FR2588887A1 - BUSINESS TO FILTER - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A SPINNING TRADE. JOB CHARACTERIZED IN THAT THE PROBE 21 MONITORS IS THE NORMAL PATH OF ONE OF THE TWO FIBER ASSEMBLIES 22; 22 ABOVE MEETING POINT 19, EITHER THE NORMAL PATH OF WIRE 23 BELOW MEETING POINT 19, TO CHECK WHETHER THE FIBER ASSEMBLY CONSIDERED WHERE THE WIRE IS PRESENT AND WHO, WHEN THE FIBER ASSEMBLY MONITORED OR THE WIRE IS SUDDENLY ABSENT IN SERVICE ON ITS NORMAL PATH, TRIGGES A BREAK SIGNAL.

Description

The invention relates to a spinning machine, preferably

  a continuous ring, for wire spinning,

  so many multiple spinning stations in each of which two assemblies of textile fibers emerging side by side with the spacing of a drafting bench, in the form of ribbons of fibers not yet twisted, arrive at a meeting point and from that here, are twisted together to form the wire that arrives at the spindle, or the like, communicating to it the torsion, at each spinning station being attached a probe that responds

  as well as the break-up of any one of the two

  fiber only when the wire is formed.

  Such a spinning machine produces yarns each time starting from two assemblies of fibers which arrive at a meeting point from which they are twisted together in

  a single thread. Fiber ribbons can be formed from

  any other than endless, preferably of combed wool. Twisting of the wire may be generated by conventional means, preferably by means of a pin which coaxially traverses a spinning ring on which a slider dragged by the wire can rotate. However, it is also possible to provide other devices for generating the twist and for winding the wire, for example a rotating spinning pot,

  a finned pin, or the like.

  Each workstation of the spinning machine, where one

  manufactures a wire, is called spinning station.

  In a known spinning machine of this kind (DE-A-30 21 614), at each spinning station is a thread breaker which has as a feeler a rotatable arm, placed on the meeting point. If a fiber assembly breaks, the arm swings down and triggers, by means of

  a blocking device enclosing the wire and which is connected so-

  lidarily to the arm, a consecutive rupture of wire, which

  is desirable because, generally, the movement of the

  The remaining fiber appearance at the spinning station is not interrupted by the breakage of only one of the two fiber assemblies. We would then spin a wire of less thickness, two

  times less in the case of similar partial constituents.

  This defect location would easily lead, during the subsequent processing of the wire, to broken wire and to a defective merchandise. In fact, the advantage of this known wire breaker is that it only requires a single mechanical feeler. However, since this mechanical probe formed by the arm is placed on the meeting point, it can influence it and the wire, for example move it downwards and increase the risk of rupture, particularly in

the case of fine threads.

  Also known is a spinning machine of this kind (DE-A-30 28 453) in which there is also provided a single feeler which, however, at some distance below the meeting point of the two fiber assemblies, palpates a property of thread running from the meeting point downwards, property that changes in a recognizable way if we do not run the thread anymore than starting from one of the two assemblies

  fiber. This property can be its mass / length to me-

  capacitively surge or its thickness to be measured photo-

  optically. However, this assumes a good uniformity of the wire, so that this method of measurement is only applicable in a limited way. There is also the danger that down on the measuring instrument may lead to

erroneous measurements.

  The aim of the invention is to create a spinning machine for

  indicated at the beginning in which we also need

  than one thread breaker per spinning station, but which does not increase

  the risk of breakage of the fiber assemblies or the wire and which make it easy to spin wire

  any, even very irregular.

  This problem is solved according to the invention by the fact that the probe monitors either the normal path of one of the two fiber assemblies above the meeting point, or the normal path of the wire below the meeting point, to check if the fiber assembly considered or the yarn is present and which, when the fiber assembly monitored or yarn is suddenly missing in service on its way

  normal, triggers a break signal.

  Another embodiment is characterized in that the probe is a probe designed for non-contact probing, which monitors the normal path of the wire below the meeting point, to check whether the wire is present, and that the The probing range of this probe extends beyond the normal position of the meeting point of the two fiber assemblies, in the direction of the drawing bench. In the invention, the probe does not need to respond sensitively to a property of the yarn that varies, but only to the presence or absence of the yarn or

  the fiber assembly considered on its normal course.

  As a result, the yarn can have any properties, in particular also be very little uniform and be formed of any fibers, therefore, for example, natural fibers.

  wool and / or chemical fibers and / or

  fibers, and more specifically, both long-lasting fibers and

  only short fibers, for example also cotton fibers or similar short fibers. As a result, this probe is not or is only slightly sensitive to the down and can easily give it a shape such that it can

  not accumulate down to an uncomfortable extent and that

  also, it can be easily cleaned from

  vets that it carries anyway still, for example by a usual mobile blower. This probe can preferably

  to work without contact, but in the first mode of

  mentioned, it is also possible to detect the presence

  or the absence of the yarn or assembly of fibers on the

  normal course considered by means of a mechanical probe, because it is not placed on the meeting point of the two fiber assemblies, but only needs to slightly touch the wire or the assembly of fibers laterally, remotely from the meeting point, so that it does not increase

no longer the risk of rupture.

  In the spinning machine according to the second embodiment mentioned, the probing range of the probe extends beyond the normal position of the meeting point, towards the drawing bench. As a result, the probe can monitor not only the normal path of the wire, but also, simultaneously, the normal paths of the two fiber assemblies, which further facilitates the operation of the probe and makes it particularly safe. So, according to the second

  the mode of execution, normally or always, the meeting point

  Both the fiber assemblies and the wire are in the probing region of the adjoining probe and thus, in its probing region, there is always or normally a large amount of fibrous material. In

  fiber material of the yarn or at least one assembly

  Fibers may be in the probe probing range, even if, as a result of strong deviations from the meeting point, the yarn and / or a fiber assembly temporarily moves out of the probing probing range. As a result, the probe probing of fibrous material moving normally is facilitated. It can also allow

  to reduce the sensitivity of the probe.

  Preferably, the probe may be a photoelectric sensor, in particular photoelectronic, particularly advantageously a light detector. he can

  also, advantageously, present at least one optical. always

  However, we can also consider other probes, preferably

  operating without contact, such as probes

capacitive or similar.

  Non-contact probes can,

  without problems, in a particularly simple way, be con-

  in such a way that they do not tend to accumulate

  duvets and that they are easy to clean, in particular

  also connect by blowing by means of mobile blowers.

  According to an advantageous development, the photoelectric sensor

  that is designed as a photoelectric barrier, be it a one-way light barrier, a reflection light barrier or the like. In the case of a one-way light barrier, the light emitter and the light receiver are each placed face to face, while in the light barriers

  reflective, the light emitter and the light receiver

  are placed side by side and directed on a reflector

who faces them with spacing.

  However, it is also possible to give the pal-

  photoelectric fear another run, for example under

  reflective probe, it also has an emitter

  light source and a light receiver.

  The photoelectric probe also has the advantage that it does not need parts in mechanical movement and that it can be manufactured simply, economically and with ease.

  extremely safe operation.

  Since it can often take a relatively long time before a wire break is remedied, or often only the wire break is remedied after the end of a lift, and during that time fiber ribbons that continue to leave the drawing bench of the spinning station considered are no longer twisted into a wire, it is advantageous that following a fiber assembly rupture there is also a break of yarn and, preferably, that following the feeding of the fiber ribbons

  drafting bench at the spinning station is interrupted

  matically. This can be achieved if, by a break signal, a wire separating device for blocking, cutting, tearing, etc., the wire and / or a wick stopper can be controlled. The yarn separation device serves to cut the yarn which is still at the spinning station considered when a rupture of one of the two fiber assemblies has occurred. This cutting can be carried out, for example, mechanically by means of a cutting device or electrically by means of an incandescent wire or in another appropriate manner, for example also by blocking the wire, because as a result of the blockage of the wire, it occurs a

  because it is no longer brought to the winding device

  LEMENT. A chain stop device stops the movement of the two fiber ribbons (roving) arriving at the drawing bench of the spinning station in question, in any appropriate manner, for example by blocking, opening the

drawing bench, or the like.

  Examples of embodiment of the invention are

  FIG. 1 is a diagrammatic partial elevational view from the front of a spinning station of a continuous

  rings not shown in more detail, part of the equi-

  the electronic equipment of this machine, intended for

  automatic spinning of the yarn when

  toelectrics respond, being represented also in block form; FIG. 2 is a schematic plan view of the photoelectric probe device of the spinning station according to FIG. 1; FIG. 3 represents a variant of the feeler device according to FIG. 2; Figure 4 is a partial view of a variant of the spinning station according to Figure 1; FIG. 5 is an enlarged partial sectional view

  of Figure 4, seen along line 5-5, all the

  Below the meeting point 19 not shown in FIG. 6 is a diagrammatic partial elevation view from the front of a spinning station of a continuous stream.

  rings not shown in more detail, part of the equi-

  the electronic equipment of this machine, intended for

  automatic yarn spinning when photoelectric probes respond, being also represented as blocks, and

  Figure 7 is a schematic plan view of the

  positive photoelectric sensor of the spinning station according to the

Figure 6, in enlarged view.

  The spinning station 10, partially shown,

  of a continuous ring, presents a drawing bench 11

  so many pairs of rolls, for drawing two fiber ribbons 17, 17 'running side by side with spacing,

  only the pair of rollers 14 suppliers of this bench

  rabies 11 being shown. The lower roller 15 of this pair of supply rolls 14 may, in the usual way in the spinning looms, be formed by a lower cylinder extending approximately the entire length of the considered side of this spinning machine and on which is pushed at each post

  of spinning, an upper roll 16. The two individual ribbons

  fiber duels are guided with lateral spacing between them by unrepresented tape guides and go, after leaving the pair of rollers 14 suppliers, to a point

  meeting 19 which is close to and above a pal-

  photoelectric fear 21 forming a one-way photoelectric barrier (FIG. 2). These two fiber assemblies 22, 22 'which come out, still not twisted, from the pair of supply rollers 14, are twisted together, from the meeting point 19, into a thread 23. This thread 23, on its normal path which exists when the two fiber assemblies 22, 22 'are present, passes through the probe 21 arranged in position

  fixed below meeting point 19 and immediately

  subsequently, by a wire separating device 24 which may be, for example, designed as a cutter device provided with two knives. This yarn separator device can be electrically actuated and following each actuation, the probe wire 23 is cut. This actuation is triggered

  by the probe 21 when it detects a break.

  As long as the wire separator device 24 has not been actuated, the wire 23 runs through it without being cut by it. Then, the yarn 23 passes through a wire guide 25 spaced over a spindle and travels therefrom forming a ball of yarn to a spindle 26 on which is slid. detachable a tube 27 on which the wire 23 is wound into a wire winding body 29. In this path of the wire guide 25 to the pin 26, the

  wire 23 passes through a slider 30 which, dragged by the wire, turns

  not on a spinning ring 31 crossed coaxially by the

  pin 26. This spinning ring 31 is on a platform

  band 32 which performs lifting movements to pose the

  wire 23 on the tube 27 forming the winding body 29.

  If one of the two fiber assemblies 22, 22 'is torn off, the other fiber assembly performs a motion

  side and the wire 23 arrives, therefore, out of the light ray.

  of the photoelectric barrier 21 and is then twisted alone into a wire. This assembly of fibers which remains each time is designated in the drawing by 22a, 22a 'and forms a thread

  of reduced thickness accordingly.

  In the example of execution of the photoelectric probe

  21 as a light barrier, shown in Figure 2, its light emitter 42 and its light receiver 44 are arranged on the two branches of a horizontal frame 41, C-shaped in the plane. The light emitter 42 and the light receiver 44 are housed in corresponding perforations of the frame 41, forming for them

  a common box. Transmitter 42 and receiver 44 do not exceed

  lightly, by their lenses, the frame 41 pre-

  sensing a smooth outer periphery so that the frame, including the light emitter 42 and the light receiver 44 housed thereon, has on all sides a smooth outer periphery that does not provide points for the attachment of duvets, so that all this feeler 21 is

  insensitive to fouling and in particular, does not tend to

  dance to remember the duvets. In addition, because of its smooth surface, it can be cleaned simply and easily, whether mechanically or by blowing by means of a usual mobile blower, of the kind known in spinning machines for

their pneumatic cleaning.

  The light receiver 44, having, for example, a photodiode and an optic, receives in a straight path the light beam generated by the light emitter 42 having an incandescent lamp, a light-emitting diode, or the like, and an optical and converts it into a corresponding electrical signal. As long as the

  light beam is weakened by the wire 23, the electrical signal

  than output of the light receiver, which is amplified in

  an amplifier 43, is below the threshold of a de-

  threshold detector 33 connected after the amplifier 43, so that the detector provides no output signal and the separator device 24 is not actuated. If a remaining fiber assembly, such as 22a or 22a ', still happens, as a result of a breakage of the other fiber assembly - or in case of breakage of the wire 23 - out of the light beam of the barrier 21, the radiation energy received by the light receiver 44 increases, and therefore, as further described hereinafter, an electrical breaking signal is triggered and activates the separating device 24 to cut the fiber assembly 22a. 22a 'present in the form of wire and possibly can report the breakage to an operator or an automatic trolley of

  wire attachment to remedy it.

  The photoelectric barrier 21 may also be designed as a reflection light barrier, that is to say that the light emitted by the light emitter 42 is reflected on a reflector of the region of the frame which

  is located opposite and received by a light receiver dis-

  next to it The received light intensity increases

  if the thread, as a result of the break-up of an assembly,

  any fiber wadding 22, 22 'arrives out of the light beam. The threshold of the detector 33 may be adjustable by means of a common threshold selector 34 which is

  spinning stations of the machine in question or on the long side

  tudinal considered of the machine, so that the threshold of each threshold detector 33 can be adjusted according to the thickness or the number of the thread momentarily spun. FIG. 1 shows a number of additional threshold detectors 33 which are associated with other

spinning of this spinning machine.

  The spinning machine may, for example, have more than one

  hundreds of spinning stations. The threshold detector 33 is designed such that as long as the output signal of the associated light receiver 44, amplified in the amplifier 43, exceeds its indicated threshold, it provides an output signal, while it does not provide an output signal if the output signal of the amplifier 43

  is below the established threshold. We can advantageously

  see that the exceeding of the threshold is signaled only when this overshoot uninterruptedly continues a predetermined short time which is chosen so that it can no longer be caused by random deviations and vibrations of the wire 23. This period of time can also be established by the threshold selector 34. The output signal of the detector to

  threshold 33 forms the breaking signal of the spinning station con-

  dumb and is transformed and amplified in an ampli-

  pulse generator 36 and then fed to the wire separator device to initiate a cutting process, so that the wire 22a 'or 22a still present is cut by the

  separator device 24 and that thus the wire spinning

  terrompt. Instead of a photoelectric barrier, the probe 21 may also advantageously have, in many cases, another constitution, for example that of a reflection probe

  as shown in Figure 3 in relation to an example of

  execution. Here, the photosensitive probe 21 has a light emitter 42 and a light receiver 44 which are arranged

  side by side on a wing of an angle bracket 41 'fixed in position

  fixed to the frame of the loom, so that the receiver 44 still feels the wire 23 when it arrives in the light beam 42 of the transmitter 42 to such a extent that the receiver 44 responds to the light thus reflected to him

  by the thread; In this case, the amplifier 43 may advantageously

  have a pulse-forming stage and a negator component connected thereafter, so that the detector

  threshold 33 always provides a break signal for action-

  of the separating device 24 when a fiber assembly 22 or 22 'is broken and thus the wire then formed by the remaining fiber assembly 22a', 22a arrives out of

  the zone of action of the reflection probe 21.

  Instead of disposing the photoelectric probe in such a way that it palpates without contact the normal path of the wire 23, therefore, when the two fiber assemblies 22, 22 'are present, at a distance below the meeting point, it can

  also be arranged in such a way that it feels the normal

  wrong of one of the two fiber assemblies 22 or 22 'for

  detect the absence of it. This is shown schematically

  about an example in Figure 4 where a pal-

  Finger 21 scans the normal path of the fiber assembly 22 away from the meeting point 19, but here, instead of a photoelectric probe, a mechanical feeler 21

  is planned. However, of course, instead of the mechanical feeler

  21, it can also be a photoelectric probe,

  particularly advantageously a photoelectric barrier

  of a reflection probe or also, for example, 1l of a photoelectric sensor recognizing the assembly of

  fiber 22 illuminated only by the normal light of

  ambient rage of the machine room in question and which, therefore, in the latter case does not have a light emitter, or there may be provided another suitable probe which feels if the assembly of fibers 22 is absent in the normal path thereof, which it feels. If this fiber assembly 22 is absent in its normal path, a break signal is triggered. And more specifically, in this embodiment, in that the mechanical probe 21 actuates an electrical switch 55 which can preferably be only a contact switch, which therefore signals any

  contact 21 of the probe with him, and more precisely-

  In this exemplary embodiment, directly sends an electrical breaking signal to a separating device 24 which, then excited by this signal, cuts the wire 22a or 22a 'which remains in each case. This probe has in this embodiment an arm 57 rotatably mounted

  on a support 56 disposed on the not shown frame of the

  The spindle is biased by a spring 58 in the direction of the arrow A and receives, in a fork 59 disposed at the free end, the assembly of fibers 22 at a distance above the spindle. The spring 58 is only very weak, so that the arm 57 only applies with a very small force against the assembly of fibers 22 and does not disturb its movement. However, if the fiber assembly 22 or the wire 23 breaks, this arm 57 is pushed by the spring 58 to the dashed position in FIG. 5, until it is applied against the contact switch 55, so that this one

  then triggers a break signal to actuate the dis-

  positive separator 24 to cut the fiber assembly

  remaining 22a 'and possibly also to actuate a warning

  weaver to call an operator, or triggers a wagon

  wire attachment. If, on the other hand, it is not the assembly

  fiber 22 and the wire 23 which break, but the assembly

  22 ', the path of the fiber assembly 22 moves from its normal path on the pathway adjacent to the remaining fiber assembly 22a which is now the only present, so that this remaining assembly 22a forming

  a wire also ensures the pivoting of the probe 21 to the po-

  FIG. 5, in which the arm 57 is again applied against the contact switch 55 and thus also triggers the separating device 24.

  to cut the remaining fiber assembly 22a.

  The mechanical probe 21 may optionally also, in FIG. 1, take the place of the photoelectric sensor 21, or a photoelectric sensor 21 may be provided in the embodiment of FIGS. 4 and 5, instead of the probe

  mechanical 21 and the electrical switch.

  The spinning station 10 of a continuous ring,

  partially shown in Figure 6, is essentially distinguished

  ticularly from that of Figure 1 by the following. The pal-

  21, operating without contact, which can also be advantageously a photoelectric sensor, is arranged in Figure 6 so that not only it monitors the normal path of the wire 23 below the meeting point 19 to check the presence of the wire 23 , but in addition the probing range of this probe 21 extends beyond the normal position of the meeting point 19, in the direction of the drawing bench 11, so that it also monitors the normal paths of two fiber assemblies 22, 22 ', adjacent to the meeting point 19. Therefore, if the two assemblies of

  fibers 22, 22 'are present, the meeting point 19 is

  ve constantly or normally within the probing area of the photoelectric sensor 21, forming in this embodiment a one-way photoelectric barrier (Figure 7). Thus, both the fiber assemblies 22, 22 'and the wire 23 pass, on their normal paths which exist in the presence of the two assemblies of

  fibers 22, 22 ', by the probing region of the probe 21 to

  stationary and then by the wire separating device which can be designed, for example, as a device

cutter with two knives.

  If one of the two fiber assemblies 22, 22 'is torn off, the other fiber assembly performs a motion

-13 2 5 82588887

  from the side and this, as well as the wire 23, consequently come out of the light beam of the photoelectric barrier 21 and now together form a fiber assembly

  remaining 22a, 22a 'and a wire of reduced thickness as a result

accordingly.

  In the exemplary embodiment of the photoelectric sensor

  21 of FIG. 6, represented by FIG. 7, in the form of a photoelectric barrier, its light emitter 42 and its light receiver 44 are again arranged on the two branches of a horizontal frame 41, of C shape in the plan, similar to the execution example of

  Figure 2 and the indications given in this respect are valid

correspondingly.

  The light receiver 44, having, for example,

  ple, a photodiode and an optic, receives the light beam generated by the light emitter 42 having an incandescent lamp, a light emitting diode, or the like,

  and an optical and converts it into a cor-

  sponding. As long as the light ray is

  bli by the wire 23 and / or at least one fiber assembly 22, 22 ', the electrical output signal of the light receiver 44, which is amplified in an amplifier 43, is below the threshold of a threshold detector 33 connected after the amplifier 43, so that this detector provides no output signal and the separator device 24 is not actuated. However, if a fiber assembly such as 22 or 22 'breaks, the remaining fiber assembly such as 22a, 22a' and thus the wire formed therefrom only arrive out of the light beam of the light barrier 21 and the radiation energy received by the light receiver 44 increases, and hence a signal

  electric wire breaker is tripped and activates the dis-

  positive separator for cutting the fiber assembly 22a,

  22a 'present in wire form and possibly, can

  report the breakage to an operator or an automatic wire feeder for remediation. A break in the wire

  23 also triggers a break signal.

  The photoelectric barrier 21 may also be of the reflection type, that is to say that the light emitted by the emitter 42 is reflected on a reflector of the region of the frame 41 which faces, and is received by a light receiver disposed at side. The received light intensity increases correspondingly if the wire 23, because of the breakage of any fiber assembly 22, 22 ', comes out of the light beam. Other sensors operating without contact are possible too. The indications given about the

  FIG. 1 on the threshold detectors 33 and the separate device

  wire spacer 24 are valid here correspondingly.

  So, also as a result of a break in an assembly of

  fibers 22, 22 ', the remaining yarn is cut.

- R E V E N D I CATIONS-

  1. Spinning machine, preferably continuous ring, for spinning son, having multiple spinning stations in each of which two assemblies of textile fibers coming out side by side with spacing of a drawing bench, in the form of ribbons fibers not yet twisted, arrive at a

  meeting point and from it, are twisted together

  ble to form the wire that arrives at the spindle, or the like, imparting to it the torsion, at each spinning station being added a feeler which responds as well to the rupture of any one of the two fiber assemblies as to breaking of the wire formed therein, characterized in that the feeler

  (21) monitors either the normal course of one of the two assemblies

  fiber bundles (22; 22 ') above the meeting point (19), being the normal course of the yarn (23) below the point

  meeting (19), to check whether the fiber assembly con-

  dumped or the wire is present and that when the fiber assembly monitored or the wire is suddenly missing in service

  in its normal path, triggers a break signal.

  2. Spinning machine, preferably continuous ring, for spinning yarns, having multiple spinning stations in each of which two assemblies of textile fibers coming out side by side with spacing of a drawing bench, in the form of ribbons fibers not yet twisted, arrive at a

  meeting point and from it, are twisted together

  ble to form the wire that arrives at the spindle, or the like, imparting to it the torsion, at each spinning station being added a feeler which responds as well to the rupture of any one of the two fiber assemblies as to breaking of the wire formed therein, characterized in that the probe (21) is a feeler (21) designed for non-contact probing, which monitors the normal path of the wire (23) below the

  meeting point (19), to check whether the thread (23) is

  and that the probing range of this probe (21) extends beyond the normal position of the meeting point (19) of the two fiber assemblies (22, 22 '), in the direction of

drawing bench (11).

  3. Loom according to claim 1, characterized

  in that the probe (21) is a probe designed for the pal-

contactless page.

  4. A craft according to any of the claims

  1 to 3, characterized in that the probe (21) is a photoelectric sensor, preferably a light detector. 5. Loom according to claim 4, characterized in that the probe (21) is designed as a light barrier. 6. Loom according to claim 4, characterized in that the probe is designed as a reflection sensor.

  7. A craft according to any of the claims

  1 to 6, characterized in that the sensor (21) is associated with a threshold detector device (33) which responds to changes in the output signal of the probe, preferably a receiver

  light (44) of the photoelectric sensor (21), occurs

  as a result of the breakage of a fiber assembly (22;

  22 '), emitting a breaking signal.

  8. A machine according to claim 7, characterized in that the threshold detector device (33) signals a failure of a fiber assembly (22; 22 ') only if the

  value above or below the threshold, which can be

  interrupted by such a rupture (22a, 22a '), persists without

  interrupt a predetermined time.

  9. A craft according to any one of the claims

  1 to 8, characterized in that the probe (21) can control a wire separating device (24) and / or a device

wick stop.

  10. Loom according to claim 1, characterized

  in that the probe (21) is a mechanical probe.