EP2141105B1 - Splice head, splicing device and splicing method - Google Patents
Splice head, splicing device and splicing method Download PDFInfo
- Publication number
- EP2141105B1 EP2141105B1 EP08738730.4A EP08738730A EP2141105B1 EP 2141105 B1 EP2141105 B1 EP 2141105B1 EP 08738730 A EP08738730 A EP 08738730A EP 2141105 B1 EP2141105 B1 EP 2141105B1
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- EP
- European Patent Office
- Prior art keywords
- yarn
- yarns
- untwisting
- nozzle hole
- accommodating space
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
- B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
- B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
- B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
- B65H69/04—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by knotting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
- B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
- B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
- B65H69/063—Preparation of the yarn ends
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Gas Burners (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
- The present invention relates to a splicing head used in a splicing device that pieces a plurality of yarns into each other, a splicing device including the splicing head, and a splicing method.
- A conventional splicing head disclosed in Japanese Unexamined Patent Publication
JP-A 2006-52485 - When a compressed fluid is injected from the first nozzle hole, the yarns are untwisted. When a compressed fluid is injected from the second nozzle hole, the yarns that have been extended along the flow of the compressed fluid are intertwined into each other, and thus, the two yarns are completely pieced into each other.
- In the above-described conventional splicing head, the compressed fluids injected from the respective nozzle holes proceed toward the central axis of the yarn-accommodating space. In this case, the amount of untwisted yarn accommodated in the yarn-accommodating space is small. When the amount of untwisted yarn is small, the intertwining of a plurality of yarns may be insufficient even when the plurality of yarns collide against each other.
- For example, in the case where two-ply yarns are to be pieced into each other, the amount untwisted in the above-described conventional splicing head is small because each of the two-ply yarns is twisted, and thus, sufficient piecing cannot be performed. Accordingly, there is a problem in that the strength of such a pieced portion is lowered. In particular, in the case of two-ply yarns obtained by intertwining single yarns obtained by spinning short fibers, such as cotton yarns, the intertwining of such two-ply yarns is loose, and thus, there is a problem in that the strength of such a pieced portion is further lowered. A splicing device including the above-described splicing head and a splicing method also suffer these problems in a similar manner.
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US 4 788 814 A shows and describes a textile winder which has manually actuatable yarn air splicers mounted on the winder closely adjacent the path of travel of the yarn from its source to the yarn package being wound. A yarn end severing means is mounted adjacent each yarn air splicer for severing the ends of the yarn to be spliced so as to obtain substantially coextensive yarn ends for facilitating splicing and obtaining more effective splicing. - It is an object of the invention to provide a splicing head, a splicing device, and a splicing method that can improve the strength of a pieced portion.
- This and other objects are solved by a splicing head having the features as set forth in
claim 1. Preferred embodiments of the splicing head are stated in the sub-claims 2 and 3. - The invention is directed to a splicing head used in a splicing device that pieces a plurality of overlapped yarns into each other by injecting a compressed fluid toward the plurality of yarns under the state that front end portions of the plurality of yarns overlap each other in a same direction, comprising:
- a yarn-accommodating space that can accommodate a plurality of overlapped yarns and that extends along a predetermined central axis;
- an untwisting-nozzle hole that brings the yarn-accommodating space in communication with an outside space and that extends in a torsional direction, which is torsional about the central axis; and
- a piecing-nozzle hole that brings the yarn-accommodating space in communication with an outside space and that extends in an intersecting direction, which intersects the central axis.
- Furthermore, in the invention, it is preferable that the untwisting-nozzle hole extends closer to one side in one direction of the central axis, toward the central axis in a direction perpendicular to the central axis, and is inclined with respect to the central axis.
- Furthermore, in the invention, it is preferable that two untwisting-nozzle holes are formed, and
a first untwisting direction in which a first untwisting-nozzle hole extends toward the yarn-accommodating space and a second untwisting direction in which a second untwisting-nozzle hole extends toward the yarn-accommodating space are opposite each other about the central axis. - The objects are also met by a splicing device having the features defined in claim 4.
- The splicing device comprises:
- the splicing head mentioned above;
- a first injecting portion that injects a compressed fluid via the untwisting-nozzle hole into the yarn-accommodating space;
- a second injecting portion that injects a compressed fluid via the piecing-nozzle hole into the yarn-accommodating space; and
- a control portion that can individually control timings at which compressed fluids are injected from the first injecting portion and the second injecting portion.
- Furthermore, the objects are also met by a splicing method in accordance with claim 5. A preferred embodiment of the splicing methods is stated in sub-claim 6.
- The splicing method for piecing a plurality of yarns into each other using a splicing head including a yarn-accommodating space that can accommodate a plurality of overlapped yarns and that extends along a predetermined central axis, an untwisting-nozzle hole that brings the yarn-accommodating space in communication with an outside space and that extends in a torsional direction, which is torsional about the central axis, and an intertwining-nozzle hole that brings the yarn-accommodating space in communication with an outside space and that extends in an intersecting direction, which intersects the central axis, comprising:
- a yarn-accommodating step of accommodating a plurality of two-ply yarns that overlap each other in a same direction, in the yarn-accommodating space of the splicing head;
- an untwisting step of untwisting each of the two-ply yarns by injecting a compressed fluid from the untwisting-nozzle hole into the yarn-accommodating space; and
- a piecing step of loosening and intertwining the untwisted two-ply yarns by injecting a compressed fluid from the intertwining-nozzle hole into the yarn-accommodating space.
- Furthermore, in the invention, it is preferable that whether or not the untwisting step is necessary is selectively switched according to at least one of a type of yarn-twisting and a number of a plurality of yarns that are to be pieced into each other.
- Furthermore, in the invention, it is preferable that, in the untwisting step, a direction for injecting a compressed fluid is switched so that the compressed fluid rotates in an opposite direction to a direction in which two-ply yarns are twisted.
- Other and further objects, features, and advantages of the invention will be more explicit from the following detailed description taken with reference to the drawings wherein:
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Fig. 1 is an enlarged perspective view showing asplicing head 20 according to an embodiment of the invention; -
Fig. 2 is a front view showing thesplicing head 20; -
Fig. 3 is a plan view showing thesplicing head 20; -
Fig. 4 is a right side view of thesplicing head 20; -
Fig. 5 is a left side view of thesplicing head 20; -
Figs. 6A and 6B show flows of a compressed fluid; -
Fig. 7 is a block diagram showing the functional configuration of asplicing device 30; -
Fig. 8 is a flowchart showing a piecing operation performed by acontrol portion 64; -
Figs. 9A to 9C are views illustrating the piecing operation; and -
Fig. 10 is a plan view showing a splicinghead 20A according to another embodiment of the invention. - Hereinafter, preferable embodiments of the invention will be described in detail with reference to the drawings. Here, in this specification, the term "type of yarn-twisting" refers to types, such as single yarn, two-ply yarn, or three-ply yarn obtained by intertwining three single yarns.
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Fig. 1 is an enlarged perspective view showing asplicing head 20 according to an embodiment of the invention.Fig. 2 is a front view showing thesplicing head 20.Fig. 3 is a plan view showing thesplicing head 20.Fig. 4 is a right side view of thesplicing head 20.Fig. 5 is a left side view of thesplicing head 20. - The
splicing head 20 is a nozzle hole formation member that is provided in asplicing device 30 and that has nozzle holes through which compressed air, which is a compressed fluid, passes. Thesplicing device 30 is an apparatus that pieces and joins a plurality of knitting yarns accommodated in a yarn-accommodatingspace 31 of thesplicing head 20 by injecting a compressed fluid into the yarn-accommodatingspace 31. In this embodiment, thesplicing device 30 pieces two two-ply yarns into each other. - The
splicing head 20 is formed in the shape of a column that extends in a predetermined axial direction Z, and cross-sections perpendicular to the axial direction Z have substantially the same shape. Thesplicing head 20 has a yarn-accommodatingspace 31, an untwisting-nozzle hole 32, a piecing-nozzle hole 33 which is intertwining-nozzle hole, an entrance space-formingportion 24, and a communicatingpassage 35. - The yarn-accommodating
space 31 is formed in the shape of a tube that surrounds a central axis L1 extending in a predetermined direction and that is open on both sides of the central axis L1 in the axial direction Z. The yarn-accommodatingspace 31 is formed so as to be capable of loosely accommodating two two-ply yarns extending along the central axis L1 and overlapping each other. Furthermore, the central axis L1 is set at a position that passes through the center of the yarn-accommodatingspace 31 in a cross-section perpendicular to the axial direction Z. The yarn-accommodatingspace 31 extends along the central axis L1. - The untwisting-
nozzle hole 32 is formed in the shape of a tube that is open on both sides, and brings the yarn-accommodatingspace 31 in communication with an outside space 40a. The untwisting-nozzle hole 32 is a hole for untwisting each of a plurality of two-ply yarns that are to be pieced into each other. The piecing-nozzle hole 33 is formed in the shape of a tube that is open on both sides, and brings the yarn-accommodatingspace 31 in communication with anoutside space 40b. The piecing-nozzle hole 33 is a hole for loosening and intertwining a plurality of two-ply yarns that are to be pieced into each other. - The entrance space-forming
portion 24 is formed so that a cross-section thereof perpendicular to the axial direction Z is in a V-shape, and forms anentrance space 34 in the shape of a triangular prism that becomes wider away from the central axis L1. Theentrance space 34 is formed so that a cross-section thereof perpendicular to the axial direction Z is in the shape of a funnel, and is formed throughout the entire length of the entrance space-formingportion 24 in the axial direction Z. Both a wider-side opening 26 and a narrower-side opening 27 of theentrance space 34 extend throughout the entire length of the entrance space-formingportion 24 in the axial direction Z. The wider-side opening 26 of theentrance space 34 is open to anoutside space 40c. - The communicating
passage 35 brings the narrower-side opening 27 of theentrance space 34 in communication with the yarn-accommodatingspace 31. The communicatingpassage 35 is formed throughout the entire length of thesplicing head 20 in the axial direction Z. The communicatingpassage 35 includes a first communicatingpassage 36 and a second communicatingpassage 37. One end of the first communicatingpassage 36 is linked to the narrower-side opening 27 of theentrance space 34, and the other end is linked to the second communicatingpassage 37. One end of the second communicatingpassage 37 is linked to the yarn-accommodatingspace 31, and the other end is linked to the first communicatingpassage 36. In a plane perpendicular to the axial direction Z, the communicatingpassage 35 has the first communicatingpassage 36 and the second communicatingpassage 37 that extend in different directions, and is bent at the boundary between the first communicatingpassage 36 and the second communicatingpassage 37. - As shown in
Fig. 2 , the untwisting-nozzle hole 32 extends closer to one side (hereinafter, referred to as a "first side") Z1 in the axial direction, toward the central axis L1 in a direction perpendicular to the axial direction Z, and is inclined with respect to the central axis L1. Here, the first side Z1 in the axial direction is one of directions along the central axis L1. In this embodiment, the first side Z1 in the axial direction is a direction in which yarns that are to be pieced into each other and that are accommodated in the yarn-accommodatingspace 31 proceed from the base end side to the front end portion side of the yarns through the yarn-accommodatingspace 31 along the central axis L1. Furthermore, the piecing-nozzle hole 33 extends along a plane perpendicular to the central axis L1. -
Injection openings nozzle hole 32 and the piecing-nozzle hole 33 opening to the yarn-accommodatingspace 31 are formed in the shape of elongated openings that extend in the axial direction Z. The injection opening 33a of the piecing-nozzle hole 33 is positioned closer to the first side Z1 in the axial direction than the injection opening 32a of the untwisting-nozzle hole 32. The injection opening 33a of the piecing-nozzle hole 33 is disposed at the center of the yarn-accommodatingspace 31 in the axial direction Z. Accordingly, the injection opening 32a of the untwisting-nozzle hole 32 is disposed closer to the other side (hereinafter, referred to as a "second side") Z2 in the axial direction than the center of the yarn-accommodatingspace 31 in the axial direction Z. - As shown in
Fig. 3 , the yarn-accommodatingspace 31 is formed so that a cross-section thereof perpendicular to the central axis L1 is substantially in the shape of a semicircle. More specifically, the yarn-accommodatingspace 31 is formed substantially in the shape of a column defined by anarc face 41 that is in the shape of an arc and that extends along the central axis, and a joiningface 42 that joins bothend sides arc face 41. The joiningface 42 is formed in the shape of a flat face that extends in the axial direction Z. The central axis L1 is set at the center of the yarn-accommodatingspace 31. For example, the central axis L1 passes through the center of an inscribed circle that is inscribed in the inner circumferential faces 41 and 42 facing the yarn-accommodatingspace 31. - The injection opening 32a of the untwisting-
nozzle hole 32 is formed at a region of the joiningface 42 closer to one end portion (hereinafter, referred to as a "first end portion") 41a in the circumferential direction of thearc face 41. Furthermore, the untwisting-nozzle hole 32 extends in a direction from the joiningface 42 toward a region of thearc face 41 closer to thefirst end portion 41a in the circumferential direction. In this embodiment, the untwisting-nozzle hole 32 extends in a torsional direction A that is torsional about the central axis L1. - The injection opening 33a of the piecing-
nozzle hole 33 is formed at acentral region 41d in the circumferential direction of thearc face 41. Furthermore, the piecing-nozzle hole 33 extends in a direction from thearc face 41 toward a region of acenter 41c in the width direction of the joiningface 42. In this embodiment, the piecing-nozzle hole 33 extends in a perpendicular direction B that is perpendicular to the central axis L1. Furthermore, the piecing-nozzle hole 33 extends in a direction perpendicular to the joiningface 42. -
Figs. 6A and 6B are views illustrating the flow of compressed fluids.Fig. 6A shows a flow F1 of a compressed fluid injected from the untwisting-nozzle hole 32.Fig. 6B shows a flow F2 of a compressed fluid injected from the piecing-nozzle hole 33. - As shown in
Fig. 6A , air as a compressed fluid supplied from the untwisting-nozzle hole 32 to the yarn-accommodatingspace 31 flows along the arc face 41 from thefirst end portion 41a in the circumferential direction of thearc face 41 to the other end portion (hereinafter, referred to as a "second end portion") 41b in the circumferential direction. Accordingly, a rotating flow F1 that rotates about the central axis L1 is formed in the yarn-accommodatingspace 31. Accordingly, in the case where a plurality of yarns that are to be pieced into each other are present near the central axis L1, each of the plurality of yarns rotates together with the rotating flow F1 about the central axis L1. Each of the plurality of yarns is untwisted through rotation in the opposite direction to the twisting direction. - Furthermore, in this embodiment, as shown in
Fig. 2 , the untwisting-nozzle hole 32 is inclined with respect to the central axis L1, and thus, a compressed fluid proceeds along the first side Z1 in the axial direction while spirally rotating about the central axis L1. Accordingly, the rotating flow F1 can be formed over a wide range in the axial direction Z, and yarns arranged in the yarn-accommodatingspace 31 can be untwisted over a wide range in the axial direction Z. - As shown in
Fig. 6B , a compressed fluid supplied from the piecing-nozzle hole 33 to the yarn-accommodating space passes through thearc face 41 and then the central axis L1, and collides against the joiningface 42. When the compressed fluid perpendicularly collides against the joiningface 42, a straight flow F2 toward the central axis L1 is formed. Accordingly, in the case where a plurality of yarns that are to be pieced into each other are present near the central axis L1, the plurality of yarns are displaced, loosened, and intertwined into each other by a strong impact received from the compressed fluid through the collision with the straight flow F2. -
Fig. 7 is a block diagram showing the functional configuration of thesplicing device 30. Thesplicing device 30 includes afirst injecting portion 60, asecond injecting portion 61, a yarn-guidingportion 62, asplicing assistance portion 63, and acontrol portion 64. Thefirst injecting portion 60 supplies a compressed fluid via the untwisting-nozzle hole 32 to the yarn-accommodatingspace 31 of thesplicing head 20. Thesecond injecting portion 61 supplies a compressed fluid via the intertwining-nozzle hole 33 to the yarn-accommodatingspace 31 of thesplicing head 20. - The yarn-guiding
portion 62 guides a plurality of yarns that are to be pieced into each other and accommodates the yarns in the yarn-accommodatingspace 31. Thesplicing assistance portion 63 assists the splicing operation so that a piecing operation is smoothly performed. More specifically, thesplicing assistance portion 63 clamps a plurality of yarns that are to be pieced into each other, or cuts an unnecessary portion, for example. Thecontrol portion 64 controls theportions 60 to 63 by giving control commands thereto. Each of the portions can be realized using a conventional technique. In this embodiment, thecontrol portion 64 is configured so as to be capable of individually controlling the timings at which compressed fluids are injected from the first injectingportion 60 and thesecond injecting portion 61. -
Fig. 8 is a flowchart showing the piecing operation performed by thecontrol portion 64.Figs. 9A to 9C are views illustrating the piecing operation. The operation is performed in the order fromFig. 9A to Fig. 9C . Hereinafter, the case will be described in which two-ply yarns control portion 64, the procedure proceeds to Step a1 where the piecing operation starts. - In Step a1, the
control portion 64 controls the yarn-guidingportion 62 so that two yarns that are to be pieced into each other are guided to pass through theentrance space 34 and the communicatingpassage 35 and accommodated in the yarn-accommodatingspace 31. At that time, thesplicing assistance portion 63 assists the operation so that the yarns that are to be pieced into each other extend in the axial direction Z and front end portions of the yarns overlap each other on the first side Z1 in the axial direction. After the yarn-accommodating step of aligning the plurality of two-ply yarns Fig. 9A and accommodating the yarns in the yarn-accommodatingspace 31, the procedure proceeds to Step a2. - In Step a2, the
control portion 64 controls the first injectingportion 60 so that a compressed fluid is injected from the untwisting-nozzle hole 32 into the yarn-accommodatingspace 31. Accordingly, in the yarn-accommodatingspace 31, the rotating flow F1 that rotates about the central axis L1 is formed, and the plurality of two-ply yarns ply yarns Fig. 9B , S-twisted two-ply yarns ply yarns portion 60 is stopped, and the procedure proceeds to Step a3. - In Step a3, the
control portion 64 controls thesecond injecting portion 61 so that a compressed fluid is injected from the piecing-nozzle hole 33 into the yarn-accommodatingspace 31. Accordingly, in the yarn-accommodatingspace 31, the compressed fluid collides against the plurality of two-ply yarns ply yarns Fig. 9C , the two-ply yarns ply yarns second injecting portion 61 is stopped, and the procedure proceeds to Step a4. - In Step a4, the
control portion 64 controls thesplicing assistance portion 63 so that clamping of the plurality of two-ply yarns is cancelled or an unnecessary yarn portion is cut, for example. Then, thecontrol portion 64 discharges a yarn obtained by piecing out of the yarn-accommodatingspace 31, and ends the piecing operation. In this embodiment, the unnecessary yarn portion is cut after Step a3, but Step a3 may be performed after the unnecessary yarn portion is cut. - As described above, in this embodiment, each of the plurality of two-
ply yarns nozzle hole 32. Next, an impact is imparted to the plurality of untwisted two-ply yarns nozzle hole 33. When each of the plurality of two-ply yarns ply yarns ply yarns - Furthermore, in this embodiment, the compressed fluid injected from the untwisting-
nozzle hole 32 proceeds along the first side Z1 in the axial direction while spirally rotating about the central axis L1. Accordingly, two-ply yarns can be untwisted over a wide range in the axial direction Z, and thus, the subsequent step of loosening and intertwining the two-ply yarns can be effectively performed. Furthermore, when the spirally rotating flow F1 that proceeds along the first side Z1 in the axial direction is formed, the two-ply yarns - Furthermore, in this embodiment, as shown in
Fig. 2 , the injection opening 32a of the untwisting-nozzle hole 32 is disposed closer to the second side Z2 in the axial direction than the injection opening 33a of the piecing-nozzle hole 33. Thus, portions of the two-ply yarns that have been untwisted by the first injectingportion 60 can be loosened by thesecond injecting portion 61 to facilitate intertwining. Accordingly, the degree of the two-ply yarns intertwined can be further increased. Furthermore, in this embodiment, the injection opening 32a of the untwisting-nozzle hole 32 is formed in the shape of an elongated opening that extends in the axial direction Z. Thus, a rotating flow that spirally rotates can be easily formed. Furthermore, the injection opening 33a of the piecing-nozzle hole 33 is formed in the shape of an elongated opening that extends in the axial direction Z. Thus, yarns can be loosened and intertwined into each other over a wide range. Furthermore, a compressed fluid injected from the piecing-nozzle hole 33 is injected in a direction perpendicular to the central axis L1 and proceeds perpendicularly to the joiningface 42. Accordingly, the compressed fluid for piecing can be prevented from moving in the axial direction Z, and the impact imparted to yarns for piecing can be increased. - Furthermore, it is preferable that the
control portion 64 selectively switches whether or not the untwisting step is necessary according to at least one of the type of yarn material, the type of yarn-twisting, and the total amount of fibers contained in a plurality of yarns that are to be pieced into each other. For example, in the case where yarns can be sufficiently loosened and intertwined into each other even without performing the untwisting step, such as the case in which piecing is performed using a single yarn, piecing is performed using a yarn having long fibers, or two or more two-ply yarns are to be pieced into each other, the piecing step may be performed after the yarn-accommodating step without performing the untwisting step. - For example, setup information indicating whether or not to perform the untwisting step is stored in advance in a storage portion of the
control portion 64. Furthermore, information indicating the type of yarn-twisting, the total amount of fibers contained in a plurality of yarns that are to be pieced into each other, and the like is given as input values into thecontrol portion 64. Accordingly, thecontrol portion 64 determines whether or not the untwisting step is necessary. In the case where it is determined that the untwisting step is necessary, the untwisting step is performed. In the case where it is determined that the untwisting step is not necessary, the untwisting step is not performed. Accordingly, the piecing time can be shortened because the untwisting step is not performed. - The
splicing device 30 of this embodiment is used in a weft knitting machine. In this case, thesplicing device 30 is used, for example, for piecing a knitting yarn having a color different from that of a knitting yarn currently being used for knitting into the knitting yarn currently being used for knitting. Furthermore, thesplicing device 30 is used also for piecing a new knitting yarn into a broken knitting yarn. In this case, the weft knitting machine is provided with a control portion. When the control portion determines that it is time for piecing, the operation shown inFig. 8 is started. A weft knitting machine is disclosed, for example, in Japanese Unexamined Patent PublicationJP-A 2006-118059 - Furthermore, this embodiment is preferably used in the case where one two-
ply yarn 70 and one two-ply yarn 71 are to be pieced into each other. Moreover, this embodiment is preferably used in the case where piecing is performed using a two-ply yarn made of a cotton yarn. However, there is no limitation to a two-ply yarn made of a cotton yarn, and piecing can be performed also with other types of yarn material or other types of yarn-intertwining. Furthermore, in this embodiment, the case was described in which the S-twisted two-ply yarns Figs. 1 to 3 . -
Fig. 10 is a plan view showing asplicing head 20A according to another embodiment (hereinafter, referred to as a "second embodiment") of the invention. Thesplicing head 20A of the second embodiment has a similar configuration to that of thesplicing head 20. of the first embodiment, and thus, the same portions in the configurations are denoted by the same reference numerals and a description thereof will not be repeated. Thesplicing head 20A of the second embodiment is different from thesplicing head 20 of the first embodiment in that two untwisting-nozzle holes - A rotating flow formed by a compressed fluid injected from the first untwisting-
nozzle hole 32A into the yarn-accommodatingspace 31 and a rotating flow formed by a compressed fluid injected from the second untwisting-nozzle hole 32B into the accommodating space are set so as to be oriented in opposite directions. That is to say, a first untwisting direction in which the first untwisting-nozzle hole 32A extends toward the yarn-accommodatingspace 31 and a second untwisting direction in which the second untwisting-nozzle hole 32B extends toward the yarn-accommodatingspace 31 are the opposite each other about the central axis. - The
splicing device 30 including thesplicing head 20A of the second embodiment is configured so that compressed fluids injected from the two untwisting-nozzle holes control portion 64. In this case, thecontrol portion 64 switches the direction for injecting a compressed fluid so that the compressed fluid can rotate in the opposite direction to a direction in which two-ply yarns are twisted, in the untwisting step shown in Step a2 ofFigs. 9A to 9C . Accordingly, onesplicing device 30 can be used regardless of whether two-ply yarns are S-twisted or Z-twisted, and thus, the versatility can be improved. - The foregoing embodiments are merely examples of the invention, and the configuration can be changed within the scope of the invention. For example, there is no limitation on the specific shape of the splicing head as long as the untwisting-
nozzle hole 32 and the piecing-nozzle hole 33 are formed, and the external shape can be changed as appropriate. Also, the specific configuration of thesplicing device 30 can be changed as appropriate. Furthermore, although the yarn-accommodatingspace 31 was in the shape of a semicircle, the shape is not limited to a semicircle, and may be other shapes, such as a circle. Furthermore, for example, although compressed air was used as a compressed fluid in the foregoing embodiments, the type of fluid is not limited to air, and thus, a gas inert to yarns that are to be pieced into each other, such as nitrogen gas, may be used instead of air. Also, water under pressure may be used as a compressed fluid. - The invention may be embodied in other specific forms. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the scope of the claims are therefore intended to be embraced therein.
- According to the invention, when a compressed fluid is injected from the untwisting-nozzle hole into the yarn-accommodating space, a rotating flow that rotates about the central axis is formed in the yarn-accommodating space. Accordingly, a plurality of yarns that are to be pieced into each other and that are present near the central axis are angularly displaced together with the rotating flow about the central axis. The plurality of yarns are untwisted through rotation in the opposite direction of the twisting direction.
- Furthermore, when a compressed fluid is injected from the intertwining-nozzle hole into the yarn-accommodating space, a compressed fluid collides against the plurality of yarns that are to be pieced into each other. In this case, the plurality of yarns that are to be pieced into each other are displaced, loosened, and intertwined into each other by a strong impact received from the compressed fluid.
- When each of a plurality of yarns that are to be pieced into each other is untwisted by injecting a compressed fluid from the untwisting-nozzle hole, and then an impact is imparted to the plurality of untwisted yarns by injecting a compressed fluid from the intertwining-nozzle hole, the plurality of yarns are complexly intertwined into each other, and fibers projecting from the plurality of yarns are complexly intertwined into each other. Accordingly, the strength of a pieced portion in a yarn obtained by piecing can be improved.
- According to the invention, when a compressed fluid is injected from the untwisting-nozzle hole into the yarn-accommodating space, the compressed fluid proceeds to one side in the axial direction while spirally rotating about the central axis. A plurality of yarns that are to be pieced into each other are arranged on one side of the central axis. In this case, yarns that are to be pieced into each other and that are arranged in a spirally rotating flow are angularly displaced about the central axis in a state where the front end portions of the yarns are extended to one side in the axial direction, and thus, the yarns can be effectively untwisted.
- According to the invention, when each of a plurality of yarns that are to be pieced into each other is S-twisted, each of the plurality of yarns that are to be pieced into each other is untwisted by injecting a compressed fluid from the first untwisting-nozzle hole. In this case, when each of a plurality of yarns that are to be pieced into each other is Z-twisted, each of the plurality of yarns that are to be pieced into each other is untwisted by injecting a compressed fluid from the second untwisting-nozzle hole. In this manner, yarns can be untwisted by selectively injecting a compressed fluid from two untwisting-nozzle holes, regardless of whether the yarns are S-twisted or Z-twisted, and thus, the versatility can be improved.
- According to the invention, the first injecting portion is used to inject a compressed fluid from the untwisting-nozzle hole, thereby untwisting each of a plurality of yarns that are to be pieced into each other. Next, the second injecting portion is used to inject a compressed fluid from the intertwining-nozzle hole, thereby intertwining the plurality of yarns that are to be pieced into each other. As described above, when each of a plurality of yarns is untwisted, and then the plurality of yarns are intertwined into each other, the yarns are complexly intertwined into each other. Accordingly, the strength of a pieced portion in a yarn obtained by piecing can be improved.
- According to the invention, a plurality of two-ply yarns are accommodated in the yarn-accommodating space in the yarn-accommodating step, and each of the plurality of two-ply yarns is untwisted in the untwisting step. Next, the two-ply yarns are intertwined into each other in the piecing step. Accordingly, the yarns are complexly intertwined into each other, and the strength of a pieced portion can be improved.
- According to the invention, whether or not the untwisting step is necessary for untwisting two-ply yarns is selectively switched according to at least one of a type of yarn-twisting and a number of a plurality of yarns that are to be pieced into each other. Accordingly, in the case where the strength of a pieced portion can be secured even without performing the untwisting step, such as a case in which two two-ply yarns are to be pieced into each other or two single yarns are to be pieced into each other, the untwisting step does not have to be performed, and thus, the convenience can be improved.
- According to the invention, when the direction for injecting a compressed fluid is switched so that the compressed fluid rotates in the opposite direction of a direction in which two-ply yarns are twisted, the yarns can be untwisted regardless of whether the two-ply yarns are S-twisted or Z-twisted, and thus, the versatility can be improved.
Claims (6)
- A splicing head (20) used in a splicing device (30) that pieces a plurality of overlapped yarns into each other by injecting a compressed fluid toward the plurality of yarns under the state that front end portions of the plurality of yarns overlap each other in a same direction, comprising:a yarn-accommodating space (31) that can accommodate a plurality of overlapped yarns and that extends along a predetermined central axis (L1);an untwisting-nozzle hole (32) that is formed in a shape of an elongated opening and brings the yarn-accommodating space (31) in communication with an outside space (40a) and that extends in a torsional direction, which is torsional about the central axis (L1); andan intertwining-nozzle hole (33) that is formed in a shape of an elongated opening and brings the yarn-accommodating space (31) in communication with an outside space (40b) and that extends in an intersecting direction, which intersects the central axis (L1),wherein the compressed fluid injected from the untwisting-nozzle hole (32) flows along an inner peripheral face of the yarn-accommodating space (31) so as to generate a rotating flow that rotates in a direction opposite to a twisting direction of the plurality of yarns, thereby each of the plurality of yarns is untwisted.
- The splicing head (20) of claim 1, wherein the untwisting-nozzle hole (32) extends closer to one side in one direction of the central axis (L1), toward the central axis (L1) in a direction perpendicular to the central axis (L1), and is inclined with respect to the central axis (L1).
- The splicing head (20A) of claim 1 or 2, wherein two untwisting-nozzle holes (32A, 32B) are formed, and
a first untwisting direction in which a first untwisting-nozzle hole (32A) extends toward the yarn-accommodating space (31) and a second untwisting direction in which a second untwisting-nozzle hole (32B) extends toward the yarn-accommodating space (31) are opposite each other about the central axis (L1). - A splicing device (30), comprising:the splicing head (20; 20A) of any one of claims 1 to 3;a first injecting portion (60) that injects a compressed fluid via the untwisting-nozzle hole (32) into the yarn-accommodating space (31);a second injecting portion (61) that injects a compressed fluid via the intertwining-nozzle hole (32) into the yarn-accommodating space (31); anda control portion (64) that determines whether or not untwisting is necessary according to at least one of a type of yarn-twisting and a number of a plurality of yarns that are to be pieced into each other, and, when determining that the untwisting is necessary, can individually control timings at which compressed fluids are injected from the first injecting portion (60) and the second injecting portion (61).
- A splicing method for piecing a plurality of yarns into each other using a splicing head (20) including a yarn-accommodating space (31) that can accommodate a plurality of overlapped yarns and that extends along a predetermined central axis (L1), an untwisting-nozzle hole (32) that brings the yarn-accommodating space (31) in communication with an outside space (40a) and that extends in a torsional direction, which is torsional about the central axis (L1), and an intertwining-nozzle hole (33) that brings the yarn-accommodating space (31) in communication with an outside space (40b) and that extends in an intersecting direction, which intersects the central axis (L1), comprising:a yarn-accommodating step of accommodating a plurality of two-ply yarns that overlap each other in a same direction, in the yarn-accommodating space (31) of the splicing head (20);an untwisting step of untwisting each of the two-ply yarns by injecting a compressed fluid from the untwisting-nozzle hole (32) into the yarn-accommodating space (31); anda piecing step of loosening and intertwining the untwisted two-ply yarns by injecting a compressed fluid from the intertwining-nozzle hole (33) into the yarn-accommodating space (31),wherein whether or not the untwisting step is necessary is selectively switched according to at least one of a type of yarn-twisting and a number of a plurality of yarns that are to be pieced into each other.
- The splicing method of claim 5, wherein, in the untwisting step, a direction for injecting a compressed fluid is switched so that the compressed fluid rotates in an opposite direction to a direction in which two-ply yarns are twisted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007075644 | 2007-03-22 | ||
PCT/JP2008/055337 WO2008114873A1 (en) | 2007-03-22 | 2008-03-21 | Splice head, splicing device and splicing method |
Publications (3)
Publication Number | Publication Date |
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EP2141105A1 EP2141105A1 (en) | 2010-01-06 |
EP2141105A4 EP2141105A4 (en) | 2012-02-22 |
EP2141105B1 true EP2141105B1 (en) | 2013-05-15 |
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Application Number | Title | Priority Date | Filing Date |
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EP08738730.4A Active EP2141105B1 (en) | 2007-03-22 | 2008-03-21 | Splice head, splicing device and splicing method |
Country Status (5)
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EP (1) | EP2141105B1 (en) |
JP (1) | JP5192482B2 (en) |
KR (1) | KR101129484B1 (en) |
CN (1) | CN101652304B (en) |
WO (1) | WO2008114873A1 (en) |
Cited By (1)
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---|---|---|---|---|
DE102021108708A1 (en) | 2021-04-08 | 2022-10-13 | Saurer Spinning Solutions Gmbh & Co. Kg | Splicing prism for a thread splicing device of a work station of a textile machine producing cross-wound bobbins |
Families Citing this family (10)
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JP2013245069A (en) * | 2012-05-25 | 2013-12-09 | Murata Machinery Ltd | Yarn splicing device, yarn splicing system, and textile machine |
CN104097992B (en) * | 2014-06-26 | 2016-09-07 | 安徽科蓝智能技术有限公司 | A kind of device and method for cable knotting |
CN105253714A (en) * | 2015-11-10 | 2016-01-20 | 太仓市世博纺织配件有限公司 | Machining method of knotting gun head |
CN105293190A (en) * | 2015-11-10 | 2016-02-03 | 太仓市世博纺织配件有限公司 | Knotting gun head |
DE102018108147A1 (en) | 2018-04-06 | 2019-10-10 | Saurer Spinning Solutions Gmbh & Co. Kg | Thread splicing device for a workstation of a cross-wound textile machine |
JP7026560B2 (en) * | 2018-04-12 | 2022-02-28 | Tmtマシナリー株式会社 | Splicer for synthetic yarn |
JP7202956B2 (en) * | 2018-04-12 | 2023-01-12 | Tmtマシナリー株式会社 | Splicer for synthetic yarn |
KR102067355B1 (en) | 2019-01-02 | 2020-02-11 | 김일열 | Air splicing device |
KR102111656B1 (en) | 2019-12-17 | 2020-05-15 | 김래곤 | Automatic knot device for circular knitting machine |
KR102519259B1 (en) * | 2022-12-19 | 2023-04-10 | 주식회사 유엘케미칼 | Hemp stem epidermal air bridging knot device |
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DE3706728A1 (en) * | 1987-03-02 | 1988-09-15 | Schubert & Salzer Maschinen | METHOD AND DEVICE FOR TENSIONING A SPINNING DEVICE WORKING WITH A PNEUMATIC TWIST ORGAN |
US4788814A (en) * | 1987-08-26 | 1988-12-06 | Fieldcrest Cannon, Inc. | Textile winder equipped with air splicer and attendant method |
JP2590565B2 (en) * | 1989-06-23 | 1997-03-12 | 村田機械株式会社 | Splicing nozzle block |
JPH05338922A (en) * | 1992-06-10 | 1993-12-21 | Murata Mach Ltd | Untwisting nozzle for splicer |
JPH0676256U (en) * | 1993-04-05 | 1994-10-28 | 村田機械株式会社 | Splicer untwisting nozzle |
TW504526B (en) * | 1998-12-25 | 2002-10-01 | Murata Machinery Ltd | Hairiness suppressing device for automatic winder |
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JP2006052485A (en) | 2004-08-10 | 2006-02-23 | Murata Mach Ltd | Splicer nozzle |
JP4366288B2 (en) | 2004-10-19 | 2009-11-18 | 株式会社島精機製作所 | Knitting machine, yarn processing method in knitting machine, yarn processing control device in knitting machine and program thereof |
JP4281713B2 (en) * | 2005-06-07 | 2009-06-17 | 村田機械株式会社 | Splicer device and yarn splicing method |
-
2008
- 2008-03-21 KR KR1020097022042A patent/KR101129484B1/en active IP Right Grant
- 2008-03-21 EP EP08738730.4A patent/EP2141105B1/en active Active
- 2008-03-21 JP JP2009505265A patent/JP5192482B2/en active Active
- 2008-03-21 CN CN2008800094092A patent/CN101652304B/en active Active
- 2008-03-21 WO PCT/JP2008/055337 patent/WO2008114873A1/en active Search and Examination
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021108708A1 (en) | 2021-04-08 | 2022-10-13 | Saurer Spinning Solutions Gmbh & Co. Kg | Splicing prism for a thread splicing device of a work station of a textile machine producing cross-wound bobbins |
Also Published As
Publication number | Publication date |
---|---|
EP2141105A1 (en) | 2010-01-06 |
CN101652304A (en) | 2010-02-17 |
WO2008114873A1 (en) | 2008-09-25 |
EP2141105A4 (en) | 2012-02-22 |
KR20090123010A (en) | 2009-12-01 |
JPWO2008114873A1 (en) | 2010-07-08 |
JP5192482B2 (en) | 2013-05-08 |
CN101652304B (en) | 2012-09-26 |
KR101129484B1 (en) | 2012-03-28 |
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