JPH06341026A - Method and apparatus for seizing sliver end part in spinning and weaving machine - Google Patents

Abstract

PURPOSE: To search and capture a sliver end with a simple method and good reliability by optically detecting the position of the free end of the sliver, then introducing the free end into a clamp actuation zone. CONSTITUTION: The can 1 is turned in an arrow A direction in such a manner that the free end 4 of the sliver 2 suspending from the upper opening edge 3 of a can 1 attains a predetermined angle position and, thereafter, the position of the free end 4 of the sliver 2 is detected by an optical system consisting of a light source 5, a reflection surface 6 and a photodetector 6 when the free end is searched and captured for supplying the sliver to a drawframe, or the like. After the existence of the free end 4 in a prescribed position is detected, a suction nozzle 18 is actuated to part the free end 4 from the can 1 and a movable gripper 17 is relatively moved to introduce the free end 4 into the actuation zone of the clamp 14 of a gripper 17, following which the clamp 14 is closed to surely clamp the free end 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device capable of finding and capturing a sliver, in particular its end, in a textile machine. The invention is particularly
However, applied non-proprietarily to the technology of drawing, worsting and processing machines, these machines come out of their respective holders called cans and by means of individual slivers with a diversity of fibers laid side by side. The entire composed sliver is processed.

[0002]

According to known methods, these cans, each containing a continuous sliver of fibers, are introduced one by one into a machine to replace an empty can, and then the sliver of this full can. Has its free end hanging freely outside the cans, and this free end has been sought to introduce a new sliver into the whole of the sliver of the sliver, in place of the exhausted sliver,
It is then devoted to being captured.

[0003]

To date, finding the sliver and transporting or transferring the sliver into the entire sliver of the sliver, even though satisfactory, is not the same as the sliver capture operation itself. It doesn't. In practice, this capture is done by two clamps that close on the sliver when the sliver case is located.
In a real device, poor clamping of the sliver by the clamp would break the end of the sliver, then it wouldn't sit well in the whole sliver, and if the sliver was only captured in one part of its thickness, it would separate. The sliver becomes damaged, only half of the sliver is normally sent into the whole sliver, while the other half spreads to the ground, and if only one part of the sliver is caught, the sliver is damaged, The introduction of sliver into the whole becomes irregular and the quality is deteriorated. It is an object of the present invention to provide a method and a device capable of completely capturing a sliver and ensuring the safety of the sliver, and correcting the above-mentioned inconvenience.

[0004]

To this end, the present invention provides
It relates to a method of locating and capturing a sliver, especially its ends, in a textile machine, the sliver being placed in a holder that can rotate around a vertical axis and hanging freely outside the holder. It presents a free end, which is characterized by the following points: until the free end of the sliver occupies a position at a predetermined angle with respect to the axis of the carrier, the carrier is kept perpendicular to it. Rotate about an axis; radially displace the free end of the sliver with respect to the holding body to guide the free end of the sliver into the working zone of a clamp attached to the movable gripper carrying the free end; Manipulate the closure of the clamp to capture the free end in a position away from the end.

When the free end of the sliver moves away from the holder, this movement is preferably done by means of compressed air, but the free end of the sliver is predetermined so that it is easier to be caught later by the clamp. Will be guided to the designated position. If it is desired to capture the sliver at a predetermined distance from its end, when the free end reaches the above-mentioned predetermined angular position, the free end of the clamp and the sliver may be moved before the above-mentioned moving away. The relative movement between
It occurs in the longitudinal direction of the sliver so that the working zone of the clamp lies at a predetermined distance from the end of the free end of the sliver. This relative movement is obtained, for example, by lowering the clamp along the free end of the sliver. The detection of the predetermined angular position of the sliver and / or the detection of the end of the relative movement mentioned above is preferably performed by conventional means of optical type.

The invention relates to a device for using the above method, characterized in that it comprises: an initial detection means for detecting said predetermined angular position; a free end of the sliver. Disengaging means for radial separation with respect to the holding body and for carrying it to the working zone of the clamp; means for closing the clamp so as to capture the free end of the sliver at a position remote from this free end.

According to a preferred embodiment, the separating means are
A free end of the sliver is constituted by an exhaust nozzle, which is oriented radially with respect to the holder and is located at a preferred distance from the holder, and the free end of the sliver is, due to the predetermined angular position, the exhaust nozzle and the holder. And the exhaust nozzle is below the level of the capture finger. Advantageously, the free end of the sliver is connected to a radial stop which leans against its remote position so that it can be captured later by a clamp. This stop consists, for example, of a filter covering the nozzle and a rigid grid.

The device described above is a means for initiating relative movement in the longitudinal direction of the sliver between the clamp and the free end of the sliver which is captured at the predetermined angular position, before the separating movement. Is advantageously complemented by which the clamp can be introduced for capturing the sliver at a predetermined distance from the sliver end. The detecting means, the clamp and the releasing means are arranged so as to move vertically along the holding body.

The detection means may be of the optical type,
In this case the following are included: a light source oriented radially with respect to the carrier, a receiver for the reflecting surface and the bundle of reflected rays, these means comprising the above-mentioned angular position with the free end being predetermined. The incident and / or reflected ray bundles are arranged to be interrupted by this free end when Assuming that the reflecting surface is fixed, in this case the reflecting surface is supported by the same holder as the light source and the light receiver, and if the reflecting surface is movable, this reflecting surface is
It is supported by the peripheral surface of the holder at a suitable height facing the light source and the light receiver.

In the case of a fixed reflective surface, the carrier has a rim projecting out above the level of the clamp so that the free end of the sliver hangs away from the peripheral surface of the carrier. The fixed reflecting surface is placed in this space between the free end and the holder and is supported by the arms that connect the reflecting surface to the holder of the light source. Referring to the accompanying drawings which form part of the following description,
A thorough understanding of the invention may be gained by reading this supplemental description.

In FIG. 1, the sliver is depicted in one of the positions occupied at the beginning of the search. 2 is shown in FIG.
2 is a schematic view of the device of FIG. 1 from above, with the sliver depicted in the position it occupies in FIG. 1 and at the end of the search. In FIG. 3, the sliver and device occupy the position of capture activity.

In these figures, a carrier or can 1 containing fibers 2, for example long fibers, is shown diagrammatically. The can is a cylinder with a circular bottom and has an open top 3 through which the sliver 2 is pulled out. The can 1 is applied through its top to feed the sliver 2 to a yarn processing machine, for example a kneading machine, in which a large number of slivers such as the sliver 2 are treated in a suitable manner Are placed side by side to form the.

When the can 1 is brought into the starting condition for the machine, the sliver 2 leaves the can over the edge 3 of the upper opening of the can and presents a free end 4 free to hang outside the can. Like In order to pull the sliver 2 into the whole sliver it is necessary to continuously seek out the free end, capture it and then transfer it into the whole sliver. For this purpose, in the first phase of the method according to the invention (which is known per se), the can 1 is rotated about its vertical axis by means known per se and the free end 4 is It is guided to a position at a predetermined angle with respect to the axis. Wherever the initial position of the free end 4 is, the can 1 rotates as shown by the arrow A (FIGS. 1 and 2) until the free end 4 occupies the position of the above predetermined angle. This position is preferably detected by an optical method.

For this detection, the device according to the invention is equipped with a light source 5 and a reflecting surface 6 oriented radially with respect to the can 1.
And a light receiver (not shown as it is coupled to the light source 5) is included, which light receiver reflects the bundle of reflected rays 7 which is reflected by the face 6 and originates from the bundle of incident rays 8. Applied to. In the exemplary embodiment, the reflecting surface 6 is fixed, for which reason it is supported by the arm 9 which is rigidly connected to the light source 5 and the carrier of the light receiver. Moreover, the can 1 has an upper rim or flange 10 which, after the free end 4 passes over this rim 10, extends vertically away from the peripheral surface 11 of the can 1. In addition, since it projects radially outward and the reflecting surface 6 is located in the immediate vicinity of the peripheral surface, it enters between the reflecting surface and the light source or the light receiver when the free end 4 rotates according to A. Can be like The outer protrusion of the rim 10 is
It is smaller than the projection on the lower rim 12 of the can so that the rim 10 is not damaged.

As a variant, for the optical detection of the position of the free end 4, the reflecting surface 6 and the rim 10 can be dispensed with, in which case the peripheral surface 11 of the can 1 is at its proper height its entire surface. The reflective surface 13 is exhibited over the periphery. First, put the can 1 in the machine, along the axis of rotation A
Rotating in the direction until the free end 4 occupies one of the two positions shown in FIG. 2, at which position the free end lies between the light source 5 and the reflecting surface 6, whereby the incident light beam The bundle 8 or the reflected ray bundle 7 is also cut off. In this position, the free end 4 preferably leans against the armrest 9. Due to the fact that the bundle of reflected rays 7 no longer reaches the receiver, the receiver emits a signal indicating that the free end 4 is at the predetermined desired position, whereby the rotation of the can 1 is immediately stopped. Like

In order to ensure the movement of the sliver 2 by its free end 4 from the position of the above-mentioned predetermined angle, the device according to the invention belongs to a movable gripper which ensures this movement. Included on the holder 16 are two clamps 14 continuous about a vertical axis 15. These pinching or capturing fingers 14 are located above the detection means and are arranged so that they can occupy two positions and see the invisible position (FIGS. 1 and 2). In contrast, these clamps have a can 1 and a free end 4 in the above-mentioned predetermined angular position and in the actuated or closed position (FIGS. 3 and 4).
Away from, but in this actuated or closed position,
The clamp closes very close to the peripheral surface 11 of the can and extends considerably in a radial position with respect to the can 1 so that the free end 4 can be pinched.

In order to ensure a complete and quite safe capture of the free end 4 by the clamp 14, the free end 4 guides it in its working zone with the clamp 14 into the working zone of these fingers. For fitting 1 especially the free end
In order to bring it closer to 5, the can 1 is moved in a radial direction. Such radial disengagement is apparent by examining FIGS. 2-4, but in these figures, starting from the position of FIG. 2, the free end 4 approaches the joint 15 in the radial direction to the left. You can see that you are away.

In the preferred implementation, this disengagement is preferably accomplished by pneumatic actuation, more precisely by suction using a nozzle 18, which is connected to and held by a suction source (not shown). Directed radially towards the body 1, the nozzle blowpipe is located slightly closer to the can 1 than the joint 15. A vertical filter and grid covers the nozzle blowpipe 18,
As best seen in FIG. 3, it constitutes a stop for the free end 4 at a remote position. Nozzle 1
8 is positioned vertically below the clamp 14 and vertically above the optical detection means.

When the free end 4 comes into contact with the stop 19, the closing operation of the clamp 14 takes place and the free end 4 is captured in a complete and absolutely safe manner as follows. The clamp 14 preferably captures the free end 4 at a predetermined distance from its free end 20 in a manner known per se. To this end, after the end of rotation of the can 1 according to arrow A, i.e., when the free end 4 has reached the position of the predetermined desired angle, before the above-mentioned disengagement, and thus before clamping the sliver, A vertical relative movement between the free ends 4 takes place in the longitudinal direction of the sliver, whereby the free ends 4 are captured at a predetermined distance of the free ends 20. It is constructed by moving vertically as a single assembly, as indicated by the arrow B in FIG. 3, with the detection means, the nozzle 18 and the gripper 17 supporting the clamp 14. During the descending movement of this assembly, the incident ray bundle 8 descends along the free end 4 and the reflected ray bundle 7 remains until this interruption ceases (FIG. 3), ie the descending movement stops. Until then, it still doesn't exist. At this moment, the clamp 14 is rotated towards the closed position, which ensures that the free end 4 is captured at a predetermined distance from the free end 20.

As seen in FIG. 4, curved,
Clamp 14 having, for example, a round or oval cross section
Actually contact when in the tightening position to tighten the sliver. When the sliver is clamped by the clamp 14, the length of the sliver under the finger is determined by the vertical spacing between the clamp and the detection means. It is a matter of course that this spacing can be varied and adjusted if one wishes to modify the length of the sliver under the clamp.

From the above description, it follows that the present invention provides a method and apparatus capable of capturing the free end of a sliver, which is a reliable and simple method. While having a mochi theory, the present invention is
As with the previously described modes of use, it is not limited to modes of implementation. On the contrary, various modifications could be devised without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a schematic elevational view showing the apparatus of the preferred embodiment of the present invention.

2 is a schematic view from above of the device of FIG.

FIG. 3 is a schematic elevational view of the device in a different operating condition than FIG.

FIG. 4 is a plan view of the device of FIG.

[Explanation of symbols]

 1 holding body 2 sliver 4 free end of sliver 5 light source 6 reflecting surface 7 receiver of reflected ray bundle 9 arm bar 11 peripheral surface of holding body 13 reflecting surface 14 clamp 17 movable gripper 18 releasing means 19 stopper 20 end of sliver

Claims (16)

[Claims] 1. Rotating the holding body (1) about its axis until the free end (4) of the sliver (2) occupies a position at a predetermined angle with respect to this axis; The sliver (2) is placed in the working zone of the clamp (14) attached to the movable gripper (17) that moves (4).
In order to introduce the free end (4) of the sliver in a radial direction with respect to the holding body (1); and the free end (4) of the sliver at a position remote from the free end. The sliver is placed in a holder (1) capable of rotating about a vertical axis, characterized in that the closure (14) of the clamp is manipulated to capture the holder (1).
A method of locating and capturing a sliver (2) in a textile machine, which exhibits a free-hanging free end (4) on the outside, especially of its end. 2. Method according to claim 1, characterized in that the free end (4) is separated from the carrier (1) by actuation of compressed air, in particular by suction. 3. Method according to claim 1 or 2, characterized in that the free end (4) is introduced at a predetermined radial position during the separating movement. 4. When the free end (4) reaches said position at a predetermined angle, prior to said disengagement movement, the working zone of said clamp (14) is the end of said free end ( Two
0) a relative movement in the longitudinal direction of the sliver between the clamp (14) and the free end (4) of the sliver so as to be located at a predetermined distance from 0). The method according to 2 or 3. 5. A method as claimed in claim 4, characterized in that the relative movement is obtained by lowering the clamp (14) along the free end (4). 6. The method according to claim 1, wherein the detection of the position of the predetermined angle and / or the detection of the end of the relative movement according to claim 5 are performed by an optical operation. The method according to 2, 3, 4 or 5. 7. A first detection means (5, 6, 13) for detecting a position at a predetermined angle; a free end (4) of the sliver is radially separated from the holding body (1). ,
A separating means (18) for introducing this free end into the working zone of the clamp (14); and a clamp (14) for capturing the free end (4) of the sliver at a position remote from this free end. Means for closing; a device for using the method according to one of claims 1 to 6, characterized in that the device comprises: A device in a machine that seeks and captures the end of a sliver. 8. The separating means is constituted by a suction nozzle (18) directed slightly towards the holding body (1), slightly away from said holding body (1), the free end of the sliver being: Characterized by being located between this nozzle (18) and the holding body (1) with respect to said predetermined angular position, and the nozzle (18) being located below the level of the clamp (14). An apparatus according to claim 7. 9. The nozzle (18) is characterized in that the free end (4) is associated with a catch (19) that leans against its free position (4) in order to be caught by the clamp (14). Item 8. The apparatus according to item 8. 10. Device according to claim 9, characterized in that the stop (19) is constituted by a filter and a grid covering the nozzle (18). 11. The free end (4) and the clamp (1) as described above.
4) between the above-mentioned predetermined angular positions, prior to said separating movement, including means for causing a relative movement (B) in the longitudinal direction of the sliver, for which the clamp (14) is provided. Device according to claim 7, 8, 9 or 10, characterized in that it is introduced for capturing the sliver at a predetermined distance from the end (20) of the sliver. 12. Detecting means (5, 6, 13), clamps (14) and separating means (18) are adapted to move the long holding body (1) and the free end (4) vertically. Device according to claim 11, characterized in that it is arranged. 13. A light source (5) and a reflecting surface (6, 1) oriented in the radial direction toward the holder, wherein the detection means are of the optical type.
3) and a receiver of reflected ray bundles (7), the detection means being such that the incident ray bundle (8) and / or the reflected ray bundle have the free end (4) at the predetermined angle. 7. The arrangement is such that it is cut off by this free end when the position of is reached.
2. The device according to any one of 2. 14. The reflecting surface (6, 13) is fixedly supported by the same holder as the light source and the light receiver at a proper height with respect to the light source and the light receiver, or around the holder. 14. Device according to claim 13, characterized in that it is movably supported by a surface (11). 15. The holding body (1) having the free end (14).
The holding body (1) has a rim protruding outward above the level of the clamp (14) so that it hangs away from the peripheral surface (11) of the fixed reflective surface (6). 15. Device according to claim 14, characterized in that, in this space between the end (4) and the carrier (1), it is supported by arms (9) connected to the carrier of the light source (5). . 16. The clamp (14) is characterized in that it has a particularly round or oval curved cross section.
The device according to any one of 1 to 15.