Thread cutting and suction device

Abstract

To provide a yarn suction apparatus capable of securely cutting and sucking yarns running arrayed in an arrangement direction.SOLUTION: A yarn cutting suction apparatus 40 is assembled with: a cutter 42 having a blade part 42a for cutting a yarn Y, movable from left to right in the right and left directions, a cylindrical member 51 which is movable integrally with the cutter 42 and sucks a plurality of yarns Y having been cut with the cutter 42; a first leading guide 44 which is provided in the upstream of the cutter 42 in the yarn running direction, moves integrally with the cutter 42, and leads the yarn Y to the blade part 42a; and a second leading guide 45 which is arranged in the downstream of the cutter 42 in the yarn running direction, moves integrally with the cutter 42, and leads the yarn Y to the blade part 42a. The first leading guide 44 includes a first regulation part which regulates movement of the yarn Y in a direction in which the yarn Y is pushed by contact with the blade part 42a; and the second leading guide 45 includes a second regulation part which regulates movement of the yarn Y in a direction in which the yarn Y is pushed by contact with the blade part 42a.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a thread cutting and suction device. [Background technology]

[0002] Patent Document 1 discloses a yarn cutting and suction device that includes a cutter that can move in the arrangement direction of multiple yarns, and a suction device that is provided close to the cutter, can move in the arrangement direction like the cutter, and sucks up the yarns cut by the cutter.

[0003] The yarn cutting and suction device of Patent Document 1 can cut traveling yarns one by one by moving the cutter in the direction in which multiple yarns are arranged. This makes it possible to cut all yarns regardless of the number of yarns. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-180610 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the thread cutting and suction device of Patent Document 1, when an attempt is made to cut a thread by moving the cutter in the direction in which multiple threads are arranged, the thread is pushed out by the cutting edge of the cutter, causing the thread to move away from the blade, and the thread may not be cut reliably.

[0006] An object of the present invention is to provide a yarn cutting and suction device that can more reliably cut and suck yarns that run aligned in the arrangement direction. [Means for solving the problem]

[0007] A yarn cutting and suction device of a first invention is a yarn cutting and suction device that cuts and suctions multiple yarns that are lined up in an arrangement direction and traveling in a yarn traveling direction, and includes: a cutter having a blade portion for cutting the yarns; a suction section that is integral with the cutter and that suctions the multiple yarns cut by the cutter; a first guide that is provided upstream of the cutter in the yarn traveling direction and is integral with the cutter, and that guides the yarn to the blade portion; and a second guide that is provided downstream of the cutter in the yarn traveling direction and is integral with the cutter, and that guides the yarn to the blade portion, wherein when the cutter cuts the yarns, the position of the cutter relative to the multiple yarns is displaced from one side to the other side in the arrangement direction, and the first guide has a first restriction portion that restricts movement of the yarn in a direction in which the yarn is pushed by contact with the blade portion, and the second guide has a second restriction portion that restricts movement of the yarn in a direction in which the yarn is pushed by contact with the blade portion.

[0008] According to the first aspect of the present invention, when the cutter moves relative to the yarn and the blade section comes into contact with the yarn, the movement of the yarn in the direction pushed by the blade section is restricted both upstream and downstream of the cutter in the yarn traveling direction, which prevents the yarn from moving away from the blade section and more reliably cuts and sucks up yarns traveling aligned in the arrangement direction.

[0009] The thread cutting and suction device of the second invention is the same as that of the first invention, characterized in that the first guide groove is formed in the first guide for guiding the thread to the blade portion, the second guide groove is formed in the second guide for guiding the thread to the blade portion, a part of the inner surface of the first guide groove constitutes the first regulating portion, and a part of the inner surface of the second guide groove constitutes the second regulating portion.

[0010] According to the second invention, the first guide groove and the second guide groove can more reliably guide the thread to the blade section, and the thread traveling in a state aligned in the arrangement direction can be more reliably cut and sucked up.

[0011] The yarn cutting and suction device of the third invention is the yarn cutting and suction device of the first or second invention, characterized in that, when viewed from the yarn running direction, the angle of the extending direction of the blade portion at the contact point with the yarn with respect to the direction in which the yarn is guided by the first guide and the second guide is 45 degrees or more and 90 degrees or less.

[0012] According to the third aspect of the present invention, a greater force is transmitted from the blade portion to the yarn when cutting the yarn than when the angle between the extending direction of the blade portion at the point of contact with the yarn and the direction in which the yarn is guided by the first and second guides is less than 45 degrees, thereby more reliably cutting the traveling yarn.

[0013] The yarn cutting and suction device of the fourth invention is the yarn cutting and suction device of the first and second inventions, wherein the blade portions extend along a straight line from one side of the arrangement direction toward the other side so as to be located on one side of an orthogonal direction orthogonal to the yarn running direction and the arrangement direction, and when viewed from the yarn running direction, the angle of the extension direction of the blade portions at the contact points with the yarn on the one side of the orthogonal direction with respect to the direction in which the yarn is guided by the first and second guiding guides is between 10 degrees and 90 degrees as viewed from the yarn running direction.

[0014] According to the fourth aspect of the present invention, the yarn can be more appropriately guided to the blade portion that extends at an angle to the orthogonal direction when viewed from the yarn traveling direction, compared to when the angle of the extending direction of the blade portion at the point of contact with the yarn, on one side of the orthogonal direction to the yarn guiding direction, is greater than 90 degrees or less than 10 degrees. This makes it possible to more reliably cut the traveling yarn.

[0015] The yarn cutting and suction device of the fifth invention is characterized in that, in the third and fourth inventions, the blade portion extends along a straight line so as to be located either upstream or downstream in the yarn traveling direction as it moves from one side to the other side in the arrangement direction.

[0016] According to the fifth aspect of the present invention, the blade portion can be brought into contact with the running yarn with the extending direction of the blade portion inclined with respect to the running direction of the yarn. This allows the blade portion to penetrate the running yarn more easily than when the blade portion is brought into contact with the running yarn with the extending direction of the blade portion perpendicular to the running direction of the yarn, and the yarn can be cut more easily.

[0017] The thread cutting and suction device of the sixth invention is characterized in that, in the first to fifth inventions, the blade portion is formed so that the contact portion with the thread varies from the time of contact with the thread until the thread is cut.

[0018] According to the sixth aspect of the present invention, the yarn moves along the blade portion from the time it comes into contact with the blade portion until it is cut. This distributes the load on the blade portion compared to when the yarn is cut at only one point on the blade portion. This reduces the burden on the blade portion and makes it possible to cut the traveling yarn.

[0019] The yarn cutting and suction device of the seventh invention is the sixth invention, characterized in that the blade portions, when viewed from the arrangement direction, have an inclination angle of the extending direction of the blade portions with respect to the yarn traveling direction of 25 degrees or more and 45 degrees or less.

[0020] According to the seventh aspect of the present invention, from the time the yarn comes into contact with the blade portion until it is cut, the yarn moves along the blade portion such that the inclination angle of the extending direction of the yarn relative to the yarn running direction is between 25 degrees and 45 degrees when viewed from the arrangement direction. This makes it possible to cut the running yarn with less strain on the blade portion.

[0021] The yarn cutting and suction device of an eighth invention is characterized in that, in the first to seventh inventions, the cutter has a single blade structure consisting of one of the blade portions.

[0022] According to the eighth aspect of the present invention, costs can be reduced compared to a multi-blade configuration consisting of two or more blade portions. [Effects of the Invention]

[0023] In the yarn cutting and suction device, yarns traveling in a state aligned in the arrangement direction can be more reliably cut and sucked. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a schematic diagram showing a spinning take-up machine according to an embodiment of the present invention. [Figure 2] 1 is a perspective view showing a thread cutting and suction device according to an embodiment of the present invention; [Figure 3] 1 is a side cross-sectional view showing a thread cutting and suction device according to an embodiment of the present invention. [Figure 4] 4A and 4B are plan views showing the right end portion of the thread cutting and suction device, in which (a) is a plan view of the first guide, and (b) is a plan view of the second guide. [Figure 5] 5 is a cross-sectional view of FIG. 4 taken along line V-V. [Figure 6] FIG. 4 is a side cross-sectional view showing a state before the yarn is cut by the yarn cutting and suction device. [Figure 7] 4 is a side cross-sectional view showing the yarn cutting and suction operation by the yarn cutting and suction device. FIG. [Figure 8] 10 is a diagram showing a state immediately after the yarn cutting and suction operation by the yarn cutting and suction device is completed. FIG. [Figure 9] FIG. 10 is a plan view showing the right end portion of a thread cutting and suction device according to a modified example. [Figure 10] FIG. 10 is a plan view showing a right end portion of a thread cutting and suction device according to another modified example. [Figure 11] 11 is a cross-sectional view taken along the line XI-XI in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0025] (Overall configuration of spinning take-up machine 1) A preferred embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a diagram showing the schematic configuration of a yarn take-up machine 1. As shown in Fig. 1, the yarn take-up machine 1 includes a spinning device 2, an oil supply guide 3, two godet rollers 4a and 4b, and a yarn winding device 5. Hereinafter, the up-down direction on the paper surface of Fig. 1 will be referred to as the up-down direction, and the left-right direction on the paper surface will be referred to as the front-rear direction. Furthermore, the direction perpendicular to the paper surface of Fig. 1 will be referred to as the left-right direction, and the front side of the paper surface will be referred to as the right side. Below, the above directional terms will be used appropriately in the description.

[0026] The spinning yarn take-up machine 1 is configured such that an oil is applied to a plurality of yarns Y continuously spun from a spinneret 2a of a spinning device 2 using an oil supply guide 3, and then these yarns Y are stretched by two godet rollers 4a and 4b, and then transported to a yarn winding device 5 below for winding.

[0027] From the spinneret 2a of the spinning device 2, a plurality of threads Y each consisting of a plurality of filaments F of a molten fiber material such as polyester is continuously spun downward. The oil supply guide 3 is disposed below the spinning device 2 and applies an oil agent to the plurality of threads Y spun from the spinning device 2. The oil supply guide 3 also regulates the spacing of the plurality of threads Y in the left-right direction (the arrangement direction of the present invention) at a constant level.

[0028] Further, below the oil supply guide 3 and above the godet roller 4a, a yarn control guide 30 is provided. As shown in FIG. 2, the yarn control guide 30 has a plurality of guide pieces 30a arranged in the arrangement direction of the plurality of yarns Y, and is comb-shaped. The plurality of guide pieces 30a extend from the front side to the rear side. The plurality of yarns Y fed from the spinning device 2 are passed through the spaces between the plurality of guide pieces 30a. This regulates a constant interval in the left-right direction, which is the arrangement direction of the plurality of yarns Y.

[0029] The yarn Y to which the oil has been applied is taken up by two godet rollers 4a, 4b and sent to a yarn winding device 5 disposed below. The godet roller 4b is disposed downstream of the godet roller 4a in the yarn running direction of the yarn Y and above and behind the godet roller 4a. The two godet rollers 4a, 4b are driven by a drive motor (not shown).

[0030] The yarn winding device 5 is a device for winding multiple yarns Y, and includes multiple fulcrum guides 11 to which the multiple yarns Y sent from the godet roller 4b are respectively distributed, multiple traverse guides 12 that respectively traverse the yarns Y distributed by the multiple fulcrum guides 11, two bobbin holders 13 to which multiple bobbins B are attached in series along their axes, a disk-shaped turret 14 that supports one end of the bobbin holder 13, a main body frame 15 that rotatably supports the turret 14, and a contact roller 16 that is movable in the vertical direction relative to the main body frame 15 and moves in contact with and away from the bobbin B attached to the bobbin holder 13.

[0031] (Configuration of thread cutting and suction device 40) Next, the yarn cut suction device 40 will be described below. As shown in Figures 1 and 2, the yarn cut suction device 40 is disposed below the oil supply guide 3, immediately upstream of the yarn regulating guide 30 in the yarn running direction, and to the left of the yarn path for the multiple yarns Y that are aligned in the left-right direction and run from upstream to downstream in the yarn running direction. As shown in Figure 3, the yarn cut suction device 40 has a holder 41 as its base, a cutter 42, a suction device 43, a first guide 44, and a second guide 45.

[0032] As shown in FIG. 7, for example, the suction device 43 is configured to suck the plurality of yarns Y cut by the cutter 42. As shown in FIG. 3, the suction device 43 includes a tubular member 51 (corresponding to a suction unit of the present invention) and an air cylinder (not shown). The right end of the tubular member 51 protrudes from an opening 41a of the holder 41. The tubular member 51 is connected to a suction source 71 shown in FIG. 1, and a suction force that sucks the plurality of cut yarns Y is generated at the right end of the tubular member 51. The cut yarns Y are sucked from the suction port 51a at the right end of the tubular member 51. The tubular member 51 is connected to the suction source 71 via an electromagnetic valve (not shown). The air cylinder (not shown) is provided in the holder 41. A cylinder rod (not shown) is attached to the air cylinder. The cylinder rod is connected to the tubular member 51. 1 drives the air cylinder to move the cylinder rod back and forth, thereby moving the tubular member 51 back and forth in the arrangement direction (left and right direction) of the multiple yarns Y. In this embodiment, the left side in the left and right direction corresponds to one side of the arrangement direction in the present invention, and the right side in the left and right direction corresponds to the other side of the arrangement direction in the present invention.

[0033] 7, for example, the cutter 42 is for cutting the multiple yarns Y one by one or multiple yarns at a time above the yarn regulation guide 30 when the tubular member 51 moves to the right. As shown in FIGS. 2 and 3, the cutter 42 is attached to the lower part of the right-side tip of the tubular member 51 via a cutter holder 48. As a result, when the tubular member 51 moves to the right, the cutter 42 moves to the right side where the multiple yarns Y are arranged.

[0034] The cutter 42 is plate-shaped and has one blade portion 42a for cutting the yarn Y. That is, the cutter 42 has a single blade. The blade portion 42a extends along a straight line at an end edge of the cutter 42. As shown in FIG. 3, the blade portion 42a extends along a straight line so as to be positioned higher from left to right in the left-right direction. When viewed from the front-to-rear direction, the inclination angle θ1 of the extending direction of the blade portion 42a with respect to the up-to-down direction may be, for example, within a range of 25 degrees to 45 degrees. In this embodiment, the up-to-down direction roughly coincides with the yarn traveling direction near the yarn cutting and suction device 40. Furthermore, as shown in FIG. 5, the blade portion 42a extends along a straight line so as to be positioned higher from front to rear in the front-to-rear direction. Specifically, when viewed from the left-right direction (arrangement direction), the blade portion 42a extends along a straight line, and the inclination angle θ3 of the extension direction of the blade portion 42a with respect to the up-down direction is within a range of 25 degrees to 45 degrees (see FIG. 5). Furthermore, because the blade portion 42a has the predetermined inclination angles θ1 and θ3, the blade portion 42a extends along a straight line so that it is positioned further rearward from left to right when viewed from the up-down direction (see FIG. 4).

[0035] The first guide guide 44 and the second guide guide 45 are members for guiding the yarn Y to the blade portion 42a of the cutter 42. The first guide guide 44 is provided upstream of the cutter 42 in the yarn traveling direction and is attached to a lower part of the right end of the tubular member 51 via a cutter holding portion 48. The second guide guide 45 is provided downstream of the cutter 42 in the yarn traveling direction and is attached to a lower part of the right end of the tubular member 51 via a cutter holding portion 48. As a result, when the tubular member 51 moves to the right, the first guide guide 44 and the second guide guide 45 move together to the right side where the multiple yarns Y are arranged. In other words, the cutter 42, the suction device 43, the first guide guide 44, and the second guide guide 45 can move horizontally together as the tubular member 51 moves horizontally.

[0036] As shown in Fig. 2, the first guide guide 44 has an opening on the right side when viewed from the top-bottom direction, and a first guide groove 46 extending straight from the opening while tilting leftward and rearward. The second guide guide 45 has an opening on the right side when viewed from the top-bottom direction, and a second guide groove 47 extending straight from the opening while tilting leftward and rearward. When the tubular member 51 moves from left to right in the left-right direction, the multiple yarns Y arranged in the left-right direction are guided one by one to the blade portion 42a by the first guide groove 46 and the second guide groove 47. That is, in this embodiment, the extending direction of the first guide groove 46 and the second guide groove 47 is the direction in which the yarn Y is guided by the first guide groove 46 and the second guide groove 47.

[0037] As described above, the blade portion 42a extends along a straight line from the left (one side) to the right (other side) in the left-right direction (arrangement direction) so as to be located at the rear side (one side of the orthogonal direction) in the front-rear direction (corresponding to the orthogonal direction in the present invention). As shown in FIG. 4 , when viewed from the top-bottom direction (yarn running direction), the angle θ2 of the straight extension direction of the blade portion 42a with respect to the extension direction of the first guide groove 46 and the second guide groove 47 on the rear side in the front-rear direction (corresponding to one side of the orthogonal direction in the present invention) is between 45 degrees and 90 degrees. This allows a greater force to be transmitted from the blade portion 42a to the yarn Y when cutting the yarn Y, thereby more reliably cutting the traveling yarn Y. Furthermore, the yarn Y can be more appropriately guided to the blade portion 42a, which extends at an angle relative to the front-rear direction in the top-bottom direction.

[0038] Here, the yarn Y guided by the blade portion 42a contacts the blade portion 42a, which extends along a straight line so as to be positioned rearward as it moves from left to right when viewed from the top-bottom direction, and is thereby pushed toward the right and forward of the blade portion 42a. In this case, the movement of the yarn Y in the direction in which it is pushed by contact with the blade portion 42a is restricted by a portion of the inner surface of the first guide groove 46 that is on the front side in the front-to-back direction and to the right of the blade portion 42a near the blade portion 42a (the shaded portion in FIG. 4(a)) (see FIGS. 4(a) and 5). Furthermore, the movement of the yarn Y in the direction in which it is pushed by contact with the blade portion 42a is restricted by a portion of the inner surface of the second guide groove 47 that is on the rear side in the front-to-back direction and to the right of the blade portion 42a near the blade portion 42a (the shaded portion in FIG. 4(b)) (see FIGS. 4(b) and 5). That is, a portion of the inner surface of the first guide groove 46 (the shaded portion in Figure 4(a)) corresponds to the first regulating portion of the present invention, and a portion of the inner surface of the second guide groove 47 (the shaded portion in Figure 4(b)) corresponds to the second regulating portion of the present invention.

[0039] (Cutting and Suction Operation of Yarn Y by Yarn Cutting and Suction Device 40) The cutting operation of the yarn Y by the yarn cutting and suction device 40 will be described below with reference to Figures 4 to 8. In Figures 4 and 5, the yarn Y that is not guided by the first guide groove 46 and the second guide groove 47 is defined as Ya, and the yarn Y that is guided by the first guide groove 46 and the second guide groove 47 is defined as Yb. While the yarn Y is being wound by the yarn winding device 5, the suction device 43 is not driven because its connection with the suction source 71 is interrupted by an electromagnetic valve (not shown). The tubular member 51 is positioned retracted toward the holder 41, and the right end of the tubular member 51, the cutter 42, the first guide guide 44, and the second guide guide 45 are also retracted toward the holder 41 from the multiple traveling yarns Y.

[0040] As shown in Fig. 6, when a sensor (not shown) detects an abnormality such as a yarn breakage during winding, the yarn cut suction device 40 is activated automatically or manually by an operator. The yarn cut suction device 40 starts suction when an electromagnetic valve (not shown) is opened and the tubular member 51 is connected to the suction source 71. The arrow in the tubular member 51 in Fig. 6 indicates the suction direction.

[0041] Next, as shown in FIG. 7, the air cylinder is driven by the drive unit 70, causing the cylinder rod of the air cylinder to extend, and the tubular member 51 connected thereto to protrude to the right. As the tubular member 51 moves to the right, the cutter 42, first guide 44, and second guide 45 attached to the tubular member 51 move to the right, where the multiple yarns Ya are arranged. As a result, the leftmost yarn Ya of the multiple yarns Ya arranged in the left-right direction is guided into the first guide groove 46 and the second guide groove 47 from the right openings of the first guide groove 46 and the second guide groove 47, as shown in FIG. 4. As the tubular member 51 moves, the yarn Yb guided into the first guide groove 46 and the second guide groove 47 moves rearward and leftward along the first guide groove 46 and the second guide groove 47 (see the solid arrows in FIG. 4).

[0042] The yarn path of the yarn Ya when not guided by the first guide groove 46 and the second guide groove 47 is defined by the oil supply guide 3 and the yarn control guide 30. In contrast, the first guide groove 46 and the second guide groove 47 extend at an angle to the left and rear when viewed in the up-down direction. Therefore, the yarn path of the yarn Yb guided by the first guide groove 46 and the second guide groove 47 is located rearward in the front-to-rear direction from the yarn path of the yarn Ya, as shown in Fig. 4. More specifically, the yarn path of the yarn Yb is defined by the oil supply guide 3 and the front inner surface of the first guide groove 46 upstream of the first guide guide 44 in the yarn running direction; between the first guide guide 44 and the second guide guide 45, it is defined by the front inner surface of the first guide groove 46 and the front inner surface of the second guide groove 47; and downstream of the second guide guide 45 in the yarn running direction, it is defined by the front inner surface of the second guide groove 47 and the yarn control guide 30.

[0043] When the tubular member 51 is moved further to the right while the yarn Yb is guided into the first guide groove 46 and the second guide groove 47, the yarn Yb comes into contact with the blade portion 42a. Then, in order to cut the yarn Yb with the blade portion 42a, the tubular member 51 is moved further to the right while the yarn Yb and the blade portion 42a are in contact with each other. At this time, the yarn Yb tries to be pushed forward and to the right of the blade portion 42a due to its contact with the blade portion 42a, but the movement of the yarn Yb forward and to the right of the blade portion 42a is restricted by both a portion of the inner surface of the first guide groove 46 (the hatched portion in FIG. 4(a)) and a portion of the inner surface of the second guide groove 47 (the hatched portion in FIG. 4(b)).

[0044] The restriction of the movement of the yarn Yb by a part of the inner surface of the first guide groove 46 (see the hatched portion in FIG. 4(a)) and a part of the inner surface of the second guide groove 47 (see the hatched portion in FIG. 4(b)) will be described in detail below. When the yarn Yb contacts the blade portion 42a, as shown in FIG. 5, the upstream side of the contact point between the yarn Yb and the blade portion 42a in the yarn running direction contacts the front inner surface of the first guide groove 46, and the downstream side of the contact point between the yarn Yb and the blade portion 42a in the yarn running direction contacts the rear inner surface of the second guide groove 47. When the tubular member 51 is moved to the right in this state, the yarn path of the yarn Yb between the blade portion 42a and the oil supply guide 3, which is arranged upstream of the blade portion 42a in the yarn running direction, and the yarn path between the blade portion 42a and the yarn regulation guide 30, which is arranged downstream of the blade portion 42a in the yarn running direction, tend to move forward and rightward. However, the yarn Yb traveling upstream of the blade portion 42a in the yarn traveling direction is caught on a portion of the inner surface of the first guide groove 46 that is on the front side and to the right of the blade portion 42a near the blade portion 42a (the shaded portion in FIG. 4(a)). As a result, the only yarn path that the yarn Yb moves to the front and right of, traveling upstream of the blade portion 42a in the yarn traveling direction, is the yarn path between the blade portion 42a and the first guide groove 46, and movement of the yarn path between the first guide groove 46 and the oil supply guide 3 is restricted. Furthermore, the yarn Yb traveling downstream of the blade portion 42a in the yarn traveling direction is caught on a portion of the inner surface of the second guide groove 47 that is on the rear side and to the right of the blade portion 42a near the blade portion 42a (the shaded portion in FIG. 4(b)). As a result, the only yarn path where the yarn Yb moves forward and to the right among the yarn paths that run downstream of the blade portion 42a in the yarn running direction is the one between the blade portion 42a and the second guide groove 47, and movement of the yarn path between the second guide groove 47 and the yarn regulation guide 30 is restricted. As a result, movement of the yarn Yb, which has come into contact with the blade portion 42a, forward and to the right, in the direction in which it is pushed by the blade portion 42a, is restricted both upstream and downstream of the cutter 42 in the yarn running direction.

[0045] As described above, the blade portion 42a is formed to be positioned higher as it moves from the front to the rear in the front-to-rear direction, and the inclination angle θ3 with respect to the up-down direction when viewed from the left-to-right direction is within a range of 25 degrees to 45 degrees (see FIG. 5). As a result, from the time the blade portion 42a comes into contact with the yarn Yb until the yarn Yb is cut, the contact portion between the blade portion 42a and the yarn Yb moves from the upper and rear side to the lower and front side along the inclination of the blade portion 42a when viewed from the left-to-right direction.

[0046] 7, as the tubular member 51 moves to the right, the multiple threads Y arranged in the left-right direction are guided to the blade portion 42a by the first guide 44 and the second guide 45, and are cut one by one in the above-described procedure. The cut threads Y are then sucked by the suction device 43.

[0047] 8, when the tubular member 51 is moved to a predetermined position to the right of the multiple yarns Y in the left-right direction, all of the arranged multiple yarns Y are cut and sucked in. Thereafter, the driving of the air cylinder by the driving device 70 is stopped, and with the movement of the tubular member 51 stopped, the operator brings the suction gun S closer. After the multiple yarns Y are cut by a cutter (not shown) at the tip of the suction gun S, the multiple yarns Y are sucked and held by the suction gun S. The driving device 70 drives the air cylinder to retract the tubular member 51 to the left. Then, the suction gun S threads the yarns again onto the yarn regulation guide 30.

[0048] (effect) The yarn cutting and suction device 40 of this embodiment is a yarn cutting and suction device that cuts and suctions multiple yarns Y that are lined up in the left-right direction (arrangement direction) and traveling in the yarn traveling direction, and is equipped with a cutter 42 that has a blade portion 42a for cutting the yarn Y and is movable from left to right in the left-right direction, a tubular member 51 (suction portion) that is movable integrally with the cutter 42 and sucks up the multiple yarns Y cut by the cutter 42, a first guide 44 that is provided upstream of the cutter 42 in the yarn traveling direction, moves integrally with the cutter 42, and guides the yarn Y to the blade portion 42a, and a second guide 45 that is provided downstream of the cutter 42 in the yarn traveling direction, moves integrally with the cutter 42, and guides the yarn Y to the blade portion 42a. The first guide 44 has a first restricting portion that restricts movement of the yarn Y in the direction in which the yarn Y is pushed by contact with the blade portion 42a, and the second guide 45 has a second restricting portion that restricts movement of the yarn Y in the direction in which the yarn Y is pushed by contact with the blade portion 42a. According to this embodiment, when the cutter 42 moves to the right and the yarn Y comes into contact with the blade portion 42a, movement of the yarn Y in the direction in which it is pushed by the blade portion 42a is restricted both upstream and downstream of the cutter 42 in the yarn traveling direction. This prevents the yarn Y from moving away from the blade portion 42a, and allows the yarns traveling side by side in the left-right direction to be more reliably cut and sucked up.

[0049] In the yarn cutting and suction device 40 of this embodiment, the first guide guide 44 is formed with a first guide groove 46 for guiding the yarn Y to the blade portion 42a, and the second guide guide 45 is formed with a second guide groove 47 for guiding the yarn Y to the blade portion 42a. A part of the inner surface of the first guide groove 46 constitutes the first restricting portion, and a part of the inner surface of the second guide groove 47 constitutes the second restricting portion. According to this embodiment, the first guide groove 46 and the second guide groove 47 can more reliably guide the yarn Y to the blade portion 42a, and can more reliably cut and suction the yarns Y traveling side by side in the left-right direction.

[0050] In the yarn cutting and suction device 40 of this embodiment, when viewed from the top-bottom direction (yarn traveling direction), the angle θ2 of the extending direction of the blade portion 42a at the contact point with the yarn Y relative to the direction in which the yarn Y is guided by the first guide groove 46 of the first guide member 44 and the second guide groove 47 of the second guide member 45 is 45 degrees or more and 90 degrees or less. According to this embodiment, when viewed from the yarn traveling direction, the yarn Y can be pressed against the blade portion 42a at an angle of 45 degrees or more and 90 degrees or less relative to the extending direction of the blade portion 42a, so that a greater force is transmitted from the blade portion 42a to the yarn Y when cutting the yarn Y. This makes it possible to more reliably cut the traveling yarn Y.

[0051] In the yarn cutting and suction device 40 of this embodiment, the blade portion 42a extends along a straight line from left to right in the left-right direction so as to be located on the rear side in the front-to-rear direction (one side in the perpendicular direction), and when viewed from the top-to-bottom direction (yarn running direction), the angle θ2 of the extending direction of the blade portion 42a at the contact point with the yarn Y, relative to the direction in which the yarn Y is guided by the first guide groove 46 and the second guide groove 47, on the rear side in the front-to-rear direction, is 10 degrees or more and 90 degrees or less. According to this embodiment, the yarn Y can be more appropriately guided to the blade portion 42a, which extends at an angle with respect to the front-to-rear direction when viewed from the top-to-bottom direction, compared to when the angle of the extending direction of the blade portion 42a at the contact point with the yarn Y, relative to the direction in which the yarn Y is guided, on the rear side in the front-to-rear direction, when viewed from the top-to-bottom direction, is greater than 90 degrees or less than 10 degrees. This allows the traveling yarn Y to be cut more reliably.

[0052] In the yarn cutting and suction device 40 of this embodiment, the blade portion 42a extends along a straight line so as to be located upstream in the yarn traveling direction as it moves from left to right in the left-right direction. This allows the blade portion 42a to come into contact with the traveling yarn Y with the extending direction of the blade portion 42a inclined with respect to the yarn traveling direction. Therefore, compared to when the blade portion 42a comes into contact with the traveling yarn Y with the extending direction of the blade portion 42a perpendicular to the yarn traveling direction, the blade portion 42a can penetrate the traveling yarn Y more easily, and the yarn Y can be cut more easily.

[0053] In the yarn cutting and suction device 40 of this embodiment, the blade portion 42a is formed so that the contact portion with the yarn Y varies from the time of contact with the yarn Y until the yarn Y is cut. When the blade portion 42a is pressed against the yarn Y, which is restricted by a portion of the inner surface of the first guide groove 46 (first restriction portion) and a portion of the inner surface of the second guide groove 47 (second restriction portion), by more than a certain amount, the yarn Y is cut. The amount of pressure of the blade portion 42a required to cut the yarn Y depends on the strength of the yarn Y, etc. According to this embodiment, the yarn Y moves along the blade portion 42a from the time of contact with the blade portion 42a until the amount of pressure of the blade portion 42a required to cut the yarn Y is reached and the yarn Y is cut. Therefore, the load on the blade portion 42a is distributed compared to when the yarn Y is cut at only one location on the blade portion 42a. This reduces the burden on the blade portion 42a and allows the traveling yarn Y to be cut.

[0054] Furthermore, in the yarn cutting and suction device 40 of this embodiment, the blade portion 42a has an inclination angle θ3 of 25 degrees or more and 45 degrees or less of the extending direction of the blade portion 42a with respect to the yarn traveling direction (up-down direction) when viewed from the left-right direction. Accordingly, from the time the yarn Y comes into contact with the blade portion 42a until the yarn Y is cut, the yarn Y moves along the blade portion 42a, whose extending direction has an inclination angle θ3 of 25 degrees or more and 45 degrees or less with respect to the yarn traveling direction when viewed from the left-right direction. This reduces the burden on the blade portion 42a, and enables the traveling yarn Y to be cut.

[0055] In the thread cutting and suction device 40 of this embodiment, the cutter 42 has a single blade configuration consisting of one blade portion 42a, which allows for cost reduction compared to a multiple blade configuration consisting of two or more blade portions.

[0056] (Variation) The following describes modifications of the above embodiment, but the same reference numerals are used to designate components having the same configuration as the above embodiment, and the description thereof will be omitted as appropriate.

[0057] In the above embodiment, the yarn cutting and suction device 40 is disposed immediately upstream of the yarn regulation guide 30 in the yarn traveling direction, to the left of the yarn path of the multiple yarns Y that are aligned in the left-right direction and travel from upstream to downstream in the yarn traveling direction. However, the yarn cutting and suction device 40 may also be disposed to the right of the yarn path of the multiple yarns Y. In this case, the cutter 42 and the suction device 43 of the yarn cutting and suction device 40 move from right to left in the left-right direction to cut and suck the multiple yarns Y.

[0058] In the above embodiment, the cutter 42, the suction device 43, the first guide guide 44, and the second guide guide 45 are movable in the left-right direction together with the movement of the tubular member 51 in the left-right direction. However, the cutter 42, the suction device 43, the first guide guide 44, the second guide guide 45, and the tubular member 51 may be fixed and not movable in the left-right direction. In this case, for example, the yarn restriction guide 30, which regulates the horizontal spacing of the multiple yarns Y at a constant level, is configured to be movable in the left-right direction. When the yarn cutting and suction device 40 cuts the yarns Y, the yarn restriction guide 30 moves integrally with the multiple yarns Y toward the left-right side where the cutters 42 and the like are located, and the yarns Y are guided to the blade portion 42a by the first guide guide 44 and the second guide guide 45. Alternatively, a yarn pulling guide may be separately provided to pull the multiple yarns Y, the horizontal spacing of which is regulated by the yarn restriction guide 30, toward the left-right side where the cutters 42 and the like are located. Additionally, the cutter 42, the suction device 43, the first guide guide 44, and the second guide guide 45 may move in the left-right direction of the tubular member 51 to approach the multiple yarns Y, and the yarn restriction guide 30 and the yarn pulling guide may move in the left-right direction to bring the multiple yarns Y closer to the cutter 24, etc. In any case, when the cutter 42 cuts the yarn Y, the relative positions of the cutter 42 and the suction device 43, the first guide guide 44, and the second guide 45, which are integrated with the cutter 42, with respect to the multiple yarns Y are displaced from left to right in the left-right direction, which is the arrangement direction.

[0059] In the above embodiment, as shown in FIG. 4 , the blade portion 42a extends along a straight line so that it is positioned rearward from left to right when viewed from the top-bottom direction. However, as shown in FIG. 9 , the blade portion 142a may extend along a straight line so that it is positioned forward from left to right when viewed from the top-bottom direction. In this case, the front side in the front-to-back direction corresponds to one side of the orthogonal direction in the present invention. As shown in FIG. 9 , in this modification, the angle θ4 between the extension direction of the blade portion 142a and the yarn Y at the contact point with the yarn Y when viewed from the top-bottom direction, on the front side in the front-to-back direction, relative to the direction in which the yarn Y is guided, is between 10 degrees and 90 degrees. This allows the yarn Y to be more appropriately guided to the blade portion 42a, which extends at an angle relative to the front-to-back direction when viewed from the top-to-bottom direction, compared to when the angle between the extension direction of the blade portion 42a and the yarn Y at the contact point with the yarn Y when viewed from the top-to-bottom direction, on the rear side in the front-to-back direction, relative to the direction in which the yarn Y is guided, is greater than 90 degrees or less than 10 degrees. This allows the yarn Y to be cut more reliably as it travels. In the configuration of the modified example shown in FIG. 9, when viewed from the top-bottom direction (yarn running direction), the angle θ4 of the straight extension direction of the blade portion 142a with respect to the extension direction of the first guide groove 46 and the second guide groove 47 (i.e., the direction in which the yarn Y is guided) is smaller than 45 degrees. As in the above embodiment, the blade portion may extend along a straight line so as to be positioned rearward from left to right in the left-right direction when viewed from the top-bottom direction. In this case, the angle of the extension direction at the contact point between the blade portion and the yarn Y when viewed from the top-bottom direction, relative to the guide direction of the yarn Y, on the rear side in the front-to-back direction, is preferably 10 degrees or more and 90 degrees or less. Furthermore, in this case, when viewed from the top-bottom direction (yarn running direction), the angle of the extension direction of the blade portion at the contact point with the yarn Y with respect to the guide direction of the yarn Y is preferably 45 degrees or more and 90 degrees or less, as in the above embodiment, but may be smaller than 45 degrees.

[0060] In the above embodiment, the first guide guide 44 is formed with a first guide groove 46 for guiding the yarn Y to the blade portion 42a, and the second guide guide 45 is formed with a second guide groove 47 for guiding the yarn Y to the blade portion 42a. A portion of the inner surface of the first guide groove 46 serves as the first restricting portion, and a portion of the inner surface of the second guide groove 47 serves as the second restricting portion. However, the first guide guide 44 may not be formed with the first guide groove 46, and the second guide guide 45 may not be formed with the second guide groove 47. In this case, for example, as shown in FIG. 10 , the yarn Y may be configured to be guided to the blade portion 42a along the rear side surface of the first guide guide 144 and the front side surface of the second guide guide 145. FIG. 10 is a plan view of the right end portion of a yarn cutting and suction device according to a modified example, as seen from above. The first guide guide 144 is located on the near side of the paper, and the second guide guide 145 is located on the far side of the paper, with the cutter 42 sandwiched therebetween. As shown in FIG. 10 , the first guide 144 and the second guide 145 do not overlap in a plan view when viewed from above. The yarn Y passes through a gap between the rear side surface of the first guide 144 and the front side surface of the second guide 145 in a plan view when viewed from above, and is guided to the blade portion 42a. In this case, when the yarn Yb contacts the blade portion 42a, as shown in FIGS. 10 and 11 , the yarn Yb contacts a portion of the rear side surface of the first guide 144 (the hatched portion of the first guide 144 in FIG. 10 ) and a portion of the front side surface of the second guide 145 in the front-to-rear direction (the hatched portion of the second guide 145 in FIG. 10 ). This restricts movement of the yarn Y in the direction in which it is pushed by contact with the blade portion 42a. That is, in this case, a portion of the rear side surface of the first guide 144 in the front-to-rear direction corresponds to the first restricting portion, and a portion of the front side surface of the second guide 145 in the front-to-rear direction corresponds to the second restricting portion. Alternatively, a guide groove may be formed in only one of the first guide guide 44 and the second guide guide 45. In this case, movement of the yarn Y in the direction in which the yarn Y is pushed by contact with the blade portion 42a is restricted by a part of the inner surface of the guide groove formed in one of the first guide guide 44 and the second guide guide 45 and a part of the side surface of the other of the first guide guide 44 and the second guide guide 45.

[0061] In the present invention, the restriction of the movement of the thread Y in the direction in which the thread Y is pushed by contact with the blade portion 42a by the first and second regulating portions includes both fixing the movement of the thread Y in the direction in which the thread Y is pushed and suppressing the movement of the thread Y.

[0062] In the above embodiment, when viewed from the top-bottom direction (yarn running direction), the angle θ2 between the extending direction of the straight line of the blade portion 42a and the direction in which the yarn Y is guided by the first guide groove 46 and the second guide groove 47 is 45 degrees or more and 90 degrees or less. However, the angle θ2 may be any value less than 45 degrees.

[0063] In the above embodiment, the first guide groove 46 and the second guide groove 47 extend straight. However, the first guide groove 46 and the second guide groove 47 may be curved or bent. In this case, when viewed from the top-bottom direction, the angle between the linear extension direction of the blade portion 42a at the contact point with the yarn Y and the direction in which the yarn Y is guided by the first guide groove 46 and the second guide groove 47 near the blade portion 42a is preferably 45 degrees or more and 90 degrees or less. Furthermore, the first guide groove 46 and the second guide groove 47 do not have to be formed in the first guide guide 44 and the second guide guide 45. In this case, when viewed from the top-bottom direction, the angle between the linear extension direction of the blade portion 42a and the direction in which the yarn Y is guided by the side surfaces of the first guide guide 44 and the second guide guide 45 is preferably 45 degrees or more and 90 degrees or less. Furthermore, when viewed from the top-bottom direction, the blade portion 42a does not have to extend along a straight line, but may extend, for example, along a curve. In this case, when viewed from the top-bottom direction, it is preferable that the angle between the extending direction of the tangent at the contact point between the blade portion 42a and the yarn Y and the direction in which the yarn Y is guided by the first guide groove 46 and the second guide groove 47 is 45 degrees or more and 90 degrees or less. In any case, when viewed from the top-bottom direction, it is preferable that the angle between the extending direction of the blade portion 42a at the contact point with the yarn Y and the direction in which the yarn Y is guided by the first guide 44 and the second guide 45 is 45 degrees or more and 90 degrees or less.

[0064] In the above embodiment, the cutter 42 has a single blade configuration consisting of one blade portion 42a, but may have a multiple blade configuration consisting of two or more blade portions.

[0065] In the above embodiment, the first guide groove 46 and the second guide groove 47 extend straight from the right opening, tilting leftward and rearward, when viewed from the top-bottom direction. However, the first guide groove 46 and the second guide groove 47 may extend straight from the right opening, tilting leftward and frontward, or may extend along any curve from the right opening to the left, or may have any other shape. In any case, the angle between the extension direction of the blade portion 42a at the contact point with the yarn Y and the direction in which the yarn Y is guided by the first guide groove 46 and the second guide groove 47 is preferably 45 degrees or more and 90 degrees or less.

[0066] In the above embodiment, the blade portion 42a extends along a straight line at the end edge of the cutter 42. However, when viewed from the front-rear direction, the blade portion 42a may have a curved shape extending along a curved line, for example. In this case, when viewed from the front-rear direction (the orthogonal direction of the present invention), the inclination angle of the tangent line at the point where the blade portion 42a contacts the yarn traveling direction with respect to the yarn traveling direction is preferably 25 degrees or more and 45 degrees or less. When viewed from the left-right direction (the arrangement direction of the present invention), the inclination angle of the tangent line at the point where the blade portion 42a contacts the yarn traveling direction with respect to the yarn traveling direction is preferably 25 degrees or more and 45 degrees or less. Furthermore, when viewed from the yarn traveling direction, the inclination angle of the tangent line at the point where the blade portion 42a contacts the yarn Y with respect to the direction in which the yarn Y is guided by the first guide 44 and the second guide 45 is preferably 45 degrees or more and 90 degrees or less. In addition, when the blade portion 42a has a curved shape when viewed from the front-rear direction, the tangent direction at the contact point between the blade portion 42a and the yarn traveling direction when viewed from the front-rear direction corresponds to the extending direction of the blade portion 42a when viewed from the front-rear direction in the present invention. Also, the tangent direction at the contact point between the blade portion 42a and the yarn traveling direction when viewed from the left-right direction corresponds to the extending direction of the blade portion 42a when viewed from the left-right direction in the present invention. And, the tangent direction at the contact point between the blade portion 42a and the yarn Y when viewed from the yarn traveling direction corresponds to the extending direction at the contact point between the blade portion 42a and the yarn Y when viewed from the yarn traveling direction in the present invention.

[0067] In the above embodiment, the inclination angle θ3 of the blade portion 42a relative to the up-down direction when viewed from the left-right direction is within a range of 25 degrees to 45 degrees. However, the inclination angle θ3 may be less than 25 degrees or greater than 45 degrees. In this case, it is preferable that the blade portion 42a is formed so that the contact portion with the yarn Y changes from the time the blade portion 42a comes into contact with the yarn Y until the yarn Y is cut.

[0068] In the above embodiment, the blade portion 42a is formed to be positioned higher from left to right in the left-right direction (arrangement direction). However, the blade portion 42a may be formed to be positioned lower from left to right in the left-right direction.

[0069] In the above embodiment, a spinning and drawing device may be provided for heating and drawing the yarn Y. In this case, the spinning and drawing device is disposed between the yarn cutting and suction device 40 and the godet roller 4a.

[0070] In the above embodiment, the guide pieces 30a of the yarn regulation guide 30 extend from the front to the rear in the front-to-rear direction. However, the guide pieces 30a may extend from the rear to the front in the front-to-rear direction. [Explanation of symbols]

[0071] 1. Spinning take-up machine 30 Thread control guide 40 Thread cutting and suction device 41 Holder 42 cutter 42a Blade 43 Suction device 44 First Guide 45 Second Guide 46 First guide groove 47 Second guide groove 51 Cylindrical member (suction part of the present invention) 51a Suction port 144 First Guide 145 Second Guide Y thread θ2 angle θ3 tilt angle

Claims

1. A yarn cutting and suction device that cuts and suctions a plurality of yarns that are aligned in an arrangement direction and traveling in a yarn traveling direction, a cutter having a blade portion for cutting the thread; a suction unit that is integral with the cutter and that sucks the plurality of yarns cut by the cutter; a first guide provided upstream of the cutter in the yarn traveling direction and integral with the cutter, the first guide guiding the yarn to the blade portion; a second guide disposed downstream of the cutter in the yarn traveling direction, integral with the cutter, and configured to guide the yarn to the blade portion; When the cutter cuts the yarn, the relative position of the cutter with respect to the plurality of yarns is displaced from one side to the other side in the arrangement direction, the first guide includes a first restricting portion that restricts movement of the yarn in a direction in which the yarn is pushed by contact with the blade portion, The yarn cutting and suction device is characterized in that the second guide has a second restricting portion that restricts movement of the yarn in a direction in which the yarn is pushed by contact with the blade portion.

2. The first guide has a first guide groove formed therein for guiding the thread to the blade portion, The second guide has a second guide groove formed therein for guiding the thread to the blade portion, The yarn cut suction device according to claim 1, wherein a part of an inner surface of the first guide groove constitutes the first restricting portion, and a part of an inner surface of the second guide groove constitutes the second restricting portion.

3. The first regulating portion and the second regulating portion both extend in a common direction, a direction that intersects with the arrangement direction when viewed from the yarn running direction, and a direction in which the yarn is guided by the first guiding guide and the second guiding guide, 3. The yarn cutting and suction device according to claim 1, wherein, when viewed from the yarn traveling direction, an acute angle or a right angle between an extension direction of the blade portion at a contact point with the yarn and the extension direction of the first regulating portion and the second regulating portion is between 45 degrees and 90 degrees.

4. The first regulating portion and the second regulating portion both extend in a common direction, a direction intersecting the arrangement direction when viewed from the yarn running direction, and a direction in which the yarn is guided by the first guide and the second guide; the blade portion extends along a straight line from one side in the arrangement direction to the other side so as to be located on one side of an orthogonal direction orthogonal to the yarn running direction and the arrangement direction, 3. The yarn cutting and suction device according to claim 1, wherein, when viewed from the yarn traveling direction, an angle of an extension direction of the blade portion at a contact point with the yarn with respect to an extension direction of the first regulating portion and the second regulating portion on the one side of the orthogonal direction is 10 degrees or more and 90 degrees or less.

5. 5. The yarn cutting and suction device according to claim 3, wherein the blade portion extends along a straight line so as to be located either upstream or downstream in the yarn traveling direction as it moves from the one side to the other side in the arrangement direction.

6. The yarn cutting and suction device according to any one of claims 1 to 5, wherein the blade portion is formed so that a contact portion with the yarn varies from the time the blade portion comes into contact with the yarn until the yarn is cut.

7. When viewed from the arrangement direction, the blade portion is formed so as to be positioned on the other side of a direction perpendicular to the yarn running direction and the arrangement direction as it moves from the upstream side to the downstream side of the yarn running direction, 7. The yarn cutting and suction device according to claim 6, wherein, when viewed from the arrangement direction, the inclination angle of the extending direction of the blade portions on one side of the orthogonal direction with respect to the yarn traveling direction is 25 degrees or more and 45 degrees or less.

8. The yarn cutting and suction device according to any one of claims 1 to 7, wherein the cutter has a single blade structure consisting of one of the blade portions.

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