WO2011134634A2 - Apparatus and method for strapping wound-up coils, in particular steel coils - Google Patents

Abstract

The invention relates to an apparatus (1) for strapping wound-up coils (2) using a binding tape (3), wherein the apparatus (1) has: a binding tape unrolling apparatus (4) for unwinding a binding tape coil (5), wherein the binding tape unrolling apparatus (4) has drive means (6) with which the binding tape coil (5) can be rotated in order to unwind binding tape (3), a downstream drive and tensioning unit (7), a binding head (8) for connecting two points of the binding tape (3) and a tape guide channel (9) which extends along a circumferential profile (U). In order to achieve a more simple system design without a coiler and looping pit, the invention makes provision for the binding head (8) to be arranged so as to pivot about an axis (A) such that it can assume a first position (I) in which it is in or on the circumferential profile (U) of the tape guide channel (9), and that it can assume a second position (II) in which it is situated in or on the outer circumference of the coil (3) which is to be strapped, wherein the drive means (6) of the binding tape unrolling apparatus (4) are designed to unwind binding tape (3) both from the binding tape coil (5) in the binding tape conveying direction (F) and also to unwind binding tape (3) counter to the binding tape conveying direction (F) onto the binding tape coil (5). The invention also relates to a method for operating an apparatus of this kind.

Description

 Apparatus and method for strapping wound coils

 in particular steel bundles

The invention relates to a device for strapping wound coils, in particular steel straps, with a binding band, the device comprising: a binding belt unwinding device for unwinding a binding belt coil, the binding belt unwinding device having drive means with which the binding belt Coil for unwinding of binding tape can be rotated, a belt-conveying direction subsequently arranged driving and tensioning unit for receiving the untangled from the binding unwinding band, a binding head for connecting two points of the binding band after wrapping the federal with the binding band and a along a Umfangsver- extending belt guide channel for guiding the binding tape around the federal government. Furthermore, the invention relates to a method for operating such a device.

Devices of this type are known in the prior art, for example, from EP 0 194 627 B1 and from DE 10 2008 022 396 B3. The devices serve the setting or the strapping of a good. The required binding tape is thereby provided in the form of a binding tape coil which is unwound from a reel device. The binding tape is then fed to the binding machine as far as the binding head via a ski storage.

The disadvantage here is that a relatively large-volume plant arises, which is associated with a corresponding effort in the production. The plant is correspondingly expensive. The invention is therefore based on the object, a device of the type mentioned so that a compact design can be achieved, which can also be realized more cost-effective. In particular, the strapping or setting of a material web wound into a bundle, in particular of a metal strip, is to be made possible in such a way that fewer system components are required, whereby it is possible to work without a reel and a rail store during the strapping process. Furthermore, a method for operating such a device should be proposed.

This object is achieved with a device in that the binding head is pivotally mounted about an axis that he can assume a first position in which he lies in or on the circumferential profile of the band guide channel, and that he can take a second position, in which it is located in or on the outer circumference of the band to be strapped, wherein the drive means of the binding tape unwinding device are designed to unwind binding tape from the binding tape coil in the binding belt conveying direction and also to wind binding tape against the binding belt conveying direction onto the binding belt coil and / or wherein the driving and tensioning unit is designed to convey binding tape both in the binding belt conveying direction and against the binding belt conveying direction.

The drive means of the binding tape unwinding device preferably comprise at least two rollers (more preferably more than two, eg four rollers), of which at least one is driven by a drive motor. The rollers are preferably arranged below the axis of the binding tape coil and formed for supporting a circumferential location of the binding tape coil. Accordingly, the binding tape coil is due to gravity due to the roles on. The binding tape unwinding device may have two side walls in which a plurality of radially oriented lateral guide rollers are mounted. Thus, the binding band coil is laterally supported friction.

The driving and tensioning unit preferably has at least one driven driver roller with an associated or counteracting roller cooperating with the latter. Furthermore, at least one driven tensioning roller is provided with assigned or cooperating with this counter-tensioning roller.

The driver roller or the driving counter-roller and the tensioning roller or the counter-tensioning roller are preferably mounted in a pivotable about a rotational axis rocker. The rocker can be connected to an actuator in order to pivot the rocker about the axis of rotation and to apply a holding force can. The actuator is preferably a hydraulic or pneumatic piston-cylinder system.

Furthermore, sensor means are advantageously arranged on at least one of the named rollers of the drive and clamping unit, which are designed to detect the movement or the standstill of the roller.

The binding head may be arranged to pivot on a pivot arm which is pivotally mounted about the axis.

The binding head is preferably pivotally arranged in the above-mentioned first position so that it fits into the circumferential course of the band guide channel. For this purpose, the band guide channel preferably at one circumferential point on an interruption.

The method for operating such a device comprises according to the invention the steps: a) unwinding of binding tape from the binding tape unwinding device from the binding tape coil, wherein the drive means of the binding tape unwinding device are driven so that the binding tape is conveyed in a binding tape conveying direction; b) supplying the tie-strip developed in step a) into the driving and tensioning unit and further into the binding head, which is located in a first position, in which the latter lies in or on the peripheral profile of the band guiding channel; c) passing the binding tape through the tape guide channel and around the collar to be strapped until the leading end of the binding tape has returned to the binding head; d) pivoting the binding head from the first position to a second position, in which the binding head lies in or on the outer circumference of the collar to be strapped; e) simultaneously with or after step d): driving the drive means of the binding tape unwinding device such that the binding tape is fed back against the binding tape conveying direction and wound onto the binding tape coil and / or driving the driving and tensioning unit such that the binding tape is fed back against the binding tape conveying direction.

According to the invention, therefore, no reel is provided for the binding tape or the binding tape coil to unwind it from the coil. Furthermore, the device is free of a ski storage between binding tape unwinding and driving and clamping unit. In the drawing, an embodiment of the invention is shown. Show it:

Fig. 1 shows schematically the side view of a device for strapping a wound into a coil metal strip;

2a is the side view,

Fig. 2b shows the top view and

 Fig. 2c is a front view of the essential part of the binding tape unwinding device of the device according to Fig. 1;

3 shows the side view of the binding tape unwinding device, which is equipped with a binding band coil;

Fig. 4 in the side view of the driving and clamping unit of the device according to

 Fig. 1; and

Fig. 5 in the side view of the tape guide channel of the device according to

 Fig. 1 with a binding head, which is located in two different positions.

In Fig. 1, the entire apparatus 1 for strapping a federal 2 metal strip is shown in a schematic side view, consisting of a binding tape unwinding device 4, a driving and clamping unit 7 and this downstream of a pivotable or engageable with a strapping steel strip to tie head 8 In the region of the binding head 8, a band guiding channel 9 (not shown in FIG. 1) is arranged (see FIG. 5), which has a substantially circular shape and is designed to guide the binding band 3 around the collar 2 to be strapped , 1, three sizes G, G ', G "(maximum, average and minimum size) of the collar 2 to be strapped are outlined the two positions I and II marked a point at which the leading end of the binding tape 3 again enters the binding head 8 after the tape guide channel 9 is passed through and thus the binding band 3 has the federal government 2 wrapped. In position II, the binding tape 3 is guided tangentially to the collar 2.

The binding tape coil 5 is laid down in the binding belt unwinding device 4 by means of a crane and rests on at least two, in the exemplary embodiment, a total of four rollers 10 in the bottom region of the binding belt unwinding device 4. A hold-down 22 is mounted at a pivot point 23 and can be subjected to a force by a pneumatic cylinder 24, so that the binding tape coil 5 can not roll up. Drive means 6, which rotate the rollers 10, ensure a desired unwinding of the binding band 3 from the binding band coil 4 in a binding band conveying direction F.

The binding tape 3 thus enters the driving and tensioning unit 7 and from this further into the binding head 8, wherein a deflection 25 between the driving and tensioning unit 7 and binding head 8 is arranged for tape guidance.

As can already be seen in FIG. 1 (this is shown more clearly in FIG. 5), the binding head 8 is arranged on a pivot arm 21 which can be pivoted about a horizontal axis (axis A in FIG. 5). Accordingly, the binding head 8 can assume a first position I, in which it lies in or on the peripheral profile of the band guide channel 9 (see also FIG. 5). But he can also take a second position II, in which he lies in or on the outer circumference of the collar 2 to be strapped. Depending on the size G, G 'or G ", the second position II thus lies at different locations. In FIG. 1, the binding head 8 rests against the outer circumference of the smallest collar 2 of size G" to be strapped. When strapping the collar 2 is on a support saddle 26th In Fig. 2, the construction and the conception of the binding tape unwinding device 4 can be seen, in which case only the skeleton is shown. The binding tape unwinding device 4 has two side walls 11 and 12, which are connected at a distance from each other. Between the two side walls 11 and 12 of the receiving space for the binding tape coil 3 is formed. Below this receiving space is limited by the rollers 10, which form a support for the binding tape coil 5; the binding tape coil 5 is thus present at four circumferential locations on the rollers 10. However, if the diameter of the binding band coil 5 changes due to consumption, it is always ensured that at least two rollers 10 are in contact with the binding band coil 5. The rollers 10 are all driven, which can best be seen in FIG. 1 or in FIG. Thereafter, there is a rotary connection of the rollers 10 via a chain. An unillustrated drive motor drives all rollers 10 over the chain.

Accordingly, the binding tape unwinding 4 has the frame structure shown in Fig. 2 with the integrated therein and according to Fig. 3 trough-like arranged, at least two (in the embodiment four) drive rollers 10, of which at least one drive roller 10 is driven. On the rollers 10, the binding tape coil 5 is directly deposited and vertically supported between the inner and outer walls 11, 12 of the frame structure added. For lateral guidance of the usually very narrow binding band, radially arranged lateral guide rollers 13 are provided both in the inner wall and in the outer wall 11, 12.

As can further be seen in Fig. 3, the hold-down structure 22 is also hinged to the frame structure (shown in the operating position and in the non-operating position), which lies from above on a partial circumference of the binding tape coil 5, in consumption Binding tape material automatically lowered accordingly and counteracts a popping of the binding tape coil 3 to the maximum diameter. Optionally, a plurality of individual retainer can be provided locally spaced from one another over a partial circumference of the binding tape coil 3. hen and trained with, for example, pneumatically or hydraulically operated tracking to the changing diameter of the coil.

Fig. 4 shows a detail in a schematic representation of the drive and clamping unit 7, a mounted in a rotation axis D rocker 18 with tension roller 16 and this beaufschlagendem tension motor (pneumatic motor) and a driver counter roller 15 with this associated sensor 20 to standstill monitoring, a counter tension roller 17 and a drive roller 14 with drive motor comprises. To the rocker 18 engages a pneumatic or hydraulic pressure cylinder 19 (shown in a position next to the drive and clamping unit 7).

FIG. 5 shows as a schematic detail the band guide channel 9 assigned to a coil or steel collar 2 to be strapped, which is slightly larger in diameter than the maximum diameter of a coil or steel collar 2 to be strapped. In the tape feed position, i. when unwinding or pulling the binding tape 3 from the binding tape coil 5 of the binding tape unwinding 4, the binding head 8 takes a the belt guide channel 9 completing position (position I), while he for strapping with clamping, separating and welding the abutting or overlapping ends on the one hand of the trailing and on the other hand wrapped around the coil / steel collar 2 leading binding tape end the inwardly swung, tangentially to a coil / steel collar to be strapped working position (position II) occupies.

The strapping device works as follows:

The binding tape coil 5 is inserted, for example with a column swivel crane in the binding tape unwinding device 4. The hold-down 22 lowers and surrounds the binding tape coil 5 from above. The security bonds of the binding tape coil 5 are removed manually. Then, a slow rotation of the rollers 10 and thereby unwinding of the binding tape 3 in binding tape Conveying direction F, ie in the direction of the automatic driving and clamping unit 7. Here is a threading of the binding tape 3 in the drive and clamping unit. 7

With the help of the drive clamping unit 7, the binding tape 3 is then promoted and biased by the binding head 8 to be strapped steel collar 2 (coil), wherein the driving and tensioning unit 7, to whose roles, the rollers 10 of the binding tape unwinding device 4 respectively rotate analog, is designed to perform several modes of operation.

First, an operation in the mode "driving" tape feed: In this case, the binding tape 3 is introduced from the binding tape unwinding device 4 in the driving and clamping unit 7. The actuator 19 retracts, so that the driving counter roller 15 presses the binding band 3 to the drive roller 14 via the rocker 18. The binding band 3 now runs over the deflection 25 in the band guide channel 9 around the steel collar 2 to be tied, until the leading band end is in the binding head 8.

The binding head 8 then moves from the strip feed position (position I) to the steel collar 2 to be tied (position II), which takes place by corresponding pivoting of the swivel arm 21 The binding and tensioning unit 7 now reverses and winds the "excess" binding tape 3 back onto the binding tape coil 5, so that the binding tape unwinding device 4 becomes memory at the same time. The drive means 6 of the binding tape unwinding device 4 operate correspondingly. The binding band 3 tightens around the steel collar 2 and is biased until the coefficient of friction between the driver roller 14 and driving counter roller 15 is no longer sufficient to transmit the drive torque of the motor. The drive counter roller 15 comes to a standstill. The standstill is detected by means of the sensor 20. Then the operation takes place in the operating mode "clamping": The pressure cylinder 19 acting on the rocker 18 extends (ie increases its effective length) .Above the rocker 18, the tensioning roller 16 presses on the tension counter-roller 17. At the same time, the tensioning motor runs for the drive If the required drive torque exceeds the maximum drive torque of the motor of the tensioning pulley 16, the latter comes to a standstill, with the drive motor constantly pending (request to the motor: maximum torque even at speed "O").

To close the thus tightened binding tape 3 this is severed by a built-in binding head 8 release agent and welded in the binding head 8 with internal clamping. Subsequently, the tension motor stops and the pressure cylinder 19 moves back to the starting position.

LIST OF REFERENCE NUMBERS

1 device for strapping

 2 frets

 3 binding tape

 4 binding tape unwinding device

 5 binding tape coil

 6 drive means

 7 driving and clamping unit

 8 binding head

 9 band guide channel

 10 roll of binding tape unwinding device

11 sidewall

 12 side wall

 13 leadership role

 14 driver role

 15 driver counter roll

 16 tension roller

 17 counter-roller

 18 swingarm

 19 actuator (piston-cylinder system)

20 sensor means

 21 swivel arm

 22 hold-downs

 23 pivot

 24 pneumatic cylinders

 25 diversion

26 carrying saddle 27 leading end

F binding tape conveying direction

U circumferential course

 A axis

 D rotation axis

 G size

 G 'size

 G "size

I first position

 II second position

Claims

claims Device (1) for strapping wound coils (2), in particular steel straps, with a binding band (3), the device (1) comprising: a binding band unwinding device (4) for unwinding a binding band coil (5) in which the binding tape unwinding device (4) has drive means (6) with which the binding tape coil (5) can be rotated for unwinding binding tape (3), a driving and tensioning unit (B) subsequently arranged in the binding belt conveying direction (F) ( 7) for receiving the binding tape (3) unwound from the binding tape unwinding device (4), a binding head (8) for connecting two places of the binding band (3) after wrapping the bundle (2) with the binding band (3) and a along a circumferential course (U) extending band guide channel (9) for guiding the binding band (3) around the collar (2) around, characterized in that the binding head (8) is pivotally arranged about an axis (A), that it a first Position (I) can take in which he in or around - (f) course of the tape guide channel (9) is located, and that he can assume a second position (II), in which he lies in or on the outer circumference of the collar to be strapped (2), wherein the drive means (6) of the binding tape unwinding device (4) are designed to unwind binding tape (3) both from the binding tape coil (5) in the binding tape conveying direction (F) and binding tape (3) against the binding tape conveying direction (F) winding on the binding tape coil (5) and / or wherein the driving and tensioning unit (7) is designed to promote binding tape (3) both in the binding belt conveying direction (F) and against the binding belt conveying direction (F). 2. Device according to claim 1, characterized in that the drive means (6) of the binding tape unwinding device (4) comprise at least two rollers (10), of which at least one is driven by a drive motor, wherein the rollers (10) in particular below the Axis of the binding tape coil (5) and for supporting a peripheral point of the binding tape coil (5) are arranged. 3. Apparatus according to claim 1 or 2, characterized in that the binding band unwinding device (4) has two side walls (11, 12) in which a plurality of radially oriented lateral guide rollers (13) are mounted. 4. Device according to one of claims 1 to 3, characterized in that the driving and tensioning unit (7) at least one driven drive roller (14) with associated driver counter roller (15) and at least one driven tension roller (16) with associated counter-counter-roller (17). having. 5. Apparatus according to claim 4, characterized in that the driver roller (14) or the driving counter-roller (15) and the tension roller (16) or the clamping roller counter-roller (17) are mounted in a about a rotational axis (D) pivotable rocker (18). Apparatus according to claim 5, characterized in that the rocker (18) with an actuator (19), in particular with a hydraulic or pneumatic piston-cylinder system, is in communication with the rocker (18) pivot about the axis of rotation (D) and be able to apply a holding force. Apparatus according to claim 5 or 6, characterized in that sensor means (20) on at least one of the rollers (14, 15, 16, 17) are arranged, which are designed for detecting the movement and / or the standstill of the roller. Device according to one of claims 1 to 7, characterized in that the binding head (8) is arranged for pivoting on a pivot arm (21) which is pivotally mounted about the axis (A). Device according to one of claims 1 to 8, characterized in that the binding head (8) is pivotally arranged in the first position (I), that the binding head (8) in the circumferential course (U) of the band guide channel (9) fits, why the tape guide channel (9) has an interruption at a peripheral location. Method for operating a device (1) for strapping wound coils (2), in particular steel straps, according to one of claims 1 to 9, characterized in that it comprises the steps: a) unwinding of binding band (3) from the binding band Unwinding device (4) from the binding belt coil (5), the drive means (6) of the binding belt unwinding device being driven to convey the binding belt (3) in a binding belt conveying direction (F); b) feeding the binder strip (3) unwound in step a) into the driving and tensioning unit (7) and further into the binding head (8) located in a first position (I), in the latter in or on the peripheral path ( U) of the tape guide channel (9) is located; c) passing the binding tape (3) through the tape guide channel (9) and around the collar (2) to be strapped until the leading end of the binding tape (3) has returned to the binding head (8); d) pivoting the binding head (8) from the first position (I) to a second position (II), in which the binding head (8) lies in or on the outer circumference of the collar (3) to be strapped; e) simultaneously with or after step d): driving the drive means (6) of the binding tape unwinding device such that the binding belt (3) is fed back against the binding belt conveying direction (F) and wound onto the binding belt coil (5) and / or driving the propellant and Clamping unit (7) such that the binding tape (3) is fed back against the binding tape conveying direction (F).