EP0045331B1 - Bobbin creel for warping machines - Google Patents

Description

The present invention relates to a creel for warping machines, in which the vertical rods assigned to the bobbins each deflect the threads running from the bobbins to the gate exit, these rods being slidably supported parallel to one another between a preparation position and a functional position.

In weaving preparation, bobbin creels have the task of supplying a group of threads wound on bobbins in order, for example, to the winding device of a warping machine. For this purpose, the bobbins are designed as elongated, expediently V-shaped frames, on which the bobbins are attached in long rows and on several levels and from which the threads are continuously fed via a thread tensioning device in the direction of the gate output, which is formed by one end face of the gate , subtracted from.

Such a creel is known from US-A-2 547 072. In this known coil gate, all coils of each vertical coil row of the gate are each assigned three parallel rods extending over all levels of the gate, the middle one of which can be pivoted with respect to the other two. In the one end position of the pivoting, which corresponds to a preparation position, the threading is facilitated. In the other end position, the functional position, the threads running off the bobbins are deflected several times by the rods and are thereby braked. By moving the pivotable rod in intermediate positions between its two end positions, the wrap angle and thus the braking effect can be changed. The three rods assigned to each vertical row of bobbins thus form an adjustable thread tensioning device, the threads on the outermost rod being deflected in the direction of the gate exit. In their entirety, these rods form the brake table of the known gate.

Problems occur particularly with long gates of this type, because in particular the threads drawn from the bobbins of the end of the gate further away from the warping machine can no longer be guided clearly and without contact to the comb due to their considerable free draw-off distance and the resulting sag and their natural vibration . This can already apply to the threads of bobbins that are more than 5 m away from the comb.

In order to counter this disadvantage and to guide the threads over their entire free running distance, according to FR-A-1 108 771 they are passed through thread combs arranged one after the other or, according to DE-A-25 44 528, through perforated screens.

In such arrangements, however, the threads are subjected to additional friction with multiple supports, so that the draw-off conditions vary greatly within the creel, which leads to frequent thread breaks. Another disadvantage is the high expenditure of time when pulling in the threads in such arrangements.

It is therefore an object of the present invention to provide a bobbin creel of the aforementioned type, in which the threads leaving the thread tensioning devices are sufficiently separated for all threads of the gate while maintaining practically identical draw-off ratios, without the accessibility of the bobbin gate for a bobbin change or for Eliminating a thread break is impaired.

This is achieved according to the invention in that the rods are arranged in the thread running direction after thread tensioning and monitoring devices, in that at least the rods associated with the vertical coil rows remote from the gate output each end of the gate are displaceably guided along the gate on an upper or lower rail, and adjacent rods are guided by each a pair of knee joints are connected to one another, and that the rails at the end of the gate frame opposite the gate exit are pivotally supported by pegs and with the end of the rail end at an approximately parallel position to the gate into an angled position, the pivoting end of the rails being in an angled position aligned with one end of a fixed rail curve piece for bundling pushing the rods into the functional position.

With these measures, it is now possible to separate the threads of even the most distant bobbins from the gate exit practically without additional friction by the threads looping around the rods bundled in the functional position with only a fraction of the rod circumference, the distance between the bundled rods from one another being the measure for the distance of the threads. In the preparation position, in which the rods, on the other hand, run far apart in front of the respective vertical bobbin rows, the removal of a thread break or the replacement of a bobbin can be carried out completely unhindered.

To make it easier to move the bars from one end position to the other, it is useful if the bars are supported on the rails by rollers.

An advantageous arrangement also results if the rail curve pieces are bent from the end intended for cooperation with the rails in the direction of the gate exit against the gate, the end of the rail curve pieces near the gate then depending because it is connected via a pair of knee joints to the last rod on the side corresponding to the gate output.

• Figur 1 in Draufsicht in schematischer Darstellung eine Zettelanlage mit einem Spulengatter und einer Wickeleinrichtung, wobei die rechte Hälfte der Darstellung ein konventionelles Spulengatter und die linke Hälfte ein erfindungsgemäss ausgebildetes Spulengatter zeigt ;
• Figur 2 ausschnittsweise und in Seitenansicht Fadenführungsmittel am Spulengatter gemäss Fig. 1 ;
• Figur 3 einen Schnitt nach der Linie 111-111 der Fig. 1, in grösserem Massstab ;
• Figur 4 einen Schnitt nach der Linie IV-IV in Fig. 1 in grösserem Massstab und die
• Figur 5 verschiedene Funktionslagen der erfindungsgemässen a-c Fadenführungsmittel am entsprechenden Spulengatterabschnitt, in Draufsicht und in grösserem Massstab.

An example embodiment of the invention is explained in more detail below with reference to the drawing. Show it :

• 1 shows a plan view in schematic representation of a slip system with a creel and a winding device, the right half of the illustration showing a conventional creel and the left half of a creel designed according to the invention;
• FIG. 2 in detail and in side view of thread guiding means on the creel according to FIG. 1;
• 3 shows a section along the line 111-111 of Figure 1, on a larger scale.
• Figure 4 shows a section along the line IV-IV in Fig. 1 on a larger scale and the
• Figure 5 different functional positions of the ac thread guide means according to the invention on the corresponding creel section, in plan view and on a larger scale.

In Fig. 1, a slip system with a creel 1 and a slip machine 2 is shown in a simplified plan view. As is known, the threads 3 of the bobbins 4 plugged into the creel 1 are pulled off and wound onto a slip tree 5 with these machines, the thread being guided and divided by a slip comb 6.

The coil creel 1 comprises, in a known manner, an elongated V-shaped frame 7, on which the coils 4 are placed one above the other in long horizontal rows and in several levels, as will be described in more detail below. In the thread take-off direction towards the slip tree 5, the thread of each bobbin 4 passes through a thread tensioning and monitoring device 8 which, in its entirety, is also arranged in a known manner for all bobbins in the brake panel of the gate. The end face of the gate 1 facing the warping machine 2 forms the gate output 10, from which the two long sides of the coil gate 1 to the other end 11 of the gate 1 are slightly flared.

In Fig. 1, the coil gate 1 is shown on the right side as a conventional gate and on the left side as a gate according to the invention.

On the right-hand side, the threads 3 come from the bobbins 4 via their thread tensioning and monitoring devices 8 directly to the paper comb 6 of the paper-making machine 2. It is readily apparent that the length of the bobbin is limited, which is that of the bobbins of the paper-making machine 2 more distant end 11 of the gate 1 pulled threads 3 can no longer be guided clearly and without contact due to their considerable free withdrawal distance and the resulting sag and their natural vibration. Distances over 5 m from the comb 5 can already be regarded as the critical distance.

Here, the present invention intervenes, in that, as shown in FIG. 1 for the left side of the gate 1, in the area of the coil gate 1 which is more distant from the gate output 10 and which is described in more detail below, partially wrapped by the threads 3 and in its functional position from Gates bundled rods 9 projecting the threads 3 in this area from each other. These rods 9 separate the threads 3 of the bobbins 4 of a gate section 12 which is more distant from the gate output 10, whereas this is not necessary for threads of the gate section 13 closer to the gate output 10 because of their shorter distance from the comb 6. Of course, the above-mentioned route sections 12 and 13 can vary considerably depending on the overall length of the creel 1, the coil material used and the intended use.

In any case, the rods 9 cause the group of threads of the creel section 12 to open at the rear end region 11 of the creel 1, without noticeably impairing the draw-off conditions on the coils in this section 12 in comparison to those in the section 13 closer to the exit. This allows the construction of much longer slip gates than before.

The arrangement of the rods 9 on the creel 1 is shown in detail in FIGS. 2, 3 and 4 and described in more detail below.

In the foregoing, however, reference is made to FIGS. 5a, 5b and 5c, from which it can be seen that the rods 9 are arranged between a preparation position (FIG. 5a) and the individual rods in front of the thread tensioning and monitoring devices 8 of the bobbins 4 of an associated vertical bobbin row 15 bundled protruding from the gate, the threads 3 separating functional layer (Fig. 5c) are displaceable.

For this purpose, the rods are supported, in particular as shown in FIGS. 4 and 4, on an upper rail 16 and on a lower rail 17. The rails 16 and 17 are supported on the upper longitudinal members 18 and lower longitudinal members 10 of the gate frame 7, the lower longitudinal member 19 connected to the gate frame 7 serving at the same time to support the bottom of the gate 1. The arrangement of the rails 16 and 17 on both sides of the coil gate 1 (only the left side of a gate is shown in FIGS. 3, 4 and 5a, b and c) is such that they are located at the end 11 of the gate opposite the gate output Gate frame are each pivotally supported by a pin 20 and with the gate output-side rail end from an at least approximately parallel position to the gate (FIG. 5a) into an angled position (FIG. 5c).

Here, the swiveling end of the rails 16 and 17 in an angled position (FIG. 5c) interacts with one end of a stationary rail curve piece 21 or 22, such that the rods 9 are separated from the rails NEN 16, 17 slide onto the rail curve pieces 21, 22. The free end of the rails 16, 17 is guided in a stop frame 27 which limits the pivoting movement. As particularly shown in FIGS. 5a, 5b and 5c, the upper rail curve pieces 21 and the lower rail curve pieces 22 extend from the end intended for cooperation with the rails 16, 17 to the gate exit 10 and against the gate or the frame 7.

To move the rods 9 on or on the rails 16, 17 or the rail curve pieces 21, 22, the rods 9 carry at the bottom a fork 23 with a roller 24 which rolls on the lower rail 17 or the lower rail curve piece 22. At its upper end, on the other hand, each rod 9 carries a head 25 with a pair of rollers 26, which is guided on the upper rail 16 or the upper rail curve piece 21.

The individual rods 9 are connected to one another and the last rod 9 on the output side of the gate is connected to the end of the relevant rail curve piece 21 or 22 near the gate, in each case via a pair of knee joints 28, 29. Here, the individual knee joint members 28, 29 are connected in pairs by articulated bolts 30 at one end to the other end so as to be pivotable on the relevant rods 9 and held in position by adjusting rings 31. The length of the individual knee joint members 28 and 29 is such that the rods 9 have one or a plurality of divisions in accordance with the division of the vertical coil rows of the gate when the pair of knee joints are extended.

A handle 36 is expediently provided, by means of which the rails 16, 17 can be pivoted by hand between their two end positions.

Basically, however, both the rails 16, 17 and the rods 9 can be pivoted or moved by hand and / or by machine.

5a can first be seen that when the rods 9 are arranged in the preparation position shown there in front of the vertical rows of bobbins 15, the threading and other manipulations at these points can take place just as freely as in the section 13 of the slip gate 1 free of rods 9. This is because the rods 9 extend parallel to the columns 32 of the brake plate of the gate frame 7 carrying the thread tensioning and monitoring devices 8 and to the columns 34 of the coil plate of the gate frame 7 carrying the coils 4 or their slip-on spindles 33 of a vertical row of coils and in one plane these columns 32 and 34.

In order to bring the rods 9 out of the preparation position shown in FIG. 5a into their functional position for separating the threads running over them, the rails 16, 17 are first pivoted outward about the pins 20 into the intermediate position shown in FIG. 5b. The threads 4 in the section 12 of the gate 1 already receive a changed position with respect to the other threads.

Subsequently, the rods 9 are then pushed together to form a bundle projecting from the relevant gate side, specifically from the rear end of the gate 11, the knee joint members 28 and 29 swerving against the gate 1, with which the rods 9 approach each other until they come into theirs Fig. 5c shown position on the rail curve pieces 21, 22 assume, with which the thread field in said section 12 is opened in the desired manner such that the threads can practically no longer touch each other.

Through these measures, a creel was created with little design effort, which allows existing gates to be converted easily, which meets all the requirements.

Constructive changes to the above-described coil gate 1 are possible to a large extent without departing from the inventive concept. For example, the fastening means and displacement means between the rods 9 and the rails 16, 17 can be of a different construction; Furthermore, the frame of the creel can have parallel long sides and the coils of adjacent vertical rows can be offset, with each bar 9 then also being able to be assigned a number of vertical rows of coils. In order to further facilitate the work on the gate, it may also be expedient to identify the rods 9 and / or the columns carrying the vertical coil rows with one another, for example by coloring, so that even in the bundled functional position of the bars it is easy to see which vertical coil row a rod is assigned.

Claims (6)

1. Bobbin creel for warping machines, in which vertical bars each associated to a vertical row of bobbins deviate the yarns (3), running-off from the bobbins, in direction towards the creel outlet, whereby these bars are supported for sliding movement parallel to each other between a preparatory position and an operative position, characterized in that the bars (9) are arranged downstream of yarn tensioning and surveying devices (8) as seen in direction of yarn transport, in that at least those of the bars (9) of each creel side, which are associated to the vertical bobbin rows more distant from the creel outlet, are slidably guided by their ends along the creel respectively on an upper and a lower rail (16, 17 respectively) and adjacent bars (9) are connected with each other by a pair to toggle joint elements (28, 29), and in that the rails (16, 17) are horizontally swingably supported at the end (11) of the creel frame opposite the creel outlet (10) on pivots (20) for swinging movement of the creel outlet nearer end of the rails from a position at least approximately side-parallel to the creel into a swung-out position, whereby the out-swinging end of the rails (16, 17) in swung-out position is in alignment with the one end of a stationary bent rail piece (21 and 22 respectively) for a bundleing shifting together of the rails (9) into the operative position.

2. Bobbin creel as claimed in claim 1, characterized in that the bars (9) are supported on the rails (16 and 17 respectively) by means of rollers (24 and 26 respectively).

3. Bobbin creel as claimed in claim 1 or 2, characterized in that the swinging movement of the rails (16, 17) is limited by abutting means (27).

4. Bobbin creel as claimed in one of claims 1 to 3, characterized in that the bent rail pieces (21, 22) are curved from their end destined for cooperation with the rails in direction towards the creel outlet.

5. Bobbin creel as claimed in one of claims 1 to 4, characterized in the end of the bent rail pieces (21, 22) near the creel is connected by means of a pair to toggle joint elements (28, 29) with the last bar (9) of the corresponding side with respect to the creel outlet.

6. Bobbin creel as claimed in one of claims 1 to 5, characterized in that portions of the members (34) carrying a respective vertical bobbin row and the bars (9) associated thereto in their preparatory position are marked, e. g. by coloration, for identification of their appertainance.

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