WO1989001898A1

WO1989001898A1 - Device for automatically bundling coils

Info

Publication number: WO1989001898A1
Application number: PCT/EP1988/000766
Authority: WO
Inventors: Janusz Penschor; Norbert Huber
Original assignee: U.I. Lapp Kg
Priority date: 1987-08-29
Filing date: 1988-08-26
Publication date: 1989-03-09
Also published as: EP0383772A1; DE3728974A1; DK50890D0; DK50890A

Abstract

A device for automatically bundling coils with continuously fed binding wire (9) comprises essentially a feed device (21) for the binding wire; a cutting device (26) for cutting the binding wire; a deflection device (53) which moves relatively to the fixed coil for winding the binding wire around the coil and is provided with mutually movable guide jaws for selectively surrounding or releasing the binding wire; and a twisting head (27) which rotates about an axis along which it moves to and fro and is provided with a first channel for passage of the binding wire fed by the feed device, a second channel for receiving the binding wire after the latter is wound around the coil, and first and second clamping mechanisms for the binding wire associated with the first and second channel, respectively.

Description

Device for automatically tying bundles

The invention relates to a device for automatically tying bundles with endlessly fed binding wire.

It is known to provide coils of wire or the like as well as elongated coils of rod-shaped material with ties made of binding wire in order to hold together the individual wire coils of the coil or the individual components of the elongated bundle. Such bindings have hitherto mostly been produced by hand and in such a way that short, U-shaped pieces of binding wire are wrapped around the collar and then the free leg ends of the wire are twisted together, the latter either likewise by hand or happened with the help of a rotating device. Tying bundles in this way is cumbersome and time-consuming and entails high personnel costs.

It is an object of the invention to provide an automatically operating device, can be provided with a fixed setting time of endless binding wire supplied ^'quickly and easily with the aid of coils of wire, rod-shaped material or the like.

According to the invention, the object is achieved by a device which is characterized by the following features: a. a holding device for holding the federal government; b. a feed device for the binding wire; c. a cutter for cutting the binding wire; d. a deflection device movable relative to the fixed collar for guiding the binding wire around in a U-shape

- the federal government with d.e. two relatively movable guide jaws for optionally enclosing and releasing the binding wire and e. on. Twist head rotatable about an axis of rotation and slidable back and forth along this axis with e.a. a first channel to. Performing the binding wire fed by the feed device; e.b. a second channel for receiving the binding wire after passing it around the federal government and e.c. first and second, first and second, respectively

Channel associated clamping devices for the binding wire.

The following description of a preferred embodiment of the invention is used in conjunction with the accompanying drawings for further explanation. Show it:

Figure 1 is a plan view of a coil of wire with two ties and a label.

FIG. 2 shows a partially sectioned side view of a device for producing an annular collar with ties according to FIG. 1;

3 is a plan view of a feed device for binding wire;

4 shows a partially cut-away side view of a twisting head with a dash-dotted representation of a deflection device;

5 shows a rotatable and axially displaceable hollow shaft for mounting the twisting head from FIG. 5;

FIG. 6 shows a side view of the deflection device shown in broken lines in FIG. 4;

FIG. 7 shows a top view of the deflection device from FIG _. 6 and

8 shows a diagrammatic representation of another embodiment of a deflection device.

In Figure 1 is a. Ring collar 1 shown from wire. The collar 1 consists, in a known manner, of a plurality of circular wire windings 2 which together form the toroidal ring collar with an essentially circular cross-sectional area. The start of the wire 3 lies on the inside of the collar 1, is bent approximately radially outwards and at least partially inserted into the windings 2 of the collar 1, so that there is no risk of injury when handling the collar. The wire end 4 is located on the outside of the collar 1 in the vicinity of a binding 5 made of binding wire 9 which holds the collar together, the ends β of which are twisted in a conventional manner. The ring collar 1 is held together by two ties 5, the tie 5 lying on the right in FIG. 1 serves at the same time to hold a label 7. For this purpose, the label 7 has a hole 8 through which the binding wire 9 of the binding 5 is passed. The ring collar 1 shown in FIG. 1 can have different diameters, for example between approximately 20 and 50 cm. It can consist of metal, but also of plastic wire or other, relatively rigid material, in particular cables, ropes or the like.

FIG. 2 shows a side view of a device for producing a ring collar 1 according to FIG. 1. The essential parts and functions of this device are described below.

On a stationary machine frame M, which is only partially shown in FIG. 2, a shaft 11 is supported in a self-supporting manner, running from top to bottom and which is driven in rotation near its upper, supported end by a motor 12. At its lower, free end, the shaft 11 carries a hub 13, which in turn bears with a reel body 14 rotating in the horizontal plane. The reel body 14 comprises radially protruding sliding guides 15 from the central hub 13, for example in the form of guide rods of circular cross section, on which the winding jaws 16 can be pushed back and forth. The radial distance of these winding jaws 16 from the hub 13 determines the inner diameter of the annular collar 1. The winding jaws 16 each have a radially outwardly opening, U-shaped groove in which the annular collar 1 that forms is held.

With the lower, free end of the hub 13 and thus with the Reel body 14 is rotatable and cantilevered connected downwards to a circular cylindrical collecting core 17, onto which finished coils 1, detached from the winding jaws 16, can be pushed downwards. Such a finished collar 1, which is applied to the collecting core 17, is shown in cross section in FIG. 2 below. He is supported by flaps 18, which around fixed axes 19 with the help of a linkage 20 by a (not shown), for. B. pneumatic drive can be pivoted downwards and in their normal operating position (shown in FIG. 2) simultaneously hold the collecting core 17 non-rotatably, for which purpose the flaps 18 engage, for example, in corresponding cutouts in the jacket of the core 17. When the flaps 18, which support the finished collar 1, are pivoted downward, the collar 1 falls off from the collecting core 17 and reaches, for example, a transport device which conveys it out of the device.

The device described so far works in the following way: the beginning of a wire or the like to be wound into a ring bundle 1 is fed to the winding jaws 16 via a feed device known per se and clamped to one of these jaws. Then the motor An¬, by turning 12 of the reel body 14 set in rotation, so that the wire coils 2 are formed on the winding cheeks 16 and the annular collar ^"1 increases to the desired size. Closing of the reel body 14 is stopped again, and then the wire forming of the wire end 4, and a ^'s is cut new wire beginning 3 (Figure 1). This is followed by the preparation of 5 bindings from the binding wire 9, which is supplied over a roll 10 (Figure 2) and in yet in a descriptive manner, by means of a binding device, it is placed around the ring collar 1 held by the U-legs of the winding jaws 16 and twisted thereon. After the bindings 5 have been completed, the winding jaws 16 are displaced radially toward the hub 13 on their slide guides 15, so that the now bound ring collar 1 can be transferred to the collecting core 17 and supported on the flaps 18.

In the following, the already mentioned binding device for producing the bindings 5 surrounding the collar 1 is described in more detail. This device is not only suitable for coils that are produced with the help of the reel device described, it leaves. rather, generally use ring coils, regardless of how they are produced. In addition, this binding device is also suitable for the production of bindings on non-annularly closed strips, for example elongated bundles of rod-like material or the like.

Two binding devices are provided on the reel device for producing the coil bundles 1 according to FIG. 2, so that the two diametrically opposite bonds 5 can be produced simultaneously. These two binding devices are identical to one another, so that only one of these devices is described below.

The binding device first comprises a feed device 21 for the binding wire 9 fed via the roll 10. The feed device consists in a conventional manner of a drive motor 22 which drives a first feed roller 23 with a V-shaped outer peripheral surface via conventional gear means (Figure 3). Another roller 25 with a complementary V-shaped circumferential surface is biased against the roller 23 by means of a spring 24. The binding wire 9 runs between the rollers 23 and 25 and is pushed forward by the driven roller 23. The motor 22, which is preferably designed as an electric motor, can optionally be driven in one or the other direction of rotation, so that the binding wire 4 can be guided towards or away from the ring collar 1 held by the winding jaws 16 via the rollers 23, 25.

Below the feed device 21 for the binding wire 9, a cutting device 26 is provided for cutting off the binding wire. This cutting device can be of conventional design and is therefore not described in detail here ben. It is using a z. B. pneumatic drive device remote controlled.

A twisting head 27, which is shown in detail in FIG. 4, is arranged below the cutting _device 26. The twisting head 27 is mounted cantilevered at the lower end of a frame M schin rotatably supported in the M shaft 28 which is displaceable in circulation ^'via a motor 29 (Figure 2). As FIG. 5 shows, the shaft 28 is designed to be telescopic, so that the twisting head 27 is not only rotatable about the axis of rotation of this shaft, but can also be pushed back and forth along this axis. For this purpose, the shaft 28 comprises an outer hollow shaft 31 which is rotatably mounted on the machine frame M by means of bearings 32. A further shaft 33 carrying the twisting head 27 runs axially displaceably in the hollow shaft 31 and is connected in a rotationally fixed manner to the hollow shaft 31 by means of a spring 34. The spring 34 engages a radially extending groove 35 in the hollow shaft 31 and enables the axial up and down displacement of the twisting head 27 connected to the shaft 33. A grub screw 36 in the hollow shaft 31 interacts with the spring attached to the shaft 33 and limits the displacement path of the Twisting head 27 downwards.

A pressure-medium-actuated piston-cylinder unit 37, for example a pneumatic cylinder, is connected via a linkage 38 to a rotary bearing 39 which receives the shaft 33 in a rotating manner, but is axially fixed to this shaft. Thus, when the unit 37 is actuated, the shaft 33 and with it the twisting head 27 can be moved up and down.

As shown in FIG. 5, the shaft 33 is also designed as a hollow shaft. A pressure medium, in particular compressed air, can be introduced into the twisting head 27 through the central cavity of the shaft 33, in order to actuate a clamping device for the binding wire 9 to be described, if necessary.

As can be seen from FIG. 4, the twisting head 27 has a first channel 41 with a funnel-shaped insertion opening 42. The start of the binding wire 9 is inserted into this channel 41 by the feed device 21 after the twisting head 27 has been positioned in the correct position relative to the feed device 21 by a corresponding rotation of the shaft 28. Furthermore, the twisting head 27 has a second channel 43 which receives the binding wire 9 after it has been guided around the collar 1 in a manner to be described. The channel 43 also has a funnel-shaped opening 44 into which the binding wire after it is threaded around the waistband 1.

Both channels 41> 43 are provided with clamping devices in order to be able to clamp the binding wire 9 running through them. These clamping devices each comprise bushings 45 and 46, which each form part of the channels 41 and 43 with their inner bore. The bushes 45, 46 are displaceable transversely to the axis of the channels 41, 43. As a result of this displacement, the binding wire 9 can be clamped in the channels 41, 43.

As shown in FIG. 4, the two bushes 45, 46 are connected to a toggle lever arrangement 47, which comprises a block 49 which is axially displaceable in the twisting head 27 and is prestressed by a spring 48 (upwards in FIG. 8). The spring 48 biases the block 49 and thus the bushes 45, 46 into their non-clamping position. The block 49 is connected on its side opposite the spring 48 to the piston rod 51 of a pressure medium cylinder 52, to which the pressure medium is supplied via the already mentioned inner cavity of the shaft 33 (FIG. 5). When the cylinder 52 is actuated, the block 49 is moved against the action of the spring 48 (downward in FIG. 4), so that the bushes 45, 46 assume the clamping position shown in FIG. 4, in which the binding wire 9 in the two channels 41, 43 is clamped.

The respective inlet and outlet openings of the bushings 45, 46 are, as can be seen from FIG. 4, widened in a funnel shape, so that the binding wire 9 which is clamped after the bushings have been displaced is not sheared off but merely clamped in place. In addition, the piece connected to the socket 45 is of the channel 41 also expanded considerably in a funnel shape in order to facilitate the passage of the inserted binding wire 9 from the socket 45 into the subsequent channel piece.

As can further be seen from FIG. 4, the bushing 45 has a considerable, for example twice the inner diameter than the bushing 46. This is for the following reason: if a pressure p. is applied to the block 49, both bushes 45, 46 move laterally out of the axis of the channels 41 and 43, respectively. Because of the small inner radius of the socket 46 at the transition points of this socket into the duct 43, the part of the binding wire 9 running through this duct is immediately clamped. However, due to the larger inside diameter of the socket 45, the binding wire is not yet clamped at the location of this socket instead of. Therefore, the binding wire 9, initially loosely guided around the ring collar 1, after it has been tightened by the bushing 46 in the duct 43, can be pulled back through the duct 41 and the bushing 45 by appropriate actuation of the motor 22 of the feed device 21 and thereby fixed be stretched around the collar 1. Only when a higher pressure p _{2 is} applied by the cylinder 52 does the bush 45 (and possibly also the bush 46) move a little further, so that the binding wire 9 is now also clamped in the channel 41. If the binding wire 9 entering the channel 41 is cut off by the cutting device 26 and the twisting head 27 is rotated by the motor 29, the two ends of the binding wire 9 guided around the collar 1 can be twisted in the channels 41, 43 what will be described in more detail below. The aforementioned U-shaped routing of the binding wire 9 passing through the channel 41 around the ring collar 1 is served by a deflecting device 53, compare FIGS. 4, 6 and 7. This device has a U-shaped one, compare in particular the dash-dotted illustration in FIG Guide channel 54 with inlet funnel 55. The deflecting device 53 is positioned such that on the one hand it encloses the ring collar 1 and on the other hand with its inlet funnel 55 it lies exactly under the outlet opening of the channel 41 and with its outlet end 56 under the funnel-shaped inlet end 44 of the channel 43. If the binding wire 9, which is initially advanced in a straight line, is now pushed out of the channel 41 through the U-shaped guide channel 54 of the deflection device 53, it is bent into a U-shape and steered around the ring collar 1, whereupon it flows into the channel 43 enters, over the exit end of the channel 43 is a z. B. electro-optical sensor 57 (see also FIG. 2) ^' arranged, which senses the beginning of the binding wire 9 emerging from the channel 43 and switches off the feed device 21 of the binding wire 9.

In order to free the binding wire guided around the collar 1 by the deflection device 53 from this device and to clamp it around the collar 1, the deflection device 53 consists of two U-shaped guide jaws 58, 59 which are movable relative to one another, see FIG. 6 and 7. In each of the guide jaws 58, 59, see FIG. 7, a U-shaped groove 60 and 61 is formed, which form the closed guide channel 54 when the jaws are pushed together. The guide jaws. are for optionally enclosing and releasing the binding wire 9 relative to one another transversely to the binding formed by the U-shaped wire defined plane movable (compare the double arrow B in Figure 7). When the guide jaws 58, 59 assume their open position according to FIGS. 6 and 7, the binding wire 9 is released from the grooves 60, 61 and can be placed firmly around the collar 1 by appropriate tightening.

It. has proven to be advantageous to give the guide channel an angular cross-sectional shape rather than a rounded one, because this reduces the friction of the binding wire 9 passed through. The cross-sectional shape of the guide channel 54 is therefore preferably limited by straight lines. It is also possible to form the U-shaped grooves 60 or 61 only in one of the jaws 58 or 59, and to give the respective opposite jaw a smooth surface, this smooth surface then the opposite groove after the jaws 58 have been brought together 59 covers to form a closed guide channel 54.

The two guide jaws 58, 59 are in a known manner with a, for. B. hydraulic drive motor 62 connected, which either pushes these jaws together or brings them together.

In order to be able to position the deflection device 53 precisely in relation to the ring collar 1, this device is arranged together with its drive motor 62 on a frame 63 which can be moved vertically up and down on the machine frame M by means of a pressure medium cylinder 64. The deflection device 53 can be pushed back and forth horizontally on the frame 63 by means of a further pressure medium cylinder 65. Before performing the Binding with the binding wire 9, the winding jaws 16 of the reel body 14 are adjusted so that the deflection device 53 can be inserted exactly into the space between two adjacent winding jaws 16. The deflection device 63 is finally pushed upwards by the cylinder 64 so that it surrounds the ring collar held by the winding jaws 16, its inlet and outlet ends 55, 56 immediately below the outlet ends of the channels 41, 43 accordingly positioned twisting head 27 are.

After the collar 1 has been produced on the winding jaws 16 in the manner described at the outset, the binding 5 is produced with the aid of the endlessly fed binding wire 9 in the following manner:

The twisting head 27 and the deflecting device 53 are positioned relative to the feed device 21 such that the advanced binding wire 9 can be inserted into the first channel 41 of the twisting head, can be deflected in a U-shape around the collar 1 by the deflecting device and into the second channel 43 of the twisting head 27 can be initiated. The binding wire 9 is then inserted into the channel 41 of the twisting head 27 and the deflecting device 53 by switching on the feed device 21 and then introduced into the channel 43 of the twisting head 27. When the sensor 57 detects the beginning of the binding wire 9 emerging from the channel 43, the feed device 21 is switched off. The binding wire is then clamped in the channel 43 by a corresponding displacement of the socket 46.

Now the guide jaws 58, 59 of the deflecting device opened so that the binding wire can emerge laterally from the guide channel 54 formed by the grooves 60, 61. Subsequently, the feed device 21 of the binding wire is actuated against the original feed direction, so that the binding wire lies directly and firmly against the collar 1. The binding wire is then also clamped in the channel 41 of the twisting head 27 with the aid of the bushing 45. Subsequently, the binding wire is cut off by the cutting device 26 between the feed device 21 and the twisting head 27, whereupon the twisting head 27 is moved towards the collar for the purpose of partial relaxation of the binding wire 9 which is tight against the collar 1. Now the twisting head is set in rotation in order to cross the two binding wire ends running between collar 1 and twisting head 27. The twisting head is then briefly stopped again and moved away from the collar 1 for the purpose of tensioning the binding wire 9. These axial movements of the twisting head 27 take place with the aid of the piston-cylinder unit-r.ß7 (FIG. 5).

Finally, in order to generate the necessary number of twists of the binding wire, the twisting head is put into circulation and then brought to a standstill, whereupon the deflecting device 53 is removed from the twisting head 27 and from the ring collar and the latter is detached from the winding jaw 16 and onto the collecting core 17 is transferred.

It is important to bring the twisting head a little closer to the ring collar before crossing the two binding wire ends for the first time. If this is not done, there is a risk that the binding wire will become twisted during the first half rotation of the twisting head is overstretched and tears.

Before the ring collar now provided with the ties 5 is transferred from the jaws 16 to the collecting core 17, the two small devices, namely the bushes 45, 46 in the channels 41, 43 of the twisting head 27 are of course released again. When the ring bundle 1 is detached from the winding jaws 16, the two binding wire ends originally clamped in the channels 41, 43 then remain on the ties 5. These are cut off with the aid of scissors 68 (FIG. 2) known per se, in the upper, twisted area of the binding wire, so that in the end the ones shown in FIG. 1 are twisted. Ends 6 remain, which are then folded over towards the collar.

In order to attach the label 7 provided with the hole 8 to the binding 5 already mentioned in connection with FIG. 1, a label driver 66 known per se, for example in the form of a with a vacuum source connected suction head, which, when the deflection device 53 is moved horizontally, runs past the label magazine 67 fixedly arranged on the machine frame M with the aid of the cylinder 65 and removes a label 7 on the underside thereof in a manner known per se by pulling it off. The label 7 is automatically positioned so that its hole 8 lies exactly above the outlet opening 56 of the deflecting device 53, so that the beginning of the binding wire. 9 when leaving the first channel 41 in the twisting head 27 this hole 8 is threaded through.

FIG. 8 shows a modified embodiment of a deflection device 73. This device comprises a first, U-shaped jaw 74 with an inside, U-shaped groove 75 triangular cross-section. A second guide jaw 76 is movable in the direction of the double arrow C and, when inserted, covers the open groove 75 in order to form a closed guide channel for the binding wire.

Claims

P a t e n t a n s r u c h e

Device for automatically tying bundles with endlessly fed binding wire, characterized by the following features: a. a holding device (14, 15, 16) for holding the federal government (1); b. a feed device (21) for the binding wire (9); c. a cutting device (26) for cutting the binding wire (9); d. a deflection device (53) movable relative to the fixed collar (1) for U-shaped guiding of the binding wire (9) around the dert collar (1) with two guide jaws (58, 59) movable relative to one another for optionally enclosing and releasing the Binding wire (9); and e. a twisting head (27) rotatable about an axis of rotation and slidable back and forth along this axis, with a first channel (41) for passing through the binding wire (9) fed by the feed device (21); eb a second channel (43) for receiving the binding wire (9) after guiding it around the collar (1) and ec first and second clamping devices (45, 46) assigned to the first and second channel (41, 43) the binding wire (9).

2. Device according to claim ^" 1, characterized in that the feed device (21) can be driven either in the feed direction and counter to the feed direction of the binding wire (9).

3. Device according to claim 1, characterized in that

. the guide jaws (58, 59) for releasing the binding wire (9) can be moved transversely to the plane defined by the U-shaped bent binding wire.

4. The device according to claim 3, characterized in that in at least one guide jaw (58, 59) a U-shaped

Groove (60, 61) is formed which, after the jaws (58, 59) have been brought together, is covered by the other jaw in order to form a closed guide channel (54).

5. Apparatus according to claim 4-, _^ characterized in that a U-shaped groove (60, 61) is formed in both guide jaws (58, 59).

6. The device according to claim 4, characterized in that the U-shaped groove (60, 61) has a cross-sectional shape limited by straight lines.

7. The device according to claim 1, characterized in that on the deflection device (53) a driver (66) for a label (7) with a hole (8) is arranged, which the label

(7) positioned on the twisting head (27) in such a way that the binding wire (9) supplied penetrates the hole (8).

8. The device according to claim 7, characterized in that a label magazine (67) is provided, from which the catch (66) removes the label.

9. The device according to claim 1, characterized in that for clamping the binding wire (9), the channels (41, 43) in the twisting head (27) are partially gebil det of sockets (45, 46) which are displaceable transversely to the binding wire (9) are.

10. ^' Method for controlling a device according to one of the preceding claims, characterized by the following steps: a. the twisting head and the deflection device are so. positioned to the feed device, that the advanced binding wire can be inserted into the first channel, can be deflected in a U-shape around the collar by the deflection device and can be introduced into the second channel; b. the binding wire is inserted into the twisting head and the deflecting device by actuating the feed device; c. the second clamping device assigned to the second channel is actuated; d. the guide jaws of the deflection device are opened to release the binding wire; e. the feed device of the binding wire is actuated against the feed direction, so that the binding wire lies firmly against the collar; f. the first clamping device assigned to the first channel is actuated; G. the binding wire is cut off by the cutting device between the feed device and the twisting head; H. the twisting head is moved towards the collar for partial relaxation of the binding wire lying against the collar; i. the twisting head is rotated around the two running between the collar and the twisting head

Cross wire ends; k. the twisting head is then stopped again and moved away from the collar for the purpose of tensioning the binding wire; 1. the twisting head is circulated in order to generate the necessary number of twists of the binding wire and then brought to a standstill and m. the deflection device is removed from the twisting head and the collar is removed from the holding device.