JP7475004B2 - Oil application guide and spinning take-off machine - Google Patents

Description

The present invention relates to an oil application guide that applies oil to yarn, and a spinning take-up machine equipped with an oil application guide.

Patent document 1 discloses an oil application guide for applying an oil to a traveling yarn in a synthetic fiber spinning process (see FIG. 3 of Patent document 1). The oil application guide is formed with a flow path through which the oil discharged from the oil discharge hole flows downward. The flow path has a yarn contact surface that extends substantially vertically and contacts the yarn, an oil discharge surface that is disposed below the yarn contact surface and extends diagonally backward and downward, and a regulating surface formed on both sides of the yarn contact surface and the oil discharge surface in the width direction of the flow path to regulate the yarn from moving out of the flow path in the width direction. The yarn that contacts the yarn contact surface leaves the yarn contact surface at the downstream end of the yarn contact surface in the flow direction of the oil. The oil discharged from the oil discharge hole flows through the flow path and adheres to the traveling yarn that is in contact with the yarn contact surface. Of the oil flowing through the flow path, a portion of the oil that does not adhere to the yarn scatters from the oil application guide or drips down along the oil discharge surface and is discharged (recovered).

JP 2002-309432 A

In recent years, the present inventors have found that, depending on conditions such as the thickness of the thread or the concentration of the oil, a problem occurs in which the oil that does not adhere to the thread is likely to scatter or drip. As a result of extensive research by the present inventors, it has been found that the scattering of the oil is caused by the following reasons. That is, if the oil unintentionally accumulates in the flow path (for example, in the space surrounded by the oil discharge surface and the regulating surface) near the thread immediately after it leaves the thread contact surface, the accumulated oil is dragged by the thread and splashes out of the flow path when the thread leaves the oil application guide. This is thought to cause the oil to scatter, etc.

The objective of the present invention is to prevent unintended accumulation of oil that has not adhered to the thread in the oil application guide.

The oil application guide of the first invention is an oil application guide for applying oil to a yarn traveling from above to below, and is equipped with a guide body having a flow path for flowing the oil from above to below, the flow path having a yarn contact surface with which the yarn comes into contact and from which the yarn separates at the downstream end in the oil flow direction in which the oil flows, an oil discharge surface for discharging the oil, which is disposed downstream of the yarn contact surface in the oil flow direction and is formed so as to become farther away from the yarn path the more downstream in the oil flow direction, and a pair of regulating surfaces formed at both ends of the flow path in the width direction of the flow path, and the distance in the width direction between the pair of regulating surfaces is 0.35 mm or less at the narrowest part of the parts formed on both sides of the yarn contact surface in the width direction.

In general, the oil application guide is arranged so that the thread contact surface is located on the upper side and the oil discharge surface is located on the lower side. The oil supplied to the oil application guide arranged in this way flows from the top to the bottom along the thread contact surface and the oil discharge surface. As described above, if the oil unintentionally accumulates in the flow path near the thread away from the thread contact surface, the accumulated oil may be dragged by the thread and jump out of the flow path, causing scattering, etc. In particular, the oil flowing at both ends of the flow path in the width direction flows downstream in the oil flow direction without coming into contact with the thread (i.e., there is no possibility of it adhering to the thread), and is likely to accumulate in the space. In addition, if there is a large amount of oil that does not adhere, the oil will drip and be discharged (recovered) from the oil discharge surface.

In the present invention, the distance between the pair of regulating surfaces in the width direction is narrowed to 0.35 mm or less at the narrowest part of the parts formed on both sides of the yarn contact surface in the width direction. This makes it easier for the oil flowing through the narrow part of the flow path to come into contact with the yarn (i.e., to adhere to the yarn). This makes it possible to reduce the amount of oil that flows downstream in the oil flow direction without adhering to the yarn, thereby preventing the oil from accumulating in the space. This makes it possible to prevent the oil that has not adhered to the yarn from unintentionally accumulating in the oil application guide.

The second invention is an oil application guide for applying oil to a yarn traveling from above to below, and includes a guide body having a flow path for flowing the oil from above to below, the flow path having a yarn contact surface with which the yarn comes into contact and from which the yarn separates at the downstream end in the oil flow direction in which the oil flows, an oil discharge surface for discharging the oil, which is disposed downstream of the yarn contact surface in the oil flow direction and is formed so as to become farther away from the yarn path the more downstream in the oil flow direction, and a pair of regulating surfaces formed at both ends of the flow path in the width direction of the flow path, the pair of regulating surfaces being formed on both sides of the yarn contact surface in the width direction, and not formed on both sides in the width direction of at least the upstream end of the oil discharge surface in the oil flow direction.

In the present invention, there is a portion in the oil flow direction where no regulating surface is formed immediately downstream of the position where the thread separates from the thread contact surface (hereinafter referred to as the separation position). This makes it possible to reduce the space in which the oil can accumulate downstream of the separation position in the oil flow direction. Therefore, in the present invention, it is possible to prevent the unintended accumulation of oil that has not adhered to the thread in the oil application guide.

The oil application guide of the third invention is characterized in that, in the first or second invention, the gap in the width direction between the pair of regulating surfaces formed on both sides of the yarn contact surface is narrowest at the position where the yarn leaves the yarn contact surface.

In the present invention, the gap is narrow at the above-mentioned separation position and its surroundings, so the space in which the oil can accumulate can be made small. Therefore, scattering of the oil can be further suppressed.

The fourth invention is an oil application guide according to any one of the first to third inventions, characterized in that, in a cross section perpendicular to the width direction, the angle between the yarn path extending downstream in the yarn running direction from the point where the yarn leaves the yarn contact surface and the upstream end of the oil discharge surface in the oil flow direction is 50 degrees or more.

If the angle is small, the effect of surface tension will be large in the space between the thread and the oil discharge surface immediately after it leaves the thread contact surface, and the oil may be more likely to accumulate. In the present invention, the angle is large, at 50 degrees or more, so the effect of surface tension can be reduced. Therefore, the accumulation of oil in the space between the thread and the oil discharge surface can be suppressed.

The fifth invention is an oil application guide according to any one of the first to fourth inventions, characterized in that when the guide body is oriented so as to bring the yarn running from top to bottom into contact with the yarn contact surface, the angle between the oil discharge surface and a vertical line in a cross section perpendicular to the width direction is 60 degrees or more and 72 degrees or less.

In the present invention, by making the angle between the oil discharge surface and the vertical line between 60 degrees and 72 degrees, it is possible to both prevent the oil from accumulating in the space between the thread and the oil discharge surface and allow the oil to be smoothly discharged along the oil discharge surface by gravity.

The sixth invention is an oil application guide according to the first or second invention, characterized in that the oil discharge surface has a first discharge surface arranged downstream of the yarn contact surface in the oil flow direction, and a second discharge surface arranged further downstream of the first discharge surface in the oil flow direction and bent with respect to the first discharge surface, and when the guide body is oriented to bring the yarn traveling from above to below into contact with the yarn contact surface, in a cross section perpendicular to the width direction, a second angle formed between the second discharge surface and a vertical line is smaller than a first angle formed between the first discharge surface and a vertical line.

For example, as in the fourth invention described above, by increasing the angle between the yarn path and the upstream end of the oil discharge surface in the oil flow direction, it is possible to prevent the oil from accumulating in the space between the yarn and the oil discharge surface. On the other hand, if the angle between the oil discharge surface and the vertical line is also increased by increasing the angle, the oil discharge surface approaches horizontal, which may reduce the efficiency of oil discharge using gravity (particularly, the effect of the reduction in discharge efficiency is large when the oil starts to flow before the yarn is run). More specifically, if it becomes difficult to discharge the oil from the downstream part of the oil discharge surface in the oil flow direction, the oil may also easily accumulate in the upstream part of the oil discharge surface. In this regard, in the present invention, even if the first angle is increased, the second angle can be reduced, thereby preventing a reduction in the efficiency of oil discharge.

The seventh invention is the oil application guide of the sixth invention, characterized in that the second angle is 50 degrees or less.

In the present invention, the second angle is small, at 50 degrees or less, so that the decrease in efficiency of oil discharge can be more reliably suppressed.

The eighth invention of the spinning take-up machine is characterized by comprising a spinning device that spins out yarn, a take-up device that takes up the yarn spun from the spinning device and winds it onto a bobbin, and an oil application guide according to any one of the first to seventh inventions that is disposed between the spinning device and the take-up device in the yarn running direction.

In general, because yarn is spun from a spinning device at high speed, there is a high risk that oil that has unintentionally accumulated in the oil application guide will be dragged along by the fast-moving yarn and scattered. It is particularly effective to apply the oil application guide described above to such a spinning take-up machine to prevent oil that has not adhered to the yarn from accumulating unintentionally.

The ninth invention is a spinning take-up machine according to the eighth invention, characterized in that the spinning device is capable of spinning yarn having a thickness of 55 decitex or less.

When applying oil to thin yarns, the oil flowing through the flow path and flowing at both ends of the flow path in the width direction tends to flow downstream in the oil flow direction without coming into contact with the yarn (i.e., without the possibility of adhering to the yarn). This can lead to a large amount of oil unintentionally accumulating in the oil application guide. It is particularly effective to apply the oil application guide to such a spinning take-up machine to prevent unintentional accumulation of oil that has not adhered to the yarn.

The spinning take-off machine of the tenth invention is characterized in that, in the eighth or ninth invention, it is equipped with an oil supply device capable of supplying an oil having a mass percent concentration of 85% or more to the oil application guide.

Generally, oils with high concentrations have high kinetic viscosity and are difficult to adhere to the yarn (for example, in a yarn made of multiple filaments, the oil is difficult to penetrate between the filaments). This results in a large amount of oil flowing downstream in the oil flow direction without adhering to the yarn. It is particularly effective to apply the oil application guide described above to such a spinning take-up machine to prevent the unintended accumulation of oil that does not adhere to the yarn.

FIG. 1 is a side view showing a yarn take-off machine according to a first embodiment. FIG. 2 is a schematic diagram showing an oil agent application device. FIG. 2 is a front view of the oil application guide of the first embodiment. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 11 is a table showing the results of confirming the effects of the first embodiment. FIG. 11 is a front view of an oil application guide according to a second embodiment. 7A is a cross-sectional view taken along line VII-VII in FIG. 6, and FIG. 7B is an enlarged view of a portion of FIG. 13 is a table showing the results of confirming the effects of the second embodiment. FIG. 11 is a cross-sectional view of an oil application guide according to a modified example of the second embodiment.

First Embodiment
Next, a first embodiment of the present invention will be described. For convenience of explanation, the directions shown in Fig. 1 and Fig. 2 are referred to as the up-down direction, the left-right direction, and the front-rear direction. The up-down direction is the vertical direction in which gravity acts. The front-rear direction is the direction perpendicular to the up-down direction in which bobbins B (described later) are arranged side by side. The left-right direction is the direction perpendicular to both the up-down direction and the front-rear direction. The direction in which the yarn Y runs is referred to as the yarn running direction.

(Yarn take-off machine)
The outline of the spinning take-off machine 1 according to the first embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a side view showing the spinning take-off machine 1 according to the first embodiment. Fig. 2 is a schematic diagram showing an oil agent application device 3 described later. As shown in Fig. 1, the spinning take-off machine 1 includes a spinning device 2, an oil agent application device 3, a drawing device 4, and a take-off device 5.

The spinning device 2 is configured to spin multiple threads Y made of synthetic fibers (e.g., polyester) from the outlets (not shown) of multiple spinnerets 2a arranged, for example, in the left-right direction. As an example, the spinning device 2 can spin 12 threads Y as shown in FIG. 1. Each thread Y is, for example, a multifilament thread composed of multiple filaments f. However, this is not limited to this, and the thread Y may be composed of one filament f. The spinning device 2 can change the thickness of the spun thread Y (filament f) depending on the opening area of the outlet of the spinneret 2a. As an example, the spinning device 2 can spin a thin thread Y of 55 decitex or less. In addition, a cooling device (not shown) is provided below the spinning device 2 to cool the multiple threads Y immediately after they are spun from the spinning device 2.

The oil application device 3 has a plurality of oil application guides 11 corresponding to a plurality of yarns Y running from above to below, and an oil supply device 12 (see FIG. 2) that supplies oil to the plurality of oil application guides 11. The oil application device 3 is configured, for example, to supply oil from the oil supply device 12 to the oil application guide 11 via a supply pipe 13 (see the arrow pointing to the left on the paper in FIG. 2). The oil supplied to the oil application guide 11 through the supply pipe 13 comes into contact with the yarn Y and adheres to the yarn Y. A portion of the oil that remains without adhering to the yarn Y passes, for example, through a recovery path 14 arranged below the oil application guide 11 (see the arrow pointing to the lower right on the paper in FIG. 2) and is collected in a collection box 15.

The oil application guides 11 are arranged below the spinning device 2 and the cooling device (not shown) in correspondence with the multiple yarns Y. The oil application guides 11 are arranged between the cooling device and the take-up device 5 in the yarn running direction (in other words, between the spinning device 2 and the take-up device 5). The oil application guide 11 is configured to combine multiple filaments f spun from the spinneret 2a into one yarn Y and to apply the oil supplied from the oil supply device 12 to the yarn Y. Details of the oil application guide 11 will be described later. The oil supply device 12 is configured to be able to supply, for example, a mixture (emulsion) of water and oil as the oil. The oil supply device 12 can supply oils of various concentrations. As an example, the oil supply device 12 can supply a high-concentration oil with a mass percent concentration of 85% or more.

The drawing device 4 is disposed below the oil application device 3. The drawing device 4 has a heat-retaining box 16 and a number of heating rollers 16a housed in the heat-retaining box 16. The drawing device 4 draws the multiple yarns Y while heating each of them with the multiple heating rollers 16a. The moisture contained in the oil applied to the yarn Y is evaporated by heating the yarn Y with, for example, the heating rollers 16a, and is removed from the oil.

The take-up device 5 takes up multiple yarns Y spun from the spinning device 2 and winds them onto multiple bobbins B to form a package P. As shown in Figures 1 and 2, the take-up device 5 includes a first godet roller 17 and a second godet roller 18 that take up the yarns Y, and a winding section 19 that winds the taken-up yarns Y onto bobbins B. The winding section 19 includes multiple fulcrum guides 21, multiple traverse guides 22, a turret 23, two bobbin holders 24, and a contact roller 25.

The multiple fulcrum guides 21 are guides that serve as fulcrums when the yarn Y is traversed by the traverse guide 22. The multiple fulcrum guides 21 are provided individually for the multiple yarns Y and are arranged in the front-to-rear direction. The multiple traverse guides 22 are provided individually for the multiple yarns Y and are arranged side by side in the front-to-rear direction. The traverse guides 22 are driven by a motor (not shown) to traverse the yarn Y in the front-to-rear direction.

The turret 23 is a disk-shaped member whose axial direction is approximately parallel to the front-rear direction. The turret 23 is rotated by a turret motor (not shown). The two bobbin holders 24 each have an axial direction parallel to the front-rear direction and are rotatably supported at the upper and lower ends of the turret 23. Each bobbin holder 24 has a plurality of bobbins B arranged in the front-rear direction, each of which is provided for a plurality of yarns Y. The two bobbin holders 24 are rotated by individual motors (not shown). The contact roller 25 comes into contact with the surfaces of the plurality of packages P supported by the upper bobbin holder 24, thereby applying contact pressure to the surfaces of the packages P during winding and adjusting the shape of the packages P.

In the winding section 19 as described above, when the upper bobbin holder 24 is rotated, the yarn Y traversed by the traverse guide 22 is wound onto the bobbin B to form the package P. When the package P is fully wound, the turret 23 is rotated, swapping the upper and lower positions of the two bobbin holders 24. This moves the lower bobbin holder 24 to the upper side, and the yarn Y can be wound onto the bobbin B attached to this bobbin holder 24 to form the package P.

(Structure of oil application guide)
Next, the structure of the oil application guide 11 will be described with reference to Figures 3 and 4. Figure 3 is a front view of the oil application guide 11. Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3. Hereinafter, the direction in which the oil flows will be referred to as the oil flow direction. Furthermore, the width direction of a flow path 31 (described below), which is approximately parallel to the left-right direction, will simply be referred to as the width direction.

The oil application guide 11 has a guide body 30 in which a flow passage 31 for flowing the oil is formed. The guide body 30 is formed of a ceramic material such as alumina or zirconia, but is not limited to this.

The flow path 31 extends at least in the vertical direction and is configured to allow the oil to flow from above to below. A portion of the flow path 31 also functions as a passage for guiding the yarn Y from above to below. As shown in Figures 3 and 4, the flow path 31 has a supply hole 32, a discharge port 33, a flow surface 34, and a pair of regulating walls 35 (regulating walls 35a, 35b).

The supply hole 32 is a hole formed in the rear portion of the guide body 30 and extends in the front-rear direction. The supply hole 32 is formed so that the above-mentioned supply pipe 13 can be inserted from the rear. The discharge port 33 is located in the middle portion of the guide body 30 in the front-rear direction and at the front end of the supply hole 32. The discharge port 33 is located above the flow surface 34 and opens forward.

The flow surface 34 is a surface formed in the middle of the guide body 30 in the front-rear direction, which allows the oil to flow from above to below. The flow surface 34 has a thread contact surface 36 and an oil discharge surface 37. The thread contact surface 36 is a surface formed below the discharge port 33 and generally faces forward. The thread contact surface 36 generally extends in the vertical direction. For example, the thread contact surface 36 is slightly curved backward as it goes downward. However, this is not limited to this, and the thread contact surface 36 may be provided in a generally flat shape along the vertical direction, for example. The thread contact surface 36 is formed so that the thread Y running from above to below comes into contact with the thread contact surface 36, and the oil flows from above to below. The position of the thread contact surface 36 where the thread Y first comes into contact (the position immediately below the discharge port 33) is the upper end of the thread contact surface 36. In addition, in a cross section perpendicular to the width direction (see FIG. 4), the point where the thread Y leaves the thread contact surface 36 is defined as the separation point P1. Immediately after leaving the yarn contact surface 36, the yarn Y travels along a tangent to the yarn contact surface 36 with the separation point P1 as the tangent (i.e., a part of the yarn path 101 (see FIG. 4), which is the path along which the yarn Y passes, corresponds to the tangent).

In addition, a surface 39 facing at least the front side is formed above the discharge port 33, similar to the yarn contact surface 36. The surface 39 extends upward and rearward from the discharge port 33. The yarn Y comes into contact with the lower end of the surface 39 (the end immediately above the discharge port 33). The surface 39 is not included in the flow surface 34.

The oil discharge surface 37 is formed below the yarn contact surface 36 and is connected to the yarn contact surface 36. The upper end of the oil discharge surface 37 is connected to the lower end of the yarn contact surface 36. The oil discharge surface 37 extends diagonally downward and rearward (see FIG. 4). That is, the oil discharge surface 37 is formed so that the further downstream in the oil flow direction the oil discharge surface 37 is, the farther it is from the yarn path 101. For example, at least the upstream portion of the oil discharge surface 37 in the oil flow direction is formed in a substantially flat shape. The oil that does not adhere to the yarn Y flows downward along the oil discharge surface 37 and further falls onto the recovery path 14 (see FIG. 2). As a result, the oil passes through the recovery path 14 and is collected in the recovery box 15 (see FIG. 2).

The boundary between the thread contact surface 36 and the oil discharge surface 37 is defined, for example, as follows. As described above, at least the upstream portion of the oil discharge surface 37 in the oil flow direction is formed in a substantially planar shape. Therefore, for example, in a cross section perpendicular to the width direction, the point where a straight line extending along the outer edge of the upstream portion of the oil discharge surface 37 in the oil flow direction and the actual outer edge of the flow surface 34 separate (see point P2 in FIG. 4) is defined as the upstream end (in other words, the upper end) of the oil discharge surface 37 in the oil flow direction. Point P2 also corresponds to the downstream end (in other words, the lower end) of the thread contact surface 36 in the oil flow direction. And, for example, the region of the thread contact surface 36 within 0.88 mm above point P2 is defined as the downstream end (in other words, the lower end) of the thread contact surface 36 in the oil flow direction. The above-mentioned separation point P1 is included in the downstream end of the thread contact surface 36 in the oil flow direction.

The pair of regulating walls 35 are formed in the front portion of the guide body 30 and are walls extending in the front-rear and up-down directions. The pair of regulating walls 35 are provided on both the left and right sides of the yarn contact surface 36 and the oil discharge surface 37. A pair of regulating surfaces 38 (regulating surfaces 38a, 38b) are formed on the inner sides of the pair of regulating walls 35 in the width direction. The pair of regulating surfaces 38 are formed at least on the outer sides of the yarn contact surface 36 and the oil discharge surface 37 in the width direction (in other words, both ends in the width direction of the flow path 31). The regulating surfaces 38a, 38b regulate the movement of the yarn Y in the width direction and prevent the oil flowing through the flow path 31 from spreading in the left-right direction.

Here, the present inventors have recently found that, depending on conditions such as the thickness of the yarn Y or the concentration of the oil, the oil supplied to the oil application guide 11 is prone to scattering or dripping without being collected. As a result of intensive research by the present inventors, it has been found that the scattering of the oil occurs due to the following reasons. That is, in the vicinity of the yarn Y immediately after it leaves the yarn contact surface 36, the oil may unintentionally accumulate in the space surrounded by the flow surface 34 (yarn contact surface 36 and oil discharge surface 37) and the regulating surfaces 38a and 38b (see space S in FIG. 4) due to the influence of surface tension, for example. If the oil accumulates unintentionally in this way, when the yarn Y leaves the oil application guide 11, the accumulated oil is dragged by the yarn Y and jumps out of the flow path 31. This is thought to cause the oil to scatter, etc.

This phenomenon becomes more pronounced as the yarn Y becomes thinner. When the yarn Y is thin, the oil flowing through the flow path 31 tends to flow downstream in the oil flow direction without coming into contact with the yarn Y (i.e., there is no possibility of the oil adhering to the yarn Y). This makes it easier for the oil to accumulate in the space S.

In recent years, the use of highly concentrated oils has been considered in order to reduce the amount of water contained in the oils and make it easier to evaporate the water. However, when highly concentrated oils are used, the following problems can occur. That is, highly concentrated oils generally have a high kinetic viscosity and are difficult to adhere to the yarn Y (for example, in a yarn Y consisting of multiple filaments f, the oil is difficult to penetrate between the filaments f). As a result, a large amount of oil flows downstream in the oil flow direction without adhering to the yarn Y. As a result, the oil is likely to accumulate in the space S.

Therefore, in order to prevent the unintended accumulation of oil that has not adhered to the yarn Y, the oil application guide 11 of the first embodiment is configured as follows.

(Detailed configuration of oil application guide)
The widthwise interval (hereinafter, simply referred to as "interval") between the portions of the pair of regulating surfaces 38 arranged on both sides of the widthwise direction of the yarn contact surface 36 is narrower toward the lower side (downstream side in the oil flow direction) in order to gather a plurality of filaments f. That is, as shown in FIG. 3, the interval (interval G2) at the position in the oil flow direction where the separation point P1 (see FIG. 4) is formed is narrower than the interval (interval G1) at the upstream end of the yarn contact surface 36 in the oil flow direction. Among the intervals between the regulating surfaces 38a and 38b arranged on both sides of the widthwise direction of the yarn contact surface 36, the interval G2 is the narrowest. Furthermore, the interval G2 is narrower than the conventional one, being 0.35 mm or less (the conventional interval is 0.53 mm).

This makes it easier for the oil flowing through the narrower parts of the flow path 31 to come into contact with the yarn Y (i.e., it is easier for it to adhere to the yarn). This makes it possible to reduce the amount of oil flowing downstream in the oil flow direction without adhering to the yarn, and as a result, the inventors believe that this makes it possible to prevent the oil from accumulating in the space S.

As described above, the gap G2 is the narrowest among the gaps between the restricting surfaces 38a and 38b arranged on both sides of the width of the yarn contact surface 36. Therefore, the space S is small at the separation point P1 and its periphery, so that the oil is prevented from accumulating in the space S, and the scattering of the oil is further prevented.

(Effectiveness verification test)
In order to confirm the effect of narrowing the gap G2 compared to the conventional case, the inventors of the present application conducted the following confirmation test: First, the inventors of the present application prepared eight pieces of each of the three types of test bodies (Example 1, Example 2, and Comparative Example) described below as oil application guides.

The conditions of the oil application guides in the examples and comparative examples will be specifically described. In example 1, the gap G1 is 1.2 mm, and the gap G2 is 0.35 mm. In example 2, the gap G1 is 0.9 mm, and the gap G2 is 0.27 mm. In the comparative example (conventional product), the gap G1 is 1.8 mm , and the gap G2 is 0.53 mm.

As an example of the yarn Y, two types of polyester FDY yarns (48 filaments, 55 decitex and 24 filaments, 44 decitex) were used. As an example of the oil, an oil with a mass percent concentration of 90% was used. Then, the yarn Y was run while the oil was supplied to the oil application guide 11, and the occurrence of scattering and dripping of the oil (presence or absence of scattering and dripping) was evaluated. The situation of whether the oil had scattered or not was specifically confirmed as follows. That is, for example, a green filter was attached to the Polarion Light NP-1 ("NP-1" is the model number) by Seeds-C Corporation, which can be used in clean rooms, and light was applied to the observation target area, and it was visually confirmed whether the oil had scattered or not. The observation range was 30 mm to 180 mm downward from the bottom end of the oil application guide.

First, the evaluation results using 55 decitex yarn Y are shown in the table at the top of Figure 5. In the table, a three-level evaluation (i.e., "none," "some scattering," and "some scattering and dripping") is given for the evaluation of "whether or not oil has scattered or dripped." "None" is an evaluation that indicates a good result in which neither oil has scattered nor dripped. "Some scattering" indicates that oil has scattered, but has not dripped. "Some scattering and dripping" indicates that both oil has scattered and dripped.

In Example 1, out of the eight test specimens, six were rated "absent", two were rated "scattered", and zero were rated "scattered and dripped". Similarly, in Example 2, out of the eight test specimens, six were rated "absent", two were rated "scattered", and zero were rated "scattered and dripped". In the comparative example, out of the eight test specimens, two were rated "absent", five were rated "scattered", and one was rated "scattered and dripped". Thus, by narrowing the gap G2 to 0.35 mm or less, the effect of suppressing scattering of the oil agent was significantly observed. The reason for this is thought to be that, as described above, the amount of oil agent flowing downstream in the oil agent flow direction without adhering to the yarn Y was reduced, and as a result, the accumulation of the oil agent in the above space was suppressed.

Next, the evaluation results using 44 dtex yarn Y are shown in the table at the bottom of Figure 5. Compared to when 55 dtex yarn Y was used, there was a tendency for the oil to splash and drip more. The reason for this is thought to be that, as mentioned above, of the oil flowing through flow channel 31, the oil flowing at both ends of flow channel 31 in the width direction tends to flow downstream in the oil flow direction without coming into contact with yarn Y (i.e., there is no possibility of it adhering to yarn Y).

In Example 1, there were 0 specimens rated as "absent", 3 specimens rated as "scattered", and 5 specimens rated as "scattered and dripped". In Example 2, there were 0 specimens rated as "absent", 6 specimens rated as "scattered", and 2 specimens rated as "scattered and dripped". In the comparative example, there were 0 specimens rated as "absent", 1 specimen rated as "scattered", and 7 specimens rated as "scattered and dripped". Thus, when the yarn Y was as thin as 44 decitex, the oil agent was scattered in all the specimens, but by narrowing the gap G2 to 0.35 mm or less, the effect of suppressing the dripping of the oil agent was observed. Thus, regardless of the thickness of the yarn Y, the scattering or dripping of the oil agent was suppressed by narrowing the gap G2.

As described above, the gap G2 is narrowed to 0.35 mm or less. This makes it easier for the oil flowing through the narrower portion of the flow path 31 to come into contact with the yarn Y (i.e., easier for it to adhere to the yarn Y). This reduces the amount of oil that flows downstream in the oil flow direction without adhering to the yarn Y, thereby preventing the oil from accumulating in the space S. This therefore prevents the oil that has not adhered to the yarn Y from unintentionally accumulating in the oil application guide 11.

Of the gaps between the restricting surfaces 38a and 38b arranged on both sides of the width of the yarn contact surface 36, the gap G2 is the narrowest. This makes it possible to reduce the space in which the oil can accumulate at the separation point P1 and its surroundings, thereby further suppressing the scattering of the oil.

In addition, since the spinning device 2 generally spins yarn at high speed, there is a high risk that unintentionally accumulated oil will be dragged along by the fast-moving yarn Y and scattered. It is particularly effective to apply the oil application guide 11 to such a spinning take-up machine 1 to prevent unintentional accumulation of oil that has not adhered to the yarn Y.

In addition, when applying oil to thin yarn Y of 55 decitex or less, the oil flowing through the flow path 31 and flowing at both ends of the flow path 31 in the width direction tends to flow downstream in the oil flow direction without coming into contact with the yarn Y (i.e., without the possibility of adhering to the yarn). For this reason, there is a risk that a large amount of oil will unintentionally accumulate in the oil application guide 11. It is particularly effective to apply the oil application guide 11 to such a spinning take-up machine 1 to prevent the unintentional accumulation of oil that has not adhered to the yarn Y.

In addition, oils with a high concentration of 85% or more by mass have a high kinetic viscosity and are difficult to adhere to the yarn Y. As a result, a large amount of oil flows downstream in the oil flow direction without adhering to the yarn Y. It is particularly effective to apply an oil application guide 11 to such a spinning take-up machine 1 to prevent the unintended accumulation of oil that does not adhere to the yarn Y.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to Fig. 6, Fig. 7(a) and (b). However, parts having the same configuration as those in the first embodiment are given the same reference numerals and their description will be omitted as appropriate. Fig. 6 is a front view of an oil application guide 40 according to the second embodiment. Fig. 7(a) is a cross-sectional view taken along line VII-VII in Fig. 6. Fig. 7(b) is an enlarged view of region R1 shown in Fig. 7(a).

The oil application guide 40 according to the second embodiment (see Figures 6, 7(a) and 7(b)) is a guide provided in the oil application device 3 (see Figure 1) of the spinning take-off machine 1 (see Figure 1), similar to the oil application guide 11 of the first embodiment.

(Structure of oil application guide)
The structure of the oil application guide 40 will be described. The oil application guide 40 has a guide body 50 (corresponding to the guide body 30 of the oil application guide 11) in which a flow path 51 (corresponding to the flow path 31 of the oil application guide 11) is formed. The flow path 51 has a supply hole 52, a discharge port 53, a flow surface 54 (yarn contact surface 56 and oil discharge surface 57), and a pair of regulating walls 55 (regulating walls 55a, 55b).

The supply hole 52 corresponds to the supply hole 32 of the oil application guide 11. The discharge port 53 corresponds to the discharge port 33 of the oil application guide 11. The flow surface 54 corresponds to the flow surface 34 of the oil application guide 11. The thread contact surface 56 corresponds to the thread contact surface 36 of the oil application guide 11. The oil discharge surface 57 corresponds to the oil discharge surface 37 of the oil application guide 11. The pair of regulating walls 55 correspond to the pair of regulating walls 35 of the oil application guide 11. The regulating walls 55 are formed with a regulating surface 58 (regulating surfaces 58a, 58b) corresponding to the regulating surface 38 of the oil application guide 11. In addition, a surface 59 corresponding to the surface 39 of the oil application guide 11 is formed above the discharge port 53. Below, the main similarities and differences between the oil application guide 40 and the oil application guide 11 are explained.

The lower end of the yarn contact surface 56 is defined in the same way as the oil application guide 11. That is, in a cross section perpendicular to the width direction (see FIG. 7(a)), the point where the yarn Y leaves the yarn contact surface 56 is defined as the separation point P3. Immediately after leaving the yarn contact surface 56, the yarn Y travels along a tangent to the yarn contact surface 56 with the separation point P3 as the contact point (that is, a part of the yarn path 102, which is the path of the yarn Y, corresponds to the above-mentioned tangent).

The upper end of the oil discharge surface 57 is connected to the lower end of the yarn contact surface 56. The oil discharge surface 57 is formed so that the further downstream in the oil flow direction it is, the further back from the yarn path 102 it becomes (see FIG. 7(a)). The oil discharge surface 57 is, for example, substantially planar over its entire length in the oil flow direction (i.e., substantially linear in a cross section perpendicular to the width direction).

The boundary between the thread contact surface 56 and the oil discharge surface 57 is defined, for example, as follows, in the same way as the oil application guide 11. That is, in a cross section perpendicular to the width direction, the point at which a straight line extending along the outer edge of the upstream part of the oil discharge surface 57 in the oil flow direction separates from the actual outer edge of the flow surface 54 (see point P4 in FIG. 7(a)) is defined as the upstream end (in other words, the upper end) of the oil discharge surface 57 in the oil flow direction. Point P4 also corresponds to the downstream end (in other words, the lower end) of the thread contact surface 56 in the oil flow direction. And, for example, the area of the thread contact surface 56 within 0.61 mm above point P4 is defined as the downstream end (in other words, the lower end) of the thread contact surface 56 in the oil flow direction. The separation point P3 is included in the downstream end of the thread contact surface 56 in the oil flow direction. In addition, the area of the oil discharge surface 57 that is within 3 mm behind point P4, for example, is defined as the upstream end of the oil discharge surface 57 in the oil flow direction.

In the oil application guide 40, a pair of regulating surfaces 58 are formed on both sides in the width direction of the thread contact surface 56. On the other hand, a pair of regulating surfaces 58 are not formed on both sides in the width direction of the oil discharge surface 57. In other words, in the flow path 51, there is a portion downstream of the separation point P3 in the oil flow direction where the regulating surfaces 58a, 58b are not formed. As a result, the space enclosed by the flow surface 54 and the regulating surfaces 58a, 58b (i.e., the space where the oil can accumulate) is smaller downstream of the separation point P3 in the oil flow direction. Note that in FIG. 7(a), a pair of regulating surfaces 58 are not formed on both sides in the width direction of the entire area of the oil discharge surface 57.

The widthwise distance between the regulating surfaces 58a and 58b (hereinafter simply referred to as "distance") becomes narrower toward the lower side (downstream side in the oil flow direction), similar to the oil application guide 11. That is, as shown in FIG. 5, the distance (distance G2) at the position in the oil flow direction where the separation point P3 is formed is narrower than the distance (distance G1) at the upstream end of the yarn contact surface 56 in the oil flow direction. Of the distances between the regulating surfaces 58a and 58b, distance G2 is the narrowest.

As shown in FIG. 7(a), in a cross section perpendicular to the width direction, the angle between the tangent of the yarn contact surface 56 (see the yarn path 102) that contacts the separation point P3 and the upstream end of the oil discharge surface 57 in the oil flow direction is θa. In this case, θa is preferably, for example, 50 degrees or more. The reason for this is that if θa is small, the effect of surface tension becomes large in the space between the yarn Y immediately after it leaves the yarn contact surface 56 and the oil discharge surface 57, and the oil may easily accumulate. By increasing θa to 50 degrees or more, the effect of surface tension is reduced, and the accumulation of oil in the space between the yarn Y and the oil discharge surface 57 can be suppressed. This configuration may also be applied to the oil application guide 11 of the first embodiment.

Also, as in the second embodiment, when the guide body 50 is arranged in a direction to bring the yarn Y traveling from above to below into contact with the yarn contact surface 56, the angle between the oil discharge surface 57 and a vertical line in a cross section perpendicular to the width direction is θb. More specifically, θb is the angle between the vertical line and the surface of the upstream end (as defined above) of the oil discharge surface 57 in the oil flow direction. θb is preferably, for example, 60 degrees or more and 72 degrees or less. By increasing θb to 60 degrees or more, the effect of surface tension is reduced, and the accumulation of oil in the space between the yarn Y and the oil discharge surface 57 can be suppressed. In addition, by reducing θb to 72 degrees or less, the orientation of the oil discharge surface 57 becomes closer to the vertical direction, and the component of gravity in the direction along the oil discharge surface 57 becomes larger. Therefore, the oil is smoothly discharged along the oil discharge surface by gravity. This configuration may be applied to the oil application guide 11 of the first embodiment.

As shown in FIG. 7(b), when the distance in the front-to-rear direction from the separation point P3 to the front end of the regulating wall 55 is L, the space enclosed by the flow surface 54 and the regulating surfaces 58a, 58b (space in which the oil can accumulate) can also be reduced by reducing L. However, if L is too short, there is a concern that the oil will leak to the front, so it is preferable that L is, for example, 0.75 mm or more. This configuration may be applied to the oil application guide 11 of the first embodiment.

(Effectiveness verification test)
In order to confirm the effect of not forming the regulating surfaces 58a, 58b on both sides in the width direction of the oil discharge surface 57 as described above, the inventor of the present application conducted the following confirmation test in the same manner as in the first embodiment. The inventor of the present application prepared eight of each of two types of test bodies (Example 2 described above and Example 3 described below) as the oil application guide. The test body of Example 3 is the oil application guide 40 according to the second embodiment. The test body of Example 3 has the same conditions as the test body of Example 2 (oil application guide 11) described above, except that the regulating surfaces 58a, 58b are not formed on both sides in the width direction of the oil discharge surface 57. That is, in the test body of Example 3, the interval G1 is 0.9 mm, and the interval G2 is 0.27 mm. In addition, the test conditions such as the type of yarn Y run and the concentration of the oil are the same as those of the confirmation test in the first embodiment.

First, the evaluation results using 55 decitex yarn Y are shown in the table at the top of the page in FIG. 8. In Example 3, of the eight test specimens, eight were rated "absent," zero were rated "scattered," and zero were rated "scattered and dripped." The evaluation results using 44 decitex yarn Y are shown in the table at the bottom of the page in FIG. 8. In Example 3, of the eight test specimens, eight were rated "absent," zero were rated "scattered," and zero were rated "scattered and dripped." It was confirmed that the scattering and dripping of the oil agent was suppressed regardless of the thickness of the yarn Y that was run. The reason for this is thought to be that, as described above, the space in which the oil agent can accumulate is small, thereby suppressing the oil agent from accumulating unintentionally.

As described above, downstream of the separation point P3 in the oil flow direction, there is a portion where the regulating surfaces 58a, 58b are not formed. This makes it possible to reduce the space enclosed by the flow surface 54 and the regulating surfaces 58a, 58b (i.e., the space in which the oil can accumulate) downstream of the separation point P3 in the oil flow direction. Therefore, it is possible to prevent the unintended accumulation of oil that has not adhered to the yarn Y in the oil application guide 40.

In addition, because the above-mentioned θa is large, at 50 degrees or more, the effect of surface tension can be reduced, and the accumulation of oil in the space between the yarn Y and the oil discharge surface 57 can be suppressed.

In addition, by setting the above-mentioned θb in the range of 60 degrees or more and 72 degrees or less, the effect of surface tension can be reduced, and the accumulation of oil in the space between the yarn Y and the oil discharge surface 57 can be suppressed. In addition, the component of gravity in the direction along the oil discharge surface 57 becomes large. Therefore, the oil can be smoothly discharged along the oil discharge surface 57 by gravity.

Next, we will explain a modified version of the second embodiment. However, parts that have the same configuration as the second embodiment will be given the same reference numerals and their explanations will be omitted as appropriate.

(1) Although the pair of regulating surfaces 58 are not formed at all on both sides in the width direction of the oil agent discharge surface 57, this is not limited to the above. For example, the pair of regulating surfaces 58 do not have to be formed on both sides in the width direction of the upstream end (as defined above) of the oil agent discharge surface 57 in the oil agent flow direction, and may be formed on both sides in the width direction of a portion other than the upstream end of the oil agent discharge surface 57. In other words, it is sufficient that the pair of regulating surfaces 58 are formed so as not to exist on both sides in the width direction of at least the upstream end of the oil agent discharge surface 57 in the oil agent flow direction.

(2) Although the gap G2 in the above-mentioned Example 3 is 0.27 mm (i.e., the gap G2 in Example 3 is the same as that in Example 2), the gap G2 is not limited to this value. In other words, since the regulating surfaces 58a, 58b are not formed on both sides in the width direction of the upstream end of the oil discharge surface 57 in the oil flow direction, the space in which the oil can accumulate can be reduced near the yarn Y immediately after it leaves the yarn contact surface 56. In this way, it is possible to prevent the oil that has not adhered to the yarn Y from unintentionally accumulating.

(3) Although it is preferable that θa is 50 degrees or more as described above, this is not limited to this. θa may be less than 50 degrees.

(4) Although it is preferable that θb be greater than or equal to 60 degrees and less than or equal to 72 degrees as described above, this is not limited thereto. θb may be less than 60 degrees or greater than 72 degrees.

(5) As described above, by increasing θa, it is possible to suppress the accumulation of oil in the space between the yarn Y and the oil discharge surface 57. On the other hand, if θb is also increased by increasing θa, the oil discharge surface 57 approaches horizontal, so the efficiency of oil discharge due to gravity may decrease (particularly, the effect of the decrease in discharge efficiency becomes large when the oil starts to flow before the yarn is run). More specifically, if the oil becomes difficult to discharge from the downstream part of the oil discharge surface 57 in the oil flow direction, the oil may easily accumulate in the upstream part of the oil discharge surface 57. Therefore, for example, as shown in FIG. 9, the oil discharge surface 61 of the oil application guide 60 does not have to be substantially flat as a whole, unlike the above-mentioned oil discharge surface 57. The oil discharge surface 61 has, for example, a first discharge surface 62 and a second discharge surface 63. The first discharge surface 62 is a surface formed immediately downstream of the yarn contact surface 56 in the oil discharge direction. In a cross section perpendicular to the width direction, the angle (first angle) between the first discharge surface 62 and the vertical line is θb as described above. The second discharge surface 63 is a surface formed downstream of the first discharge surface 62 in the oil discharge direction. The second discharge surface 63 is bent with respect to the first discharge surface 62. When the angle (second angle) between the second discharge surface 63 and the vertical line is θc in a cross section perpendicular to the width direction, θc is smaller than θb. As a result, even if θb is increased, θc can be made small, so that the decrease in the efficiency of oil discharge using gravity can be suppressed. More specifically, θc is preferably 50 degrees or less. The present inventor has found that by making θc small to 50 degrees or less, the decrease in the efficiency of oil discharge can be more reliably suppressed. This modified example may be applied to the oil application guide 11 of the first embodiment. In addition, θa and θb may be within the angle range shown in the second embodiment, for example, but are not necessarily limited to this.

Next, we will explain some variations common to the first and second embodiments.

(1) The yarn path 101 (yarn path 102) downstream of the separation point P1 (separation point P3) in the yarn running direction is the same as a tangent line that has the separation point P1 (separation point P3) as a contact point, but this is not limited to this. For example, the yarn contact surface 36 (yarn contact surface 56) may be substantially flat, and the yarn Y may be bent backward at a position where the yarn Y separates from the yarn contact surface 36 (yarn contact surface 56).

(2) Of the widthwise spacing between the pair of regulating surfaces 38 (pair of regulating surfaces 58), the above-mentioned spacing G2 is the narrowest, but this is not limited to this. For example, the spacing may be narrowest upstream or downstream of the position where separation point P1 (separation point P3) is formed in the oil flow direction.

(3) The oil application guides 11 and 40 are described as being provided on the spinning take-up machine 1, but are not limited to this. The oil application guides 11 and 40 may be provided on a textile machine other than the spinning take-up machine 1 that runs the yarn from above to below.

REFERENCE SIGNS LIST 1 spinning take-up machine 2 spinning device 5 take-up device 11 oil application guide 12 oiling device 30 guide body 31 flow path 36 yarn contact surface 37 oil discharge surface 38 regulating surface 40 oil application guide 50 guide body 51 flow path 56 yarn contact surface 57 oil discharge surface 58 regulating surface 101 yarn path 102 yarn path B bobbin G2 interval P1 separation point P3 separation point Y yarn θa angle θb angle (first angle)
θc angle (second angle)

Claims (10)

An oil application guide for applying an oil to a yarn traveling from above to below,
A guide body is provided with a flow path for causing the oil agent to flow downward,
The flow path is
a yarn contact surface where the yarn comes into contact and where the yarn separates from the yarn at a downstream end in an oil agent flow direction in which the oil agent flows;
an oil discharge surface for discharging the oil, the oil discharge surface being disposed downstream of the yarn contact surface in the oil flow direction and being formed so as to be farther away from a yarn path as it moves downstream in the oil flow direction;
a pair of regulating surfaces formed on both ends of the flow path in a width direction of the flow path,
An oil application guide characterized in that the distance between the pair of regulating surfaces in the width direction is 0.35 mm or less at the narrowest portion of the portions formed on both sides of the yarn contact surface in the width direction. An oil application guide for applying an oil to a yarn traveling from above to below,
A guide body is provided with a flow path for causing the oil agent to flow downward,
The flow path is
a yarn contact surface with which the yarn comes into contact and from which the yarn separates at a downstream end in an oil flow direction in which the oil flows;
an oil discharge surface for discharging the oil, the oil discharge surface being disposed downstream of the yarn contact surface in the oil flow direction and being formed so as to be farther away from a yarn path as it moves downstream in the oil flow direction;
a pair of regulating surfaces formed on both ends of the flow path in a width direction of the flow path,
The pair of regulating surfaces are
The yarn contact surface is formed on both sides in the width direction,
The oil discharge surface is not formed on both sides in the width direction of at least an upstream end portion in the oil flow direction,
When the guide body is oriented so as to bring the yarn traveling from above to below into contact with the yarn contact surface,
In a cross section perpendicular to the width direction,
An oil application guide characterized in that an angle between the oil discharge surface and a vertical line is 60 degrees or more and 72 degrees or less . When the guide body is oriented so as to bring the yarn traveling from above to below into contact with the yarn contact surface,
In a cross section perpendicular to the width direction,
2. The oil application guide according to claim 1, wherein an angle between the oil discharge surface and a vertical line is equal to or greater than 60 degrees and equal to or less than 72 degrees. The distance in the width direction between the pair of regulating surfaces formed on both sides of the yarn contact surface is:
The oil application guide according to any one of claims 1 to 3 , wherein the gap is narrowest at a position where the yarn leaves the yarn contact surface. In a cross section perpendicular to the width direction,
The oil application guide according to any one of claims 1 to 4, characterized in that an angle formed between a yarn path extending downstream in a yarn running direction from a point where the yarn leaves the yarn contact surface and an upstream end of the oil discharge surface in the oil flow direction is 50 degrees or more. The oil discharge surface is
A first discharge surface arranged downstream of the yarn contact surface in the oil flow direction;
a second discharge surface disposed further downstream than the first discharge surface in the oil flow direction and bent relative to the first discharge surface;
When the guide body is oriented so as to bring the yarn traveling from above to below into contact with the yarn contact surface,
In a cross section perpendicular to the width direction,
3. The oil application guide according to claim 1, wherein a second angle formed between the second discharge surface and a vertical line is smaller than a first angle formed between the first discharge surface and a vertical line. The oil application guide according to claim 6, characterized in that the second angle is 50 degrees or less. A spinning device for spinning yarn;
A take-up device that takes up the yarn spun from the spinning device and winds it onto a bobbin;
A spinning take-up machine comprising: an oil application guide according to any one of claims 1 to 7, which is arranged between the spinning device and the take-up device in the yarn running direction. The spinning take-off machine according to claim 8, characterized in that the spinning device is capable of spinning yarn having a thickness of 55 decitex or less. The spinning take-off machine according to claim 8 or 9, characterized in that it is provided with an oil supply device capable of supplying an oil having a mass percent concentration of 85% or more to the oil application guide.

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