EP3483315A1 - Roving stop device for a core yarn spinning machine and core yarn spinning machine including said roving stop device - Google Patents
Roving stop device for a core yarn spinning machine and core yarn spinning machine including said roving stop device Download PDFInfo
- Publication number
- EP3483315A1 EP3483315A1 EP17382771.8A EP17382771A EP3483315A1 EP 3483315 A1 EP3483315 A1 EP 3483315A1 EP 17382771 A EP17382771 A EP 17382771A EP 3483315 A1 EP3483315 A1 EP 3483315A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roving
- activating
- stop
- stop device
- stop element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000009987 spinning Methods 0.000 title claims description 25
- 230000003213 activating effect Effects 0.000 claims abstract description 72
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000007378 ring spinning Methods 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000005381 potential energy Methods 0.000 claims description 7
- 230000000415 inactivating effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 19
- 229920002334 Spandex Polymers 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004759 spandex Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- -1 wool Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
- D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
- D01H13/185—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only a plate moving in the nip of drafting or guiding cylinders
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
- D02G3/367—Cored or coated yarns or threads using a drawing frame
Definitions
- the present invention relates to a roving stop device for a core yarn spinning machine and to a core yarn spinning machine including a roving stop device at each spinning position.
- the present invention relates to a roving stop device that is suitable to be used for manufacturing a "Duo core" yarn spinning machine.
- the manufacture of core yarn by means of the continuous spinning process is well known.
- the manufacture of this type of yarn combines one or two continuous filaments with elastic properties on a single spool, covered with the fibres from a cotton roving or similar roving.
- the supply of the continuous filament to the drafting device of the spinning machine is carried out under tension and at a predetermined tension draft ratio via a filament guide roller acting as a guide for the continuous filament.
- a continuous filament of elastomeric material such as elastane or spandex fibre, as is the case of the Lycra ® brand. It is known that this continuous filament breaks easily, it being necessary in the event of a breakage to stop the supply of roving in time, to prevent the manufacture of a defective yarn lacking the continuous filament forming its core.
- roving stop devices for core yarn spinning machines. Many of these roving stop devices employ an electrical sensor which monitors the passage of the continuous filament, detects the breakage and sends a signal to a device located at the roving supply intake. These electrical devices present the drawback that their maintenance requires the presence of specialised personnel and increases the cost of the spinning process. Besides, the electrical sensors get dirty easily so that continuous cleaning is necessary in order to avoid defective operation of the roving stop device.
- Duo Core yarn that combines two continuous filaments with different elastic properties on a single spindle with the coating of the fibres from a cotton or similar roving.
- the continuous filaments of the core of the "Duo Core” yarn have different modulus of elasticity, so that those with lower elasticity retain those with greater elasticity, facilitating recovery of the fabric made with this yarn.
- "Duo Core” yarn allows the production of fabric with high recovery and high dimensional stability which are highly appreciated by consumers.
- roving stop devices that substantially dispense with electronic means and employs mechanical means to stop the supply of the roving upon breakage of a continuous filament. Nevertheless, these roving stop devices are intended to be used in the production of a core yarn combining a single continuous filament with a roving on a spindle position. In fact, these roving stop devices are incompatible with the production of "Duo core" yarn.
- the objective of the present invention is to provide a roving stop device for a core yarn ring-spinning machine, which resolves the indicated drawbacks, having the advantages described below.
- the present invention provides a roving stop device for a core yarn ring-spinning machine, comprising a stop element arranged to be able to act, in an active position, on a pair of roving supply rollers to stop the supply of roving when breakage of a continuous filament occurs, and a mechanism to activate the stop element when said breakage occurs, and it is characterized in that said mechanism comprises;
- the present invention has the advantage that provides a roving stop device that can be used in the production of "Duo Core" yarn.
- the claimed roving stop device dispense with electronical means and employs mechanical means to stop the supply of the roving upon breakage of either a first continuous filament or a second continuous filament.
- the claimed roving stop device includes a mechanism with a first and second means to independently activate the displacement of a same roving stop element.
- the present invention overcomes this drawback by providing a mechanical based roving stop device that dispense with electronical sensors to stop the supply of roving.
- the roving stop device of the present invention has the advantage that the element that stop the supply of roving can be activate by means of a mechanism upon breakage of either one of a first continuous filament or a second continuous filament intended to be feed to a core yarn. If only one continuous filament is to be combined with the roving in the yarn, one of the first or second activating means of the mechanism is kept inactive. But, if two continuous filaments are to be combined with the roving in the yarn, then both separate activating means are kept active.
- the first activating means comprise a first filament guide roller attached to a first activating lever, said first roller being susceptible of acting as a guide for the first continuous filament
- said second activating means comprise a second filament guide roller attached to a second activating lever, said second roller being susceptible of acting as a guide for the second continuous filament.
- the user can adapt the operation of the same roving stop device to the type of yarn that is to be manufactured in each spindle position.
- the stop element comprises a wedge arranged to be inserted, in its active position, between a pair of roving supply rollers to stop the supply of roving when breakage of either one of said first or second continuous filament occurs.
- This embodiment has the advantage that the supply of roving is stopped when a free end of the roving is grasped between the roving supply rollers due to the effect of the wedge.
- the free end of the roving is arranged within a condenser element which captures the roving and automatically directs it to the drafting rollers when the supply is resumed. Therefore, it is not necessary to manipulate the roving but merely to release the mechanism that activates the stop element, or the wedge, to recommence the spinning process.
- the roving stop device includes a mechanism that comprises a trigger for activating the movement of the stop element to its active position upon breakage of either one of said first or second continuous filaments, and said first and second activating levers are arranged to be able to cooperate with said trigger associated to said stop element.
- the mechanism comprises a first and second cam activating elements provided at one of the extremities of each of said first and second activating levers, said first and second cam activating elements being able to act on the trigger to move said stop element to its active position.
- cam activating elements may act on the trigger independently to activate the movement of the stop element to its active position.
- first and second activating levers are rotatably mounted along a same axis "Y" and, preferably, the first and second filament guide rollers are arranged faced to each other at the respective extremities of the first and second activating levers.
- This configuration allows the roving stop device to be placed in a narrow distance to simultaneously control the supply of two continuous filaments at each spinning position.
- the stop element for example, a wedge
- said supporting slide is arranged to cooperate with the first and second activating means of the mechanism.
- said wedge includes a body with a curved surface configured to surround a portion of the lower roving supply roller, and a stem to articulately join said body to the wedge supporting slide.
- the upper feed roller is a roller assembled on the pressure arm of the spinning machine. This roller is pressuredly held against the lower roller, which is the drive roller. On inserting the wedge or stop element between the two rollers, the upper roller is elevated and ceases to make contact with the lower roller, and the roving is grasped.
- the supporting slide comprises a plurality of grooves to attach the stem of the wedge in a plurality of positions, each of said grooves determining a predetermined position of the stop element in accordance with the distance separating the bar holding the pressure arm from the feed rollers.
- said supporting slide is provided with trigger retaining means and is susceptible to accumulate potential energy derived from the compression force applied to a spring. This potential energy may be transmitted as movement to the stop element on cessation of the tension of either one of said first and second continuous filaments on the first or second roller.
- the trigger retaining means of the supporting slide comprise a notch for the trigger and a spring arranged to be compressed by manually displacing the supporting slide until the trigger becomes locked in the aforementioned notch.
- the roving stop device comprises a housing provided with detecting means for detecting the displacement of the stop element to the active position when the tension of either one of the first or the second continuous filament ceases, and a lamp provided to generate a light signal when said detecting means detect the displacement of the stop element to the active position.
- a sensor may cooperate with a magnet installed on the supporting slide.
- the magnet activates the sensor and the lamp (LED) is illuminated.
- the roving stop device comprises a clamp to secure the housing to a bar bearing a plurality of pressure arms of a core yarn spinning machine.
- Each of these pressure arms is configured so as to pressuredly hold the upper roving feed roller against the lower roller.
- continuous filament should be understood to be a filament of textile fibre of an indefinite length, preferably a length of synthetic fibre obtained by extrusion, for example a filament of elastane or of polyester.
- Roving or “bundle of roving fibres” should be understood to be a bundle of cut cotton, wool, or viscose fibres, or another similar natural or artificial cut fibre, intended for the coating of one or more continuous filaments in the spinning of core yarn.
- Core yarn should be understood to be a yarn combining a core of one, two or as many as three continuous filaments with a bundle of roving fibres covering the filaments.
- Duo core yarn should be understood to be a yarn combining a core of two continuous filaments with a bundle of roving fibres covering the filaments.
- the present invention relates to a roving stop device 1 comprising a stop element 2 arranged to be able to act, in an active position, on a pair of roving supply rollers 3 to stop the supply of roving 5 when breakage of a continuous filament 4a, 4b occurs.
- the described roving stop device 1 is applied to the manufacture of core yarn by means of a continuous ring spinning machine (not represented) and, in particular, to the manufacture of "Duo Core" yarn, i.e., a yarn that combines two continuous filaments 4a, 4b and a bundle of roving 5 fibres intended to cover the said continuous filaments 4a, 4b.
- the claimed roving stop device 1 comprises a mechanism to activate the stop element 2 when breakage of either one of a first continuous filament 4a or second continuous filament 4b occurs.
- This mechanism comprises a first and second means to independently active the displacement of the same roving stop element 2.
- the first activating means comprises a first activating lever 6a and a second activating lever 6b.
- the free ends of both activating levers 6a, 6b are each provided with a first filament guide roller 7a and a second filament guide roller 7b, respectively.
- These filament guide rollers 7a, 7b act as a guide for the two continuous filaments 4a, 4b intended to be supplied to the drafting train that manufacture the core yarn 8 (see figure 4 ).
- both activating levers 6a, 6b are rotatably mounted along a same axis "Y" and are arranged to independently cooperate with a trigger 9 via first and second cam elements 10a, 10b (see, figure 6 ).
- the stop element 2 is articulately mounted on a supporting slide 11 provided with a notch 12 for the trigger 9 and with a spring 13 arranged to be compressed by manually displacing the supporting slide 11 until the trigger 9 becomes locked in the aforementioned notch 12 (see, figure 3a ).
- either one of the first or second activating levers 6a, 6b descend to a lower position and make the trigger 9 to be released from the interior of the notch 12 via either one of the first or second activating cam elements 10a, 10b.
- the potential energy accumulated by the supporting slide 11 from the compression force applied to the spring 13 is transmitted as movement to the supporting slide 11 and the stop element 2 on releasing the trigger 9 from the interior of the notch 12.
- the stop element 2 acts on the roving supply rollers 3 to stop the supply of roving 5 (see, figures 3b and 5 ).
- Figure 3a shows the roving stop device 1 with the supporting slide 11 in a forward position and the stop element 2 in a non-working position to enable the supply of roving 5.
- the tension of one of said continuous filaments 4a on the first filament guide roller 7a maintains the first activating lever 6a in an elevated position, enabling the supporting slide 11 to remain locked in a forward position, accumulating elastic potential energy derived from the compression force applied to the spring 13.
- the potential energy accumulated by the spring 13 activates the recoil of the supporting slide 11 when the trigger 9 is freed due to the occurrence of a breakage of one of said continuous filaments 4a, 4b (see, figure 3b ).
- the stop element 2 presents a body 2a with a curved surface configured in order to surround a portion of the curved surface of the lower roving supply roller 3, and a stem 2b articulately attached to the supporting slide 11.
- a portion of the body 2a with a curved surface is inserted between the lower and upper roving supply rollers 3.
- the upper roller is elevated and ceases to make contact with the lower roller, interrupting the supply of roving 5 which, being grasped, is separated or cut prior to entering the drafting rollers 14.
- the free extremity of the roving 5 is captured within a condenser element 15, precisely at the intake of the drafting rollers 14. This extremity may be fed automatically in order to continue with the spinning process once the broken filament 4a or 4b has been repaired. To achieve this, the supporting slide 11 must be manually moved so that the stop element 2 frees the roving supply rollers 3.
- the roving stop device 1 comprises means for inactivating either one or both of the first activating lever 6a and second activating lever 6b, and according to the illustrated embodiment, said inactivating means comprise a holding element 16 arranged to fasten either one or both of said first activating lever 6a and said second activating lever 6a in order to keep either one or both of said first or second activating levers 6a, 6b inactive so as not to cause the displacement of the stop element 2. Thanks to this feature, the user can adapt the operation of the same roving stop device 1 to the type of yarn to be manufactured in each spindle position.
- FIG. 4 shows a schematic representation of several spindle positions of a "Duo core" yarn ring spinning machine.
- Each spindle position incorporates a roving stop device 1 attached to an arm-bearing bar 17.
- This representation shows the supply of two continuous filaments 4a, 4b via its corresponding first and second filament guide rollers 7a, 7b.
- each roving stop device 1 includes a holding element 16 arranged to not fasten neither the first activating lever 6a nor the second activating lever 6b so as to keep both activating levers 6a, 6b active.
- first and second filament rollers 7a, 7b are arranged on the extremities of the activating levers 6a, 6b faced to each other so that the supply of both continuous filaments 4a, 4b takes place via the said guide rollers 7a, 7b in a narrow distance.
- Figures 1 and 2 show a perspective and rear view of an embodiment of the roving stop device 1 wherein the mentioned holding element 16 is arranged to fasten only one of the activating levers 6a to keep said activating lever 6a inactive while the other activating lever 6b is kept in position by the tension of the continuous filament 4a on its corresponding filament guide roller 7a.
- the roving stop device 1 is adapted to manufacture a core yarn combining only one continuous filament 4a and a bundle of roving 5 in the yarn.
- each of the activating levers 6a, 6b is arranged to not being fasten by the holding element 16 as it is shown in figure 4 .
- the stop roving device 1 comprises a housing 18 provided with a clamp 19 to secure the device to a bar 17 of the spinning machine.
- the distance separating the bar 17 bearing the arms from the supply rollers 3 may vary, depending on the type of machine.
- the supporting slide 11 supporting the stop element 2 features a plurality of grooves 20 to attach the stem 2b of the stop element 2 in a plurality of positions in accordance with the distance chosen.
- Each roving stop device 1 comprises a sensor (not represented) to detect the displacement of the supporting slide 11 when the tension of either one of the first or the second continuous filaments 4a, 4b ceases, and a lamp (not represented) provided to generate a light signal when said sensor detects the displacement of the stop element 2 to the active position.
- the sensor may cooperate with a magnet installed on the supporting slide 11. When the supporting slide is displaced in order to activate the stop element 2, the magnet activates the sensor and the lamp (LED) is illuminated to warn the user of the machine.
- This sensor may also send a signal to collective warning lights (not portrayed) located at both extremities of the spinning machine.
- the roving stop device 1 claimed enables stopping the supply of roving 5 when breakage of either one or two continuous filaments 4a, 4b occurs, by strictly mechanical means.
- the roving stop device 3 may dispense with electric sensors to detect the breakage of two continuous filaments 4a, 4b during manufacture of "Duo Core" yarn.
Abstract
Description
- The present invention relates to a roving stop device for a core yarn spinning machine and to a core yarn spinning machine including a roving stop device at each spinning position. In particular, the present invention relates to a roving stop device that is suitable to be used for manufacturing a "Duo core" yarn spinning machine.
- The manufacture of core yarn by means of the continuous spinning process is well known. The manufacture of this type of yarn combines one or two continuous filaments with elastic properties on a single spool, covered with the fibres from a cotton roving or similar roving. The supply of the continuous filament to the drafting device of the spinning machine is carried out under tension and at a predetermined tension draft ratio via a filament guide roller acting as a guide for the continuous filament.
- For the manufacture of core yarn it is common to employ a continuous filament of elastomeric material, such as elastane or spandex fibre, as is the case of the Lycra ® brand. It is known that this continuous filament breaks easily, it being necessary in the event of a breakage to stop the supply of roving in time, to prevent the manufacture of a defective yarn lacking the continuous filament forming its core.
- In the state of the art, there exists roving stop devices for core yarn spinning machines. Many of these roving stop devices employ an electrical sensor which monitors the passage of the continuous filament, detects the breakage and sends a signal to a device located at the roving supply intake. These electrical devices present the drawback that their maintenance requires the presence of specialised personnel and increases the cost of the spinning process. Besides, the electrical sensors get dirty easily so that continuous cleaning is necessary in order to avoid defective operation of the roving stop device.
- It is known the production of the so-called "Duo Core" yarn that combines two continuous filaments with different elastic properties on a single spindle with the coating of the fibres from a cotton or similar roving. The continuous filaments of the core of the "Duo Core" yarn have different modulus of elasticity, so that those with lower elasticity retain those with greater elasticity, facilitating recovery of the fabric made with this yarn. As a result, "Duo Core" yarn allows the production of fabric with high recovery and high dimensional stability which are highly appreciated by consumers.
- There exists roving stop devices for the production of the highly appreciated "Duo Core" yarn. These devices employ electrical sensors which monitor the passage of the first and second continuous filament, detect the breakage of either one of said continuous filaments and send a signal to a device located at the roving supply intake. However, in the production of "Duo Core" yarn, the spindle gauge or distance between spindle positions is so narrow that it makes difficult handling and maintenance of the electrical sensors.
- There are known roving stop devices that substantially dispense with electronic means and employs mechanical means to stop the supply of the roving upon breakage of a continuous filament. Nevertheless, these roving stop devices are intended to be used in the production of a core yarn combining a single continuous filament with a roving on a spindle position. In fact, these roving stop devices are incompatible with the production of "Duo core" yarn.
- It is therefore necessary to provide a solution to the state of the art which covers the gaps found therein, by the provision of a roving stop device for the production of "Duo core" yarn which overcomes the above-mentioned shortcomings of the existent roving stop devices.
- The objective of the present invention is to provide a roving stop device for a core yarn ring-spinning machine, which resolves the indicated drawbacks, having the advantages described below.
- In accordance with this objective, according to a first aspect, the present invention provides a roving stop device for a core yarn ring-spinning machine, comprising a stop element arranged to be able to act, in an active position, on a pair of roving supply rollers to stop the supply of roving when breakage of a continuous filament occurs, and a mechanism to activate the stop element when said breakage occurs, and it is characterized in that said mechanism comprises;
- first activating means for displacing the stop element towards the active position upon breakage of a first continuous filament intended to be fed to a core yarn, and
- second activating means for displacing the stop element towards the active position upon breakage of a second continuous filament intended to be fed to said same core yarn.
- According to a second aspect, the present invention provides a core yarn spinning machine, preferably, a continuous core ring-spinning machine, characterised in that it comprises at each spinning position, the claimed roving stop device to stop the supply of a roving in the event of breakage of either one of said first continuous filament or said second continuous filament.
- The present invention has the advantage that provides a roving stop device that can be used in the production of "Duo Core" yarn. The claimed roving stop device dispense with electronical means and employs mechanical means to stop the supply of the roving upon breakage of either a first continuous filament or a second continuous filament. The claimed roving stop device includes a mechanism with a first and second means to independently activate the displacement of a same roving stop element.
- As prior mentioned, the electrical devices present the drawback that they get dirty easily and their maintenance requires the presence of specialised personnel and increases the cost of the spinning process. The present invention overcomes this drawback by providing a mechanical based roving stop device that dispense with electronical sensors to stop the supply of roving.
- Indeed, the roving stop device of the present invention has the advantage that the element that stop the supply of roving can be activate by means of a mechanism upon breakage of either one of a first continuous filament or a second continuous filament intended to be feed to a core yarn. If only one continuous filament is to be combined with the roving in the yarn, one of the first or second activating means of the mechanism is kept inactive. But, if two continuous filaments are to be combined with the roving in the yarn, then both separate activating means are kept active.
- In accordance with a preferred embodiment, the first activating means comprise a first filament guide roller attached to a first activating lever, said first roller being susceptible of acting as a guide for the first continuous filament, and said second activating means comprise a second filament guide roller attached to a second activating lever, said second roller being susceptible of acting as a guide for the second continuous filament. The activation of the stop element takes place when the tension of either one of said first or second continuous filaments on the first or second roller ceases.
- Advantageously, the claimed roving stop device comprises means for inactivating either one or both of the first activating means or second activating means, and according to the above mentioned preferred embodiment, the inactivating means comprise a holding element arranged to fasten either one or both of said first activating lever or said second activating lever in order to keep either one or both of said first or second activating levers inactive (i.e. so as not to fall upon breakage of the filament).
- Thanks to this feature, the user can adapt the operation of the same roving stop device to the type of yarn that is to be manufactured in each spindle position.
- For one embodiment, the stop element comprises a wedge arranged to be inserted, in its active position, between a pair of roving supply rollers to stop the supply of roving when breakage of either one of said first or second continuous filament occurs.
- This embodiment has the advantage that the supply of roving is stopped when a free end of the roving is grasped between the roving supply rollers due to the effect of the wedge. In fact, the free end of the roving is arranged within a condenser element which captures the roving and automatically directs it to the drafting rollers when the supply is resumed. Therefore, it is not necessary to manipulate the roving but merely to release the mechanism that activates the stop element, or the wedge, to recommence the spinning process.
- Preferably, the roving stop device includes a mechanism that comprises a trigger for activating the movement of the stop element to its active position upon breakage of either one of said first or second continuous filaments, and said first and second activating levers are arranged to be able to cooperate with said trigger associated to said stop element.
- For a particular implementation of the device, the mechanism comprises a first and second cam activating elements provided at one of the extremities of each of said first and second activating levers, said first and second cam activating elements being able to act on the trigger to move said stop element to its active position.
- These cam activating elements may act on the trigger independently to activate the movement of the stop element to its active position.
- Advantageously, the first and second activating levers are rotatably mounted along a same axis "Y" and, preferably, the first and second filament guide rollers are arranged faced to each other at the respective extremities of the first and second activating levers.
- This configuration allows the roving stop device to be placed in a narrow distance to simultaneously control the supply of two continuous filaments at each spinning position.
- For one embodiment, the stop element, for example, a wedge, is articulately mounted on a supporting slide and said supporting slide is arranged to cooperate with the first and second activating means of the mechanism. Preferably, said wedge includes a body with a curved surface configured to surround a portion of the lower roving supply roller, and a stem to articulately join said body to the wedge supporting slide.
- The upper feed roller is a roller assembled on the pressure arm of the spinning machine. This roller is pressuredly held against the lower roller, which is the drive roller. On inserting the wedge or stop element between the two rollers, the upper roller is elevated and ceases to make contact with the lower roller, and the roving is grasped.
- In accordance with an embodiment, the supporting slide comprises a plurality of grooves to attach the stem of the wedge in a plurality of positions, each of said grooves determining a predetermined position of the stop element in accordance with the distance separating the bar holding the pressure arm from the feed rollers.
- Advantageously, said supporting slide is provided with trigger retaining means and is susceptible to accumulate potential energy derived from the compression force applied to a spring. This potential energy may be transmitted as movement to the stop element on cessation of the tension of either one of said first and second continuous filaments on the first or second roller.
- According to one embodiment, the trigger retaining means of the supporting slide comprise a notch for the trigger and a spring arranged to be compressed by manually displacing the supporting slide until the trigger becomes locked in the aforementioned notch.
- Preferably, the roving stop device comprises a housing provided with detecting means for detecting the displacement of the stop element to the active position when the tension of either one of the first or the second continuous filament ceases, and a lamp provided to generate a light signal when said detecting means detect the displacement of the stop element to the active position.
- For example, a sensor may cooperate with a magnet installed on the supporting slide. When the slide is displaced in order to activate the stop element, the magnet activates the sensor and the lamp (LED) is illuminated.
- Advantageously, the roving stop device comprises a clamp to secure the housing to a bar bearing a plurality of pressure arms of a core yarn spinning machine. Each of these pressure arms is configured so as to pressuredly hold the upper roving feed roller against the lower roller.
- In the present invention, "continuous filament" should be understood to be a filament of textile fibre of an indefinite length, preferably a length of synthetic fibre obtained by extrusion, for example a filament of elastane or of polyester.
- "Roving" or "bundle of roving fibres" should be understood to be a bundle of cut cotton, wool, or viscose fibres, or another similar natural or artificial cut fibre, intended for the coating of one or more continuous filaments in the spinning of core yarn.
- "Core yarn" should be understood to be a yarn combining a core of one, two or as many as three continuous filaments with a bundle of roving fibres covering the filaments.
- "Duo core" yarn should be understood to be a yarn combining a core of two continuous filaments with a bundle of roving fibres covering the filaments.
- For a better understanding of that which is described herein, a set of drawings is attached which, schematically and by way of a non-limiting example only, represent a practical case of embodiment.
- In said drawings:
-
Figure 1 is a perspective view of an embodiment of the roving stop device. -
Figure 2 is a rear view of the roving stop device offigure 1 . -
Figure 3a is a schematic representation of a longitudinal section of the drafting device of a core yarn spinning machine showing the mechanism of the roving stop device offigure 1 which activates the displacement of the stop element. This representation shows the supply of one of the continuous filaments via the corresponding filament guide roller which acts as a guide for said filament at the extremity of its corresponding activating lever. In thisfigure 3a , the stop element and the supporting slide are in a non-activate resting position (continuous filament in tension over the guide roller keeping the activating lever in an elevated position). -
Figure 3b is a schematic representation of a longitudinal section of the drafting device of a core yarn spinning machine showing the mechanism of the roving stop device offigure 1 which activates the displacement of the stop element. This representation shows the supply of one of the continuous filaments via the corresponding filament guide roller which acts as a guide for said filament at the extremity of its corresponding activating lever. In thisfigure 3b , the stop element and the supporting slide are in an activate position upon breakage of the continuous filament. -
Figure 4 is a schematic representation of several spindle positions of a "Duo core" yarn ring spinning machine, each spindle position incorporating a roving stop device attached to the arm-bearing bar. This representation shows the supply of two continuous filaments via the first and second filament guide rollers of each roving stop device. -
Figure 5 is a longitudinal section of the roving stop device offigure 1 that schematically shows the mode of operation of the device when breakage of the continuous filament occurs. -
Figure 6 is a schematic partial cross section of the roving stop device offigure 1 showing a portion of the first and second activating levers rotatably mounted along a same axis "Y, and the first and second cam activating elements provided at the extremities of said first and second activating levers. - A preferred embodiment of the present invention is described below, making reference to
figures 1 to 6 . - As shown in the appended Figures, the present invention relates to a
roving stop device 1 comprising astop element 2 arranged to be able to act, in an active position, on a pair ofroving supply rollers 3 to stop the supply of roving 5 when breakage of acontinuous filament roving stop device 1 is applied to the manufacture of core yarn by means of a continuous ring spinning machine (not represented) and, in particular, to the manufacture of "Duo Core" yarn, i.e., a yarn that combines twocontinuous filaments continuous filaments - The claimed
roving stop device 1 comprises a mechanism to activate thestop element 2 when breakage of either one of a firstcontinuous filament 4a or secondcontinuous filament 4b occurs. This mechanism comprises a first and second means to independently active the displacement of the sameroving stop element 2. - For the illustrated embodiment, the first activating means comprises a first activating
lever 6a and a second activatinglever 6b. The free ends of both activatinglevers filament guide roller 7a and a secondfilament guide roller 7b, respectively. Thesefilament guide rollers continuous filaments figure 4 ). - For the same illustrated embodiment, the opposite extremities of both activating
levers trigger 9 via first andsecond cam elements figure 6 ). - As may be seen in
figures 3a ,3b andfigure 5 , thestop element 2 is articulately mounted on a supportingslide 11 provided with anotch 12 for thetrigger 9 and with aspring 13 arranged to be compressed by manually displacing the supportingslide 11 until thetrigger 9 becomes locked in the aforementioned notch 12 (see,figure 3a ). - When the tension of either one of said first and second
continuous filaments filament guide rollers levers trigger 9 to be released from the interior of thenotch 12 via either one of the first or second activatingcam elements slide 11 from the compression force applied to thespring 13 is transmitted as movement to the supportingslide 11 and thestop element 2 on releasing thetrigger 9 from the interior of thenotch 12. In its active position, thestop element 2 acts on theroving supply rollers 3 to stop the supply of roving 5 (see,figures 3b and5 ). -
Figure 3a shows theroving stop device 1 with the supportingslide 11 in a forward position and thestop element 2 in a non-working position to enable the supply of roving 5. As may be seen in thisfigure 3a , the tension of one of saidcontinuous filaments 4a on the firstfilament guide roller 7a maintains the first activatinglever 6a in an elevated position, enabling the supportingslide 11 to remain locked in a forward position, accumulating elastic potential energy derived from the compression force applied to thespring 13. As has been mentioned above, the potential energy accumulated by thespring 13 activates the recoil of the supportingslide 11 when thetrigger 9 is freed due to the occurrence of a breakage of one of saidcontinuous filaments figure 3b ). - In the embodiment described, the
stop element 2 presents abody 2a with a curved surface configured in order to surround a portion of the curved surface of the lowerroving supply roller 3, and astem 2b articulately attached to the supportingslide 11. In its active position (seefigure 3b ), a portion of thebody 2a with a curved surface is inserted between the lower and upperroving supply rollers 3. In this position, the upper roller is elevated and ceases to make contact with the lower roller, interrupting the supply of roving 5 which, being grasped, is separated or cut prior to entering the draftingrollers 14. - As may be seen in
figure 3b , the free extremity of the roving 5 is captured within acondenser element 15, precisely at the intake of the draftingrollers 14. This extremity may be fed automatically in order to continue with the spinning process once thebroken filament slide 11 must be manually moved so that thestop element 2 frees theroving supply rollers 3. - As stated in the description of the invention, preferably, the
roving stop device 1 comprises means for inactivating either one or both of the first activatinglever 6a and second activatinglever 6b, and according to the illustrated embodiment, said inactivating means comprise a holdingelement 16 arranged to fasten either one or both of said first activatinglever 6a and said second activatinglever 6a in order to keep either one or both of said first or second activatinglevers stop element 2. Thanks to this feature, the user can adapt the operation of the sameroving stop device 1 to the type of yarn to be manufactured in each spindle position. -
Figure 4 shows a schematic representation of several spindle positions of a "Duo core" yarn ring spinning machine. Each spindle position incorporates aroving stop device 1 attached to an arm-bearingbar 17. This representation shows the supply of twocontinuous filaments filament guide rollers figure 4 , eachroving stop device 1 includes a holdingelement 16 arranged to not fasten neither the first activatinglever 6a nor the second activatinglever 6b so as to keep both activatinglevers second filament rollers levers continuous filaments guide rollers -
Figures 1 and2 show a perspective and rear view of an embodiment of theroving stop device 1 wherein the mentioned holdingelement 16 is arranged to fasten only one of the activatinglevers 6a to keep said activatinglever 6a inactive while the other activatinglever 6b is kept in position by the tension of thecontinuous filament 4a on its correspondingfilament guide roller 7a. Thus, in thesefigures 1 and2 theroving stop device 1 is adapted to manufacture a core yarn combining only onecontinuous filament 4a and a bundle of roving 5 in the yarn. To adapt the same stoproving device 1 to the manufacture of "Duo Core"yarn 8, each of the activatinglevers element 16 as it is shown infigure 4 . - In the embodiment described, the stop
roving device 1 comprises ahousing 18 provided with aclamp 19 to secure the device to abar 17 of the spinning machine. The distance separating thebar 17 bearing the arms from thesupply rollers 3 may vary, depending on the type of machine. For this reason, the supportingslide 11 supporting thestop element 2 features a plurality ofgrooves 20 to attach thestem 2b of thestop element 2 in a plurality of positions in accordance with the distance chosen. - Each
roving stop device 1 comprises a sensor (not represented) to detect the displacement of the supportingslide 11 when the tension of either one of the first or the secondcontinuous filaments stop element 2 to the active position. For example, the sensor may cooperate with a magnet installed on the supportingslide 11. When the supporting slide is displaced in order to activate thestop element 2, the magnet activates the sensor and the lamp (LED) is illuminated to warn the user of the machine. This sensor may also send a signal to collective warning lights (not portrayed) located at both extremities of the spinning machine. - As has been mentioned in the description of the invention, the
roving stop device 1 claimed enables stopping the supply of roving 5 when breakage of either one or twocontinuous filaments roving stop device 3 may dispense with electric sensors to detect the breakage of twocontinuous filaments - While the foregoing description and representation has been with reference to particular embodiments of the present invention, it will be evident that a person skilled in the art will be able to introduce multiple variations or modifications, or replace the details mentioned herein by other technically equivalent details without departing from the scope of protection defined by the appended claims. For example, although reference has been made in the present specification to a
roving stop device 1 wherein thestop element 2 is configured in the shape of a wedge, thesame stop element 2 may be configured to act on the roving supply rollers in a different way.
Claims (15)
- Roving stop device (1) for a core yarn ring-spinning machine, comprising a stop element (2) arranged to be able to act, in an active position, on a pair of roving supply rollers (3) to stop the supply of roving (5) when breakage of a continuous filament (4a, 4b) occurs, and a mechanism to activate the stop element (2) when said breakage occurs, characterized in that said mechanism comprises first activating means (6a,7a,10a) for displacing said stop element (2) towards the active position upon breakage of a first continuous filament (4a) intended to be fed to a core yarn (8), and second activating means (6b,7b,10b) for displacing said stop element (2) towards the active position upon breakage of a second continuous filament (4b) intended to be fed to said same core yarn (8).
- Roving stop device (1) according to claim 1, wherein said first activating means comprise a first filament guide roller (7a) attached to a first activating lever (6a), said first filament guide roller (7a) being susceptible of acting as a guide for the first continuous filament (4a), and wherein said second activating means comprise a second filament guide roller (7b) attached to a second activating lever (6b), said second filament guide roller (7b) being susceptible of acting as a guide for the second continuous filament (4b), the activation of said stop element (2) taking place when the tension of either one of said first or second continuous filaments (4a, 4b) on the first or second filament guide rollers (7a,7b) ceases.
- Roving stop device (1) according to claim 2, wherein said mechanism comprises a trigger (9) for activating the movement of said stop element (2) to its active position upon breakage of either one of said first or second continuous filaments (4a, 4b), and wherein said first and second activating levers (6a, 6b) are arranged to be able to cooperate with said trigger (9) associated to said stop element (2).
- Roving stop device (1) according to claim any of claims 2 to 3, wherein said first and second activating levers (6a,6b) are rotatably mounted along a same axis "Y".
- Roving stop device (1) according to claim 4, wherein said first and second filament guide rollers (7a, 7b) are arranged faced to each other at the respective extremities of said first and second activating levers (6a, 6b).
- Roving stop device (1) according to any of claims 1 to 5, wherein said stop element (2) is articulately mounted on a supporting slide (11) and said supporting slide (11) is arranged to cooperate with said first and second activating means.
- Roving stop device (1) according to any of claims 2 to 6, wherein said mechanism comprises a first and second cam activating elements (10a, 10b) provided at one of the extremities of each of said first and second activating levers (6a, 6b), said first and second cam activating elements (10a, 10b) being able to act on a trigger (9) to move said stop element (2) to its active position.
- Roving stop device (1) according to claims 3 and 5, wherein said supporting slide (11) is provided with trigger retaining means (12).
- Roving stop device (1) according to any of claims 5 to 7, wherein said supporting slide (11) is susceptible to accumulate potential energy derived from the compression force applied to a spring (13) and susceptible to transmit, in an active position, the potential energy as movement to the stop element (2) on cessation of the tension of either one of said first and second continuous filaments (4a, 4b) on the first or second filament guide rollers (7a, 7b).
- Roving stop device (1) according to claims 8 and 9, wherein said trigger retaining means comprise a notch (12) for the trigger (9) and a spring (13) arranged to be compressed by manually displacing the supporting slide (11) until the trigger (9) becomes locked in the aforementioned notch (12).
- Roving stop device (1) according to any of claims 1 to 10, wherein said stop element comprises a wedge (2) arranged to be inserted, in its active position, between a pair of roving supply rollers (3) to stop the supply of roving (5) when breakage of either one of said first or second continuous filaments (4a, 4b) occurs.
- Roving stop device (1) according to any of claims 1 to 10, wherein it comprises means (16) for inactivating either one of said first activating means (6a,7a, 10a) or said second activating means (6b, 7b, 10b).
- Roving stop device (1) according to claims 2 and 12, wherein said means for inactivating either said first activating means or said second activating means, comprise a holding element (16) arranged to fasten either one of said first activating lever (6a) or said second activating lever (6b) in order to keep either one of said first or second activating levers (6a, 6b) inactive so as not to cause the displacement of the stop element (2).
- Roving stop device (1) according to any of claims 1 to 13, wherein it comprises means for detecting the displacement of the stop element (2) to the active position when the tension of either the first or the second continuous filament (4a, 4b) ceases, and a lamp provided to generate a light signal when said detecting means detect the displacement of the stop element (2) to the active position.
- A continuous core yarn spinning machine, characterised in that it comprises, at each spinning position, a roving stop device (1) as claimed in any of claims 1 to 14 to stop the supply of a roving (5) in the event of breakage of either one of a first continuous filament (4a) or second continuous filament (4b).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17382771.8A EP3483315B1 (en) | 2017-11-14 | 2017-11-14 | Roving stop device for a core yarn spinning machine and core yarn spinning machine including said roving stop device |
ES201831753U ES1223635Y (en) | 2017-11-14 | 2018-11-14 | DETENTION DEVICE OF A MECHANINE FOR A THREADING MACHINE THREAD CORE AND A THREADING MACHINE OF THREADING THREAD THAT INCLUDES SUCH DEVICE DETENTION DEVICE |
CN201821874180.6U CN209669433U (en) | 2017-11-14 | 2018-11-14 | Rove arrestment and continuous core yarn machine for heart yarn ring spinner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17382771.8A EP3483315B1 (en) | 2017-11-14 | 2017-11-14 | Roving stop device for a core yarn spinning machine and core yarn spinning machine including said roving stop device |
Publications (2)
Publication Number | Publication Date |
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EP3483315A1 true EP3483315A1 (en) | 2019-05-15 |
EP3483315B1 EP3483315B1 (en) | 2022-06-01 |
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Application Number | Title | Priority Date | Filing Date |
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EP17382771.8A Active EP3483315B1 (en) | 2017-11-14 | 2017-11-14 | Roving stop device for a core yarn spinning machine and core yarn spinning machine including said roving stop device |
Country Status (3)
Country | Link |
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EP (1) | EP3483315B1 (en) |
CN (1) | CN209669433U (en) |
ES (1) | ES1223635Y (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11598027B2 (en) | 2019-12-18 | 2023-03-07 | Patrick Yarn Mills, Inc. | Methods and systems for forming a composite yarn |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107099899A (en) * | 2016-07-12 | 2017-08-29 | 江苏乐华自动化科技有限公司 | The adaptive disconnected core protection quick reaction device of Minimal Tension covering yarn, method and spinning machine |
EP3231905A1 (en) * | 2014-12-12 | 2017-10-18 | Pinter Caipo, S.A.U. | Device for interrupting the supply of a bundle of fibres, method for interrupting the supply of a bundle of fibres, and machine for spinning a core thread, comprising said device |
-
2017
- 2017-11-14 EP EP17382771.8A patent/EP3483315B1/en active Active
-
2018
- 2018-11-14 CN CN201821874180.6U patent/CN209669433U/en active Active
- 2018-11-14 ES ES201831753U patent/ES1223635Y/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3231905A1 (en) * | 2014-12-12 | 2017-10-18 | Pinter Caipo, S.A.U. | Device for interrupting the supply of a bundle of fibres, method for interrupting the supply of a bundle of fibres, and machine for spinning a core thread, comprising said device |
CN107099899A (en) * | 2016-07-12 | 2017-08-29 | 江苏乐华自动化科技有限公司 | The adaptive disconnected core protection quick reaction device of Minimal Tension covering yarn, method and spinning machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11598027B2 (en) | 2019-12-18 | 2023-03-07 | Patrick Yarn Mills, Inc. | Methods and systems for forming a composite yarn |
Also Published As
Publication number | Publication date |
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ES1223635U (en) | 2019-01-24 |
EP3483315B1 (en) | 2022-06-01 |
CN209669433U (en) | 2019-11-22 |
ES1223635Y (en) | 2019-04-16 |
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