JP7460115B2 - oiling nozzle - Google Patents

Description

The present invention relates to an oiling nozzle.

In the manufacturing process of synthetic fibers, an oiling nozzle is used to apply oil to the yarn spun from a spinning nozzle. The oiling nozzle is equipped with a discharge port (oil supply port) that discharges oil toward the yarn passing through the guide groove, and when the yarn passes through the guide groove, oil is attached to the yarn from the discharge port. (See Patent Document 1).

Japanese Patent Application Laid-Open No. 8-158140

With conventional oiling nozzles, it can be difficult for oil to adhere to the yarn depending on the situation. For example, when the yarn is thick, when the yarn contains a large number of filaments, when the oil has high viscosity, or when the amount of oil discharged is small.

The problem of the present invention is that in the oiling nozzle that applies oil to the yarn after spinning, the oil is applied to the yarn while the yarn is opened, so that even under bad conditions, the oil does not adhere to the yarn insufficiently. The purpose is to suppress the problems that occur.

The first invention of the present invention is an oiling nozzle that includes a guide groove that guides multiple yarns after spinning so that they pass along the bottom surface, and an oil supply port that opens into the bottom surface of the guide groove and applies oil to the yarns passing through the guide groove. The area where the yarns contact the bottom surface of the guide groove includes a first portion that has a convex cross-sectional shape in a direction transverse to the direction in which the yarns pass, and the convex shape is shaped to flatten and open the bundle of yarns that contacts it along the bottom surface due to the contact pressure with the bottom surface.

According to the first invention, the yarn bundle passing through the guide groove is flattened and opened by the first portion having a convex cross-sectional shape. This makes it easier for oil from the oil supply port to penetrate into the yarn bundle, suppressing the problem of insufficient oil adhesion to the yarn.

The second invention of the present invention is the first invention, in which the region where the yarn contacts the bottom surface of the guide groove is provided with, in addition to the first portion, a second portion whose cross-sectional shape in a direction transverse to the yarn passing direction is flat, U-shaped, or V-shaped, and the second portion is downstream of the first portion as viewed in the yarn passing direction, and the flat, U-shaped, or V-shaped shape converges the yarn that has been opened by the convex shape of the first portion before contacting it, at least by reducing the contact pressure.

According to the second aspect of the invention, the yarn is spread at the first portion and oil is applied thereto, and then the yarn is converged at the second portion. Therefore, the oil attached to the yarn is easily retained.

A third aspect of the present invention is that in the first aspect, in addition to the first portion, a region in which the yarn contacts on the bottom surface of the guide groove has a flat cross-sectional shape in a direction transverse to the yarn passing direction. and a 22nd portion having the same cross-sectional shape as U-shape or V-shape. The first section, the 21st section, and the 22nd section are arranged in this order from the upstream side when viewed from the upstream side. The threads are shaped to converge due to a decrease in the contact pressure, and the U-shape or V-shape allows the threads converged by the flat shape of the 21st portion to be guided by the The shape of the groove is further converged by the contact pressure of the side wall forming the U-shape or V-shape of the groove.

According to the third aspect of the invention, the thread is spread in the first part and oil is applied thereto, and then the thread is sequentially converged through the 21st part and the 22nd part. Therefore, the yarns are stably converged after opening.

The fourth invention of the present invention is the second invention, in which the guide width of the yarn at the bottom surface of the guide groove is wider in the first region than in the second region.

According to the fourth invention, the guide width of the yarn in the first section is wider than that in the second section. This makes it easier to open the yarn.

The fifth aspect of the present invention is the third aspect, in which the guide width of the yarn at the bottom surface of the guide groove is wider in the first portion than in the 21st portion, and wider in the 21st portion than in the 22nd portion.

According to the fifth invention, the yarn guide width in the first region is wider than that in the 21st region. Also, the yarn guide width in the 21st region is wider than that in the 22nd region. This makes it easier to open the yarn.

A sixth aspect of the present invention is that in the second or fourth aspect, a 31st part is provided between the first part and the second part on the bottom surface of the guide groove, and the 31st part is a part of the yarn. The cross-sectional shape in the direction crossing the passing direction is changed from a convex shape to a flat shape, a U-shape, or a V-shape.

According to the sixth aspect of the invention, the threads are spread in the first part and oil is applied thereto, and then the threads are converged in the second part, but the yarns are not converged in the 31st part on the upstream side. It is done gradually. Therefore, the yarns are stably converged after opening.

The seventh aspect of the present invention is any of the second, fourth or sixth aspects, in which a 31st portion is provided between the first portion and the second portion on the bottom surface of the guide groove, and the bottom surface of the 31st portion is recessed relative to the bottom surfaces of the first portion and the second portion to form an oil reservoir.

According to the seventh invention, an oil pool is formed at the 31st portion between the first portion and the second portion. Therefore, excess oil attached to the yarn is received in the oil pool. On the other hand, if there is insufficient oil attached to the yarn passing through the oil pool, the oil in the oil pool is attached to the yarn. Therefore, the oil pool can adjust the excess or deficiency of oil attached to the yarn. Moreover, because the oil pool is downstream of the first portion, the yarn passing through the oil pool is in an open state, making it easy to adjust the excess or deficiency of oil.

The eighth aspect of the present invention is the third or fifth aspect of the present invention, in which a 32nd portion is provided between the first portion and the 21st portion, and a 33rd portion is provided between the 21st portion and the 22nd portion on the bottom surface of the guide groove, and the 32nd portion and the 33rd portion have their bottom surfaces recessed relative to the bottom surfaces of the 1st portion, the 21st portion and the 22nd portion to form oil reservoirs, respectively.

According to the eighth invention, oil reservoirs are formed in the 31st part between the first part and the 21st part, and in the 32nd part between the 21st part and the 22nd part. Therefore, in each oil reservoir, it is possible to adjust the excess or deficiency of oil attached to the threads, similarly to the oil reservoir of the seventh invention. Moreover, since the oil reservoirs are located downstream of the first section and downstream of the 21st section, the threads passing through the oil reservoirs are in an opened state or a state in the process of convergence, making it difficult to adjust the excess or deficiency of oil. Easy to do.

The ninth aspect of the present invention is any one of the first to eighth aspects, in which the first portion is a portion in which the oil supply port is formed on the bottom surface of the guide groove, and at least a portion of the first portion is constituted by the upstream edge or downstream edge of the oil supply port when viewed in the yarn passing direction.

According to the ninth invention, the yarn is opened in correspondence with the oil supply port. Therefore, the oil from the oil supply port can easily permeate the yarn bundle, and the problem of insufficient oil adhesion to the yarn can be suppressed.

1 is a schematic diagram of a fiber manufacturing apparatus equipped with an oiling nozzle according to a first embodiment of the present invention. FIG. 2 is an enlarged view of part II of the fiber manufacturing apparatus shown in FIG. 1 . FIG. 3 is a front view of the oiling nozzle according to the first embodiment. FIG. 2 is a side view of the oiling nozzle according to the first embodiment. FIG. 2 is a rear view of the oiling nozzle according to the first embodiment. 6 is a cross-sectional view taken along line VI-VI in FIG. 3. 4 is a cross-sectional view taken along the line VII-VII in FIG. 3; FIG. FIG. 4 is a cross-sectional view taken along line VIII-VIII in FIG. 3; 4 is a cross-sectional view taken along line IX-IX in FIG. 3; FIG. 4 is an explanatory diagram showing an enlarged bottom surface of a guide groove of the oiling nozzle according to the first embodiment. FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 10. FIG. 12 is a cross-sectional view taken along line XII-XII of FIG. 10. 11 is a cross-sectional view taken along the line XIII-XIII in FIG. 10; FIG. FIG. 2 is a front view showing a state in which a yarn is passed through a guide groove of the oiling nozzle according to the first embodiment. It is a bar graph showing the result of testing the amount of oil adhering to the yarn by passing the yarn through the guide groove of the oiling nozzle according to the first embodiment. FIG. 6 is a front view of an oiling nozzle according to a second embodiment of the present invention. FIG. 7 is a rear view of the oiling nozzle according to the second embodiment. FIG. 17 is a cross-sectional view taken along the line XVIII-XVIII in FIG. 16; 17 is a cross-sectional view taken along the line XIX-XIX in FIG. 16. FIG. FIG. 17 is a cross-sectional view taken along line XX-XX in FIG. 16; FIG. 11 is a front view of an oiling nozzle according to a third embodiment of the present invention. It is a side view of the oiling nozzle based on the said 3rd Embodiment. FIG. 11 is a rear view of the oiling nozzle according to the third embodiment. 22 is a cross-sectional view taken along the line XXIV-XXIV in FIG. 21. FIG. This is a cross-sectional view taken along the line XXV-XXV in Figure 21. 22 is a cross-sectional view taken along the line XXVI-XXVI in FIG. 21. FIG.

<Configuration of fiber manufacturing equipment>
FIG. 1 shows a fiber manufacturing apparatus 11 including an oiling nozzle 20 according to a first embodiment of the present invention. The fiber manufacturing apparatus 11 includes a spinning nozzle 13, an oiling nozzle 20, a plurality of guides 14, godet rollers 15a, 15b, interlacers 17a, 17b, and a winder 19. The fiber manufacturing apparatus 11 melts a polymer, which is a raw material for fibers, and extrudes it from the spinning nozzle 13 to form a plurality of threads Y, which are then cooled and solidified. The solidified threads Y first pass through the oiling nozzle 20. While guiding the threads Y, the oiling nozzle 20 applies oil containing a lubricant or the like to the threads Y in order to reduce damage to the threads Y in the subsequent process and to improve the cohesion of the threads Y. The threads Y are then stretched by godet rollers 15a, 15b with different rotation speeds, and are subjected to an interlacing process by blowing compressed air onto the threads Y by the interlacers 17a, 17b, and are then wound up by the winder 19. Along the way, the yarn Y is guided by a plurality of guides 14 and the like.

FIG. 2 shows an enlarged view of the oiling nozzle 20 and its vicinity. The oiling nozzle 20 includes a guide groove 21 that guides the yarn Y. A discharge port (oil supply port) 22 for discharging oil is formed at the bottom of the guide groove 21 . A connecting pipe 16 is connected to the fitting hole 25 communicating with the discharge port 22, and oil is supplied from the pump 12 via the connecting pipe 16 and the conduit 18. Therefore, the yarn Y discharged from a large number of holes formed in the spinning nozzle 13 is sent from the top to the bottom as shown by the arrow in the figure and enters the guide groove 21, where it becomes one yarn. It is bundled by the threads Y, passes through the guide groove 21 while being pressed against the bottom surface, and comes into contact with the oil discharged from the discharge port 22. As a result, the oil is attached to the yarn Y.

<Configuration of Oiling Nozzle (First Embodiment)>
3 to 9 show the oiling nozzle 20 alone. In each figure, the directions indicated by the arrows indicate the respective directions when the oiling nozzle 20 is installed in the fiber production apparatus 11 as shown in Fig. 1. In this case, the direction in which the yarn Y passes through the guide groove 21 of the oiling nozzle 20 is defined as the up-down direction. However, this direction is only one example of how the oiling nozzle 20 can be used, and does not prevent it from being used in other directions.

The oiling nozzle 20 is made of ceramics and forms a guide groove 21 extending in the vertical direction. Examples of ceramics include alumina, and various ceramics that form conventional oiling nozzles and yarn guides can be used. The oiling nozzle 20 may also be made of metals, resins, etc. other than ceramics, and surface-treated to have the same durability as ceramics. The guide groove 21 is formed with the vertical direction as the longitudinal direction along the passing direction of the yarn Y. The yarn Y passes from above to below along the guide groove 21. The oiling nozzle 20 is in the shape of a block having both left and right side surfaces 20b, 20c, a rear surface 20d, an upper surface 20e, and a lower surface 20f, when the surface having the recess that forms the guide groove 21 is the front surface 20a and the width direction of the guide groove 21 is the left-right direction. Its external shape is trapezoidal when viewed from the side, as shown in FIG. 4, and the shape of the sides 20b and 20c is such that the front and rear sides are parallel to each other, and the upper and lower sides are inclined relative to the front and rear sides. In addition, the sides 20b and 20c have recesses 26.

The guide groove 21 is formed penetrating the oiling nozzle 20 from top to bottom. As shown in FIG. 3, the guide groove 21 extends straight from the end on the upper surface 20e side (upstream side) to the end on the lower surface 20f side (downstream side) without bending in the width direction. However, as shown in FIG. 6, the bottom surface 23 of the guide groove 21 is formed such that the middle part of the bottom surface 23 bulges forward from both ends corresponding to the end on the upper surface 20e side (upstream side) and the end on the lower surface 20f side (downstream side).

The bottom surface 23 of the guide groove 21 has a cross-sectional shape in a direction transverse to the passing direction of the yarn Y that differs depending on the vertical position. First, the portion 23a of the bottom surface 23 that the passing yarn Y first comes into contact with is flat, and the downstream portion (hereinafter referred to as the first portion) 23b of the discharge port 22 is convex toward the front surface 20a as shown in FIG. 7. In other words, the downstream edge portion 22a of the discharge port 22 constitutes a part of the first portion 23b (see FIG. 6). In addition, the downstream portion (hereinafter referred to as the 21st portion) 23c of the first portion 23b is flat as shown in FIG. 8, and the downstream portion (hereinafter referred to as the 22nd portion) 23d of the 21st portion 23c is U-shaped and recessed as shown in FIG. 9. Furthermore, the portion 23e downstream of the 22nd portion 23d is either flat in cross section like the 21st portion 23c or U-shaped and recessed like the 22nd portion 23d. The convex shape of the first portion 23b is, for example, a convex shape with R = 3 mm, and the U-shape of the 22nd portion 23d is, for example, a U-shape with a rounded portion with R = 0.75 mm. Of course, the numerical values of the convex shape and the U-shape are not limited to these numerical values.

The bottom surface 23 of the guide groove 21 is formed so that the guide width (left-right width) of the yarn Y gradually narrows from the upstream side to the downstream side as shown in FIG. 3. In the portion 23a of the bottom surface 23, the guide width gradually narrows from the middle in the vertical direction toward the downstream side, and in the first portion 23b, the same width as the guide width of the portion 23a is maintained. In the 21st portion 23c and the 22nd portion 23d, the guide width gradually narrows continuously from the upstream side to the downstream side. In the portion 23e downstream of the 22nd portion 23d, the guide width of the most downstream side of the 22nd portion 23d is maintained to be a constant width. Incidentally, the guide width W of the yarn Y of the first portion 23b shown in FIG. 7 is, for example, about 2.5 mm, and the guide width W of the yarn Y of the 21st portion 23c shown in FIG. 8 is, for example, about 2.4 mm. Furthermore, both ends of the convex shape of the first portion 23b are rounded by 0.2 mm, and both ends of the flat shape of the 21st portion 23c are rounded by 0.2 mm. Of course, the values of the guide width W, etc. are not limited to these values.

The discharge port 22 is opened between the portion 23a and the first portion 23b of the bottom surface 23. Here, the opening of the discharge port 22 is set to be equal to the guide width of the first portion 23b.

As shown in FIGS. 3 and 6, on the bottom surface 23 of the guide groove 21, three oil reservoirs 24 are formed in the vertical direction, extending horizontally across the guide groove 21. The most upstream oil reservoir 24a is provided between the first section 23b and the 21st section 23c, and the next oil reservoir 24b is provided between the 21st section 23c and the 22nd section 23d. . Further, an oil reservoir 24c on the most downstream side is provided between the 22nd portion 23d and the portion 23e. Each of the oil reservoirs 24 has the same shape, and by recessing the bottom surface 23 in the form of a groove, the oil reservoirs 24 can receive excess oil from the oil deposited on the yarn Y at the discharge port 22. On the other hand, if the oil attached to the yarn Y passing through the oil reservoir 24 is insufficient, the oil trapped in the oil reservoir 24 is attached to the yarn Y. In this way, excess or deficiency of oil attached to the yarn Y is adjusted by the oil reservoir 24. Note that the region where the oil reservoir 24a is formed corresponds to the 32nd region in the present invention, and the region where the oil reservoir 24b is formed corresponds to the 33rd region in the present invention.

<Functions and Effects of the Oiling Nozzle (First Embodiment)>
When the yarn Y passes through the guide groove 21 of the oiling nozzle 20 as shown in Figure 2, the yarn Y spreads out in the left and right directions on the upstream side of the guide groove 21 as shown in Figure 14, and gradually converges as it moves downstream.

In the portion 23a where the yarn Y first passes through the guide groove 21 of the oiling nozzle 20, the guide width of the guide groove 21 in the left and right direction is widened, so the yarn Y naturally spreads in the left and right direction. Ru. Next, when the yarn Y passes through the first portion 23b of the guide groove 21, the yarn Y rests on the convex shape of the first portion 23b, so that the contact pressure with the convex shape is large, as shown in FIG. and is maintained in a state where it spreads in the left and right direction. Oil is attached to the yarn Y by the discharge port 22 between the portion 23a and the first portion 23b, but as described above, the yarn Y is spread in the left-right direction and is in an open state. The oil is attached so as to penetrate between the plurality of threads Y. That is, the oil is efficiently attached to the yarn Y.

When the yarn Y passes through the 21st portion 23c, the left and right width of the yarn Y is slightly narrower than when it passes through the first portion 23b, and the yarn Y is slightly converged (see FIG. 12). This is because the bottom surface shape of the 21st portion 23c is flat, and the contact pressure between the yarn Y and the 21st portion 23c of the bottom surface 23 is reduced. Further, in the 21st portion 23c, the guide width of the guide groove 21 is narrower than that in the first portion 23b, and the contact pressure between the yarn Y and the side wall of the guide groove 21 increases. After that, when the yarn Y passes through the 22nd section 23d, the left and right width of the yarn Y is further narrowed and becomes more converged than when it passes through the 21st section 23c (see FIG. 13). This is because, in the 22nd portion 23d, the bottom surface shape is U-shaped, and the guide width of the guide groove 21 is narrower than that in the 21st portion 23c, so that the thread Y and the U-shaped side wall of the guide groove 21 are This is because the contact pressure increases. When the yarn Y finally passes through the bottom surface 23e of the guide groove 21, although the bottom surface shape of this portion is flat, the guide width of the guide groove 21 is narrowed like the 22nd portion 23d. Therefore, the yarn Y is maintained in a converged state by the contact pressure with the side wall of the guide groove 21.

As described above, the oil reservoir 24 is provided on the bottom surface 23 of the guide groove 21, so that the amount of oil adhering to the yarn Y can be adjusted. In particular, since the oil reservoir 24a is downstream of the first portion 23b, and the oil reservoir 24b is downstream of the 21st portion 23c, the yarn Y passing through the oil reservoirs 24a and 24b is in an open state or in the process of converging, so that the amount of oil can be easily adjusted.

Figure 15 shows the oil adhesion rate (OPU = oil weight/weight of yarn Y) on yarn Y when it is passed through the oiling nozzle 20 of the first embodiment. The test to measure the oil adhesion rate was conducted twice with a time gap, and it was confirmed that the oil adhesion rate was significantly better than that of the comparative example in both cases. Note that in the comparative example, the bottom surface 23 of the guide groove 21 has an overall flat shape (the same shape as the 21st portion 23c in the first embodiment).

According to the oiling nozzle 20 of the first embodiment, the bundle of yarns Y passing through the guide groove 21 is flattened and opened by the first portion 23b having a convex cross section. Therefore, the oil from the oil discharge port 22 is likely to be impregnated into the bundle of yarns Y, and it is possible to suppress the problem of insufficient oil adhesion to the yarns Y.

Further, the yarn Y is spread and coated with oil at the first section 23b, and then gradually converged at the 21st section 23c and the 22nd section 23d. Therefore, the oil attached to the yarn Y is easily retained inside the yarn Y. Therefore, it is possible to suppress the problem that oil is scattered from the yarn Y passing through the oiling nozzle 20 and the area around the oiling nozzle 20 is contaminated with the scattered oil.

Further, the yarn Y is spread in the first portion 23b and oil is applied thereto, and then converged sequentially through the 21st portion 23c and the 22nd portion 23d. Therefore, the yarn Y after opening is stably converged.

The guide width of the yarn Y at the first portion 23b is wider than that at the 21st portion 23c. The guide width of the yarn Y at the 21st portion 23c is wider than that at the 22nd portion 23d. This makes it easier to open the yarn Y.

Further, the first portion 23b is a portion that forms the downstream end edge of the discharge port 22. Therefore, the yarn Y is opened in correspondence with the discharge port 22, and the oil from the discharge port 22 is likely to be impregnated into the bundle of yarn Y, resulting in insufficient adhesion of oil to the yarn Y. It is possible to suppress such problems.

<Second embodiment>
16-20 show an oiling nozzle 30 as a second embodiment of the invention. The features of the oiling nozzle 30 of the second embodiment compared to the oiling nozzle 20 of the first embodiment are as follows. That is, in the oiling nozzle 20, the bottom surface 23 of the guide groove 21 has, from the upstream side toward the downstream side, a first portion 23b with a convex cross section, a 21st portion 23c with a flat cross section, and a 22nd portion with a U-shaped cross section. It was set as 23d. On the other hand, in the oiling nozzle 30, from the upstream side to the downstream side, a first portion 33b having a convex cross section, a second portion 33d and a portion 33e having a flat cross section, and the first portion 33b and the second portion 33d. The 31st portion 33c between the two portions has a configuration that gradually changes from a convex cross-sectional shape to a flat cross-sectional shape. The second portion 33d and the portion 33e may have a U-shaped cross section. In that case, the 31st portion 33c has a configuration that gradually changes from a convex cross-sectional shape to a U-shaped cross-section. Further, in the oiling nozzle 30, the discharge port 32 is opened at the bottom surface of the first portion 33b. In other words, the upstream edge 32a and the downstream edge 32b of the discharge port 32 constitute a part of the first portion 33b. On the other hand, six oil reservoirs 34 are provided at approximately equal intervals from the downstream side of the first portion 33b to the upstream side of the portion 33e. Each of the oil reservoirs 34 on the upstream side is larger in size in each of the up-down, front-back, and left-right directions than the one on the downstream side. In addition, the oiling nozzle 30 is slightly different in size and shape from the oiling nozzle 20, but there is no essential difference. Note that in FIGS. 16 to 20 as well, each direction of the oiling nozzle 30 is indicated by an arrow as in the first embodiment.

In the oiling nozzle 30, the portion 33a upstream of the first portion 33b of the bottom surface 33 of the guide groove 31 has a flat cross-sectional shape. The convex shape of the first portion 33b is, for example, a convex shape with R = 6 mm, and the guide width W of the yarn Y of the first portion 33b shown in Figure 19 is, for example, about 2.3 mm. The guide width W of the yarn Y of the second portion 33d shown in Figure 20 is, for example, about 1 mm. Furthermore, both ends of the convex shape of the first portion 33b are rounded by 0.3 mm, and both ends of the flat shape of the second portion 33d are also rounded by 0.3 mm. Of course, the numerical values of the convex shape, guide width W, etc. are not limited to these numerical values.

A fitting hole 35 is provided on the rear side of the discharge port 32 into which the connecting tube 16 similar to that of the first embodiment is fitted and connected. The left and right width of the opening at the bottom surface 33 of the discharge port 32 is slightly smaller than the left and right width of the first portion 33b. However, the left and right width of the opening of the discharge port 32 is larger than the left and right spread width of the yarn Y when the yarn Y is spread by the first portion 33b. Therefore, the opening width of the discharge port 32 does not affect the adhesion of oil to the yarn Y.

In the oiling nozzle 30, the yarn Y is spread at the front of the discharge port 32 by the bottom surface of the first portion 33b, which is located upstream and downstream of the discharge port 32 and has a convex cross-sectional shape. Therefore, the oil from the oil discharge port 32 is easily impregnated into the bundle of yarn Y, and the problem of insufficient oil adhesion to the yarn Y can be suppressed. The yarn Y that passes through the first portion 33b is gradually converged at the 31st portion 33c and the second portion 33d. While the yarn Y passes through the first portion 33b, the 31st portion 33c, the second portion 33d, and the portion 33e of the bottom surface 33, the excess or deficiency of the amount of oil attached to the yarn Y is adjusted by each oil reservoir 34.

Third Embodiment
Figures 21 to 26 show an oiling nozzle 40 according to a third embodiment of the present invention. The oiling nozzle 40 of the third embodiment is characterized by the fact that the shape of the oil reservoir 44 in the oiling nozzle 40 is changed from the oil reservoir 34 in the oiling nozzle 30. The oiling nozzle 40 is slightly different in shape from the oiling nozzle 30, but there is no essential difference. Note that in Figures 21 to 26, the directions of the oiling nozzle 40 are indicated by arrows, as in the first and second embodiments.

In the oiling nozzle 40, the oil pools 44 on the bottom surface 43 of the guide groove 41 have a smaller recessed depth and vertical width per pool compared to the oil pools 34 of the oiling nozzle 30. The left-right width of the oil pools 44 is also set to match the left-right width of the bottom surface 43. Meanwhile, the number of oil pools 44 is set to 10.

The bottom surface 43 of the oiling nozzle 40 has a convex cross-section at the first portion 43b, and a flat cross-section at the upstream portion 43a. On the other hand, the second portion 43d and the downstream portion 43e have a flat cross-section, and the 31st portion 43c between the first portion 43b and the second portion 43d is configured to gradually change from a convex cross-section to a flat cross-section. The second portion 43d and the portion 43e may have a U-shaped cross-section. In that case, the 31st portion 43c is configured to gradually change from a convex cross-section to a U-shaped cross-section. The discharge port 42 is opened at the bottom surface of the first portion 43b. A fitting hole 45 is provided on the rear side of the discharge port 42, into which the connecting pipe 16 similar to that of the first embodiment is fitted and connected. As shown in Figures 21 and 22, the oiling nozzle 40 has a recess 46.

The convex shape of the first portion 43b is, for example, a convex shape with R = 6 mm, and the guide width W of the yarn Y of the first portion 43b shown in Figure 25 is, for example, about 2.3 mm. The guide width W of the yarn Y of the second portion 43d shown in Figure 26 is, for example, about 1 mm. Furthermore, both ends of the convex shape of the first portion 43b are rounded by 0.3 mm, and both ends of the flat shape of the second portion 43d are also rounded by 0.3 mm. Of course, the numerical values of the convex shape, guide width W, etc. are not limited to these numerical values.

In the oiling nozzle 40, the yarn Y is spread at the front of the discharge port 42 by the bottom surface of the first portion 43b, which has a convex cross section, located upstream and downstream of the discharge port 42. Therefore, the oil from the discharge port 42 is easily impregnated into the bundle of yarn Y, and the problem of insufficient oil attachment to the yarn Y can be suppressed. The yarn Y that passes through the first portion 43b is gradually converged at the 31st portion 43c and the second portion 43d. While the yarn Y passes through the first portion 43b, the 31st portion 43c, the second portion 43d, and the portion 43e of the bottom surface 43, the excess or deficiency of the amount of oil attached to the yarn Y is adjusted by each oil reservoir 44.

<Other embodiments>
The present invention can be embodied in various forms other than the above-mentioned embodiment. For example, in the first embodiment, the bottom surface of the guide groove is provided with the first portion, the 21st portion, and the 22nd portion, and in the second and third embodiments, the bottom surface of the guide groove is provided with the first portion and the second portion. However, the bottom surface of the guide groove may be provided with only the first portion. In the first embodiment, the 22nd portion has a U-shaped cross section in a direction transverse to the yarn passing direction. However, the cross section may be V-shaped. Furthermore, in the second and third embodiments, the second portion has a flat cross section in a direction transverse to the yarn passing direction. However, the cross section may be U-shaped or V-shaped.

In the second and third embodiments, a 31st part is provided between the first part and the second part, and the 31st part has a cross-sectional shape in a direction crossing the yarn passing direction from a convex shape to a flat shape. It was decided to change. However, the 31st portion may not be provided.

In the first to third embodiments, the first portion is constituted by the downstream end edge of the oil supply port (discharge port), or the upstream end edge and the downstream end edge when viewed in the yarn passing direction. . However, as long as the yarn can be opened at a position corresponding to the oil supply port (discharge port), the first portion may be provided at a position other than the above.

In the first embodiment (similar to the second and third embodiments), the contact area of the yarn with the bottom surface of the guide groove is in the range of A1 to B1 in FIG. 10. However, the contact area of the yarn with the bottom surface of the guide groove can be arbitrarily selected from the range of A1, A2, A3 to B1, B2, B3 in FIG. 10. A1 is the upstream part of the first part 23b, A2 is the upstream end part of the first part 23b, and A3 is the intermediate part upstream and downstream of the first part 23b. Also, B1 is the downstream part of the 22nd part 23d, B2 is the downstream end part of the 22nd part 23d, and B3 is the intermediate part upstream and downstream of the 22nd part 23d.

In the first to third embodiments, an oil reservoir is provided at the bottom of the guide groove, but the oil reservoir may not be provided.

REFERENCE SIGNS LIST 11 Fiber manufacturing device 12 Pump 13 Spinning nozzle 14 Guide 15a, 15b Godet roller 16 Connecting pipe 17a, 17b Interlacer 18 Conduit 19 Winder 20, 30, 40 Oiling nozzle 20a Front surface 20b, 20c Side surface 20d Rear surface 20e Top surface 20f Bottom surface 21, 31, 41 Guide groove 22, 32, 42 Discharge port (oil supply port)
22a, 32b: downstream edge portion 32a: upstream edge portion 23, 23a, 23e, 33, 33a, 33e, 43, 43a, 43e: bottom surface (portion)
23b, 33b, 43b Bottom surface (first portion)
23c bottom surface (21st part)
23d bottom surface (22nd part)
24, 24c, 34, 44 Oil reservoir 24a Oil reservoir (part 32)
24b Oil reservoir (part 33)
25, 35, 45 Fitting holes 26, 46 Cutting recesses 33c, 43c Bottom surface (31st portion)
33d, 43d Bottom surface (second portion)

Claims (8)

a guide groove that guides the plurality of threads after spinning to pass along the bottom surface;
An oiling nozzle comprising an oil supply port that opens at the bottom of the guide groove and applies oil to the yarn passing through the guide groove,
A region where the thread comes into contact with the bottom surface of the guide groove includes a first portion having a convex cross-sectional shape in a direction transverse to the thread passing direction;
The convex shape is such that the bundle of threads in contact therewith is flattened and opened along the bottom surface by the contact pressure of the bottom surface,
In addition to the first part, in the area where the thread comes into contact with the bottom surface of the guide groove, there is a second part having a flat, U-shaped, or V-shaped cross section in a direction transverse to the thread passing direction. Equipped with parts,
The second portion is located downstream of the first portion when viewed in the thread passing direction,
The flat shape, U-shape, or V-shape is a shape that converges the yarn spread by the convex shape of the first portion before contacting therewith by reducing the contact pressure with at least the bottom surface. oiling nozzle. A guide groove that guides the multiple yarns after spinning so that they pass along the bottom surface;
an oil supply port that opens to a bottom surface of the guide groove and applies oil to the yarn passing through the guide groove,
a first portion having a convex cross-sectional shape in a direction transverse to the yarn passing direction in a region where the yarn comes into contact with the bottom surface of the guide groove;
The convex shape is a shape that flattens and spreads the yarn bundle in contact therewith along the bottom surface by the contact pressure of the bottom surface,
In addition to the first portion, a region where the yarn comes into contact with the bottom surface of the guide groove is provided with a 21st portion having a flat cross-sectional shape in a direction transverse to the yarn passing direction, and a 22nd portion having the same cross-sectional shape as the 21st portion, which is U-shaped or V-shaped;
The first portion, the 21st portion, and the 22nd portion are arranged in this order from the upstream side as viewed in a yarn passing direction, the first portion, the 21st portion, and the 22nd portion,
the flat shape is a shape that converges the yarns, which have been spread by the convex shape of the first portion before contacting the flat shape, by reducing a contact pressure with the bottom surface,
The U-shaped or V-shaped oiling nozzle is shaped to further converge the yarn, which has been converged by the flat shape of the 21st portion before contacting it, by the contact pressure of the U-shaped or V-shaped side wall of the guide groove. The oiling nozzle of claim 1 ,
An oiling nozzle, wherein a guide width of the yarn at a bottom surface of the guide groove is wider in the first portion than in the second portion. The oiling nozzle of claim 2 ,
The oiling nozzle according to claim 1, wherein the guide width of the yarn at the bottom surface of the guide groove is wider at the first portion than at the second portion, and wider at the second portion than at the third portion. The oiling nozzle according to claim 1 or 3 ,
a 31st portion is provided between the first portion and the second portion on a bottom surface of the guide groove;
The 31st portion is an oiling nozzle whose cross-sectional shape in a direction transverse to the yarn passing direction is gradually changed from the convex shape to the flat shape, U-shape, or V-shape. The oiling nozzle according to any one of claims 1, 3, and 5 ,
a 31st part is provided between the first part and the second part on the bottom surface of the guide groove,
The 31st section is an oiling nozzle whose bottom surface is depressed relative to the bottom surfaces of the first section and the second section to form an oil reservoir. The oiling nozzle according to claim 2 or 4 ,
a 32nd portion is provided between the 1st portion and the 21st portion on a bottom surface of the guide groove, and a 33rd portion is provided between the 21st portion and the 22nd portion,
The 32nd portion and the 33rd portion have bottom surfaces that are recessed with respect to bottom surfaces of the 1st portion, the 21st portion, and the 22nd portion, respectively, to form oil reservoirs. The oiling nozzle according to any one of claims 1 to 7 ,
The first portion is a portion where the oil supply port is formed on the bottom surface of the guide groove, and the first portion is a portion where the oil supply port is formed on the bottom surface of the guide groove, and at least one portion is formed by an upstream end edge or a downstream end edge of the oil supply port when viewed in the yarn passing direction. Oiling nozzle consisting of parts.

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