EP4663824A1

EP4663824A1 - Waste yarn box

Info

Publication number: EP4663824A1
Application number: EP23921310.1A
Authority: EP
Inventors: Takehisa Inoue
Original assignee: TMT Machinery Inc
Current assignee: TMT Machinery Inc
Priority date: 2023-02-06
Filing date: 2023-11-21
Publication date: 2025-12-17
Also published as: TW202432921A; JPWO2024166489A1; CN120530236A; WO2024166489A1

Abstract

The invention suppresses a noise. A waste yarn box includes a housing divided by a partition wall with a ventilation hole, forming two chambers: a waste yarn collection chamber and an outlet chamber. The waste yarn enters the housing configuring the waste yearn collection chamber through an inlet cylinder, while compressed air which is separated from the yarn flows out through an exhaust outlet formed in the housing configuring the outlet chamber. To enhance noise reduction, the exhaust outlet and inlet cylinder are provided on wall portions different from the left and right walls of their respective chambers. This allows a sound caused by a suction sound to be reflected repeatedly in the waste yarn box, thereby reducing an intensity of the sound leaking out of the exhaust outlet to the outside of the waste yarn box. Thus, the noise of the waste yarn box can be suppressed.

Description

[Technical Field]

The disclosure relates to a waste yarn box.

[Background Art]

In a spinning device described in patent literature 1 below, an operator guides a running yarn to a godet and a bobbin at a winding point by means of a suction device (suction gun). Specifically, the suction device is connected to a compressed air pipeline for generating a suction flow, which guides the yarn into the suction device and into the godet and the bobbin. When the spinning device is in operation, a spun yarn is drawn out by the godet and, after drawing, wound onto the bobbin at the winding point. A waste pipeline is connected to the suction device, and the suction device is connected to a waste container (waste yarn box) via the waste pipeline. This causes a waste yarn in the suction device to be sent with compressed air to the waste container.

[Related Art Documents]

[Patent Literature]

Patent Literature 1: Japanese Translation of PCT International Application Publication No. 2020-502381 .

[Summary of Invention]

[Technical Problem]

In the above-mentioned spinning device, as described above, the waste yarn in the suction device is sent to the waste container together with the compressed air and collected in the waste container. At this time, there is a problem in that a sound generated by a suction operation of the suction device is propagated to the waste container, causing a noise in the waste container due to the suction operation. Therefore, it is desirable that the waste container (waste yarn box) in which waste yarn is collected has a structure that suppresses the noise.
Considering the above fact, the present invention aims to provide the waste yarn box that can suppress the noise.

[Solution to Problem]

At least one or more embodiments of the present invention is a waste yarn box for collecting a waste yarn sucked by a suction comprising:

a housing formed in a hollow box-shape;
a partition wall for dividing an inside of the housing into an inlet chamber and an outlet chamber and having a plurality of ventilation holes penetrated in thickness direction to suppress a passage of the waste yarn;
an inlet provided in the housing configuring the inlet chamber, through which the waste yarn flows into the inside of the inlet chamber; and
an outlet provided in the housing configuring the outlet chamber, through which air separated from the waste yarn flows out of the outlet chamber,
wherein the inlet and outlet are provided in a different wall portion of the housing than a wall portion opposite the partition wall in the thickness direction, and the inside of the housing is a closed space except for the inlet and outlet.

In the waste yarn box of the above configuration, the partition wall having the ventilation hole is provided inside the housing, and the partition wall divides the housing into the inlet chamber and the outlet chamber. The housing comprising the inlet chamber has the inlet for allowing the waste yarn to flow into the inlet chamber, and the housing comprising the outlet chamber has the outlet for allowing the air separated from the waste yarn to flow out. The inlet and outlet are provided in the wall portion in the housing that is different from the wall portion in the thickness direction opposite to the partition wall in the housing. This allows the sound propagated from the suction portion to the waste yarn box to be reflected repeatedly in the waste yarn box, thereby reducing an intensity of the sound leaking from the outlet to outside of the waste yarn box. Thus, the noise of the waste yarn box can be suppressed.
At least one or more embodiments of the present invention is the waste yarn box, wherein the partition wall is disposed in direction orthogonal with respect to up-down direction as the thickness direction.
In the waste yarn box of the above configuration, the partition wallis disposed with the direction orthogonal to the up-down direction as the thickness direction, so that the inside of the housing is partitioned by the partition wall in the direction orthogonal to the up-down direction. This allows, for example, the waste yarn that flows into the inlet chamber to be stored well on a lower wall of the housing, since the lower wall of the housing constitutes the lower wall of the inlet chamber. Thus, the partition wall can be provided in the waste yarn box without interfering with a waste yarn collection function of the waste yarn box.
At least one or more embodiments of the present invention is the waste yarn box, wherein the outlet is provided onthe lower wall of the housing.
In the waste yarn box of the above configuration, the outlet is provided on the lower wall of the housing, so that the sound in the outlet chamber can leak out from the outlet towards a space below the waste yarn box. This allows the sound in the outlet chamber to leak out from the lower wall of the waste yarn box, which is generally located below a head of an operator, towards opposite side of the operator's head, when the housing is installed on a floor or the like. Thus, the noise in the waste yarn box can be further suppressed.
At least one or more embodiments of the present invention is the waste yarn box, wherein an opening area of the outlet is set larger than the opening area of the inlet.
In the waste yarn box of the above configuration, the opening area of the outlet is set larger than the opening area of the inlet, so that an increase in air resistance of the air entering the waste yarn box from the inlet and being exhausted from the outlet can be suppressed compared, for example, with a case where the opening area of the outlet is set smaller than the opening area of the inlet. This allows the air separated from the waste yarn by the partition wall to be exhausted well from the outlet.
At least one or more embodiments of the present invention is the waste yarn box,

wherein the housing is formed in a shape of a rectangular box and the partition wall is formed in the shape of a rectangular plate,
wherein a pair of the partition walls are provided spaced apart in the thickness direction inside the housing, and the inside of the housing is divided by the pair of partition walls into the inlet chamber and a pair of the outlet chambers,
wherein the inlet chamber is disposed between the pair of the outlet chambers.

In the waste yarn box of the above configuration, the pair of partition walls are provided in the housing and the housing is divided by the pair of partition walls into the inlet chamber and the pair of outlet chambers, with the inlet chamber disposed between the pair of outlet chambers. This allows the sound leaking from the outlet of the outlet chamber to be dispersed. Thus, the noise of the waste yarn box can be suppressed even more effectively.
At least one or more embodiments of the present invention is the waste yarn box, wherein a sound-absorbing member is provided in at least one of the inlet chamber and the outlet chamber.
In the waste yarn box of the above configuration, the sound-absorbing member is provided in at least one of the inlet and outlet chambers, so that the sound in the housing can be absorbed by the sound-absorbing member. Therefore, the intensity of the sound leaking from the outlet to the outside of the waste yarn box can be further suppressed.
At least one or more embodiments of the present invention is the waste yarn box, wherein the sound-absorbing member is disposed in a position where it does not block the inlet and outlet.
In the waste yarn box of the above configuration, the sound-absorbing member is disposed in the position where it does not block the inlet and outlets, so that the inflow of the waste yarn from the inlet into the inlet chamber is prevented from being obstructed, and the exhaust of air from the outlet is prevented from being obstructed.
At least one or more embodiments of the present invention is the waste yarn box, wherein the sound-absorbing member covers an inner circumferential surface of the wall portion in the housing that is opposite to the partition wall in the thickness direction and is disposed adjacent to the inner circumferential surface.
In the waste yarn box of the above configuration, a volume reduction of the inlet or outlet chamber can be prevented since the sound-absorbing member is disposed adjacent to the inner circumferential surface of the wall portion in the housing that is opposite to the partition wall in the thickness direction.
At least one or more embodiments of the present invention is the waste yarn box, wherein the sound-absorbing member covers the inner circumferential surface of the wall portion of the housing that is opposite to the partition wall in the thickness direction and is disposed spaced apart with respect to the inner circumferential surface.
In one or more embodiments of the present invention, the sound-absorbing member is disposed spaced apart against the inner circumferential surface of the wall portion opposite the partition wall and the thickness direction in the housing, so that an air layer is formed between the wall portion and the sound-absorbing member. Thus, a sound absorbing band of the sound absorbing member for the sound generated in the waste yarn box can be expanded to a low frequency band. Therefore, a sound absorption effect of the sound-absorbing member can be further increased.

[Advantageous Effects of Invention]

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

[Brief Description of Drawings]

Fig. 1 is a schematic diagram illustrating a spinning system with a waste yarn box according to a first embodiment is applied.
Fig. 2 is a top view of the waste yarn box illustrated in Fig. 1.
Fig. 3 is a cross-sectional view from front illustrating an inside of the waste yarn box illustrated in Fig. 2 (cross-sectional view on line 3-3 of Fig. 2).
Fig. 4 is the cross-sectional view corresponding to Fig. 3, illustrating the inside of the waste yarn box in a comparative example.
Fig. 5 is a plan view illustrating a waste yarn box according to a second embodiment.
Fig. 6 is a cross-sectional view from front illustrating an inside of the waste yarn box illustrated in Fig. 5 (cross-sectional view on line 6-6 of Fig. 5).
Fig. 7 is a cross-sectional view corresponding to Fig. 3 illustrating a variant of a waste yarn box according to a first embodiment.
Fig. 8A is a plan view of the variant of a partition wall in the waste yarn box according to the first embodiment, and Fig. 8B is the plan view of another variant of the housing and the partition wall in the waste yarn box according to the first embodiment.

[Description of Embodiment]

First Embodiment

A waste yarn box 40 of a first embodiment will be described below using Fig. 1 to Fig. 3. The waste yarn box 40 forms part of a spinning yarn winding device 22 in a spinning system 10. The spinning system 10 will be described first, followed by a description of the waste yarn box 40.

Spinning System 10

As illustrated in Fig. 1, the spinning system 10 is configured as a system device for producing fully drawn yarn (FDY). The spinning system 10 comprises a spinning device 12 and the spinning yarn winding device 22. In the spinning device 12, a molten raw material is fed from an extruder 14 to a gear pump 16 and the raw material pumped by the gear pump 16 is extruded from a head 18, so that a plurality of spun yarn Y1 are drawn from the spinning device 12. The plurality of spun yarns Y1 drawn from the spinning device 12 are stretched by a stretching device 20 and sent to the spinning yarn winding device 22.
The spinning yarn winding device 22 has a guide mechanism 24 and a winding unit 26, to which a bobbin 28 is attached. The spun yarn Y1 drawn from the stretching device 20 is hung around the guide mechanism 24 and the bobbin 28 by a suction gun 30 as a suction, and the spinning yarn winding device 22 is operated so that the spun yarn Y1 that has passed through the guide mechanism 24 is wound onto the bobbin 28.
The suction gun 30 is configured as a well-known yarn suction, which sucks and holds the spun yarn Y1 during a yarn hanging operation in which the spun yarn Y1 is hung around the guide mechanism 24 and the bobbin 28. In other words, the suction gun 30 is connected to a compressed air supplier 32, and compressed air is supplied from the compressed air supplier 32 to the suction gun 30 to suction and hold the spun yarn Y1 from an air intake at a tip of the suction gun 30. Furthermore, the suction gun 30 is connected to the waste yarn box 40 by a hose 34. After completion of the yarn hanging operation with the suction gun 30, a cutter cuts the spun yarn Y1 and the compressed air sends the spun yarn Y1 in the suction gun 30 to the waste yarn box 40 as a waste yarn Y2, which is collected in the waste yarn box 40.

Waste Yarn Box 40

Next, the waste yarn box 40 is described using Fig. 2 and Fig. 3. The arrows UP, FR and RH shown in Fig. 2 and Fig. 3 as appropriate indicate the upper, front and right side of the waste yarn box 40 respectively. In the following description, when directions up-down, front-rear, and left-right are used, the directions up-down, front-rear, and left-right of the waste yarn box 40 are indicated, unless otherwise specified.
The waste yarn box 40 comprises a housing 42, which constitutes an outline of the waste yarn box 40, and a partition wall 50 provided inside the housing 42.
The housing 42 is formed in a hollow, substantially rectangular box shape. Four casters 44 are provided on an underside of the housing 42, the casters 44 being provided near each of the four corners of a lower wall 42D of the housing 42. The casters 44 have rollers 46, the rollers 46 configured to be rotatable with the left-right direction as axial direction. The casters 44 are placed on a floor or other installation portion where the housing 42 (waste yarn box 40) is installed.
The partition wall 50 is formed in a substantially rectangular plate shape with the left-right direction as thickness direction. The partition wall 50 is provided at a left end portion within the housing 42 and an outer periphery of the partition wall 50 is fixed to an inner circumferential surface of the housing 42. Thereby, the inside of the housing 42 is divided in the left-right direction by the partition wall 50. Specifically, a right-side portion from the partition wall 50 of the housing 42 is configured as a waste yarn collection chamber 52 as an inlet chamber, and a left-side portion from the partition wall 50 of the housing 42 is configured as an outlet chamber 54.
An upper wall 42U configuring the waste yarn collection chamber 52 in the housing 42 is provided with an inlet cylinder 56 as an inlet. In other words, the inlet cylinder 56 is provided on a different wall from a right wall 42R of the housing 42, which is opposite the partition wall 50 in the left-right direction (in the thickness direction of the partition wall 50). The inlet cylinder 56 is formed in a substantially cylindrical shape with the up-down direction as the axial direction and projects upwards from the upper wall 42U. The tip of the hose 34 drawn from the suction gun 30 is connected to the inlet cylinder 56. This allows the waste yarn Y2 sent from the suction gun 30 to flow into the waste yarn collection chamber 52 together with the compressed air.
A plurality of circularly shaped ventilation holes 50A are formed through the partition wall 50. Thereby, the inside of the waste yarn collection chamber 52 and the inside of the outlet chamber 54 are communicated by the ventilation holes 50A. The plurality of ventilation holes 50A are disposed side by side at predetermined intervals in the up-down and front-back directions of the partition wall 50. A diameter of the ventilation holes 50A is set so that the waste yarn Y2 that flows into the waste yarn collection chamber 52 does not flow out towards the outlet chamber 54. In other words, the partition wall 50 is configured as a wall portion that separates the compressed air and the waste yarn Y2 that flow into the waste yarn collection chamber 52 and allows separated air to pass to the outlet chamber 54 side.
An exhaust outlet 58 as an outlet is formed through the lower wall 42D configuring the outlet chamber 54 in the housing 42. In other words, the exhaust outlet 58 is provided in the wall portion different from a left wall 42L of the housing 42 opposite the partition wall 50 in the left-right direction (in the thickness direction of the partition wall 50). An opening area of the exhaust outlet 58 is set to be larger than the opening area of the inlet cylinder 56. The compressed air that flows out to the outlet chamber 54 is exhausted from the exhaust outlet 58 to outside of the housing 42.
In the housing 42, no openings other than the inlet cylinder 56 and the exhaust outlet 58 are formed. In other words, the inside of the housing 42 is a closed space except for the inlet cylinder 56 and the exhaust outlet 58.

Actions and Effects

The actions and effects of the present embodiment will now be described.
In the waste yarn box 40 configured as described above, the tip of the hose 34 drawn from the suction gun 30 is connected to the inlet cylinder 56. As a result, the waste yarn Y2 sucked in 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 in the partition wall 50 and flows into the outlet chamber 54. 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 from the exhaust outlet 58. This allows the compressed air flowing into the waste yarn box 40 and the waste yarn Y2 to be separated by the waste yarn box 40 and the waste yarn Y2 to be collected in the waste yarn box 40.
The suction gun 30 suctions the waste yarn Y2 with a supplied compressed air and sends the suctioned waste yarn Y2 to the inlet cylinder 56 of the waste yarn box 40 by means of the hose 34, and the waste yarn Y2 flows into the waste yarn box 40 through the inlet cylinder 56. As a result, the sound generated by a suction operation of the suction gun 30 (hereinafter referred to as a suction sound) is propagated from the inlet cylinder 56 to the waste yarn box 40, and a sound (noise) caused by the suction sound may be generated in the waste yarn box 40.
Here, in the waste yarn box 40, a partition wall 50 having the ventilation hole 50A is provided in the housing 42, and the partition wall 50 divides the housing 42 into the waste yarn collection chamber 52 and the outlet chamber 54. The housing 42 configuring the waste yarn collection chamber 52 is provided with the inlet cylinder 56 for allowing waste yarn Y2 to flow into the waste yarn collection chamber 52, and the exhaust outlet 58 for allowing the compressed air separated from the waste yarn Y2 to flow out is formed on the housing 42 configuring the outlet chamber 54. The exhaust outlet 58 is provided on the wall portion different from the left wall 42L that constitutes the outlet chamber 54 in the housing 42, and the inlet cylinder 56 is provided on the wall portion different from the right wall 42R that constitutes the waste yarn collection chamber 52 in the housing 42. This allows the sound caused by the suction sound to be reflected repeatedly in the waste yarn box 40, thereby reducing an intensity of the sound leaking out of the exhaust outlet 58 to the outside of the waste yarn box 40. Thus, the noise of the waste yarn box 40 can be suppressed.
This point is explained below in comparison with a comparative example waste yarn box 100 illustrated in Fig. 4. The configuration of the waste yarn box 100 of the comparative example will be described first. The waste yarn box 100 is configured in the same way as the waste yarn box 40 of the first embodiment, except for the points illustrated below. In Fig. 4, parts similarly configured to the waste yarn box 40 of the first embodiment are marked with the same symbol. In the waste yarn box 100, the partition wall 50 of the waste yarn box 40 of the present embodiment is omitted and the inside of the housing 42 comprises only the waste yarn collection chamber 52. In the waste yarn box 100 of the comparative example, the exhaust outlet 58 is omitted in the housing 42, and the ventilation holes 50A are formed in the right wall 42R and the left wall 42L of the housing 42 to separate the waste yarn Y2 from the compressed air and to exhaust the compressed air outside the waste yarn box 100. Therefore, in the waste yarn box 100 of the comparative example, the sound caused by the suction sound generated in the waste yarn box 100 leaks directly from the ventilation holes 50A formed in the housing 42 to the outside of the waste yarn box 100 (see arrow illustrated in Fig. 4). As a result, the intensity of the sound leaking to the outside of the waste yarn box 100 is relatively high and the noise due to the suction sound may be generated in the waste yarn box 100.
In contrast, in the waste yarn box 40 of the first embodiment, the partition wall 50 having the ventilation hole 50A is provided in the housing 42, and the partition wall 50 divides the housing 42 into the waste yarn collection chamber 52 and the outlet chamber 54. This allows the compressed air and the waste yarn Y2 to be separated by the partition wall 50 and the waste yarn Y2 to be collected in the waste yarn collection chamber 52, while the compressed air can flow towards the outlet chamber 54. The air flowed to the outlet chamber 54 can then be exhausted from the exhaust outlet 58.
In the waste yarn box 40, the sound resulting from the suction sound generated in the waste yarn collection chamber 52 leaks out through the ventilation hole 50A in the partition wall 50 into 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, the sound reflected by the left wall 42L of the outlet chamber 54 is leaked from the ventilation hole 50A of the partition wall 50 into the waste yarn collection chamber 52, and the sound leaked into the waste yarn collection chamber 52 is reflected by the inner circumferential surface of the waste yarn collection chamber 52. Furthermore, the sound reflected by the right wall 42R of the outlet chamber 54 leaks out through the ventilation hole 50A of the partition wall 50 into the outlet chamber 54. Thus, in the waste yarn box 40, when the sound caused by the suction sound propagated from the suction gun 30 to the inlet cylinder 56 is generated in the waste yarn box 40, the sound is repeatedly reflected between the left wall 42L and the right wall 42R in the waste yarn box 40 (see arrow illustrated in Fig. 3). This increases the distance of the sound generated in the waste yarn box 40 to the exhaust outlet 58. Furthermore, the sound inside the waste yarn box 40 is repeatedly reflected by the left wall 42L and the right wall 42R of the waste yarn box 40, thereby increasing the transmitted sound transmitted through the housing 42. As a result, the intensity of the sound leaking out of the waste yarn box 40 from the exhaust outlet 58 can be suppressed compared to the waste yarn box 100 in the comparative example above. Thus, according to the waste yarn box 40 of the first embodiment, the noise caused by the suction sound can be suppressed.
As described above, the exhaust outlet 58 and the inlet cylinder 56 are provided in the wall portion different from the wall portion located on both sides of the thickness direction of the partition wall 50 in the waste yarn box 40. In other words, the exhaust outlet 58 and the inlet cylinder 56 are provided in the wall portion different from the left wall 42L and the right wall 42R, which function primarily as a reflecting wall to reflect towards the waste yarn collection chamber 52 side or the outlet chamber 54 side. This allows the sound generated in the waste yarn box 40 to be reflected well by the left wall 42L and the right wall 42R, and also prevents the sound passing through the ventilation hole 50A in the partition wall 50 from leaking directly from the exhaust outlet 58.
The partition wall 50 is formed in the substantially rectangular plate shape with the left-right direction as the thickness direction, and the inside of the housing 42 is divided in the left-right direction by the partition wall 50. As a result, the lower wall 42D of the housing 42 constitutes the lower wall of the waste yarn collection chamber 52, so that, for example, the waste yarn Y2 that flows into the waste yarn collection chamber 52 can be stored well on the lower wall 42D. Thus, the partition wall 50 can be provided in the waste yarn box 40 without interfering with a collection function of the waste yarn Y2 in the waste yarn box 40.
The exhaust outlet 58 is provided on the lower wall 42D configuring the outlet chamber 54 in the housing 42. This allows the sound in the outlet chamber 54 to leak out from the exhaust outlet 58 towards a space below (installation side) of the waste yarn box 40. This allows the sound in the outlet chamber 54 to leak out from the lower wall 42D of the waste yarn box 40, which is generally located below the head of an operator, towards opposite side of the operator's head. Thus, the noise in the waste yarn box 40 can be further suppressed.
The opening area of the exhaust outlet 58 is set to be larger than the opening area of the inlet cylinder 56. This prevents, for example, an increase in the air resistance of the compressed air that flows into the waste yarn box 40 from the inlet cylinder 56 and is exhausted from the exhaust outlet 58, compared to a case where the opening area of the exhaust outlet 58 is set to be smaller than the opening area of the inlet cylinder 56. This allows the compressed air separated from the waste yarn Y2 by the partition wall 50 to be exhausted from the exhaust outlet 58 in a good manner.

Second Embodiment

Next, a waste yarn box 200 of a second embodiment is described using Fig. 5 and Fig. 6. The waste yarn box 200 of the second embodiment is configured in the same way as a waste yarn box 40 of a first embodiment, except for the following points. In Fig. 5 and Fig. 6, parts similarly configured to the waste yarn box 40 of the first embodiment are marked with the same symbol.
In other words, in the waste yarn box 200, sound-absorbing members 202 are provided in a waste yarn collection chamber 52 and an outlet chamber 54 in a housing 42, respectively. The sound-absorbing member 202 is formed in a substantially rectangular plate shape with left-right direction as thickness direction. The sound-absorbing member 202 in the waste yarn collection chamber 52 is disposed adjacent to a right wall 42R of the housing 42 and the sound-absorbing member 202 in the outlet chamber 54 is disposed adjacent to a left wall 42L of the housing 42. This is configured to prevent an excessive reduction in a 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. A size of the sound-absorbing member 202 viewed from the left-right direction is set so that the sound-absorbing member 202 covers almost an entire inner circumferential surface of the right wall 42R and the left wall 42L. Furthermore, in the outlet chamber 54, the exhaust outlet 58 is located to the right of the sound-absorbing member 202 in the outlet chamber 54 so that the exhaust outlet 58 is not blocked by the sound-absorbing member 202. This ensures that even if the sound-absorbing member 202 is provided in the outlet chamber 54, it does not obstruct the exhaust of compressed air from the exhaust outlet 58. In the waste yarn collection chamber 52, the sound-absorbing member 202 is disposed in a position where it does not block the inlet cylinder 56. As a result, even if the sound-absorbing member 202 is provided in the waste yarn collection chamber 52, it is configured so that it does not obstruct the inflow of waste yarn Y2 from the inlet cylinder 56.
The sound-absorbing member 202 is made of a porous, continuous-bubble material such as glass wool or rock wool. This allows a vibration of sound waves entering the sound-absorbing member 202 to be converted into thermal energy by the sound-absorbing member 202, thereby attenuating the sound in the housing 42.
In the waste yarn box 200 of the second embodiment, as in the first embodiment, the waste yarn collection chamber 52 and the outlet chamber 54 are divided in the housing 42 by the partition wall 50. Therefore, as in the first embodiment, in the waste yarn box 200, the sound caused by a suction sound propagated from a suction gun 30 to the inlet cylinder 56 is repeatedly reflected between the left wall 42L and the right wall 42R in the waste yarn box 40. This allows the sound generated within the waste yarn box 40 to reach the exhaust outlet 58 over a longer distance, thereby increasing the transmitted sound transmitted through the housing 42. Therefore, in the second embodiment, a noise of the waste yarn box 200 caused by the suction sound can also be suppressed.
Moreover, in the second embodiment, as described above, the sound-absorbing members 202 are provided in the waste yarn collection chamber 52 and the outlet chamber 54 of the waste yarn box 200, respectively. 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 circumferential surface of the right wall 42R and the left wall 42L. As a result, the sound inside the housing 42 caused by the suction sound propagated from the suction gun 30 to the inlet cylinder 56 is absorbed by the sound-absorbing member 202. Thus, the intensity of the sound leaking from the exhaust outlet 58 to the outside of the waste yarn box 200 can be further suppressed. Therefore, the noise in the waste yarn box 200 caused by the suction sound can be effectively suppressed.
In the second embodiment, the sound-absorbing member 202 is provided in the waste yarn collection chamber 52 and the outlet chamber 54 of the waste yarn box 200 respectively, but the sound-absorbing member 202 may be configured to be provided in one of the waste yarn collection chamber 52 and the outlet chamber 54. In this case, the sound caused by the suction sound in the waste yarn box 200 can still be absorbed by the sound-absorbing member 202. Also, by providing the sound-absorbing member 202 in one of the waste yarn collection chamber 52 and the outlet chamber 54, the waste yarn box 200 can contribute to reducing the cost of the waste yarn box 200.
In the second embodiment, the sound-absorbing member 202 is disposed adjacent to the respective inner circumferential surfaces of the right wall 42R and the left wall 42L in the housing 42, but the sound-absorbing member 202 may be disposed spaced apart from the right wall 42R and the left wall 42L. In other words, 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. Thus, a sound absorbing band of the sound absorbing member 202 for the sound generated in the waste yarn box 200 can be expanded to a low frequency band. As a result, a sound absorption effect of the sound-absorbing member 202 can be further increased.
In the waste yarn boxes 40 and 200 of the first and second embodiments, the partition wall 50 at one location is provided in the housing 42 to divide the housing 42 into the waste yarn collection chamber 52 and the outlet chamber 54, but a pair of partition walls 50 may be provided in the housing 42 to divide the housing 42 by the pair of partition walls 50. A variant of the waste yarn box 40 of the first embodiment with the pair of partition walls 50 will be described below using Fig. 7.
As illustrated in this figure, in the variant of the waste yarn box 40, the left and right portions in the housing 42 are each provided with the partition wall 50. The portion between the pair of partition walls 50 in the housing 42 is configured as the waste yarn collection chamber 52, and the portions on both sides of the housing 42 in the left-right direction with respect to the waste yarn collection chamber 52 are configured as the outlet chamber 54. The lower wall 42D of the housing 42, which constitutes the outlet chamber 54, is formed with exhaust ports 58 respectively. In other words, two exhaust outlets 58 are formed in the lower wall 42D of the waste yarn box 40. The total opening area of the two exhaust openings 58 is set to be larger than the opening area of the inlet cylinder 56.
For the variant of the waste yarn box 40, the sound caused by the suction sound propagated from the suction gun 30 to the inlet cylinder 56 is repeatedly reflected between the left wall 42L and the right wall 42R in the waste yarn box 40. This allows the sound generated within the waste yarn box 40 to reach the exhaust outlet 58 over a longer distance, thereby increasing the transmitted sound transmitted through the housing 42. Therefore, even in the variant of the waste yarn box 40, the intensity of the sound leaking out of the waste yarn box 40 from the exhaust outlet 58 can be suppressed.
In the variant of the waste yarn box 40, two exhaust openings 58 are formed in the lower wall 42D of the housing 42 and the total opening area of the two exhaust openings 58 is set to be larger than the opening area of the inlet cylinder 56. Therefore, in the waste yarn box 40 of the variant, the opening area of the exhaust outlet 58 can be set smaller than in the first embodiment, and the exhaust outlets 58 can be disposed in a dispersed manner. This allows the sound leaking from the lower wall 42D of the housing 42 to be dispersed in a lower space of the waste yarn box 40. Thus, the noise of the waste yarn box 40 can be suppressed even more effectively.
In the waste yarn boxes 40 and 200 of the first and second embodiments, the inlet cylinder 56 is provided on an upper wall 42U of the housing 42 and the exhaust outlet 58 is provided on the lower wall 42D of the housing 42, but the positions of the inlet cylinder 56 and exhaust outlet 58 are not limited to this. For example, the inlet cylinder 56 and the exhaust outlet 58 may be provided on a front or a rear wall of the housing 42. In other words, the inlet cylinder 56 and the exhaust outlet 58 can be provided on a different wall of the housing 42 than the left wall 42L and the right wall 42R.
In the waste yarn boxes 40 and 200 of the first and second embodiments, the partition wall 50 is formed in the substantially rectangular plate shape with the left-right direction as the thickness direction and divides the inside of the housing 42 into the waste yarn collection chamber 52 and the outlet chamber 54, but the shape of the partition wall 50 is not limited to this. For example, as illustrated in Fig. 8A, the partition wall 50 may be formed as a rectangular cylinder with the up-down direction as axial direction, dividing the inside of the housing 42 into the waste yarn collection chamber 52 and the outlet chamber 54. When the partition wall 50 is formed in a cylindrical shape, the housing 42 may be formed as a hollow cylindrical box and the partition wall 50 may be formed in the cylindrical shape with the up-down direction as the axial direction, for example, as illustrated in Fig. 8B. Even if the housing 42 and the partition wall 50 are configured in this way, the waste yarn Y2 can be collected in the waste yarn collection chamber 52, as in the first and second embodiments, and the sound in the housing 42 can be reflected by the inner circumferential surface of an outer wall of the housing 42 to increase a sound propagation distance in the housing 42.
The waste yarn boxes 40 and 200 of the first and second embodiments are applied to a system device for generating FDY, but the waste yarn boxes 40 and 200 can also be applied to the system device for generating semi-stretched yarn (POY: Partially Oriented Yarn) and to the system device for processing POY to generate temporary twisted Processed yarn (DTY: Draw Textured Yarn).
The suction gun 30 used in the spinning system 10 include those operated by an operator as well as those comprising a yarn hanging robot.

[Explanation of the Reference Numerals]

22: Spinning yarn winding device
30: Suction gun (suction)
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 cylinder (inlet)
58: Exhaust outlet (outlet)
200: Waste yarn box
202: Sound-absorbing member
Y1: Spinning yarn
Y2: Waste yarn

Claims

A waste yarn box 40 for collecting a waste yarn Y2 sucked by a suction 30 comprising:
a housing 42 formed in a hollow box-shape;

a partition wall 50 for dividing an inside of the housing 42 into an inlet chamber 52 and an outlet chamber 54 and having a plurality of ventilation holes 50A penetrated in thickness direction to suppress a passage of the waste yarn Y2;

an inlet 56 provided in the housing 42 configuring the inlet chamber 52, through which the waste yarn Y2 flows into the inside of the inlet chamber 52; and

an outlet 58 provided in the housing 42 configuring the outlet chamber 54, through which air separated from the waste yarn Y2 flows out of the outlet chamber 54,

wherein the inlet 56 and outlet 58 are provided in a different wall portion of the housing 42 than a wall portion opposite the partition wall 50 in the thickness direction, and the inside of the housing 42 is a closed space except for the inlet 56 and outlet 58.
The waste yarn box 40 according to claim 1, wherein the partition wall 50 is disposed in direction orthogonal with respect to up-down direction as the thickness direction.
The waste yarn box 40 according to claim 2, wherein the outlet 58 is provided on a lower wall 42D of the housing 42.
The waste yarn box 40 according to any one of claims 1 to 3, wherein an opening area of the outlet 58 is set larger than the opening area of the inlet 56.
The waste yarn box 40 according to any one of claims 1 to 4,
wherein the housing 42 is formed in a shape of a rectangular box and the partition wall 50 is formed in the shape of a rectangular plate,

wherein a pair of the partition walls 50 are provided spaced apart in the thickness direction inside the housing 42, and the inside of the housing 42 is divided by the pair of partition walls 50 into the inlet chamber 52 and a pair of the outlet chambers 54,

wherein the inlet chamber 52 is disposed between the pair of the outlet chambers 54.
The waste yarn box 40 according to any one of claims 1 to 5, wherein a sound-absorbing member 202 is provided in at least one of the inlet chamber 52 and the outlet chamber 54.
The waste yarn box 40 according to claim 6, wherein the sound-absorbing member 202 is disposed in a position where it does not block the inlet 56 and outlet 58
The waste yarn box 40 according to claim 6 or claim 7, wherein the sound-absorbing member 202 covers an inner circumferential surface of a wall portion in the housing 42 that is opposite to the partition wall 50 in the thickness direction and is disposed adjacent to the inner circumferential surface.
The waste yarn box 40 according to claim 6 or claim 7, wherein the sound-absorbing member 202 covers the inner circumferential surface of the wall portion of the housing 42 that is opposite to the partition wall 50 in the thickness direction and is disposed spaced apart with respect to the inner circumferential surface.