spinning machine

Abstract

To provide a spinning machine that is less likely to have the conveyance of mist-like additives obstructed. [Solution] The additive section 90 of the spinning machine comprises a storage section 93, a nozzle 60, a first guide section 61, a second guide section 62, and a discharge section 55. The storage section 93 stores liquid additives. The nozzle 60 generates a floating additive, which is a foamy or misty additive, by supplying compressed air from the injection hole 60c. The floating additive generated by the nozzle 60 flows through the first guide section 61 and is discharged from the first opening 61b located above the injection hole 60c. The second guide section 62 has a space through which the floating additive discharged from the first opening 61b flows and is discharged from the second opening 62b located below the first opening 61b. The discharge section 55 discharges the misty additive generated in the storage section 93 to the outside of the storage section 93.

Description

[Technical Field]

[0001] The present invention relates primarily to a spinning machine that supplies air containing an additive to a spinning unit. [Background technology]

[0002] The spinning machine of Patent Document 1 includes a first spinning pipe, an additive supply device, and a delivery pipe. The first spinning pipe supplies compressed air toward the spinning units. The additive supply device supplies compressed air to the additive from a nozzle and turns the additive into mist by bubbling, thereby generating air containing the additive. The delivery pipe supplies the air containing the additive to the first spinning pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-143382 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 does not describe the detailed configuration of a nozzle or the like for turning the additive into a mist. Here, when compressed air is supplied to the additive, not only the additive in a mist form but also the additive in a foam form is generated. For example, when the additive in a foam form is generated, if the size of the bubbles is too large, the transport of the additive in a mist form may be hindered.

[0005] The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a spinning machine in which the transport of the mist-like additive is not easily hindered.

[0006] The problem to be solved by the present invention is as described above. Next, the means for solving this problem and the effects thereof will be explained.

[0007] In view of the present invention, a spinning machine having the following configuration is provided. That is, the spinning machine comprises a plurality of spinning units, piping, and an additive unit. The spinning units generate and wind yarn. Compressed air flows through the piping toward the spinning units. The additive unit generates additive air containing an additive and supplies the additive air to the piping. The additive unit comprises a storage unit, a nozzle, a first guide unit, a second guide unit, and a discharge unit. The storage unit stores the liquid additive. The nozzle has an injection hole, and by supplying compressed air from the injection hole to the additive stored in the storage unit, a floating additive, which is in the form of foam or mist, is generated. The first guide unit extends vertically and covers at least the injection hole, forming a space through which the floating additive generated by the nozzle flows, and discharges the floating additive from a first opening located above the injection hole. The second guide section has a space through which the suspended additive discharged from the first opening flows, and the suspended additive is discharged from the second opening located below the first opening. The discharge section discharges the mist-like additive generated in the storage section to the outside of the storage section.

[0008] By restricting the passage of the suspended additive using the first and second guide sections, it is possible to suppress the discharge of foamy additives and to suppress the expansion of foam size. This makes it less likely for the transport of mist-like additives to be hindered.

[0009] In the spinning machine described above, the additive section preferably has a space through which the suspended additive discharged from the second opening flows, and a third guide section that discharges the suspended additive from a third opening located above the second opening.

[0010] This further suppresses the expansion of bubble size in foamy additives.

[0011] In the aforementioned spinning machine, the following configuration is preferable. That is, the additive section comprises an introduction passage and an internal check valve. The introduction passage moves integrally with the storage section, and compressed air flows toward the nozzle through it. The internal check valve is positioned in the introduction passage and allows the fluid toward the nozzle to pass through, while suppressing the passage of fluid from the nozzle toward the introduction passage.

[0012] This prevents the additive from flowing from the adding section to the compressed air supply side. Also, because the introduction passage and internal check valve move integrally with the reservoir section, backflow of fluid can be prevented even when the reservoir section is temporarily repositioned for maintenance or other work.

[0013] The above-mentioned spinning machine is preferably configured as follows: the injection hole is formed in a direction that supplies compressed air upward, the diameter of the injection hole is 0.5 mm or more and 1 mm or less, and the number of injection holes is 4 or more and 12 or less.

[0014] By supplying compressed air upward, the floating additive tends to flow toward the first opening, which is located above the injection holes. The diameter and number of injection holes affect the state of the floating additive generated by the nozzle (for example, the size and amount of bubbles), and by setting the diameter and number of injection holes in the above ranges, an appropriate state can be achieved.

[0015] The spinning machine is preferably configured as follows: the first guide section is formed with an inlet hole for allowing the additive to flow into the first guide section, the diameter of the inlet hole is 0.5 mm or more and 3 mm or less, and the number of the inlet holes is 2 or more and 8 or less.

[0016] The diameter and number of the inlet holes affect the amount of additive that flows into the first guide portion, and by setting the diameter and number within the above ranges, an appropriate amount of additive can be allowed to flow.

[0017] In the spinning machine described above, the following configuration is preferable. That is, the storage section comprises a first bottom and a second bottom located below the first bottom. In a plan view, the nozzle and the first guide overlap with at least a portion of the second bottom. The second container section formed between the first bottom and the second bottom in the vertical direction has a smaller cross-sectional area of ​​the effective volume portion when cut by a plane perpendicular to the vertical direction than the first container section formed above the first bottom. The injection hole is located below the first bottom.

[0018] This allows the adding section to generate added air even when only a relatively small amount of additive remains in a state where the water level of the additive falls below the first bottom portion.

[0019] In the spinning machine, the first guide section preferably has a flow path cross-sectional area of ​​100 square mm or more and 3000 square mm or less.

[0020] The cross-sectional area of ​​the flow path of the first guide portion affects the ease with which the floating additive will liquefy and the size of the bubbles, and by setting it within the above range, an appropriate state can be achieved.

[0021] The spinning machine preferably has the following configuration: the storage unit includes a float and a detection unit, the float floats in the additive, and the detection unit detects the position of the float in the vertical direction.

[0022] This allows the remaining amount of additive to be detected.

[0023] In the spinning machine described above, the following configuration is preferable. That is, the discharge section comprises a discharge passage and an external check valve. The discharge passage moves integrally with the storage section, and the mist-like additive flows from the discharge section toward the piping. The external check valve is positioned in the discharge passage and allows the fluid toward the piping to pass through, while suppressing the passage of fluid from the piping toward the discharge section.

[0024] This prevents the additive from flowing back from the piping toward the adding portion. Also, since the discharge passage and the external check valve move integrally with the reservoir portion, handling is easy.

[0025] In the spinning machine, the external check valve preferably has a flow path cross-sectional area of ​​40 mm 2 or more and 1000 mm 2 or less.

[0026] This makes it possible to make it difficult for mist-like additive particles to collide with each other and become liquefied. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a front view showing the overall configuration of a spinning machine according to an embodiment of the present invention; [Figure 2] FIG. 2 is a diagram showing the configuration of a compressed air supply unit and an adding unit. [Figure 3] FIG. 3 is a cross-sectional view of the addition portion viewed along the horizontal direction. DETAILED DESCRIPTION OF THE INVENTION

[0028] Next, the spinning machine 1 of this embodiment will be described. As shown in Fig. 1, the spinning machine 1 includes a blower box 3, a control box 5, a plurality of spinning units 7, and a yarn splicing cart 9. The plurality of spinning units 7 are arranged side by side in a predetermined direction.

[0029] Inside the blower box 3, a blower 11 that functions as a negative pressure source and the like are arranged.

[0030] A central control device 13 and a display unit 15 are arranged inside the control box 5. The central control device 13 centrally manages and controls each part of the spinning machine 1. The central control device 13 can communicate with each spinning unit 7 (more specifically, the unit control unit). The display unit 15 displays a screen or the like based on information received by the central control device 13 from the spinning unit 7.

[0031] Each spinning unit 7 mainly includes, arranged in this order from upstream to downstream, a draft device 21, an air spinning device 23, a yarn storage device 25, and a winding device 27. In describing the spinning unit 7, "upstream" and "downstream" mean upstream and downstream in the running direction of the sliver, fiber bundle 34, or spun yarn 30 when winding the spun yarn 30.

[0032] The draft device 21 is provided near the upper end of a frame 36 included in the spinning machine 1. The draft device 21 includes four pairs of draft rollers. The draft device 21 sandwiches and transports sliver supplied from a sliver case (not shown) between the rollers of each draft roller pair, thereby stretching the sliver to a predetermined fiber amount and generating a fiber bundle 34. The fiber bundle 34 generated by the draft device 21 is supplied to an air spinning device 23 arranged downstream of the draft device 21.

[0033] The air spinning device 23 uses a swirling airflow to twist the fiber bundle 34 drafted by the draft device 21, producing the spun yarn 30. More specifically, the air spinning device 23 includes a fiber guide section (not shown), a spinning chamber, a spinning nozzle (a swirling airflow generating nozzle), and a hollow guide shaft. The fiber guide section guides the fiber bundle 34 supplied from the draft device 21 into the spinning chamber. The spinning nozzle is disposed around the path along which the fiber bundle 34 travels. Compressed air is sprayed from the spinning nozzle into the spinning chamber, generating a swirling airflow within the spinning chamber. This swirling airflow causes the fiber ends of the multiple fibers that make up the fiber bundle 34 to invert and swirl. The hollow guide shaft guides the produced spun yarn 30 from the spinning chamber to the outside of the air spinning device 23.

[0034] A yarn monitoring device 24 is provided downstream of the air spinning device 23. The spun yarn 30 produced by the air spinning device 23 passes through the yarn monitoring device 24 before being stored in the yarn storage device 25.

[0035] The yarn monitoring device 24 monitors the thickness and other characteristics of the traveling spun yarn 30 using a light transmission sensor, and detects yarn defects in the spun yarn 30. When the yarn monitoring device 24 detects a yarn defect in the spun yarn 30, it transmits a yarn defect detection signal to the unit control unit.

[0036] When the unit control unit receives a yarn defect detection signal from the yarn monitoring device 24, it cuts the spun yarn 30 by stopping the driving of the air spinning device 23 and / or the draft device 21. The spun yarn 30 may also be cut using a cutter.

[0037] The yarn pooling device 25 includes a yarn pooling roller 38. The yarn pooling roller 38 is driven to rotate by a motor (not shown). The yarn pooling roller 38 winds the spun yarn 30 around its outer circumferential surface and temporarily stores the spun yarn 30. By rotating at a predetermined rotational speed with the spun yarn 30 wound around its outer circumferential surface, the yarn pooling roller 38 pulls out the spun yarn 30 from the air spinning device 23 located upstream at a predetermined speed and transports it downstream.

[0038] In this way, the yarn pooling device 25 can temporarily pool the spun yarn 30 on the outer peripheral surface of the yarn pooling roller 38, and therefore functions as a kind of buffer for the spun yarn 30. This can eliminate problems (such as slack in the spun yarn 30) caused by a mismatch between the spinning speed in the air spinning device 23 and the winding speed of the spun yarn 30 for some reason.

[0039] The winding device 27 includes a cradle arm 41, a winding drum 43, and a traverse guide 45. The cradle arm 41 is supported so as to be swingable about a support shaft, and can rotatably support a bobbin 47 for winding the spun yarn 30. The winding drum 43 rotates while in contact with the outer peripheral surface of the bobbin 47 or the package 49, thereby rotating the package 49 in the winding direction. The winding device 27 drives the winding drum 43 by an electric motor (not shown) while reciprocating the traverse guide 45 by a driving means (not shown). In this way, the winding device 27 traverses the spun yarn 30 and winds the spun yarn 30 onto the package 49.

[0040] As shown in FIG. 1 , rails are arranged on the frame 36 of the spinning machine 1 in the direction in which the multiple spinning units 7 are lined up. The yarn splicing cart 9 travels on the rails and can move relative to the multiple spinning units 7. A yarn splicing device 9a is provided on the yarn splicing cart 9. The yarn splicing cart 9 travels to the spinning unit 7 where a yarn breakage has occurred and performs a yarn splicing operation on that spinning unit 7 using the yarn splicing device 9a.

[0041] Next, a configuration for supplying compressed air and additives to each spinning unit 7 will be described with reference to Fig. 2. In the following description, "upstream" and "downstream" refer to upstream and downstream in the flow direction of the compressed air or additives.

[0042] The spinning machine 1 further includes a compressed air supply unit 70 and an adding unit 90. The compressed air supply unit 70 includes a first inlet pipe 71, a second inlet pipe 72, a branch pipe 75, a first spinning pipe (pipe) 76, a second spinning pipe 77, a first unit pipe 78, and a second unit pipe 79.

[0043] The first inlet pipe 71 is connected to an air supply source 81. The air supply source 81 is a known compressor. Compressed air sent out from the air supply source 81 flows through the first inlet pipe 71. A second inlet pipe 72 is connected to the downstream end of the first inlet pipe 71 via a first main valve 82 that can be switched between an open and closed state. The compressed air from the first inlet pipe 71 flows through the second inlet pipe 72.

[0044] A filter 83 and a regulator 84 are disposed in the second inlet pipe 72. The filter 83 separates particulate matter in the compressed air from the compressed air to purify the compressed air. The regulator 84 adjusts the pressure of the compressed air. The compressed air that has been purified by the filter 83 and whose pressure has been adjusted by the regulator 84 is supplied to each spinning unit 7.

[0045] A branch pipe 75 is connected to the downstream end of the second inlet pipe 72. The branch pipe 75 branches into two, each connected to a first spinning pipe 76 and a second spinning pipe 77. As a result, compressed air supplied from the air supply source 81 flows through the first spinning pipe 76 and the second spinning pipe 77, respectively. The first spinning pipe 76 and the second spinning pipe 77 each extend along the parallel direction of the spinning unit 7. In this embodiment, the compressed air supply unit 70 is located at the first end in the parallel direction of the spinning unit 7, and the first spinning pipe 76 and the second spinning pipe 77 extend toward the second end in the parallel direction. Compressed air flows toward the spinning unit 7 through the first spinning pipe 76 and the second spinning pipe 77.

[0046] In the direction of compressed air flow, a second main valve 85, which can be switched between open and closed states, is provided at the upstream end of the first spinning pipe 76. The second main valve 85 is located upstream of the connection point between the first spinning pipe 76 and the first unit pipe 78.

[0047] The first unit piping 78 is connected to the first spinning piping 76. One first unit piping 78 supplies compressed air from the first spinning piping 76 to one corresponding spinning unit 7. The first unit piping 78 is provided with a first supply valve 86 that can be switched between open and closed states. On the other hand, the second unit piping 79 is connected to the second spinning piping 77. One second unit piping 79 supplies compressed air from the second spinning piping 77 to one corresponding spinning unit 7. The second unit piping 79 is provided with a second supply valve 87 that can be switched between open and closed states. The relationship between unit piping and spinning units is not limited to a one-to-one relationship, but may be one-to-many.

[0048] In the first spinning piping 76, a mist-like additive is supplied from the additive section 90 to the section between the second main valve 85 and the upstream first unit piping 78. This mixes the mist-like additive with the compressed air distributed and supplied to each spinning unit 7 via the first spinning piping 76. On the other hand, no additive is supplied from the additive section 90 to the second spinning piping 77.

[0049] The additive supplied from the additive section 90 to the first spinning pipe 76 is, for example, a chemical agent containing a component that prevents the accumulation of oil in the pneumatic spinning apparatus 23. The additive is a liquid. In addition to or instead of the component that prevents the accumulation of oil, the chemical agent may also contain a chemical agent capable of imparting at least one of the following functions to the spun yarn 30: antibacterial, deodorizing, odor-preventing, waxing, etc.

[0050] The type of additive is determined appropriately in consideration of the needs required for the spun yarn 30. The operator puts an appropriate additive into the storage unit 93 depending on the raw material of the sliver used in the spinning machine 1.

[0051] In the following, the compressed air containing a mist-like additive supplied from the first spinning pipe 76 to each spinning unit 7 via the first unit pipe 78 may be referred to as "added air." The compressed air supplied from the second spinning pipe 77 to each spinning unit 7 via the second unit pipe 79 (compressed air without additives) may be referred to as "dry air."

[0052] When the spinning machine 1 is in operation, the first main valve 82 is in the open state. When spinning the fiber bundle 34 using added air, the second main valve 85 and the first supply valve 86 are also opened, and the second supply valve 87 is closed. On the other hand, when spinning the fiber bundle 34 using only dry air, the second main valve 85 and the first supply valve 86 are closed, and the second supply valve 87 is open. The switching of the open / closed state of each valve may be performed by the operator, the central control device 13, or the unit control unit.

[0053] Next, the additive section 90 will be described in detail with reference to Figure 2.

[0054] The additive unit 90 generates a mist-like additive and supplies it to the first spinning pipe 76. At least one additive unit 90 is provided in the spinning machine 1. One additive unit 90 may be provided for every predetermined number of spinning units 7. As shown in Figure 2, the additive unit 90 includes an inlet pipe 91, a pressure adjustment unit 92, a storage unit 93, and a connecting pipe 95.

[0055] The upstream end of the inlet pipe 91 is connected to the compressed air supply unit 70. More specifically, the upstream end of the inlet pipe 91 is connected to the second inlet pipe 72 (more specifically, the second inlet pipe 72, and between the filter 83 and the regulator 84). Compressed air from the second inlet pipe 72 flows through the inlet pipe 91. The pressure adjustment unit 92 is located in the inlet pipe 91. The pressure adjustment unit 92 adjusts the pressure of the compressed air. The pressure adjustment unit 92 is, for example, a pressure reducing valve.

[0056] The storage section 93 is a pressure vessel capable of storing additives. When compressed air is supplied to the storage section 93, a mist-like additive is generated by a mechanism described later. The connecting pipe 95 connects the additive section 90 to the first spinning pipe 76. The pressure adjustment section 92 is set so that the pressure of the additive air flowing through the connecting pipe 95 is greater than the pressure of the compressed air flowing through the first spinning pipe 76. As a result, the connecting pipe 95 sends (injects) the additive air generated in the additive section 90 into the first spinning pipe 76. Consequently, the additive air generated in the additive section 90 is mixed with the compressed air flowing through the first spinning pipe 76.

[0057] The added air generated in this way then flows further through the first spinning pipe 76 and is supplied to the spinning unit 7 via the first unit pipe 78. Specifically, it is supplied to the fiber bundle 34 from the spinning nozzle of the air spinning device 23 within the spinning unit 7. However, the added air may also be supplied to a location other than the air spinning device 23, for example, to the fiber bundle 34 being transported between the draft device 21 and the air spinning device 23.

[0058] Next, with reference to FIG. 3, a mechanism for generating a mist of additive using compressed air will be described.

[0059] As shown in FIG. 3 , the storage section 93 includes a first container section 51, a second container section 52, and a lid 53. The first container section 51 and the second container section 52 each include a storage space for storing an additive. The second container section 52 is a container-like section formed by extending a portion of the first container section 51 (specifically, a portion where the nozzle 60 and the like are disposed) downward. Specifically, the second container section 52 is connected to the lower side of the first container section 51, and is capable of transferring the additive from the first container section 51 to the second container section 52. A second bottom section 52a formed in the second container section 52 is positioned lower than a first bottom section 51a formed in the first container section 51. In a cross section cut along a plane perpendicular to the up-down direction, the cross-sectional area of ​​the effective volume section of the second container section 52 is smaller than the cross-sectional area of ​​the effective volume section of the first container section 51.

[0060] The lid 53 is provided on the upper surface of the first container portion 51. By attaching the lid 53, the first container portion 51 and the second container portion 52 can be sealed. When replenishing the additive, the operator removes the lid 53 from the storage portion 93 and supplies the additive to the storage portion 93 through the replenishing port to which the lid 53 was attached.

[0061] The additive section 90 includes an inlet section 54 and an outlet section 55 as mechanisms for intake and exhaust.

[0062] The introduction section 54 is a section that introduces compressed air into the storage section 93. In particular, in this specification, the section through which the compressed air flows that moves integrally with the storage section 93 is referred to as the introduction section 54. In other words, even when the storage section 93 is moved for maintenance or other reasons, the introduction section 54 moves together with the storage section 93. As a specific configuration, in the addition section 90 of this embodiment, the members that constitute the introduction section 54 are fixed to the storage section 93, and a coupler or the like that detachably connects the introduction section 54 and the inlet pipe 91 is provided. Note that another pipe may be provided between the introduction section 54 and the inlet pipe 91.

[0063] The introduction section 54 includes an introduction passage 54a and an internal check valve 54b. The introduction passage 54a is a passage through which compressed air supplied via the inlet pipe 91 flows. The internal check valve 54b is disposed in the introduction passage 54a. The internal check valve 54b allows fluid to pass downstream (towards a nozzle 60, which will be described later) and prevents fluid from passing upstream (towards the inlet pipe 91).

[0064] Providing the internal check valve 54b makes it possible to prevent compressed air from flowing from the storage portion 93 toward the air supply source 81 (i.e., backflow). For example, during maintenance, the air supply source 81 may be turned off, causing a drop in pressure on the air supply source 81 side, and even in such a case, the backflow of compressed air can be prevented. In particular, because the internal check valve 54b of this embodiment moves integrally with the storage portion 93, backflow of compressed air can be prevented even when the storage portion 93 is removed from the inlet piping 91 and moved, or when the introduction portion 54 is temporarily connected to another piping.

[0065] The discharge unit 55 is a part that discharges the mist of additive generated in the storage unit 93 to the outside of the storage unit 93. The mist of additive discharged by the discharge unit 55 is discharged to the first spinning pipe 76 via the connection pipe 95. In particular, in this specification, the part of the part through which the mist of additive flows that moves integrally with the storage unit 93 is referred to as the discharge unit 55. In other words, even when the storage unit 93 is moved for maintenance or other reasons, the discharge unit 55 moves together with the storage unit 93. As a specific configuration, in the addition unit 90 of this embodiment, the members that constitute the discharge unit 55 are fixed to the storage unit 93, and a coupler or the like that detachably connects the discharge unit 55 and the connection pipe 95 is provided. Note that another pipe may be provided between the discharge unit 55 and the connection pipe 95.

[0066] The discharge section 55 includes a discharge passage 55a and an external check valve 55b. The discharge passage 55a is a passage through which the mist of additive generated in the storage section 93 flows. The external check valve 55b is disposed in the discharge passage 55a. The external check valve 55b allows fluid to pass downstream (toward the connection pipe 95 and the first spinning pipe 76) and prevents fluid from passing upstream (toward the storage section 93).

[0067] By providing the external check valve 55b, it is possible to prevent the added air from flowing (i.e., flowing backward) from the connecting pipe 95 or the first spinning pipe 76 toward the storage section 93. For example, at the start of spinning, the pressure on the first spinning pipe 76 side may increase first, and even in such a situation, it is possible to prevent the added air from flowing backward. In particular, since the external check valve 55b in this embodiment moves integrally with the storage section 93, the parts related to the adding section 90 can be handled as a single unit.

[0068] The internal check valve 54b and the external check valve 55b being provided so as to move integrally with the storage portion 93 is just one example, and the internal check valve 54b and the external check valve 55b may be provided in piping or the like that is further away from the storage portion 93. Furthermore, the internal check valve 54b and the external check valve 55b are not essential components. For example, by accurately controlling the pressure upstream or downstream of the storage portion 93, these check valves may be omitted. Furthermore, the introduction passage 54a and the internal check valve 54b are not limited to being provided integrally with the storage portion 93. For example, an external piping may be connected to the opening of the storage portion 93.

[0069] The internal check valve 54b and the external check valve 55b of this embodiment have a normally open structure, which means that they are normally open and close when pressure or the like is applied. The internal check valve 54b and the external check valve 55b may also have a normally closed structure. Alternatively, one of the internal check valve 54b and the external check valve 55b may have a normally open structure and the other a normally closed structure. The internal check valve 54b and the external check valve 55b of this embodiment are spring-loaded. Alternatively, the internal check valve 54b and the external check valve 55b may be check valves of another type, such as a diaphragm type.

[0070] Furthermore, the additive unit 90 includes a nozzle 60, a first guide unit 61, a second guide unit 62, and a third guide unit 63 as a mechanism for generating a mist-like additive.

[0071] The nozzle 60 injects compressed air into the additive stored in the storage section 93 to generate a foam or mist of additive (hereinafter referred to as a floating additive). Specifically, the nozzle 60 is formed with an air passage 60a, an air chamber 60b, and an injection hole 60c.

[0072] The air passage 60a extends in the vertical direction. "Extending in the vertical direction" means that the longitudinal direction of the member (in this case, the air passage 60a) is approximately parallel to the vertical direction. The introduction passage 54a is connected to the upper end of the air passage 60a. In other words, compressed air flows downward in the air passage 60a. In this embodiment, the air passage 60a is located in the center of the storage section 93 in a plan view, but this is just one example. The air chamber 60b is connected to the lower end of the air passage 60a.

[0073] The air chamber 60b has a larger cross-sectional area when cut horizontally than the air passage 60a. The compressed air supplied through the air passage 60a is temporarily stored in the air chamber 60b and then injected from the injection holes 60c. Note that the air chamber 60b is not an essential component and can be omitted.

[0074] The injection hole 60c is formed on the upper surface of the air chamber 60b. In other words, the axial direction of the injection hole 60c is approximately parallel to the vertical direction. Compressed air is injected upward from the injection hole 60c. Here, the additive is present around the nozzle 60. Specifically, the injection hole 60c is located in the second container portion 52. In other words, the injection hole 60c is located below the first bottom portion 51a (further in other words, below the center in the height direction of the storage portion 93). Therefore, the injection hole 60c injects compressed air upward toward the additive present in the second container portion 52. As a result, the additive is foamed or misted around the outside of the injection hole 60c, generating floating additive.

[0075] The nozzle 60 is not limited to a configuration in which compressed air is supplied from the upper end, and compressed air may be supplied from another position. Therefore, one example is one in which the air passage 60a extends in the vertical direction. Furthermore, in order to move the suspended additive upward, it is preferable that the injection hole 60c faces upward, but it may face in a different direction.

[0076] The first guide portion 61 adjusts the state of the floating additive by restricting the path of the floating additive while moving the floating additive generated by the nozzle 60. Specifically, the first guide portion 61 is formed with a first guide passage 61a and a first opening 61b.

[0077] The first guide passage 61a extends in the vertical direction. A space is formed in the first guide passage 61a through which the floating additive generated by the nozzle 60 flows. Specifically, a first cylindrical member 56 is disposed outside the nozzle 60. The first guide passage 61a is formed by the inner peripheral surface of the first cylindrical member 56 and the outer peripheral surface of the air passage 60a. The first cylindrical member 56 is also formed with a first inlet hole (inlet hole) 56a for allowing the additive to flow into the first guide passage 61a. The first inlet hole 56a is formed so as to be located below the first bottom portion 51a and below the injection hole 60c.

[0078] The presence of the first guide passage 61a limits the size of bubbles in the foamy additive. This prevents excessive foamy additive from being generated. Furthermore, excessive amounts of foamy additive interact with each other and liquefy. Here, the first guide passage 61a of this embodiment guides the floating additive upward, allowing the liquefied additive to fall toward the storage section 93 below. Therefore, a route for returning the liquefied additive from the first guide passage 61a to the storage section 93 is not required.

[0079] The first opening 61b is an opening for discharging the additive in a floating state that has flowed along the first guide passage 61a. Since the first guide passage 61a is configured to guide the additive in a floating state upward, the first opening 61b is positioned above the air passage 60a. Even when passing through the first opening 61b, excessively large foam-like additives may not be able to pass through the first opening 61b and may liquefy. As described above, the first guide section 61 has the function of suppressing the generation of foam-like additives.

[0080] Specifically, the first opening 61b corresponds to a hole formed in the upper part and side surface of the first cylindrical member 56. In this manner, in this embodiment, the axial direction of the first opening 61b coincides with the radial direction. However, the axial direction of the first opening 61b may be the up-down direction or a direction inclined relative to the vertical or horizontal direction.

[0081] In this embodiment, the first opening 61b is formed not at the upper end of the first guide passage 61a but at a position slightly below the upper end. This makes it difficult for foamy additive that has moved to the upper end of the first opening 61b to exceed the first opening 61b, which may prevent the generation of foamy additive. Note that mist-like additive is easily transported downstream along the flow of compressed air. Alternatively, the first opening 61b may be formed at the upper end of the first guide passage 61a.

[0082] The second guide section 62 moves the suspended additive discharged by the first guide section 61 and further adjusts the state of the suspended additive by restricting its path. Specifically, the second guide section 62 has a second guide passage 62a and a second opening 62b.

[0083] The second guide passage 62a extends in the vertical direction. However, the vertical extension of the second guide passage 62a is just one example; for example, its radial and vertical lengths may be approximately the same. The second guide passage 62a forms a space through which the suspended additive discharged by the first guide section 61 flows.

[0084] The second opening 62b is an opening for discharging the suspended additive that has flowed along the second guide passage 62a. The second opening 62b is located below the first opening 61b. In other words, when the suspended additive moves from the first guide section 61 to the second guide section 62, the direction of movement of the suspended additive changes, and large foamy additives may accumulate and liquefy because they cannot adapt to the change in direction of movement.

[0085] The axial direction of the second opening 62b is approximately parallel to the vertical direction, allowing the suspended additive to be discharged downward. Since the liquid level of the additive is located below the second opening 62b, the liquefied additive can be returned to the storage section 93. The second opening 62b may also discharge the suspended additive in a different direction (for example, radially outward).

[0086] The third guide section 63 further adjusts the state of the floating additive by moving the floating additive discharged by the second guide section 62 and restricting its path. Note that the foamy additive is suppressed to some extent by the first guide section 61 and the second guide section 62, so the third guide section 63 can be omitted. The third guide section 63 has a third guide passage 63a and a third opening 63b formed therein.

[0087] The third guide passage 63a extends in the vertical direction. Specifically, the second cylindrical member 57 is disposed outside the first cylindrical member 56. The third guide passage 63a is formed by the inner peripheral surface of the second cylindrical member 57 and the outer peripheral surface of the first cylindrical member 56. A second inlet hole 57a for allowing the additive to flow is formed in the lower part of the second cylindrical member 57. The second cylindrical member 57 is a hole for allowing the additive to flow from the first container portion 51 to the second container portion 52. Note that the third guide passage 63a extending in the vertical direction is just an example, and for example, the radial and vertical lengths may be approximately the same. A space is formed in the third guide passage 63a through which the suspended additive discharged by the second guide portion 62 flows.

[0088] The third opening 63b is an opening for discharging the floating additive that has flowed along the third guide passage 63a. The third opening 63b is positioned above the second opening 62b. That is, when the floating additive moves from the second guide section 62 to the third guide section 63, the moving direction of the floating additive changes, and large foam-like additives may not be able to adapt to the change in moving direction and may remain and liquefy.

[0089] The axial direction of the third opening 63b is approximately parallel to the vertical direction, and the floating additive is discharged upward. The third opening 63b may also discharge the floating additive in another direction (for example, radially outward).

[0090] The floating additive discharged from the third opening 63b fills the space above the liquid level in the storage section 93. Here, in the conventional configuration, it is difficult to suppress the size and generation of foamy additive. As a result, this space may be filled with foamy additive, making it difficult to sufficiently discharge the mist-like additive. In contrast, in the present embodiment, the first guide section 61, the second guide section 62, and the third guide section 63 suppress the size and generation of foamy additive, so that foamy additive is less likely to be generated in the space above the liquid level in the storage section 93. As a result, the mist-like additive can be appropriately guided to the discharge section 55.

[0091] Next, we will explain matters related to the liquid level of the additive.

[0092] As the additive is supplied to the first spinning pipe 76, the additive is consumed. Therefore, an operator is required to replenish the additive. Here, when the liquid level of the additive falls below the first bottom 51a, the liquid level of the additive is above the nozzle 60, so compressed air can be injected into the additive to generate a suspended additive. In particular, in this embodiment, the cross-sectional area of ​​the effective volume portion of the second container portion 52 is smaller than the cross-sectional area of ​​the effective volume portion of the first container portion 51. Therefore, compared to when the cross-sectional area of ​​the effective volume portion is constant throughout (for example, compared to when a cylindrical container with a constant diameter is used), the addition unit 90 can continue to operate with a smaller amount of additive.

[0093] Furthermore, if the additive liquid level falls below the injection hole 60c, compressed air will no longer be injected onto the additive, making it impossible to supply the additive toward the first spinning pipe 76. Even if the additive liquid level is at the same level as or slightly above the injection hole 60c, sufficient suspended additive cannot be produced. Therefore, in practice, it is preferable to start issuing a notification or preparing for replenishment when the additive liquid level reaches the first bottom 51a. On the other hand, if the additive liquid level rises above the third opening 63b, the suspended additive cannot be discharged from the third opening 63b. Therefore, it is preferable that the additive liquid level be above the first bottom 51a and below the third opening 63b. Hereinafter, the height corresponding to the upper limit of the additive liquid level will be referred to as the upper limit liquid level, and the height corresponding to the lower limit of the additive liquid level will be referred to as the lower limit liquid level.

[0094] The additive unit 90 includes a float 66, a regulating member 67, an upper detection unit (detection unit) 68, and a lower detection unit (detection unit) 69 as components for detecting the liquid level of the additive.

[0095] The float 66 is made of a material with a specific gravity that allows it to float on the additive. The float 66 is arranged in an area covered by a regulating member 67 that suppresses horizontal movement. The upper detection unit 68 is arranged at a height that will contact the upper end of the float 66 when the additive reaches the upper limit liquid level or nearby. The upper detection unit 68 is a contact sensor and can detect that the float 66 has made contact. The lower detection unit 69 is arranged at a height that will contact the lower end of the float 66 when the additive reaches the lower limit liquid level or nearby. The lower detection unit 69 is a contact sensor and can detect that the float 66 has made contact. The upper detection unit 68 and the lower detection unit 69 are contact sensors, but this is just an example; at least one of them may be a different type of sensor. The different type of sensor may be, for example, an optical distance sensor. Alternatively, a magnet may be arranged at a predetermined position on the float 66, and a reed switch that detects magnetic force may be provided on the storage unit 93 side.

[0096] The detection results of the upper detector 68 and the lower detector 69 are transmitted to a control board (not shown). When the control board receives a detection result from the upper detector 68 or the lower detector 69 indicating that contact has been detected, it alerts the operator by sound, light, or the like. This makes it possible to notify the operator when it is time to replenish additives or that the amount of additive replenishment has reached a sufficient level. Note that the control board may execute an abnormal shutdown of the addition unit 90 instead of or in addition to alerting the operator.

[0097] The configuration for detecting and notifying the additive liquid level is not an essential component and can be omitted. Also, either the upper detection unit 68 or the lower detection unit 69 (for example, the upper detection unit 68) may be omitted. Also, detecting the upper limit liquid level and the lower limit liquid level using a detection unit is one example, and the detection unit may be disposed at a position for detecting other liquid levels, such as an appropriate liquid level or a liquid level that soon requires replenishment.

[0098] Next, the preferred number and size of the components constituting the additive portion 90 will be described.

[0099] First, the injection holes 60c will be described. As the diameter of the injection holes 60c increases, the size of the foamy additive bubbles generated per unit time increases. As the number of injection holes 60c increases, the number of foamy additives generated per unit time increases. However, if the diameter of the injection holes 60c is too small or too few, the amount of floating additive generated per unit time decreases. Therefore, it is preferable to keep the diameter and number of injection holes 60c within an appropriate range. Specifically, the diameter of the injection holes 60c is preferably 0.5 mm or more and 1 mm or less. Furthermore, it is preferable that the number of injection holes 60c formed be 4 or more and 12 or less.

[0100] Next, the first inlet holes 56a will be described. The diameter and number of the first inlet holes 56a affect the amount of additive that flows into the first guide portion 61 per unit time. If the amount of additive that flows in per unit time is too small, the amount of suspended additive generated is likely to be small. If the amount of additive that flows in per unit time is too large, the suspended additive that is generated may come into contact with the additive in the inflowing liquid and be absorbed. Therefore, it is preferable that the diameter and number of the first inlet holes 56a be within an appropriate range. Specifically, the diameter of the first inlet holes 56a is preferably 0.5 mm or more and 3 mm or less. Furthermore, it is preferable that the number of first inlet holes 56a formed be 2 or more and 8 or less.

[0101] Next, the first guide passage 61a will be described. If the flow path cross-sectional area of ​​the first guide passage 61a is large, the amount of floating additive that can pass through per unit time increases, but the size of the bubbles of the foamy additive tends to increase, and the additive is less likely to liquefy. Therefore, it is preferable to keep the flow path cross-sectional area of ​​the first guide passage 61a within an appropriate range. Specifically, it is preferable that the flow path cross-sectional area of ​​the first guide passage 61a be 100 mm or more and 3000 mm or less.

[0102] Next, the external check valve 55b will be described. If the flow path cross-sectional area of ​​the external check valve 55b is large, the amount of mist-like additive that can pass through per unit time increases, but liquefaction of the additive is unlikely to occur. Therefore, it is preferable that the flow path cross-sectional area of ​​the external check valve 55b be within an appropriate range. Specifically, it is preferable that the flow path cross-sectional area of ​​the external check valve 55b be 40 square mm or more and 1000 square mm or less.

[0103] As described above, the spinning machine 1 of this embodiment includes multiple spinning units 7, a first spinning pipe 76, and an adding section 90. The spinning units 7 produce and wind yarn. Compressed air flows through the first spinning pipe 76 toward the spinning units 7. The adding section 90 generates additive air containing an additive and supplies the additive air to the first spinning pipe 76. The adding section 90 includes a storage section 93, a nozzle 60, a first guide section 61, a second guide section 62, and a discharge section 55. The storage section 93 stores a liquid additive. The nozzle 60 has an ejection hole 60c formed therein. By supplying compressed air from the ejection hole 60c to the additive stored in the storage section 93, a floating additive, which is a foam-like or mist-like additive, is generated. The first guide portion 61 extends in the vertical direction, covers at least the injection hole 60c, and has a space formed therein through which the floating additive generated by the nozzle 60 flows, and discharges the floating additive from a first opening 61b located above the injection hole 60c. The second guide portion 62 has a space formed therein through which the floating additive discharged from the first opening 61b flows, and discharges the floating additive from a second opening 62b located below the first opening 61b. The discharge portion 55 discharges the mist of additive generated in the storage portion 93 to the outside of the storage portion 93.

[0104] By restricting the passage of the suspended additive using the first guide section 61 and the second guide section 62, it is possible to suppress the discharge of foamy additive and suppress the expansion of foam size. This makes it less likely for the transport of mist-like additive to be hindered.

[0105] In the spinning machine 1 of this embodiment, the addition section 90 has a space formed in which the floating additive discharged from the second opening 62b flows, and is equipped with a third guide section 63 that discharges the floating additive from a third opening 63b located above the second opening 62b.

[0106] This further suppresses the expansion of bubble size in foamy additives.

[0107] In the spinning machine 1 of this embodiment, the adding section 90 includes an introduction passage 54a and an internal check valve 54b. The introduction passage 54a moves integrally with the storage section 93, and compressed air flows toward the nozzle 60. The internal check valve 54b is disposed in the introduction passage 54a, and allows the passage of fluid toward the nozzle 60 while inhibiting the passage of fluid from the nozzle 60 toward the introduction passage 54a.

[0108] This makes it possible to prevent the additive from flowing from adding portion 90 to the compressed air supply side. Furthermore, because introduction passage 54a and internal check valve 54b move integrally with reservoir 93, backflow of fluid can be prevented even while the position of reservoir 93 is temporarily changed to perform maintenance or other work.

[0109] In the spinning machine 1 of this embodiment, the ejection holes 60c are formed in a direction that supplies compressed air upward. The diameter of the ejection holes 60c is 0.5 mm or more and 1 mm or less. The number of the ejection holes 60c formed is 4 or more and 12 or less.

[0110] By supplying compressed air upward, the floating additive tends to flow toward the first opening 61b, which is located above the injection holes. The diameter and number of injection holes 60c affect the state of the floating additive generated by the nozzle (for example, the size and amount of bubbles), and an appropriate state can be achieved by setting the diameter and number within the above range.

[0111] In the spinning machine 1 of this embodiment, the first guide section 61 has a first inlet hole 56a formed therein for introducing an additive into the first guide section 61. The diameter of the first inlet hole 56a is 0.5 mm or more and 3 mm or less. The number of first inlet holes 56a formed is 2 or more and 8 or less.

[0112] The diameter and number of the first inlet holes 56a affect the amount of additive flowing into the first guide section 61, and by setting them within the above range, an appropriate amount of additive can be introduced.

[0113] In the spinning machine 1 of this embodiment, the storage section 93 includes a first bottom 51a and a second bottom 52a located below the first bottom 51a. In a plan view, the nozzle 60 and the first guide section 61 overlap at least a portion of the second bottom 52a. The second container section 52, which is formed between the first bottom 51a and the second bottom 52a in the vertical direction, has a smaller cross-sectional area of ​​its effective volume when cut along a plane perpendicular to the vertical direction than the first container section 51, which is formed above the first bottom 51a. The injection hole 60c is located below the first bottom 51a.

[0114] As a result, even when the water level of the additive falls below the first bottom 51a, the additive section 90 can generate added air with only a relatively small amount of additive remaining.

[0115] In the spinning machine 1 of this embodiment, the flow path cross-sectional area of ​​the first guide section 61 is equal to or greater than 100 square mm and equal to or less than 3000 square mm.

[0116] The cross-sectional area of ​​the first guide section 61 affects the ease with which the suspended additive liquefies and the size of the bubbles, and setting it within the above range allows for the achievement of an appropriate state.

[0117] In the spinning machine 1 of this embodiment, the storage section 93 includes a float 66 and a detection section (upper detection section 68, lower detection section 69). The float 66 floats in the additive. The detection section detects the position of the float 66 in the vertical direction.

[0118] This allows the remaining amount of additive to be detected.

[0119] In the spinning machine 1 of this embodiment, the discharge section 55 includes a discharge passage 55a and an external check valve 55b. The discharge passage 55a moves integrally with the storage section 93, and a mist of additive flows from the discharge section 55 toward the first spinning pipe 76. The external check valve 55b is disposed in the discharge passage 55a, and allows the fluid toward the first spinning pipe 76 to pass through, while inhibiting the passage of the fluid from the first spinning pipe 76 toward the discharge section 55.

[0120] This makes it possible to prevent the additive from flowing back from the first spinning pipe 76 toward the adding section 90. Furthermore, since the discharge passage 55a and the external check valve 55b move integrally with the storage section 93, handling becomes easier.

[0121] In the spinning machine 1 of this embodiment, the flow path cross-sectional area of ​​the external check valve 55b is 40 square mm or more and 1000 square mm or less.

[0122] This makes it possible to make it difficult for mist-like additive particles to collide with each other and become liquefied.

[0123] The preferred embodiment of the present invention has been described above, but the above configuration can be modified, for example, as follows. Each modification may be made alone, or multiple modifications may be made in any combination.

[0124] In the above embodiment, the spinning machine 1 includes the first spinning pipe 76 for the additional air and the second spinning pipe 77 for the dry air. Alternatively, the second spinning pipe 77 may be omitted from the spinning machine 1.

[0125] In the above embodiment, the compressed air supplied to the first spinning pipe 76 and the compressed air used in the adding section 90 are generated by a common air supply source 81. Alternatively, the compressed air may be generated by separate air supply sources 81.

[0126] In the above embodiment, the first guide portion 61, the second guide portion 62, and the third guide portion 63 are each configured by a combination of multiple cylindrical members. Alternatively, the first guide portion 61, the second guide portion 62, and the third guide portion 63 may each be configured by an individual member. [Explanation of symbols]

[0127] 1. Spinning machine 7 Spinning Unit 60 nozzles 61 1st Information Department 62 2nd Information Department 63 3rd Information Department 76 No. 1 spinning piping (piping) 90 Addition part 93 Storage section

Claims

1. a plurality of spinning units for producing and winding yarn; a pipe through which compressed air flows toward the spinning unit; an adding unit that generates additive air containing an additive and supplies the additive air to the piping; Equipped with The adding section a reservoir for storing the liquid additive; a nozzle having an injection hole formed therein, which supplies compressed air from the injection hole to the additive stored in the storage section to generate a floating additive, which is the additive in a foam or mist state; a first guide portion extending in a vertical direction, covering at least the injection hole, forming a space through which the floating additive generated by the nozzle flows, and discharging the floating additive from a first opening located above the injection hole; a second guide portion that forms a space through which the floating additive discharged from the first opening flows and that discharges the floating additive from a second opening located below the first opening; a discharge section that discharges the additive in a mist form generated in the storage section to the outside of the storage section; A spinning machine comprising:

2. The spinning machine according to claim 1, The addition section is characterized in that a space is formed in which the floating additive discharged from the second opening flows, and the addition section is provided with a third guide section that discharges the floating additive from a third opening located above the second opening.

3. The spinning machine according to claim 1 or 2, The adding section an introduction passage that moves integrally with the storage portion and through which compressed air flows toward the nozzle; an internal check valve disposed in the introduction passage, allowing fluid to pass toward the nozzle and inhibiting fluid from passing from the nozzle toward the introduction passage; A spinning machine comprising:

4. A spinning machine according to any one of claims 1 to 3, The injection hole is formed in a direction to supply compressed air upward, The diameter of the injection hole is 0.5 mm or more and 1 mm or less, A spinning machine characterized in that the number of the injection holes formed is 4 or more and 12 or less.

5. A spinning machine according to any one of claims 1 to 4, an inlet hole for allowing the additive to flow into the first guide portion is formed in the first guide portion; The diameter of the inlet hole is 0.5 mm or more and 3 mm or less, A spinning machine characterized in that the number of the inlet holes formed is 2 or more and 8 or less.

6. A spinning machine according to any one of claims 1 to 5, The storage section includes a first bottom and a second bottom located below the first bottom, In a plan view, the nozzle and the first guide portion overlap with at least a portion of the second bottom portion, a second container portion formed between the first bottom portion and the second bottom portion in the vertical direction has a smaller cross-sectional area of ​​an effective volume portion when cut along a plane perpendicular to the vertical direction than a first container portion formed above the first bottom portion; The spinning machine, wherein the injection hole is located below the first bottom portion.

7. A spinning machine according to any one of claims 1 to 6, A spinning machine, wherein the first guide portion has a flow path cross-sectional area of ​​100 square mm or more and 3000 square mm or less.

8. A spinning machine according to any one of claims 1 to 7, The storage section is A float that floats on the additive; a detection unit that detects the position of the flotation device in the vertical direction; A spinning machine comprising:

9. A spinning machine according to any one of claims 1 to 8, The discharge section is a discharge passage that moves integrally with the storage portion and through which the additive in a mist form flows from the discharge portion toward the piping; an external check valve disposed in the discharge passage, allowing the fluid to pass toward the pipe and preventing the fluid from passing from the pipe toward the discharge portion; A spinning machine comprising:

10. The spinning machine according to claim 9, A spinning machine characterized in that the flow path cross-sectional area of ​​the external check valve is 40 square mm or more and 1000 square mm or less.

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