EP0380930B1 - Suspended transport system - Google Patents

Abstract

There is described a suspended transport system for conveying bobbins (1) to predetermined bobbin positions (RSP) in a spinning machine, especially a ring spinning machine, which has a conveyor stage (3) which leads along the predetermined bobbin positions (RSP) and on which a driven conveyor train (4) equipped at least with a plurality of bobbins (1) can be transported. To transfer individual bobbins (1) from the conveyor stage (3) to the predetermined bobbin positions, a device (14, 14') movable along the spinning machine is provided. For the transfer of bobbins (1) into the ring spinning machine which can be carried out quickly and without difficulty, there is a bobbin carriage (14, 14') which is movable together with the conveyor train (4) and runs parallel to the conveyor stage (3) and on which is arranged a separating and guiding device (16, 30, 32) for transferring a separated bobbin (1) from the conveyor train (4) into a predetermined bobbin position (RSP). <IMAGE>

Description

The invention relates to a overhead conveyor system of the type explained in the preamble of claim 1.

Such a overhead conveyor system is known from DE-OS 35 36 702. The known overhead conveyor system contains a bobbin changing device that can be moved on the floor along a ring spinning machine and a suspended conveyor section for feeding full bobbins. The bobbin changing device is moved to a position in which an expired bobbin is to be exchanged for a full bobbin. A sensor arranged on the bobbin changing device determines whether there is a full bobbin in a position suitable for transfer on the conveyor train. If this is the case, a gripper arm extends, grips the full bobbin, releases it from the conveyor train and hangs it into the free position in the ring spinning machine. If no full bobbin can be found on the conveyor train, the sensor actuates a drive which engages in the conveyor train and drives the conveyor train until a full bobbin is in the position favorable for transfer. In the known device, however, a large number of control processes which are to be coordinated with one another in terms of their time and place, which lead to a relatively complicated construction and control of the known device, are required. In addition, the bobbin changing process is also relatively time-consuming, especially when the bobbin changing device is only a full bobbin must fetch. During the transfer process, the conveyor train must also stand still, since the gripper arm can only be effective if the full spool is precisely positioned. However, this makes it impossible, for example, to have two bobbin changing devices work on the same machine.

The invention is therefore based on the object of developing a overhead conveyor system with a device for transferring spools in a structurally simple manner in such a way that the spool change can be carried out quickly and precisely.

The object is achieved by the characterizing features of claim 1.

The bobbin carriage, which can be moved together with the conveyor train, ensures that a full bobbin is always where it is necessary to change. With the device according to the invention, it is also possible to continuously guide the conveyor train and the coil carriage around the machine. With the separating and guiding device according to the invention, the coils can be transferred from the movement of the conveyor train to the empty coil positions without, for example, the conveyor train having to be stopped.

The joint movement of conveyor train and bobbin wagon can be achieved particularly expediently if the bobbin wagon is dragged along by the driven conveyor train.

This funkton of entraining can be done in a structurally simple manner by the specified in claim 3 Towing device must be met.

Advantageously, the towing device, according to claim 4, contains a spring-loaded rocker arm, which is normally in contact with the conveyor train.

By means of the stripping device specified in claim 5, which can be brought into and out of engagement with the coil, separation and transfer of the coils is achieved in a structurally simple manner.

The bobbin carriage is signaled by the stop specified in claim 6 that an empty bobbin position is to be filled.

A first embodiment of a coil carriage according to the invention is described in claims 7 to 9. In this exemplary embodiment, the stop actuates a latching device which restrains the coil carriage behind the movement of the conveyor train and thereby initiates the separating and guiding function.

In a further exemplary embodiment specified in claims 10 to 14, the rocker arm is released directly from the engagement with the conveyor train by the stop, the movement of the bobbin carriage being used for separating and transferring the bobbins.

The invention is particularly advantageous to use in spinning machines in which, according to claim 15, the spool positions are arranged on a transverse rail located in the spinning machine.

The design of the stop according to claim 16 is particularly advantageous because the stop itself can be reset to its inactive position by the coil transferred into the coil position.

If the strip is loaded by a spring according to claim 17, it can be designed such that the stop jumps into its effective position as soon as the corresponding coil position is empty.

A particularly simple construction and control option results if, according to claim 18, the movement of the separating and guiding device for separating and / or transferring the coils is derived from a relative movement of the conveyor train to the coil carriage.

Claims 19 to 24 describe a particularly preferred holder for coils, which, due to its two-part design, is particularly suitable for use in the overhead conveyor system according to the invention, since a coil provided with such a holder separates from the conveyor train in a structurally simple manner and into an empty coil position in the Spinning machine can be transferred. However, the holder for coils according to the invention is also suitable for other conveyor systems where, for example, it is important that the coils can be quickly released from a conveyor train without the coil losing its ability to be conveyed on a rail.

• Fig. 1 einen Ausschnitt aus dem erfindungsgemäßen Hängefördersystem in einem ersten Ausführungsbeispiel,
• Fig. 2 eine schematische, vergrößerte Darstellung von unten des Spulenwagens aus Fig. 1,
• Fig. 3 die Spulenaufhängung am Förderzug,
• Fig. 4 die Spulenaufhängung an der Spulenposition,
• Fig. 5 die Draufsicht auf eine Rastvorrichtung des Spulenwagens nach Fig. 1,
• Fig. 6 die Seitenansicht aus Fig. 5,
• Fig. 7 eine schematische Darstellung eines weiteren Ausführungsbeispieles eines Spulenwagens in Draufsicht, und
• Fig. 8 die Seitenansicht des Spulenwagens nach Fig. 7.

Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. Show it:

• Fig. 1 shows a section of the invention Overhead conveyor system in a first embodiment,
• FIG. 2 shows a schematic, enlarged illustration from below of the bobbin carriage from FIG. 1, FIG.
• 3 shows the coil suspension on the conveyor train,
• 4 shows the coil suspension at the coil position,
• 5 shows the top view of a latching device of the bobbin carriage according to FIG. 1,
• 6 shows the side view from FIG. 5,
• Fig. 7 is a schematic representation of another embodiment of a coil carriage in plan view, and
• 8 shows the side view of the bobbin carriage according to FIG. 7.

In Fig. 1, a part of a overhead conveyor system can be seen in a schematic representation, which is used for inserting bobbins 1 into the creel of a ring spinning or twisting machine or the like. The machine itself is not shown, but can be of any known type. The gate of the ring spinning machine has cross rails 2, only one of which is shown. In the exemplary embodiment shown, each of the cross rails 2 contains two spinning spool positions SSP1 and SSP2 and a reserve spool position RSP. Each of the cross rails 2 has a free end 2a on the side facing away from the center line, not shown, of the spinning machine. A conveyor section 3 runs around the spinning machine, leading to all free ends 2a of the cross rails 2 has the same vertical and horizontal distance. The conveyor section 3 consists of rails of conventional design. At least one conveyor train 4 runs on the conveyor track 3 and is driven by a drive (not shown), for example a friction belt drive. In the exemplary embodiment shown, the conveyor train 4 consists of operating means 5 running on the rail of the conveyor section 3, which are connected to one another by a crossbar 6. On the crossbar 6, the coils to be conveyed are suspended via brackets. For this purpose, a first holding part in the form of a guide piece 7 is fastened to the crossbar for each of the coils 1 to be conveyed in the conveyor train 4. Each guide piece 7 releasably receives a second holding part in the form of a slider 8, on which one of the usual coil holders 9 is fastened.

As can be seen in connection with FIG. 3, the slider 8 extends with a neck area 8a into a recess 7a of the guide piece 7 from below and overlaps with correspondingly designed lateral bars 7b of the guide piece 7 arranged on parallel arms, lateral bars 8b, so that it is secured against falling down. The arms, the recess 7a and the strips 7b, 8b run parallel to the conveying direction. The slider 8 furthermore has a substantially circular bore 8c which extends through the entire slider 8 in the direction of the conveying path 3. In order to lock the slider 8 and the guide part 7 against one another in the conveying direction as well, a securing pin 10 is arranged on the guide part 7, which extends into a slot in the slider 8 which also extends through the entire slider 8. The locking pin 10 is with a Locking cone 11 is provided, which is located in its normal position, loaded by a spring 12, inside a conical recess of the slider 8 in the butt region between the guide part 7 and the glider 8 and bridges the butt region in a locking manner.

As shown in FIG. 1, a further rail path 13 is provided in addition to and parallel to the conveyor track 3, on which a coil carriage 14 runs in a hanging arrangement. As can also be seen in FIG. 2, a drag device in the form of a drag lever 15, a separating and guiding device with a stripping device in the form of a stripping lever 16 and a rail piece 17 are fastened to the coil carriage 14. The coil carriage 14 also carries the latching device 18 shown in FIGS. 5 and 6, which, however, has been omitted in FIG. 1 for reasons of clarity. The rocker arm 15 engages the conveyor train 4 and there on the guide part 7. Although it is rotatably mounted on the bobbin wagon 14, it is biased by a spiral spring 19 such that the bobbin wagon 14 is dragged along when the conveyor train 4 is driven.

The fulcrum of the rocker arm 15 is connected to the scraper lever 16 via a gear mechanism 20, only shown schematically, in such a way that the scraper lever can be carried with a ratio of 1.6: 1 to 2: 1, ie up to twice the pivoting angle, when the rocker arm 15 moves . The scraper lever 16 is bent downward and carries at its free end a pivotably mounted and spring-loaded scraper pawl 21, which can engage the slider 8 of the spool 1 when the scraper lever 16 is pivoted in the direction of arrow A. When pivoting in the direction of arrow B, the pawl can 21 are pressed in the direction of the pivot point, so that the stripping lever 16 can slide past the slider 8 of a subsequent coil.

The rail section 17 of the coil carriage 14 has a cross section which is suitable for insertion into the bore 8c of the slider 8, ie in the illustrated embodiment the rail section 17 has a circular cross section and is fastened to the coil carriage 14 with the aid of a carrier 17a. The rail piece 17 is arranged on the coil carriage 14 in such a way that it is to be aligned with each of the free ends 2a of the cross rails 2 when the coil carriage 14 is moving. Appropriately, the cross rail 2, as shown in FIG. 4, has a circular profile which is adapted to the rail section 17 and has a support pointing upwards. From the free end, a slot 22 is provided in the underside of the cross rail 2, in which a bar 23 is slidably received. The bar 23 is loaded by a tension spring 24 in the direction of the free end 2a of the cross rail 2, so that the bar 23 projects with a substantially relaxed spring 24 in a region 23a serving as a stop over the free end 2a of the cross rail 2 and into the Path of the bobbin carriage 14, ie its locking device 18, protrudes. Each of the bobbin positions SSP1, SSP2 and RSP is characterized by a stop 25a, 25b and 25c on the bar 23, the stops 25a and 25b of the two spinning bobbin positions pointing in the direction of the longitudinal center line of the spinning machine. The stop 25c of the reserve spool position, however, faces away from the longitudinal center line of the spinning machine. The spring 24 is relatively weak, so that it can move the bar 23 alone but not together with the coils.

5 and 6 show, the latching device 18 has a pivot lever 26 which moves a stop block 27 transversely to the direction of travel of the bobbin wagon 14 in such a way that it abuts the free end 2a of the cross rail 2. This process is shown in FIG. 5 for clarification in two processes spaced apart from one another in time. As the lower part of FIG. 5 shows, the bar 23 projects with the stop 23a into the region of the pivot lever 26 (dashed position of the pivot lever), engages an extension 26a of the pivot lever 26 and presses it about its axis of rotation 26b in such a way that that the received in a slot 28 of the stop block 27, rear extension 26c of the pivot lever 26 presses the stop block 27 in the position shown in the upper part of FIG. 5. If the stop block 27 then strikes the free end 2a of the cross rail 2, the stop 23a is of course, as shown in FIG. 6, in a recess in the rail section 17.

When the stop block 27 stops on the cross rail 2, the bobbin carriage 14 is restrained against the movement of the conveyor train 4; Coil carriage 14 and conveyor train 4 thus move relative to each other. However, the conveyor train 4 continues to press on the rocker arm 15 and sets the separating and guiding function in motion by deflecting it in the direction of the arrow C and counter to the force of the spring 19. At the same time, the rail piece 17 dips into the bore 8c of the slider 8 and pushes the locking pin 10 with the locking cone 11 up there, possibly with the aid of a not shown, arranged on the rail piece 17, so that slider 8 and Guide part 7 are unlocked. The movement of the rocker arm 15 is also transmitted to the transmission 20, so that the scraper lever 16 is moved in the direction of arrow A, its pawl 21 rests on the slider 8 and this together with the coil 1 on the rail piece 17 and from there on pushes the free end 2a of the cross rail 2. When pushed onto the free end 2a, the slider 8 comes into contact with the stop 25c of the bar 23 and, when transferred to the reserve coil position RSP, moves the bar 23 such that the stop 23a is pushed completely back into the slot 22.

The rocker arm 15 has now been pivoted so far from the conveyor train 4 that it comes out of the system with the conveyor train 4. Under the action of the spring 19, the rocker arm 15 pivots in the direction of arrow D back into the drag position shown in FIG. 2 and comes into contact with a guide part 7 of a subsequent coil. Via the gear 20, the pivoting back movement is transmitted to the stripping lever 16, which thus also returns in the direction of arrow B to its ineffective position shown in FIG. 2. During the movement in the direction of arrow B, the offset of the stripping lever 16 engages with the rear end 26c of the pivoting lever 26 of the latching device 18, as a result of which the pivoting lever 26 is pivoted back into its starting position shown in dashed lines in FIG. 5 and the stop block 27 is withdrawn. The bobbin wagon 14 can thus be dragged again by the conveyor train 4 to the next free bobbin position.

If one of the bobbins is spun in the spinning bobbin positions SSP 1 and SSP 2, this is done manually or automatically away. The bobbin hanging on the reserve bobbin position is brought to a spinning bobbin position and the fuse is attached. The coil hanging on the reserve coil position is tilted so that the slider 8 is released from the stop 25c. As a result, the tension spring 24 is able to push the bar 23 with the stop 23a out of the free end 2a of the cross rail 2 so that the reserve spool position can be occupied again the next time the conveyor train 4 and the spool carriage 14 pass through. If the conveyor train 4 is empty, its drive direction is reversed so that it can be moved to a loading station or back to the flyer without taking the bobbin wagon 14 with it.

A further exemplary embodiment of the invention is shown schematically in FIG. 7 in chronologically successive states. The conveyor section 3, the conveyor train 4, the cross rail 2 and the further rail path 13 for a coil carriage correspond to the configuration according to FIGS. 1 and 3. The stop 23a can also be designed analogously to the first exemplary embodiment, but, as shown, can be upper and lower lie outside the cross rail 2 and must be operated manually. The coil carriage 14 ', however, has a different separating and guiding device. It contains a turntable 30, which is provided with receiving grooves 31 on its circumference. Two receiving grooves 31a and 31b, which are offset by 180 ° relative to one another, are preferably provided. The receiving grooves 31 are designed such that a slider 8 can be gripped below the bore 8c. The turntable 30 is driven in rotation by a drive (FIG. 8). A rocker arm 32 and a scraper lever 33 are again provided, which are transverse to the conveying direction of the conveyor train 4 are arranged in a sliding guide on the coil carriage 14 ', independently of the turntable 30. The rocker arm 32, like the rocker arm 15 in the first embodiment, engages the conveyor train 4 in such a way that the bobbin wagon 14 'can also be towed. In its drag position, the rocker arm 32 is loaded by a spring 34. The scraper lever 33 also engages on the side pointing forward in the direction of travel, but on the slider 8. Rocker arm 32 and scraper lever 33 are connected to one another via a linkage 35. The linkage 35 includes a double-sided lever 36 which is pivotally attached to the bobbin carriage 14 '. One lever arm of the double-sided lever 36 is connected to the stripping lever 33 and the other lever arm to the rocker arm 32. The spring 34 engages on the lever arm of the double-sided lever 36 connected to the rocker arm 32 and loads this lever arm in the direction of the conveying path 3. An actuating lever 37 is also pivotably mounted on this lever arm and has a control surface 38 for abutment against the stop 23a .

As shown in FIG. 8, the turntable 30 is connected via an axis to a pinion 39 which meshes with a toothed rack 40 which is arranged in a fixed manner with respect to the bobbin carriage 14 'and the conveyor train 4. If the bobbin carriage 14 'is dragged along with the movement of the conveyor train 4, the pinion 39 rolls on the rack 40 and rotates the turntable 30 relative to the conveyor train 4 in a precisely defined manner.

If the control lever 37 strikes with its control surface 38 on a stop 23a projecting beyond the free end 2a of the cross rail 2, the control lever 37 is pivoted about its pivot point and takes the double-sided lever 36 against the action of the spring 34 with. As a result, the rocker arm 32 is withdrawn from its contact with the conveyor train. At the same time, by pivoting the double-sided lever 36, the stripping lever 33 is brought into abutment on the side of the holder of the holder which points in the conveying direction and is located in a receiving groove 31. This coil is separated from the conveyor train 4, so that it can be taken away from the rotating turntable 30. At the same time, the bobbin carriage 14 'was also dragged in the movement of the conveyor train 4 by the abutment of the stripping lever 33, so that the control surface 38 moves along the stop 23a. Due to the increasing distance of the control surface 38 from the free end 2a of the cross rail 2, the stop 23a on the control surface 38 reaches a point at which the adjusting lever 37 pivots again into the normal position shown in FIG. 7. The stripping lever 33 retracts from its contact with the spool 1 so that it can be taken along during the movement of the turntable 30. The rocker arm 32 rests on the conveyor train 4, so that the bobbin wagon 14 'is now dragged again via the rocker arm 32. 7, has completed a rotation of almost 180 °, the free end 2a of the cross rail 2 engages in the bore 8c of the gripper 8 of the coil 1 located in the receiving groove 31a. If the turntable 30 continues to rotate to complete a full 180 ° rotation, the edge of the receiving groove 31a pushes the spool even further onto the transverse rail 2, the stop 23a possibly being able to be reset at the same time.

In a modification of the described and drawn embodiment, for example, the stop can also be set manually when the operator has removed the spool from the reserve position. It is also possible to drive the coil carriage via a common drive with the conveyor train or to derive the drive movement of the coil carriage in another way from the movement of the conveyor train. The overhead conveyor system according to the invention, as described in the exemplary embodiment, is particularly advantageously suitable for transporting supply spools from the flyer into a ring spinning machine. However, it is also suitable for other, similar applications. Furthermore, transverse rails do not necessarily have to be provided; the suspension conveyor system described can also be used successfully for filling a reserve position in the case of fixed spool positions.

Claims (24)

1. Suspended transport system for transporting bobbins (1) to predetermined bobbin positions (RSP) in a spinning frame, in particular a ring spinning frame, with a transport track (3) which runs along the predetermined bobbin positions (RSP) and on which at least one driven conveyor train (4) loaded with a plurality of bobbins can be transported, and with a device (14, 14') which can be propelled along the spinning frame for transferring individual bobbins (1) from the transport track (3) to the predetermined bobbin positions (RSP), characterised in that the bobbin transfer device has a bobbin bogie (14, 14') which can be propelled together with the conveyor train (4), parallel to the transport track (3), and on which a detaching and guiding device (16, 30, 32) is arranged, for transferring a detached bobbin (1) from the conveyor train (4) to a predetermined bobbin position (RSP).
2. Suspended transport system according to Claim 1, characterised in that the bobbin bogie (14, 14') can be drawn by the conveyor train (4).
3. Suspended transport system according to Claim 2, characterised in that the bobbin bogie (14, 14') is provided with a drawing device (15, 32) which can be shifted into and out of contact with the conveyor train (4) for respectively drawing and releasing the bobbin bogie (14, 14').
4. Suspended transport system according to Claim 3, characterised in that the drawing device (15, 32) has a draw arm which is loaded by a spring (19, 34) causing it to adopt the drawing position.
5. Suspended transport system according to one of Claims 1 to 4, characterised in that the detaching and guiding device has a stripping device (16, 33) which can be shifted into and out of engagement with the bobbin (1) for transferring a bobbin (1) which is to be detached from the conveyor train (4) to a vacant bobbin position (RSP).
6. Suspended transport system according to one of Claims 1 to 5, characterised in that, for a vacant, predetermined bobbin position (RSP), a stop (23a) projecting into the way of the bobbin bogie (14, 14') is provided.
7. Suspended transport system according to Claim 6, characterised in that a catch (18) on the bobbin bogie (14) can be actuated by the stop (23a) to detain the bobbin bogie (14) with respect to the movement of the conveyor train (4).
8. Suspended transport system according to one of Claims 1 to 7, characterised in that the bobbin bogie (14) has a rail (17) to receive a holder component (8) fitted to the bobbin (1).
9. Suspended transport system according to one of Claims 5 to 8, characterised in that the stripping device (16) is connected to the drawing device (15) by a gear (20) and can be pivoted by the motion of the drawing device (15).
10. Suspended transport system according to one of Claims 1 to 6, characterised in that the stripping device (33) is connected to the drawing device (32) by a linkage of bars (35).
11. Suspended transport system according to Claim 10, characterised in that the bar linkage (35) is designed so that when the stop (23a) is engaged the linkage (35) can be deflected by the stop (23a) in such a way as to allow the drawing device (32) to be disengaged from the conveyor train (4) and the stripping device (33) to be brought into engagement with the bobbin (1).
12. Suspended transport system according to one of Claims 10 and 11, characterised in that the detaching and guiding device has a turntable (30) with at least one receiver (31 a) for a boboin (1), which is capable of rotating as the conveyor train (4) advances.
13. Suspended transport system according to Claim 12, characterised in that the turntable (30) is connected to a pinion (39) meshing with a toothed rack (40).
14. Suspended transport system according to Claim 12, characterised in that the receiver comprises a recess (31) formed in the periphery of the turntable (30), each such recess (31) receiving one of the bobbins (1) as the turntable (30) rotates.
15. Suspended transport system according to one of Claims 1 to 14, characterised in that the bobbin positions (RSP, SSP1, SSP2) are located on a transverse rail (2) in a spinning frame.
16. Suspended transport system according to one of Claims 6 to 15, characterised in that the stop (23a) is arranged on a slide bar provided at the predetermined bobbin position (RSP), the said bar having a stop face (25c) for the bobbin (1) to shift the stop out of the way of the bobbin bogie (14, 14') upon transfer of the bobbin (1) to the predetermined bobbin position (RSP).
17. Suspended transport system according to Claim 16, characterised in that the bar (23) is acted on by a spring (24) pushing it into the way of the bobbin bogie (14, 14').
18. Suspended transport system according to one of Claims 1 to 17, characterised in that the detaching and/or transfer movement is derived from a motion of bobbin bogie (14, 14') or conveyor train (4).
19. Holding device for bobbins on a carrier of a suspended transport system, in particular according to one of Claims 1 to 18, characterised by a first holder component (7) connected to the carrier (5, 6) a second holder component (8) connected to the bobbin (1) and a releasable coupling (7b, 8b) between the first and second holder components (7, 8).
20. Holding device according to Claim 19, characterised in that the coupling (7b, 8b) has at least one engaging surface on each holder component (7, 8) with the engaging surface on the second holder component (8) overlapping the engaging surface on the first holder component (7).
21. Holding device according to Claim 19 or 20, characterised in that a locking device (10, 11, 12) with a projection (11) arranged on one of the holder components (7), capable of moving against the action of a spring (12), and of being brought into engagement with a recess in the other holder component (8), is provided for locking the first and second holder components (7, 8).
22. Holding device according to Claim 21, characterised in that a locking pin (10), fixed to the projection (11), is provided, for automatically releasing the locking device.
23. Holding device according to one of Claims 19 to 22, characterised in that the second holder component (8) has at least one running face engaging with a rail (17).
24. Holding device according to one of Claims 19 to 23, characterised in that the second holder component (8) has two parallel arms extending upwards into a recess (7a) in the holder component (7), each of the said arms having a strip (8b) with a bearing surface overlapping a strip (7b), provided with a corresponding bearing surface, on the first holder component (7), and in that an opening (8c) is provided in the second holder component (8), extending through the holder component (8), and with a form matching that of a rail (17).

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