CN111807156A - Guide drum and yarn winding device - Google Patents
Guide drum and yarn winding device Download PDFInfo
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- CN111807156A CN111807156A CN202010222880.2A CN202010222880A CN111807156A CN 111807156 A CN111807156 A CN 111807156A CN 202010222880 A CN202010222880 A CN 202010222880A CN 111807156 A CN111807156 A CN 111807156A
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- yarn
- tube
- cylindrical
- cylindrical portion
- guide
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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
- B65H57/00—Guides for filamentary materials; Supports therefor
- B65H57/12—Tubes
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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
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
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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
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/40—Applications of tension indicators
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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
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
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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
- B65H71/00—Moistening, sizing, oiling, waxing, colouring or drying filamentary material as additional measures during package formation
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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)
- Quality & Reliability (AREA)
- Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
Abstract
The guide drum (50) assists unwinding of the yarn Y from the yarn Supplying Bobbin (SB). The guide tube (50) is provided with: a first cylindrical portion (51) having a cylindrical shape and extending along a central axis (L); and a 2 nd tube part (52) extending along the central axis (L) and connected with the end part of the 1 st tube part (51) on the upstream side of the yarn (Y) unwound from the yarn Supplying Bobbin (SB) along the yarn running direction of the two end parts along the central axis (L). The cross-sectional shape of the 2 nd cylindrical portion (52) in the direction orthogonal to the central axis (L) includes a portion that is a non-circular shape.
Description
Technical Field
The present invention relates to a guide tube for assisting unwinding of a yarn from a bobbin, and a yarn winding device.
Background
There are automatic winders that unwind a yarn from a yarn supplying bobbin and wind the yarn on a winding bobbin. Here, a balloon is formed around the yarn supplying bobbin by the yarn unwound from the winding bobbin. The balloon is a portion where the yarn unwound from the yarn supplying bobbin flies due to centrifugal force. In order to prevent excessive yarn dancing during yarn unwinding, an automatic winder is provided with a yarn unwinding assisting device for assisting the unwinding of the yarn.
The yarn unwinding assisting device includes: a guide cylinder covering the core tube of the yarn feeding bobbin. The yarn unwinding assisting device prevents the yarn from excessively flying by bringing the guide drum into contact with the balloon. A yarn unwinding assisting device including such a guide drum is described in, for example, japanese patent application laid-open No. 2013-67459.
Here, when the speed of unwinding the yarn from the yarn supplying bobbin becomes high, the speed of the yarn dancing becomes high, and the centrifugal force applied to the yarn becomes large. This increases the expansion of the balloon of the yarn unwound from the yarn supplying bobbin.
Disclosure of Invention
Accordingly, an object of one aspect of the present invention is to provide a guide tube capable of efficiently suppressing expansion of a balloon of a yarn.
One aspect of the present invention is a guide drum for assisting unwinding of a yarn from a bobbin, the guide drum including: a first cylindrical portion 1 having a cylindrical shape and extending along a predetermined reference axis; and a 2 nd tube part extending along the reference axis and connected to an upstream end of the 1 st tube part in a yarn running direction of the yarn unwound from the bobbin, wherein a cross-sectional shape of the 2 nd tube part in a direction orthogonal to the reference axis includes a portion having a non-circular shape.
In this guide tube, the yarn unwound from the bobbin passes through the 2 nd tube part and then passes through the 1 st tube part. That is, the 2 nd tube portion guides the yarn to the 1 st tube portion while suppressing the balloon expansion of the yarn unwound from the bobbin. Further, the 1 st tubular portion suppresses expansion of the balloon by the inner peripheral surface. Here, the 2 nd cylindrical portion includes a portion having a non-circular cross-sectional shape. Therefore, when the yarn flies in a state where the balloon contacts the inner peripheral surface of the 2 nd tube portion, the yarn is vibrated by applying an impact to the flying yarn by the non-circular portion. The vibration switches the intensity of the centrifugal force applied to the yarn, and hinders the formation of the balloon. In this way, the guide tube includes the 2 nd tube portion having the non-annular portion, and thus expansion of the balloon of the yarn can be effectively suppressed.
In the guide cylinder, the 2 nd cylinder part may have a tapered shape gradually expanding from the end part on the side connected to the 1 st cylinder part toward the end part on the opposite side to the end part on the side connected to the 1 st cylinder part. In this case, the guide tube can have a shape in which the 2 nd tube portion is along the tapered surface portion of the yarn wound on the bobbin. Thus, the guide tube can bring the tapered surface portion of the bobbin closer to the 2 nd tube portion, and can further suppress the balloon expansion of the yarn.
The 2 nd cylindrical portion may have a portion with a non-circular cross-sectional shape, and the portion may be provided at an end portion of the 2 nd cylindrical portion opposite to an end portion of the 2 nd cylindrical portion connected to the 1 st cylindrical portion. In this case, the vibration generated in the yarn by the non-annular portion can be efficiently transmitted to the balloon in the portion of the bobbin between the unwinding position of the yarn and the 2 nd drum portion. Thus, the guide tube can more efficiently suppress the expansion of the balloon of the yarn.
In the guide tube, the 2 nd tube portion may include: the portion of the 2 nd cylindrical portion that is not annular is configured to include a curved portion. In this case, the guide tube can suppress the expansion of the balloon of the yarn by giving an impact to the yarn by the portion provided with the bent portion.
In the guide tube, three or more of the above-described bent portions protruding outward may be provided in the 2 nd tube portion. In addition, the non-annular portion of the 2 nd cylindrical portion is formed in a regular polygonal shape by alternately providing the curved portions and linear portions connecting the curved portions. In this case, the guide tube can efficiently give an impact to the yarn, and the expansion of the balloon of the yarn can be further suppressed.
In the guide tube, the 2 nd tube portion may be provided with an outer bent portion which is a bent portion protruding outward, an inner bent portion which is a bent portion protruding inward, and a straight portion, the plurality of outer bent portions may be provided, the same number of inner bent portions as the number of outer bent portions may be provided, and the outer bent portions and the inner bent portions may be alternately provided in the circumferential direction of the 2 nd tube portion and may be connected by the straight portion. In this case, the guide tube can efficiently give an impact to the yarn by the outer curved portions and the inner curved portions which are alternately provided.
In the guide tube, the bent portion provided in the 2 nd tube portion may extend from an end portion of the 2 nd tube portion opposite to the end portion connected to the 1 st tube portion toward the end portion connected to the 1 st tube portion, and an amount of protrusion may gradually decrease as the bent portion goes toward the end portion connected to the 1 st tube portion. In this case, the 2 nd tube portion can smoothly guide the yarn toward the 1 st tube portion.
In the guide tube, an end portion of the 2 nd tube portion on the side connected to the 1 st tube portion may have an annular shape. In this case, the 2 nd tube portion can guide the yarn more smoothly toward the 1 st tube portion.
According to an aspect of the present invention, expansion of the balloon of the yarn can be efficiently suppressed.
Drawings
Fig. 1 is a front view of an automatic winder according to an embodiment.
Fig. 2 is a side view of the take-up unit.
Fig. 3 is a side view of the periphery of the guide cylinder of the yarn unwinding assisting device.
Fig. 4 is a side view of the guiding drum.
Fig. 5 is an end view of the 2 nd cylindrical portion along the line V-V of fig. 4.
Fig. 6 is a perspective view of the guide tube viewed from the 2 nd tube portion side.
Fig. 7 is a schematic view showing a trajectory along which the yarn moves while contacting the lower end portion of the 2 nd tube portion when the guide tube is viewed from the 2 nd tube portion side.
Fig. 8 (a) to 8 (d) are perspective views of the guide tube of the modified example viewed from the 2 nd tube portion side.
Fig. 9 is a side view of a guide tube of a modification.
Fig. 10 is an end view of the 2 nd cylindrical part along the X-X line of fig. 9.
Fig. 11 is a perspective view of the guide tube of fig. 9 viewed from the 2 nd tube portion side.
Fig. 12 (a) to 12 (d) are perspective views of the guide tube of the modified example viewed from the 2 nd tube portion side.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
As shown in fig. 1, the automatic winder 1 includes: a plurality of winding units (yarn winding devices) 3, a machine control device 5, and a doffing device 7 arranged in an array.
The machine control device 5 can communicate with the plurality of winding units 3, respectively. The operator of the automatic winder 1 can comprehensively manage the plurality of winding units 3 by appropriately operating the machine station control device 5. The console control device 5 is provided with a display screen 5a and an input keyboard 5 b. The display 5a can display information and the like related to the setting content and/or the state of the winding unit 3. The operator performs an operation as appropriate using the input keyboard 5b to set the winding unit 3.
The plurality of winding units 3 unwind the yarn Y from each yarn supplying bobbin (bobbin) SB and wind the yarn Y onto the winding bobbin WB while traversing the yarn Y. Thus, the winding unit 3 forms the package P. Yarn Y may also include a core yarn. The core yarn is, for example, a monofilament, a yarn, or the like.
When the package P becomes full (a state in which a predetermined amount of yarn is wound) in each of the plurality of winding units 3, the doffer 7 travels to the position of the winding unit 3, removes the full package from the winding unit 3, and sets the empty winding bobbin WB in the winding unit 3.
Next, the structure of the winding unit 3 will be described with reference to fig. 2. As shown in fig. 2, each of the plurality of winding units 3 includes a unit controller 10, a yarn feeder 12, and a winding device 14.
The unit control unit 10 includes, for example, a cpu (central Processing unit) and a rom (read only memory). The ROM stores programs for controlling the respective configurations of the winding unit 3. The CPU executes a program stored in the ROM. The unit control unit 10 controls each configuration of the winding unit 3 by cooperation between hardware and software. The unit control unit 10 is configured to be able to communicate with the machine control device 5. This enables the operations of the plurality of winding units 3 provided in the automatic winder 1 to be collectively managed by the stage control device 5.
The yarn feeding device 12 is a support mechanism that supports a yarn supplying bobbin SB placed on the carrying tray at a predetermined position. The yarn Y is unwound from the yarn supplying bobbin SB and is drawn upward from the yarn supplying bobbin SB. Thereby, the yarn feeding device 12 feeds the yarn Y. The yarn feeding device 12 is not limited to the tray type, and may be a magazine type, for example.
The winding device 14 includes a cradle 16 and a winding drum 18. The cradle 16 has a pair of rotation support portions (not shown). The cradle 16 rotatably supports the winding bobbin WB (or the package P) by sandwiching the winding bobbin WB with the rotation support portion. The cradle 16 can switch between a state in which the supported package P is in contact with the winding drum 18 and a state in which the package P is separated from the winding drum 18.
The winding drum 18 traverses the yarn Y on the surface of the package P and rotates the package P. The take-up drum 18 is driven to rotate by a drum drive motor (not shown). The package P is driven to rotate by rotationally driving the winding drum 18 in a state where the outer peripheral surface of the package P is brought into contact with the winding drum 18. Further, a spiral traverse groove is formed on the outer peripheral surface of the winding drum 18. The yarn Y unwound from the yarn supplying bobbin SB is wound on the surface of the package P while being traversed by the traverse groove within a constant width. This enables the formation of the package P having a constant winding width.
The plurality of winding units 3 each include, in the yarn running path between the yarn feeding device 12 and the winding device 14, a yarn unwinding assisting device 20, a tension applying device 22, a tension detecting device 24, a yarn splicing device 26, a yarn monitoring device 28, and a waxing device 30 in this order from the yarn feeding device 12 side. In the vicinity of the yarn joining device 26, a 1 st catching guide 32 and a 2 nd catching guide 34 are arranged.
The yarn unwinding assisting device 20 includes a guide tube 50 that can cover the core tube of the yarn supplying bobbin SB. The guide tube 50 is substantially cylindrical and is disposed so as to contact a balloon formed on the upper portion of the yarn layer of the yarn Y on the yarn supplying bobbin SB. The balloon is a portion where the yarn Y unwound from the yarn supplying bobbin SB flies by centrifugal force. By bringing the guide cylinder 50 into contact with the balloon, the yarn Y in the balloon portion is brought into contact to prevent the yarn Y from flying excessively. This allows the yarn Y to be appropriately unwound from the yarn supplying bobbin SB.
The tension applying device 22 applies a predetermined tension to the yarn Y running thereon. In the present embodiment, the tension applying device 22 has a gate structure, and movable comb teeth are arranged for fixed comb teeth. The movable comb teeth are urged to mesh with each other. The tension applying device 22 applies tension to the yarn Y by passing the yarn Y between the comb teeth while bending between the comb teeth in the engaged state. The operation of the tension applying device 22 is controlled by the unit control section 10.
The tension detecting device 24 detects (measures) the tension of the yarn Y running between the yarn feeding device 12 and the winding device 14. The tension detection device 24 outputs a tension measurement signal indicating the measurement value of the tension of the yarn Y to the unit control section 10.
When the yarn Y is disconnected for some reason between the yarn supplying device 12 and the winding device 14, the yarn joining device 26 joins the yarn Y (lower yarn) on the side of the yarn supplying device 12 and the yarn Y (upper yarn) on the side of the winding device 14. In the present embodiment, the yarn joining device 26 is configured as a splicing device that splices yarn ends together by a swirling air flow generated by compressed air.
The yarn monitoring device 28 monitors the state of the yarn Y running on the yarn path, and detects the presence or absence of a yarn defect based on the monitored information. The yarn monitoring device 28 detects, for example, an abnormal thickness of the yarn Y and/or a foreign substance contained in the yarn Y as a yarn defect. The yarn monitoring device 28 also detects yarn breakage, i.e., the presence or absence of the yarn Y in the yarn path. A cutter 29 for cutting the yarn Y is provided near the yarn monitoring device 28. The cutter 29 operates based on the yarn monitoring device 28.
The waxing device 30 is disposed between the winding device 14 and the yarn monitoring device 28. The waxing device 30 waxes the yarn Y that is fed from the yarn monitoring device 28 to the winding device 14.
Next, the structure of the yarn unwinding assisting device 20 will be described in detail. As shown in fig. 3, above the yarn supplying bobbin SB supported in an upright state by the yarn supplying device 12, the yarn unwinding assisting device 20 assists the unwinding of the yarn Y from the yarn supplying bobbin SB. The yarn unwinding assisting device 20 controls the size of a balloon formed by the yarn Y unwound from the yarn supplying bobbin SB, and applies an appropriate tension to the yarn Y.
Specifically, the yarn unwinding assisting device 20 includes a guide tube 50, a fixed tube 54, and an elevating mechanism 56. The fixed cylinder 54 is a substantially cylindrical member having upper and lower ends opened. The fixed drum 54 is fixed to a frame of the winding unit 3 via a bracket 58. A yarn guide 55 is provided at the lower end of the fixed cylinder 54.
The guide cylinder 50 is a substantially cylindrical member having upper and lower ends opened. The guide tube 50 is supported by the elevating mechanism 56 via a bracket 57. A lower portion of the fixed cylinder 54 is fitted into an upper portion of the guide cylinder 50. The guide tube 50 is driven by the elevating mechanism 56 to be elevated and thereby covers the upper portion of the yarn supplying bobbin SB. The center axis of the yarn supplying bobbin SB is aligned with the center axes of the fixed bobbin 54 and the guide bobbin 50.
Further, the yarn unwinding assisting device 20 includes: and a sensor for detecting the height of the tapered surface T of the yarn supplying bobbin SB. The position of the conical surface portion T is lowered as the yarn Y is unwound. The lifting mechanism 56 lowers the guide tube 50 in accordance with the height of the tapered surface portion T detected by the sensor.
The fixed cylinder 54 restricts expansion of the balloon in a fixed state. The guide tube 50 moves following the unwinding of the yarn Y from the yarn supplying bobbin SB, and restricts the expansion of the balloon. In this way, the fixed cylinder 54 and the guide cylinder 50 assist the unwinding of the yarn Y by restricting the expansion of the balloon.
Next, details of the guide cylinder 50 will be described. The guide tube 50 shown in fig. 4 to 6 assists unwinding of the yarn Y from the yarn supplying bobbin SB as described above. The guide tube 50 includes a 1 st tube portion 51 and a 2 nd tube portion 52. The 1 st cylinder 51 has a cylindrical shape extending along a central axis (predetermined reference axis) L. That is, the cross-sectional shape of the 1 st tube part 51 in the direction orthogonal to the central axis L is an annular shape.
The 2 nd cylindrical portion 52 extends along the central axis L. The 2 nd cylindrical portion 52 is coupled to the lower end portion of the 1 st cylindrical portion 51. That is, the 2 nd tube portion 52 is connected to the end portion on the upstream side in the yarn running direction of the yarn Y unwound from the yarn supplying bobbin SB, of both end portions (upper end portion and lower end portion) of the 1 st tube portion 51 along the central axis L.
The 2 nd cylindrical portion 52 has a tapered shape whose diameter is enlarged toward the lower end portion. That is, the 2 nd cylindrical portion 52 has a tapered shape gradually expanding from an end portion (upper end portion) on the side connected to the 1 st cylindrical portion 51 toward an end portion (lower end portion) on the opposite side to the end portion on the side connected to the 1 st cylindrical portion 51.
In addition, the cross-sectional shape of the 2 nd cylindrical portion 52 in the direction orthogonal to the central axis L includes a portion that is a non-annular shape. Here, the sectional shape of the 2 nd cylindrical portion 52 is a non-circular ring shape, which means that the sectional shape of the 2 nd cylindrical portion 52 is not a circular ring shape (a perfect circular ring shape). The circular ring shape includes, for example, a shape in which a notch is provided in a part of the circular ring, such as a C-letter shape. That is, the circular ring shape includes: even if a notch is provided in a part of the ring, the cross-sectional shape of the portion in which the yarn Y flying in the 2 nd tube part 52 abuts is constituted by a shape along a perfect circle.
In the present embodiment, the 2 nd cylindrical portion 52 includes a portion having a rectangular ring-shaped cross section as a portion having a non-circular cross section in a direction perpendicular to the central axis L. In the 2 nd cylindrical portion 52, a portion having a rectangular ring-shaped cross-sectional shape is provided at the lower end portion of the 2 nd cylindrical portion 52. That is, the portion of the 2 nd tube 52 having a rectangular ring-like cross-sectional shape is provided at the end of the 2 nd tube 52 opposite to the end connected to the 1 st tube 51.
Thus, the 2 nd tube portion 52 has four outwardly protruding outside bent portions (bent portions) W1. The 2 nd cylindrical portion 52 has a rectangular ring-shaped cross section and is composed of four outer curved portions W1 and a straight portion WS connecting these portions. In the present embodiment, the inner angles of the outward curved portions W1 at the lower end of the 2 nd tube portion 52 are 90 °. The outer curved portion W1 is provided at the lower end of the 2 nd tube portion 52 and extends from the lower end of the 2 nd tube portion 52 toward the upper end.
The amount of protrusion of the outer curved portion W1 provided in the 2 nd cylindrical portion 52 gradually decreases as it goes toward the end (upper end) connected to the 1 st cylindrical portion 51. The projecting amount here means the amount of deviation from the 1 st cylindrical portion 51 when the 2 nd cylindrical portion 52 is viewed in the axial direction. In other words, when the amount of protrusion is zero, the 1 st tubular portion 51 and the 2 nd tubular portion 52 have the same shape. As shown in fig. 5, the end (upper end) of the 2 nd cylindrical portion 52 on the side connected to the 1 st cylindrical portion 51 is shaped like an annular ring. That is, the cross-sectional shape of the 2 nd cylindrical portion 52 gradually changes from a rectangular ring shape to an annular shape from the lower end portion toward the upper end portion of the 2 nd cylindrical portion 52.
Next, a description will be given of a trajectory of the yarn Y unwound from the yarn supplying bobbin SB and flying along the inner circumferential surface of the 2 nd tube portion 52. Here, a description will be given of a trajectory of the yarn Y moving along the inner peripheral surface of the lower end portion of the 2 nd tube portion 52 with reference to fig. 7. Fig. 7 shows only the yarn Y (cross section of the yarn Y) at the lower end of the 2 nd tube portion 52 and the portion in contact with the lower end of the 2 nd tube portion 52.
As shown in fig. 7, the yarn Y flies by centrifugal force and moves in the circumferential direction along the inner circumferential surface 53 of the 2 nd tube portion 52 in a state of being in contact with the inner circumferential surface 53. The trajectory of the yarn Y is defined as a trajectory K. Four inner surfaces constituting the inner peripheral surface 53 are inner surfaces 53 a. That is, the yarn Y flies in such a manner as to sequentially come into contact with the four inner surfaces 53 a.
As described above, the 2 nd tube portion 52 is provided with the outward curved portion W1. Therefore, when the yarn Y moves from the currently abutting inner surface 53a toward the next inner surface 53a via the outside bend portion W1, the yarn Y temporarily separates from the inner peripheral surface 53 and abuts against the collision position Z of the next inner surface 53 a. When the yarn Y comes into contact with the next collision position Z of the inner peripheral surface 53, the moving direction of the yarn Y is abruptly changed, and an impact is applied to the yarn Y. The yarn Y is vibrated by the impact (a portion where the trajectory K in fig. 7 is a wavy line shape). This vibration suppresses the expansion of the balloon of the yarn Y, and weakens the centrifugal force applied to the yarn Y. In the present embodiment, the impact is applied to the yarn Y four times in total at the collision position Z of the inner surfaces 53a while the yarn Y makes one turn around the inner peripheral surface 53 of the 2 nd tube portion 52.
As described above, after the yarn Y unwound from the yarn supplying bobbin SB passes through the 2 nd tube portion 52, the guide tube 50 passes through the 1 st tube portion 51. That is, the 2 nd tube portion 52 guides the yarn Y to the 1 st tube portion 51 while suppressing expansion of the balloon of the yarn Y unwound from the yarn supplying bobbin SB. Further, the 1 st tubular portion 51 suppresses expansion of the balloon by the inner peripheral surface. Here, the 2 nd cylindrical portion 52 includes a portion having a non-circular cross-sectional shape. That is, in the present embodiment, the 2 nd cylindrical portion 52 includes a portion having a rectangular ring-like cross-sectional shape. Therefore, when the yarn Y is formed to fly in a state where the balloon is in contact with the inner peripheral surface 53 of the 2 nd tube portion 52, the yarn Y is vibrated by applying an impact to the yarn Y flying due to the rectangular ring-shaped portion. The strength of the centrifugal force applied to the yarn Y is switched by this vibration, and the formation of the balloon is inhibited. In this way, the guide tube 50 includes the 2 nd tube portion 52 having a rectangular annular portion, and thus expansion of the balloon of the yarn Y can be effectively suppressed.
The guide tube 50 can suppress the yarn Y from being excessively drawn out by the centrifugal force by suppressing the expansion of the balloon. Thus, the guide tube 50 can suppress loosening of the yarn Y at an undesired portion and the like, and can suppress the yarn Y from being separated from the yarn supplying bobbin SB in a circular shape as it is (so-called slipping). Further, the guide tube 50 can suppress the yarn Y unwound from the yarn supplying bobbin SB from being wound around the core tube of the yarn supplying bobbin SB, and can reduce the tension of the yarn Y when the yarn Y is drawn from the yarn supplying bobbin SB. Thus, the guide tube 50 can suppress yarn breakage of the yarn Y and can increase the unwinding speed of the yarn Y.
The 2 nd cylindrical portion 52 has a tapered shape whose diameter is enlarged toward the lower end portion. In this case, the guide tube 50 can form the 2 nd tube portion 52 into a shape along the tapered surface portion T of the yarn Y wound around the yarn supplying bobbin SB. Thus, the guide tube 50 can bring the tapered surface portion T of the yarn supplying bobbin SB closer to the 2 nd tube portion 52, and can further suppress the balloon expansion of the yarn Y.
The 2 nd cylindrical portion 52 is provided at a lower end portion of the 2 nd cylindrical portion 52 with a portion having a rectangular ring-like cross-sectional shape. In this case, the vibration generated in the yarn Y in the rectangular ring-shaped portion can be efficiently transmitted to the balloon (the balloon of the portion not in contact with the guide tube 50) in the portion between the unwinding position of the yarn Y and the 2 nd tube portion 52 of the yarn supplying bobbin SB. This enables the guide tube 50 to more efficiently suppress the balloon expansion of the yarn Y.
The rectangular ring-shaped portion of the 2 nd cylindrical portion 52 is formed of four outer bent portions W1 and a straight portion WS connecting these portions. In this case, the guide tube 50 can suppress the expansion of the balloon of the yarn Y by giving an impact to the yarn Y at the portion where the outside bent portion W1 is provided. In addition, the 2 nd tube portion 52 is provided with four outer curved portions W1. Therefore, the guide tube 50 can efficiently give an impact to the yarn Y by the four outer bent portions W1, and can further suppress the balloon expansion of the yarn Y.
The amount of the outward bent portion W1 provided in the 2 nd cylindrical portion 52 that protrudes gradually decreases as it goes toward the side coupled to the 1 st cylindrical portion 51. In this case, the 2 nd tube portion 52 can smoothly guide the yarn Y toward the 1 st tube portion having a cylindrical shape. The end of the 2 nd cylindrical portion 52 on the side connected to the 1 st cylindrical portion 51 is formed in an annular shape. In this case, the 2 nd tube part 52 can guide the yarn Y more smoothly toward the 1 st tube part 51.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, the 2 nd cylindrical portion 52 is not limited to having a portion in a rectangular ring shape as shown in fig. 6 as a portion having a non-circular cross-sectional shape. The 2 nd cylindrical portion may have a polygonal ring-shaped portion other than a square shape as long as it is a non-circular ring shape. For example, as in the guide tube 50A shown in fig. 8 (a), the 2 nd tube portion 52A may include: a triangular ring-shaped portion formed by the three outside bent portions W1 and the three linear portions WS is formed. Similarly, for example, as in the guide tube 50B shown in fig. 8 (B), the 2 nd tube portion 52B may include: a pentagonal ring-shaped portion formed by five outside bent portions W1 and five straight portions WS is formed. For example, as in the guide tube 50C shown in fig. 8 (C), the 2 nd tube portion 52C may include: a hexagonal ring-shaped portion formed by six outside bent portions W1 and six linear portions WS is formed. For example, as in the guide tube 50D shown in fig. 8 (D), the 2 nd tube portion 52D may include: an octagonal ring-shaped portion formed by the eight outside bent portions W1 and the eight straight portions WS is formed. In these cases, the guide cylinders 50A to 50D can also provide the same effects as the guide cylinder 50 in the embodiment. Triangular ring shapes, rectangular ring shapes, pentagonal ring shapes, hexagonal ring shapes, and octagonal ring shapes can be referred to as regular polygonal shapes.
For example, instead of providing three or more outer bent portions W1 as described with reference to fig. 6 and 8 (a) to 8 (d), only one or two outer bent portions W1 may be provided. In this case, the guide tube can also provide the outside bend W1 to give an impact to the yarn Y, and the same effect as the guide tube 50 in the embodiment can be obtained.
Further, the 2 nd tube portion 52 may include an inner curved portion protruding inward in addition to the outer curved portion W1. Specifically, as shown in fig. 9 to 11, the guide tube 50E includes a 1 st tube portion 51 and a 2 nd tube portion 52E. The 2 nd tube portion 52E has four outwardly protruding outside bent portions W1 and has four inwardly protruding inside bent portions (bent portions) W2. The outer bent portions W1 and the inner bent portions W2 are alternately provided in the circumferential direction of the 2 nd tube portion 52E, and the outer bent portions W1 and the inner bent portions W2 are respectively joined by the straight portions WS. The inner angle of the outside bent portion W1 is less than 90 °. The inside bend W2 has an interior angle greater than 180 °. The portion of the 2 nd tube portion 52E having a non-circular cross-sectional shape is formed by four outer curved portions W1 and four inner curved portions W2.
In this case, the 2 nd tube portion 52E can also efficiently give an impact to the yarn Y when the yarn Y flies by the outer curved portions W1 and the inner curved portions W2 provided alternately, and can suppress the expansion of the balloon of the yarn Y. In this way, the guide drum 50E can exert the same effect as the guide drum 50 in the embodiment. Further, the guide tube 50E can adjust the magnitude of the impact applied to the yarn Y by changing the magnitude of the inner angle between the outer bend W1 and the inner bend W2.
For example, the 2 nd tube portion 52E is not limited to having four outer bends W1 and four inner bends W2 as shown in fig. 11 as a portion having a non-circular cross-sectional shape. The 2 nd tube portion may also have a plurality of outer bent portions W1 and the same number of inner bent portions W2 as the outer bent portions W1. For example, as in the guide tube 50F shown in fig. 12 (a), the 2 nd tube portion 52F may include a portion having a non-annular shape formed by the three outer curved portions W1 and the three inner curved portions W2. Similarly, for example, like the guide tube 50G shown in fig. 12 (b), the 2 nd tube portion 52G may have a non-annular portion formed by five outer bent portions W1, five inner bent portions W2, and ten straight portions WS (some of the reference numerals in fig. 12 (b)) joined thereto. For example, as in the guide tube 50H shown in fig. 12 (c), the 2 nd tube portion 52H may have a portion that is formed into a non-annular shape by six outer curved portions W1, six inner curved portions W2, and 12 straight portions WS (reference numerals in fig. 12 (c)) that connect these portions. For example, as in the guide tube 50I shown in fig. 12 (d), the 2 nd tube portion 52I may have a non-annular portion formed by eight outer curved portions W1, eight inner curved portions W2, and 16 straight portions WS (reference numerals in fig. 12 (c)) connecting these portions.
For example, as described with reference to fig. 11 and 12 (a) to 12 (d), the 2 nd tube portion may be provided with one or two outer bent portions W1 and inner bent portions W2, in addition to three or more outer bent portions W1 and inner bent portions W2, respectively. The 2 nd tube portion may have the number of outer bent portions W1 different from the number of inner bent portions W2. In this case, the guide tube can also provide the impact to the yarn Y by providing the outer bend W1 and the inner bend W2, and can provide the same effect as the guide tube 50 in the embodiment.
Further, one or more inside bent portions W2 may be provided only in the 2 nd tube portion. In this case, the guide tube can also provide the inner bend W2 to give an impact to the yarn Y, and the same effect as the guide tube 50 in the embodiment can be obtained.
The 2 nd tube portion 52 is not limited to the portion formed with the non-annular cross-sectional shape by the outward curved portion W1. The 2 nd tube portion 52 may be configured to have a portion whose cross-sectional shape is a non-annular shape by a configuration other than the configuration in which the outer bent portion W1 and the inner bent portion W2 are provided. The cross-sectional shape of the 2 nd cylindrical portion may be, for example, an elliptical ring shape. The 2 nd cylindrical portion 52 may not have a tapered shape gradually expanding toward the lower end portion. The portion having the non-circular cross-sectional shape may not be provided at the lower end of the 2 nd cylindrical portion 52. The 2 nd cylindrical portion 52 may be provided with a portion having a non-circular cross-sectional shape at a certain position of the 2 nd cylindrical portion 52.
The outward bent portion W1 provided in the 2 nd cylindrical portion 52 is not limited to the gradually decreasing amount of protrusion as the end portion connected to the 1 st cylindrical portion 51 becomes closer. The amount of protrusion of the outer curved portion W1 provided in the 2 nd cylindrical portion 52 may be constant. The end of the 2 nd cylindrical portion 52 on the side connected to the 1 st cylindrical portion 51 may not have an annular shape.
At least some of the above-described embodiments and various modifications may be arbitrarily combined.
Claims (10)
1. A guide tube for assisting unwinding of a yarn from a bobbin, comprising:
a first cylindrical portion 1 having a cylindrical shape and extending along a predetermined reference axis; and
a 2 nd tube portion extending along the reference axis and connected to an upstream end of the 1 st tube portion in a yarn running direction of the yarn unwound from the bobbin, among both ends of the tube portion along the reference axis,
in the guide cylinder, the guide cylinder is arranged in the guide cylinder,
the 2 nd cylindrical portion has a cross-sectional shape in a direction orthogonal to the reference axis, including a portion that is a non-circular shape.
2. The guide sleeve of claim 1,
the 2 nd cylindrical part is formed in a tapered shape gradually expanding from an end part on a side connected to the 1 st cylindrical part toward an end part on a side opposite to the end part on the side connected to the 1 st cylindrical part.
3. The guide cylinder according to claim 1 or 2,
the 2 nd cylindrical portion has a portion having a non-annular cross-sectional shape provided at an end portion of the 2 nd cylindrical portion opposite to an end portion of the 2 nd cylindrical portion connected to the 1 st cylindrical portion.
4. The guiding barrel according to claim 3,
the 2 nd tube part has: a bent portion protruding toward the outside or the inside,
the non-annular portion in the 2 nd cylindrical portion is configured to include the curved portion.
5. The guiding barrel according to claim 4,
the 2 nd cylindrical portion is provided with three or more curved portions projecting outward.
6. The guiding barrel according to claim 5,
the non-annular portion of the 2 nd cylindrical portion is formed in a regular polygonal shape by alternately providing the curved portion and a linear portion that joins the curved portion.
7. The guiding barrel according to claim 4,
the 2 nd cylindrical portion is provided with an outer curved portion which is the curved portion projecting outward, an inner curved portion which is the curved portion projecting inward, and a straight portion,
a plurality of the outside bent portions are provided,
the inner bent portions are provided in the same number as the outer bent portions,
the outer curved portions and the inner curved portions are alternately provided in a circumferential direction of the 2 nd cylindrical portion and are joined by the straight portions.
8. The guide cylinder according to any one of claims 4 to 7,
the bent portion provided in the 2 nd cylindrical portion extends from an end portion of the 2 nd cylindrical portion opposite to an end portion of the 2 nd cylindrical portion connected to the 1 st cylindrical portion toward an end portion of the 1 st cylindrical portion connected to the first cylindrical portion, and an amount of protrusion gradually decreases as the bent portion goes toward the end portion of the 1 st cylindrical portion connected to the first cylindrical portion.
9. The guide cylinder according to any one of claims 1 to 8,
the shape of the end of the 2 nd cylindrical part on the side connected to the 1 st cylindrical part is an annular shape.
10. A yarn winding device comprising the guide tube according to any one of claims 1 to 9,
the yarn path includes, in order from the yarn feeding side: a yarn unwinding assisting device having the guide drum, a tension applying device, a yarn splicing device, a yarn monitoring device, and a winding device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019074848A JP2020172362A (en) | 2019-04-10 | 2019-04-10 | Guide cylinder |
| JP2019-074848 | 2019-04-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111807156A true CN111807156A (en) | 2020-10-23 |
| CN111807156B CN111807156B (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010222880.2A Active CN111807156B (en) | 2019-04-10 | 2020-03-26 | Guide tube and yarn winding device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020172362A (en) |
| CN (1) | CN111807156B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723018A (en) * | 2021-01-14 | 2021-04-30 | 青岛宏大纺织机械有限责任公司 | Self-cleaning yarn leading device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111807156B (en) | 2023-06-02 |
| JP2020172362A (en) | 2020-10-22 |
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