CH652761A5 - AUTOMATIC LIFTING DEVICE ON LARGE NUMBER SPINNING MACHINE. - Google Patents

Description

The present invention relates to an automatic lifting device on a spinning machine for large numbers according to the preamble of claim 1.

We know that the automatic lifting devices on continuous spinning the big numbers known at present do only a kind of semi-lifting, that is to say that they only remove the reels full but do not place the empty tubes on the pins thus released. In addition, the sectioning of the wires before the lifting of the full reels almost never works correctly.

It is understood, moreover, that for a very long time there have been automatic lifting devices on continuous, called fine numbers, which therefore have small coils to evacuate and replace, but the situation is very different for large numbers . Indeed, it is not possible to purely and simply transpose existing devices for fine wires to machines for large wires, by increasing the dimensions of the parts or by strengthening them. Small mechanisms which, until now, could for example be housed under the machine can no longer be, since all the dimensions have increased, which means that they have to be housed or placed elsewhere.

Thus, the spacing between bobbins on a spinning machine for fine yarns has always, up to now, made it possible to accommodate the bobbins on standby between the full bobbins, which is no longer possible on a spinning machine for large yarns since, there, the spacing makes it possible to house there only the full reel and not yet the standby reel.

In addition, given the large dimensions of the coils for coarse wires and the whole device which is called upon to maneuver them, the fundamental principles used for fine wires can no longer be used.

The present invention therefore aims to avoid the aforementioned drawbacks and especially to provide an automatic lifting device for continuous spinning large numbers with all the mechanisms and adaptations that this requires. The invention solves these problems with a machine for spinning large numbers according to the characteristic of claim 1.

According to a preferred embodiment, a gripping head, of the pneumatic type, comprises two branches, one fixed and immobile, while the other, mounted to slide, is sandwiched, at its folded end, between two inflatable hoses capable of receiving compressed air, one or the other depending on the phases of the operating cycle.

The characteristics and advantages of the invention will emerge from the description which follows and from the examination of the appended drawings, which form part of the description, showing, by way of nonlimiting example, an embodiment of the invention ; in these drawings:

fig. 1 shows, in cross section, a continuous spinning machine equipped with the automatic lifting device according to the invention; to allow observing the regulations concerning the dimensions of the frame, this view has been cut into an upper part A and a lower part B which are connected along C-C;

fig. 2 shows, in front view, the pusher control mechanism;

fig. 3 gives an embodiment of the mechanism of the gripping heads, and FIG. 4 is a sectional view along IV-IV of FIG. 3.

Fig. 1 makes it possible to understand how the device according to the invention has an operation which performs a complete cycle, that is to say which ensures, thanks to the gripping heads, not only the removal 20 of the full coils, but also the setting in place of empty tubes on the pins to replace the full coils from which they were stripped.

In the drawings, 1 denotes a full coil; 2 the wire delivered by the drawing system 3; 4 the wire guide, 5 the anti-balloon, 6 the 25 ring lath; 7 the pusher device, that is to say the slat which unlocks the coils 1 so that there is no resistance when the gripping heads 8 are called upon to grip them.

The reels are driven by the whole of the drum 9 and the straps 10.

The gripping heads 8, the construction and operation of which will be described in more detail below, are carried by a carriage 11 which is controlled, in its descent and in its ascent, by a small motor (not shown) located in the top of the machine, the movement being transmitted by a strap 12 fixed to the carriage 11, which is guided by a rail 110 on which rollers roll 13. The end of the strap 12 is tightened in a flange 120 connected to a bracket 121 by a device 123 making it possible to adjust the stroke of the carriage 11, said bracket being fixed to the carriage 11.

At the upper part of the machine is provided a rack 15 con-40 holding empty tubes 16. This rack 15 is retractable by pivoting around an axis 46 provided at the upper part of the chassis, passing it from position 15 in solid line at position 15 'in dashed.

The rack tube holder 15 is controlled by the links 17a and 17b. On the pivot axis 17c of the link 17a is a lever 45 which is actuated by a jack, which is controlled by a contact at the different times when it must intervene.

The full coils 1, when they are released by the gripping head 8, fall on a discharge ramp 18 and slide on a conveyor belt 19 which takes them to the end of the machine. The ramp 18, 50 which rests on the rack 15, passes into position 18 'when the rack retracts into 15'.

The start of the operating cycle is triggered by stopping, that is to say, the end of braking, of the machine after the sub-winding. At this instant, a contact starts the cycle. 55 From this moment, the entire cycle takes place by successive contacts, that is to say that after each operation a new contact is reached which controls the next operation and so on. The whole therefore constitutes a programmer.

At the end of the cycle, everything is stopped, i.e. the machine and the 60 cycle. It is only after correctly placing the empty tubes on the spindles that the operator starts the machine himself.

The cycle is as follows:

The rack 15 carrying the empty tubes 16 is in the retracted (retracted) position 15 ′,

65 - the wire guides 4 are raised,

- the ring lath 6 and the balloons 5 are mounted,

The carriage 11 carrying the gripping heads 8 is lowered empty into the low position 11 ′,

The pusher 7 is mounted,

In the tubes of the coils 1 freely penetrate the branches 8a and 8b placed one against the other of the gripping head 8,

One of the branches 8b of the plug head moves away from the branch 8a so that the full coil 1 is firmly gripped,

- the pusher 7 is lowered,

- the ring lath 6 has come down,

The carriage 11 carrying the gripping heads with the full coils 1 is mounted in the high position shown in solid lines,

The rack 15 carrying the empty tubes 16 is advanced and with it the discharge ramp 18,

- The gripping heads 8 release the full coils 1 due to the elimination of the spacing of the branches; the coils 1 fall on the discharge ramp 18 and slide on the conveyor belt 19 which takes them to the end of the machine,

The rack 15 moves back to position 15 ′ with its discharge ramp 18 ′ in order to clear the space in which the gripping heads 8 will pass, free of the coils,

- The carriage 11 descends to the tube gripping position, that is to say so that the gripping heads 8 are placed just above the tubes 16; the rack 15 advances from position 15 ′ to position 15 to present the tubes 16 to the gripping heads 8,

The gripping heads 8 descend a little (position 8 ′) in order to engage their branches, brought against each other, in the empty tubes 16,

The gripping heads 8 are then made active by spreading their branches 8a, 8b, and the empty tubes 16 are thus firmly blocked by the pressure exerted on their internal walls,

The rack 15 moves back to position 15 ′ and the empty tubes 16, taken by the gripping heads 8, are released therefrom,

The carriage 11 descends with the empty tubes 16 in position 11 ′, that is to say the position corresponding to the start of the penetration of the tubes 16 on the conveyor head 25,

The gripping heads 8 are then rendered inoperative by the cessation of the separation of the branches 8a, 8b and the tubes 16 fall on the pins 26,

- The carriage 11 carrying the gripping heads 8 is raised to the high position.

The machine is thus ready for a new cycle. During the operation of the machine, the rack 15, which is always in the retracted or retracted position 15 ′, is manually filled with empty tubes 16.

Such an embodiment has many advantages, apart from those already known and which are inherent in all automatic lifting devices such as saving time, saving personnel and therefore increasing the efficiency of the machine:

- since these are large and therefore heavy coils which must be evacuated, the fact that the staff no longer needs to handle them; great fatigue is spared it and it can, therefore, be used elsewhere;

- By the automatic lifting device, the reels undergo less handling than during a manual lifting, which preserves them from many malformations and even degradations and has an advantageous effect on the quality of the thread and thereby on the finished product;

- by equipping a large numbers machine with an automatic lifting device, it can acquire the same flexibility - in work, in production, in change of parts, in other words

652,761

in handling and operation - than that already known on fine number machines.

To clarify the description of the cycle above, we will add the following supplements:

The thread guides 4 are arranged, during normal operation of the machine, just above the pins 26 and, in this case, just above the squeezing heads 25. During the automatic lifting, the coils 1 are stripped and raised in until the upper end is significantly higher than the draining head 25 and, moreover, the gripping heads 8 come to take said coils 1 full from above. It is therefore understood that the wire guides 4 cannot remain in their working position and must be retracted. The simplest solution, in this case, is to raise them, that is to say that all the wire guides 4 are mounted on an axis lying along the frame and, by the rotation of this axis, they are all lifted up, so-called raised wire guide. When the lifting is done and the empty tubes 16 are in place, they are returned to their working position.

With regard to the break of the wire during the evacuation of the full reel 1, the portion of wire which must break is between the washers 33 and 34. In order for this break to take place in a safe manner, said washers 33 and 34 are provided with slots around their entire periphery so that the wire is taken there and breaks when the washer 34 rises with the coil 1 and that the washer 33 remains stationary in its place.

As for the mechanism which controls the pusher 7, that is to say the slat which unlocks the coils 1 so that there is no resistance when the gripping heads 8 are called upon to take them, it operates in the manner next (fig. 2).

The jack 38, the piston 39 of which is fixed on the part 40 integral with the angle iron 41, acts on the ramp 42 also fixed on the angle iron 41. On the ramp 42 rests the roller 43 which, by means of the rod 44 , is integral with the pusher slat 7.

Thus, when the jack 38 pulls the ramp 42 towards it, the pusher 7 rises and, when it pushes it back, the pusher 7 descends, which allows the latter to perform the following work or cycle: a) unlock the full coils 1 of pins 26; b) break the wires 2; c) cause the coils 1, the top at least, to protrude from the drain heads 25; d) mount the coils 1 up to a given height, in order to e) present them to the gripping heads 8.

When the gripping heads 8 have taken the coils 1, the pusher 7 returns to its low position by the movement in the opposite direction of the piston 39, angle iron 41, ramp 42, roller 43 and rod 44.

The mechanism of the gripping heads 8 (fig. 3 and 4) is designed as follows.

The cradle 27 contains the hoses 28 and 29 which sandwich the branch 8b, folded square, of the socket head 8. The branch 8a of the socket head 8 is fixed and immobile. The branch 8b of the plug head 8 is movable and can slide in the direction of arrow 30; it is supported and guided by the screws 31 and the washers 32. The hoses 28 and 29 receive compressed air and, thus, when the hose 29 is under pressure, the hose 28 is no longer and the branch 8b of the gripping head 8 approaches the branch 8a of the gripping head 8, which keeps the gripping head inoperative; when the hose 28 receives the compressed air, the hose 29 releases its own and the branch 8b of the intake head 8 departs at 8b1 (fig. 4) from the branch 8a of the intake head 8, which maintains the intake head 8 in the effective position, that is to say that it holds the coil 1 by the tube 16. To return the intake head 8 to the inoperative position, the pressure is put back into the hose 29 and released that of hose 28, and so on.

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2 sheets of drawings

Claims (2)

652,761 2 CLAIMS 1. Automatic lifting device on a spinning machine for large numbers, carrying out a complete lifting comprising both the removal of the full reels and the replacement of the empty tubes on the spindles, device comprising tube gripping heads, means acting on the heads so that they hold or release the tubes at the appropriate times, means for evacuating and transporting the full reels, and means for presenting the empty tubes to the gripping heads, characterized by a movable carriage (11 ) carrying the gripping heads (8), moving from bottom to top and from top to bottom to bring to the evacuation the full reels seized (1), take empty tubes (16) and move them to place them on the pins (26) stripped of coils (1), and by a rack (15) which contains empty tubes (16) and is retractable by pivoting around an axis (46) provided at the upper part of the chassis, passing it position (15) of the tubes voids (16) to a retracted position (15 '). 2. Device according to claim 1, of pneumatic type, characterized in that the gripping heads (8) comprise two branches (8a, 8b), one (8a) fixed and stationary, while the other (8b) , slidably mounted, is sandwiched, at its folded end, between two inflatable hoses (28, 29) capable of receiving, one or the other depending on the phases of the cycle of operations, compressed air.