Fibrous waste recovery device and false twist processing machine

Abstract

The invention provides a fiber flock recovery device and a false twist processing machine capable of suppressing emission noise which may be generated due to air emission. The fiber tow recovery device is provided with: a fiber tow transfer pipe (11) for transferring fiber tow containing waste yarn together with air; a fiber tow recovery unit that recovers fiber tow transferred in the pipe of the fiber tow transfer pipe (11); a cyclone separator (30) that is provided between the fiber-tow transfer pipe (11) and the fiber-tow recovery unit, separates the fiber tow transferred in the pipe of the fiber-tow transfer pipe (11) from air, and recovers the fiber tow separated from the air into the fiber-tow recovery unit; and an emission sound suppressor (60) that suppresses emission sound that may be generated by discharging the air from which the fiber scraps have been separated by the cyclone separator (30).

Description

Technical Field

[0001] The present invention relates to a fiber waste recycling device for recycling fiber waste separated from air, and a false twisting machine including the fiber waste recycling device. Background Art

[0002] In fiber machines such as false twisting machines or spinning devices, fibers are continuously supplied even when fibers are hooked on the fiber machine or when a package formed by winding fibers with a winding device provided in the fiber machine is replaced. Therefore, in fiber machines, fiber waste has conventionally been sucked and recovered during thread hanging or package replacement.

[0003] For example, Patent Document 1 discloses a suction device for a plurality of continuously traveling silk threads, including a straw provided with a plurality of suction ports, a fiber waste collection container connected to an end of the straw, and a negative pressure pump or a suction blower connected to the fiber waste collection container. In the suction device disclosed in Patent Document 1, due to the operation of the negative pressure pump or the suction blower, the inside of the straw becomes negative pressure, and fiber waste sucked into the straw from the plurality of suction ports is attracted in the straw and recovered in the fiber waste collection container.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent Laid-Open No. 6-40661 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] In the suction device disclosed in Patent Document 1, due to the operation of the negative pressure pump or the suction blower connected via the fiber waste collection container on the downstream end side in the suction direction of the straw, fiber waste is attracted in the straw and recovered. According to such a suction device, there is a possibility that not only fiber waste but also air is discharged to the outside, and noise caused by the discharge sound that may be generated due to the discharged air becomes a problem.

[0009] The present invention has been made in view of the above problems, and an object thereof is to provide a fiber waste recycling device and a false twisting machine that can appropriately separate fiber waste from air and can suppress discharge sound that may be generated due to the discharged air.

[0010] Means for Solving the Problems

[0011] (1) The fiber waste recycling device of the present invention is characterized by including:

[0012] a fiber waste transfer pipe for transferring fiber waste including waste yarn together with air;

[0013] A fiber debris recovery section that recovers fiber debris transferred inside the pipe of the above-mentioned fiber debris transfer pipe; and

[0014] A cyclone separator is provided between the above-mentioned fiber debris transfer pipe and the above-mentioned fiber debris recovery section, separates the above-mentioned fiber debris transferred inside the pipe of the above-mentioned fiber debris transfer pipe from the air, and recovers the above-mentioned fiber debris separated from the air into the above-mentioned fiber debris recovery section,

[0015] The above-mentioned cyclone separator has:

[0016] A separation section that separates the above-mentioned fiber debris from the air; and

[0017] An exhaust sound suppressor that suppresses the exhaust sound that may be generated due to the discharge of the air from which the above-mentioned fiber debris has been separated by the above-mentioned separation section.

[0018] According to the fiber debris recovery device described in the above (1), it is possible to suppress the exhaust sound that may be generated due to the air from which the fiber debris has been separated by the separation section.

[0019] (2) In the fiber debris recovery device of the present invention, preferably, the above-mentioned exhaust sound suppressor is cylindrical and has a deceleration section that decelerates the speed of the air flowing toward the opening at one end on the side opposite to the above-mentioned separation section along the direction of air flow.

[0020] According to the fiber debris recovery device described in the above (2), the air flow velocity is decelerated along the direction of air flow toward the opening at one end on the side opposite to the separation section, so the exhaust sound can be suppressed.

[0021] In addition, if the exhaust sound suppressor is, for example, a linear or conical cylinder, the air flow velocity along the axial direction of the cylinder can be decelerated. Furthermore, if the exhaust sound suppressor is, for example, a cylinder with a curved portion, the air flow velocity along the shape of the cylinder is decelerated.

[0022] (3) In the fiber debris recovery device of the present invention, preferably, the above-mentioned deceleration section includes an obstruction section that obstructs the air flow toward the opening at the above-mentioned one end.

[0023] According to the fiber debris recovery device described in the above (3), the air flow is obstructed along the direction of air flow toward the opening at one end, so the exhaust sound can be suppressed.

[0024] (4) In the fiber debris recovery device of the present invention, preferably, the above-mentioned deceleration section includes a retention section that retains a part of the air flowing toward the opening at the above-mentioned one end inside the above-mentioned exhaust sound suppressor.

[0025] According to the fiber debris recovery device described in the above (4), by allowing a part of the air to stay in the discharge sound suppressor, it is possible to decelerate the flow velocity of the air flowing inside the discharge sound suppressor without a complicated mechanism, and thus it is possible to suppress the discharge sound.

[0026] (5) In the fiber debris recovery device of the present invention, preferably,

[0027] The above discharge sound suppressor has an inner wall surface, and the cross-section of the inner wall surface orthogonal to the direction in which the air flows toward the opening at one end is larger than the air discharge port through which the air is discharged from the separation part.

[0028] The above deceleration part is provided on the inner wall surface.

[0029] According to the fiber debris recovery device described in the above (5), in terms of the cross-section orthogonal to the direction in which the air flows toward the opening at one end, the inner wall surface is larger than the air discharge port. Therefore, it is possible to ensure the air passage of the air flowing in the discharge sound suppressor and decelerate the flow velocity of the air flowing toward the opening at one end. In particular, if the ratio of the flow rate of the air discharged from the separation part to the fiber debris recovery part to the flow rate of the air discharged from the air discharge port after the fiber debris is separated by the separation part becomes large, the separation of the fiber debris and the air in the separation part cannot be performed well. However, by making the inner wall surface of the discharge sound suppressor larger than the air discharge port, the air passage of the air is ensured, so the separation of the fiber debris and the air in the separation part can also be performed well. In addition, by providing the deceleration part on the inner wall surface, there is no need for additional components for setting the deceleration part, and an increase in the number of parts can be prevented.

[0030] (6) In the fiber debris recovery device of the present invention, preferably,

[0031] The above discharge sound suppressor is configured such that the opening area of the opening at one end is the same as or larger than the opening area of the air discharge port.

[0032] According to the fiber debris recovery device described in the above (6), since the opening area of the opening at one end is the same as or larger than the opening area of the air discharge port, it is possible to decelerate the flow velocity of the air flowing in the discharge sound suppressor.

[0033] (7) In the fiber debris recovery device of the present invention, preferably, the above discharge sound suppressor is in a linear or conical cylindrical shape.

[0034] According to the fiber debris recovery device described in the above (7), since the air is discharged straight from the air discharge port to the opening at one end, it is possible to ensure the air passage of the air flowing toward the outside and decelerate the air flowing toward the outside.

[0035] (8) In the fiber debris recovery device of the present invention, preferably,

[0036] The cyclone separator further has a fiber debris discharge part, which discharges the fiber debris that moves downward along the inner peripheral wall of the separation part and the air into the fiber debris recovery part together.

[0037] The discharge sound suppressor has a shielding member, which shields the waste yarn that does not discharge from the fiber debris discharge part and faces the opening part, so that the waste yarn does not discharge to the outside through the opening part.

[0038] According to the fiber debris recovery device described in the above (8), it is possible to suppress the exhaust sound that may be generated by the air flowing toward the outside, and it is possible to suppress the fiber debris that does not ride on the air flow moving downward along the inner peripheral wall of the separation part from discharging to the outside through the opening part.

[0039] (9) In the fiber debris recovery device of the present invention, preferably,

[0040] The discharge sound suppressor suppresses the discharge sound by 5 dB or more.

[0041] According to the fiber debris recovery device described in the above (9), it is possible to suppress the noise generated by the discharge sound.

[0042] The fiber debris recovery device of the present invention may be composed only of the components described in the fiber debris recovery device described in the above (1). Within the range where integration can be achieved, the components described in the above (1) and any one of the components described in the above (2) to (9) can also be arbitrarily combined to form the fiber debris recovery device of the present invention. When combining the components described in the above (1) and any one of the components described in the above (2) to (9), within the range where integration can be achieved, all or part of the components described in the above (1) and all or part of the components described in the above (2) to (9) can also be combined.

[0043] (10) The false-twist processing machine of the present invention includes the fiber debris recovery device described in any one of the above (1) to (9).

[0044] According to the false-twist processing machine described in the above (10), it is possible to suppress the discharge sound that may be generated by the air from which the fiber debris has been separated by the cyclone separator.

[0045] Advantages of the Invention

[0046] According to the present invention, it is possible to provide a fiber debris recovery device and a false-twist processing machine, which can appropriately separate fiber debris from air and can suppress the discharge sound that may be generated by discharging air. Brief Description of the Drawings

[0047] Figure 1 It is a schematic diagram showing an example of a false-twist processing machine as a fiber machine equipped with a fiber debris recovery device.

[0048] Figure 2 It is a schematic diagram showing an example of a fiber debris recovery device according to an embodiment of the present invention.

[0049] Figure 3 It is a cross-sectional view showing an example of the suction part provided in the fiber debris transfer pipe.

[0050] Figure 4 It is a perspective view showing an example of a cyclone separator.

[0051] Figure 5 It is a top view showing an example of a cyclone separator.

[0052] Figure 6 It is a front view showing an example of a cyclone separator.

[0053] Figure 7 It is a perspective view showing an example of a cyclone separator for explaining an exhaust sound suppressor.

[0054] Figure 8 It is a diagram for explaining an exhaust sound suppressor.

[0055] Figure 9 It is a diagram for explaining the principle of suppressing exhaust sound.

[0056] Figure 10 It is an example of the front view of a cyclone separator.

[0057] Figure 11 It is an example of the experimental result showing the relationship between the cone angle, the air flow rate in the air discharge part, and the air flow rate in the fiber debris discharge part.

[0058] Figure 12 It is a top view of a cyclone separator and is an example of a top view showing the change in the opening ratio of the gap of the shielding member.

[0059] Figure 13 It is an example of the experimental result showing the relationship between the air flow rate in the air discharge part and the air flow rate in the fiber debris discharge part.

[0060] Figure 14 It is a schematic diagram showing an example of the fiber debris recovery device of the first modification.

[0061] Figure 15 It is a schematic diagram showing an example of the fiber debris recovery device of the second modification.

[0062] Figure 16 It is a top view of the cyclone separator of the third modification.

[0063] Figure 17 It is a perspective view of the cyclone separator of the fourth modified example.

[0064] Figure 18 It is a view showing the exhaust sound suppressor of the fifth modified example.

[0065] Figure 19 It is a view showing the exhaust sound suppressor of the fifth modified example.

[0066] Figure 20 It is a view showing the exhaust sound suppressor of the fifth modified example.

[0067] Figure 21 It is a view showing the exhaust sound suppressor of the fifth modified example.

[0068] Figure 22 It is a view showing the results of the test conducted to confirm the suppression of the exhaust sound by the exhaust sound suppressor.

[0069] Symbol Explanation:

[0070] 1: Fiber debris recovery device; 11: Fiber debris transfer pipe; 13: Fiber debris recovery container; 15: Suction part; 30: Cyclone separator; 32: Main body part; 42: Conical part; 44: Inclined part; 46: Fiber debris discharge part; 50: Air discharge part; 52: Opening area; 60: Exhaust sound suppressor; 62: Outer fitting member; 64: Shielding member; 65: Deceleration part; 66: Gap; 651: Pleated member; Y: Fiber. Detailed Embodiment

[0071] Hereinafter, a mode for implementing the present invention will be described with reference to the drawings. In addition, in the following description, a case where the fiber debris recovery device of the present invention is provided in a fiber machine such as a false twisting machine will be described.

[0072] [False Twisting Machine]

[0073] Figure 1 It is a schematic diagram of the false twisting machine 101. In addition, for ease of explanation, the up-down direction, front-back direction, and left-right direction of the false twisting machine 101 are as Figure 1 shown.

[0074] The false twisting machine 101 is configured, for example, as a fiber machine that applies false twisting to a thermoplastic synthetic fiber such as polyester or polyamide to impart crimps to produce a stretchable processed yarn. The false twisting machine 101 includes a main body 102, a supply bobbin 104, a false twisting device 106, and a winding device 107.

[0075] The main body 102 is arranged to extend in the vertical direction. The yarn supply bobbin 104 is arranged opposite to the main body 102 with the working space 103 therebetween. The false-twist device 106 is arranged above the main body 102. The false-twist device 106 false-twists the fiber Y as the yarn supplied from the yarn supply bobbin 104. The winding device 107 is provided on the main body 102 and winds the fiber Y false-twisted by the false-twist device 106.

[0076] The winding device 107 is provided with four layers in the vertical direction. Further, a plurality of the winding devices 107 are arranged side by side in the front-rear direction in each of the four layers from the first layer to the fourth layer. In addition, in each of the four layers arranged in the vertical direction, the front-rear direction in which the plurality of winding devices 107 are arranged is a direction along the horizontal direction and is a direction perpendicular to the direction (left-right direction) in which the yarn supply bobbin 104 and the main body 102 are arranged.

[0077] In the yarn passage from the yarn supply bobbin 104 to the false-twist device 106, the first yarn supply roller 108, the yarn transfer guide 109, the first heating device 110, and the cooling device 111 are arranged in sequence from the upstream side in the yarn traveling direction. In addition, in the yarn passage from the false-twist device 106 to the winding device 107, the second yarn supply roller 112, the interlacing nozzle 113, the second heating device 114, the third yarn supply roller 115, and the oiling roller 116 are arranged in sequence from the upstream side in the yarn traveling direction.

[0078] The first yarn supply roller 108 is arranged above the working space 103. The first heating device 110 is arranged above the working space 103 and at a position higher than the first yarn supply roller 108. The cooling device 111 is arranged at a position closer to the main body 102 than the first heating device 110 above the working space 103. And the first heating device 110 and the cooling device 111 are arranged above the working space 103 so as to extend away from the main body 102 and obliquely upward. The yarn transfer guide 109 is arranged between the first yarn supply roller 108 and the first heating device 110 in the vertical direction and is used to allow the fiber Y to pass through the first heating device 110 and the cooling device 111 when the yarn is hooked on the false-twisting machine 101.

[0079] The second yarn supply roller 112 is arranged above the main body 102. The interlacing nozzle 113 is arranged above the main body 102 and at a position lower than the second yarn supply roller 112. The second heating device 114 is provided on the main body 102 and, when viewed from the working space 103, is arranged inside the winding device 107 and extends in the vertical direction from the first layer to the fourth layer of the four-layer winding device 107. By arranging each device in this way, the yarn passage from the yarn supply bobbin 104 to the winding device 107 is formed to surround the working space 103.

[0080] In the false-twist processing machine 101, the fiber Y as a silk thread fed from the supply bobbin 104 is conveyed to the above-described respective devices and wound around the winding device 107, thereby forming a package 117. First, the first to third supply rollers (108, 112, 115) are rollers for conveying the fiber Y from the upstream side to the downstream side in the traveling direction of the silk thread, and the silk thread conveyance speeds are set such that the silk thread conveyance speed of the second supply roller 112 is faster than the silk thread conveyance speed of the first supply roller 108. Therefore, the fiber Y is stretched between the first supply roller 108 and the second supply roller 112. In addition, the silk thread conveyance speeds are set such that the silk thread conveyance speed of the third supply roller 115 is faster than the silk thread conveyance speed of the second supply roller 112. Therefore, the fiber Y is relaxed between the second supply roller 112 and the third supply roller 115.

[0081] Then, the fiber Y stretched between the first supply roller 108 and the second supply roller 112 is twisted and conveyed, for example, by a friction disk type doubling machine, i.e., the false-twist device 106. The twist formed by the false-twist device 106 is propagated to the first supply roller 108, and the fiber Y stretched and twisted is heated by the first heating device 110 and then cooled by the cooling device 111, and the twist is fixed. The fiber Y twisted and heat-set is untwisted to the second supply roller 112 after passing through the false-twist device 106.

[0082] The fiber Y thus stretch-false-twist processed appropriately forms a cross-over portion in the interlacing nozzle 113, and after imparting bundling property, it is subjected to relaxation heat treatment in the second heating device 114, and is wound around a paper tube by the winding device 107 via the oiling roller 116 to form a package 117. Then, the package 117 in the full-wound state is unloaded from the winding device 107 by an operator. Then, a new paper tube is installed on the winding device 107 by the operator, and the winding operation onto the paper tube is restarted. In this way, the replacement of the package 117 is performed. The fiber debris recovery device of the present embodiment is provided for use in the above-described false-twist processing machine 101. Hereinafter, the fiber debris recovery device of the present embodiment will be described.

[0083] [Outline of Fiber Debris Recovery Device]

[0084] Figure 2This is a schematic diagram showing an example of the fiber waste recycling device 1 according to an embodiment of the present invention. The fiber waste recycling device 1 mainly includes, for example, a plurality of fiber waste transfer pipes 11 (11a to 11d), one fiber waste recycling container 13 provided relative to the plurality of fiber waste transfer pipes 11 (11a to 11d), and a plurality of cyclone separators 30 each provided corresponding to the plurality of fiber waste transfer pipes 11 (11a to 11d). The plurality of cyclone separators 30 are arranged between the fiber waste transfer pipes 11 (11a to 11d) and the fiber waste recycling container 13. The cyclone separator 30 separates fiber waste from the air transferred in the pipe of the fiber waste transfer pipe 11 and recovers the separated fiber waste into the fiber waste recycling container. The detailed content will be described later. In addition, the above "fiber waste" includes thread flyings, and in addition to relatively short fiber waste, it also includes fiber waste formed by aggregation of relatively short fiber waste and relatively long waste yarns, etc. Further, the above "fiber waste recycling container 13" corresponds to the "fiber waste recycling section" of the present invention.

[0085] The plurality of fiber waste transfer pipes 11 of the fiber waste recycling device 1 are arranged corresponding to each layer of the winding devices 107 arranged in the vertical direction, for example, in 4 layers, in the false twisting machine 101. Therefore, in the fiber waste recycling device 1 of the present embodiment having 4 layers of winding devices 107, 4 fiber waste transfer pipes 11 (11a to 11d) are provided. Each fiber waste transfer pipe 11 (11a to 11d) is arranged to extend in the front-rear direction. In each layer of the winding devices 107 from the first layer to the fourth layer, the winding devices 107 are arranged in the front-rear direction, and each fiber waste transfer pipe 11 (11a to 11d) is also arranged to extend in the front-rear direction in which the winding devices 107 are arranged. Each fiber waste transfer pipe 11 (11a to 11d) sucks the fiber Y (refer to Figure 1 ) from the vicinity of each winding device 107 arranged in the front-rear direction in each layer of the winding devices 107 arranged in 4 layers in the vertical direction, and transfers the fiber Y together with the air. The 4 fiber waste transfer pipes 11 (11a to 11d) are respectively connected to a common fiber waste recycling container 13. Then, the air containing the fiber Y transferred in the pipe of each fiber waste transfer pipe 11 (11a to 11d) is separated in the cyclone separator 30 into fiber waste as the fiber Y and clean air after the fiber waste is separated. The fiber waste separated from the air is recovered by the fiber waste recycling container 13. The clean air after the fiber waste is separated is discharged to the outside from the air discharge section 50 (refer to Figure 4 ) described later.

[0086] However, by providing the cyclone separator 30, the air after the fiber waste is separated is discharged from the air discharge section 50 (refer to Figure 4)It is discharged to the outside, whereby the number of fiber debris recovery containers 13 can be made smaller than the number of fiber debris transfer pipes 11 (11a to 11d), and the entire fiber debris recovery device 1 can be made compact. That is, by providing the cyclone separator 30, the fiber debris can be discharged in a lump, so that the volume occupied by the fiber debris inside the fiber debris recovery container 13 can be suppressed. In addition, the fiber debris is separated from the air, and the air after the fiber debris is separated is discharged from the air discharge portion 50. Thus, compared with the conventional fiber debris recovery device in which a blower or the like is connected to the fiber debris transfer pipe 11 (11a to 11d) and the air cannot be separated, the volume occupied by the air can be suppressed. As a result, in the fiber debris recovery device 1 of the present embodiment, compared with the conventional fiber debris recovery device, more fiber debris can be stored in the fiber debris recovery container 13, and the number of fiber debris recovery containers 13 can be suppressed. In addition, if the number of fiber debris recovery containers 13 is small, the replacement frequency and the like can also be reduced, and the burden on the operator can be alleviated. In addition, in the present embodiment, one fiber debris recovery container 13 is provided for all of the plurality of fiber debris transfer pipes 11 (11a to 11d), but it is not limited thereto. The number of fiber debris recovery containers 13 only needs to be smaller than the number of fiber debris transfer pipes 11 (11a to 11d).

[0087] In addition, the fiber debris recovery device 1 stores the silk thread without cutting it when switching the silk thread in the take-up device 107 of the false-twist processing machine 101, and recovers the silk thread as fiber debris. That is, as Figure 1 shown, the fiber debris recovery device 1 is used to recover the fiber Y continuously supplied from the supply bobbin 104 to the vicinity of the take-up device 107 via various devices (110, 111, 106, 114) etc. as fiber debris from the suction portion when the fiber Y is hooked on the false-twist processing machine 101 or when replacing the package 117 formed by the take-up device 107 of the false-twist processing machine 101. By doing so, when replacing the package 117 in the take-up device 107 of the false-twist processing machine 101, the fiber Y continuously supplied to the vicinity of the take-up device 107 can be recovered, so that it is not necessary to cut the silk thread, and the operation of the false-twist processing machine 101 can be continued. Hereinafter, the details of the configuration of the fiber debris recovery device 1 will be described in more detail.

[0088] [Fiber debris transfer pipe]

[0089] Referring to Figure 2 , the fiber debris transfer pipe 11 (11a to 11d) is configured as a pipe for sucking the fiber Y (refer to Figure 1) A plurality of suction parts 15 are arranged near each winding device 107 to transfer the fibers Y sucked from the plurality of suction parts 15. In addition, the suction part 15 for sucking the fibers Y will be described later. The fiber waste transfer pipe 11 is, for example, arranged in a hollow cylindrical shape. A plurality of fiber waste transfer pipes 11 (11a to 11d) are provided. In the present embodiment, as described above, four are provided.

[0090] As the four fiber waste transfer pipes 11 (11a to 11d), there are provided a first fiber waste transfer pipe 11a corresponding to the winding device 107 of the lowermost first layer, a second fiber waste transfer pipe 11b corresponding to the winding device 107 of the second layer from the bottom, a third fiber waste transfer pipe 11c corresponding to the winding device 107 of the third layer from the bottom, and a fourth fiber waste transfer pipe 11d corresponding to the winding device 107 of the uppermost fourth layer. Each fiber waste transfer pipe 11 (11a to 11d) is arranged in the false twisting machine 101 in a state where it extends in the front-rear direction along its length direction. Further, the first to fourth fiber waste transfer pipes (11a to 11d) are respectively arranged to extend in the front-rear direction at positions corresponding to each layer of the winding devices 107 from the first layer to the fourth layer. In addition, in the present embodiment, the cyclone separator 30 includes: a first cyclone separator 30a provided between the first fiber waste transfer pipe 11a and the fiber waste recovery container 13; a second cyclone separator 30b provided between the second fiber waste transfer pipe 11b and the fiber waste recovery container 13; a third cyclone separator 30c provided between the third fiber waste transfer pipe 11c and the fiber waste recovery container 13; and a fourth cyclone separator 30d provided between the fourth fiber waste transfer pipe 11d and the fiber waste recovery container 13.

[0091] One end ( Figure 2 the rear end shown) of each fiber waste transfer pipe 11 (11a to 11d) in the length direction extending in the front-rear direction is closed, and the other end ( Figure 2 the front end shown) is connected to the cyclone separator 30.

[0092] [Suction part]

[0093] Refer to Figure 2 , the suction part 15 is arranged as a mechanism for sucking the fibers Y (refer to Figure 1 ), and a plurality of them are provided in each fiber waste transfer pipe 11 (11a to 11d). The plurality of suction parts 15 provided in each fiber waste transfer pipe 11 are configured to include a suction pipe 16 and an opening / closing mechanism 17 (refer to Figure 3), are arranged along the length direction in the fiber waste transfer pipes 11 (11a to 11d). A plurality of suction portions 15 arranged in each of the fiber waste transfer pipes 11 (11a to 11d) are provided at positions corresponding to the winding device 107 in each of the fiber waste transfer pipes 11 (11a to 11d). More specifically, the plurality of suction portions 15 are respectively provided in each of the fiber waste transfer pipes 11 (11a to 11d) at positions corresponding to the winding devices 107 arranged in the front-rear direction in each layer of the winding device 107 arranged in, for example, 4 layers vertically in the false-twist processing machine 101 (refer to Figure 1 ). Figure 1 ).

[0094] The suction portions 15 provided in the first to fourth fiber waste transfer pipes 11 (11a to 11d) are all configured in the same manner. In addition, the plurality of suction portions 15 arranged in each of the fiber waste transfer pipes 11 (11a to 11d) are all configured in the same manner.

[0095] The suction pipe 16 is provided as a tubular member for sucking the fiber Y (refer to Figure 1 ), has a smaller diameter than the fiber waste transfer pipes 11 (11a to 11d), and is provided to bend and extend midway. One end side of the suction pipe 16 communicates with the fiber waste transfer pipes 11 (11a to 11d), and a suction port 16a (refer to Figure 1 ) for sucking the fiber Y is provided on the other end side in the vicinity of the winding device 107 (refer to Figure 3 ). The fiber Y sucked from the suction port 16a flows into the pipe interior of the fiber waste transfer pipe 11.

[0096] Figure 3 is a cross-sectional view showing an example of the suction portion 15 provided in the fiber waste transfer pipe 11. In addition, Figure 3 is a state where the opening / closing member 19 is pushed upward and the suction port 16a is opened. Refer to Figure 3 . The suction pipe 16 is connected to the fiber waste transfer pipes 11 (11a to 11d) in an inclined state. The suction pipe 16 is connected to the fiber waste transfer pipes 11 (11a to 11d) at an acute angle with the direction from the upstream side ( Figure 3 shown as the rear side) to the downstream side ( Figure 3 shown as the front side) of the air flow flowing in the pipe interior of the fiber waste transfer pipe 11. That is, the suction pipe 16 is connected to the fiber waste transfer pipes 11 (11a to 11d) at an acute angle with the direction from one end side ( Figure 3 shown as the rear side) toward the other end side ( Figure 3 shown as the front side) connected to the fiber waste collection container 13. Therefore, the fiber Y sucked from the suction port 16a (refer to Figure 1)When flowing into the pipe interior of the fiber debris transfer pipe 11, it flows in the direction from the upstream side to the downstream side of the air flow in the pipe interior of the fiber debris transfer pipe 11. The fiber Y flowing into the pipe interior of the fiber debris transfer pipe 11 is transferred to the downstream side by the air flow flowing in the pipe interior of the fiber debris transfer pipe 11.

[0097] A compressed air injection nozzle hole 16d and a guide path 16e are provided in the suction pipe 16. The compressed air injection nozzle hole 16d is provided as a nozzle hole for injecting compressed air into the suction pipe 16 between one end side provided with the outlet opening 16b and the other end side provided with the suction port 16a. The compressed air injection nozzle hole 16d is configured to inject compressed air in the suction pipe 16 toward the outlet opening 16b side, that is, the one end side. In the present embodiment, two compressed air injection nozzle holes 16d are provided. Both of the two compressed air injection nozzle holes 16d extend from the suction port 16a side toward the outlet opening 16b side and from the outer peripheral side of the suction pipe 16 toward the inner peripheral side, and thus communicate with the suction flow path 16c. According to this configuration, both of the two compressed air injection nozzle holes 16d are configured to inject compressed air in the suction pipe 16 toward the outlet opening 16b side. In addition, the number of the compressed air injection nozzle holes 16d is not limited to two.

[0098] The guide path 16e of the suction pipe 16 is provided in the suction pipe 16 as a flow path of compressed air that extends in a ring shape along the circumferential direction of the suction pipe 16. The guide path 16e communicates with the compressed air injection nozzle hole 16d and also communicates with a cylinder chamber 20 described later. The compressed air supplied to the cylinder chamber 20 flows into the guide path 16e, flows from the guide path 16e into the compressed air injection nozzle hole 16d, and is injected into the suction flow path 16c.

[0099] The cylinder chamber 20 is formed as a cylindrical space inside the main body portion 18 and is configured to be supplied with compressed air. The cylinder chamber 20 communicates with the guide path 16e of the suction pipe 16 via a communication path 20a provided inside the main body portion 18. Therefore, the compressed air supplied to the cylinder chamber 20 flows into the guide path 16e and then into the compressed air injection nozzle hole 16d. Further, a compressed air supply pipe 23 for connecting and communicating the compressed air to be injected from the compressed air injection nozzle hole 16d of the suction pipe 16 is connected to the cylinder chamber 20. The compressed air supply pipe 23 is connected to a compressed air supply source (not shown) that supplies compressed air. An electromagnetic valve 24 is provided in the compressed air supply pipe 23, and the electromagnetic valve 24 controls the supply of compressed air to the cylinder chamber 20 by opening and closing in a manner that switches between a connected state and a cut-off state. When the opening operation of the electromagnetic valve 24 is performed, the compressed air supply pipe 23 becomes in a connected state, and compressed air is supplied from the compressed air supply pipe 23 to the cylinder chamber 20. When the closing operation of the electromagnetic valve 24 is performed, the compressed air supply pipe 23 becomes in a cut-off state, and the supply of compressed air from the compressed air supply pipe 23 to the cylinder chamber 20 is cut off.

[0100] In the suction portion 15, in a state where the compressed air supply pipe 23 is cut off and compressed air is not supplied to the cylinder chamber 20 with the electromagnetic valve 24 closed, the opening / closing member 19 rotates around the rotation shaft 29 by the acting force of the spring member 22 disposed in the spring chamber 25, and the suction port 16a is closed. In this state, the suction operation of the suction portion 15 for the fiber Y (refer to Figure 1 ) is not performed. On the other hand, in a state where the compressed air supply pipe 23 is in a connected state and compressed air is supplied to the cylinder chamber 20 with the electromagnetic valve 24 open, the piston 21 is displaced upward and pushes up the opening / closing member 19 upward, and the suction port 16a is opened. Further, in a state where compressed air is supplied to the cylinder chamber 20, the compressed air flows into the compressed air injection nozzle hole 16d, and the compressed air is injected from the compressed air injection nozzle hole 16d into the suction flow path 16c of the suction pipe 16. The compressed air injected into the suction flow path 16c is injected toward the outlet opening 16b side. In this way, by using the compressed air injected from the compressed air injection nozzle hole 16d into the suction pipe 16, an air flow for transporting the fiber Y toward the fiber debris transfer pipe 11 side is generated inside the suction pipe 16, and further, an air flow for transporting the fiber Y toward the cyclone separator 30 side ( Figure 3 the front side shown) is generated inside the fiber debris transfer pipe 11. In this way, the fiber Y sucked from the suction port 16a can be transferred inside the pipe of the fiber debris transfer pipe 11.

[0101] In addition, if the fiber Y can be sucked from the suction port 16a (refer to Figure 1) and can transfer the inhaled fibers Y within the pipes of the fiber debris transfer pipes 11 (11a to 11d), and its method is not limited to a specific method. For example, compressed air can be sprayed into the suction pipe 16 as described above, or the inside of the fiber debris transfer pipe 11 can be made negative pressure by using, for example, a blower to suck the inside of the fiber debris transfer pipe 11.

[0102] In addition, the air flow rate inside the pipes of the fiber debris transfer pipes 11 (11a to 11d) is preferably 1000 m / min or more. Therefore, when the air flow rate inside the pipes of the fiber debris transfer pipe 11 does not meet 1000 m / min, for example, it can also be configured such that a connection portion for supplying compressed air is provided at one end (for example, the rear end) of the fiber debris transfer pipe 11 (11a to 11d), and the compressed air supplied from a compressed air supply source (not shown) can be supplied to the fiber debris transfer pipe 11 (11a to 11d) from one end side of the fiber debris transfer pipe 11 (11a to 11d). In addition, the blower provided in the past can also be arranged near the cyclone separator 30 to suck the inside of the fiber debris transfer pipe 11 (11a to 11d) to supplement the insufficient part required to meet, for example, the air flow rate of 1000 m / min.

[0103] [An example of a cyclone separator]

[0104] Figure 4 is a perspective view showing an example of the cyclone separator 30. Figure 5 is a top view showing an example of the cyclone separator 30. Figure 6 is a front view showing an example of the cyclone separator 30. In addition, in Figures 4 - 6 , the illustration of the emission sound suppressor described later is omitted. In Figures 4 - 6 , the connection portion with the fiber debris transfer pipe 11 is also shown. In addition, in the present embodiment, as described above, the cyclone separator 30 includes the first cyclone separator 30a to the fourth cyclone separator 30d, but the first cyclone separator 30a to the fourth cyclone separator 30d all have the same configuration.

[0105] Referring to Figure 4 , the cyclone separator 30 is configured to include: a cylindrical main body portion 32; a conical portion 42 provided below the main body portion 32; a fiber debris discharge portion 46 that discharges the fiber debris separated from the air to the fiber debris recovery container 13 (refer to Figure 2 ); and an air discharge portion 50 that discharges the air from which the fiber debris has been separated to the outside. In addition, although the details will be described later, the cyclone separator 30 also includes an emission sound suppressor 60 (refer to Figure 7) The emission sound suppressor 60 suppresses the emission sound that may be generated due to the discharge of the air after the separation of the fiber debris. The concept including both the above-mentioned "main body portion 32" and "conical portion 42" corresponds to the "separation portion" of the present invention.

[0106] The main body portion 32 includes a cylindrical portion 34 that constitutes a side wall and an upper surface portion 36 that constitutes the upper end surface of the cylindrical portion 34. An opening portion 38 is formed in the upper surface portion 36 of the main body portion 32. The opening portion 38 is concentric with the cylindrical portion 34 and has a diameter smaller than that of the cylindrical portion 34. The main body portion 32 uses centrifugal force to move the fiber debris downward along the wall surface of the cylindrical portion 34, and allows the air after the fiber debris is separated to flow out from the opening portion 38. In addition, the cyclone separator 30 does not completely separate the air from the fiber debris, and the air is also contained in the fiber debris after the separation. Therefore, not only the fiber debris is discharged from the fiber debris discharge portion 46, but also the unseparated air is discharged together with the fiber debris.

[0107] The upper end portion of the conical portion 42 is a circle with the same diameter size as the cylindrical portion 34, and the lower end portion is a circle with a diameter size smaller than that of the upper end portion. The upper end portion and the lower end portion of the conical portion 42 are open, and it has an inclined portion 44 that gradually tapers linearly from the upper end portion to the lower end portion in the front view. Regarding this inclined portion 44, although the detailed content will be described later, it is preferably that the angle θ (hereinafter referred to as "cone angle θ") between the vertical direction and the direction of the inclined portion 44 is in the range of 7 to 10 [°] (including the upper and lower limit values). The conical portion 42 is connected to the lower end portion of the cylindrical portion 34 at the upper end portion. In addition, there is no component that separates the interiors of the conical portion 42 and the main body portion 32 from each other, and the interior of the conical portion 42 communicates with the interior of the main body portion 32.

[0108] The fiber debris discharge portion 46 is a cylindrical shape with both ends open. The inner diameter of the fiber debris discharge portion 46 is the same size as the inner diameter of the lower end portion of the conical portion 42. The fiber debris discharge portion 46 is connected to the lower end portion of the conical portion 42 at the upper end portion in a concentric manner with the lower end portion of the conical portion 42. In addition, the fiber debris discharge portion 46 is connected to the fiber debris recovery container 13 (refer to Figure 2 ) at the lower end portion. There is no component that separates the interiors of the fiber debris discharge portion 46 and the conical portion 42 from each other, and the interior of the fiber debris discharge portion 46 communicates with the interior of the main body portion 32.

[0109] The air discharge portion 50 has a cylindrical pipe material with both ends open, and the inner diameter of the air discharge portion 50 is the same size as the diameter of the opening portion 38. The air discharge portion 50 is connected to the opening portion 38 at the lower end in a concentric manner with the opening portion 38. More specifically, the air discharge portion 50 is connected to the main body portion 32 in such a way that the cylindrical portion of the air discharge portion 50 does not enter the inside of the main body portion 32, and the lower end portion of the cylindrical portion of the air discharge portion 50 is coplanar with the lower surface of the upper surface portion 36 of the main body portion 32. The air discharge portion 50 discharges the air that has flowed into the opening portion 38 of the main body portion 32 after separating the fiber scraps toward the outside. Specifically, a discharge sound suppressor 60 (refer to Figure 7 ) is provided in the air discharge portion 50, and the air flowing out from the opening at the upper end portion of the air discharge portion 50 is discharged to the outside via the discharge sound suppressor 60.

[0110] Figure 7 FIG. is a perspective view showing an example of a cyclone separator 30 for explaining the discharge sound suppressor 60. Figure 8 FIG. is a view for explaining the discharge sound suppressor 60. In Figure 7 the state where the discharge sound suppressor 60 is removed from the air discharge portion 50 is shown.

[0111] The discharge sound suppressor 60 has a function of preventing the waste yarn flowing into the air discharge portion 50 from the main body portion 32 from being discharged to the outside and a function of suppressing the discharge sound generated by discharging the air to the outside. The discharge sound suppressor 60 has an outer fitting member 62, a shielding member 64, and a deceleration portion 65, and is integrally formed.

[0112] The outer fitting member 62 has a linear cylindrical shape with opening portions 621 and 622 having substantially the same diameter formed at the upper end portion and the lower end portion, respectively, and an air passage for the air discharged from the air discharge portion 50 is formed inside. By fitting the opening portion 622 of the outer fitting member 62 to the air discharge portion 50 which is a cylindrical pipe material, that is, arranging it on the radially outer side of the air discharge portion 50, the discharge sound suppressor 60 is mounted on the cyclone separator 30. When the outer fitting member 62 is fitted to the air discharge portion 50, the air discharged from the air discharge portion 50 flows into the outer fitting member 62 from the opening portion at the lower end 622 of the outer fitting member 62 and is discharged to the outside from the opening portion at the upper end 621. Since the shielding member 64 and the deceleration portion 65 are integrally formed in the outer fitting member 62, both the function of preventing the waste yarn from being discharged to the outside and the function of suppressing the discharge sound can be achieved only by arranging the discharge sound suppressor 60 on the radially outer side of the air discharge portion 50. In addition, the above-mentioned "opening portion 621" corresponds to the "opening portion at one end" of the present invention.

[0113] The externally fitted member 62 is configured such that its inner wall surface is radially outside the edge portions of the opening portions 621 and 622. That is, when the cyclone separator 30 is installed in the air discharge portion 50, the externally fitted member 62 houses the opening portion 38 of the main body portion 32 inside its inner wall surface when viewed axially. The externally fitted member 62 configured in this way forms an air passage for the air discharged from the air discharge portion 50 along the axial direction. Additionally, it is preferable that when the externally fitted member 62 is externally fitted to the air discharge portion 50, the gap between the air discharge portion 50 and the externally fitted member 62 is as small as possible.

[0114] The shielding member 64 is provided inside the externally fitted member 62 and at a position spaced a predetermined distance upward from the opening portion 622. When the externally fitted member 62 is disposed radially outside the air discharge portion 50, the shielding member 64 is disposed directly above the opening region 52 of the air discharge portion 50. The opening region 52 is the end portion of the cylindrical air discharge portion 50, that is, the opening region at the boundary portion between the air discharge portion 50 and the emission sound suppressor 60. The shielding member 64 is configured such that when disposed directly above the opening region 52, it partially blocks the opening region 52 to maintain the discharge of air from the air discharge portion 50 to the outside and block the discharge of waste yarn to the outside. Specifically, the shielding member 64 has, for example, a plurality of gaps 66 and a lattice portion 68. The lattice portion 68 is a portion formed in a lattice shape and is provided perpendicular to the flow direction of the air discharged from the air discharge portion 50 to the outside, that is, the Y direction (positive direction). The air is discharged to the outside through the plurality of gaps 66. The waste yarn is caught by the lattice portion 68 and is difficult to be discharged to the outside. Additionally, the "opening region 52" corresponds to the "air discharge port" of the present invention.

[0115] The above-described shielding member 64 is configured such that when disposed directly above the opening region 52, it partially blocks the opening region 52, but is not limited thereto, and may be provided at any position between the opening region 52 and the opening portion 621 to prevent fiber debris from being discharged to the outside. That is, the shielding member 64 only needs to prevent fiber debris from being discharged to the outside from the opening portion 621 at least.

[0116] The decelerating portion 65 disturbs the air flow toward the outside along the axial direction of the air discharge portion 50, that is, the axial direction of the discharge sound suppressor 60, to decelerate the flow velocity. The decelerating portion 65 is provided above the shielding member 64 and on the inner wall surface of the outer fitting member 62. The decelerating portion 65 has a plurality of corrugated members 651 that protrude radially inward from the inner wall surface of the outer fitting member 62 toward the upper oblique direction. The plurality of corrugated members 651 are arranged at equal intervals along the axial direction. Flanges 651A are formed on the plurality of corrugated members 651, and the respective flanges 651A are connected by support members 651B extending along the axial direction. Further, by fixing the support members 651B to the inner wall surface of the outer fitting member 62, the plurality of corrugated members 651 are supported inside the outer fitting member 62. By providing the decelerating portion 65 on the inner wall surface of the outer fitting member 62, components for providing the decelerating portion 65 are not additionally required, and an increase in the number of parts can be prevented. Further, the plurality of corrugated members 651 may be directly formed on the inner wall surface of the outer fitting member 62.

[0117] The discharge sound generated by the air flowing toward the outside is suppressed by the plurality of corrugated members 651. That is, the air flowing in the discharge sound suppressor 60 from the opening area 52 toward the opening 621 is obstructed by the plurality of corrugated members 651, thereby suppressing the discharge sound. The above-mentioned "corrugated member" corresponds to the "obstructing portion" of the present invention.

[0118] Figure 9 This is a diagram for explaining the principle of suppressing the discharge sound. In Figure 9 a cross-section as viewed from the side of the discharge sound suppressor 60 is simply shown.

[0119] The air discharged from the air discharge portion 50 is discharged linearly to the outside from the opening 621 of the outer fitting member 62 through the shielding member 64 as shown by the blank arrow in Figure 9 . That is, the air passage is linear. At this time, a part of the air discharged toward the outside passes near the plurality of corrugated members 651, and thus, as shown by the black line arrow in Figure 9 , it hits the plurality of corrugated members 651 and deviates from the air passage, flowing toward the inner wall side of the outer fitting member 62. Then, when reflected by the inner wall of the outer fitting member 62, it flows into Figure 9The main flow of air indicated by the blank arrow. That is, the decelerating portion 65 causes a part of the air flowing toward the opening portion 621 to stay or circulate between the pleated members 651 adjacent in the vertical direction. In this way, the exhaust sound suppressor 60 can cause the air flow to be disordered without providing a complicated mechanism, can reduce the flow velocity of the air discharged toward the opening portion 621, and further can attenuate the energy of the air flowing inside the exhaust sound suppressor 60 toward the opening portion 621. In this way, the exhaust sound generated by discharging air from the opening portion 621 of the exhaust sound suppressor 60 is suppressed. In addition, by causing a part of the air flowing toward the opening portion 621 to stay or circulate between the pleated members 651 adjacent in the vertical direction, the air can be retained inside the exhaust sound suppressor 60, and the discharge of air from the opening portion 621 can be suppressed. In addition, the "between the pleated members 651" described above corresponds to the "retaining portion" of the present invention.

[0120] In addition, the exhaust sound suppressor 60 is configured such that the diameter of the opening portion 621 of the cylindrical outer fitting member 62 is the same as or larger than the opening area 52 of the air discharge portion 50. With this configuration, the air is discharged straight from the opening area 52 of the air discharge portion 50 to the opening portion 621 of the outer fitting member 62. Therefore, the air passage for the air discharged toward the outside can be ensured and the flow velocity of the air can be decelerated, and further the exhaust sound can be suppressed.

[0121] In addition, the diameter of the opening portion 621 does not have to be the same as the diameter of the smallest portion in the cross section orthogonal to the direction of the air flowing inside the exhaust sound suppressor 60 toward the outside, and may be configured to be larger than the diameter of the smallest portion in the cross section orthogonal to the direction of the air flowing inside the exhaust sound suppressor 60 toward the outside. That is, it may be configured such that the opening area of the opening portion 6A is larger than the cross-sectional area of the smallest portion in the cross section orthogonal to the direction of the air flowing inside the exhaust sound suppressor 60 toward the outside. Specifically, the plurality of pleated members 651 may be configured such that, when viewed from the axial direction of the exhaust sound suppressor 60, the front end portion on the radially inner side is located at a position radially inner than the opening portion 621 of the outer fitting member 62. Even with this configuration, the air passage for the air discharged toward the outside can be ensured and the flow velocity of the air can be decelerated, and further the exhaust sound can be suppressed.

[0122] In addition, the plurality of pleated members 651 and the opening area 52 (refer to Figure 7)They do not overlap axially. Therefore, in the axial direction of the externally fitted member 62, an air passageway with at least the same area as the opening area 52 of the air discharge portion 50 is ensured, so the discharge of air is not obstructed. In this way, the exhaust sound suppressor 60 can suppress the exhaust sound without obstructing the discharge of air. At this time, it is preferable to provide a plurality of corrugated members 651 in the exhaust sound suppressor 60 so as to be able to suppress the exhaust sound by at least 5 dB or more.

[0123] In addition, the externally fitted member 62, the shielding member 64, and the decelerating portion 65 of the exhaust sound suppressor 60 are integrally formed, but the shielding member 64 may not be provided. For example, the shielding member 64 may also be a member different from the exhaust sound suppressor 60. In addition, the shielding member 64 does not necessarily have to be provided at the axial end of the externally fitted member 62, and can be provided at any position in the axial direction of the externally fitted member 62 as long as it is configured to locally block the opening area 52 when the externally fitted member 62 is externally fitted to the air discharge portion 50. In addition, the lattice portion 68 does not necessarily have to be provided perpendicular to the air flow direction, and can also be provided to be inclined with respect to the air flow direction. Furthermore, the shielding member 64 does not necessarily have to have a lattice portion 68 formed in a lattice shape, and instead of the lattice portion 68 formed in a lattice shape, for example, it can be a portion formed in a mesh shape, a shape formed by combining a lattice shape and a mesh shape, or other shapes.

[0124] In addition, the shielding member 64 is configured to locally block the opening area 52, but is not limited thereto. That is, the portion that locally blocks is not necessarily limited to the opening area 52, as long as it can block the return filaments so that the return filaments do not discharge to the outside through the air discharge portion 50. As long as the return filaments can be captured on the path that becomes the passage of the return filaments from the main body portion 32 flowing into the air discharge portion 50 to being discharged to the outside, the discharge of the return filaments to the outside can be suppressed. Therefore, for example, the opening portion 38 (see Figure 4 ) can also be configured such that the lower end portion 50a (see Figure 6 ) of the cylindrical portion of the air discharge portion 50, etc., is locally blocked. That is, as long as it is configured such that any portion between the lower end portion 50a of the cylindrical portion of the air discharge portion 50 and the opening area 52 is locally blocked, the discharge of the return filaments through the air discharge portion 50 to the outside can be blocked.

[0125] In addition, as Figure 6As shown, it is preferable that the lower end portion 50a of the cylindrical portion of the air discharge portion 50 is above the upper end portion 11U of the fiber debris transfer pipe 11. This is because, according to the inventor's opinion of the present application, when the lower end portion 50a of the cylindrical portion of the air discharge portion 50 is below the upper end portion 11U of the fiber debris transfer pipe 11, the fiber debris will wind around the cylindrical portion of the air discharge portion 50, hindering the good separation of the fiber debris from the air. Therefore, by making the lower end portion 50a of the cylindrical portion of the air discharge portion 50 at least above the upper end portion 11U of the fiber debris transfer pipe 11, it is possible to prevent the fiber debris from winding around the cylindrical portion of the air discharge portion 50 and to separate the fiber debris from the air well. In the present embodiment, as described above Figure 4 As shown, since the lower end portion of the cylindrical portion of the air discharge portion 50 is coplanar with the lower surface of the upper surface portion 36 of the main body portion 32 (refer to Figure 4 ), the lower end portion 50a of the cylindrical portion of the air discharge portion 50 is above the upper end portion 11U of the fiber debris transfer pipe 11, and the fiber debris can be separated from the air well.

[0126] However, when a plurality of fiber debris transfer pipes 11 (11a to 11d) are connected to one cyclone separator 30, the connection positions of the fiber debris transfer pipes 11 (11a to 11d) to the cyclone separator 30 are restricted. For example, the connection position of one fiber debris transfer pipe 11a among the plurality of fiber debris transfer pipes 11 (11a to 11d) is restricted by the other fiber debris transfer pipes 11b to 11d. Thus, it may not be possible to connect one fiber debris transfer pipe 11a to the cyclone separator 30 in a manner that is below the lower end portion of the cylindrical portion of the air discharge portion 50. Therefore, by connecting the plurality of fiber debris transfer pipes 11 (11a to 11d) to the cyclone separator 30 one by one, it is possible to connect the fiber debris transfer pipes 11 (11a to 11d) to the cyclone separator 30 at an appropriate position where the fiber debris and the air are well separated, that is, at a position where the fiber debris transfer pipes 11 (11a to 11d) are below the lower end portion of the cylindrical portion of the air discharge portion 50.

[0127] There is no component that separates the interiors of the air discharge portion 50 and the main body portion 32 from each other, and the interior of the air discharge portion 50 communicates with the interior of the main body portion 32. In addition, according to the inventor's opinion, when the inner diameter of the fiber debris discharge portion 46 (that is, the inner diameter of the lower end portion of the tapered portion 42) is larger than the inner diameter of the air discharge portion 50 (that is, the diameter of the opening portion 38), the separation of the fiber debris from the air becomes insufficient, and it is possible to discharge the fiber debris from the air discharge portion 50. Therefore, it is preferable that the inner diameter of the fiber debris discharge portion 46 (that is, the inner diameter of the lower end portion of the tapered portion 42) is smaller than the inner diameter of the air discharge portion 50 (that is, the diameter of the opening portion 38).

[0128] In addition, in the present embodiment, both the air discharge portion 50 and the fiber debris discharge portion 46 are cylindrical, but are not limited thereto, and may also be square tube-shaped. In this case, it is preferable that the horizontal opening area of the portion communicating with the inside of the main body portion 32 (i.e., the connecting portion with the upper surface portion 36) is larger than the horizontal opening area of the fiber debris discharge portion 46.

[0129] As Figure 5 shown, the fiber debris transfer pipe 11 is connected to the main body portion 32 at the upper part of the main body portion 32 of the cyclone separator 30 with its longitudinal direction along the inner peripheral wall 35 of the main body portion 32. That is, the fiber debris transfer pipe 11 is connected to the main body portion 32 in such a manner that it becomes a tangent to the cylindrical portion 34 of the main body portion 32 of the cyclone separator 30 in a plan view. Further in other words, the fiber debris transfer pipe 11 is connected to the main body portion 32 of the cyclone separator 30 in such a manner that the traveling direction of the air containing fiber debris transferred in the pipe of the fiber debris transfer pipe 11 is along the inner peripheral wall 35 of the cylindrical portion 34. By connecting the fiber debris transfer pipe 11 to the cyclone separator 30 in this way, as Figure 4 shown, the air containing fiber debris transferred in the pipe of the fiber debris transfer pipe 11 moves circumferentially along the inner peripheral wall 35 of the cylindrical portion 34. Therefore, the fiber debris contained in the air is transferred downward while rotating circumferentially along the inner peripheral wall 35 of the cylindrical portion 34 under the action of centrifugal force, i.e., centrifugal separation. The fiber debris moving downward while rotating along the inner peripheral wall 35 of the cylindrical portion 34 is further transferred toward the fiber debris discharge portion 46 along the inner wall 45 of the inclined portion 44. The fiber debris transferred toward the fiber debris discharge portion 46 is transferred from the fiber debris discharge portion 46 to the fiber debris recovery container 13 (refer to Figure 2 ). In this way, the fiber debris is separated from the air containing fiber debris transferred in the pipe of the fiber debris transfer pipe 11, and the separated fiber debris is recovered in the fiber debris recovery container 13. On the other hand, the air from which the fiber debris has been separated is discharged to the outside from the air discharge portion 50.

[0130] In addition, in the case where a plurality of fiber debris transfer pipes 11 (11a to 11d) are respectively connected to the cyclone separator 30 one by one, in addition to being able to connect the fiber debris transfer pipes 11 (11a to 11d) to the cyclone separator 30 at appropriate positions, the inner peripheral wall 35 of the cylindrical portion 34 can also be ensured, and the fiber debris can be reliably conveyed to the conical portion 42.

[0131] [Function and Effect]

[0132] In the fiber debris recovery device 1 according to the present embodiment, the fibers Y sucked from the suction part 15 are transferred inside the pipe of the fiber debris transfer pipe 11, and are recovered as fiber debris into the fiber debris recovery container 13 via the cyclone separator 30 connected to the fiber debris transfer pipe 11. In the cyclone separator 30, the fiber debris is separated from the air transferred inside the pipe of the fiber debris transfer pipe 11. The separated fiber debris is recovered into the fiber debris recovery container 13, and the air from which the fiber debris has been separated is discharged from the air discharge part 50. Thus, by providing the cyclone separator 30 between the fiber debris transfer pipe 11 and the fiber debris recovery container 13, the fiber debris and the air are appropriately separated, and it is possible to suppress the discharge of the fiber debris from the air discharge part 50 to the outside.

[0133] In addition, in the fiber debris recovery device 1 according to the present embodiment, the fiber debris transfer pipe 11 is connected to the main body part 32 such that the longitudinal direction of the fiber debris transfer pipe 11 is along the inner peripheral wall 35 of the cylindrical part 34. Therefore, the air moves in the circumferential direction along the inner peripheral wall 35 of the cylindrical part 34, and the fiber debris transferred inside the pipe of the fiber debris transfer pipe 11 moves downward along the inner peripheral wall 35 of the cylindrical part 34 and the inner wall 45 of the inclined part 44 under the action of centrifugal force, i.e., centrifugal separation, and is separated from the air. The fiber debris separated from the air is recovered into the fiber debris recovery container 13 via the fiber debris discharge part 46. The clean air from which the fiber debris has been separated is discharged from the air discharge part 50. Among them, the air discharge part 50 is connected to the main body part 32 by communicating the inside of the air discharge part 50 with the inside of the main body part 32 in such a manner that the air discharge part 50 does not enter the inside of the main body part 32 and the lower end part of the air discharge part 50 is coplanar with the upper surface part 36 of the main body part 32. Therefore, the fiber debris does not wind around the air discharge part 50, and the fiber debris and the air can be separated well.

[0134] In addition, in the fiber debris recovery device 1 according to the present embodiment, the conical part 42 has an inclined part 44, and the diameter of the inclined part 44 becomes smaller from the connection part with the main body part 32 toward the fiber debris discharge part 46. Since the fiber debris and the air can be separated in the inclined part 44, it is possible to further suppress the discharge of the fiber debris from the air discharge part 50 to the outside. In addition, by forming the inclined part 44 into a conical shape with an angle formed with the vertical direction in the range of 7 to 10° (including the upper and lower limit values), the fiber debris and the air can be separated with high precision, and by preventing the fiber debris discharge part 46 from being blocked by the fiber debris, the fiber debris can be discharged well from the fiber debris discharge part 46.

[0135] In addition, in the fiber debris recovery device 1 according to the present embodiment, the inner diameter of the fiber debris discharge part 46 (i.e., the inner diameter of the lower end part of the conical part 42) is smaller than the inner diameter of the air discharge part 50 (i.e., the diameter of the opening part 38). Therefore, the fiber debris and the air can be appropriately separated, and it is possible to more effectively suppress the discharge of the fiber debris from the air discharge part 50 to the outside.

[0136] In addition, in the fiber debris recovery device 1 according to the present embodiment, since the cyclone separator 30 is provided with the discharge sound suppressor 60, fiber debris can be appropriately separated from air, and the discharge sound when discharging air can be suppressed by at least 5 dB or more. Further, in the fiber debris recovery device 1 according to the present embodiment, in the discharge sound suppressor 60, an air passage for the air discharged from the air discharge portion 50 can be ensured, and thus the discharge sound can be suppressed without hindering the discharge of air.

[0137] [Experimental Example of Cyclone Separator 30]

[0138] The present embodiment was verified by the following experimental example. The results of this experimental example will be described. Figure 10 is an example of the front view of the cyclone separator 30. Figure 11 is an example of the experimental results showing the relationship between the cone angle θ, the flow rate of air in the air discharge portion 50, and the flow rate of air in the fiber debris discharge portion 46. The fiber used in Experimental Example 1, Experimental Example 2, and Experimental Example 3 described later was a 75 denier false twist yarn.

[0139] In addition, in Figure 10 , the vertical direction is set as the Y direction, particularly the upward direction is set as the Y direction (positive direction), and the downward direction is set as the Y direction (negative direction). Figure 11 The flow rate shown represents the flow rate of the vector component in the Y direction. When the value of the flow rate is positive, it indicates that the air flow is in the Y direction (positive direction), and when the value of the flow rate is negative, it indicates that the air flow is in the Y direction (negative direction).

[0140] In addition, with reference to Figure 10 , the dimensions of each part of the cyclone separator 30 are set as the Y-direction length a of the entire cyclone separator 30, the Y-direction length b of the main body portion 32, the inner diameter c of the main body portion 32, the Y-direction length d of the air discharge portion 50, the inner diameter e of the air discharge portion 50, the Y-direction length f of the inclined portion 44, the Y-direction length g of the fiber debris discharge portion 46, the inner diameter h of the fiber debris discharge portion 46, and the cone angle θ. In Experimental Example 2 described later, the inner diameter of the inlet of the fiber debris transfer pipe 11, which is the connecting portion to the cyclone separator 30, is set as i.

[0141] (Experimental Example 1)

[0142] In Experimental Example 1, the dimensions of each part of the cyclone separator 30 were set as a = 280 mm, b = 80 mm, c (inner diameter) = 80 mm, d = 50 mm, e (inner diameter) = 48 mm, g = 10 mm, h (inner diameter) = 31 mm, and the cone angle θ was changed to verify the goodness of the fiber scraps discharged from the fiber scrap discharge part 46 (hereinafter referred to as "goodness of fiber scrap discharge"). Regarding the cone angle θ, verification was carried out at 10°, 15°, 30°, and 40°. In addition, the length f of the inclined part 44 in the Y direction is a dimension determined according to the cone angle θ.

[0143] The verification results obtained in Experimental Example 1 are shown in Table 1. Table 1 is an example of the experimental results showing the relationship between the cone angle θ and the goodness of fiber scrap discharge. In order to discharge the fiber scraps well from the fiber scrap discharge part 46, it is important to agglomerate the fiber scraps into a lump. The case where the fiber scraps become a lump and are discharged well from the fiber scrap discharge part 46 is judged as OK, the case where the fiber scraps do not become a lump and are not discharged from the fiber scrap discharge part 46 is judged as NG, and the case where the fiber scraps are agglomerated into a lump but the fiber scrap discharge part 46 is blocked at a frequency of 1 out of 5 times is judged as △.

[0144]

Table 1

[0145] Cone angle θ 10° 15° 30° 40° Goodness of fiber debris discharge △ NG NG NG

[0146] As shown in Table 1, if the cone angle θ exceeds 10°, the goodness of fiber scrap discharge is judged as NG. When the cone angle θ is 10°, according to Experimental Example 1, the fiber scrap discharge part 46 is blocked by the fiber scraps 1 out of 5 times, so it is judged as △, but the fiber scraps become a lump and are discharged from the fiber scrap discharge part 46 4 out of 5 times, so it is considered close to being judged as OK. Although not shown in Table 1, when the cone angle θ is less than 10°, the goodness of fiber scrap discharge is all judged as OK.

[0147] From the above verification results, from the viewpoint of the goodness of the waste yarn discharged from the fiber scrap discharge part 46, the cone angle θ is preferably 10° or less.

[0148] (Experimental Example 2)

[0149] In Experimental Example 2, the dimensions of each part of the cyclone separator 30 were set as a = 300.1 mm, b = 90 mm, c = 90 mm, d = 30 mm, e = 48 mm, f = 170.1 mm, g = 10 mm, and i = 21 mm. Only the cone angle θ was changed, and the changes in the air flow rate in the Y direction in the air discharge part 50 and the air flow rate in the Y direction in the fiber debris discharge part 46 were verified. Regarding the cone angle θ, verification was carried out at 10°, 9°, 7°, and 5°. In addition, the inner diameter h of the fiber debris discharge part 46 is a dimension determined according to the cone angle θ. Furthermore, the air flow velocity inside the fiber debris transfer pipe 11 was assumed to be 1000 m / min, and the mass flow rate of the air at the inlet of the fiber debris transfer pipe 11 was set to 0.014896 kg / s.

[0150] According to the verification results obtained in Experimental Example 2, it can be seen that on the premise that the inner diameter e of the air discharge part 50 and the inner diameter h of the fiber debris discharge part 46 are of fixed sizes, as Figure 11 shown, if the air flow rate discharged from the fiber debris discharge part 46 increases, the air flow rate discharged from the air discharge part 50 decreases. In addition, the air flow rate discharged from the air discharge part 50 decreases as the cone angle θ becomes smaller. On the other hand, for the air flow rate discharged from the fiber debris discharge part 46, with the cone angle θ being 7° as a branch, even if the cone angle θ is further decreased, it does not decrease but remains stable. Among them, if the inner diameter e of the air discharge part 50 and the inner diameter h of the fiber debris discharge part 46 are set to be fixed and the cone angle θ is decreased, the Y-direction length f of the inclined part 44 becomes larger. It is considered that if the Y-direction length f of the inclined part 44 becomes larger, the Y-direction length a of the entire cyclone separator 30 becomes larger and the pressure loss becomes larger. Therefore, it can be considered that if the cone angle is less than 7°, the ratio of the air flow rate discharged from the fiber debris discharge part 46 to the air flow rate discharged from the air discharge part 50 becomes larger. According to the inventor's opinion, if the air flow rate discharged from the fiber debris discharge part 46 is greater than the air flow rate discharged from the air discharge part 50, the separation of the fiber debris and the air cannot be performed well. Therefore, the lower limit of the cone angle θ is preferably 7° or more.

[0151] Based on the verification results of the above Experimental Example 1 and Experimental Example 2, it can be seen that the cone angle θ is preferably in the range of 7° to 10° (including the upper limit value and the lower limit value).

[0152] (Experimental Example 3)

[0153] In Experimental Example 3, the relationship between the inner diameter h of the fiber debris discharge portion 46 and the ratio of the flow rate of the air discharged from the fiber debris discharge portion 46 to the flow rate of the air discharged from the air discharge portion 50 was verified. In addition, as the function of the air discharge portion 50, as long as the air after the fiber debris is separated can be discharged into the external air, the inner diameter e of the air discharge portion 50 was fixed at, for example, 48 mm. Regarding the results of the experiment, although the illustration is omitted, the flow rate (absolute value) of the air in the Y direction (negative direction) in the fiber debris discharge portion 46 increases as the inner diameter h of the fiber debris discharge portion 46 increases, and decreases as the inner diameter h of the fiber debris discharge portion 46 decreases. On the other hand, the flow rate (absolute value) of the air in the Y direction (positive direction) in the air discharge portion 50 has the following tendency: it decreases as the inner diameter h of the fiber debris discharge portion 46 increases, and increases as the inner diameter h of the fiber debris discharge portion 46 decreases. As described above, according to the inventor's opinion, it is preferable that the inner diameter h of the fiber debris discharge portion 46 is smaller than the inner diameter e of the air discharge portion 50. However, it is known that it is difficult to discharge the fiber debris from the fiber debris discharge portion 46 when the inner diameter h of the fiber debris discharge portion 46 is 27 mm or less. In addition, when the inner diameter h of the fiber debris discharge portion 46 is 27 mm, the ratio of the flow rate of the air discharged from the air discharge portion 50 to the flow rate of the air discharged from the fiber debris discharge portion 46 is approximately 7 to 3. This ratio decreases as the inner diameter h of the fiber debris discharge portion 46 increases. For example, in the range where the inner diameter h of the fiber debris discharge portion 46 is 27 mm to 35 mm, as the inner diameter h of the fiber debris discharge portion 46 increases, the ratio of the flow rate of the air discharged from the air discharge portion 50 to the flow rate of the air discharged from the fiber debris discharge portion 46 decreases. And it is known that when the inner diameter h of the fiber debris discharge portion 46 is 35 mm, the ratio of the flow rate of the air discharged from the air discharge portion 50 to the flow rate of the air discharged from the fiber debris discharge portion 46 is approximately 1 to 1. As described above, if the ratio of the flow rate of the air discharged from the fiber debris discharge portion 46 to the flow rate of the air discharged from the air discharge portion 50 increases, the separation of the fiber debris and the air cannot be performed well. Therefore, the inner diameter h of the fiber debris discharge portion 46 is preferably 35 mm or less.

[0154] In addition, the above Experimental Example 1, Experimental Example 2, and Experimental Example 3 are the results obtained by using the 75-denier false-twist yarn as described above, but the present inventor also performed the same verification on other fibers. As a result, for the false-twist yarn, polyester fiber, and polyamide fiber, by setting the inclined portion 44 to a conical shape with an angle formed with the vertical direction in the range of 7 to 10 [°] (including the upper and lower limits), the fiber debris and the air can be separated with high precision, and the fiber debris discharge portion 46 can be prevented from being blocked by the fiber debris, thereby enabling the fiber debris to be discharged well from the fiber debris discharge portion 46. In particular, for the 75-450-denier false-twist yarn, 150-denier PET, and nylon, significant effects were confirmed.

[0155] Figure 12 It is a top view of the cyclone separator 30 and is a top view showing an example of the change in the opening ratio of the gap 66 of the shielding member 64. (A) The opening ratio is 20%, (B) The opening ratio is 40%, (C) The opening ratio is 60%, (D) The opening ratio is 80%, (E) The opening ratio is 100%. In addition, the opening ratio is the ratio of the total area of the plurality of gaps 66 to the opening area when viewed from above with respect to the opening area 52 (refer to Figure 7 ). In Figure 12 , the shielding member 64 is not provided in the air discharge portion 50 shown in (E).

[0156] As Figure 12 shown in (A) to (D) of

[0157] [Experimental Example of Cyclone Separator 30]

[0158] However, as described above, if the flow rate of the air discharged from the fiber debris discharge portion 46 is greater than the flow rate of the air discharged from the air discharge portion 50, the separation of the fiber debris and the air cannot be performed well. On the other hand, in the case where the above-mentioned shielding member 64 is provided, the flow rate of the air discharged from the air discharge portion 50 to the outside is smaller than the case where the shielding member 64 is not provided. Therefore, even if the plurality of gaps 66 are uniformly provided, if the flow rate of the air discharged from the fiber debris discharge portion 46 exceeds the flow rate of the air discharged from the air discharge portion 50, it may also have an adverse effect on the separation of the air and the fiber debris by the cyclone separator 30.

[0159] Therefore, in the cyclone separator 30 of the present embodiment, an experiment on the preferred opening ratio was conducted. Refer to Figure 13 to describe the results of this experimental example. Figure 13 It is an example of the experimental results showing the relationship between the flow rate of the air in the air discharge portion 50 and the flow rate of the air in the fiber debris discharge portion 46. In addition, Figure 13 the flow rate shown is in the Y direction (refer to Figure 6) The flow rate of the vector component, when the value of the flow rate is positive, indicates that the air flow is in the Y direction (positive direction), and when the value of the flow rate is negative, indicates that the air flow is in the Y direction (negative direction).

[0160] In this experiment, the opening ratio of the opening area in plan view with respect to the opening area 52 was changed to 0%, 20%, 40%, 60%, 80%, and 100%, and the air flow rate in the air discharge portion 50 and the air flow rate in the fiber debris discharge portion 46 were measured. In addition, the air flow velocity inside the fiber debris transfer pipe 11 ( Figure 12 refer to) was assumed to be 1000 m / min. At the inlet of the fiber debris transfer pipe 11, the mass flow rate of air was set to 0.014896 kg / s, the area flow rate was set to 0.754768 m 3 / min (0.012579 m 3 / sec), and the density was set to 1.18415 kg / m 3 .

[0161] As Figure 13 shown, the air flow rate in the air discharge portion 50 increases as the opening ratio increases. In addition, the air flow rate (absolute value) in the fiber debris discharge portion 46 decreases as the opening ratio increases.

[0162] Among them, as described above, it can be known that if the air flow rate (absolute value) discharged from the fiber debris discharge portion 46 is greater than the air flow rate discharged from the air discharge portion 50, the separation of fiber debris and air cannot be performed well. Refer to Figure 13 , taking the opening ratio of 40% as a rough boundary, the air flow rate discharged from the air discharge portion 50 and the air flow rate (absolute value) discharged from the fiber debris discharge portion 46 are reversed. That is, if the opening ratio is 40% or more, the air flow rate discharged from the air discharge portion 50 is greater than the air flow rate (absolute value) discharged from the fiber debris discharge portion 46. In contrast, when the opening ratio is less than 40%, the air flow rate (absolute value) discharged from the fiber debris discharge portion 46 is greater than the air flow rate discharged from the air discharge portion 50. Therefore, for the shielding member 64, in order to perform the separation of fiber debris and air well, the opening ratio of the shielding member 64 is preferably 40% or more.

[0163] In addition, in the present embodiment, an exhaust sound suppressor 60 is provided in the air discharge portion 50. As described above, the exhaust sound suppressor 60 ensures the air passage of the air flowing inside the exhaust sound suppressor 60 and suppresses the exhaust sound. Therefore, even if the exhaust sound suppressor 60 is provided in the air discharge portion 50, the separation of fiber debris and air in the cyclone separator 30 can be performed well.

[0164] Thus, for the opening ratio of the shielding member 64, by making the opening ratio 40% or more, the relationship that the flow rate of the air discharged from the air discharge portion 50 is greater than the flow rate of the air discharged from the fiber debris discharge portion 46 is maintained. Thereby, good separation of the fiber debris from the air can be maintained, and the return yarn can be suppressed from being discharged to the outside through the air discharge portion 50. Furthermore, the silk yarn discharged to the outside through the air discharge portion 50 can be prevented from winding around the operator.

[0165] In addition, the plurality of gaps 66 are preferably sized such that the return yarn cannot pass through. That is, it is preferable that the shielding member 64 uniformly forms the plurality of gaps 66 so that the opening ratio is 40% or more and the return yarn is difficult to pass through. In order to capture the return yarn by the shielding member 64, it is preferable that the size of one gap 66 is smaller than the wire diameter of the return yarn. However, since the return yarn is flexible and bends, the size of one gap 66 does not necessarily have to be smaller than the wire diameter of the return yarn.

[0166] [Modification Example]

[0167] The embodiments of the present invention have been described above. The present invention is not limited to the above embodiments, and various changes can be made as long as they are within the scope of the claims. For example, it can be implemented with the following changes.

[0168] (First Modification Example)

[0169] Figure 14 It is a schematic diagram showing the fiber debris recovery device 1A of the first modification example. Refer to Figure 14 , in the first modification example, the fiber debris recovery device 1A includes a plurality of fiber debris recovery containers 13 (13a to 13d) and a plurality of cyclone separators 30 (30a to 30d) corresponding to the plurality of fiber debris transfer pipes 11 (11a to 11d) respectively.

[0170] Specifically, the fiber debris recovery container 13 is provided with a first fiber debris recovery container 13a corresponding to the first fiber debris transfer pipe 11a, a second fiber debris recovery container 13b corresponding to the second fiber debris transfer pipe 11b, a third fiber debris recovery container 13c corresponding to the third fiber debris transfer pipe 11c, and a fourth fiber debris recovery container 13d corresponding to the fourth fiber debris transfer pipe 11d. Furthermore, the cyclone separators 30 (30a to 30d) are provided with a first cyclone separator 30a disposed between the first fiber debris transfer pipe 11a and the first fiber debris recovery container 13a, a second cyclone separator 30b disposed between the second fiber debris transfer pipe 11b and the second fiber debris recovery container 13b, a third cyclone separator 30c disposed between the third fiber debris transfer pipe 11c and the third fiber debris recovery container 13c, and a fourth cyclone separator 30d disposed between the fourth fiber debris transfer pipe 11d and the fourth fiber debris recovery container 13d. The first fiber debris transfer pipe 11a to the fourth fiber debris transfer pipe 11d are each connected to the main body portion (without reference symbol) such that the longitudinal direction thereof is along the inner peripheral wall (without reference symbol) of the main body portion of the cyclone separator 30. That is, similar to the fiber debris transfer pipes 11 (11a to 11d) described above, when viewed from above, the first fiber debris transfer pipe 11a to the fourth fiber debris transfer pipe 11d are connected to the main body portion in such a manner as to be tangential to the cylindrical portion of the main body portion of the cyclone separator 30 (30a to 30d). Figure 5 In the same manner as the fiber debris transfer pipes 11 (11a to 11d) described above, when viewed from above, the first fiber debris transfer pipe 11a to the fourth fiber debris transfer pipe 11d are connected to the main body portion in such a manner as to be tangential to the cylindrical portion of the main body portion of the cyclone separator 30 (30a to 30d).

[0171] Even in the manner shown in the first modification example, the fiber debris can be appropriately separated from the air, the fiber debris can be discharged well from the fiber debris discharge portion 46 (refer to Figure 4 ), and the air from which the fiber debris has been separated can be discharged well from the air discharge portion 50 (refer to Figure 4 ).

[0172] (Second Modification Example)

[0173] Figure 15 It is a schematic diagram showing the fiber debris recovery device 1B of the second modification example. Refer to Figure 15 , in the manner of the second modification example, the fiber debris recovery device 1B includes a plurality of fiber debris transfer pipes 11 (11a to 11d), one fiber debris recovery container 13, and one cyclone separator 30.

[0174] The cyclone separator 30 is disposed between the plurality of fiber debris transfer pipes 11 (11a to 11d) and the fiber debris recovery container 13. The plurality of fiber debris transfer pipes 11 (11a to 11d) converge on the upstream side of the cyclone separator 30 and are connected to the main body portion in such a manner that the longitudinal direction of the converged pipe is along the inner peripheral wall (without reference symbol) of the main body portion of the cyclone separator 30. That is, similar to the referenceFigure 5 Similar to the described fiber debris transfer pipe 11, preferably, in a plan view, the merged pipe (without a reference symbol) is connected to the main body so as to be tangent to the cylindrical portion of the main body of the cyclone separator 30.

[0175] Even in the manner shown in the second modification example like this, fiber debris can be appropriately separated from the air, and the fiber debris can be discharged well from the fiber debris discharge portion 46 (refer to Figure 4 ), and the air from which the fiber debris has been separated can be discharged well from the air discharge portion 50 (refer to Figure 4 ).

[0176] In addition, in the manner of the second modification example, all of the plurality of fiber debris transfer pipes 11 (11a to 11d) converge on the upstream side of one cyclone separator 30. However, instead, a plurality of cyclone separators 30 may be provided, and two or more of the plurality of fiber debris transfer pipes 11 (11a to 11d) converge on the upstream side of the cyclone separator 30. For example, two fiber debris transfer pipes may converge on the upstream side of one cyclone separator and be connected to one cyclone separator in a converged state, and another two fiber debris transfer pipes may converge on the upstream side of another cyclone separator and be connected to another cyclone separator in a converged state.

[0177] (Third modification example)

[0178] Figure 16 is a plan view of the cyclone separator 30 of the third modification example. In Figure 16 , for convenience, the air discharge portion 50 is also shown. The fiber debris recovery device (without a reference symbol) of the third modification example is the same as the fiber debris recovery device 1B of the second modification example, and includes a plurality of fiber debris transfer pipes 11 (11a to 11d), one fiber debris recovery container (without a reference symbol), and one cyclone separator 30. In addition, in the second modification example, the plurality of fiber debris transfer pipes 11 (11a to 11d) converge on the upstream side of the cyclone separator 30. However, in the third modification example, instead, a plurality of fiber debris transfer pipes 11 (11a to 11d) may be connected to one cyclone separator 30.

[0179] Specifically, referring to Figure 16 , in the manner of the third modification example, the first fiber debris transfer pipe 11a, the second fiber debris transfer pipe 11b, the third fiber debris transfer pipe 11c, and the fourth fiber debris transfer pipe 11d are connected to positions on the main body 32 of one cyclone separator 30 that are circumferentially offset. The first fiber debris transfer pipe 11a to the fourth fiber debris transfer pipe 11d are all connected to the main body 32 such that the length direction is along the inner peripheral wall 35 of the main body 32 of the cyclone separator 30. That is, referring to Figure 5Similar to the described fiber debris transfer pipe 11, in a plan view, the first to fourth fiber debris transfer pipes 11a to 11d are connected to the main body 32 in such a way as to be tangent to the cylindrical portion 34 of the main body 32 of the cyclone separator 30. Even in the manner shown in this third modification example, fiber debris can be appropriately separated from the air, the fiber debris can be discharged well from the fiber debris discharge portion 46, and the air from which the fiber debris has been separated can be discharged well from the air discharge portion 50.

[0180] In addition, it is preferable that Figure 16 the first to fourth fiber debris transfer pipes 11a to 11d shown are all connected to the upper part of the main body 32. However, it is not necessary for all of the first to fourth fiber debris transfer pipes 11a to 11d to be located at the same position in the vertical direction, and a part or all of the first to fourth fiber debris transfer pipes 11a to 11d may also be connected in a staggered manner in the vertical direction.

[0181] (Fourth modification example)

[0182] Figure 17 is a perspective view of the cyclone separator 30 of the fourth modification example. In addition, in Figure 17 , for convenience, the air discharge portion 50 is also shown. The fiber debris recovery device (without reference numeral) of the fourth modification example is the same as the fiber debris recovery device 1B of the second modification example, and includes a plurality of fiber debris transfer pipes 11 (11a to 11d), one fiber debris recovery container (without reference numeral), and one cyclone separator 30.

[0183] Referring to Figure 17 , in the manner of the fourth modification example, the first fiber debris transfer pipe 11a, the second fiber debris transfer pipe 11b, the third fiber debris transfer pipe 11c, and the fourth fiber debris transfer pipe 11d are connected to positions of the main body 32 of one cyclone separator 30 that are staggered in the vertical direction. The first to fourth fiber debris transfer pipes 11a to 11d are all connected to the main body 32 in such a way that the longitudinal direction is along the inner peripheral wall 35 of the main body 32 of the cyclone separator 30. That is, similar to the fiber debris transfer pipe 11 described with reference to Figure 5 , in a plan view, the first to fourth fiber debris transfer pipes 11a to 11d are connected to the main body 32 in such a way as to be tangent to the cylindrical portion 34 of the main body 32 of the cyclone separator 30. Even in the manner shown in this fourth modification example, fiber debris can be appropriately separated from the air, the fiber debris can be discharged well from the fiber debris discharge portion 46, and the air from which the fiber debris has been separated can be discharged well from the air discharge portion 50.

[0184] In addition, Figure 17Although the first to fourth fiber debris transfer pipes 11a to 11d shown are all staggered from each other in the vertical direction and are connected to the main body 32 at the same position in the circumferential direction of the main body 32, this is not necessary. For example, at least one or all of the first to fourth fiber debris transfer pipes 11a to 11d may also be connected to the main body 32 at positions staggered in the circumferential direction of the main body 32.

[0185] (Fifth modification example)

[0186] Figures 18 - 21 Figs. showing the first to fourth modes of the exhaust sound suppressor of the fifth modification example. Figures 18 - 21 The exhaust sound suppressors shown all have the same outer fitting member 62 and shielding member 64 as Figure 8 the exhaust sound suppressor 60 shown, and the configuration of the deceleration section 65 is different from that of the exhaust sound suppressor 60. Therefore, hereinafter, only the configuration of the deceleration section 65 will be described.

[0187] Figure 18 The deceleration section 65A of the exhaust sound suppressor 60A of the first mode shown has Figure 8 a smaller number of corrugated members 651 than the deceleration section 65 of the exhaust sound suppressor 60 shown. That is, the axial length of the exhaust sound suppressor 60A is shorter than that of the exhaust sound suppressor 60, about 1 / 2. Specifically, when Figure 8 the axial length of the exhaust sound suppressor 60 shown is set to 220 cm to 230 cm, Figure 18 the length of the exhaust sound suppressor 60A shown is 110 cm to 115 cm.

[0188] Figure 19 The deceleration section 65B of the exhaust sound suppressor 60B of the second mode shown has a plurality of corrugated members 652 that protrude radially inward from the inner wall surface of the outer fitting member 62 toward the lower oblique direction. The plurality of corrugated members 652 are arranged at equal intervals along the axial direction. This deceleration section 65B is the same as the deceleration section 65 and the deceleration section 65A in that it allows the air flow to enter the gaps between the corrugated members 652, generates eddy currents, and disperses the air flow. Thereby, the air velocity is reduced. In addition, when viewed from the axial direction, the front end portions of the plurality of corrugated members 652 are located at positions radially outside the opening region 52 of the air discharge portion 50. That is, since the air passage for the air discharged from the opening region 52 of the air discharge portion 50 to the outside is ensured, the air from the air discharge portion 50 is discharged to the outside without being obstructed by the plurality of corrugated members 652. The axial length of this exhaust sound suppressor 60B is not particularly limited. In addition, in the second mode of the fifth modification example, the "between the corrugated members 652" corresponds to the "stagnation portion" of the present invention.

[0189] Figure 20 The deceleration part 65C of the exhaust sound suppressor 60C in the third mode shown has a plurality of honeycomb-shaped openings 653 formed on the inner wall surface of the outer fitting member 62. The number and formation positions of the openings 653 are not particularly limited. In this case, air flow is made to enter the openings 653, generating eddy currents to disperse the air flow. Thereby, the flow velocity of the air flowing toward the opening portion 621 can be decelerated, and a part of the air flowing toward the opening portion 621 can be retained or circulated in the honeycomb-shaped openings 653. Since the plurality of openings 653 do not protrude from the inner wall surface of the outer fitting member 62, even if the inner wall surface of the outer fitting member 62 is coplanar with the outer edge of the opening region 52 of the air discharge portion 50, the air passage in the outer fitting member 62 does not narrow. That is, since the air passage for the air discharged from the opening region 52 of the air discharge portion 50 to the outside is ensured, the air from the air discharge portion 50 is not blocked by a plurality of pleated members 652 as shown in Figure 19 and is discharged to the outside. The axial length of this exhaust sound suppressor 60C is not particularly limited. In addition, in the third mode of the fifth modification example, the above-mentioned "honeycomb-shaped opening 653" corresponds to the "retention portion" of the present invention.

[0190] Figure 21 The deceleration part 65D of the exhaust sound suppressor 60D in the fourth mode shown has a plurality of cube-shaped protrusions 654 provided on the inner wall surface of the outer fitting member 62. The number and formation positions of the protrusions 654 are not particularly limited. In this case, the air flowing in the outer fitting member 62 collides with the protrusions 654, and the air flow is dispersed. In addition, the dispersed air flow collides with the main air flow. Thereby, the flow velocity of the air is reduced. When viewed axially, the front end portions of the plurality of protrusions 654 are located at positions radially outside the opening region 52 of the air discharge portion 50. That is, since the air passage for the air discharged from the opening region 52 of the air discharge portion 50 to the outside is ensured, the air from the air discharge portion 50 is not blocked by a plurality of pleated members 652 as shown in Figure 19 and is discharged to the outside. In this case, the axial length of the exhaust sound suppressor 60D is not particularly limited.

[0191] Even for Figures 18 - 21 any one of the exhaust sound suppressors 60A to 60D, the air passage for the air discharged to the outside can be ensured and the flow velocity of the air can be decelerated, and thus the exhaust sound can be suppressed. Figure 22 is a diagram showing the results of tests conducted to confirm the suppression of exhaust sound by the exhaust sound suppressor. Figure 22 The vertical axis of Figure 22 is the sound pressure level (unit: dB). In addition, Figure 8 , Figures 18 - 21Regarding the symbol of the exhaust sound suppressor described in [reference], "none" indicates the case where the exhaust sound suppressor is not provided.

[0192] In addition, although not particularly illustrated, refer to Figure 8 and Figures 18 - 21 The exhaust sound suppressors 60, 60A to 60D described in [reference] have the deceleration parts 65, 65A to 65D provided on the inner wall surface of the outer fitting member 62, but are not limited thereto. For example, it may be configured such that the deceleration part is provided at a position overlapping the opening area 52 of the air discharge part 50 in the axial direction. For example, the exhaust sound suppressor may also be configured to have a columnar member extending in the axial direction above the central part (radial inner part) of the opening area 52, and the deceleration part is provided on the columnar member.

[0193] Furthermore, refer to Figure 8 and Figures 18 - 21 The outer fitting members 62 described in [reference] are all cylindrical, but are not limited thereto, and may also be square tube-shaped. In addition, the air passage of the outer fitting member 62 is linear, but is not limited thereto, and may also be a tubular shape having a bent part where the air passage is bent (for example, an S-shaped tubular shape). Since the deceleration part 65 is provided on the inner wall surface of the outer fitting member 62, even if the outer fitting member 62 is, for example, a tubular shape having a bent part, the flow velocity of the air flowing toward the outside is decelerated along the shape of the tubular shape. In addition, the air discharge part 50 is not limited to a cylindrical shape, and may be square tube-shaped or may have a bent part.

[0194] As Figure 22 shown, it can be confirmed that in any of the above exhaust sound suppressors 60, 60A to 60D, the sound pressure level decreases compared to the case where the exhaust sound suppressor is not provided, and by providing the exhaust sound suppressors 60, 60A to 60D, the exhaust sound can be suppressed. It can be confirmed that especially in the case where the exhaust sound suppressor 60 shown in Figure 8 is provided, it is the most effective.

[0195] (Other modification examples)

[0196] In the above-described embodiment, the example where the fiber debris recovery device 1 is provided in the false twisting machine 101 has been described, but it is not necessarily so. It is also possible to implement a mode in which the fiber debris recovery device 1 is provided in a fiber machine other than the false twisting machine 101. For example, it is also possible to implement a mode in which the fiber debris recovery device 1 is provided in a spinning device.

[0197] In the above-described embodiment, the example in which the false-twisting machine 101 is provided in four layers in the vertical direction on the winding device 107 has been described, but this is not necessarily the case. It is also possible to implement a configuration in which the false-twisting machine 101 is provided in three or fewer layers or five or more layers in the vertical direction on the winding device 107. In this case, it is also possible to provide the fiber dust transfer pipes 11 in a number corresponding to the number of layers of the winding device 107 arranged in the vertical direction.

[0198] In the above-described embodiment, the example in which a plurality of fiber dust transfer pipes 11 are provided has been described, but this is not necessarily the case. It is also possible to implement a configuration in which only one fiber dust transfer pipe 11 is provided.

[0199] In the above-described embodiment, the case where the air discharge portion 50 is cylindrical has been described, but the air discharge portion 50 only needs to be cylindrical and is not limited to a cylindrical shape. In the case where the air discharge portion is cylindrical but not cylindrical, it is preferable that the outer fitting member 62 is cylindrical and can be disposed on the radially outer side of the cylindrical air discharge portion. The same applies to the outer fitting member 62. In the case where the air discharge portion is cylindrical but not cylindrical, it is preferably cylindrical and can be disposed on the radially outer side of the cylindrical air discharge portion.

[0200] The embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The basic scope of the present disclosure is not represented by the above-described embodiments, but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

Claims

1. A fiber scrap recovery device, characterized in that: have: The fiber waste transfer pipe transfers the fiber waste including the waste yarn together with the air; A fiber scrap recovery unit that recovers fiber scraps transferred in the fiber scrap transfer pipe; as well as The cyclone separator is disposed between the fiber waste transfer pipe and the fiber waste recovery unit, separates the fiber waste transferred in the fiber waste transfer pipe from the air, and recovers the fiber waste separated from the air into the fiber waste recovery unit. The above cyclone separator has: A separation unit for separating the fiber scraps from the air; and An exhaust sound suppressor suppresses exhaust sound that may be generated by exhausting the air from which the lint is separated by the separation portion.

2. The fiber scrap recovery device according to claim 1, characterized in that: The exhaust sound suppressor is cylindrical and has a deceleration portion that decelerates the speed of air flowing toward the opening at one end opposite to the separation portion along the direction in which the air flows toward the opening at the one end.

3. The fiber scraps recovery device according to claim 2, characterized in that: The speed reducing portion includes an obstruction portion that obstructs the flow of air toward the opening at the one end.

4. The fiber scraps recovery device according to claim 2 or 3, characterized in that: The speed reducing portion includes a retaining portion that retains a portion of the air flowing toward the opening at the one end in the exhaust sound suppressor.

5. The fiber waste recovery device according to any one of claims 2 to 4, characterized in that: The exhaust sound suppressor has an inner wall surface, the cross section of which is orthogonal to the direction in which the air flows toward the opening at the one end and is larger than the air discharge port for discharging the air from the separation portion. The speed reduction portion is disposed on the inner wall surface.

6. The fiber scraps recovery device according to claim 5, characterized in that: The exhaust sound suppressor is configured such that an opening area of ​​the opening portion at the one end is equal to or larger than an opening area of ​​the air exhaust port.

7. The fiber scraps recovery device according to claim 6, characterized in that: The exhaust sound suppressor is in a straight or tapered cylindrical shape.

8. The fiber scrap recovery device according to any one of claims 2 to 7, characterized in that: The cyclone separator further includes a fiber waste discharge portion, which discharges the fiber waste that has moved downward along the inner peripheral wall of the separation portion into the fiber waste recovery portion together with air. The exhaust noise suppressor includes a shielding member that shields the yarn waste that is not discharged from the fiber waste discharge portion and moves toward the opening so that the yarn waste is not discharged to the outside through the opening.

9. The fiber scrap recovery device according to any one of claims 1 to 8, characterized in that: The above-mentioned emission sound suppressor suppresses the emission sound by 5 dB or more.

10. A false twisting machine, characterized in that: A fiber scrap collecting device according to any one of claims 1 to 9 is provided.

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