EP3115489A1 - Fiber bundle feed stopping device for spinning frame - Google Patents
Fiber bundle feed stopping device for spinning frame Download PDFInfo
- Publication number
- EP3115489A1 EP3115489A1 EP16175183.9A EP16175183A EP3115489A1 EP 3115489 A1 EP3115489 A1 EP 3115489A1 EP 16175183 A EP16175183 A EP 16175183A EP 3115489 A1 EP3115489 A1 EP 3115489A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fiber bundle
- teeth
- roving
- feed
- stopping device
- 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.)
- Granted
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 126
- 238000009987 spinning Methods 0.000 title claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000007378 ring spinning Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 238000010040 friction spinning Methods 0.000 description 1
- 230000001105 regulatory effect Effects 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
- D01H13/188—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 by cutting or clamping yarns or rovings
-
- 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
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
Definitions
- the present invention relates to a fiber bundle feed stopping device for a spinning frame that stops feeding a drafting device with a fiber bundle.
- a spinning frame spins yarn from a roving or a sliver.
- spinning is simultaneously performed by a plurality of spindles.
- the yarn-broken spindle During spinning, when a yarn breaks, spinning is stopped at the spindle where the yarn was broken (hereafter referred to as "the yarn-broken spindle") but continued at the other spindles.
- One type of a spinning frame continues to feed a drafting device that corresponds to the yarn-broken spindle with a fiber bundle that is drawn in and collected when discharged from the drafting device.
- There is another type of spinning frame that includes a stopping device to stop feeding the drafting device that corresponds to the yarn-broken spindle with a fiber bundle.
- Japanese Laid-Patent Publication No. 48-4727 describes a roving cutting device that includes a plurality of long tapered needles.
- the roving cutting device of Japanese Laid-Open Patent Publication No. 48-4727 , to stop feeding a roving to the drafting device corresponding to the yarn-broken spindle, the roving is cut at the upstream side of the drafting device in the feed direction of the roving. More specifically, the roving cutting device performs an operation in which the tapered needles pierce the roving fed to the drafting device corresponding to the yarn-broken spindle at the upstream side of the drafting device. In this case, the drafting device is continuously driven, and the roving is moved along the tapered needles toward the base of each needle. This keeps the tapered needles in the roving so that the roving is not released from the needles.
- the roving at the upstream side of the tapered needles is blocked (obstructed) by the tapered needles, and the roving at the downstream side of the tapered needles is pulled by the drafting device and cut by the tapered needles. This stops feeding the drafting device of the yarn-broken spindle with the roving.
- the tapered needles pierce the roving and block the fed roving with the tapered needles to cut the roving. Accordingly, the movement resistance produced between the roving and the tapered needles increases the load applied to the tapered needles. Thus, when the roving passes through the tapered needles, the tapered needles are apt to deform and break. Further, since the tapered needles pierce the roving, fibers of the roving has a tendency to collect between adjacent tapered needles. This results in the need to often remove the collected fibers from between the adjacent tapered needles and lowers the maintenance efficiency of the roving cutting device.
- the fiber bundle feed stopping device stops feeding a drafting device with a fiber bundle and is provided with an untwisting mechanism including a fiber bundle guide and teeth.
- the fiber bundle guide is located at an upstream side of a back roller of the drafting device in a feed direction of the fiber bundle to guide the fiber bundle to the back roller.
- the teeth are arranged next to one another in a direction intersecting the feed direction of the fiber bundle. The teeth pierce the fiber bundle to an intermediate part of the fiber bundle without extending out of the fiber bundle in a state in which the fiber bundle guide regulates where the fiber bundle is positioned.
- the fiber bundle feed stopping device 30 stops feeding a drafting device 10 with a roving S1, which serves as a fiber bundle.
- the drafting device 10 is of a three-roller configuration and includes front rollers 11, aprons 13 that run around middle rollers 12, and back rollers 14.
- the front rollers 11 include a front bottom roller 11 a and a front top roller 11 b.
- the middle rollers 12 include a middle bottom roller 12a and a middle top roller 12b.
- a bottom apron 13a runs around the middle bottom roller 12a, and a top apron 13b runs around the middle top roller 12b.
- the back rollers 14 include a back bottom roller 14a and a back top roller 14b.
- the front bottom roller 11 a is supported by a roller stand 15.
- the middle bottom roller 12a is supported on the roller stand 15 by a middle bottom roller support 16 and a bearing (not shown).
- the back bottom roller 14a is supported on the roller stand 15 by a back bottom roller support 17 and a bearing (not shown).
- the middle bottom roller support 16 and the back bottom roller support 17 are each fixed to the roller stand 15 in a manner allowing for adjustment of the positions of the middle bottom roller support 16 and the back bottom roller support 17 relative to the roller stand 15 in the front-rear direction of the frame (lateral direction in Fig. 1 ).
- the front top roller 11 b, the middle top roller 12b, and the back top roller 14b are respectively supported by top roller supports (not shown) on the weighting arm 18.
- a support bar 21 extends behind and parallel to the back bottom roller 14a.
- a trumpet 22 is fixed to the support bar 21 to guide the roving S1.
- the roving S1 is fed from a roving winding, which is suspended from a creel (not shown), through the trumpet 22 and to the back rollers 14.
- Afiber bundle feed stopping device 30 is arranged at the rear of the trumpet 22 (back rollers 14).
- the fiber bundle feed stopping device 30 includes an untwisting mechanism 31 located at the upstream side of the back rollers 14 in the feed direction of the roving S1 to untwist the roving S1 that is fed to the drafting device 10.
- the untwisting mechanism 31 includes a fiber bundle guide 32 at the upstream side of the back rollers 14 in the feed direction of the roving S1.
- the fiber bundle guide 32 guides the roving S1 to the back rollers 14.
- the fiber bundle guide 32 is generally bow-shaped as a whole in a side view.
- the fiber bundle guide 32 includes a curved portion 32a that is curved like an arc and bulged toward the outer side.
- the curved portion 32a and the trumpet 22 (back rollers 14) are directed toward opposite directions.
- the fiber bundle guide 32 includes a recessed portion 32b and a flanged portion 32c.
- the recessed portion 32b is continuous with one end (lower end in Fig.
- the fiber bundle guide 32 also includes an extending portion 32d that is continuous with the end (upper end in Fig. 2 ) of the curved portion 32a at the opposite side of the recessed portion 32b.
- the recessed portion 32b is supported by a support (not shown) on the weighting arm 18.
- the roving S1 contacts the outer circumferential surface of the curved portion 32a near the recessed portion 32b and the edge of the flanged portion 32c near the recessed portion 32b. Accordingly, the fiber bundle guide 32 includes two contact portions that contact the roving S1. The two contact portions, namely, the curved portion 32a and the flanged portion 32c, are spaced apart from each other in the feed direction of the roving S1. Tension is applied to the roving S1 to urge the roving S1 toward the fiber bundle guide 32 and abut against the two locations, namely, the curved portion 32a and the flanged portion 32c. In this manner, the fiber bundle guide 32 regulates the position of the roving S1.
- the untwisting mechanism 31 includes an untwisting member 33 provided with rows of teeth 33a. Each row of teeth 33a extends in a direction orthogonal to the feed direction of the roving S1.
- the untwisting member 33 includes a main body 33c.
- the main body 33c includes the teeth 33a and a flat surface (base surface 33b) from which the teeth 33a project.
- the main body 33c also includes a rotation shaft 33d. Rotation of the rotation shaft 33d pivots the untwisting member 33 about the rotation axis of the rotation shaft 33d.
- a plurality of (four in the present embodiment) teeth rows are arranged next to one another in the feed direction of the roving S1 on the base surface 33b.
- the teeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to the teeth 33a in the teeth row that is adjacent in the feed direction. Accordingly, in a plan view, the teeth 33a are in a zigzagged arrangement on the base surface 33b.
- the projecting length H1 of the teeth 33a from the base surface 33b is 1.0 mm.
- the projecting length H1 is the length of a straight line connecting the base surface 33b and the distal end of a tooth 33a over the minimum distance.
- the roving S1 of the present embodiment shown in Fig. 2 has a thickness of 2.0 mm.
- the untwisting member 33 is pivotal between a fiber bundle release position, which is shown by the broken lines, and a fiber bundle pierce position, which is shown by the solid lines.
- the untwisting mechanism 31 includes a switching device 35 (refer to Fig. 1 ) used to switch the untwisting member 33 between the fiber bundle release position and the fiber bundle pierce position.
- a controller (not shown) controls the switching device 35 based on a detection signal from a yarn breakage sensor (not shown).
- the configuration of the switching device 35 is not particularly limited.
- the switching device 35 need only be configured to switch the untwisting member 33 between the fiber bundle release position and the fiber bundle pierce position under the control of the controller based on the detection signal of the yarn breakage sensor.
- the teeth 33a When the untwisting member 33 is pivoted to the fiber bundle pierce position, the teeth 33a pierce the roving S1.
- the teeth 33a pierce the roving S1 to an intermediate part of the roving S1 but do not extend out of the roving S1.
- the gap H3 between the distal ends of the teeth 33a and the fiber bundle guide 32 is 1.0 mm.
- the projecting length H1 of the teeth 33a from the base surface 33b and the positions of the fiber bundle guide 32 and the untwisting member 33 are set in advance so that the gap H3 is 1.0 mm between the distal ends of the teeth 33a and the fiber bundle guide 32.
- Each tooth 33a includes a ridgeline 331a extending along the upstream side in the feed direction of the roving S1 when pierced into the roving S1.
- the angle ⁇ 1 is 90 degrees between the ridgeline 331a and the base surface 33b at the upstream side in the feed direction of the roving S1.
- a state in which there are no broken yarns includes a state in which spinning is performed when the roving S1 is fed via the fiber bundle guide 32 to the drafting device 10 and a state before spinning starts in which the roving S1 is not yet fed to the drafting device 10.
- the controller does not determine whether or not a yarn has broken since the yarn breakage sensor does not yet detect for a yarn breakage, and the switching device 35 does not pivot the untwisting member 33 to the fiber bundle pierce position.
- the roving S1 is guided from the roving winding, which is suspended from the creel (not shown), to the fiber bundle guide 32 and the trumpet 22 and fed to the back rollers 14.
- the roving S1 fed to the back rollers 14 is drafted into fleece between the back rollers 14 and the aprons 13 and between the aprons 13 and the front rollers 11. Yarn is formed from the fleece.
- the yarn is guided to a snail wire (not shown) and a traveler (not shown) and wound around a bobbin (not shown).
- the yarn-broken spindle is located from the detection signal of each wire breakage sensor, and the controller drives the switching device 35 of the untwisting mechanism 31 corresponding to the yarn-broken spindle.
- the switching device 35 pivots the untwisting member 33 from the fiber bundle release position to the fiber bundle pierce position, and the teeth 33a pierce the portion of the roving S1 located between the curved portion 32a and the flanged portion 32c in the feed direction of the roving S1.
- the tension applied to the portion of the roving S1 between the curved portion 32a and the flanged portion 32c allows the teeth 33a to easily pierce this portion.
- the fiber bundle guide 32 regulates the position of the roving S1.
- the teeth 33a remain in a state piercing the roving S1 to the intermediate part and do not extend out of the roving S1. This keeps the roving S1 on the teeth 33a. Further, as the drafting device 10 continues to operate and the roving S1 passes through the teeth 33a, the teeth 33a comb and untwist the roving S1.
- the teeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to the teeth 33a in the teeth row that is adjacent in the feed direction of the roving S1.
- This facilitates the separation of fibers S2 in the roving S1 with the teeth 33a and efficiently untwists the roving S1.
- the teeth 33a weaken the bonding of the fibers S2 and decrease the strength of the roving S1.
- the roving S1 pulled by the drafting device 10 is cut between the back rollers 14 and the untwisting mechanism 31. This stops feeding the roving S1 to the drafting device 10 of the spindle where a yarn was broken.
- the angle ⁇ 1 between the ridgeline 331a of each tooth 33a and the base surface 33b at the upstream side in the feed direction of the roving S1 need only be 90 degrees or less.
- the angle ⁇ 1 may be smaller than 90 degrees.
- the angle ⁇ 1 between the ridgeline 331a of each tooth 33a and the base surface 33b at the upstream side in the feed direction of the roving S1 may be greater than 90 degrees.
- the teeth 33a in each teeth row do not have to be shifted by one-half of a teeth pitch relative to the teeth 33a in the teeth row that is adjacent in the feed direction of the roving S1.
- the teeth 33a of each teeth row may be arranged without being shifted from the teeth 33a in other teeth rows.
- the teeth 33a only need to be arranged next to one another in a direction intersecting the feed direction of the roving S1 and do not have to be arranged in a direction orthogonal to the feed direction of the roving S1.
- the projecting length H1 of the teeth 33a from the base surface 33b and the positions of the fiber bundle guide 32 and the untwisting member 33 may be changed in accordance with the thickness H2 of the roving S1.
- the teeth 33a need only pierce the roving S1 without extending out of the roving S1 when the untwisting member 33 is arranged at the fiber bundle pierce position.
- the untwisting member 33 pivots between the fiber bundle release position and the fiber bundle pierce position.
- the untwisting member 33 may be moved straight between the fiber bundle release position and the fiber bundle pierce position.
- the fiber bundle is not limited to the roving S1 and may be a sliver.
- the fiber bundle feed stopping device 30 may be used in a ring spinning frame that spins yarns from a sliver with a drafting device, which drafts a fiber bundle at a draft ratio that is much larger than the typical three-roller drafting device.
- the spinning frame is not limited to a ring spinning frame and may be, for example, a faced yarn spinning machine or a friction spinning machine.
- the spinning frame may be a roving frame.
- a fiber bundle feed stopping device for a spinning frame.
- the fiber bundle feed stopping device stops feeding a drafting device with a fiber bundle and is provided with an untwisting mechanism including a fiber bundle guide and teeth.
- the fiber bundle guide is located at an upstream side of a back roller of the drafting device in a feed direction of the fiber bundle to guide the fiber bundle to the back roller.
- the teeth are arranged next to one another in a direction intersecting the feed direction of the fiber bundle. The teeth pierce the fiber bundle to an intermediate part of the fiber bundle without extending out of the fiber bundle in a state in which the fiber bundle guide regulates where the fiber bundle is positioned.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
- The present invention relates to a fiber bundle feed stopping device for a spinning frame that stops feeding a drafting device with a fiber bundle.
- A spinning frame spins yarn from a roving or a sliver. In the spinning frame, spinning is simultaneously performed by a plurality of spindles. During spinning, when a yarn breaks, spinning is stopped at the spindle where the yarn was broken (hereafter referred to as "the yarn-broken spindle") but continued at the other spindles. One type of a spinning frame continues to feed a drafting device that corresponds to the yarn-broken spindle with a fiber bundle that is drawn in and collected when discharged from the drafting device. There is another type of spinning frame that includes a stopping device to stop feeding the drafting device that corresponds to the yarn-broken spindle with a fiber bundle. As one type of such a stopping device, Japanese Laid-Patent Publication No.
48-4727 - In the roving cutting device of Japanese Laid-Open Patent Publication No.
48-4727 - In the roving cutting device of Japanese Laid-Open Patent Publication No.
48-4727 - It is an object of the present invention to provide a fiber bundle feed stopping device for a spinning frame that allows for easy cutting of a fiber bundle and improves the maintenance efficiency by resisting breakage and reducing the collected fibers.
- One aspect of the present invention is a fiber bundle feed stopping device for a spinning frame. The fiber bundle feed stopping device stops feeding a drafting device with a fiber bundle and is provided with an untwisting mechanism including a fiber bundle guide and teeth. The fiber bundle guide is located at an upstream side of a back roller of the drafting device in a feed direction of the fiber bundle to guide the fiber bundle to the back roller. The teeth are arranged next to one another in a direction intersecting the feed direction of the fiber bundle. The teeth pierce the fiber bundle to an intermediate part of the fiber bundle without extending out of the fiber bundle in a state in which the fiber bundle guide regulates where the fiber bundle is positioned.
- Other aspects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
- The invention, together with objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which:
-
Fig. 1 is a schematic side view showing a drafting device in one embodiment; -
Fig. 2 is an enlarged schematic side view of an untwisting mechanism; -
Fig. 3A is a schematic side view of an untwisting member; -
Fig. 3B is a partial plan view of the untwisting member; -
Fig. 4A is a schematic side view showing the teeth of the untwisting member piercing a roving; -
Fig. 4B is a partial enlarged view ofFig. 4A ; and -
Fig. 5 is a schematic plan view showing a roving that is being untwisted. - One embodiment of a fiber bundle
feed stopping device 30 for a spinning frame will now be described with reference toFigs. 1 to 5 . The fiber bundlefeed stopping device 30 stops feeding adrafting device 10 with a roving S1, which serves as a fiber bundle. - Referring to
Fig. 1 , thedrafting device 10 is of a three-roller configuration and includesfront rollers 11, aprons 13 that run aroundmiddle rollers 12, andback rollers 14. Thefront rollers 11 include a front bottom roller 11 a and afront top roller 11 b. Themiddle rollers 12 include amiddle bottom roller 12a and amiddle top roller 12b. Abottom apron 13a runs around themiddle bottom roller 12a, and atop apron 13b runs around the middletop roller 12b. Theback rollers 14 include aback bottom roller 14a and aback top roller 14b. - The front bottom roller 11 a is supported by a
roller stand 15. Themiddle bottom roller 12a is supported on theroller stand 15 by a middlebottom roller support 16 and a bearing (not shown). Theback bottom roller 14a is supported on theroller stand 15 by a backbottom roller support 17 and a bearing (not shown). The middlebottom roller support 16 and the backbottom roller support 17 are each fixed to theroller stand 15 in a manner allowing for adjustment of the positions of the middlebottom roller support 16 and the backbottom roller support 17 relative to theroller stand 15 in the front-rear direction of the frame (lateral direction inFig. 1 ). - A
support shaft 19, which is supported by theroller stand 15, supports aweighting arm 18 with abracket 20. The fronttop roller 11 b, the middletop roller 12b, and theback top roller 14b are respectively supported by top roller supports (not shown) on theweighting arm 18. - A support bar 21 extends behind and parallel to the
back bottom roller 14a. A trumpet 22 is fixed to the support bar 21 to guide the roving S1. The roving S1 is fed from a roving winding, which is suspended from a creel (not shown), through the trumpet 22 and to theback rollers 14. - Afiber bundle
feed stopping device 30 is arranged at the rear of the trumpet 22 (back rollers 14). The fiber bundlefeed stopping device 30 includes anuntwisting mechanism 31 located at the upstream side of theback rollers 14 in the feed direction of the roving S1 to untwist the roving S1 that is fed to thedrafting device 10. Theuntwisting mechanism 31 includes afiber bundle guide 32 at the upstream side of theback rollers 14 in the feed direction of the roving S1. Thefiber bundle guide 32 guides the roving S1 to theback rollers 14. - Referring to
Fig. 2 , thefiber bundle guide 32 is generally bow-shaped as a whole in a side view. Thefiber bundle guide 32 includes acurved portion 32a that is curved like an arc and bulged toward the outer side. Thecurved portion 32a and the trumpet 22 (back rollers 14) are directed toward opposite directions. Further, thefiber bundle guide 32 includes a recessedportion 32b and aflanged portion 32c. The recessedportion 32b is continuous with one end (lower end inFig. 2 ) of thecurved portion 32a and recessed inwardly from a line extending along the outer circumferential surface of thecurved portion 32a, and theflanged portion 32c is continuous with the end of the recessedportion 32b at the opposite side of thecurved portion 32a and projects toward the trumpet 22. Thus, the recessedportion 32b is located between thecurved portion 32a and theflanged portion 32c. Thefiber bundle guide 32 also includes an extendingportion 32d that is continuous with the end (upper end inFig. 2 ) of thecurved portion 32a at the opposite side of the recessedportion 32b. The recessedportion 32b is supported by a support (not shown) on theweighting arm 18. - The roving S1 contacts the outer circumferential surface of the
curved portion 32a near the recessedportion 32b and the edge of theflanged portion 32c near the recessedportion 32b. Accordingly, thefiber bundle guide 32 includes two contact portions that contact the roving S1. The two contact portions, namely, thecurved portion 32a and theflanged portion 32c, are spaced apart from each other in the feed direction of the roving S1. Tension is applied to the roving S1 to urge the roving S1 toward thefiber bundle guide 32 and abut against the two locations, namely, thecurved portion 32a and theflanged portion 32c. In this manner, thefiber bundle guide 32 regulates the position of the roving S1. - As shown in
Figs. 3Aand 3B , theuntwisting mechanism 31 includes an untwistingmember 33 provided with rows ofteeth 33a. Each row ofteeth 33a extends in a direction orthogonal to the feed direction of the roving S1. The untwistingmember 33 includes amain body 33c. Themain body 33c includes theteeth 33a and a flat surface (base surface 33b) from which theteeth 33a project. Themain body 33c also includes arotation shaft 33d. Rotation of therotation shaft 33d pivots the untwistingmember 33 about the rotation axis of therotation shaft 33d. - A plurality of (four in the present embodiment) teeth rows are arranged next to one another in the feed direction of the roving S1 on the
base surface 33b. Theteeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to theteeth 33a in the teeth row that is adjacent in the feed direction. Accordingly, in a plan view, theteeth 33a are in a zigzagged arrangement on thebase surface 33b. - The projecting length H1 of the
teeth 33a from thebase surface 33b is 1.0 mm. The projecting length H1 is the length of a straight line connecting thebase surface 33b and the distal end of atooth 33a over the minimum distance. The roving S1 of the present embodiment shown inFig. 2 has a thickness of 2.0 mm. - Referring to
Figs. 4A and 4B , the untwistingmember 33 is pivotal between a fiber bundle release position, which is shown by the broken lines, and a fiber bundle pierce position, which is shown by the solid lines. At the fiber bundle pierce position, theteeth 33a pierce the portion of the roving S1 located between thecurved portion 32a and theflanged portion 32c in the feed direction of the roving S1. Theuntwisting mechanism 31 includes a switching device 35 (refer toFig. 1 ) used to switch the untwistingmember 33 between the fiber bundle release position and the fiber bundle pierce position. A controller (not shown) controls theswitching device 35 based on a detection signal from a yarn breakage sensor (not shown). The configuration of theswitching device 35 is not particularly limited. The switchingdevice 35 need only be configured to switch the untwistingmember 33 between the fiber bundle release position and the fiber bundle pierce position under the control of the controller based on the detection signal of the yarn breakage sensor. - When the untwisting
member 33 is pivoted to the fiber bundle pierce position, theteeth 33a pierce the roving S1. Theteeth 33a pierce the roving S1 to an intermediate part of the roving S1 but do not extend out of the roving S1. In the present embodiment, the gap H3 between the distal ends of theteeth 33a and thefiber bundle guide 32 is 1.0 mm. In correspondence with the thickness H2 of the roving S1, the projecting length H1 of theteeth 33a from thebase surface 33b and the positions of thefiber bundle guide 32 and the untwistingmember 33 are set in advance so that the gap H3 is 1.0 mm between the distal ends of theteeth 33a and thefiber bundle guide 32. - Each
tooth 33a includes a ridgeline 331a extending along the upstream side in the feed direction of the roving S1 when pierced into the roving S1. In the present embodiment, the angle θ1 is 90 degrees between the ridgeline 331a and thebase surface 33b at the upstream side in the feed direction of the roving S1. - The operation of the present embodiment will now be described.
- When there are no broken yarns, the untwisting
member 33 is held at the fiber bundle release position. A state in which there are no broken yarns includes a state in which spinning is performed when the roving S1 is fed via the fiber bundle guide 32 to thedrafting device 10 and a state before spinning starts in which the roving S1 is not yet fed to thedrafting device 10. In a state before spinning starts, the controller does not determine whether or not a yarn has broken since the yarn breakage sensor does not yet detect for a yarn breakage, and theswitching device 35 does not pivot the untwistingmember 33 to the fiber bundle pierce position. - When the spinning frame starts to operate, the roving S1 is guided from the roving winding, which is suspended from the creel (not shown), to the
fiber bundle guide 32 and the trumpet 22 and fed to theback rollers 14. The roving S1 fed to theback rollers 14 is drafted into fleece between theback rollers 14 and theaprons 13 and between theaprons 13 and thefront rollers 11. Yarn is formed from the fleece. The yarn is guided to a snail wire (not shown) and a traveler (not shown) and wound around a bobbin (not shown). - When a yarn breakage occurs, the yarn-broken spindle is located from the detection signal of each wire breakage sensor, and the controller drives the
switching device 35 of theuntwisting mechanism 31 corresponding to the yarn-broken spindle. The switchingdevice 35 pivots the untwistingmember 33 from the fiber bundle release position to the fiber bundle pierce position, and theteeth 33a pierce the portion of the roving S1 located between thecurved portion 32a and theflanged portion 32c in the feed direction of the roving S1. The tension applied to the portion of the roving S1 between thecurved portion 32a and theflanged portion 32c allows theteeth 33a to easily pierce this portion. - The
fiber bundle guide 32 regulates the position of the roving S1. Thus, theteeth 33a remain in a state piercing the roving S1 to the intermediate part and do not extend out of the roving S1. This keeps the roving S1 on theteeth 33a. Further, as thedrafting device 10 continues to operate and the roving S1 passes through theteeth 33a, theteeth 33a comb and untwist the roving S1. - As shown in
Fig. 5 , theteeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to theteeth 33a in the teeth row that is adjacent in the feed direction of the roving S1. This facilitates the separation of fibers S2 in the roving S1 with theteeth 33a and efficiently untwists the roving S1. Further, theteeth 33a weaken the bonding of the fibers S2 and decrease the strength of the roving S1. Thus, the roving S1 pulled by the draftingdevice 10 is cut between theback rollers 14 and theuntwisting mechanism 31. This stops feeding the roving S1 to thedrafting device 10 of the spindle where a yarn was broken. - The above embodiment has the advantages described below.
- (1) The fiber bundle
feed stopping device 30 includes theuntwisting mechanism 31. Theuntwisting mechanism 31 includes thefiber bundle guide 32, which is located at the upstream side of theback rollers 14 of thedrafting device 10 and guides the roving S1 to theback rollers 14, and theteeth 33a, which are arranged in a direction orthogonal to the feed direction of the roving S1. Theteeth 33a pierce the roving S1, the position of which is regulated by thefiber bundle guide 32, to an intermediate part of the roving S1 and do not extend out of the roving S1. This keeps the roving S1 on theteeth 33a, which pierce the roving S1 to the intermediate part without extending out of the roving S1. Further, as thedrafting device 10 continues to operate and the roving S1 passes through theteeth 33a, the roving S1 is combed and untwisted by theteeth 33a. This weakens the bonding of the fibers S2 in the roving S1 and decreases the strength of the roving S1. Thus, the roving S1 pulled by the draftingdevice 10 is easily cut between theback rollers 14 and theuntwisting mechanism 31. This stops feeding the roving S1 to thedrafting device 10 of the spindle where a yarn was broken. Further, theteeth 33a piercing the roving S1 do not extend out of the roving S1. This decreases the moving resistance produced when the roving S1 moves between theteeth 33a as compared with the moving resistance produced when the teeth extend out of the roving S1. Further, since theteeth 33a do not extend out of the roving S1, less fibers S collect betweenadjacent teeth 33a. Accordingly, the roving S1 is easily cut and the maintenance efficiency is improved since theteeth 33a resist breakage and collected fibers are reduced. - (2) The
fiber bundle guide 32 includes two contact portions that contact the roving S1, namely, thecurved portion 32a and theflanged portion 32c. This structure allows tension to easily be applied to the portion of the roving S1 between thecurved portion 32a and theflanged portion 32c and facilitates the piercing of the roving S1 by theteeth 33a where the tension is applied. Thus, theteeth 33a pierce the roving S1 more easily than when theteeth 33a pierce a portion of the roving S1 where tension is not applied. As a result, the combing of the roving S1 with theteeth 33a is facilitated, and the roving S1 is efficiently untwisted. - (3) The rows of the
teeth 33a are arranged next to one another in the feed direction of the roving S1. Thus, when thedrafting device 10 is driven and the roving S1 passes through theteeth 33a, the teeth rows further facilitate the combing of the roving S1. This further efficiently untwists the roving S1. - (4) The
teeth 33a in each teeth row is shifted by one-half of a teeth pitch relative to theteeth 33a in the teeth row that is adjacent in the feed direction of the roving S1. Thus, when thedrafting device 10 is driven and the roving S1 passes through theteeth 33a, the teeth rows facilitate the separation of the fibers S2. This further efficiently untwists the roving S1. - (5) The upstream side of each
tooth 33a in the feed direction of the roving S1 when piercing the roving S1 includes the ridgeline 331 a, and the angle θ1 is 90 degrees between the ridgeline 331 a and thebase surface 33b at the upstream side in the feed direction of the roving S1. Thus, the ridgeline 331 a of eachtooth 33a obstructs the movement of the roving S1 more easily than when the angle θ1 is greater than 90 degrees between the ridgeline 331 a and thebase surface 33b at the upstream side in the feed direction of the roving S1. This further facilitates combing of the roving S1 with theteeth 33a. Thus, the roving S1 can be untwisted further efficiently. - The above embodiment may be modified as described below.
- In the above embodiment, the angle θ1 between the ridgeline 331a of each
tooth 33a and thebase surface 33b at the upstream side in the feed direction of the roving S1 need only be 90 degrees or less. For example, the angle θ1 may be smaller than 90 degrees. - In the above embodiment, the angle θ1 between the ridgeline 331a of each
tooth 33a and thebase surface 33b at the upstream side in the feed direction of the roving S1 may be greater than 90 degrees. - In the above embodiment, the
teeth 33a in each teeth row do not have to be shifted by one-half of a teeth pitch relative to theteeth 33a in the teeth row that is adjacent in the feed direction of the roving S1. Theteeth 33a of each teeth row may be arranged without being shifted from theteeth 33a in other teeth rows. - In the above embodiment, there may be two or three teeth rows arranged next to one another in the feed direction of the roving S1. Alternatively, there may be five or more teeth rows arranged next to one another in the feed direction of the roving S1.
- In the above embodiment, there may be only one teeth row.
- In the above embodiment, the
teeth 33a only need to be arranged next to one another in a direction intersecting the feed direction of the roving S1 and do not have to be arranged in a direction orthogonal to the feed direction of the roving S1. - In the above embodiment, the projecting length H1 of the
teeth 33a from thebase surface 33b and the positions of thefiber bundle guide 32 and the untwistingmember 33 may be changed in accordance with the thickness H2 of the roving S1. Theteeth 33a need only pierce the roving S1 without extending out of the roving S1 when the untwistingmember 33 is arranged at the fiber bundle pierce position. - In the above embodiment, the untwisting
member 33 pivots between the fiber bundle release position and the fiber bundle pierce position. For example, the untwistingmember 33 may be moved straight between the fiber bundle release position and the fiber bundle pierce position. - In the above embodiment, the fiber bundle is not limited to the roving S1 and may be a sliver. For example, the fiber bundle
feed stopping device 30 may be used in a ring spinning frame that spins yarns from a sliver with a drafting device, which drafts a fiber bundle at a draft ratio that is much larger than the typical three-roller drafting device. - In the above embodiment, the spinning frame is not limited to a ring spinning frame and may be, for example, a fascinated yarn spinning machine or a friction spinning machine.
- In the above embodiment, the spinning frame may be a roving frame.
- Therefore, the present examples and embodiments are to be considered as illustrative and not restrictive and the invention is not to be limited to the details given herein, but may be modified within the scope and equivalence of the appended claims.
- A fiber bundle feed stopping device for a spinning frame. The fiber bundle feed stopping device stops feeding a drafting device with a fiber bundle and is provided with an untwisting mechanism including a fiber bundle guide and teeth. The fiber bundle guide is located at an upstream side of a back roller of the drafting device in a feed direction of the fiber bundle to guide the fiber bundle to the back roller. The teeth are arranged next to one another in a direction intersecting the feed direction of the fiber bundle. The teeth pierce the fiber bundle to an intermediate part of the fiber bundle without extending out of the fiber bundle in a state in which the fiber bundle guide regulates where the fiber bundle is positioned.
Claims (6)
- A fiber bundle feed stopping device (30) for a spinning frame, wherein the fiber bundle feed stopping device (30) stops feeding a drafting device (10) with a fiber bundle (S1), the fiber bundle feed stopping device (30) being characterized by:an untwisting mechanism (31) includinga fiber bundle guide (32) located at an upstream side of a back roller (14) of the drafting device (10) in a feed direction of the fiber bundle (S1) to guide the fiber bundle (S1) to the back roller (14), andteeth (33a) arranged next to one another in a direction intersecting the feed direction of the fiber bundle (S1),wherein the teeth (33a) pierce the fiber bundle (S1) to an intermediate part of the fiber bundle (S1) without extending out of the fiber bundle (S1) in a state in which the fiber bundle guide (32) regulates where the fiber bundle (S1) is positioned.
- The fiber bundle feed stopping device (30) according to claim 1, being characterized in that:the fiber bundle guide (32) includes two contact portions (32a, 32c) that contact the fiber bundle (S1), whereinthe two contact portions (32a, 32c) are arranged spaced apart from each other in the feed direction of the fiber bundle (S1), andthe teeth (33a) pierce the fiber bundle (S1) at a location between the two contact portions (32a, 32c).
- The fiber bundle feed stopping device (30) according to claim 1 or 2, being characterized in that the fiber bundle guide (32) includes a recessed portion (32b) between the two contact portions (32a, 32c).
- The fiber bundle feed stopping device (30) according to any one of claims 1 to 3, being characterized in that the teeth (33a) are arranged in a plurality of teeth rows laid out next to each other in the feed direction of the fiber bundle (S1).
- The fiber bundle feed stopping device (30) according to claim 4, being characterized in that the teeth (33a) in each teeth row is shifted by one-half of a teeth pitch relative to the teeth (33a) in the teeth row that is adjacent in the feed direction of the fiber bundle (S1).
- The fiber bundle feed stopping device (30) according to any one of claims 1 to 5, being characterized in that:the untwisting mechanism (31) includes a main body (33c), and the main body (33c) includes a flat surface (33b) from which the teeth (33a) project;the teeth (33a) each include a ridgeline (331 a) extending along an upstream side in the feed direction of the fiber bundle (S1) when pierced into the fiber bundle (S1); andan angle (θ1) between the ridgeline (331 a) and the flat surface (33b) at an upstream side in the feed direction is 90 degrees or less.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015136912A JP6332175B2 (en) | 2015-07-08 | 2015-07-08 | Spindle fiber bundle supply stop device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3115489A1 true EP3115489A1 (en) | 2017-01-11 |
EP3115489B1 EP3115489B1 (en) | 2020-12-23 |
Family
ID=56137230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16175183.9A Active EP3115489B1 (en) | 2015-07-08 | 2016-06-20 | Fiber bundle feed stopping device for spinning frame |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3115489B1 (en) |
JP (1) | JP6332175B2 (en) |
CN (1) | CN106337223B (en) |
ES (1) | ES2854423T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110344144A (en) * | 2019-08-13 | 2019-10-18 | 上海兰宝传感科技股份有限公司 | A kind of band tooth lock cover of rove stopping supply device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7151039B2 (en) * | 2019-06-18 | 2022-10-12 | 株式会社豊田自動織機 | Spinning frame |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1103329A (en) * | 1913-12-04 | 1914-07-14 | Edward J Vales | Roving-stop for spinning-frames. |
US1305540A (en) * | 1919-06-03 | Roving-holder | ||
GB476170A (en) * | 1936-05-28 | 1937-11-29 | Fairbairn Lawson Combe Barbour | Improvements in rove stop mechanism for spinning, twisting and like machines used inthe preparation of fibrous substances |
US2734335A (en) * | 1956-02-14 | Strand interrupting and feeding apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS564727A (en) * | 1979-06-20 | 1981-01-19 | Toray Industries | Crude yarn and production thereof |
JPH06228832A (en) * | 1993-02-02 | 1994-08-16 | Howa Mach Ltd | Apparatus for stopping roving feed of spinning frame |
EP2520697B1 (en) * | 2011-05-06 | 2014-04-09 | Vantex Technologies GmbH | Device for stopping a rove supply in a spinning apparatus |
JP5979121B2 (en) * | 2013-11-18 | 2016-08-24 | 株式会社豊田自動織機 | Spindle fiber bundle supply stop device |
-
2015
- 2015-07-08 JP JP2015136912A patent/JP6332175B2/en not_active Expired - Fee Related
-
2016
- 2016-06-20 EP EP16175183.9A patent/EP3115489B1/en active Active
- 2016-06-20 ES ES16175183T patent/ES2854423T3/en active Active
- 2016-07-05 CN CN201610524681.0A patent/CN106337223B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1305540A (en) * | 1919-06-03 | Roving-holder | ||
US2734335A (en) * | 1956-02-14 | Strand interrupting and feeding apparatus | ||
US1103329A (en) * | 1913-12-04 | 1914-07-14 | Edward J Vales | Roving-stop for spinning-frames. |
GB476170A (en) * | 1936-05-28 | 1937-11-29 | Fairbairn Lawson Combe Barbour | Improvements in rove stop mechanism for spinning, twisting and like machines used inthe preparation of fibrous substances |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110344144A (en) * | 2019-08-13 | 2019-10-18 | 上海兰宝传感科技股份有限公司 | A kind of band tooth lock cover of rove stopping supply device |
Also Published As
Publication number | Publication date |
---|---|
JP6332175B2 (en) | 2018-05-30 |
ES2854423T3 (en) | 2021-09-21 |
CN106337223A (en) | 2017-01-18 |
EP3115489B1 (en) | 2020-12-23 |
JP2017020123A (en) | 2017-01-26 |
CN106337223B (en) | 2018-12-07 |
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