EP2794400A1 - Appareil de cerclage pneumatique - Google Patents

Appareil de cerclage pneumatique

Info

Publication number
EP2794400A1
EP2794400A1 EP12812860.0A EP12812860A EP2794400A1 EP 2794400 A1 EP2794400 A1 EP 2794400A1 EP 12812860 A EP12812860 A EP 12812860A EP 2794400 A1 EP2794400 A1 EP 2794400A1
Authority
EP
European Patent Office
Prior art keywords
motor
strapping
pneumatic motor
driven
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.)
Granted
Application number
EP12812860.0A
Other languages
German (de)
English (en)
Other versions
EP2794400B1 (fr
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/fr
Application granted granted Critical
Publication of EP2794400B1 publication Critical patent/EP2794400B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65B13/18Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/185Details of tools
    • B65B13/187Motor means
    • B65B13/188Motor means pneumatic or hydraulic
    • 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
    • B65B13/025Hand-held tools
    • 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
    • B65B13/18Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24Securing ends of binding material
    • B65B13/32Securing ends of binding material by welding, soldering, or heat-sealing; by applying adhesive
    • B65B13/322Friction 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.
  • Said plastic band is first placed in a loop around a package, wherein a first, free end forms a lower band at a weld.
  • the other end of the plastic strap loop is guided as a top band together with the lower belt at a connection point by the welding device and then extends to the tensioning device.
  • a friction wheel or a similar element is provided, which is driven by a motor. This frictional wheel, driven by a motor, grips the upper belt and thus tightens the loop around the package.
  • CONFIRMATION SKOPJE and a short period of cooling are then welded together at the juncture upper band and lower band.
  • the upper band is cut off next to the connection point.
  • the strapping device can then be removed from the tape wrapped with the plastic package.
  • strapping tools are used in many different places and because of different packages also in different positions, they are often manually handled and moved, for example, to their most diverse places of use. 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 invention has the advantage that only one motor is used, although several motor-driven assemblies are present in the strapping device. So motor drives can be saved, which means both a weight advantage. In addition, cost savings could be achieved by saving on expensive pneumatic motors.
  • the pneumatic motor is reversible in its drive direction and is doing Alternatively brought about in opposite directions releasing freewheels in operative connection with the tensioning or welding device.
  • a design in this way has the advantage that it is very safe to operate. 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.
  • mount the freewheeling in opposite directions of rotation on the same side of the pneumatic motor on the motor shaft. Then, the torque would have to be passed through the motor shaft over a longer distance when the engine power decreases over the freewheel spaced further from the pneumatic motor. Since each shaft is provided with a certain torsional elasticity, this could possibly also result in the switching from one direction of rotation to the other undesirable effects.
  • the shaft would then have to be dimensioned larger, which would counteract the goal of the lightest possible device.
  • the alternative connection of the pneumatic motor to the tensioning device or to the welding device is accomplished by reversing its direction of travel. In order to run the pneumatic motor in opposite directions, he has in particular two alternatively to be acted upon with compressed air supply air ducts.
  • 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 normally supplied to the central outlet via corresponding channels and valves which release these channels.
  • changeover valves that vent automatically to the outside are automatically integrated into the supply air ducts for the switchable pneumatic motor which are to be acted upon by compressed air.
  • These 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.
  • 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.
  • a switching diaphragm which is essentially M-shaped in cross-section is present in the reversing valves, which can be switched between a release position for the supply air duct and a release position for the outlet opening of the reversing valve to the surroundings, depending on its inflow direction.
  • Figure 1 shows the working head of a pneumatically operated
  • Figure 2 is a side view of a pneumatic drive motor for a working head of Figure 1;
  • Figure 3 is a sectional view along the line A-A in Figure 2;
  • FIG. 4 shows a sectional view along the line BB in FIG. 2 and FIG. 5 shows a sectional view along the line CC in FIG. 2.
  • Figure 1 shows the perspective view of the working head of a pneumatically operated strapping device. At this working head, a handle 2 is mounted, over which the strapping device is traded. Below this handle is an operating lever 3, via which together with the operation of push buttons 4, the pneumatic strapping device is controlled.
  • the plastic band is then pulled tightly over a motor-driven friction wheel, so that it lies tightly around the package.
  • 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 normally completely covers the bevel gear 7 and the pneumatic motor 8, 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. 2 also shows the toothed wheel 10 which is also seated on the pneumatic motor 8.
  • FIG. 3 which shows a section across the pneumatic motor 8 along the line A-A in FIG. 2, it can be seen that the motor shaft 12 of the pneumatic motor 8 ends in shaft ends 13, 14 on both sides of the pneumatic motor. 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. These two sleeve freewheels 16, 17 release the torque transmission in opposite directions of rotation, so that either the bevel gear 15 or the gearwheel 10 is rotated during rotation of the pneumatic motor 18 or its motor shaft 12. The other wheel is decoupled via the intermediate sleeve freewheels and accordingly not driven.
  • compressed air is supplied to it via a supply air connection 18.
  • This flows past a reversing valve 19 (described in more detail below) through a supply air duct 20 to the rotor 21 of the pneumatic motor 8.
  • the rotor 21 sets this compressed air into rotation and then flows out of the pneumatic motor 8 via a central outlet 22.
  • the empty air generated by the rotor 21 during its rotation takes the course shown in FIG. 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 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 shown in Figure 5, supply air in the radially outer region of the switching valve 19 and 24 can flow past them to the supply air duct 20 and 23 or, as shown in Figure 4, that impinging air discharged therefrom from the pneumatic motor can displace the diaphragms for sealing the supply air connections and simultaneous release of the duct sections to the outlet openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

L'invention concerne un appareil de cerclage à commande pneumatique pour cercler un paquet au moyen d'une bande de plastique placée autour du paquet, lequel appareil comprend un dispositif tendeur entraîné par moteur et un dispositif de soudage entraîné par moteur pour la bande de plastique. Cet appareil se caractérise en ce que le dispositif tendeur et le dispositif de soudage sont entraînés par le même moteur pneumatique (8). Le sens de rotation du moteur pneumatique peut être inversé et le moteur pneumatique peut être relié aux dispositifs par l'intermédiaire de deux roues libres assurant une rotation libre dans des sens opposés. Pour limiter la puissance nécessaire à l'évacuation de l'air de vide, dans un mode de réalisation particulièrement préféré, il est prévu d'intégrer dans les canaux d'amenée d'air, qui servent de canaux d'évacuation de l'air de vide lors de l'inversion du sens de marche, des soupapes d'inversion qui évacuent automatiquement l'air de vide vers l'extérieur.
EP12812860.0A 2011-12-23 2012-12-20 Appareil de cerclage pneumatique Active EP2794400B1 (fr)

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 (fr) 2011-12-23 2012-12-20 Appareil de cerclage pneumatique

Publications (2)

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

Family

ID=47522457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12812860.0A Active EP2794400B1 (fr) 2011-12-23 2012-12-20 Appareil de cerclage pneumatique

Country Status (9)

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

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 (fr) * 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 (fr) * 1992-03-10 1999-02-17 Signode Corporation Dispositif de liage à main
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013091869A1 *

Also Published As

Publication number Publication date
CN104093635A (zh) 2014-10-08
BR112014014798A2 (pt) 2017-06-13
KR20140125349A (ko) 2014-10-28
EP2794400B1 (fr) 2015-11-25
US20140290192A1 (en) 2014-10-02
DE102011122155A1 (de) 2013-06-27
CA2860355A1 (fr) 2013-06-27
BR112014014798B1 (pt) 2020-09-08
CA2860355C (fr) 2019-06-04
HK1202102A1 (en) 2015-09-18
WO2013091869A1 (fr) 2013-06-27
US9630730B2 (en) 2017-04-25
CN104093635B (zh) 2016-08-24
KR102022133B1 (ko) 2019-09-17

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