Waste yarn box

Abstract

The present invention suppresses noise.　In a waste yarn box 40, a partition 50 with a ventilation hole 50A is provided in a housing 42 and partitions the inside of the housing 42 into a waste yarn collection compartment 52 and an outlet compartment 54. In the housing 42 constituting the waste yarn collection compartment 52, an inflow cylinder 56 that allows a waste yarn Y2 to flow into the waste yarn collection compartment 52 is provided. In the housing 42 constituting the outlet compartment 54, an exhaust opening 58 that allows compressed air separated from the waste yarn Y2 to flow out is formed. The exhaust opening 58 is provided in a wall different from a left wall 42L constituting the outlet compartment 54. The inflow cylinder 56 is provided in a wall different from a right wall 42R constituting the waste yarn collection compartment 52. As a result, sound originating from suction sound is repeatedly reflected inside the waste yarn box 40, whereby the intensity of sound leaking through the exhaust opening 58 to the outside of the waste yarn box 40 can be reduced. Noise from the waste yarn box 40 can thus be suppressed.

Description

Waste yarn box

[0001] The present invention relates to a waste yarn box.

[0002] In the spinning apparatus described in Patent Document 1 below, an operator uses a suction device (suction gun) to guide a traveling yarn to a godet and a bobbin at a winding location. Specifically, the suction device is connected to a compressed air line for generating a suction flow, and the yarn is sucked into the suction device and guided to the godet and bobbin. When the spinning apparatus is in operation, the spun yarn is drawn out by the godet, stretched, and then wound onto a bobbin at a winding location. A waste pipe is also connected to the suction device, and the suction device is connected to a waste container (waste yarn box) via the waste pipe. As a result, the waste yarn in the suction device is sent to the waste container together with compressed air.

[0003] Special Publication No. 2020-502381

[0004] In the spinning machine, as described above, the waste yarn in the suction device is sent to the waste container together with compressed air and collected in the waste container. At this time, there is a problem that the sound generated by the suction operation of the suction device is transmitted to the waste container, and noise caused by the suction operation is generated in the waste container. For this reason, it is desirable that the waste container (waste yarn box) for collecting the waste yarn has a structure that suppresses noise.

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a waste yarn box capable of suppressing noise.

[0006] One or more embodiments of the present invention are a waste yarn box that collects waste yarn sucked by a suction section, comprising: a housing formed in the shape of a hollow box; a partition wall that divides the interior of the housing into an inlet chamber and an outlet chamber, and has a plurality of air vents penetrating in the thickness direction of the plate, thereby preventing the waste yarn from passing through; an inlet section that is provided in the housing that constitutes the inlet chamber, and through which the waste yarn flows into the interior of the inlet chamber; and an outlet section that is provided in the housing that constitutes the outlet chamber, and through which air separated from the waste yarn flows out of the outlet chamber, wherein the inlet section and the outlet section are provided in a wall section of the housing that is different from the wall section that faces the partition wall in the thickness direction of the plate, and the interior of the waste yarn box is a closed space other than the inlet section and the outlet section.

[0007] In the waste yarn box of the above configuration, a partition wall with an air vent is provided inside the housing, and the partition wall divides the interior of the housing into an inlet chamber and an outlet chamber. The housing that forms the inlet chamber is provided with an inlet section that allows waste yarn to flow into the inlet chamber, and the housing that forms the outlet chamber is formed with an outlet section that allows air separated from the waste yarn to flow out. Furthermore, the inlet section and the outlet section are provided on a wall section of the housing that is different from the wall section that faces the partition wall in the plate thickness direction. As a result, sound propagated from the suction section to the waste yarn box is repeatedly reflected within the waste yarn box, thereby reducing the intensity of sound leaking from the outlet section to the outside of the waste yarn box. Therefore, noise from the waste yarn box can be suppressed.

[0008] One or more embodiments of the present invention are directed to a waste yarn box in which the partition walls are arranged with their thickness direction perpendicular to the vertical direction.

[0009] In the waste yarn box of the above configuration, the partition is arranged with its thickness direction perpendicular to the vertical direction, so that the partition divides the interior of the housing in a direction perpendicular to the vertical direction. As a result, the bottom wall of the housing forms the bottom wall of the inlet chamber, so that, for example, waste yarn flowing into the inlet chamber can be efficiently stored on the bottom wall of the housing. Therefore, the partition can be installed inside the waste yarn box without impeding the waste yarn collection function of the waste yarn box.

[0010] In one or more embodiments of the present invention, the outlet is provided in the bottom wall of the housing.

[0011] In the waste yarn box of the above configuration, the outlet section is provided on the bottom wall of the housing, so that sound from inside the outlet chamber can be released from the outlet section into the space below the waste yarn box. As a result, when the housing is installed on the floor, etc., sound from inside the outlet chamber can be released from the bottom wall of the waste yarn box, which is generally located below the worker's head, toward the opposite side of the worker's head. Therefore, the noise from the waste yarn box can be further suppressed.

[0012] One or more embodiments of the present invention are directed to a waste yarn box in which the opening area of ​​the outlet is set to be equal to or larger than the opening area of ​​the inlet.

[0013] In the waste yarn box having the above configuration, the opening area of ​​the outlet is set to be equal to or larger than the opening area of ​​the inlet, so that, compared to when the opening area of ​​the outlet is set smaller than the opening area of ​​the inlet, an increase in air resistance of the air flowing into the waste yarn box from the inlet and exhausted from the outlet can be suppressed. This allows the air separated from the waste yarn by the partition to be efficiently exhausted from the outlet.

[0014] One or more embodiments of the present invention are waste yarn boxes in which the housing is formed in a rectangular box shape, the partition is formed in a rectangular plate shape, a pair of partitions are provided inside the housing at a distance in the plate thickness direction, the pair of partitions divide the inside of the housing into the inlet chamber and a pair of outlet chambers, and the inlet chamber is located between the pair of outlet chambers.

[0015] In the waste yarn box having the above-described configuration, a pair of partition walls are provided inside the housing, which divide the inside of the housing into an inlet chamber and a pair of outlet chambers, and the inlet chamber is located between the pair of outlet chambers. This allows sound leaking from the outlet of the outlet chamber to be dispersed, thereby more effectively suppressing noise from the waste yarn box.

[0016] One or more embodiments of the present invention are waste yarn boxes in which sound absorbing members are provided in at least one of the entrance chamber and the exit chamber.

[0017] In the waste yarn box having the above-described configuration, the sound-absorbing member is provided in at least one of the inlet chamber and the outlet chamber, so that the sound inside the housing can be absorbed by the sound-absorbing member, thereby further reducing the intensity of the sound leaking out of the waste yarn box from the outlet.

[0018] One or more embodiments of the present invention are directed to a waste yarn box in which the sound absorbing member is positioned so as not to block the inlet and outlet.

[0019] In the waste yarn box of the above configuration, the sound-absorbing material is positioned in a position that does not block the inlet and outlet sections, thereby preventing the flow of waste yarn from the inlet section into the entrance chamber from being obstructed and preventing the exhaust of air from the outlet section from being obstructed.

[0020] One or more embodiments of the present invention are waste yarn boxes in which the sound-absorbing member covers the inner surface of a wall portion in the housing that faces the partition wall in the thickness direction and is arranged adjacent to the inner surface.

[0021] In the waste yarn box of the above configuration, the sound-absorbing material is arranged adjacent to the inner surface of the wall portion that faces the partition wall in the housing in the thickness direction, thereby suppressing a reduction in the volume of the inlet chamber or outlet chamber.

[0022] One or more embodiments of the present invention are waste yarn boxes in which the sound-absorbing member covers the inner surface of a wall portion in the housing that faces the partition wall in the thickness direction and is positioned at a distance from the inner surface.

[0023] In one or more embodiments of the present invention, the sound-absorbing member is disposed at a distance from the inner circumferential surface of the wall portion of the housing that faces the partition wall in the thickness direction, thereby forming an air layer between the wall portion and the sound-absorbing member. This allows the sound-absorbing band of the sound-absorbing member to be expanded to a low-frequency band for sounds generated in the waste yarn box, thereby further enhancing the sound-absorbing effect of the sound-absorbing member.

[0024] According to one or more embodiments of the present invention, noise can be suppressed.

[0025] 5 is a schematic diagram showing a spinning system to which a waste yarn box according to a first embodiment is applied. FIG. 1 is a plan view of the waste yarn box shown in FIG. 1 as seen from above. FIG. 2 is a cross-sectional view (cross-sectional view along line 3-3 in FIG. 2) showing the interior of the waste yarn box as seen from the front. FIG. 3 is a cross-sectional view corresponding to FIG. 3 showing the interior of a waste yarn box of a comparative example. FIG. 5 is a plan view of the waste yarn box according to a second embodiment. FIG. 6 is a cross-sectional view (cross-sectional view along line 6-6 in FIG. 5) showing the interior of the waste yarn box as seen from the front. FIG. 6 is a cross-sectional view corresponding to FIG. 3 showing a modified example of the waste yarn box according to the first embodiment. (A) is a plan view showing a modified example of the partition wall in the waste yarn box according to the first embodiment, and (B) is a plan view showing another modified example of the housing and partition wall in the waste yarn box according to the first embodiment.

[0026] 1 to 3, a waste yarn box 40 according to a first embodiment will be described. The waste yarn box 40 constitutes a part of the spun yarn take-up device 22 in the spinning system 10. The spinning system 10 will be described first, and then the waste yarn box 40 will be described.

[0027] (Spinning System 10) As shown in Fig. 1, the spinning system 10 is configured as a system device for producing fully drawn yarn (FDY). The spinning system 10 includes a spinning device 12 and a yarn take-up device 22. In the spinning device 12, molten raw material is sent from an extruder 14 to a gear pump 16, and the raw material pressurized by the gear pump 16 is extruded from a head 18, whereby a plurality of spun yarns Y1 are drawn from the spinning device 12. The plurality of spun yarns Y1 drawn from the spinning device 12 are drawn by a drawing device 20 and sent to the yarn take-up device 22.

[0028] The yarn take-up device 22 has a guide mechanism 24 and a winding unit 26, and a bobbin 28 is attached to the winding unit 26. The yarn Y1 drawn out from the drawing device 20 is wound around the guide mechanism 24 and the bobbin 28 by a suction gun 30 serving as a suction unit, and the yarn take-up device 22 is operated so that the yarn Y1 that has passed through the guide mechanism 24 is wound around the bobbin 28.

[0029] The suction gun 30 is configured as a well-known yarn suction unit, and sucks and holds the spun yarn Y1 during the threading operation in which the spun yarn Y1 is wound around the guide mechanism 24 and the bobbin 28. That is, a compressed air supply unit 32 is connected to the suction gun 30, and compressed air is supplied from the compressed air supply unit 32 to the suction gun 30, thereby sucking and holding the spun yarn Y1 through an air intake port provided at the tip of the suction gun 30. Furthermore, the suction gun 30 is connected to a waste yarn box 40 by a hose 34. After the threading operation by the suction gun 30 is completed, the spun yarn Y1 is cut by a cutter, and the spun yarn Y1 in the suction gun 30 is sent to the waste yarn box 40 by compressed air as waste yarn Y2, and is collected in the waste yarn box 40.

[0030] (Regarding the waste yarn box 40) Next, the waste yarn box 40 will be described with reference to Figures 2 and 3. Note that the arrows UP, FR, and RH shown as appropriate in Figures 2 and 3 indicate the upper side, front side, and right side of the waste yarn box 40, respectively. In the following description, when the up-down, front-rear, and left-right directions are used, they refer to the up-down, front-rear, and left-right directions of the waste yarn box 40 unless otherwise specified.

[0031] The waste yarn box 40 includes a housing 42 that forms the outer shell of the waste yarn box 40 , and a partition wall 50 provided inside the housing 42 .

[0032] The housing 42 is formed in the shape of a hollow, approximately rectangular parallelepiped box. Four casters 44 are provided on the underside of the housing 42, and the casters 44 are provided near the four corners of the bottom wall 42D of the housing 42. Each caster 44 has a roller 46, and the roller 46 is configured to be rotatable with the left-right direction as its axial direction. The casters 44 are placed on an installation portion such as a floor, and the housing 42 (waste yarn box 40) is installed.

[0033] The partition 50 is formed in a substantially rectangular plate shape with its thickness extending in the left-right direction. The partition 50 is provided at the left end portion of the housing 42, and the outer periphery of the partition 50 is fixed to the inner periphery of the housing 42. As a result, the interior of the housing 42 is divided in the left-right direction by the partition 50. Specifically, the portion of the housing 42 to the right of the partition 50 is configured as a waste yarn collecting chamber 52 serving as an inlet chamber, and the portion of the housing 42 to the left of the partition 50 is configured as an outlet chamber 54.

[0034] An inlet tube portion 56 serving as an inlet is provided on the upper wall 42U constituting the waste yarn collecting chamber 52 of the housing 42. That is, the inlet tube portion 56 is provided on a wall portion different from the right wall 42R of the housing 42 that faces the partition wall 50 in the left-right direction (thickness direction of the partition wall 50). The inlet tube portion 56 is formed in a substantially cylindrical shape with its axial direction extending in the up-down direction, and protrudes upward from the upper wall 42U. The tip of the hose 34 extending from the suction gun 30 is connected to the inlet tube portion 56. As a result, the waste yarn Y2 sent from the suction gun 30 flows into the waste yarn collecting chamber 52 together with compressed air.

[0035] A plurality of circular ventilation holes 50A are formed through the partition 50. As a result, the interior of the waste yarn collecting chamber 52 and the interior of the outlet chamber 54 are in communication with each other via the ventilation holes 50A. The ventilation holes 50A are arranged at predetermined intervals in the up-down and front-rear directions of the partition 50. The diameter of the ventilation holes 50A is set so that the waste yarn Y2 that has flowed into the waste yarn collecting chamber 52 does not flow out toward the outlet chamber 54. In other words, the partition 50 is configured as a wall that separates the compressed air and the waste yarn Y2 that have flowed into the waste yarn collecting chamber 52 and allows the separated air to pass toward the outlet chamber 54.

[0036] An exhaust port 58 serving as an outlet portion is formed through the lower wall 42D that constitutes the outlet chamber 54 of the housing 42. That is, the exhaust port 58 is provided in a wall portion different from the left wall 42L of the housing 42 that faces the partition wall 50 in the left-right direction (the thickness direction of the partition wall 50). The opening area of ​​the exhaust port 58 is set to be equal to or larger than the opening area of ​​the inlet cylindrical portion 56. The compressed air that flows out into the outlet chamber 54 is exhausted from the exhaust port 58 to the outside of the housing 42.

[0037] Furthermore, the housing 42 does not have any openings other than the inlet cylindrical portion 56 and the exhaust port 58. In other words, the interior of the housing 42 is a closed space except for the inlet cylindrical portion 56 and the exhaust port 58.

[0038] (Operation and Effect) Next, the operation and effect of this embodiment will be described.

[0039] In the waste yarn box 40 configured as described above, the tip of the hose 34 extending from the suction gun 30 is connected to the inlet tube portion 56. As a result, the waste yarn Y2 sucked by the suction gun 30 flows into the waste yarn collection chamber 52 of the waste yarn box 40 together with the compressed air, and is collected in the waste yarn collection chamber 52 (see FIG. 3). The compressed air that flows into the waste yarn collection chamber 52 passes through the ventilation hole 50A of the partition wall 50 and flows into the outlet chamber 54. At this time, the size of the ventilation hole 50A prevents the waste yarn Y2 from passing through the ventilation hole 50A. The compressed air that flows into the outlet chamber 54 flows out of the waste yarn box 40 through the exhaust port 58. As a result, the compressed air that flows into the waste yarn box 40 and the waste yarn Y2 are separated by the waste yarn box 40, and the waste yarn Y2 can be collected in the waste yarn box 40.

[0040] Incidentally, the suction gun 30 sucks in the waste yarn Y2 using the supplied compressed air, and sends the sucked waste yarn Y2 to the inlet tube portion 56 of the waste yarn box 40 through the hose 34, and the waste yarn Y2 flows from the inlet tube portion 56 into the waste yarn box 40. As a result, sound generated by the suction operation of the suction gun 30 (hereinafter, this sound will be referred to as suction sound) is propagated from the inlet tube portion 56 to the waste yarn box 40, and sound (noise) due to the suction sound may be generated inside the waste yarn box 40.

[0041] Here, in the waste yarn box 40, a partition 50 having an air vent 50A is provided within the housing 42, and the partition 50 divides the interior of the housing 42 into a waste yarn collecting chamber 52 and an outlet chamber 54. The housing 42 that constitutes the waste yarn collecting chamber 52 is provided with an inlet tube 56 that allows the waste yarn Y2 to flow into the waste yarn collecting chamber 52, and the housing 42 that constitutes the outlet chamber 54 is formed with an exhaust port 58 that allows the compressed air separated from the waste yarn Y2 to flow out. The exhaust port 58 is provided in a wall section of the housing 42 that is different from the left wall 42L that constitutes the outlet chamber 54, and the inlet tube 56 is provided in a wall section of the housing 42 that is different from the right wall 42R that constitutes the waste yarn collecting chamber 52. As a result, sound caused by suction noise is repeatedly reflected within the waste yarn box 40, so the intensity of sound leaking out of the waste yarn box 40 from the exhaust port 58 can be reduced. Therefore, noise from the waste yarn box 40 can be suppressed.

[0042] This point will be explained below in comparison with a waste yarn box 100 of a comparative example shown in Figure 4. The configuration of the waste yarn box 100 of the comparative example will be explained first. The waste yarn box 100 is configured similarly to the waste yarn box 40 of the first embodiment, except for the following points. Note that in Figure 4, parts configured similarly to the waste yarn box 40 of the first embodiment are given the same reference numerals. The waste yarn box 100 does not have the partition wall 50 of the waste yarn box 40 of this embodiment, and the interior of the housing 42 is composed only of a waste yarn collection chamber 52. Furthermore, the waste yarn box 100 of the comparative example does not have an exhaust port 58 in the housing 42, and instead has air vents 50A formed in the right wall 42R and left wall 42L of the housing 42 to separate the waste yarn Y2 from the compressed air and to exhaust the compressed air to the outside of the waste yarn box 100. Therefore, in the waste yarn box 100 of the comparative example, the sound caused by the suction sound generated inside the waste yarn box 100 leaks directly to the outside of the waste yarn box 100 through the ventilation holes 50A formed in the housing 42 (see the arrows shown in FIG. 4 ). As a result, the intensity of the sound leaking to the outside of the waste yarn box 100 becomes relatively large, and there is a possibility that noise caused by the suction sound will be generated in the waste yarn box 100.

[0043] In contrast to this, in the waste yarn box 40 of the first embodiment, a partition 50 having an air vent 50A is provided inside the housing 42, and the partition 50 divides the inside of the housing 42 into a waste yarn collecting chamber 52 and an outlet chamber 54. As a result, the partition 50 separates the compressed air from the waste yarn Y2, and allows the compressed air to flow toward the outlet chamber 54 while collecting the waste yarn Y2 in the waste yarn collecting chamber 52. The air flowing into the outlet chamber 54 can then be exhausted from the exhaust port 58.

[0044] Furthermore, in the waste yarn box 40, sound caused by suction sound generated in the waste yarn collecting chamber 52 leaks from the vent hole 50A of the partition 50 to the outlet chamber 54, and the sound leaked into the outlet chamber 54 is reflected by the inner circumferential surface of the outlet chamber 54. In particular, sound reflected by the left wall 42L of the outlet chamber 54 leaks from the vent hole 50A of the partition 50 into the waste yarn collecting chamber 52, and the sound leaked into the waste yarn collecting chamber 52 is reflected by the inner circumferential surface of the waste yarn collecting chamber 52. Furthermore, sound reflected by the right wall 42R of the outlet chamber 54 leaks from the vent hole 50A of the partition 50 into the outlet chamber 54. In this way, in the waste yarn box 40, when sound caused by suction sound propagated from the suction gun 30 to the inlet tube portion 56 is generated inside the waste yarn box 40, the sound is repeatedly reflected between the left wall 42L and the right wall 42R of the waste yarn box 40 (see arrows shown in FIG. 3 ). This increases the distance that sound generated within the waste yarn box 40 reaches the exhaust port 58. Furthermore, sound within the waste yarn box 40 is repeatedly reflected by the left wall 42L and right wall 42R of the waste yarn box 40, thereby increasing the amount of sound transmitted through the housing 42. As a result, the intensity of sound leaking from the exhaust port 58 to the outside of the waste yarn box 40 can be reduced compared to the waste yarn box 100 of the comparative example. Therefore, the waste yarn box 40 of the first embodiment can suppress noise caused by suction sound.

[0045] As described above, the exhaust port 58 and the inlet tube portion 56 are provided in a wall portion different from the wall portions located on both sides of the partition 50 in the thickness direction of the waste yarn box 40. In other words, the exhaust port 58 and the inlet tube portion 56 are provided in a wall portion different from the left wall 42L and the right wall 42R, which function as reflective walls that mainly reflect sound toward the waste yarn collecting chamber 52 or the outlet chamber 54. This allows sound generated inside the waste yarn box 40 to be effectively reflected by the left wall 42L and the right wall 42R, and also prevents sound that has passed through the ventilation hole 50A of the partition 50 from directly leaking out from the exhaust port 58.

[0046] The partition 50 is formed in a substantially rectangular plate shape with its thickness in the left-right direction, and the partition 50 divides the interior of the housing 42 in the left-right direction. As a result, the bottom wall 42D of the housing 42 forms the bottom wall of the waste yarn collecting chamber 52, so that, for example, the waste yarn Y2 flowing into the waste yarn collecting chamber 52 can be efficiently stored on the bottom wall 42D. Therefore, the partition 50 can be provided inside the waste yarn box 40 without impeding the waste yarn Y2 collection function of the waste yarn box 40.

[0047] The exhaust port 58 is provided in the bottom wall 42D that constitutes the outlet chamber 54 of the housing 42. This allows sound from inside the outlet chamber 54 to leak out from the exhaust port 58 toward the space below (the installation surface side of) the waste yarn box 40. This allows sound from inside the outlet chamber 54 to leak out from the bottom wall 42D of the waste yarn box 40, which is generally located below the operator's head, toward the opposite side of the operator's head. This further reduces noise from the waste yarn box 40.

[0048] In addition, the opening area of ​​the exhaust port 58 is set to be equal to or larger than the opening area of ​​the inlet tube portion 56. Therefore, for example, compared to when the opening area of ​​the exhaust port 58 is set to be smaller than the opening area of ​​the inlet tube portion 56, it is possible to suppress an increase in air resistance of the compressed air that flows from the inlet tube portion 56 into the waste yarn box 40 and is exhausted from the exhaust port 58. This allows the compressed air separated from the waste yarn Y2 by the partition wall 50 to be efficiently exhausted from the exhaust port 58.

[0049] Second Embodiment Next, a waste yarn box 200 according to a second embodiment will be described with reference to Figures 5 and 6. The waste yarn box 200 according to the second embodiment is configured similarly to the waste yarn box 40 according to the first embodiment, except for the following points. In Figures 5 and 6, parts configured similarly to the waste yarn box 40 according to the first embodiment are denoted by the same reference numerals.

[0050] That is, in the waste yarn box 200, sound-absorbing members 202 are provided in the waste yarn collection chamber 52 and the outlet chamber 54 of the housing 42. The sound-absorbing members 202 are formed in a generally rectangular plate shape with the thickness direction in the left-right direction. The sound-absorbing member 202 in the waste yarn collection chamber 52 is disposed adjacent to the right wall 42R of the housing 42, and the sound-absorbing member 202 in the outlet chamber 54 is disposed adjacent to the left wall 42L of the housing 42. This prevents excessive reduction in the volume of the waste yarn collection chamber 52 and the outlet chamber 54 even when the sound-absorbing members 202 are provided in the waste yarn collection chamber 52 and the outlet chamber 54. The size of the sound-absorbing member 202 when viewed from the left-right direction is set so that the sound-absorbing member 202 covers substantially the entire inner circumferential surfaces of the right wall 42R and the left wall 42L. Furthermore, in the outlet chamber 54, the exhaust port 58 is located to the right of the sound absorbing member 202 in the outlet chamber 54 so that the sound absorbing member 202 does not block the exhaust port 58. As a result, even if the sound absorbing member 202 is provided in the outlet chamber 54, it is configured so as not to hinder the exhaust of compressed air from the exhaust port 58. Furthermore, in the waste yarn collecting chamber 52, the sound absorbing member 202 is located at a position so as not to block the inflow tube portion 56. As a result, even if the sound absorbing member 202 is provided in the waste yarn collecting chamber 52, it is configured so as not to hinder the inflow of the waste yarn Y2 from the inflow tube portion 56.

[0051] The sound absorbing member 202 is made of a porous material with open cells, such as glass wool or rock wool, so that the vibrations of sound waves that penetrate into the sound absorbing member 202 are converted into thermal energy by the sound absorbing member 202, thereby attenuating the sound inside the housing 42.

[0052] In the waste yarn box 200 of the second embodiment, as in the first embodiment, the interior of the housing 42 is divided by the partition wall 50 into a waste yarn collection chamber 52 and an outlet chamber 54. Therefore, as in the first embodiment, in the waste yarn box 200, sound caused by suction sound propagated from the suction gun 30 to the inlet tube portion 56 is repeatedly reflected between the left wall 42L and the right wall 42R within the waste yarn box 40. This increases the distance that sound generated in the waste yarn box 40 reaches the exhaust port 58, thereby increasing the amount of sound transmitted through the housing 42. Therefore, in the second embodiment, noise in the waste yarn box 200 caused by suction sound can be suppressed.

[0053] Moreover, in the second embodiment, as described above, the sound absorbing members 202 are provided in each of the waste yarn collecting chamber 52 and the outlet chamber 54 of the waste yarn box 200. Specifically, the sound absorbing members 202 are disposed adjacent to the right wall 42R and the left wall 42L of the housing 42 so as to cover the inner peripheral surfaces of the right wall 42R and the left wall 42L. This allows the sound absorbing members 202 to absorb the sound inside the housing 42 caused by the suction sound propagating from the suction gun 30 to the inlet tube portion 56. This further reduces the intensity of the sound leaking out of the waste yarn box 200 from the exhaust port 58. This effectively suppresses the noise inside the waste yarn box 200 caused by the suction sound.

[0054] In the second embodiment, the sound absorbing members 202 are provided in both the waste yarn collecting chamber 52 and the outlet chamber 54 of the waste yarn box 200, but the sound absorbing members 202 may be provided in either the waste yarn collecting chamber 52 or the outlet chamber 54. In this case, too, the sound absorbing members 202 can absorb the sound caused by suction in the waste yarn box 200. Furthermore, providing the sound absorbing members 202 in either the waste yarn collecting chamber 52 or the outlet chamber 54 can contribute to reducing the cost of the waste yarn box 200.

[0055] Furthermore, in the second embodiment, the sound-absorbing member 202 is disposed adjacent to the inner circumferential surfaces of the right wall 42R and the left wall 42L of the housing 42, but the sound-absorbing member 202 may also be disposed away from the right wall 42R and the left wall 42L. That is, the position of the sound-absorbing member 202 may be changed so that an air layer is formed between the right wall 42R and the left wall 42L and the sound-absorbing member 202. This allows the sound absorption band of the sound-absorbing member 202 to be expanded to a low-frequency band for sounds generated in the waste yarn box 200 due to suction noise. As a result, the sound-absorbing effect of the sound-absorbing member 202 can be further enhanced.

[0056] Furthermore, in the waste yarn boxes 40 and 200 of the first and second embodiments, one partition 50 is provided in the housing 42 to divide the inside of the housing 42 into the waste yarn collecting chamber 52 and the outlet chamber 54, but a pair of partitions 50 may be provided in the housing 42 to divide the inside of the housing 42 by the pair of partitions 50. Below, an example in which a pair of partitions 50 is provided in the waste yarn box 40 of the first embodiment will be described as a modified example of the waste yarn box 40 using Figure 7.

[0057] As shown in this figure, in this modified example of the waste yarn box 40, partition walls 50 are provided on both the left and right sides of the housing 42. The area between the pair of partition walls 50 in the housing 42 is configured as a waste yarn collecting chamber 52, and the areas on both left and right sides of the waste yarn collecting chamber 52 in the housing 42 are configured as outlet chambers 54. Exhaust ports 58 are formed in the bottom wall 42D of the housing 42 that form the outlet chambers 54. That is, two exhaust ports 58 are formed in the bottom wall 42D of the waste yarn box 40. The total opening area of ​​the two exhaust ports 58 is set to be equal to or greater than the opening area of ​​the inlet tube portion 56.

[0058] Furthermore, in the modified waste yarn box 40, sound caused by suction sound propagating from the suction gun 30 to the inlet tube portion 56 is repeatedly reflected between the left wall 42L and the right wall 42R inside the waste yarn box 40. This increases the distance that sound generated inside the waste yarn box 40 reaches the exhaust port 58, thereby increasing the amount of sound transmitted through the housing 42. Therefore, in the modified waste yarn box 40, the intensity of sound leaking from the exhaust port 58 to the outside of the waste yarn box 40 can be reduced.

[0059] Furthermore, in the modified waste yarn box 40, two exhaust ports 58 are formed in the bottom wall 42D of the housing 42, and the total opening area of ​​the two exhaust ports 58 is set to be equal to or greater than the opening area of ​​the inlet tube portion 56. Therefore, in the modified waste yarn box 40, the opening area of ​​the exhaust ports 58 can be set smaller than in the first embodiment, and the exhaust ports 58 can be arranged in a dispersed manner. This allows sound leaking from the bottom wall 42D of the housing 42 to be dispersed in the space below the waste yarn box 40. Therefore, noise from the waste yarn box 40 can be suppressed more effectively.

[0060] Furthermore, in the waste yarn boxes 40, 200 of the first and second embodiments, the inlet tube portion 56 is provided in the upper wall 42U of the housing 42 and the exhaust port 58 is provided in the lower wall 42D of the housing 42, but the positions of the inlet tube portion 56 and the exhaust port 58 are not limited to this. For example, the inlet tube portion 56 and the exhaust port 58 may be provided in the front wall or the rear wall of the housing 42. That is, the inlet tube portion 56 and the exhaust port 58 may be provided in a wall portion different from the left wall 42L and the right wall 42R of the housing 42.

[0061] In the waste yarn boxes 40 and 200 of the first and second embodiments, the partition wall 50 is formed in a generally rectangular plate shape with the left-right direction as the plate thickness direction, and divides the interior of the housing 42 into the waste yarn collecting chamber 52 and the outlet chamber 54, but the shape of the partition wall 50 is not limited to this. For example, as shown in Fig. 8(A), the partition wall 50 may be formed in a rectangular cylindrical shape with the vertical direction as the axial direction, and divide the interior of the housing 42 into the waste yarn collecting chamber 52 and the outlet chamber 54. In addition, when the partition wall 50 is formed in a cylindrical shape, for example, as shown in Fig. 8(B), the housing 42 may be formed in a hollow cylindrical box shape, and the partition wall 50 may be formed in a cylindrical shape with the vertical direction as the axial direction. Even if the housing 42 and the partition 50 are configured in this manner, as in the first and second embodiments, the waste yarn Y2 can be collected in the waste yarn collection chamber 52, and the sound inside the housing 42 can be reflected by the inner surface of the outer wall of the housing 42, thereby increasing the propagation distance of the sound inside the housing 42.

[0062] Furthermore, although the waste yarn boxes 40, 200 of the first and second embodiments are applied to a system device for producing FDY, the waste yarn boxes 40, 200 may also be applied to a system device for producing partially oriented yarn (POY) or a system device for producing drawn textured yarn (DTY) by false twisting POY.

[0063] The suction gun 30 used in the spinning system 10 may be operated by an operator or may constitute a threading robot.

[0064] 22 Spinning yarn take-up device 30 Suction gun (suction part) 40 Waste yarn box 42 Housing 42D Lower wall 50 Partition wall 50A Ventilation hole 52 Waste yarn collection chamber (inlet chamber) 54 Outlet chamber 56 Inlet tube part (inlet part) 58 Exhaust port (outlet part) 200 Waste yarn box 202 Sound absorbing member Y1 Spinning Y2 Waste yarn

Claims

1. A waste yarn box for collecting waste yarn sucked by a suction section, comprising: a housing formed in a hollow box shape; a partition wall dividing the inside of the housing into an inlet chamber and an outlet chamber, and having a plurality of air holes penetrating in the thickness direction of the plate, which prevents the waste yarn from passing through; an inlet section provided in the housing constituting the inlet chamber, through which the waste yarn flows into the inside of the inlet chamber; and an outlet section provided in the housing constituting the outlet chamber, through which air separated from the waste yarn flows out of the outlet chamber, wherein the inlet section and the outlet section are provided in a wall section of the housing other than the wall section facing the partition wall in the thickness direction of the plate, and the inside of the housing is a closed space other than the inlet section and the outlet section.

2. The waste yarn box according to claim 1, wherein the partition is arranged with its thickness direction perpendicular to the vertical direction.

3. The waste yarn box according to claim 2, wherein the outlet is provided on the bottom wall of the housing.

4. A waste yarn box as described in any one of claims 1 to 3, wherein the opening area of ​​the outlet portion is set to be greater than or equal to the opening area of ​​the inlet portion.

5. A waste yarn box as described in any one of claims 1 to 4, wherein the housing is formed in a rectangular box shape, the partition wall is formed in a rectangular plate shape, a pair of the partition walls are provided inside the housing spaced apart in the plate thickness direction, and the pair of partition walls divide the inside of the housing into the entrance chamber and a pair of the exit chambers, and the entrance chamber is located between the pair of the exit chambers.

6. A waste yarn box as claimed in any one of claims 1 to 5, wherein a sound absorbing member is provided in at least one of the inlet chamber and the outlet chamber.

7. A waste yarn box as claimed in claim 6, wherein said sound absorbing member is arranged at a position that does not block said inlet and outlet portions.

8. A waste yarn box as described in claim 6 or claim 7, wherein the sound-absorbing material covers the inner surface of a wall portion that faces the partition in the thickness direction of the housing and is positioned adjacent to the inner surface.

9. A waste yarn box as described in claim 6 or claim 7, wherein the sound-absorbing material covers the inner surface of a wall portion that faces the partition in the thickness direction of the housing and is positioned at a distance from the inner surface.