EP0008784B1 - Apparatus for obtaining fast wound coils of equal diameters by coiling several small bands - Google Patents

Abstract

1. A device for obtaining tightly wound coils of equal diameter when winding multiple narrow strips, here called "strands", produced by slitting a hot - or cold-rolled strip, whereby the said strands are wound into narrow coils on a common coiler mandrel (7) ; and wherein the device comprises a spacer shooter with a boom (6a) that can be swung in the vertical plane onto the mandrel. The said boom comprising a magazine unit for storing long fiberboard spacers or the like, a device for moving the spacers out of the magazine unit in the direction of propulsion, and also an idling tracer roll (38) with a pinch roll unit (39, 40) arranged in front of it for propelling the spacers under the tracer roll, the said boom being characterized by the fact that the magazine unit has a number of parallel compartments (44 to 48) corresponding in number to the number of narrow coils and arranged over the entire width (Bmax ) taken up by the narrow coils along the coiler mandrel, whereby the width of each magazine compartment is selected to match the strand width in the respective narrow coil ; the idea being that the compartments can be variably arranged side-by-side in the boom in such a way : that each magazine compartment, seen in the direction of strip travel, is aligned to the narrow coil to which it is allocated width-wise, that a selectively operation spacer shooter (60, 75) is allocated to each magazine compartment and that both the tracer roll (38) and the pinch roll unit (39, 40) are through-rolls which cover the strip width and all selectively inserted spacers (49).

Description

The invention relates to a device for achieving tightly wound bundles of the same diameter when winding up a plurality of narrow strips, which are obtained by slitting a strip produced by hot or cold rolling and, after being wound onto a common mandrel of a reel, fed as a narrow strip bundle for further processing, consisting of a Strip insertion device with a boom that can be swiveled perpendicularly to the reel mandrel, which has a cassette part for receiving elongated strips of cardboard or the like, a device for conveying the strips from the cassette part in the direction of insertion, and a free-running feeler roller with an upstream drive roller set to forward the strips includes under the feeler roller.

In strip treatment plants for producing narrow-band coils of small width, reeling the longitudinally divided narrow-band gap widths side by side on a common mandrel entails problems which have their origin in the nature of rolled metal strips.

As is known, a rolled metal strip generally shows changes in thickness in the transverse direction, which are due to inaccuracies in the rolling. The metal band is usually slightly thicker or thinner in the middle than on the sides and there are different internal tensions in the band between the band sides and the band center. Different sliver thicknesses in slitting lines cause different coil diameters when winding. In new slitting lines, depending on the material requirements, there are different braking systems (e.g. DE-OS 1552598) that enable the individual bundles to be wound tightly. In addition to the disadvantage of the direct action of these known systems on the usually very sensitive surfaces of the metal strips, there is also the fact that these braking systems can often no longer be installed in existing systems. Therefore, in many cases, paper strips are manually inserted into the winding gap of the respective bundle in order to compensate for the differences in material thickness and to wind the individual bundles tightly. This often happens from the point of view of accident protection under difficult and particularly vulnerable working conditions and has therefore already led to serious accidents in the past.

Proceeding from this, the applicant has the solution to the task of being able to achieve straight and tightly wound bundles of the same diameter without unnecessarily stressing the surfaces of the narrow-band slit strips by using external aids in the form of restraint devices such as band brakes or band tensioning rollers and without endangering an operator the technology already enriched by the teaching to provide an automatically operating strip insertion device with a cassette for receiving strips which are slightly smaller in width than the smallest narrow-band gap width occurring in the respective cutting program.

The strip insertion device can be moved in the transverse direction on a guide and can be directed from a remote control panel, in such a way that the strip insertion device is brought into exact position in front of any desired narrow-band collar by constant transverse movement and by placing strips under it Paper, cardboard, plastic or metal are - between individual layers of the bundles being built up compensating for the diameter deviations caused by the differences in strip thickness when winding up slit strips (cf. DE-U 7718103).

Because the device described above is equipped with a single cassette and is designed in such a way that the cassette only accepts those strips which correspond in width to approximately the smallest narrow-band gap width occurring in the cutting and thus reel program, problems are associated with it, When a cutting program is available, which has considerable differences in the width of the individual narrow-band gap widths, the desired tight and straight bundles can be achieved. It is true that flawless bundles are still achieved on the narrowest slit strips and the slit strips differing only insignificantly in their width, since - as explained above - the cassette is only occupied with the paper strips required for the smallest dimensions of the slit strips. However, as soon as a cutting program with very different narrow-band gap widths is available, it can be expected that in the case of bundles with broader split bands - viewed in the transverse direction - sag of the split bands will occur, even if the wide bands with e.g. two or even more narrow paper strips inserted next to each other can be underlaid. Such slit bands sagging in the transverse direction increase the risk of sagging winding layers which lead to loosening and edge displacements of a narrow-band slit band.

The invention is therefore based on the object of providing a strip insertion device which, even in any cutting program with very different narrow-band split strips, enables the reeling of fixed and straight-line narrow-band split strips, and on the other hand nevertheless ensures that the system is in the operating area before the reel-up Execution there not agile work such as threading the beginning of the tape, gluing the finished bundles etc. is easily accessible.

• das Kassettenteil über die gesamte Breite (B_max) des von den Schmalband-Bunden längs des Haspeldorns eingenommenen Bandbereiches eine der Zahl der Schmalband-Bunde entsprechende Anzahl von nebeneinander angeordneten Einzelkassetten mit jeweils einer entsprechend der Streifenbreite der Schmalband- Bunde wählbaren Breite aufweist, die
• in veränderbarer seitlicher Relation so in den Ausleger einsetzbar sind, daß jede Einzelkassette in Bandlaufrichtung gesehen auf den ihr breitenmäßig zugeordneten Schmalbandbund ausgerichtet ist,
• daß jeder Einzelkassette jeweils eine selektiv betätigbare Einschiebeeinrichtung (60, 75) zugeordnet ist, und daß sowohl die Tastrolle als auch der Treibrollensatz aus sich über die Breite des Bandbereiches erstreckenden, alle selektiv eingeschobenen Streifen erfassende Walzen ausgebildet sind.

According to the invention, this object is achieved in that

• the cassette part over the entire width (B _max ) of the band area occupied by the narrow-band bundles along the coiler mandrel has a number of individual cassettes arranged next to one another corresponding to the number of narrow-band bundles, each with a width that can be selected in accordance with the strip width of the narrow-band bundle
• can be inserted into the boom in a changeable lateral relation so that each individual cassette is oriented in the direction of tape travel on the narrow band bundle assigned to it in width,
• that each individual cassette is assigned a selectively operable insertion device (60, 75), and that both the feeler roller and the drive roller set are formed from rollers that extend over the width of the belt area and that hold all the selectively inserted strips.

In this way it is possible, depending on the cutting program, to feed strips to each narrow-band bundle in a width corresponding to its width, since selectable individual cassettes are available in a wide variety of bandwidths, each of which is used aligned with the center of the different bands. The rewinding shaft of the rewinder, for example, can serve as a setup aid for determining the exact position of each intermediate cassette in the main cassette. In addition, there is no need for any transverse movement of the device during reeling. The strip inserting device is operated by pushing an operator from a remote control panel, which causes the selective insertion of a paper strip into the winding slot of the sagging slit in each case, namely soft paper strips are sent between the individual winding layers of a narrow-band slit bundle until the incoming one Split band is tight. Several insertion processes can be selected at the same time without difficulty, i.e. there is a simultaneous insertion of paper strips on different narrow-band slit coils.

A compilation of individual cassettes for another cutting program can be prepared by means of setup aids during operation if, according to a further invention proposal, an exchangeable main cassette which is detachably connected to the extension arm is provided for receiving the individual cassettes.

Details of the design of the individual cassettes and their releasable attachments to the boom or to the main cassette are the subject of claims 3 to 5.

The strips themselves are removed from the respective individual cassette by means of strip insertion arms assigned to each individual cassette, as can be gathered from patent claims 6 to 10. The embodiment according to claims 9 and 10 is to be used with particularly small slit strips, since with the small slit widths the insertion arm is accordingly only very narrow, while the lifting magnets have considerably larger dimensions, so that the magnets are no longer in the arm, the width of which is determined by the width of the individual cassette can be arranged. However, the magnets can be accommodated in any case on the displaceable swivel arms for moving the insertion arms, and then only those insertion arms remove strips from the individual cassettes, the associated lifting magnets of which are actuated and establish a rotationally fixed connection between the common axis and a swivel arm, with which the longitudinally movable displacement movement is also transmitted to the insertion arms.

The strip inserting device mounted in front of the reel with the wide main cassette constricts this operating area of the installation to a considerable extent, so that the work which is necessarily to be carried out in this zone can hardly be carried out entirely without hindrance. In such a case, the invention according to claims 11 to 14 provides that the area in front of the reel can also be cleared by a strip insertion device which can be moved parallel to the reel mandrel.

The pivotable boom is expediently designed to be telescopically retractable and extendable.

Claim 16 specifies a development of the subject of the invention for the condition that the running-in ratios of the slit strips - which are determined by the constantly changing ratio of the point of departure of the strips on the deflection roller to the point of contact of the strips on the reel when the diameter on the reel is so favorable - that the shield-like supporting part cam tracks according to DE-U 7718 103, which otherwise make an adjustment of the adjustment movement of the cantilever with the cassette to changing run-up angles, can be omitted. In this case, the boom of the strip inserting device, which in this case is fixed overall in front of the reel, is either pivoted upwards or downwards in the telescopic position of the boom, thus clearing the space in front of the system for operating personnel.

• Fig. 1 eine Seitenansicht mit querverfahrbarer Streifen-Einschiebevorrichtung,
• Fig. 2 eine Seitenansicht einer ortsfesten Streifen-Einschiebevorrichtung,
• Fig. 3 eine Draufsicht auf das vordere Teil des Auslegers mit Kassettenteil,
• Fig. 4 einen Schnitt nach der Linie IV-IV in Fig. 3 in größerem Maßstab, und
• Fig. 5 eine Darstellung entsprechend Fig. 4 in einer anderen Ausführungsform.

In the drawing, exemplary embodiments of the strip insertion device according to the invention are shown. Show it

• 1 is a side view with a transversely movable strip insertion device,
• 2 shows a side view of a stationary strip insertion device,
• 3 is a plan view of the front part of the boom with a cassette part,
• Fig. 4 is a section along the line IV-IV in Fig. 3 on a larger scale, and
• 5 shows a representation corresponding to FIG. 4 in another embodiment.

Fig. 1 shows an embodiment with a transversely movable strip insertion device 6 with boom 6a. The stationary substructure 1 has two pairs of bearing blocks 2 for impeller axles 3, on which two pairs of rollers 4 are rotatably mounted via roller bearings. A pair of rollers 4 arranged one behind the other is used to guide U-shaped guide rails 5, which are connected to a support part 6b for the strip insertion device 6 and are long enough to protrude from the support part 6b. The substructure 1 is arranged outside the band area determined by the length of the reel mandrel 7, so that the strip insertion device can optionally be moved outside the band area or within the band area in front of the reel mandrel 7. In Fig. 1 you can still see the maximum outer circumference 8 of a narrow band bundle and the run-up direction 9 of the slit bands. At the beginning of the reeling process, the boom is in the position 6a 'shown in broken lines and the slit strips run in via the runway 9'.

The arm 6a is pivotally arranged in a known manner with respect to the support part 6b of the strip insertion device 6, in that the support part 6b is provided with a pivot axis 10 for two pivot levers 11, which can be pivoted together by a hydraulic servomotor 12 which oscillates at 13 Support tabs 14 of a guideway 5 is fixed. The arm 6a is connected in an articulated manner via a pair of lugs 15 to a hinge pin 16 at the free end of the swivel arms 11 and is supported by a pair of rollers 17 on curved tracks 18 of the support part 6b. This type of swivel guide for the boom 6a is already described in the German utility model 7718 103.

The rollers 4 are height-adjustable via eccentric bearings, not shown, in order to be able to adjust the strip insertion device 6 relative to the reel mandrel 7 if, due to the weight of the strip insertion device with unsupported support via the projecting u-shaped guide rails 5, inaccuracies due to the deflection of the guideways or the like should occur. For the same reason, 1 guide rollers 19 are mounted in the substructure with a vertical axis, which are pressed against an end face of the rollers 4 and laterally adjustable via eccentric bearings, not shown. On the one U-shaped guide rail 5, a toothed rack 20 is fastened, into which a toothed pinion of a motor carried by the substructure 1 engages (not shown).

Before the details of the cantilever 6a are described with the design of the cassette part according to the invention, reference is made to the embodiment of FIG. 2. The strip insertion device here only consists of the extension arm 6a, which corresponds to that according to FIG. 1, but is arranged such that it can be pivoted without housing via tabs 21 on a stationary pivot axis 22. The pivot axis 22 is carried by stationary bearing blocks 23 in such a way that the entire strip insertion device is arranged in the belt area in front of the reel with the reel mandrel 7. Here too, at least one hydraulic servo motor 24 is used for pivoting the boom 6a, which is fixed in an oscillating manner at 25 and is articulated at 26 to swivel brackets 27, which are rotatably mounted on the swivel axis 22 in addition to the brackets 21. The swivel brackets 27 carry stop blocks 28 which limit the swivel path of the brackets 21 and normally always bear against the stop blocks 28 under the weight of the cantilever arm 6a. This makes it possible to swing the boom 6 a away from the reel mandrel 7 in a counterclockwise direction in order to clear the space in front of the reel for threading the split strips, although the strip insertion device is arranged stationary in the band area. The telescopic extension of the boom 6a by means of an adjusting device 29, which is also necessary for other reasons, supports this clearing by the boom 6a being drawn into the device 29 when it is pivoted away.

The arm 6a could also be pivoted downwards about the hinge pin 26 in a clockwise direction if a detachable mounting for the pivot axis 22 is provided. If the tabs 21 and 27 are wedged on the pivot axis 22, the stop blocks 28 can be omitted.

3 shows a top view of the front part of the arm 6a with the part of the cassette divided into exchangeable individual cassettes. A main cassette 30 (FIG. 4) with the side walls 30a, the rear transverse wall 30b and the bottom wall 30c can be seen. The main cassette 30 is connected to side bearing eyes 32 by screws 31. These bearing eyes 32 are mounted on an axis 33, the meaning of which will be explained later. As can only be seen from FIG. 1, the main cassette 30 is firmly connected via flanges 34 to the remaining part of the extractor 6a with the telescopic adjusting device 29.

At the free end, the main cassette 30 is connected with its side walls 30a by means of screws 36 to projecting end shields 37, in which, in a known manner, a feeler roller 38 bearing on the outer circumference 8 'of the narrow-band bundle and a drive roller set with this drive roller with a drive roller 39 and a counterpressure roller 40 are mounted , all of which have the shape of rollers and extend over the entire width of the belt area, which is denoted by B _{max in} FIG. The driving roller set 39, 40 is preceded by converging "guide walls 41, 42 which guide advanced strips between the rollers 39, 40. The driving roller 39 is from the sensing roller 38 a toothed belt 43 driven, which is rotated while resting on the outer circumference 8 of the narrow-band bundles.

A plurality of interchangeable individual cassettes 44 to 48 can be hung next to one another in the main cassette 30, FIG. 3 clearly indicating that these individual cassettes are adapted to the cutting program, i.e. the width of the individual slit strips have different widths in order to be able to accommodate strips of corresponding width. In the individual cassette 44, for example, a pack of paper strips 49 is inserted, which has a slightly smaller width than the width of the individual cassette 44. In such a case, the pack of paper strips 49 is secured by light spring elements 50 inserted laterally.

The exchangeable individual cassettes 44 to 48 can be inserted into the extension 6a or the main cassette 30 in any lateral relation. As shown for the individual cassette 44 in FIG. 4, each individual cassette has an angle 52 in its rear transverse wall 51, the horizontal leg of which can be placed on a bar 53 on the inside of the transverse wall 30b of the main cassette 30. Via a toggle 54 inserted into the horizontal leg of the angle 52, the rear wall 51 can be clamped at any point on the continuous bar 53. The angles 52 are only partially visible in the top view according to FIG. 3 for the narrow individual cassettes 45 to 47, since they are otherwise covered by the insertion arms 55 lying above them. At the free ends, the individual cassettes according to FIG. 4 are provided with spring clips which are open at the bottom and which can be snapped in as a snap-on holder via a cross bar 57 of the arm 6a or the main cassette. Such a snap holder could of course also be provided for the rear end of the individual cassettes in replacement of the lockable toggle connection 51 to 54. The main cassette 30 could be formed back to the side walls 30a, i.e. practically as a cassette.

It is also possible that the main cassette 30 is detachably connected to the cantilever arm 6a in this case and is therefore interchangeable in order to prepare a main cassette with selected individual cassettes of a certain width and certain lateral relation for a changed cutting program and when changing the cutting program against the in the cassette inserted in the strip insertion device. A rod 58 with displaceable pointers 59 could serve as a setting aid, as can be seen in FIG. 3 and is used here for adjusting the individual cassettes 44 to 48 on the rear wall 30b of the main cassette 30.

It goes without saying that the division of a cassette part into individual cassettes of any width and any lateral relation can also take place in that individual partition walls can be used in a main cassette which extend to the bottom wall 30c of the main cassette and form individual cassettes between them in the sense of the invention.

In order to advance the uppermost paper strip of a stack of paper strips, for example 49, the aforementioned movable insertion arm 55 is used in a known manner, with an insertion roller 60 which is locked against rotation in the direction of insertion of the strips (FIG. 4). In the exemplary embodiments according to FIGS. 4 and 5 of this part of the insertion device, the already mentioned axis 33 is used for the rotationally fixed mounting of a plurality of pivoting levers 61 and 62 (FIG. 5) for actuating the insertion arms 55. These are in the top view according to FIG. 3 Swivel levers 61 and 62 are also not to be seen, since they are arranged within the insertion arms 55 which are U-shaped in cross section. The common axis 33 or 63 (FIG. 5) is rotatably connected at both ends to cranks 64, on which bifurcated piston rods 65 of pressure medium-operated servomotors 66 engage, which are connected at 67 to the boom 6a or the main cassette 30 . The common axis 33 or 63 can be rotated between two rotational positions via the servomotors 66.

In the exemplary embodiment according to FIG. 4, the length of the common axis 33 between the cranks 64 has a square cross-section 33a, with which the swivel levers 61 together with the insertion arms 55 articulated at 68 can be secured in any lateral relation by means of a locking screw 69. For this purpose, U-shaped receptacles 70 are used, which can be designed with the swivel levers 61 as a unit or as a loose type of adjusting ring.

Since in the exemplary embodiment in FIG. 4 a rotation adjustment of the common axis 33 results in pivoting of all pivoting arms 61 with the advance of all insertion arms 55, selective insertion of paper strips from the various individual cassettes 44 to 48 according to the exemplary embodiment in FIG. 4 thereby enables a remote-controlled solenoid 71 is arranged within each insertion arm 55, which carries a pawl 72 for locking or releasing the insertion roller 60 provided with a locking wheel 73. In Fig. 4, the pawl 72 is shown locked, so that the insertion roller 60 is locked in advance of the insertion arm 55 and expediently pushes the uppermost paper strip of the stack 49 forward between the guide walls 41, 42 so that the paper strip from the drive roller set 39, 40 is detected and is inserted under the relevant incoming narrow band. In this respect, the basic idea of the exemplary embodiment according to FIG. 4 is that the locking of the insertion rollers 60 can be switched on selectively by remote-controlled means.

In the exemplary embodiment according to FIG. 5, the insertion roller 75 is, as is known, a roller with freewheel, that is to say with automatic blocking in one direction of rotation. Here is the selective front pushability of paper strips enables the rotationally fixed connection of the pivot lever 62 to the common axis 63 to be selectively switched on by remote-controlled means. These remotely controlled means each consist of a pivoting lifting magnet 76 carried by the pivoting levers 62 and which actuates a locking pin 77 which arrives in a rotationally fixed connection with the axis 63. In Fig. 5, this locking pin 77 is piloted, passes through the hub 62a of a pivot lever 62 and presses against a flattening of the common axis 63. With this setting of the locking pin 77, the rotationally fixed connection between the common axis 63 and the pivot lever 62 is made, so that this pivot lever - and only this - is pivoted and the insertion roller 75, which is locked in the direction of insertion, is actuated when the piston rod of the servomotor 66 is extended. When falling, the insertion roller 75 runs along empty, after which the starting position is reached again and the lifting magnet 76 is automatically switched off and the locking pin 77 is activated. This embodiment is recommended when the receiving width of a single cassette, for example 47, is so small that a lifting magnet 71 (FIG. 4) arranged in an insertion arm 55 cannot penetrate into the interior of the single cassette, which is necessary in order to include even the lowest one Pushing away paper strips from a stack.

The solenoids 71 and 76 can be selectively selected from a control panel, possibly also several at the same time, after which the servomotors are actuated in order to allow the selected insertion arms 55 with insertion rollers 60 and 75 to act to advance a paper strip.

Claims (16)

1. A device for obtaining tightly wound coils of equal diameter when winding multiple narrow strips, here called « strands », produced by slitting a hot - or cold-rolled strip, whereby the said strands are wound into narrow coils on a common coiler mandrel (7) ; and wherein the device comprises a spacer shooter with a boom (6a) that can be swung in the vertical plane onto the mandrel. The said boom comprising a magazine unit for storing long fiberboard spacers or the like, a device for moving the spacers out of the magazine unit in the direction of propulsion, and also an idling tracer roll (38) with a pinch roll unit (39, 40) arranged in front of it for propelling the spacers under the tracer roll, the said boom being characterized by the fact that the magazine unit has a number of parallel compartments (44 to 48) corresponding in number to the number of narrow coils and arranged over the entire width (B_maX) taken up by the narrow coils along the coiler mandrel, whereby the width of each magazine compartment is selected to match the strand width in the respective narrow coil ; the idea being that the compartments can be variably arranged side-by-side in the boom in such a way : that each magazine compartment, seen in the direction of strip travel, is aligned to the narrow coil to which it is allocated width-wise, that a selectively operation spacer shooter (60, 75) is allocated to each magazine compartment and that both the tracer roll (38) and the pinch roll unit (39, 40) are through-rolls which cover the strip width and all selectively inserted spacers (49).

2. A device according to Claim 1 wherein a replacable housing (30), detachably connected to the boom (6a), accommodates the individual magazine compartments (44 to 48).

3. A device according to Claim 2 wherein the individual magazine compartments (44 to 48) can be detachably fastened in any desired width-wise arrangement along the rear transverse wall (30b) of the magazine housing (30).

4. A device according to Claim 3 wherein the individual magazine compartments (44 to 48) are provided at their free ends with spring clips (56) open on their underside which snap down over a transverse rad fixed to the boom (6a) or to the magazine housing.

5. A device according to Claim 2 wherein individual partitioning walls can be inserted so as to touch the bottom (30c) of the magazine housing (30), thus forming the individual magazine compartments.

6. A device according to Claim.1 wherein each magazine compartment (44 to 48) is allotted a separate propelling arm (55) which is connected for operating purposes to a pivot lever, whereby all pivot levers can be laterally adjusted on and connected with torsional rigidity to a common shaft (33, 63), the said shaft (33, 63) being such that it can be axially shifted into two positions.

7. A device according to Claim 6 wherein the shooting rolls (60) of the respective spacer propelling arms (55) can be selectively locked by remote-controlled elements (71, 72). See Fig. 4.

8. A device according to Claim 7 wherein each remote-controlled assembly comprises a lifting magnet (71) that moves a pawl (72) into the ratchet (73) of the spacer shooting roll (60).

9. A device according to Claim 6 wherein the spacer shooting rolls (60) can be selectively operated by selectively establishing a torsion-proof connection between the respective pivot levers. (62) and the common shaft (63) by means of remote-controlled assemblies (76_; 77). See Fig. 5.

10. A device according to Claim 9 wherein each remote-controlled assembly, one to each pivot lever, establishes a torsion-proof connection between the shaft (62) and a locking spigot (77) through the action of the lifting magnet (76) moving with the pivot lever.

11. A device according to Claim 1 wherein the spacer shooter can be shifted outside the strip zone, moving parallel to the coiler mandrel, the said device being characterized by a stationary base frame (1) that projects beyond the strip zone and has two pairs of runners (4) over which two U-shaped guide beams (5) move, bearing a support (6b) on which the pivoted bracket of the spacer shooter unit (6) is mounted.

12. A device according to Claim 11 wherein the runners (4) can be height-adjusted via eccentric elements.

13. A device according to Claim 12 wherein guide rollers (19), each with vertical axis, are mounted on the base frame, pressed against one of the runner side faces (4) and are laterally adjustable via eccentric elements.

14. A device according to Claim 11 wherein a gear rack (20) fixed to one of the U-shaped guide beams (5) is in mesh with the pinion of a motor attached to the base frame (1).

15. A device according to Claims 1 and 14 wherein the pivoted boom (6a) can be shipped telescopically in and out of the strip zone.

18. A device according to Claims 1 and 15 wherein, in the case of a spacer shooter being permanently fixed in the strip zone in front of the coirer, the pivoted boom (6a) in its moved-in condition round the fixed pivot point (22) on the base frame can be swung away from the mandrel (7) to free the operating area in front of the coiler from obstruction (see Fig. 2).

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