FI90960B - Device for unwinding a so-called metal packaging wrap from a wire reel - Google Patents

Description

90960

Apparatus for unwinding a metallic so-called packaging yarn from a yarn spool 5

The present invention relates to a device as defined in the preamble of claim 1 for unwinding a packaging yarn from a yarn spool. The invention thus relates to the handling of heavy metal packaging wire spools, which are transported from the factory to the place of use so that the wire can be unwound from the spool on site and used for packaging objects, such as pulp bales. The main object of the invention is heavy coils weighing about 1 ton and having a wire diameter of about 3 mm. The diameter of the coil 15 is about 1 m, and the length of the coil is about 1 m; the diameter of the cylindrical core of the coil is about 30 cm.

After manufacture, the coil is fastened with four straps and has hitherto been placed upright on a pallet for transport by truck or container. Upon arrival at the site, the pallet is moved by a transfer crane, forklift and / or pallet truck. The reels on the pallets are stored in the storage area from where they are retrieved if necessary, usually using a forklift, the forks of which are attached under the pallet. The pallet is then lowered onto a specially made washer comprising vertical sleeves for receiving a central column consisting of four tubes arranged in a square pattern. This column is pushed 30 down into the core of the coil and the ends of the four tubes are attached to the sleeves by means of a quick connector to lock the tubes.

The special unwinding crown is manually raised to a height of about 2 meters and pushed down onto the column 35 while being guided along tubes which prevent the crown from rotating. This eventually rests on the top end.

2 The straps that hold the spool together are then cut open, after which the thread can be unwound while the crown guides it.

5

The functions described above and the equipment used in connection therewith involve certain drawbacks. The use of pallets incurs additional costs because it is not economically viable to return to the yarn mill pallets of 10 pallets that have been used on long journeys between different countries. Pallets are scrapped, which leads to significant additional costs. In addition, pallets prevent the optimal use of the cargo space during transport, which in turn means correspondingly higher transport costs. 15 It is often difficult to get close with a forklift when unloading a load from a transport vehicle and sometimes it is necessary to pull the pallet out with the spool standing on it, which sometimes causes the spool to fall off the pallet, which can be damaged if the wire is disordered.

The precise positioning of the pallet on the special washer to be received by the column must be done in the right place above the sleeves which are to be connected to the ends of the column tubes. In other cases, this may be a time consuming operation and may increase the processing time.

Once the column is lowered into the core of the coil and attached to the washer 30, which can be quite a cumbersome operation, the crown must finally be raised to a height of almost two meters before it can be lowered onto the end of the standing column. Because the crown weighs about 20 kg, the lifting operation is hard work, which can lead to physical injury-35 if not performed by sufficiently strong workers.

The working methods and equipment used so far are unsatisfactory, especially if the workers are women, 3 90960, as is increasingly the case in the industrial sectors concerned.

It is therefore an object of the invention to provide a device which eliminates the need for pallets and by means of which the wire spool with its unwinding crowns can be placed in the working position on a vertical column quickly and without workers having to carry out heavy and dangerous lifting operations.

According to the invention, such a device is provided. The main features of the device appear from the appended claim 1.

15

According to the invention, the wire spools are loaded horizontally for transport to the user, whereby they take up less cargo space than if they were transported on pallets in the usual way. The spools are held together in the usual manner by 20 four fastening straps.

The coils are stored horizontally in the user's premises. They are retrieved from the storage area by a transfer crane, fork lift truck or some other lifting device which holds the reel in a horizontal position and transfers it to a device according to the invention in the middle of which there is a column turned down to a horizontal position. The coil is then moved to a position where it is concentric with the column, so that it can be easily placed on top of the column. Finally, the ai-30 does not have much difficulty in raising the unwinding crown by about one meter until it is flush with the horizontal column and moves the crown forward to the position against the coil.

These measures do not require a pallet that would later need to be scrapped.

The column in the middle is then turned back up to a vertical working position by means of hydraulic cylinders or pneumatic cylinders, after which the winding of the wire from the spool can be started. In order to prevent the unwinding crown from passing with the wire 5 and detaching from the column, the column according to a preferred embodiment of the invention is provided with a latch which prevents the crown from moving axially upwards along the column.

These and other features and advantages of the invention will be explained in more detail below with reference to the accompanying drawings, in which a preferred embodiment of a device according to the invention is shown.

Figure 1 shows a perspective view of an unwinding crown, a double conical wire cage with four guide arms at the top and bottom.

Figure 2 shows a front view of a device according to the invention with a frame supporting a central column, which can be pivoted between horizontal and vertical end positions by means of hydraulic cylinders or compressed air cylinders, in which the wire spool and crown are shown in dotted lines in a vertical column.

Fig. 3 is a schematic side view showing how the horizontal wire spool is placed on a horizontal center column, after which it is turned up to a vertical position.

Figure 4 is a schematic top view with the flap in an upright position.

Fig. 5 shows a separate view of the column seen from above in its vertical position, enlarged and provided with a locking device in the device according to the invention.

90960 5

Figure 6 shows a section through the locking device of the device according to the invention in its neutral position with the locking arms retracted.

5

Fig. 7 shows the same section as in Fig. 6 along the line 7-7 of Fig. 5, in which the locking arms are turned out to the locking position.

The method according to the invention is briefly described above and defined in more detail in claim 1, for which reason the following description is mainly directed to a preferred embodiment of the device according to the invention.

As can be seen in Figure 2, a transverse base 12 is supported by a central post 10 having vertical pivot arms 14 at its ends (Fig. 3) pivotally mounted at its upper end on two concentric bars 16 supported by two lateral components 18 of the frame.

On top of the base is a base ring 20 which acts as a base for a vertical spool of yarn 22 of packaging yarn 24 to be unwound by pulling the yarn up-25 and unwinding it round by turn.

To guide the wire during unwinding, an unwinding crown 26 is placed on top of the column, which rests on the upper end of the spool 22. The crown has the shape shown in Fig. 1 and is provided with four upper guide arms 28 and four lower guide arms 30.

The column 10 consists of a square tube 32 with four diagonal, protruding longitudinal flanges 34 at the corners to form a four-to-35 longitudinal guide groove 36. When the spool 22 is placed on the column 10, the arms 28, 30 are guided into the guide grooves 36 between the flanges so as to prevent the spool 6 from rotating during unwinding.

The crown is double conical and implemented as a wire cage comprising an outer ring 40 which guides the wire during unwinding. It also comprises elastic hose sections which form outwardly directed arms 42 which must be guided aside by the wire during unwinding. This provides a certain braking effect so that no twists are created in the wire.

10

In Fig. 3, dotted lines are used to show the column 10 turned down to a horizontal plane, where the horizontal spool 22Ά is supported by a fork lift fork 45A or a fork truck so-called center spike 45B, or a loop 45C threaded through the spool core and attached to a hoisting rope. siirtonostu-variant. The horizontal coil 22a is kept flush with the horizontal column 10 and transferred thereon.

The crown 26 is then raised until it is flush with the horizontal column 10 and pushed over it and secured by a latch mechanism as described below. Finally, the column is turned up to a vertical position by means of two hydraulic or compressed air cylinders 44 up to the position shown in Fig. 2, in which the coil 22 is in its vertical position together with the crown.

Four fastening straps (not shown here) are cut off, leaving the spool ready to be unwound.

As shown in Figures 5-7, the post 10 is provided at its upper end with a latch mechanism 46 comprising two pivotable locking arms 48, 50 which can be retracted 35 to a neutral position in two rectangular openings 52, 54 in opposite walls 56, 58 (Figure 7). 6, and which can be turned 90960 7 out of the locked position according to Fig. 7 when they are intended to prevent the crown from being inadvertently pulled up if the wire twists and becomes entangled in the crown during unwinding. In this way, the crown is prevented from coming off the column and possibly causing damage or injury.

Each locking arm consists of a sheet metal arm bent into an L-shape with a long leg 10 60 and a short leg 62 with a downwardly turned edge 64 at the inner end. Two arms 66 are welded to the inside of the long leg, each mounted on its own shaft 68 fixed between the walls of the square tube.

15

The extension arms 70 and 72 are welded to the upper end of the arms 66. The arms 70, 72 of the two locking arms can be turned past each other as shown in Fig. 7.

The inner edges of these extension arms are shaped in the form of cam surfaces 74 and 76 communicating in the form of a cylinder 78 supported by an articulated arm 80 with a locking body, the cylinder and the articulated arm being in turn pivotally connected to a drive arm 82 pivotally supported at a center post.

The compression spring 86 is kept tensioned between the locking arms 48, 50.

When the locking arms are in their extended position as shown in Fig. 7, the spring 86 holds them in this position, which can be determined so that the lower edges 64 come into contact with the lower edges of the openings 52, 54. The drive arm 82 is retracted to a position above the top 25 of the column while causing the cylinder 78 to move to its free position. Instead of the edges 82 forming a stop, the arms 70, 72 may be brought into contact with the cylinder 78 when the splitting arms are fully turned out, with further protrusion limited by the cylinder 78. The end position of the operating arm in Figure 7 is limited by shoulders 86A on the inside of tube 32.

5

When the wire spool and the unwind crown are pushed onto the center column in its folded horizontal position according to Fig. 3, the drive arm 82 is in its unfolded position and the locking arms in its retracted neutral position according to Fig. 6, with the crown lower end 30 and upper end 28 shown in dotted lines.

Before the column 10 is turned up from its horizontal position, the arm 82 is moved to the locking position of Figure 7, when the shape of the cam surfaces 74, 76 is such that the cylinder 78 can be disengaged relatively easily, i.e. the manual force of the operating arm is relatively small. the drive arm is to be pivoted out of the position shown in Fig. 7 while the cylinder is to be pressed against the cam surfaces 74, 76, causing the locking arms to pivot against the action of the spring 86 to the neutral position of Fig. 6.

Figure 7 shows how the short arms 62 of the locking arms form the shoulders on the upper end of the unwinding crown.

Thus, the locking device is simple to implement, reliable and practical to use.

30

As can be seen from the above description, the wire spool 22A can be handled without a pallet. The reel can be handled during loading and unloading by rotating it along the ground. The horizontal coil can be easily moved to the correct position for placement on the horizontal column. The crown must be raised high enough to be pushed onto a horizontal column, which 90960 9 is then turned up to its working position by a hydraulic or pneumatic cylinder in which the crown is locked so that it cannot be pulled out of the column during unwinding.

5

Claims (2)

An apparatus for unwinding a metallic so-called packaging yarn from a yarn spool (22) on a vertical center column (10) pivotally mounted for lowering 5 to a horizontal position for receiving a wire spool and mounting it on a column and for raising the column thereafter in a vertical spool. with an unwinding crown (26) around the column at the upper end of the spool, the column consisting of a square tube 10 having diagonally projecting longitudinal flanges (34) to form four longitudinal grooves in which the crown is adapted to engage the grooves in the upper and lower guide arms prevent the crown from rotating relative to the column when the wire slides along the outer ring of the 15 crown, which guides the wire as it unwinds round by turn from the spool while the wire is pulled upwards, characterized in that the two opposite ends of the tube the wall (56, 58) has two substantially rectangular openings (52, 54) 20 at the upper end of the tube for lowering the two pivotally mounted locking arms (48, 50) from their neutral position, in which they are substantially retracted into the openings and allow the wire spool (22) to pass freely in both directions, in a lowered locking position, where they prevent the crown (26) from detaching from the column, 25 that a drive arm (82) is pivotally mounted at the top of the column, which in its retracted position is above the open top of the column and holds a locking member cooperating with the arms (80); 78) in a position that allows the arms to be lowered to their locking-30 position by a compression spring (86) coupled between the arms, and that lowering of the drive arm results in the locking member forcing the locking arms to retract to their neutral position. Device according to claim 1, characterized in that each locking arm (48, 50) consists of a substantially L-shaped plate arm, the long leg (60) of which in the neutral position of the locking arm is substantially retracted into the opening in the tube wall and extends at its lower end as a short leg ( 62), and that an upper arm (70, 76) is attached to the upper end of the long leg, the upper end of which has a cam surface supporting the locking member, that the locking member consists of a transverse, substantially cylindrical locking piece supported by a connecting arm of the operating arm, and that lowering the locking arm (82) out and thus the lifting of the locking piece results in the locking piece cooperating with the cam surfaces and raises the locking arms in the neutral position against the action of the spring.