EP1296873B1 - Procede et appareil de torsadage et de serrage d'un fil - Google Patents

Procede et appareil de torsadage et de serrage d'un fil Download PDF

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Publication number
EP1296873B1
EP1296873B1 EP01938010A EP01938010A EP1296873B1 EP 1296873 B1 EP1296873 B1 EP 1296873B1 EP 01938010 A EP01938010 A EP 01938010A EP 01938010 A EP01938010 A EP 01938010A EP 1296873 B1 EP1296873 B1 EP 1296873B1
Authority
EP
European Patent Office
Prior art keywords
wire
objects
twisting
twisting member
jaws
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
EP01938010A
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German (de)
English (en)
Other versions
EP1296873A1 (fr
Inventor
Kim Michael Jensen
Per Bang Jensen
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JBJ Mechatronic ApS
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JBJ Mechatronic ApS
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Filing date
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Application filed by JBJ Mechatronic ApS filed Critical JBJ Mechatronic ApS
Publication of EP1296873A1 publication Critical patent/EP1296873A1/fr
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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
    • B65B13/24—Securing ends of binding material
    • B65B13/28—Securing ends of binding material by twisting
    • B65B13/285—Hand tools
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/122—Machines for joining reinforcing bars
    • E04G21/123—Wire twisting tools

Definitions

  • the present invention relates to a method and an apparatus for binding objects such as iron bars for reinforced concrete or for binding branches on trees or for binding any items together e.g. for the purpose of packing or securing items. More specifically the invention relates to an improved method and an apparatus for twisting and tightening a wire, the method and apparatus enabling a tighter and stronger binding to be performed even by means of a portable device and with the use of less binding wire.
  • Binding reinforcement bars in concrete constructions is known to be a costly operation.
  • a wire is curled around the iron bars, and by means of a wire cutter the free ends of the wire are twisted.
  • Resent considerations not only related to the costs of binding the bars but also related to the working environment, has lead to the development of hand-held, portable devices for binding.
  • EP 0751270 shows a device for binding reinforcement bars for concrete constructions.
  • the device operates by twisting a wire in a loop by a guide arm. A hook thereby binds the reinforcement bars together by twisting the wire loop.
  • US 4,252,157 upon which the preamble of claim 2 is based, shows a device for binding reinforcement bars, comprising a differential gear for transferring torque from a motor to a binding head and a cutting device, respectively.
  • binders having jaws encircling the objects and which are adapted to guide a binding wire in a wire loop around the objects to be tied together.
  • the binders further have twisting means for twisting the wire loop so as to tighten the wire loop around the objects and thus to tighten the objects together.
  • the existing binders generally have circular jaws for guiding the wire in circular loops. This is in contrast to the cross-sectional shape of the objects to be tied together, which objects typically form an oval shape, e.g. when binding two circular iron rods for reinforcing concrete constructions.
  • the result of the circular-shaped jaws is typically an excessive overuse of binding wire.
  • the existing binders further have twisting means arranged to twist the wire loop by gripping the wire loop, e.g. with a rotating hook without previous tightening of the wire in the wire loop.
  • twisting means arranged to twist the wire loop by gripping the wire loop, e.g. with a rotating hook without previous tightening of the wire in the wire loop.
  • a first aspect of the present invention relates to a method for twisting and tightening a wire with a free end portion around at least two objects for binding the objects together, in accordance with claim 1.
  • free end portion of a wire refers to a coil of wire, from which coil the free end of wire is transferred through the machine and around the objects to be tied together.
  • the machine could use pre-cut wire strips, and the free end of wire is in this case just one of the wire ends.
  • the surface of the twisting member could be the surface of a disc with two guiding holes, the disc being rotationally mounted to the front end of a binding machine.
  • the binding machine could be provided with guiding jaws to guide the wire from one of the holes around the object to be tied and back through the other hole.
  • a feature of the present invention is that the wire forms a closed loop, so that the surface of the twisting member is between the intersection of the wire and the object.
  • the tightening force will be provided already by the first rotation of the twisting member and it is easy to achieve a satisfactory binding force. Selection of a suitable distance between the points where the wire enters and exits the wire loop through the surface of the twisting member is an important issue.
  • a distance between the holes in the surface of at least 2 mm such as between 2 mm and 10 mm or between 2 mm and 6 mm will provide a significantly improved tightening of the wire without stressing the wire too much.
  • the present invention relates to a method wherein the wire has one end connected to a wire source and wherein the wire is being cut prior to the twisting.
  • the wire source could be a coil of wire and the cutting of the wire could preferably be done after tightening the wire. That results in less wire consumption and compared to using pre-cut wire strips, a better way of binding, in that the strip will have exactly the right length - not too long and not too short.
  • the tightening of the wire prior to the cutting and twisting further minimises the excess use of wire.
  • the cutting sequence can preferably be executed as part of the twisting sequence, e.g. by cutting the wire between the disc with the fixation holes and a cutting edge. When the disc starts to rotate the wire is cut and twisted simultaneously. It should though be clear that the cutting of the wire may also be performed either before and/or after the twisting of the wire.
  • the present invention relates to an apparatus for twisting and tightening a wire around two objects in accordance with claim 2.
  • the apparatus is provided with a twisting member having at least one cutting edge which is adapted to cut the wire as the twisting member is being rotated.
  • the first hole and the second hole in the twisting member could be adapted to guide the wire to and from the jaws.
  • the holes should be provided as through going holes from the rear side of the twisting member to the surface facing the objects.
  • the holes should preferably be provided with a mutual distance of 2-10 mm such as 2-6 mm when measured on the surface facing the object.
  • the holes are non-parallely provided though the twisting member, so that the first hole and the second hole cross each other at a certain distance inside the twisting member, whereby the free end of the wire is forced to cross or even intersect the other part of the wire at a certain distance as the free end is guided through the second hole.
  • the twisting member is detachably mounted to the binder as will be described in further detail later. The user of the binder may then select a twisting member having a distance between the first and the second hole which matches a specific need for tightening force, or the user may change the twisting member when the cutting edge needs replacement.
  • the two jaws adapted to encircle the two objects are being arranged opposite each other and facing each other in a loop-shaped configuration. Since an often occurring situation is to have two reinforcement bars which are to be tied together, it is an important aspect of the present invention to provide the jaws in a non-circular, e.g. polar-circular configuration.
  • a polar-circular shape of the jaws will provide a close contact between the jaws and two reinforcement bars so that an optimally short length of the wire around two reinforcement bars may be achieved. It will be preferred that the jaws of the binder may easily be replaced so that the user may select jaws having a size which fits a specific task or which fits specific sizes of the reinforcement bars.
  • the jaws should be provided with groves guiding the wire in the loop.
  • the groves should be open in a radially inward direction, so that the wire, after having been guided around the objects, can be tied together around the objects without being bound to the jaws.
  • a wire having a modulus of elasticity of at least 50,000 MPa, such as in the range of 80,000- 160,000 MPa. or in the range of 90,000-150,000 MPa. will provide sufficient elasticity for the functioning of the jaws.
  • the wire can be provided coiled on wire coils comprising enough wire for several hundred bindings.
  • Elastic wire having been coiled in a circular wire coil will typically seek back to a curved shape when released from the coil. If the wire is provided in wire coils, it will therefore be preferred to mount the coil and to guide the wire in an arrangement which supports the wire in being guided by the groves of the jaws. This is shown in Fig. 25 wherein the wire is guided so that the curved shape of the wire will support that the wire follows the grove even though the grove is open in a radially inward direction.
  • the rotation of the twisting member and the cutting edge could preferably be activated by means of an electrically driven motor.
  • the feeding of the wire e.g. from a coil of wire or from a cassette or magazine containing pre-cut wire strips, could be activated by means of an electrically driven motor.
  • the apparatus is adapted for portable use, e.g. in a construction site without power outlets. It is therefore an object to adapt motors that can be operated via a battery, such as the lithium batteries already known for power tools.
  • the apparatus may further have a transformer for transformation e.g. of a 220 voltage or a 110 voltage electric current into a low voltage electric current to be used in the electrically driven motor or motors. In that way the apparatus can be operated without a battery, if power outlets are present on the construction site.
  • a transformer for transformation e.g. of a 220 voltage or a 110 voltage electric current into a low voltage electric current to be used in the electrically driven motor or motors.
  • either the means for feeding the wire or the means for twisting the twisting member may be driven pneumatically by pneumatically driven motors such as the motors known from pneumatic drills, sanders etc.
  • the pneumatically driven apparatus could preferably be provided with a gas container for driving the pneumatically driven means.
  • either the means for feeding the wire or the means for twisting the twisting member may be driven hydraulically driven by hydraulically driven motors such as the motors known from hydraulic heavy duty power tools etc.
  • the motors used for feeding the wire and for rotating the twisting member could also be any combination between electrically, pneumatically or hydraulically driven motors.
  • the motor may be the same motor adapted both for feeding the wire and for rotating the twisting member, e.g. by application of a transmission with one rotational power inlet from the motor and with two rotational power outlets for the wire feeding mechanism and for the rotation of the twisting member.
  • the wire feeding mechanism may preferably be provided so that the wire in one operation is both straightened out and fed, e.g. by providing a set of three rotating wire feeding wheels, two being provided on one side of the wire and one on the other side of the wire.
  • the gripping means comprises an electromagnet.
  • the gripping means could also be operated pneumatically or hydraulically or by means of any mechanical or electromechanical means.
  • the operation of the first and/or the second electrically, pneumatically or hydraulically driven motor is controlled by a control system.
  • the control system could be adapted to control the speed of the wire feeding, the speed of the rotation of the twisting member, the force applied to the wire feeding mechanism, e.g. before an fault signal is indicated, e.g. in case a wire is jammed in the wire-feeding mechanism.
  • the control system could further be adapted to indicate the remaining length of the wire on the wire coil - e.g. by tracking the total duration of the wire feeding with a certain speed.
  • the control system may further be adapted to apply a pre-specified tightening force, e.g. by means of varying the rotational force applied to the twisting member.
  • the control system could also be adapted to indicate remaining power level, e.g. in a battery for electrically driven motors or in a container with pressurised gas for pneumatically driven motors.
  • control system operates with means for electronically processing such as a CPU or a PLC.
  • the control system could be comprised in a program for execution in the CPU, and the program could be stored, e.g. in an e-prompt or similar means for electronically storing programs.
  • a display for displaying information relevant for the user of the apparatus may be connected to the control system. Such information could relate to the previously mentioned targets of the control system, such as displaying to the user the remaining length of wire on the wire coil, the applied tightening pressure, etc.
  • a digital indication of the applied tightening pressure is of particular interest, e.g. to a nurseryman using the machine to bind plants, e.g. to posts, where some plants may be destroyed by a too high tightening pressure. It may also be of interest to an electrician or plumber who may use the binder for binding cables, pipes, fittings etc.
  • the control system could also be adapted to communicate with an extemal processor, e.g. a PC.
  • an extemal processor e.g. a PC.
  • data related to the binding performed by the apparatus could be uploaded to the PC and used, e.g. for quality assurance or for statistical purpose.
  • the date could relate to how many bindings one worker can perform per day, how much wire each binding requires, the average tightening force applied to each binding, number of faults etc.
  • the communication capabilities may also be used to program the apparatus by means of a programming interface to the PC.
  • the twisting member that faces the objects could preferably be made of a hardened steel alloy such as titanium alloys or similar metallic or ceramic materials. Since the member could easily get into contact with the objects during the rotation of the member it is important that it is made from a material resistant to wear and tear.
  • each of the free end portions of the jaws is formed so that funnel-shaped openings extend away from the contact between the free end portions of the two jaws.
  • the openings are used to guide the.wire through the jaws.
  • the jaws may preferably be spring-biased towards a closed position or could be opened and closed mechanically or electro-mechanically, e.g. by hydraulically, pheumatically or electrically driven means and controlled by a CPU or a PLC.
  • the invention relates to an apparatus wherein a carrying support arm can be attached to the housing of the apparatus for carrying the weight of the apparatus and to enable the apparatus to be used at a distance from the hands of the operator.
  • the carrying arm is practical, e.g. for overhead operation of the apparatus or for reaching objects in narrow spaces.
  • the arm may furthermore allow for a more ergonomically correct handling of the apparatus, e.g. by transferring the forces needed for carrying the apparatus to the shoulders and/or the back of the operator.
  • the apparatus is provided with a contact face for supporting the apparatus against the objects as the tightening means tightens the wire and thereby pulls the objects tight against the apparatus.
  • the contact face may preferably be provided on a non rotating part of the apparatus such as on the binder housing, e.g. encircling the twisting member.
  • the contact face will keep a distance between the rotating twisting member and the objects. This is highly advantageous since it reduces wear on the twisting member and since the rotating force thereby will not be transferred to the binding apparatus.
  • the contact face may alternatively be provided attached to the twisting member.
  • the contact face may be provided in a low frictional material such as nylon or TeflonTM.
  • the contact face should be interchangeably arranged so as to allow periodical replacement.
  • the contact face could be attached to the twisting member via bearing means allowing the contact face to stand still against the objects while the twisting member rotates.
  • the present invention relates to a method for twisting and tightening a resilient wire with a free end portion around at least two objects for binding the objects together using a device comprising two jaws adapted to encircle the two objects, the jaws being arranged opposite each other and facing each other in a loop-shaped configuration, each of the jaws having a surface facing the objects and a groove in said surface, the method comprising:
  • the resiliency of the wire provides a pressure of the wire against the jaws of the binder and thus enables a reliable functioning of the binder with non-circular jaws being open in a radially inward direction. It has been found that a wire which is so elastic that it seeks back to a specific shape when released may advantageously be used for the binding. A modulus of elasticity above 50,000 MPa. gives a desirable flexibility and thus the desired pressure against the jaws. As an example, a coiled wire may either straighten out when released from the coil or may seek into a curved shape when released from the coil. As the free end of the wire is guided through the hole in the twisting member and into the grove in the jaws, the flexibility of the wire will ensure that the wire follows the grove and that the wire thus encircles the objects.
  • the present invention relates to the use of a wire having a flexibility which enables the wire to stay in firm contact with the groves in the jaws of a binder during the binding of an object.
  • the wire may as an example be made from an iron alloy comprising in the range of 1.2-2.0 % manganese (Mg), 0.8-1.2 % silicon (Si) and 0.06-0.15 % carbon (C).
  • Mg manganese
  • Si 0.8-1.2 % silicon
  • C 0.06-0.15 % carbon
  • Such wires may be purchased on the market, e.g. from vendors of welding wire.
  • the present invention relates to an apparatus for twisting and tightening a wire around two objects, comprising:
  • An elasticity which is sufficient to press the wire against the guiding means of the jaws means that the wire will seek into a predetermined shape, e.g. into a linear shape or into a curved shape.
  • the binder 1 has a handle 2 with a switch 3 for actuating the binder.
  • the power pack 4 provides an electrical current for driving the binder.
  • the binder may be provided with other means of power such as pressurised gas, a hydraulic pressure or it may be driven electrically directly from the net.
  • the binder has a wire coil 5 for feeding the machine with wire.
  • the binder could be provided with a cassette with pre-cut wires.
  • the display 6 is adapted to show the status of the binder such as faults, battery level, number of cuts, remaining length of wire on the wire coil or number of remaining cuts as well as the adjustment of the binder such as the binding force.
  • the display 6 is connected to a control system not shown.
  • the control system could preferably be adapted to receive login indicia from the user of the binder, which indicia identify the user towards the control system.
  • the control system selects a pre-specified setting according to the identified user.
  • the pre-specified setting may relate e.g. to the binding force, the binding speed or it may relate to the functioning of the switch 3.
  • the switch 3 could be adapted for different modes. One mode could be that the binder binds upon activation of the switch. Another mode could be that the switch is activated once and that the binder then binds upon activation of the jaws or upon indication that the objects to be tied together are located between the jaws.
  • the switch may further comprise means for reversing the binder in case of faults. In one mode the reversing could be activated automatically upon detection of a fault. In another mode releasing the switch before the binding sequence is ended may activate the reversing.
  • the fault that may be detected automatically by the control system could as an example be detection of a too high resistance in the wire feeding mechanism, occurring if the wire is jammed or it could be if a binding sequence is initiated with insufficient remaining wire on the wire coil. In that case a switch 11 seen in Fig. 2 indicates a fault, and the control system responds according to the selected fault mode.
  • the binder has jaws 7 for catching the objects.
  • the front end of the jaws is provided with an inclination 8 guiding the objects through the opening between the jaws.
  • the jaws could preferably be pressed together by means of springs and opened by means of the force of the objects being pressed through the opening between the jaws.
  • the jaws could also be opened and closed, respectively by mechanical or electro-mechanical means such as hydraulic, pneumatic or electric actuators.
  • the polar head 9 has a combined wire guiding and wire twisting function to be described later.
  • the tightening adjustment mechanism 10 By means of the tightening adjustment mechanism 10, the user can adjust the tightening force.
  • the tightening force can be given in three ways. One is by fixing the wire and pulling the wire feeding mechanism rearward. One is by locking the wire with a tightening arm and by means of a tightening device pushing a spindle lock forward to lock the wire while a sliding platform with the wire feeding mechanism is pressed rearward. Finally the wire may be tightened by means of the twisting of the wire, which according to the present invention is effected by a polar head. The mentioned parts will later be described in detail.
  • binding motor 12 is connected to a binding gear 13.
  • the binding gear changes the driving ratio of the motor so that the binding mechanisms rotate with a speed adapted for the wire, such as between 100-1000 rpm.
  • the gear 13 is connected to the polar head 9 through a mechanism to be described later.
  • the binder housing 14 is shown in detail in Fig. 9 whereas the detailed mechanism of the housing is best seen in Figs. 3 and 5.
  • the electromagnet 15 activates the wire lock 26 through the pinion 19, the fish joint 22 and the pivotally connected arm 23.
  • the wire feeding pipe 16 feeds the wire from the wire coil to the polar head 9 and the jaws 7 through the wire feeding mechanism 20 comprising the wire feeding rolls 21 and further through the wire pipe 24 and the wire nozzle 25.
  • the wire feeding mechanism is of a type known, e.g. from welding machines, and it comprises means for adjustment of the gab between the wire feeding rolls so as to enable the use of wires of various diameters.
  • the wire feeding rolls 21 are rotated by means of a wire feeding motor 17 connected to a wire feeding gear 18.
  • the wire feeding rolls 21 could preferably be provided with projections like a gear or sprocket wheel. The projections will avoid that the wire slips between the rolls.
  • three wheels are provided so that the wire is both fed forward and straightened out in one operation by combining aligning means 59 and feeding means as shown in Fig. 17.
  • the numeral 27 indicates the centre line of rotation of the polar head 9 and numeral 28 indicates the intersection point wherein the wire intersects the centre line of rotation.
  • the tightening arm 29 is connected to axial tightening devices shown in Fig. 11 and best seen in the context in Fig. 5.
  • the axial tightening devices When the axial tightening devices are activated by rotation around the centre line 27, the tightening arm 29 tilts around the hinge 35 and thus presses the wire feeding mechanism 20 in a rearward direction along the centre line 27.
  • the wire feeding rolls 21 When the wire feeding rolls 21 are locked, this will effect a tightening of the wire.
  • the tightening adjustment mechanism 10 is connected to the adjustment pin 30 so that the adjustment pin 30 is displacing the wire spindle lock 36 upon rotation of the adjustment mechanism 10 around the centre line 27.
  • the movement of the pin 30 in the slot 37 effects the displacement.
  • the pin 30 is attached to the movable bearing pedestal 38 which presses the spring 39 against the wire spindle lock 36.
  • the opto-house 31 is attached to the binding housing 14.
  • the opto-house comprises the axial tightening devices and is connected to the binding gear 13 so that the rotation of the binding gear is transferred to the axial tightening devices.
  • the opto house 31 further comprises a opto-disc 40 which by means of the opto-circuit board 41 indicates the angular or axial position of the drive shaft of the binding gear and thus the axial position of the polar head.
  • the opto-circuit board 41 is connected to the control system.
  • the opto-circuit board 41 is fixed to the binder through the attachment ring 42.
  • the position of the polar head may be determined by magnetic switches or by purely mechanical switches or by a combination of magnetic, mechanical or opto switches or by any other means of sensors capable of indicating the position of the polar head.
  • the sliding platform 32 is connected to bars 34.
  • the spring 33 is provided between the sliding platform 32 and the opto-house 31.
  • the binding head 44 is connected to the polar head 9 with driving pins 48 attached to the pressure transferring axle 45 of the wire spindle lock.
  • the pressure transferring axle 45 is axially movably attached to the spindle 49.
  • the spindle 49 is adapted to transfer rotational force to the pressure transferring axle 45, and by means of the slot 50, the pressure transferring axle 45 is pressed forward along the centre line 27.
  • the free end of the wire returns through the polar head and the binding head and activates the switch 46.
  • Activation of the switch causes activation of the electromagnet 15 which activates the wire lock 26 and further activates the wire feeding motor 17 to reverse so that the wire is tightened.
  • the switch 46 may be omitted and the electromagnet 15 and the wire feeding motor 17, respectively, may be activated by means of a timer counting the time from when the binding sequence is started, and using knowledge about the wire feeding speed.
  • the spring 47 is adapted to enable adjustment of the pressure on the wire between the wire feeding rolls 21 in the wire feeding mechanism 20.
  • the wire is cut by the binding head 44 and the wire nozzle 51 at the position 52 - the wire nozzle 51 is also shown in Fig. 10.
  • the polar head is provided with two holes 53, through which the wire respectively enters and leaves the jaws.
  • the polar-curved shape of the holes provides a constant support of the wire during the entire twisting operation.
  • the binding head 44 has a curved surface 54.
  • the curved surface provides, by rotation of the binding head 44, a pressure on the wheel 55 seen in Fig. 3.
  • the wheel presses the wire lock 26 rearward in order to release the wire lock after the spindle lock 36 has fixed the wire.
  • Figs. 8 and 9 show details of the spindle and the binder housing.
  • Fig. 10 shows details of the wire nozzle.
  • Fig. 11 shows details of the axial tightening device.
  • Fig. 12 shows details of the wire spindle lock 36.
  • the spindle lock may have two functions. One function is to fixate the wire completely. The function is actuated when the spindle lock is in a forward position whereby the wire is locked between the spindle lock and the binding head. According to another embodiment of the invention, another function may be provided wherein an equal release of the wire in both ends of the wire is provided by the wire spindle lock. The retaining force in the wire is provided by an appropriate pressure between the wire spindle lock 36 and the binding head 44, but the wire is not completely locked so that it may slip and thus form an equal release.
  • Fig. 13 shows details of the wire lock.
  • Fig. 14 shows details of the sliding platform.
  • the jaw attachment base comprises a guiding track 56a for guiding the wire into the jaws and a guiding track 56b for guiding the wire out of the jaws.
  • the guiding tracks 56a and 56b are asymmetrically provided.
  • Fastening means 57 are provided for attaching the jaw opening and closing means such as springs, hydraulic, pneumatic or electric motors or actuators etc.
  • the jaws comprise a guiding track 58 for guiding the wire through the jaws and around the objects to be tied together.
  • the jaws of the binder may preferably be detachably mounted so that the jaws can easily be renewed or so that jaws of different size can be attached. Jaws of different size may be necessary depending on the size of the objects that are to be tied together.
  • the jaws 7, the jaw attachment base, the polar head 9 and the binding head 44 may be assembled to one unit which can be detachably mounted to the binder. By detaching this unit the user may gain access to cleaning of the internal parts of the binder and the jaws.
  • the jaw attachment base, the polar head and the binding head can easily be renewed when worn-out etc.
  • the binder may further be provided with wire aligning means 59 in order to de-curl the wire before the wire enters the binding housing.
  • Fig. 18 shows a functional diagram of the control system.
  • Fig. 19 shows a different embodiment of the casing for the binder.
  • the wire coil has in this example been placed between the handle and the mechanics of the binder.
  • the embodiment provides a long binder adapted for reaching into narrow spaces etc.
  • Fig. 20 shows an alternative embodiment of the invention wherein the gripping means comprises a spring loaded pawl 61 mounted pivotally to the spindle lock.
  • the spindle lock for this embodiment is shown with numeral 63.
  • the pawl is lifted by the wire.
  • the spring 62 presses the pawl against the wire, the wire is locked in the reverse direction.
  • the wire is stopped by the binder housing 14, the voltage over the wire feed motor will increase. When the increase in the voltage is detected, the wire feeding is stopped and the feeding direction is reversed. As the wire is prevented from going back through binding head 44 and the polar head (the twisting member), the wire is being tightened.
  • the wire is being cut between the wire nozzle 25 and the binding head 44.
  • the motor is allowed to perform between 135 degrees and 200 degrees turning before the spindle lock 63 is being rotated by the motor and thus before the wire is cut.
  • the pin 73 of the spindle 49 is used for positioning the polar head so that the wire nozzle is positioned correctly in relation to the polar head, allowing the wire to pass through the holes 53.
  • the pin 73 may be connected to mechanical, magnetic or opto-electric sensors or to any other kind of system capable of sensing the angular position of the pin and thus the polar head.
  • Fig. 21 shows the embodiment of Fig. 20 after the wire has been tightened.
  • the spindle lock 63 is pressed forward against the wire, and the wire is now fixated between the spindle lock and the binding head 44 along the engagement lines 65.
  • the pawl will be released from its engagement wire.
  • the jaws 7, the jaws attachment base (Fig. 15), the contact face 64, the polar head 9, the binding head 44 and the bearing 65 are all detachably connected to the binder for easy repair and service. It will be preferred that all of the above mentioned parts may be detached without the use of tools. As an example the parts may all be kept in place by the contact face 64.
  • Fig. 22 shows a preferred embodiment of the contact face.
  • the contact face is provided in the form of a circular disc, whereby the contact face may thus be arranged in close vicinity to the polar head 9 and thus provide support for the binder against the objects being tied together.
  • Fig. 23 shows details of the gripping means with the locking pawl.
  • Fig. 24 shows details of the spindle lock according to the embodiment of the gripping means shown in Fig. 20.
  • Fig. 25 shows an overview of the binder with motor.
  • Fig. 25 shows a binder according to the embodiment of Fig. 20.
  • the binder has a handle 66 and a shield 67 for protecting the user of the binder from hazardous impact with the objects being tied together.
  • the binder has a wire spool 68, a display 69, a battery 70, a trigger 71 and a wire feed motor 72.
  • Fig. 26 shows two different stages of the binding sequence.
  • the wire has been curled around the objects to be tied together.
  • the binding head has rotated and thus locked the wire with a binding force.
  • Fig. 27 shows an embodiment of the locking pawl 61 of Fig. 20.
  • the locking pawl By its engagement with the binding head 44, the locking pawl is held in the shown position wherein the pawl locks the wire.
  • the binding head starts to rotate, the engagement between the binding head and the pawl is released, whereby the wire is released. At this moment the wire is held by the spindle lock 63.
  • the wire is provided with a resiliency or flexibility so that a coiled wire automatically straightens out when released from the coil.
  • the wire follows the guiding means of the jaws in firm contact with the jaws.
  • the wire spool may be provided as a closed magazine. Inside the magazine the wire is coiled with a diameter in the range of 50 mm to 100 mm or even bigger. The wire is released from the magazine, e.g. through a small hole in the magazine. As the wire is release from the magazine, it automatically seeks into a straight configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Wire Processing (AREA)
  • Ropes Or Cables (AREA)

Claims (27)

  1. Procédé de torsadage et de serrage d'un fil métallique avec une partie d'extrémité libre autour d'au moins deux objets pour lier les objets l'un à l'autre, le procédé comprenant les étapes consistant à :
    agencer les deux objets en contact intime,
    placer un élément de torsadage dans une position proche des objets, l'élément de torsadage ayant une surface faisant face aux objets,
    guider la partie d'extrémité libre à travers un trou ou une rainure dans l'élément de torsadage,
    guider la partie d'extrémité libre dans un cheminement au moins une fois autour des objets, afin d'enrouler une partie de fil métallique pour faire au moins une boucle autour des objets,
    guider la partie d'extrémité libre à travers ou dans l'élément de torsadage moyennant quoi le fil métallique forme une boucle fermée et définit une intersection de deux parties de fil métallique, de sorte que ladite surface de l'élément de torsadage se trouve entre l'intersection et les objets,
    saisir l'extrémité de la partie d'extrémité libre du fil métallique,
    serrer le fil métallique en tirant,
    tourner l'élément de torsadage, afin de torsader le fil métallique, caractérisé en ce que
    le fil métallique est coupé par un bord tranchant de l'élément de torsadage.
  2. Appareil (1) de torsadage et de serrage d'un fil métallique autour de deux objets et comprenant :
    un élément de torsadage (9) (44) ayant une surface (54) faisant face aux objets, l'élément de torsadage étant monté de manière telle que ladite surface peut entrer en contact ou être en contact intime avec les deux objets,
    deux mâchoires (7) adaptées pour encercler les deux objets, les mâchoires étant agencées à l'opposé l'une à l'autre et se faisant face dans une configuration en forme de boucle, chacune des mâchoires ayant une partie d'extrémité libre et une extrémité montée de façon pivotante près de l'élément de torsadage,
    des moyens à entraínement mécanique (17) pour fournir un fil métallique à travers un premier trou (53) dans l'élément de torsadage et le long de moyens de guidage (56a, 58) dans une première parmi les deux mâchoires jusqu'à la partie d'extrémité libre de cette mâchoire et en outre jusqu'à la partie d'extrémité libre de la seconde mâchoire et de là le long de moyens de guidage (56b, 58) dans la seconde mâchoire et en outre à travers un second trou (53) dans l'élément de torsadage, afin d'enrouler une partie du fil métallique au moins une fois autour des objets ; moyennant quoi le fil métallique forme une boucle et définit une intersection (28) de deux parties de fil métallique, de sorte que ladite surface de l'élément de torsadage est entre l'intersection et les objets,
    des moyens de préhension (36, 61) pour saisir une partie d'extrémité libre du fil métallique lorsque le fil métallique a été fourni autour des objets,
    des moyens de serrage (29) pour serrer le fil métallique lorsqu'il est saisi par les moyens de préhension,
    des moyens à entraínement mécanique (12) pour faire tourner l'élément de torsadage, afin de torsader l'une autour de l'autre deux parties du fil métallique serré, caractérisé en ce que l'élément de torsadage définit un bord tranchant qui est adapté pour couper le fil métallique lorsque l'élément de torsadage est tourné.
  3. Appareil selon la revendication 2, dans lequel les mâchoires sont réalisées sous une forme non circulaire.
  4. Appareil selon la revendication 2 à 3, dans lequel les moyens pour fournir le fil métallique comprennent un moteur à entraínement électrique.
  5. Appareil selon l'une quelconque des revendications 2 à 4, dans lequel les moyens pour faire tourner l'élément de torsadage comprennent un moteur à entraínement électrique.
  6. Appareil selon l'une quelconque des revendications 2 à 3 ou 5, dans lequel les moyens pour fournir le fil métallique comprennent des moyens à entraínement pneumatique.
  7. Appareil selon l'une quelconque des revendications 2 à 4 ou 6, dans lequel les moyens pour faire tourner l'élément de torsadage comprennent des moyens à entraínement pneumatique.
  8. Appareil selon l'une quelconque des revendications 2 à 3 ou 5 ou 7, dans lequel les moyens pour fournir le fil métallique comprennent des moyens à entraínement hydraulique.
  9. Appareil selon l'une quelconque des revendications 2 à 4 ou 6 ou 8, dans lequel les moyens pour faire tourner l'élément de torsadage comprennent des moyens à entraínement hydraulique.
  10. Appareil selon l'une quelconque des revendications 2 à 11, dans lequel le même moteur à entraínement électrique est utilisé pour le torsadage et l'alimentation.
  11. Appareil selon l'une quelconque des revendications 2 à 3 ou 6 à 7, dans lequel le même moteur à entraínement pneumatique est utilisé pour le torsadage et l'alimentation.
  12. Appareil selon l'une quelconque des revendications 2 à 3 ou 8 à 9, dans lequel le même moteur à entraínement hydraulique est utilisé pour le torsadage et l'alimentation.
  13. Appareil selon l'une quelconque des revendications 2 à 12, dans lequel les moyens de préhension comprennent des moyens actionneurs mécaniques ou électromécaniques et dans lequel les moyens actionneurs mécaniques ou électromécaniques sont sélectionnés parmi un groupe comprenant :
    les électroaimants,
    les actionneurs hydrauliques,
    les actionneurs pneumatiques.
  14. Appareil selon l'une quelconque des revendications 2 à 13, dans lequel le fonctionnement du premier et/ou du second moteur à entraínement électrique, pneumatique ou hydraulique est commandé par un système de commande.
  15. Appareil selon la revendication 14, dans lequel le système de commande est composé de moyens de traitement électronique tels qu'une unité centrale.
  16. Appareil selon la revendication 15, comprenant en outre un affichage connecté à l'unité centrale pour afficher des informations pour l'utilisateur.
  17. Appareil selon la revendication 15 ou 16, comprenant en outre une interface pour la communication entre l'unité centrale et des moyens de traitement externes.
  18. Appareil selon la revendication 15 à 17, dans lequel les moyens de traitement électronique sont adaptés pour varier la force de serrage proportionnellement à une sélection faite par l'utilisateur.
  19. Appareil selon l'une quelconque des revendications 2 à 18, dans lequel au moins la partie de l'élément de torsadage qui fait face aux objets est en acier allié trempé ou en matériaux tel que des alliages de titane ou matériaux métalliques ou céramiques similaires.
  20. Appareil selon l'une quelconque des revendications 2 à 19, dans lequel chacune des parties d'extrémité libre des mâchoires forme une ouverture en forme d'entonnoir s'étendant pour s'éloigner du contact entre les parties d'extrémité libre des deux mâchoires.
  21. Appareil selon l'une quelconque des revendications 2 à 20, dans lequel les mâchoires sont contraintes par ressort vers une position fermée.
  22. Appareil selon l'une quelconque des revendications 2 à 20, dans lequel les mâchoires sont fermées par des moyens à entraínement hydraulique, pneumatique ou électrique.
  23. Appareil selon la revendication 22, dans lequel la fermeture par des moyens à entraínement hydraulique, pneumatique ou électrique est commandée par l'unité centrale.
  24. Appareil selon l'une quelconque des revendications 2 à 23, dans lequel un bras de support porteur peut être attaché au logement de l'appareil pour supporter le poids de l'appareil et pour permettre à l'appareil d'être utilisé de façon éloignée des mains de l'opérateur.
  25. Appareil selon l'une quelconque des revendications 2 à 24, comprenant en outre une face de contact pour supporter l'appareil contre les objets.
  26. Appareil selon l'une quelconque des revendications 2 à 25, dans lequel le fil métallique est un fil métallique élastique pour lier un objet, ledit fil métallique ayant une élasticité d'au moins 50,000 MPa.
  27. Appareil selon la revendication 26, dans lequel le fil métallique est fait à partir d'un alliage ferreux comprenant de 1,2 à 2,0 % de manganèse (Mg), de 0,8 à 1,2 % de silicium (Si) et de 0,06 à 0,15 % de carbone (C).
EP01938010A 2000-06-06 2001-06-06 Procede et appareil de torsadage et de serrage d'un fil Expired - Lifetime EP1296873B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200000872 2000-06-06
DK200000872 2000-06-06
PCT/DK2001/000387 WO2001094206A1 (fr) 2000-06-06 2001-06-06 Procede et appareil de torsadage et de serrage d'un fil

Publications (2)

Publication Number Publication Date
EP1296873A1 EP1296873A1 (fr) 2003-04-02
EP1296873B1 true EP1296873B1 (fr) 2005-03-30

Family

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Application Number Title Priority Date Filing Date
EP01938010A Expired - Lifetime EP1296873B1 (fr) 2000-06-06 2001-06-06 Procede et appareil de torsadage et de serrage d'un fil

Country Status (7)

Country Link
US (1) US20030145900A1 (fr)
EP (1) EP1296873B1 (fr)
AT (1) ATE292049T1 (fr)
AU (1) AU6378001A (fr)
DE (1) DE60109778T2 (fr)
DK (1) DK1296873T3 (fr)
WO (1) WO2001094206A1 (fr)

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JP2006192518A (ja) * 2005-01-12 2006-07-27 Max Co Ltd 充電式電動工具
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US10518914B2 (en) 2008-04-23 2019-12-31 Signode Industrial Group Llc Strapping device
CN102026872B (zh) 2008-04-23 2015-07-15 信诺国际Ip控股有限责任公司 带有传动装置的捆扎设备
JP2011518088A (ja) 2008-04-23 2011-06-23 オルガパック ゲゼルシャフト ミット ベシュレンクテル ハフツング テンショナを有するバンド掛け装置
KR101653715B1 (ko) * 2008-04-23 2016-09-02 시그노드 인터내셔널 아이피 홀딩스 엘엘씨 에너지 저장 수단을 갖는 스트래핑 디바이스
US9254932B2 (en) 2008-04-23 2016-02-09 Signode Industrial Group Llc Strapping device with an electrical drive
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Also Published As

Publication number Publication date
EP1296873A1 (fr) 2003-04-02
DE60109778D1 (de) 2005-05-04
DK1296873T3 (da) 2005-08-08
US20030145900A1 (en) 2003-08-07
DE60109778T2 (de) 2006-01-26
ATE292049T1 (de) 2005-04-15
WO2001094206A1 (fr) 2001-12-13
AU6378001A (en) 2001-12-17

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