EP0688890A1 - Device for splitting the warp on a warping machine - Google Patents

Abstract

The appts. for separation of the yarns at a warping machine, has a rod grid (19) which is raised (22) from a neutral centre setting (M) into an upper operating position. A limit stop (21) holds the rod grid (19) in the lower operating position. The part rods (7) are locked (15) in the upper position, to be released in sequence into the lower position. Pref. an upper and lower horizontal rod (13,17) is after the rod grid (19), in the direction of yarn travel from the creel, to define, the upper and lower layer limits for the band of yarns. In the upper operating position, the bottom part rod (7e) is at a level of the upper guide rod (13) and in the lower operating position, the top part rod (7a) is at a level of the lower guide rod (17). The limit (21) is formed by the lowered lifting mechanism (22). The lock (15) can engage and release the lowest part rod when in the upper working position, through a rotating unit with a slit (25) to engage the part rods (7a-7e) and push the lowest part rod downwards while the upper part rods are blocked. The lifting mechanism (22) has its own drive motor. The whole rod grid (19) can be lowered from the central neutral position (M) into the lower working setting, for the part rods (7) to be raised in sequence into an upper working position, to be held in place in the upper setting. <IMAGE>

Description

The invention relates to a device for thread division on a warping machine according to the preamble of claim 1. Such devices are used to open the thread package unwound from a creel before winding onto the warping drum in such a way that cross cords or other sub-elements for determining the thread sequence or can be inserted to form thread groups for the subsequent sizing process.

In the simple crosshair formation to determine the thread sequence, the entire thread family is brought together on one level, with the help of a cross reed each second thread is deflected downwards or upwards to form the shed. With the multiple crosshair formation for the sizing process, the formation of the shed is more complicated because individual thread groups have to be separated on the creel according to the individual levels. The present invention relates in particular to a device for multiple reticle formation to form the so-called size division.

CH-A-370 363 has disclosed a device of comparable type in which the partial rods, with the exception of the uppermost and the lowest, are jointly lowerable and individually liftable in the partial rod holder, so that the distance between two successive partial rods is used for multiple crosshairs is enlargeable. A ratchet mechanism, which must be operated manually, is used to lift the partial rods individually. After the last part of the cord has been inserted, the part rods can be returned to their starting position, in which they all have the same spacing from one another. Since the relative position of the the uppermost and the lowest partial bar is never changed, the angular spectrum of the thread family remains always the same. Within this spectrum, however, the individual compartments are opened by moving the individual bars from top to bottom. This has the disadvantage that each compartment opens in a different relative position, which makes automatic partial cord insertion considerably more difficult. On the other hand, the size of the compartment opening is relatively narrow. In the known device, the partial cords are inserted manually.

CH-A-679 867 has disclosed a device in which the compartment opening for the sizing division takes place at the same location for all thread levels. For this purpose, several shafts arranged one behind the other are used instead of the partial rods, which are individually vertically displaceable. Each shaft can lower or raise a certain group of threads. However, this type of thread division is relatively complex since each individual shaft has to be driven. Each thread runs through a relatively narrow eyelet in its shaft strand and has to pass through several shafts with the strands of the neighboring threads held there unstable, which favors thread abrasion and leads to an inadequate production speed.

It is therefore an object of the invention to provide a device of the type mentioned at the outset, which in the simplest way ensures a sufficiently large compartment formation and an always the same position of the individual compartments, so that the insertion of the part cords can be automated better. This object is achieved according to the invention with a device which has the features in claim 1.

In contrast to the known device with displaceable partial bars, the relative position of the entire partial bar grate can be changed by means of the lifting device. that the partial bar grate is lifted out of the original working position. A shift by the same amount is also possible downwards, so that overall much larger compartments can be opened than with the known devices. The locking device enables the individual release of the partial rods, whereby the compartment size can be determined by means of upper and lower guide rods after the rod grate. These guide rods can also be used to uniformly limit the relative position of the individual subjects.

A particularly advantageous mode of operation is obtained if an upper and a lower horizontal guide rod for the upper and lower position limit of the thread family are arranged in the thread running direction after the bar grate and if the bottom part bar in the upper operating position is approximately at the height of the upper guide rod and if uppermost part bar in the lower operating position is approximately at the height of the lower guide rod. The known guide rods can be moved synchronously towards or away from each other since they are also used to bring the thread assembly together on a common level when the cross reed is actuated. The maximum compartment size can therefore also be set by adjusting these guide rods accordingly.

The stop for the partial rod grate in the lower operating position is preferably formed directly by the lifting device. However, it would be readily conceivable to design the stop independently of the lifting device, either as a fixed or as an adjustable stop.

The locking device is advantageously provided with a locking element with which the bottom bar in each case can be locked or released in the upper operating position. This arrangement simplifies the mechanical effort and improves operational safety. However, it would also be conceivable for each individual sub-staff to be assigned its own lock, the for example, could also work electromagnetically.

A particularly simple locking device is formed by a rotatable slot disc with a slot, which engages in rotation in the plane of movement of the partial rods, the slot pushing the bottom partial rod downward while the overlying partial rods are locked. In a neutral, disengaged position, the partial bars can be moved past the slotted disk to raise the partial bar grate. Instead of the slotted disc, however, other sequentially operating locking mechanisms such as e.g. B. a Maltese cross gear or an eccentric is conceivable.

The lifting device could be operated manually with a lever or with a crank. However, it can preferably be driven by its own drive motor, so that the lifting movement can be controlled together with an automatic insertion device for the partial cords. The same applies to the locking device, which is also provided with its own drive motor.

Of course, it would also be conceivable to handle the entire sub-process from bottom to top. For this purpose, the entire bar grate could be lowered from a neutral central position into a lower operating position by means of a lowering device. The partial bars would then be equipped with a lifting device, e.g. by a paternoster drive, displaceable into an upper operating position and fixable there by means of a holding device. It would also be important with this solution that the upper and lower operating positions are selected in such a way that a large subject formation with the same subject position is made possible.

Figur 1

eine schematische Darstellung einer Schäranlage,

Figur 2

eine Seitenansicht auf die erfindungsgemäss Vorrichtung mit dem Teilstabrost in der neutralen Mittellage,

Figur 3

die Vorrichtung gemäss Figur 2 während der Fachbildung mit einem Teil der Teilstäbe in der oberen Betriebslage,

Figur 4

die Vorrichtung gemäss Figur 3 bei der letzten Fachbildung mit allen Teilstäben in der unteren Betriebslage, und

Figur 5

eine Ansicht der Vorrichtung in Fadenlaufrichtung gesehen.

An embodiment is shown in the drawings and will be described in more detail below. Show it:

Figure 1

a schematic representation of a warping plant,

Figure 2

2 shows a side view of the device according to the invention with the partial rod grate in the neutral central position,

Figure 3

2 the device according to FIG. 2 during the formation of the compartment with a part of the partial rods in the upper operating position,

Figure 4

the device according to Figure 3 in the last compartment formation with all sub-bars in the lower operating position, and

Figure 5

a view of the device seen in the thread running direction.

Figure 1 shows the overall structure of a warping system 1 consisting of a warping machine 2 and a creel 3. The creel 3 is equipped on different floors and in different rows with bobbins 4, of which threads 5 are drawn in the direction of arrow a and on a warping drum 9 in sections be wound into a warp winding 8. After the warp winding has been completed, the threads are rearranged onto a warp beam 14.

The individual thread levels are separated from one another by the partial rods 7 in a partial rod holder 6. After the partial rods, the threads 5 pass through a cross reed 10 and a warping blade 11 in a manner known per se.

FIG. 2 now shows the area of the partial rod holder 6 and the cross reed 10 on a somewhat enlarged scale. The partial rod holder consists essentially of lateral guide rails 16, in which the partial rod grate 19 consisting of the partial rods 7a to 7e is vertically displaceable. The partial bars lie on a stop 21 of a lifting device 22 designed as a gripper. The lifting device consists of an electric motor 23, the gear mechanism of which engages in a lifting spindle 24.

In Figure 2, the bar grate 19 is in a neutral central position M, in which the threads 5 are guided without deflection in a sector with the angle α to a deflecting roller 20. An upper guide rod 13 and a lower guide rod 17 are arranged outside this sector. The Kreuzriet 10, which has no function here in the size division, is also in a neutral middle position. The warping blade 11 is moved to the deflection roller 20 in the operating position.

In addition to the vertical guide rails 16, at least one slotted disc 15 (FIG. 5) is arranged on the side, which can be rotated about an axis parallel to the partial bars. The slotted disk has a slot 25 running radially towards the center and a straight section 26. The slotted disk is arranged in such a way that in the rest position shown in FIG. 2, with its straight section 26, it allows the rod grate 19 to be displaced in the guide rails 16. On the other hand, when it is unscrewed, it engages in the plane of movement of the bar grate 19. In order to prevent the partial bars in the guide rails 16 from tilting, a slotted disk is preferably arranged on each side of the partial bars.

For the shed formation for inserting the partial cords 12, the guide rods 13 and 17 are moved somewhat together according to FIG. 3, so that the thread sheet is limited to a somewhat smaller sector β. At the same time, the warping blade 11 is withdrawn in the direction of the creel, since the part cords obviously have to be inserted behind the warping blade. With the help of the lifting device 22, the entire bar grate 19 is then raised until the bottom part bar 7e is approximately at the same height as the upper guide rod 13. It is evident that first all threads, except for the bottom thread level, are deflected downward on the individual guide rods.

When this upper operating position O is reached, the slotted disc 15 is pivoted in, so that the bar grate is held there. The stop 21 can now be lowered again to a position in which it defines a lower operating position U. Thereupon, the slotted disc 15 oscillates back and forth, each time a partial rod is gripped by the slit 25 and guided downwards until it falls down in the guide rails 16 due to gravity. At the same time, the slotted disc holds back the partial bars above.

In Figure 3, the lower part of the rod 7e has already fallen into the lower operating position U. The next part bar 7d is just gripped by the slotted disc and guided downwards, a part cord 12b being inserted in the thread compartment 18. A first partial cord 12a has already been inserted in the previous sequence. Between the individual sequences, the thread assembly must also carry out a tensioning movement in the direction of arrow b. This re-tensioning movement reliably promotes the compartment opening formed on the guide rods 13 and 17 to the sub-compartment area 18 despite possible fiber entanglement, and brings the part cords 12 to a suitable spacing position in the chain 8.

It can be seen from FIG. 4 that the lower operating position U is fixed in such a way that the uppermost part bar 7a is approximately at the same height as the lower guide bar 17. Between the first and the last sequence, however, the threads delimiting the compartment are always above the guide bars 13 and 17 deflected so that the thread compartment always takes the same relative position. After inserting the last part of the cord the slotted disc 15 is rotated back into the rest position, so that the bar grate 19 can be moved back into the central position M by means of the lifting device. In this middle position, the threads 5 pass through the bar grate at production speed without being looped.

Figure 5 shows the lateral arrangement of the gears for driving the lifting device and the slotted disks. The two spindles 24 are driven by the common motor 23, and the slotted disks can be pivoted synchronously via a pressure medium cylinder 27.

Claims (7)

Device for thread division on a warping machine (2), with a partial bar holder (6) in which a plurality of horizontal partial bars (7) are mounted so as to be vertically displaceable, the partial bars forming a bar grate (19) on which the distance between adjacent partial bars is used to form the shed on a thread sheet (5) penetrating the bar grate can be increased sequentially, characterized in that the entire bar grate (19) can be raised from a neutral central position (M) into an upper operating position (O) by means of a lifting device (22) such that a stop (21) for holding the bar grate (19) is arranged in a lower operating position (U), and that the partial rods (7) can be fixed in the upper operating position (O) by means of a locking device (15) and for moving into the lower operating position (U ) can be solved sequentially. Apparatus according to claim 1, characterized in that an upper and a lower horizontal guide rod (13, 17) for the upper and lower position limitation of the thread sheet is arranged in the thread running direction (a) after the bar grate (19), that the bottom part bar (7e ) in the upper operating position (O) is approximately at the height of the upper guide rod (13) and that the uppermost part bar (7a) is in the lower operating position (U) approximately at the level of the lower guide rod (17). Device according to claim 1 or 2, characterized in that the stop (21) is formed by the lowered lifting device (22). Device according to one of claims 1 to 3, characterized in that the locking device has a locking element (15) with which the bottom bar in each case can be locked or released in the upper operating position (O). Apparatus according to claim 4, characterized in that the locking device is a rotatable slotted disc (15) with a slot (25) which engages when rotated in the plane of movement of the partial bars (7a to 7e), the slot pushing down the lowest partial bar while the overlying bars are locked. Device according to one of claims 1 to 5, characterized in that the lifting device (22) can be driven with its own drive motor. Device for thread division on a warping machine (2), with a partial bar holder (6) in which a plurality of horizontal partial bars (7) are mounted so as to be vertically displaceable, the partial bars forming a bar grate (19) on which the distance between adjacent partial bars is used to form the shed on a thread sheet (5) penetrating the bar grate can be increased sequentially, characterized in that the entire bar grate (19) can be lowered from a neutral central position (M) into a lower operating position by means of a lowering device, that the partial bars (7) can be lowered by means of a lifting device can be moved sequentially into an upper operating position, and that the partial rods can be fixed in the upper operating position by means of a holding device.

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