EP2794400B1 - Pneumatisches umreifungsgerät - Google Patents

Pneumatisches umreifungsgerät Download PDF

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Publication number
EP2794400B1
EP2794400B1 EP12812860.0A EP12812860A EP2794400B1 EP 2794400 B1 EP2794400 B1 EP 2794400B1 EP 12812860 A EP12812860 A EP 12812860A EP 2794400 B1 EP2794400 B1 EP 2794400B1
Authority
EP
European Patent Office
Prior art keywords
pneumatic motor
motor
strapping
strapping apparatus
pneumatic
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.)
Active
Application number
EP12812860.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2794400A1 (de
Inventor
Klaus LEPPERT
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.)
Fromm Holding AG
Original Assignee
Fromm Holding AG
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 Fromm Holding AG filed Critical Fromm Holding AG
Publication of EP2794400A1 publication Critical patent/EP2794400A1/de
Application granted granted Critical
Publication of EP2794400B1 publication Critical patent/EP2794400B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/185—Details of tools
    • B65B13/187—Motor means
    • B65B13/188—Motor means pneumatic or hydraulic
    • 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
    • B65B13/00—Bundling articles
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/025—Hand-held tools
    • 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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24—Securing ends of binding material
    • B65B13/32—Securing ends of binding material by welding, soldering, or heat-sealing; by applying adhesive
    • B65B13/322—Friction welding

Definitions

  • the invention relates to a pneumatically operated strapping device for strapping a package with a plastic band wound around it, with a motor-driven clamping device and a motor-driven welding device for the plastic band, according to the preamble of the accompanying main claim.
  • the plastic tape is then tightly wrapped around the package, it is compressed in this condition at the point where it passes through the welding apparatus.
  • a vibrating plate is then lowered as part of the welding device on the clamped bands and put into vibration.
  • the vibration is generated by an engine via a gearbox. Due to this vibration occurs between upper and lower belt to a relative movement, which due to the resulting friction to a local melting of the thermoweldable Plastic band leads. After completion of the vibration movement and a short period of cooling then the upper and lower band are welded together at the junction.
  • the upper band is cut off next to the connection point.
  • the strapping device can then be removed from the wrapped with the plastic strap package.
  • strapping tools are used at various points and due to different packages in a variety of positions, they are often manually handled and moved, for example, to their various locations. From this point of view it is important that the device causes the least possible physical strain for an operator.
  • An object of the present invention is therefore to make a strapping device of the type mentioned as easy as possible.
  • the tensioning device and the welding device which are provided on the strapping device, are driven by one and the same pneumatic motor.
  • This compressed air is discharged after its relaxation in the rotor of the pneumatic motor, which leads to its rotation, in a known manner through the central outlet into the environment.
  • empty air is understood to mean the air that is compressed in the cells of the rotor during rotation of the reversible pneumatic motor, which air is used during the rotation in the opposite direction to the expansion of the compressed air.
  • This empty air is the central outlet thereby normally via corresponding channels and valves that enable these channels, fed.
  • valves are to be provided integrated fairly close to the rotor of the pneumatic motor, in particular as in the flow direction of the incoming compressed air last component in front of the rotor.
  • switching the pneumatic motor in the other direction of rotation of the just used for the supply air channel acts as an exhaust duct. Through this flows then the empty air of the engine and reaches the first the changeover valve. Up to this switching valve so only a short channel length must be overcome by the empty air, which significantly reduces a friction loss and thus the power requirement for the expulsion of the empty air.
  • a corresponding pneumatic motor can thus be designed with less power and thus smaller and the weight of a corresponding pneumatic strapping device is accordingly further reduced.
  • substantially M-shaped switching membrane present is in the changeover valves in cross-section substantially M-shaped switching membrane present, which is switchable depending on their direction of flow between a release position for the supply air duct and a release position for the outlet opening of the changeover valve to the environment.
  • the reversible in its drive direction pneumatic motor is brought into opposite directions releasing freewheels with the tensioning or welding device in operative connection.
  • a construction in this way has the advantage that it is very reliable. With her it is ensured that either the clamping or the welding device are driven, but not both devices simultaneously. This alternative drive can be realized without complex control, which would have both weight and cost disadvantages.
  • the pneumatic motor has a motor shaft projecting at both its ends, which is connected at each of its ends projecting from the motor to one of the freewheels which open in opposite directions.
  • the motor shaft only has to transmit torsional moments over short distances. It can thus be made smaller and is therefore also lighter.
  • the shaft would then have to be dimensioned larger, which would counteract the goal of the lightest possible device.
  • FIG. 1 recognizes the perspective view of the working head of a pneumatically operated strapping device.
  • a handle 2 On this working head a handle 2 is mounted, over which the strapping device is handled.
  • an operating lever 3 Below this handle is an operating lever 3, via which together with the operation of push buttons 4, the pneumatic strapping device is controlled.
  • a plastic strap is inserted through one on the in FIG. 1 opposite side lying slot 6 passed. Then the plastic tape is placed around a package to be frosted and again passed through the slot 6. The plastic tape is thus wrapped around the package in a loop.
  • the plastic band is then pulled tightly over a motor-driven friction wheel, so that it lies tightly around the package.
  • the plastic tape is then compressed at a position within the strapping device, where it overlaps after formation of the loop, to form a joint.
  • a vibrating plate is then lowered onto the clamped bands and this vibrating plate is vibrated by a motor. Due to this vibration, a relative movement occurs at the connection point between the two overlapping strip sections and, due to the resulting friction, a local melting of the thermo-weldable plastic strip.
  • this welded connection point can then cool, so that a firm weld is formed and the strapping device can be removed from the packaging tape, wherein the packing belt slides out of the slot 6.
  • the above-mentioned friction wheel is driven by a bevel gear 7 by a pneumatic motor 8.
  • a housing 9 is shown, which covers the bevel gear 7 and the pneumatic motor 8 normally completely, but here broken up for better visibility and partially omitted.
  • end of the pneumatic motor 8 carries another gear 10, via which it is to be connected in a known manner with the vibration drive for the welding or vibration plate.
  • the motor is mounted on a base plate 11 for ease of assembly. Their easy interchangeability also facilitates the assembly and subsequent maintenance of the strapping device.
  • FIG. 3 which makes a section across the pneumatic motor 8 along the line AA in FIG. 2 represents, it can be seen that the motor shaft 12 of the pneumatic motor 8 ends at the two sides of the pneumatic motor in shaft ends 13, 14. On these shaft ends 13, 14 sits on the one hand a bevel gear 15, which is part of the bevel gear 7. At the opposite end, the motor shaft 12 carries the above-mentioned gear 10th
  • Both the gear 10 and the bevel gear 15 are not sitting directly on the shaft ends 13, 14 but here sleeve freewheels 16, 17 interposed.
  • the idle air generated by the rotor 21 during its rotation takes the in FIG. 4 illustrated course. It flows through a channel 23 to a further switching valve 24 and is discharged at this directly by an opening provided at it outlet opening 25 to the environment.
  • the empty air of the pneumatic motor 8 must therefore not be guided through possibly narrow channels only to the central outlet 22.
  • the pneumatic motor 8 is driven in the opposite direction, it is via another supply air connection 26, the in FIG. 4 is shown, compressed air supplied.
  • the switching valve 24 closes with its diaphragm 27, the outlet opening 25 and the compressed air then flows through the channel 23 as a supply air channel to the rotor 21. This is in the opposite Direction rotated and the driving him compressed air then flows through the central outlet 22 into the environment.
  • the idle air generated by the rotor 21 flows through the in FIG. 5 there to be recognized channel 20 to the changeover valve 12.
  • the substantially M-shaped membrane 28 is pressed in front of the supply air port 18 so that the empty air flows through the switching valve 19 through an outlet opening 29 provided at this, where they are discharged to the environment is again, without previously by narrow channels, if necessary, yet to have been passed to the central outlet 22.
  • the essentially M-shaped membranes 27, 28 in their cross-section may each alternatively close the supply air connections 18 or 26 or the channel sections which lead in the valves 19 and 24 to the outlet openings 29 and 25, respectively.
  • they allow, with their radially outer sealing lips, that, as in FIG. 5 shown, supply air in the radially outer region of the switching valve 19 and 24 can flow past them to the supply air duct 20 or 23 or, as in FIG. 4 illustrated that the impinging air flowing from the pneumatic motor impinging on them empty the membranes to seal the supply air connections and simultaneous release of the channel sections to the outlet openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
EP12812860.0A 2011-12-23 2012-12-20 Pneumatisches umreifungsgerät Active EP2794400B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011122155A DE102011122155A1 (de) 2011-12-23 2011-12-23 Pneumatisches Umreifungsgerät
PCT/EP2012/005293 WO2013091869A1 (de) 2011-12-23 2012-12-20 Pneumatisches umreifungsgerät

Publications (2)

Publication Number Publication Date
EP2794400A1 EP2794400A1 (de) 2014-10-29
EP2794400B1 true EP2794400B1 (de) 2015-11-25

Family

ID=47522457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12812860.0A Active EP2794400B1 (de) 2011-12-23 2012-12-20 Pneumatisches umreifungsgerät

Country Status (9)

Country Link
US (1) US9630730B2 (pt)
EP (1) EP2794400B1 (pt)
KR (1) KR102022133B1 (pt)
CN (1) CN104093635B (pt)
BR (1) BR112014014798B1 (pt)
CA (1) CA2860355C (pt)
DE (1) DE102011122155A1 (pt)
HK (1) HK1202102A1 (pt)
WO (1) WO2013091869A1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014011929A1 (de) * 2014-08-14 2016-02-18 Fromm Holding Ag Antriebseinheit für ein Umreifungsgerät
CH712984A2 (de) * 2016-09-18 2018-03-29 Signode Ind Group Llc Umreifungsvorrichtung zur Umreifung von Packgut mit einem Umreifungsband.
US11352153B2 (en) 2019-05-07 2022-06-07 Signode Industrial Group Llc Strapping tool

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1054034A (pt) * 1900-01-01
DE1906457U (de) * 1963-08-14 1964-12-10 Seal Less Strapping Ltd Of Ger Geraet zum verschnueren von paketen.
US3544029A (en) * 1968-10-07 1970-12-01 Signode Corp Power-driven dispenser assembly
US3648739A (en) * 1970-04-01 1972-03-14 Signode Corp Strap clamping and severing assembly for strapping tools
US3654033A (en) * 1970-04-01 1972-04-04 Signode Corp Strap tensioning and sealing tool
US4313779A (en) * 1979-07-30 1982-02-02 Signode Corporation All electric friction fusion strapping tool
EP0560082B2 (en) * 1992-03-10 1999-02-17 Signode Corporation Hand strapping tool
US5954899A (en) * 1998-04-03 1999-09-21 Illinois Tool Works Inc. Strap welding tool with base plate for reducing strap column strength and method therefor
US6192781B1 (en) * 1998-12-31 2001-02-27 Cooper Technologies Company Assembly for reversing a fluid driven motor
US6907717B2 (en) * 2002-06-14 2005-06-21 Illinois Tool Works, Inc. Dual motor strapper
US6966255B1 (en) * 2004-08-06 2005-11-22 Illinois Tool Works, Inc. Lock-out for power assisted strapping tool
US7811070B2 (en) * 2005-06-09 2010-10-12 Atlas Copco Tools Ab Pneumatic vane motor with by-pass means
US9284080B2 (en) * 2008-04-23 2016-03-15 Signode Industrial Group Llc Mobile strappiing device
US9315283B2 (en) * 2008-04-23 2016-04-19 Signode Industrial Group Llc Strapping device with an energy storage means
NZ601637A (en) * 2010-05-14 2013-12-20 Joe Santa & Ass Pty Ltd An air motor
US8967217B2 (en) * 2011-02-22 2015-03-03 Signode Industrial Group Llc Hand-held strapper

Also Published As

Publication number Publication date
CN104093635A (zh) 2014-10-08
BR112014014798A2 (pt) 2017-06-13
KR20140125349A (ko) 2014-10-28
EP2794400A1 (de) 2014-10-29
US20140290192A1 (en) 2014-10-02
DE102011122155A1 (de) 2013-06-27
CA2860355A1 (en) 2013-06-27
BR112014014798B1 (pt) 2020-09-08
CA2860355C (en) 2019-06-04
HK1202102A1 (en) 2015-09-18
WO2013091869A1 (de) 2013-06-27
US9630730B2 (en) 2017-04-25
CN104093635B (zh) 2016-08-24
KR102022133B1 (ko) 2019-09-17

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