Yarn processing device

Abstract

The present invention enables the state of a thread to be detected with high precision and the configuration to be simplified in a thread processing device. An oil supply guide (10) for applying an oil agent to a yarn formed by bundling a plurality of filaments spun from a spinning unit has electrical conductivity or semi-electrical conductivity at least in a contact portion with the yarn. The electrostatic quantity detection circuit (51) outputs a signal corresponding to the electrostatic quantity generated in the oil supply guide due to the contact between the wire and the oil supply guide. The control unit (52) outputs a first signal indicating that the state of the wire in the oil supply guide is a predetermined state when the maximum change amount ([delta] E) of the electrostatic quantity indicated by the signal output from the electrostatic quantity detection circuit is equal to or less than a threshold value ([delta] Ea) during the period from the time before the predetermined time to the present time. When the maximum change amount ([delta] E) is greater than the threshold value ([delta] Ea), the control unit outputs a second signal indicating that the state of the wire in the oil supply guide is not the predetermined state.

Description

Technical Field

[0001] This invention relates to a thread processing apparatus. Background Technology

[0002] In the thread breakage detection device of Patent Document 1, a current collector is provided for the traveling thread. The current collector contacts the thread and detects the static electricity generated due to the contact with the traveling thread. Furthermore, in Patent Document 1, thread breakage is detected based on the static electricity detected by the current collector.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 48-98132 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the thread breakage detection device of Patent Document 1, the number of parts increases accordingly because a dedicated current collector is provided for the thread. Furthermore, in Patent Document 1, space for the current collector needs to be secured within the thread processing device equipped with the thread breakage detection device. Therefore, the structure of the thread processing device equipped with the thread breakage detection device in Patent Document 1 may become complex.

[0008] The purpose of this invention is to provide a thread processing device that can detect the state of the thread and has a simplified structure.

[0009] Methods for solving problems

[0010] The thread processing apparatus according to the first embodiment includes: an oil supply guide that contacts a traveling thread, at least the contact portion in contact with the thread being conductive or semi-conductive, and applying an oil to the thread; and an electrostatic quantity detection unit that detects the amount of electrostatic charge generated in the oil supply guide.

[0011] According to this solution, the state of the wire in the oil supply guide can be detected based on the detection result of the amount of static electricity generated in the oil supply guide due to the contact between the traveling wire and the oil supply guide.

[0012] Furthermore, in cases where a separate dedicated contact component is used to generate static electricity through contact with the thread, and the amount of static electricity generated in the contact component is detected, the number of parts increases, and space needs to be secured for the contact component, making the structure of the thread handling device more complex. In contrast, in this solution, in a thread handling device equipped with an oil supply guide, the amount of static electricity generated in the oil supply guide due to contact between the thread and the oil supply guide is detected. Therefore, compared to the case of separately providing the aforementioned dedicated contact component, the structure of the thread handling device can be simplified.

[0013] The yarn processing apparatus according to the second embodiment is configured such that, in the yarn processing apparatus according to the first embodiment, multiple filaments spun from the spinning section are introduced into the oil supply guide, and the oil supply guide applies an oil to the yarn formed by bundling the multiple filaments, wherein the spinning section spins the multiple filaments for forming one yarn.

[0014] According to this solution, for a structure in which multiple filaments spun from the spinning section are guided into an oil supply guide to form a single thread, the state of the multiple filaments guided into the oil supply guide and the thread formed by the multiple filaments can be detected based on the amount of static electricity in the oil supply guide, and thus the state of the thread can be determined.

[0015] The thread processing apparatus according to the third embodiment is configured such that, in the thread processing apparatus according to the first embodiment or the second embodiment, it includes a control unit, which outputs a thread status signal indicating the state of the thread in the oil supply guide based on the amount of static electricity detected by the static electricity detection unit.

[0016] According to this solution, the control unit outputs a wire status signal based on the amount of static electricity detected by the static electricity detection unit. Therefore, the status of the wire in the oil supply guide can be detected based on the wire status signal.

[0017] According to the fourth embodiment, the thread processing apparatus is configured such that, in the thread processing apparatus according to the third embodiment, the control unit outputs the thread status signal based on the relationship between the value of a parameter associated with the amount of static electricity detected by the static electricity detection unit and a threshold value.

[0018] According to this solution, the control unit outputs a wire status signal based on the relationship between the value of a parameter associated with the amount of static electricity detected by the static electricity detection unit and a threshold value. Therefore, it is possible to detect whether the wire in the oil supply guide is in a specified state based on the wire status signal.

[0019] The thread processing apparatus according to the fifth embodiment is configured such that, in the thread processing apparatus according to the fourth embodiment, the value of the parameter is the maximum value of the change in the amount of static electricity detected by the static electricity detection unit.

[0020] According to this scheme, the control unit outputs a wire status signal based on the relationship between the maximum value of the change in electrostatic charge detected by the electrostatic charge detection unit and a threshold value. This allows for the detection of whether the wire in the oil supply guide is in a specified state.

[0021] According to the sixth embodiment, the thread processing apparatus is configured such that, in the thread processing apparatus according to the fourth embodiment, the electrostatic quantity detection unit detects the electrostatic quantity by detecting the voltage or current generated in the oil supply guide due to the electrostatic charge generated in the oil supply guide, and the value of the parameter is the value of the voltage or current detected by the electrostatic quantity detection unit.

[0022] According to this scheme, the control unit outputs a wire status signal based on the relationship between the voltage or current value generated in the oil supply guide due to static electricity detected by the electrostatic detection unit and a threshold value. This allows for the detection of whether the wire in the oil supply guide is in a specified state.

[0023] The thread processing apparatus according to the seventh embodiment is configured such that, in the thread processing apparatus according to the third embodiment, it includes a plurality of oil supply guides individually provided for a plurality of threads, the electrostatic quantity detection unit detects the electrostatic quantity in each of the plurality of oil supply guides, and the control unit outputs the thread status signal based on the difference between the electrostatic quantity in each oil supply guide detected by the electrostatic quantity detection unit and the electrostatic quantity in the oil supply guides other than that oil supply guide.

[0024] According to this solution, when multiple oil supply guides are provided, the control unit outputs a wire status signal based on the difference between the static electricity in each oil supply guide and the static electricity in other oil supply guides. This allows for the detection of whether the wire in the oil supply guide is in a specified state.

[0025] According to the eighth embodiment, the thread processing device is configured such that, in the thread processing device according to the seventh embodiment, a plurality of the oil supply guides are arranged in a row, and the control unit outputs the thread status signal based on the difference between the electrostatic quantity in each oil supply guide detected by the electrostatic quantity detection unit and the electrostatic quantity in the adjacent oil supply guide of that oil supply guide.

[0026] When multiple oil supply guides are arranged in a row, if the state of the wires in multiple oil supply guides is the same, the difference between the static electricity in each oil supply guide and the static electricity in adjacent oil supply guides is likely to be minimal. Furthermore, when the state of the wires in a certain oil supply guide changes, the difference between the static electricity in that oil supply guide and the static electricity in adjacent oil supply guides is likely to increase. Therefore, in this solution, the control unit outputs a wire state signal based on the difference between the static electricity in each oil supply guide and the static electricity in adjacent oil supply guides. This allows for the detection of whether the state of the wires in the oil supply guides is in a specified state.

[0027] The thread processing apparatus according to the ninth embodiment is configured such that, in any of the first to eighth embodiments of the thread processing apparatus, a support member is provided, the support member is conductive, and supports the oil supply guide, the oil supply guide being insulated from the support member.

[0028] In this design, since the conductive or semi-conductive oil supply guide is insulated from the conductive support component, no current flows from the oil supply guide to the support component. Consequently, the amount of static electricity generated in the oil supply guide due to the contact between the wire and the guide is increased, making it easier to detect the condition of the wire based on the amount of static electricity in the guide.

[0029] According to the tenth embodiment, the thread processing apparatus is configured such that, in any one of the first to eighth embodiments, the oil supply guide is semi-conductive, the thread processing apparatus includes a support member that is conductive and supports the oil supply guide, and the oil supply guide is in communication with the support member.

[0030] From the perspective of detecting the state of the wire based on the amount of static electricity generated in the oil supply guide, it is preferable that the amount of static electricity generated in the oil supply guide due to the contact between the wire and the oil supply guide is large. On the other hand, considering the influence of static electricity generated in the oil supply guide on the wire, it is preferable that the amount of static electricity generated in the oil supply guide is not too large.

[0031] In this design, a semi-conductive oil supply guide is connected to a conductive support component. Therefore, when static electricity is generated in the oil supply guide, current flows from the guide to the support component, preventing the amount of static electricity generated in the guide from becoming excessive. Conversely, because the guide is semi-conductive, current is less likely to flow from the guide to the support component compared to a conductive guide. Thus, the amount of static electricity generated in the guide due to the contact between the thread and the guide is not too small, allowing the condition of the thread to be detected based on the amount of static electricity generated in the guide.

[0032] Invention Effects

[0033] According to the present invention, the state of the thread in the oil supply guide can be detected based on the detection result of the amount of static electricity generated in the oil supply guide due to the contact between the traveling thread and the oil supply guide. Furthermore, compared to the case where a dedicated contact member is provided to generate static electricity through contact with the thread, the structure of the thread handling apparatus can be simplified. Attached Figure Description

[0034] Figure 1 This is a general structural diagram of the multiple oil supply guides and stretching section of the spinning and winding machine according to an embodiment of the present invention.

[0035] Figure 2 This is a general structural diagram of the traction section and winding section of the spinning and winding machine according to an embodiment of the present invention.

[0036] Figure 3 (a) is a block diagram showing the electrical connection relationship between the oil supply guide, the electrostatic discharge detection circuit, and the control unit according to an embodiment of the present invention. Figure 3 (b) is a flowchart illustrating the process of processing for outputting the wire status signal in an embodiment of the present invention.

[0037] Figure 4 (a) is a flowchart illustrating the process of processing the output wire status signal in Modification 1. Figure 4 (b) is a flowchart showing the process of processing the output wire status signal in Modified Example 2.

[0038] Figure 5 This is a flowchart illustrating the process of processing the output wire status signal in Modified Example 3.

[0039] Figure 6 This is a diagram used to illustrate the oil supply guide and support components in variation example 4.

[0040] Explanation of reference numerals in the attached figures

[0041] 1: Spinning and winding machine (thread processing device)

[0042] 7: Support components

[0043] 10: Fuel supply guide

[0044] 41: Insulating components

[0045] 51: Electrostatic discharge detection circuit (electrostatic discharge detection unit)

[0046] 52: Control Department Detailed Implementation

[0047] The preferred embodiments of the present invention will be described below.

[0048] <General Components of a Spinning and Winding Machine>

[0049] like Figure 1 and Figure 2 As shown, the spinning and winding machine 1 (the "filament processing device" in this invention) according to this embodiment includes multiple oil supply guides 10, a stretching section 3, a traction section 4, and a winding section 5. It should be noted that, hereinafter, as... Figure 1 and Figure 2 The vertical, forward / backward, and left / right directions are defined as shown in the diagram. The vertical direction is the direction in which gravity acts. The forward / backward, left / right, and vertical directions are orthogonal to each other. Furthermore, as follows... Figure 1 and Figure 2 The diagram illustrates the definitions of the top and bottom sides in the vertical direction, the left and right sides in the horizontal direction, and the front and back sides in the front-back direction.

[0050] <Fuel supply guide>

[0051] like Figure 1 As shown, the spinning section 2 is positioned above the spinning and winding machine 1. The spinning section 2 has multiple spinning units 2A arranged in a row along the left-right direction. Each spinning unit 2A spins multiple filaments F made of molten fiber material such as polyester for forming a single filament Y.

[0052] Multiple oil supply guides 10 are individually provided for multiple spinning units 2A. That is, each oil supply guide 10 is provided for a single yarn Y composed of multiple filaments F spun from the corresponding spinning unit 2A. The multiple oil supply guides 10 are arranged in a row along the left-right direction. The oil supply guide 10 bundles the multiple filaments F spun from the corresponding spinning unit 2A to form a single yarn Y, and applies an oil agent to the yarn Y. The oil supply guide 10 is conductive or semi-conductive and is in contact with the yarn Y.

[0053] In this embodiment, conductivity means that the volume resistivity of a material, such as a metal, is 10⁻⁶. -8 It is made of materials with a volume resistivity of less than Ω·cm. Furthermore, semi-conductivity refers to materials with a volume resistivity of 10 Ω·cm, such as zirconium oxide. -7 Ω·cm or less and greater than 10 -8 It is made of a material with an Ω·cm. In either the case where the oil supply guide 10 is conductive or semi-conductive, when static electricity is generated in the oil supply guide 10 due to contact between the traveling thread Y and the oil supply guide 10, a current will flow through the oil supply guide 10. However, in the case where the oil supply guide 10 is semi-conductive, the magnitude of the current is smaller than that in the case where the oil supply guide 10 is conductive.

[0054] Furthermore, multiple oil supply guides 10 are supported by support members 7 extending in the left-right direction. The support members 7 are conductive. Additionally, an insulating member 41 with insulating properties is disposed between each oil supply guide 10 and the support member 7, thus insulating each oil supply guide 10 from the support member 7. Here, in this embodiment, "insulating" means that the material has a volume resistivity of 10, for example, resin. 8 Made of insulating materials with an Ω·cm or higher.

[0055] <Stretching section>

[0056] The stretching section 3 is positioned below the plurality of oil supply guides 10. The stretching section 3 includes five guide rollers 11a to 11e. These five guide rollers 11a to 11e are rollers whose axial direction is parallel to the front-back direction, and are each driven to rotate by a motor (not shown). Furthermore, each of the five guide rollers 11a to 11e has an internal heater (not shown). The five guide rollers 11a to 11e are housed within a cuboid-shaped insulation box 12. A wire inlet 12a for guiding multiple wires Y into the insulation box 12 and a wire outlet 12b for guiding multiple wires Y from inside the insulation box 12 to the outside are formed on the right side wall of the insulation box 12.

[0057] Multiple filaments Y coated with oil in multiple oil supply guides 10 are arranged in a row by multiple guides 45 of guide units 9A and 9B, and guided from the filament inlet 12a into the heat preservation box 12 by guide roller 13.

[0058] More specifically, the wire guide unit 9A is disposed below the plurality of oil supply guides 10. The wire guide unit 9A has a plurality of wire guides 45 arranged in a row in the left-right direction. The plurality of wire guides 45 of the wire guide unit 9A are individually provided for a plurality of wires Y. The plurality of wires Y coated with oil in the plurality of oil supply guides 10 are arranged in a row in the left-right direction through the plurality of wire guides 45 of the wire guide unit 9A.

[0059] The wire guide unit 9B is positioned below the wire guide unit 9A. The wire guide unit 9B has a plurality of wire guides 45 arranged in a row along the front-to-back direction. The plurality of wire guides 45 of the wire guide unit 9B are individually configured for multiple wires Y. The multiple wires Y have their orientation changed between the wire guide units 9A and 9B, and are arranged in a row along the front-to-back direction by passing through the plurality of wire guides 45 of the wire guide unit 9B.

[0060] The guide roller 13 is a roller parallel to the front-to-back direction and is positioned below the yarn guide unit 9B. Multiple yarns Y, arranged in a row along the front-to-back direction by multiple yarn guides 45 of the yarn guide unit 9B, are transported by the guide roller 13 and guided into the insulation box 12 from the yarn inlet 12a. Furthermore, the multiple yarns Y guided into the insulation box 12 are sequentially wound relative to the five guide rollers 11a to 11e.

[0061] The three guide rollers 11a to 11c on the upstream side are heating rollers used for preheating before stretching multiple filaments Y. The surface temperature of the guide rollers 11a to 11c is set to a temperature above the glass transition temperature of the filament Y. The multiple filaments Y, which are introduced into the heat preservation box 12 from the filament inlet 12a, are preheated to a stretchable temperature, i.e., a temperature above the glass transition temperature, during the conveying process by the three guide rollers 11a to 11c on the upstream side.

[0062] The two downstream guide rollers 11d and 11e are heating rollers used for heat setting of the stretched multiple filaments Y. The surface temperature of the guide rollers 11d and 11e is set to a higher temperature than the surface temperature of the three upstream guide rollers 11a to 11c. Furthermore, the surface speed of the two downstream guide rollers 11d and 11e is higher than the surface speed of the three upstream guide rollers 11a to 11c.

[0063] Furthermore, the multiple filaments Y, preheated by guide rollers 11a to 11c, are stretched by the surface velocity difference between guide rollers 11c and 11d. Additionally, while being conveyed by the two downstream guide rollers 11d and 11e, the multiple filaments Y are heated to a higher temperature, and their stretched state is heat-set. The stretched multiple filaments Y, as described above, are then guided out of the insulation box 12 from the filament outlet 12b. The multiple filaments Y guided out of the insulation box 12 from the filament outlet 12b are then conveyed to the traction unit 4 by guide roller 14.

[0064] In the wire path between the wire outlet 12b and the guide roller 14, multiple interlacing wire guides 8 and wire guide units 9C and 9D are arranged. The multiple interlacing wire guides 8 are individually configured for multiple wires Y and arranged in a row along the front-to-back direction. The interlacing wire guides 8 interlac the wires Y. It should be noted that the configuration of the interlacing wire guides 8 is well known, therefore further detailed description is omitted here.

[0065] The wire guide unit 9C is positioned upstream of the plurality of interlacing wire guides 8 in the wire path. The wire guide unit 9D is positioned downstream of the plurality of interlacing wire guides 8 in the wire path. Wire guide units 9C and 9D each have a plurality of wire guides 45 arranged in a row along the front-back direction at approximately the same intervals as the plurality of interlacing wire guides 8. The plurality of wire guides 45 in wire guide units 9C and 9D are individually configured for a plurality of wires Y. The plurality of wires Y are arranged in a row along the front-back direction by the plurality of wire guides 45 in wire guide unit 9C and the plurality of wire guides 45 in wire guide unit 9D. Furthermore, the plurality of wire guides 45 in wire guide units 9C and 9D respectively support the upstream and downstream portions of the plurality of wires Y located at the intersection of the plurality of interlacing wire guides 8.

[0066] The guide roller 14 is a roller parallel to the front-to-back direction and is located downstream of the yarn path adjacent to the yarn guide unit 9D. Multiple yarns Y, arranged in a row in the front-to-back direction by the multiple yarn guides 45 of the yarn guide unit 9D, are fed to the traction unit 4 by the guide roller 14.

[0067] Traction Unit

[0068] like Figure 2 As shown, the traction unit 4 includes a guide roller 21 and a guide roller 22.

[0069] The guide roller 21 is a roller with its axial direction parallel to the left-right direction, located below the guide roller 14. Furthermore, a guide unit 9E is arranged in the yarn path, located vertically between the guide roller 14 and the guide roller 21, immediately upstream of the guide roller 21. The guide unit 9E has multiple guides 45 arranged in a row along the left-right direction. Each guide 45 in the guide unit 9E is individually configured for multiple yarns Y. The multiple yarns Y have their orientation changed between the guide roller 14 and the guide unit 9E, and after being arranged in a row along the left-right direction by the multiple guides 45 in the guide unit 9E, they are pulled by the guide roller 21. The guide roller 21 is driven to rotate by a motor (not shown), conveying the multiple yarns Y arranged in the left-right direction by the multiple guides 45 in the guide unit 9E to the guide roller 22.

[0070] The guide roller 22 is a roller with its axial direction parallel to the left-right direction, and is positioned rearward than the guide roller 21. Furthermore, a guide unit 9F is disposed in the yarn path immediately upstream of the guide roller 22. The guide unit 9F has multiple guides 45 arranged in a row along the left-right direction. The guide unit 9F is individually configured for multiple yarns Y. The multiple yarns Y are arranged in a row in the left-right direction by passing through the multiple guides 45 of the guide unit 9F. The guide roller 22 is driven to rotate by a motor (not shown), conveying the multiple yarns Y arranged in the left-right direction by the multiple guides 45 of the guide unit 9F to the take-up unit 5.

[0071] Furthermore, the traction unit 4 also includes a guide rail 23, which extends in a manner that the further back it is in the front-rear direction, the higher it is in the vertical direction. The guide roller 22 and the guide unit 9F are mounted on a slider 24 that can move along the guide rail 23. The slider 24 is connected to a motor (not shown) via a pulley (not shown), a belt (not shown), etc. When the motor is driven, the slider 24 moves along the guide rail 23. Thus, the guide roller 22 and the guide unit 9F can... Figure 2 The solid line indicates the rear position during the winding of thread Y, and... Figure 2 The single-dot dashed line indicates the movement between the positions near the front of the guide roller 21 during wire hanging.

[0072] <Curling Section>

[0073] The take-up section 5 includes multiple traverse devices 30, a turntable 71, contact rollers 73, and two bobbin supports 72. The multiple traverse devices 30 are individually configured for multiple yarns Y and are arranged in a row along the front-to-back direction. Each traverse device 30 has a fulcrum guide 61 and a traverse guide 62.

[0074] Multiple fulcrum guides 61 of multiple traverse devices 30 are arranged in a row along the front-rear direction. Each fulcrum guide 61 of the multiple traverse devices 30 is mounted on a separate slider 67. The sliders 67 are supported so as to be movable along a guide rail 68 extending in the front-rear direction. Furthermore, the sliders 67 are connected to a cylinder (not shown). When the cylinder is driven, the sliders 67 move along the guide rail 68 in the front-rear direction. Thus, the multiple fulcrum guides 61 can be moved between a position where they are separated from each other in the front-rear direction during yarn Y winding and a forward-biased position during yarn hanging.

[0075] like Figure 2 As shown, multiple traverse guides 62 of the multiple traverse devices 30 are positioned downstream of the corresponding pivot guide 61 in the direction of travel of the yarn Y, and are arranged in a row in the front-back direction. The traverse guides 62 are driven by a motor (not shown) to cause the yarn Y to traverse in the front-back direction with the pivot guide 61 as the center.

[0076] The turntable 71 is a circular plate-shaped component with its axis parallel to the front-back direction. The turntable 71 is driven to rotate by a motor (not shown). Two bobbin supports 72, each with its axis parallel to the front-back direction, are rotatably supported on the upper and lower ends of the turntable 71. Multiple bobbins B, individually configured for multiple threads Y, are arranged and mounted on each bobbin support 72 along the front-back direction. Furthermore, each of the two bobbin supports 72 is independently driven to rotate by a motor (not shown).

[0077] Therefore, when the upper bobbin support 72 is driven to rotate, the thread Y, which is laterally moved by the lateral movement device 30, is wound onto the bobbin B to form a roll P. Furthermore, after the roll P is formed, the upper and lower positions of the two bobbin supports 72 are switched by rotating the turntable 71. As a result, the bobbin support 72, previously located on the lower side, moves to the upper side, allowing the thread Y to be wound onto the bobbin B mounted on that bobbin support 72 to form the roll P. Additionally, the bobbin support 72, previously located on the upper side, moves to the lower side, allowing the roll P to be retrieved.

[0078] The contact roller 73 is a roller whose axial direction is parallel to the front-back direction. The contact roller 73 is disposed above the upper bobbin support 72. The contact roller 73 applies contact pressure to the surface of the multiple rolls P formed by winding yarn Y on the bobbin B mounted on the upper bobbin support 72.

[0079] <Detection of the condition of the threads in the oil supply guide>

[0080] Next, the detection of the state of the wire Y in the multiple oil supply guides 10 will be explained.

[0081] like Figure 3 As shown in (a), in addition to the above-described structure, the spinning and winding machine 1 also includes multiple electrostatic discharge detection circuits 51 and a control unit 52. Each electrostatic discharge detection circuit 51 is individually provided for each of the multiple oil supply guides 10 and is electrically connected to the corresponding oil supply guide 10. The electrostatic discharge detection circuit 51 outputs a signal corresponding to the amount of electrostatic discharge generated in the oil supply guide 10. It should be noted that in this embodiment, the combination of multiple electrostatic discharge detection circuits 51 is equivalent to the "electrostatic discharge detection unit" of the present invention.

[0082] The control unit 52 outputs a wire state signal indicating whether the state of the wire Y in the oil supply guide 10 is in a predetermined state, based on the signal output from each of the multiple electrostatic quantity detection circuits 51. A predetermined state for the wire Y in the oil supply guide 10 means, for example, that the tension of the wire Y in the oil supply guide 10 is within the normal range, that none of the multiple filaments F introduced into the oil supply guide 10 has broken, or that the wire Y has not broken near the oil supply guide 10, etc. Conversely, a non-predetermined state for the wire Y in the oil supply guide 10 means, for example, that the tension of the wire Y in the oil supply guide 10 is outside the normal range, that any of the multiple filaments F introduced into the oil supply guide 10 has broken, or that the wire Y has broken near the oil supply guide 10, etc.

[0083] It should be noted that the control unit 52 also controls the operation of motors (not shown) used to drive various parts of the spinning take-up machine 1, but detailed descriptions are omitted here.

[0084] Next, the output of the aforementioned wire status signal by the control unit 52 will be described in detail. The control unit 52, for each of the plurality of electrostatic discharge detection circuits 51, according to... Figure 3 The flowchart in (b) is processed to output the aforementioned thread status signal. For Figure 3 The flowchart of (b) will be described in detail. Specifically, the control unit 52 first calculates the maximum value of the change in static electricity during the period from the time before the predetermined time to the present, i.e., the maximum change ΔE (S101). It should be noted that in this embodiment, the value of the maximum change ΔE is equivalent to the "value of the parameter associated with the static electricity" in this invention.

[0085] Next, the control unit 52 determines whether the calculated maximum change ΔE is below the threshold ΔEa (S102). If the maximum change ΔE is below the threshold ΔEa (S102: Yes), the control unit 52 outputs a first signal indicating that the state of the thread Y in the oil supply guide 10 is a predetermined state as a thread state signal (S103). If the maximum change ΔE is greater than the threshold ΔEa (S102: No), the control unit 52 outputs a second signal indicating that the state of the thread Y in the oil supply guide 10 is not a predetermined state as a thread state signal (S104). Then, after the thread state signals in S103 and S104 are output, the processing returns to S101.

[0086] <Effect>

[0087] In this embodiment, the state of the thread Y can be detected based on the detection result of the amount of static electricity generated in the oil supply guide 10 due to the contact between the traveling thread Y and the oil supply guide 10.

[0088] Furthermore, in the case where a dedicated contact component is separately provided to generate static electricity through contact with the yarn Y, unlike the present invention, the number of parts increases, and space needs to be ensured for arranging the contact component, making the structure of the spinning take-up machine 1 more complex. In contrast, in this embodiment, in the spinning take-up machine 1 equipped with the oil supply guide 10, the amount of static electricity generated in the oil supply guide 10 due to the contact between the yarn Y and the oil supply guide 10 is detected by the static electricity detection circuit 51. Therefore, compared to the case where the aforementioned dedicated contact component is separately provided, the structure of the spinning take-up machine 1 can be simplified.

[0089] Furthermore, in this embodiment, multiple filaments F spun from the spinning section 2 are guided into the oil supply guide 10 to form a single thread Y. In this regard, the state of the multiple filaments F and the thread Y formed by the multiple filaments F being guided into the oil supply guide 10 can be detected based on the amount of static electricity in the oil supply guide 10, and thus the state of the thread Y in the oil supply guide 10 can be determined.

[0090] Furthermore, in this embodiment, based on the signal output by the electrostatic detection circuit 51 corresponding to the amount of electrostatic charge in the oil supply guide 10, the control unit 52 outputs a thread state signal indicating the state of the thread Y. Specifically, the control unit 52 outputs a thread state signal indicating whether the state of the thread Y in the oil supply guide 10 is a predetermined state based on the maximum value of the change in the amount of electrostatic charge generated in the oil supply guide 10, i.e., the relationship between the maximum change ΔE and the threshold ΔEa. Thus, it is possible to detect whether the state of the thread Y in the oil supply guide 10 is in a predetermined state based on the thread state signal.

[0091] Furthermore, in this embodiment, when the multiple oil supply guides 10 are conductive or semi-conductive, and the support member 7 supporting the multiple oil supply guides 10 is conductive, each oil supply guide 10 is insulated from the support member 7 by the insulating member 41. Therefore, no current flows from the oil supply guide 10 to the support member 7. As a result, the amount of static electricity generated in the oil supply guide 10 due to the contact between the thread Y and the oil supply guide 10 increases, making it easier to detect the state of the thread based on the amount of static electricity in the oil supply guide 10.

[0092] <Variation Example>

[0093] The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical solution described.

[0094] In the above embodiment, the control unit 52 outputs a wire status signal based on the maximum value of the change in the amount of static electricity in the oil supply guide 10, i.e., the maximum change ΔE, but is not limited thereto.

[0095] In Modification 1, the electrostatic discharge detection circuit 51 detects the voltage generated in the oil supply guide 10 due to static electricity generated in the oil supply guide 10, and outputs a signal corresponding to its voltage value V. The greater the amount of static electricity generated in the oil supply guide 10, the greater the voltage value V. It should be noted that in Modification 1, the voltage value V corresponds to the "value of the parameter associated with the amount of static electricity" in this invention.

[0096] Furthermore, the control unit 52, for each of the multiple electrostatic discharge detection circuits 51, according to Figure 4The process is performed on flowchart (a) to output a thread status signal. Specifically, the control unit 52 first obtains the voltage value V based on the signal output from the electrostatic discharge detection circuit 51 (S201).

[0097] Next, the control unit 52 determines whether the voltage value V is within the range of voltage value Va above and voltage value Vb below (S202). It should be noted that in Modification 1, voltage value Va and voltage value Vb are respectively equivalent to the "threshold" of the present invention.

[0098] When the voltage value V is within the range of voltage value Va and voltage value Vb (S202: Yes), the control unit 52 outputs a first signal as a thread status signal (S203). When the voltage value V is lower than voltage value Va or higher than voltage value Vb (S202: No), the control unit 52 outputs a second signal as a thread status signal (S204). Then, after the thread status signals in S203 and S204 are output, the processing returns to S201.

[0099] In Modification 1, the control unit 52 outputs a wire state signal based on the relationship between the voltage value V generated in the oil supply guide 10 due to static electricity and the voltage values ​​Va and Vb, which serve as thresholds. Thus, it is possible to detect whether the state of the wire Y in the oil supply guide 10 is in a predetermined state based on the wire state signal.

[0100] In Modification 2, the electrostatic discharge detection circuit 51 detects the current generated in the oil supply guide 10 due to static electricity generated in the oil supply guide 10, and outputs a signal corresponding to its current value I. Here, the greater the amount of static electricity generated in the oil supply guide 10, the greater the current value I. It should be noted that in Modification 2, the current value I corresponds to the "value of the parameter associated with the amount of static electricity" of the present invention.

[0101] Furthermore, the control unit 52, for each of the multiple electrostatic discharge detection circuits 51, according to Figure 4 The process is performed on the flowchart in (b) to output a wire status signal. Specifically, the control unit 52 first obtains the current value I based on the signal output from the electrostatic detection circuit 51 (S301).

[0102] Next, the control unit 52 determines whether the current value I is within the range of current value Ia above and current value Ib below (S302). It should be noted that in Modification 2, current value Ia and current value Ib are respectively equivalent to the "threshold" of the present invention.

[0103] When the current value I is within the range of current value Ia and current value Ib (S302: Yes), the control unit 52 outputs a first signal as a thread status signal (S303). When the current value I is lower than current value Ia or higher than current value Ib (S302: No), the control unit 52 outputs a second signal as a thread status signal (S304). Then, after the thread status signals in S303 and S304 are output, the processing returns to S301.

[0104] In Modification 2, the control unit 52 outputs a wire state signal based on the relationship between the current value I generated in the oil supply guide 10 due to static electricity and the current values ​​Ia and Ib, which serve as thresholds. Therefore, it is possible to detect whether the state of the wire Y in the oil supply guide 10 is in a predetermined state based on the wire state signal.

[0105] In addition, the wire status signal can be output based on the relationship between the values ​​of parameters related to the amount of static electricity generated in the oil supply guide 10 and threshold values, except for the maximum change ΔE of the amount of static electricity generated in the oil supply guide 10, the voltage value V of the voltage generated in the oil supply guide 10 due to the static electricity generated in the oil supply guide 10, and the current value I of the current generated in the oil supply guide 10 due to the static electricity generated in the oil supply guide 10.

[0106] Furthermore, a wire status signal can be output based on the difference in electrostatic charge between the multiple oil supply guides 10. For example, in Modification 3, the electrostatic charge detection circuit 51 outputs a signal corresponding to the amount of electrostatic charge generated in the oil supply guides 10. Moreover, the control unit 52 adjusts the output signal according to the electrostatic charge level of each of the multiple electrostatic charge detection circuits 51. Figure 5 The flowchart is processed to output the wire status signal.

[0107] Specifically, the control unit 52 first calculates the electrostatic difference Ed, which is the difference between the electrostatic quantity represented by the signal output from the electrostatic quantity detection circuit 51 and the electrostatic quantity represented by the signal output from the electrostatic quantity detection circuit 51 provided for the adjacent oil supply guide 10 (S401).

[0108] At this time, regarding the electrostatic quantity detection circuit 51 provided for the foremost oil supply guide 10, the difference between the electrostatic quantity represented by the signal output from the electrostatic quantity detection circuit 51 provided for the oil supply guide 10 and the electrostatic quantity represented by the signal output from the electrostatic quantity detection circuit 51 provided for the adjacent oil supply guide 10 on the rear side is calculated as the electrostatic quantity difference Ed.

[0109] Furthermore, regarding the electrostatic discharge detection circuit 51 provided for the oil supply guide 10 on the rear side, the difference between the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for the oil supply guide 10 and the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for the adjacent oil supply guide 10 on the front side of the oil supply guide 10 is calculated as the electrostatic discharge difference Ed.

[0110] Furthermore, regarding the electrostatic discharge detection circuit 51 provided for each of the oil supply guides 10 except for the foremost and rearmost oil supply guides 10, the difference between the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for that oil supply guide 10 and the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for the adjacent oil supply guide 10 on the front or rear side is calculated as the electrostatic discharge difference Ed. Alternatively, for example, the electrostatic discharge difference Ed can also be calculated as the average value of the difference between the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for that oil supply guide 10, the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for the adjacent oil supply guide 10 on the front side, and the electrostatic discharge represented by the signal output from the electrostatic discharge detection circuit 51 provided for the adjacent oil supply guide 10 on the rear side.

[0111] Next, the control unit 52 determines whether the electrostatic difference Ed is below the threshold Eda (S402). If the electrostatic difference Ed is below the threshold Eda (S402: Yes), the control unit 52 outputs a first signal as a thread status signal (S403). If the electrostatic difference Ed is greater than the threshold Eda (S402: No), the control unit 52 outputs a second signal as a thread status signal (S404). Then, after the thread status signals are output in S403 and S404, the processing returns to S401.

[0112] In Modification 3, the control unit 52 outputs a wire status signal based on the difference between the static electricity in the oil supply guide 10 and the static electricity in another oil supply guide 10. Therefore, it is possible to detect whether the state of the wire Y in the oil supply guide 10 is in a predetermined state based on the wire status signal.

[0113] Furthermore, when multiple oil supply guides 10 are arranged in a row, as in Modification 3, the difference between the static electricity in each oil supply guide 10 and the static electricity in adjacent oil supply guides 10 is likely to be minimal when the state of the thread Y in the multiple oil supply guides 10 is the same. Moreover, when the state of the thread Y in a certain oil supply guide 10 changes, the difference between the static electricity in that oil supply guide 10 and the static electricity in adjacent oil supply guides 10 is likely to increase. Therefore, in Modification 3, the control unit 52 outputs a thread state signal based on the difference between the static electricity in each oil supply guide 10 and the static electricity in adjacent oil supply guides 10. Thus, it is possible to detect whether the state of the thread Y in the oil supply guide 10 is in a predetermined state based on the thread state signal.

[0114] Furthermore, in Modification 3, the difference between the electrostatic quantity represented by the signal output from the electrostatic quantity detection circuit 51 provided for each oil supply guide 10 and the electrostatic quantity represented by the signal output from the electrostatic quantity detection circuit 51 provided for oil supply guides 10 other than the adjacent oil supply guides 10 can be calculated as the electrostatic quantity difference Ed. In this case, the multiple oil supply guides 10 may or may not be arranged in a row.

[0115] Furthermore, in the above embodiments, the plurality of oil supply guides 10 are conductive or semi-conductive, the support member 7 supporting the plurality of oil supply guides 10 is conductive, and each oil supply guide 10 and the support member 7 are insulated from each other by an insulating member 41. However, this is not a limitation.

[0116] In Modification 4, each of the plurality of oil supply guides 10 is semi-conductive. On the other hand, the support member 7 is conductive, similar to the embodiment described above. Furthermore, in Modification 4, as... Figure 6 As shown, no insulating component 41 is provided between each oil supply guide 10 and the support component 7 (see [reference]). Figure 1 Each oil supply guide 10 is in direct contact with the support component 7. Thus, each oil supply guide 10 is electrically connected to the support component 7.

[0117] From the perspective of detecting the state of the thread Y based on the amount of static electricity generated in the oil supply guide 10, it is preferable that the amount of static electricity generated in the oil supply guide 10 due to the contact between the thread Y and the oil supply guide 10 is large. On the other hand, considering the influence of the static electricity generated in the oil supply guide 10 on the thread Y, it is preferable that the amount of static electricity generated in the oil supply guide 10 is not too large.

[0118] In Modification 4, the semi-conductive oil supply guide 10 is connected to the conductive support member 7. Therefore, when static electricity is generated in the oil supply guide 10, current flows from the oil supply guide 10 to the support member 7, thus preventing the amount of static electricity in the oil supply guide 10 from becoming excessive. On the other hand, since the oil supply guide 10 is semi-conductive, current is less likely to flow from the oil supply guide 10 to the support member 7 compared to the case where the oil supply guide 10 is conductive. Therefore, the amount of static electricity generated in the oil supply guide 10 due to the contact between the thread Y and the oil supply guide 10 is not too small, and the state of the thread Y can be detected based on the amount of static electricity generated in the oil supply guide 10.

[0119] Furthermore, in the above example, the oil supply guide 10 is generally conductive or semi-conductive, but is not limited to this. In the oil supply guide 10, only a portion, including the contact portion that contacts the thread Y, may be conductive or semi-conductive. In this case, the electrostatic discharge detection circuit 51 can output a signal corresponding to the amount of electrostatic discharge generated in the oil supply guide 10 due to contact with the thread Y.

[0120] Furthermore, in this case, the oil supply guide 10 may have a portion that is conductive or semi-conductive, including the contact portion that contacts the thread Y, and this portion of the oil supply guide 10 may be insulated from the support member 7. Alternatively, the oil supply guide 10 may have a portion that is semi-conductive, including the contact portion that contacts the thread Y, and this portion of the oil supply guide 10 may be conductive to the support member 7.

[0121] Furthermore, in the above example, multiple oil supply guides 10 are supported by a common support member 7, but multiple oil supply guides 10 may also be supported by individual support members. Alternatively, two or more portions of the multiple oil supply guides 10 may each be supported by a common support member. Furthermore, in the above example, the support member 7 supporting the oil supply guides 10 is conductive, but the support member 7 may also be insulating.

[0122] Furthermore, in the above example, the control unit 52 outputs a thread status signal indicating whether the state of the thread Y in the oil supply guide 10 is a predetermined state, but it is not limited to this. The control unit 52 may also output a thread status signal indicating whether the state of the thread Y in the oil supply guide 10 is a state other than a predetermined state, based on the signal output from the electrostatic detection circuit 51. For example, the control unit 52 may output a thread status signal indicating the tension of the thread Y in the oil supply guide 10, based on the signal output from the electrostatic detection circuit 51.

[0123] Furthermore, in the above example, the spinning and winding machine 1 includes a control unit 52, which outputs a yarn state signal indicating the state of yarn Y based on the signal output from the electrostatic quantity detection circuit 51, but is not limited to this. For example, the spinning and winding machine may not include a control unit 52. Moreover, the multiple electrostatic quantity detection circuits 51 of the spinning and winding machine can be connected to an external processing device such as a PC, and the state of yarn Y can be detected based on the signal output from the electrostatic quantity detection circuit 51 in this processing device.

[0124] Furthermore, the above description pertains to an example of applying the present invention to a spinning take-up machine, which includes an oil supply guide 10. Multiple filaments F spun from the spinning section 2 are guided into the oil supply guide, and the oil supply guide applies oil to the yarn Y formed by bundling the multiple filaments F. However, the invention is not limited to this. The present invention can also be applied to yarn processing devices other than spinning take-up machines that have an oil supply guide. Furthermore, in this case, the yarn processing device is not limited to a yarn processing device with multiple oil supply guides that processes multiple yarns; it can also be a yarn processing device with only one oil supply guide that processes one yarn.

Claims

1. A thread treatment device, characterized by, Possessing: an oil supply guide that comes into contact with a traveling yarn, at least a contact portion of the yarn with which the oil supply guide comes into contact has electrical conductivity or semi-conductivity, and applies an oil agent to the yarn; and an electrostatic amount detection section that detects an electrostatic amount of static electricity generated in the oil supply guide.

2. The yarn processing apparatus according to claim 1, characterized in that a plurality of filaments spun out from a spinning section are introduced into the oil supply guide, and the oil supply guide applies an oil agent to the yarn formed by bundling the plurality of filaments, wherein the spinning section spins the plurality of filaments used to form one of the yarns.

3. The yarn processing apparatus according to claim 1 or 2, characterized in that a control section that outputs a yarn state signal indicating a state of the yarn in the oil supply guide in accordance with the electrostatic amount detected by the electrostatic amount detection section is possessed.

4. The yarn processing apparatus according to claim 3, characterized in that the control section outputs the yarn state signal in accordance with a magnitude relationship between a value of a parameter associated with the electrostatic amount detected by the electrostatic amount detection section and a threshold value.

5. The yarn processing apparatus according to claim 4, characterized in that the value of the parameter is a maximum value of a change amount of the electrostatic amount detected by the electrostatic amount detection section.

6. The yarn processing apparatus according to claim 4, characterized in that the electrostatic amount detection section detects the electrostatic amount by detecting a voltage or a current generated in the oil supply guide due to static electricity generated in the oil supply guide, the value of the parameter is a value of the voltage or the current detected by the electrostatic amount detection section.

7. The yarn processing apparatus according to claim 3, characterized in that a plurality of the oil supply guides individually provided for a plurality of the yarns are possessed, the electrostatic amount detection section detects the electrostatic amount in each of the plurality of the oil supply guides, the control section outputs the yarn state signal in accordance with a difference between the electrostatic amount in each of the plurality of the oil supply guides and the electrostatic amount in the oil supply guide other than the oil supply guide.

8. The yarn processing apparatus according to claim 7, characterized in that the plurality of the oil supply guides are arranged in a row, the control section outputs the yarn state signal in accordance with a difference between the electrostatic amount in each of the plurality of the oil supply guides and the electrostatic amount in the adjacent oil supply guide of the oil supply guide.

9. The yarn processing apparatus according to any one of claims 1 to 8, characterized in that a support member that has electrical conductivity and supports the oil supply guide is possessed, the oil supply guide is insulated from the support member.

10. The yarn processing apparatus according to any one of claims 1 to 8, characterized in that the oil supply guide has semi-conductivity, the yarn processing apparatus possesses a support member that has electrical conductivity and supports the oil supply guide, the oil supply guide is in conduction with the support member.

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