal material of the support frame 11.
  • the corner element 12 is securely attached to the support frame 11 by this simple method of fastening.
  • FIGS 10 to 12 show an alternative construction of the support frame 11 '.
  • the opening 21 ' which is penetrated by a leg 23 of the fastening clip 19, is arranged in the horizontal leg 20' of the support frame 11 '.
  • the straight element 13 is pulled by the fastening clip 19 not only against the back of the support frame 11 ', but also against its horizontal leg 20' and is thereby additionally stabilized.
  • the Figure 13 shows a three-dimensional representation of the profile of the straight element 13.
  • the straight section 15 of the tape guide channel with the funnel-shaped enlargement 16 at one end can be seen.
  • the grooves 26, 29 can be seen in two opposite, parallel side surfaces 27, 30 of the straight element 13, by means of which the straight element 13 can be fixed at any point by a fastening clip 19 on the support frame 11.
  • the straight element 13 can be cut to the required length and fastened to the support frame 11, 11 ′ between two corner elements 12 with the fastening clips 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
EP20198453.1A 2019-09-30 2020-09-25 Moyen de fixation pour le canal à bande d'une machine à cercler Active EP3798145B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019126380 2019-09-30
DE102020118163.9A DE102020118163A1 (de) 2019-09-30 2020-07-09 Befestigungsmittel für Bandkanal einer Umreifungsmaschine

Publications (2)

Publication Number Publication Date
EP3798145A1 true EP3798145A1 (fr) 2021-03-31
EP3798145B1 EP3798145B1 (fr) 2022-01-19

Family

ID=72659669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20198453.1A Active EP3798145B1 (fr) 2019-09-30 2020-09-25 Moyen de fixation pour le canal à bande d'une machine à cercler

Country Status (2)

Country Link
EP (1) EP3798145B1 (fr)
ES (1) ES2908869T3 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572237A (en) 1967-11-22 1971-03-23 Ikegai Iron Works Ltd Strap guide yoke for an automatic strapping machine
JPS49146087U (fr) 1973-04-20 1974-12-17
JPS5357088U (fr) 1976-10-19 1978-05-16
EP0141898A1 (fr) * 1983-05-11 1985-05-22 Signode Corporation Canal de guidage de feuillard pour machine à cercler automatique
EP0223988A1 (fr) 1985-11-06 1987-06-03 Strapex AG Dispositif de cerclage d'un objet avec une bande
DE3814029A1 (de) * 1987-05-02 1988-11-17 Hoesch Ag Bandfuehrungsvorrichtung einer umreifungseinrichtung
JP2000203514A (ja) 1996-08-30 2000-07-25 Saichi Matsubara 梱包機におけるバンド懸回操作機構
WO2008019991A1 (fr) 2006-08-15 2008-02-21 Maschinenfabrik Gerd Mosca Ag Machine de cerclage par bande

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572237A (en) 1967-11-22 1971-03-23 Ikegai Iron Works Ltd Strap guide yoke for an automatic strapping machine
JPS49146087U (fr) 1973-04-20 1974-12-17
JPS5357088U (fr) 1976-10-19 1978-05-16
EP0141898A1 (fr) * 1983-05-11 1985-05-22 Signode Corporation Canal de guidage de feuillard pour machine à cercler automatique
EP0223988A1 (fr) 1985-11-06 1987-06-03 Strapex AG Dispositif de cerclage d'un objet avec une bande
EP0223988B1 (fr) 1985-11-06 1988-12-28 Strapex AG Dispositif de cerclage d'un objet avec une bande
DE3814029A1 (de) * 1987-05-02 1988-11-17 Hoesch Ag Bandfuehrungsvorrichtung einer umreifungseinrichtung
JP2000203514A (ja) 1996-08-30 2000-07-25 Saichi Matsubara 梱包機におけるバンド懸回操作機構
WO2008019991A1 (fr) 2006-08-15 2008-02-21 Maschinenfabrik Gerd Mosca Ag Machine de cerclage par bande

Also Published As

Publication number Publication date
EP3798145B1 (fr) 2022-01-19
ES2908869T3 (es) 2022-05-04

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