Thread winding device and thread winding method

Abstract

To enable thread winding even on a narrow and thin netting needle without deteriorating or breaking the base of a thread hooking piece. [Solution] A thread winding device that winds thread around a knitting needle 1, characterized by comprising a first deformation section that can deform the thread hook piece 4 of the knitting needle in a first direction -x relative to the plane of the knitting needle, a second deformation section that can deform the tip portion 2, which is the end of the knitting needle on the thread hook piece side, in a second direction x that is opposite to the first direction, and a thread nozzle that can hook the thread from the thread hook piece to a concave thread hook portion, which is the end of the knitting needle opposite the tip portion, and wind the thread between the two.

Description

[Technical Field]

[0001] The present invention relates to a thread winding device and a thread winding method for winding thread onto a netting needle for sewing fishing nets, sports nets, civil engineering nets, etc. [Background technology]

[0002] Winding yarns such as twisted yarns onto netting needles is usually done manually by an operator, but some of the process is automated by a winding device.

[0003] Netting needles are made from a variety of materials, including ABS resin, Duracon, nylon, bamboo, wood, and metal, and come in a variety of sizes.

[0004] Patent Documents 1 and 2 both describe a thread winding device that presses the thread hook piece against the plane of the needle to create a gap between the needle and the plane, thereby making it easier to hook the thread on the thread hook piece. [Prior art documents] [Patent documents]

[0005] Patent document 1: Japanese Patent Application Laid-Open No. 5-263343 Patent Document 2: Japanese Utility Model Application Laid-Open Publication No. 8-000054 Summary of the Invention [Problem to be solved by the invention]

[0006] However, for narrow and thin netting needles, if the thread hook piece is pressed hard or repeatedly as in the winding devices described in Patent Documents 1 and 2, there is a problem that the base of the thread hook piece may deteriorate or even break.

[0007] The present invention aims to solve the above problems and to wind a thread on a narrow and thin netting needle without deterioration or breakage of the base of the thread hooking piece. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a yarn winding device for winding a yarn around a netting needle, a first deformation portion capable of deforming the thread hook piece of the needle in a first direction relative to a plane of the needle; a second deformation portion capable of deforming a tip portion, which is an end portion of the netting needle on the thread hook side, in a second direction opposite to the first direction; The present invention provides a thread winding device characterized by comprising a thread nozzle that can hook the thread from the thread hook piece to a concave thread hook portion, which is the end of the netting needle opposite the tip portion, and wind the thread between the two.

[0009] With this configuration, by both deforming the thread hook piece and deforming the tip in the opposite direction, the gap required for thread hooking can be secured with a small deformation angle of the thread hook piece relative to the netting needle, and therefore the base of the thread hook piece does not deteriorate even when used with a narrow and thin netting needle, and thread can be wound without breaking.

[0010] The thread winding device may be configured such that the first deformation portion has a pressing piece that can press the thread hook piece in the first direction, and the second deformation portion has a needle holder that can hold the needle and pull the tip portion in the second direction.

[0011] With this configuration, the thread hooking piece can be deformed in the first direction and the tip portion can be deformed in the second direction at the same time.

[0012] The thread winding device may be configured such that the second deformation section has a needle holder base that holds the needle and a circular cutout plate, and the circular cutout plate moves in the second direction while a roller provided on the needle holder base abuts against the inner circumference of the circular cutout plate and rotates, thereby moving the needle holder base in the second direction and pulling the tip portion in the second direction.

[0013] With this configuration, the tip of the netting needle can be pulled in the second direction while rotating the netting needle.

[0014] The yarn winding device may be configured such that the timing at which the first deformation section deforms the yarn hook piece in the first direction, the timing at which the second deformation section deforms the tip portion in the second direction, and the timing at which the yarn nozzle hooks the yarn onto the yarn hook piece are synchronized.

[0015] With this configuration, the thread hooking piece is deformed and the tip end is deformed in the opposite direction to secure a gap necessary for threading, and the thread can be hooked on the thread hooking piece, so that the base of the thread hooking piece does not deteriorate even when a narrow and thin netting needle is used, and the thread can be stably wound without breaking.

[0016] The thread winding device may be configured such that the deformation angle of the tip of the thread hook piece relative to the plane of the needle when deformed in the second direction is greater than the deformation angle of the thread hook piece relative to the plane of the needle when deformed in the first direction.

[0017] With this configuration, the necessary gap can be secured even if the deformation angle of the thread hook piece relative to the plane of the needle is small, and deterioration or breakage of the base of the thread hook piece can be avoided.

[0018] The yarn winding device may be configured such that a cam follower of the yarn nozzle rides up on a protrusion provided on the yarn winding device, causing the yarn nozzle to move forward toward the netting needle.

[0019] With this configuration, the cam follower of the yarn nozzle rides up onto the convex portion at the timing of threading, allowing the yarn nozzle to quickly approach the netting needle and enabling the yarn to be threaded onto the threading piece at high speed.

[0020] In addition, in order to solve the above-mentioned problems, the present invention provides a thread winding method for winding a thread around a knitting needle, which executes a needle deformation step of deforming a thread hook piece in a first direction relative to the plane of the knitting needle and deforming a tip end portion relative to the knitting needle in a second direction opposite to the first direction, a thread hook piece threading step of threading the thread on the thread hook piece simultaneously with the needle deformation step, and a recessed thread hook threading step of threading the thread on a recessed thread hook portion which is the end portion of the knitting needle opposite to the tip end portion.

[0021] With this configuration, the thread hook piece is deformed and the tip end is deformed in the opposite direction, so that the clearance required for thread hooking can be secured with a small deformation angle of the thread hook piece, and therefore thread can be wound on a narrow and thin netting needle without deterioration or breakage of the base of the thread hook piece. [Effects of the Invention]

[0022] The thread winding device and thread winding method of the present invention deform the thread hook piece and deform the tip end in the opposite direction, thereby ensuring the clearance required for threading with a small deformation angle of the thread hook piece, and therefore thread can be wound without deterioration or breakage of the base of the thread hook piece even for a narrow and thin netting needle. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 2 is a diagram illustrating a net needle according to the first embodiment of the present invention. [Figure 2] 1 is a diagram showing a state in which the bobbin winder according to the first embodiment of the present invention holds a net needle. [Figure 3] 4A to 4C are diagrams showing how the thread hooking piece and tip of the netting needle are deformed in the first embodiment of the present invention. [Figure 4] FIG. 2 is a diagram showing how a thread is hooked onto a thread hook piece of a netting needle in the first embodiment of the present invention. [Figure 5] FIG. 2 is a diagram showing a time chart of each part in the first embodiment of the present invention. [Figure 6] 1 is a photograph of a state in which a thread is wound around a netting needle in Example 1 of the present invention. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0024] A thread winding device and a thread winding method according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram illustrating a knitting needle according to the first embodiment of the present invention, with (a) being a front view and (b) being a side view. FIG. 2 is a diagram illustrating a state in which the knitting needle is held by the thread winding device according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating how the thread hook piece and tip of the knitting needle according to the first embodiment of the present invention are deformed, with (a) showing the states at angles of 0° and 180° in FIG. 5 and (b) showing the states at angles of 90° and 270° in FIG. 5. FIG. 4 is a diagram illustrating how a thread is hooked onto the thread hook piece of the knitting needle according to the first embodiment of the present invention, with (a) being a side view and (b) being a top view. FIG. 5 is a diagram illustrating a time chart of each part according to the first embodiment of the present invention. FIG. 6 is a photograph illustrating a state in which a thread has been wound around the knitting needle according to the first embodiment of the present invention.

[0025] (Thread winding device) A netting needle 1 in Example 1 will be described with reference to FIG. 1. The netting needle 1 is a tool used for sewing and repairing nets such as fishing nets, sports nets, and civil engineering nets. As shown in FIG. 6, thread is wound around the netting needle 1 before use. Twisted thread, which is a type of thread that has been twisted, is typically used. The netting needle 1 may be made of ABS resin, Duracon, nylon, or the like. As shown in FIG. 1, the netting needle 1 has an overall flat surface (surface S) and a flat back surface (back surface B). It has a length L of several centimeters to several tens of centimeters, a width W from the left side LS to the right side RS of 1 cm to several centimeters, and a thickness T of approximately 2 mm to 5 mm. One end of the netting needle 1 has a pointed tip 2, and the other end has a recessed thread hook 5 that facilitates thread hooking. Near the tip 2, there is also a thread hook 4, where the thread is hooked. In this application, the surface S or the back surface B is also referred to as a flat surface.

[0026] The thread can be wound by being stretched between the left end 6 or right end 7 of the space at the base of the thread hook piece 4 of the needle 1 and the concave thread hooking portion 5. In the present application, this spool is also referred to as being stretched between the thread hook piece 4 and the concave thread hooking portion 5.

[0027] The thread winding device 10 in Example 1 comprises a first deformation section capable of deforming the thread hook piece 4 in a first direction (-x direction in Figure 3(b)) relative to the plane of the knitting needle 1, a second deformation section capable of deforming the tip portion 2, which is the end of the knitting needle 1 on the thread hook piece side, in a second direction (x direction in Figure 3(b)) opposite to the first direction relative to the plane of the knitting needle 1, and a thread nozzle 21 that can hook the thread from the thread hook piece 4 to a concave thread hook portion 5, which is the end opposite to the tip portion 2, and wind the thread between them.

[0028] The holding of the needle 1 in the bobbin winding device 10 will be described with reference to Figure 2. The needle 1 is held on the needle holder 13 with the tip 2 facing downward (-z direction in Figure 2). Both sides of the needle 1 are supported by needle side supports 11. The needle 1 is inserted into the needle side supports 11 from above (z direction in Figure 2) and the tip 2 is inserted into the hole in the needle holder 13. This allows the needle 1 to be held with the thread hook piece 4 exposed. The needle 1 is then held by pressing the lower end of the thread hooking space 3 with a holding piece (not shown).

[0029] The second deformation section in Example 1 has a needle holder 13 and a circular cutout plate 14. The needle holder 13, into which the tip 2 of the needle 1 is inserted, rotates together with the rotating table 12 and the needle side support 11 around the z-axis as its rotation axis. The rotation direction may be either clockwise or counterclockwise, but in Example 1, it rotates counterclockwise when viewed from above. During this rotation, rollers (not shown) provided on the needle holder 13 abut against the inner periphery of the circular cutout plate 14, while the needle holder 13 repeatedly rotates from 0° to 360° as shown in FIG. 5.

[0030] The needle holder 13 rotates together with the rotating table 12, and the circular cutout plate 14 is configured to be movable at least in the x direction relative to the rotating table 12. By moving the circular cutout plate 14 in the x direction, the needle holder 13 also moves in the x direction. On the other hand, since the rotating table 12 and the needle side supports 11 do not move in the x direction, the tip 2 of the needle 1 supported by the needle side supports 11 can be deformed in the x direction relative to the needle 1. In other words, by attracting the circular cutout plate 14 in the x direction, the needle holder 13 and the needle 1 can be attracted in the x direction even while the needle holder 13 is rotating.

[0031] The thread winding device 10 in Example 1 includes a first deformation section that deforms the thread hook piece 4 in a first direction (-x direction in Figure 3(b)) relative to the plane of the knitting needle 1, a second deformation section that deforms the tip portion 2, which is the end of the knitting needle 1 on the thread hook piece 4 side, in a second direction (x direction in Figure 3(b)) opposite to the first direction, and a thread nozzle 21 that hooks the thread from the thread hook piece 4 to the concave thread hook portion 5, which is the end opposite to the tip portion, and winds the thread between them (see Figure 4).

[0032] In Example 1, the first direction is defined as the -x direction and the second direction is defined as the x direction, but this is not necessarily limited to this and can be changed as appropriate. For example, the first direction may be defined as the x direction and the second direction as the -x direction. Furthermore, by rotating the direction in which the netting needles 1 are held by 90°, the first direction may be defined as the -y direction and the second direction as the y direction, as long as the first direction and the second direction are opposite to each other.

[0033] Furthermore, in the first embodiment, the first deformation section has a pressing piece 15 that presses the thread hook piece 4 in a first direction (-x direction) against the plane of the needle 1 to deform it, while the second deformation section has a needle holder 13 and a circular cutout plate 14 that pulls the tip end 2 in the x direction, which is opposite to the first direction, to deform it. However, this is not limited to this and can be modified as appropriate. For example, the first deformation section may be configured as a pulling piece (not shown) to deform by pulling it, and the second deformation section may be configured as a pressing base to deform by pressing it. That is, the thread hook piece 4 and tip end 2 of the needle 1 may be pressed and pulled little by little in opposite directions against the plane of the needle 1. In this way, by both deforming the thread hook piece 4 and deforming the tip end 2 in the opposite direction, the gap g required for threading can be secured even with a small deformation angle of the thread hook piece 4. Therefore, even when a needle has a narrow width W and a thin thickness T, the base of the thread hook piece does not deteriorate and the thread can be wound without breaking.

[0034] In Example 1, the deformation angle θ of the base of the thread hook piece 4 is approximately 8°, and the deformation angle φ of the tip portion 2 is approximately 12°, which is larger than the deformation angle of the thread hook piece 4 (see Figure 3(b)). This is because there is little risk of deterioration even if the tip portion 2 is deformed more significantly. In this way, the deformation of the thread hook piece 4 and the deformation of the tip portion 2 in the opposite direction can obtain the gap g of 5 mm required for threading when the twisted yarn has a diameter of 2 mm. If the tip portion 2 is not deformed as in the conventional method, the thread hook piece 4 must be pressed hard to obtain the gap g of 5 mm required for threading, thereby setting the deformation angle θ to approximately 16°, which may cause deterioration or breakage of the base of the thread hook piece 4. Experiments have shown that netting needles thinner than those made of ABS resin with a width W of 20 mm and a thickness T of 4.4 mm are more likely to break.

[0035] Furthermore, when the thread hooking piece 4 and the tip portion 2 are deformed to hook the yarn, the cam follower 22 in the yarn nozzle 21 holding the yarn 8 rides up onto a convex portion 31 (a mountain-shaped portion with a slope, with the top of the mountain facing the needle 1) provided on the winding device 10, causing the yarn nozzle 21 to move quickly forward so as to approach the needle 1. This makes it easier to quickly hook the yarn into the gap g created between the thread hooking piece 4 and the main body of the needle 1.

[0036] (Thread winding method) The thread winding method in Example 1 carries out a needle deformation process in which the thread hook piece 4 of the needle 1 is deformed in a first direction (-x direction in Figure 5) and the tip 2 of the needle 1 is deformed in a second direction (x direction in Figure 5) opposite to the first direction; a thread hook piece threading process in which a thread is hooked on the thread hook piece 4 simultaneously with the needle deformation process; and a concave thread hook threading process in which a thread is hooked on the concave thread hook piece 5, which is the end of the needle 1 in the opposite direction to the tip 2.

[0037] The movement when the yarn is hooked onto the yarn hooking piece 4 will be described in detail with reference to the time chart shown in Figure 5. As described above, the needle holder 13 rotates clockwise in a top view around the z-axis as its rotation axis, with one rotation being from 0° to 360°. At the same time, the yarn nozzle 21 rotates around the x-axis as its rotation axis from 0° to 360°. This one rotation allows the yarn to be hooked once from the yarn hooking piece 4 to the recessed thread hooking portion 5. This rotation from 0° to 360° can be repeated multiple times to wind the yarn multiple times. Figure 3(a) shows the state of the needle holder 13 at angles of 0° and 180° in Figure 5, where the pressing piece 15 does not move forward in the pressing direction (-x direction), and the needle holder 13 does not move backward in the pulling direction (x direction). As the needle holder 13 rotates from this state and approaches 90° or 270°, the pressing piece 15 gradually advances, and the needle holder 13 gradually begins to move backward as the circular cutout plate 14 moves. The state in Figure 3(b) shows the state in which the needle holder 13 is at an angle of 90° or 270° in Figure 5, with the pressing piece 15 advancing in the pressing direction (-x direction) to press the thread hook piece 4, and the needle holder 13 moving backward in the pulling direction (x direction) to pull the tip 2. At this timing, as will be described later, the cam follower 22 in the yarn nozzle 21 rides onto the convex portion 31 and quickly approaches the needle 1.

[0038] As the yarn nozzle 21 rotates, the cam follower 22 of the yarn nozzle 21 rides up onto the convex portion 31 at angles of 90° and 270° in Fig. 5, causing the yarn nozzle 21 to quickly move forward so as to approach the thread hooking piece 4 of the needle 1 and hook the yarn on the thread hooking piece 4. Although not shown, the yarn is also hooked on the concave thread hooking portion 5 at angles of 0° and 180° in Fig. 5. In this way, the yarn nozzle 21 rides up onto the convex portion 31 and quickly approaches the needle 1, allowing for high-speed threading.

[0039] Then, the rotation of the needle holder 13 about the z-axis as a rotation axis, the rotation of the yarn nozzle about the x-axis as a rotation axis, the forward pressing of the pressing piece 15, and the backward pulling of the needle holder 13 are repeated multiple times in synchronization, thereby enabling multiple thread windings to be performed at high speed. In the first embodiment, these synchronized operations are performed mechanically by driving a single motor, but a control unit may be provided to synchronize each operation.

[0040] As described above, in the first embodiment of the present invention, a yarn winding device for winding a yarn around a netting needle is provided, a first deformation portion capable of deforming the thread hook piece of the needle in a first direction relative to a plane of the needle; a second deformation portion capable of deforming a tip portion, which is an end portion of the netting needle on the thread hook side, in a second direction opposite to the first direction; The thread winding device is characterized by having a thread nozzle that can wind the thread from the thread hook piece to a concave thread hook portion, which is the end of the netting needle opposite the tip, and wind the thread between the two.By both deforming the thread hook piece and deforming the tip in the opposite direction, the gap required for thread hooking can be secured even with a small deformation angle of the thread hook piece, so that the base of the thread hook piece does not deteriorate or break even on netting needles that are narrow and thin, and thread can be wound.

[0041] Also, there is a thread winding method for winding a thread around a netting needle, a needle deformation step of deforming the thread hook piece in a first direction relative to the plane of the needle and deforming the tip of the needle in a second direction opposite to the first direction; a thread hooking step of hooking a yarn onto the thread hook piece simultaneously with the needle deformation step; a recessed thread hooking step of hooking a thread into a recessed thread hook, which is an end of the netting needle opposite to the tip end; By carrying out both deformation of the thread hook piece and deformation of the tip in the opposite direction, the gap required for thread hooking can be secured even with a small deformation angle of the thread hook piece, and therefore the base of the thread hook piece is not deteriorated and can be wound without breaking even for a narrow and thin netting needle. [Industrial Applicability]

[0042] The winding device and winding method of the present invention can be widely applied to the field of winding threads onto knitting needles. [Explanation of symbols]

[0043] 1: Netting needle 2:Tip 3: Yarn hanging space 4: Thread hook piece 5: Concave thread guide 6:Left end of space 7: Space right end 8: Thread 10: Thread winding device 11: Net needle side support 12: Rotating table 13: Net needle holder 14:Circular cutout board 15: Pressure piece 21: Thread nozzle 22: Cam follower 31: Convex

Claims

1. A thread winding device for winding thread around a netting needle, a first deformation portion capable of deforming the thread hook piece of the needle in a first direction relative to a plane of the needle; a second deformation portion capable of deforming a tip portion, which is an end portion of the netting needle on the thread hook side, in a second direction opposite to the first direction; a thread nozzle that can hook the thread from the thread hook piece to a concave thread hook portion, which is the end of the netting needle opposite the tip portion, and wind the thread between the two.

2. The thread winding device according to claim 1, characterized in that the first deformation portion has a pressing piece that can press the thread hook piece in the first direction, and the second deformation portion has a needle holding base that can hold the needle and pull the tip portion in the second direction.

3. The thread winding device described in claim 1, characterized in that the second deformation section has a needle holder base that holds the needle and a circular cutout plate, and the circular cutout plate moves in the second direction while a roller provided on the needle holder base abuts against the inner circumference of the circular cutout plate and rotates, thereby causing the needle holder base to move in the second direction and pull the tip portion in the second direction.

4. The winding device of claim 1, characterized in that the timing at which the first deformation section deforms the thread hook piece in the first direction, the timing at which the second deformation section deforms the tip portion in the second direction, and the timing at which the yarn nozzle hooks the thread onto the thread hook piece are synchronized.

5. The thread winding device according to claim 1, characterized in that the deformation angle of the tip of the needle relative to the plane of the needle when deformed in the second direction is larger than the deformation angle of the thread hook piece relative to the plane of the needle when deformed in the first direction.

6. 2. The yarn winding device according to claim 1, wherein a cam follower of the yarn nozzle rides up on a protrusion provided on the yarn winding device, causing the yarn nozzle to move forward toward the netting needle.

7. A thread winding method for winding a thread around a netting needle, comprising: a needle deformation step of deforming the thread hook piece in a first direction relative to a plane of the needle and deforming the tip portion of the needle in a second direction opposite to the first direction; a thread hooking step of hooking a yarn onto the thread hook piece simultaneously with the needle deformation step; a concave thread hooking step of hooking the thread into a concave thread hook, which is an end of the netting needle opposite to the tip end.

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