Netting needle and method for manufacturing netting needle

Abstract

To provide a knitting needle capable of improving durability, being easily manufactured, and increasing holding property during use and a manufacturing method of the knitting needle.SOLUTION: A knitting needle 1 of the present invention comprises: a first side plate part 2 and a second side plate part 3, which are connected each other at tips thereof and disposed to face each other; a yarn guiding body plate part 4 that is vertically connected to the first side plate part 2 and the second side plate part 3 and allows a yarn to be wound therearound; yarn storage spaces 7, 7 consisting of the yarn guiding body plate part 4 and the first side plate part 2 and the second side plate part 3 on front and rear sides of the yarn guiding body plate part 4. The knitting needle is integrally formed of aluminum alloy and has Ra 1.0 or less of surface roughness at each part and corner parts constituting each part have curved surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fishing needle and a method for manufacturing the fishing needle. [Background technology]

[0002] A net needle used for weaving or repairing landing nets or fishing nets is known (Patent Document 1). Conventional net needles have been made of bamboo, wood, resin, or stainless steel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 8-54 Summary of the Invention [Problem to be solved by the invention]

[0004] Net needles made of bamboo, wood, or resin have the problem that their material and shape are easily changed due to deterioration over time. When the material and shape of the net needle change, friction between the net needle and fishing nets, etc. increases, and the net needle becomes more likely to get caught in the fishing nets, etc., reducing workability and making the net more likely to break. In addition, stainless steel net needles have the problem that they are difficult to process and the processing costs are high. In addition, conventional net needles have the problem that the thickness of the wound thread increases and decreases, making the net needle difficult to hold and reducing work efficiency.

[0005] From this perspective, an object of the present invention is to provide a net needle that can be easily manufactured while improving durability and that can be easily gripped during use, and a method for manufacturing the net needle. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a knitting needle comprising a first side plate portion and a second side plate portion arranged opposite each other and whose tips are connected to each other, a thread hook main body plate portion connected perpendicularly to the first side plate portion and the second side plate portion and around which a thread is wound, and a thread storage space formed by the thread hook main body plate portion, the first side plate portion and the second side plate portion on the front and back of the thread hook main body plate portion, the knitting needle being integrally formed from an aluminum alloy, the surface roughness of each portion being Ra1.0 or less, and the corners constituting each portion being curved.

[0007] According to this configuration, since it is made of aluminum alloy, the material and shape are less likely to change compared to bamboo, wood, or resin, and durability can be improved. In addition, when weaving or repairing fishing nets, etc., it is possible to prevent increased friction with the fishing nets, etc., and to prevent snagging, so workability does not decrease. In addition, since it is made of aluminum alloy, it is softer and easier to process compared to stainless steel, and processing costs can be reduced. In addition, since it is made of aluminum alloy, it is relatively lightweight and has excellent recyclability.

[0008] Furthermore, since the thread-receiving space is provided, the thread wound around the thread hook main body plate portion is received in the thread-receiving space, which improves the gripping property during use.

[0009] It is also preferable that the height dimensions of the first side plate portion and the second side plate portion decrease toward the tip end. According to this configuration, the net hooks can be easily passed through the holes of the fishing net or the like.

[0010] In addition, it is preferable that the thread hook main body plate portion comprises a main body portion connected to the first side plate portion and the second side plate portion, and a thread hooking protrusion portion extending from the main body portion toward the tip side, and that the plate thickness of the tip of the thread hooking protrusion portion is smaller than the plate thickness of the main body portion. According to this configuration, it becomes easier to wind the yarn around the net needle, thereby improving workability.

[0011] It is also preferable that the corner has a radius of curvature of 0.3 mm or more. This configuration can improve the workability when weaving or repairing fishing nets, etc.

[0012] The present invention also provides a method for manufacturing a net needle, the net needle comprising: a first side plate portion and a second side plate portion arranged opposite each other and having their tips connected to each other; a thread hook main body plate portion connected perpendicularly to the first side plate portion and the second side plate portion and around which a thread is wound; and a yarn storage space formed by the thread hook main body plate portion, the first side plate portion and the second side plate portion on the front and back of the thread hook main body plate portion, the method including a first step of processing an aluminum alloy extrusion material having an H-shaped cross section to form an intermediate member comprising a pair of flanges, a web connecting the flanges to each other and a notch formed in the web; a second step of welding the tips of the flanges to each other while bending them so that their tips are close to each other; and a third step of polishing the intermediate member after the second step by barrel polishing, the third step being characterized in that the surface roughness of each portion is set to Ra 1.0 or less and the corners of each portion are set to have curved surfaces.

[0013] According to this configuration, since it is made of aluminum alloy, it is softer and easier to process than stainless steel, and processing costs can be reduced. In addition, in the barrel polishing of the third step, surface roughness and corner shaping can be performed in one step, making it easy to manufacture. Furthermore, since it is made of aluminum alloy, the material and shape are less likely to change compared to bamboo, wood, or resin, and durability can be increased. Furthermore, when weaving or repairing fishing nets, etc., it is possible to prevent increased friction with the fishing nets, etc., and to prevent snagging, improving workability. Furthermore, since it is made of aluminum alloy, it is relatively lightweight and has excellent recyclability.

[0014] Furthermore, since the thread-accommodating space is formed, the thread wound around the thread hook main body plate portion is accommodated in the thread-accommodating space, which improves gripping ability during use.

[0015] In the first step, the tips of the flanges are preferably processed so that the height dimension decreases toward the tips. According to this configuration, the height dimensions of the first side plate portion and the second side plate portion become smaller toward the tip, so that the net hooks can be easily passed through the holes in a fishing net or the like.

[0016] In the third step, it is preferable that the radius of curvature of the corner is set to 0.3 mm or more. This configuration can improve the workability when weaving or repairing fishing nets, etc. Effect of the Invention

[0017] According to the present invention, the durability can be improved, the manufacturing process can be simplified, and the gripping ability during use can be improved. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a perspective view of the net needle of the present embodiment. [Diagram 2] 1A and 1B are diagrams of a net needle according to the present embodiment, in which (a) is a plan view and (b) is a side view. [Diagram 3] 1A and 1B are diagrams of the netting needle of this embodiment, where (c) is a front view and (d) is a rear view. [Figure 4] FIG. 2(a) is a cross-sectional view taken along line AA of FIG. [Diagram 5] FIG. 3 is a cross-sectional view taken along line BB of FIG. [Figure 6] FIG. 2( a ) is a cross-sectional view taken along the line CC in FIG. [Figure 7] FIG. 3 is a cross-sectional view taken along line DD in FIG. [Figure 8] FIG. [Figure 9] FIG. 4 is a perspective view of a first intermediate member. [Figure 10] FIG. 4 is a perspective view of a second intermediate member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] [composition] FIG. 1 is a perspective view of the net needle 1 of this embodiment. FIG. 2 is a view of the net needle 1 of this embodiment, where (a) is a plan view and (b) is a side view. FIG. 3 is a view of the net needle 1 of this embodiment, where (c) is a front view and (d) is a rear view. FIG. 4 is a cross-sectional view taken along line AA in FIG. 2(a). FIG. 5 is a cross-sectional view taken along line BB in FIG. 2(a). FIG. 6 is a cross-sectional view taken along line CC in FIG. 2(a). FIG. 7 is a cross-sectional view taken along line DD in FIG. 2(a).

[0020] The net needle 1 is a tool used for weaving and repairing landing nets and fishing nets. The net needle 1 is made of an aluminum alloy and is integrally formed. The material (type) of the aluminum alloy may be appropriately selected in consideration of workability and manufacturing costs. The net needle 1 comprises a first side plate portion 2, a second side plate portion 3, and a thread hook main body plate portion 4. The plate thicknesses of the first side plate portion 2, the second side plate portion 3, and the thread hook main body plate portion 4 may be the same or different, and each plate thickness is constant and may be appropriately selected in the range of 1 to 15 mm, preferably 2 to 5 mm, depending on the application.

[0021] The first side plate portion 2 and the second side plate portion 3 are portions that form the outer shape of the sides of the net needle 1. The first side plate portion 2 and the second side plate portion 3 are connected at their respective tips and disposed opposite each other. The first side plate portion 2 and the second side plate portion 3 are portions that are gripped when the net needle is in use.

[0022] As shown in FIG. 2(b) and FIG. 3(c), the height of the first side plate portion 2 and the second side plate portion 3 gradually decreases toward the tip. In other words, the tip portions of the first side plate portion 2 and the second side plate portion 3 are tapered in the height direction of the net needle 1. As a result, the front surface 21 of the first side plate portion 2 can be divided into surfaces 211 and 212. The surface 211 is flat. The surface 212 is the surface of the tip portion of the first side plate portion 2, and is inclined toward the center of the height direction of the net needle 1 more than the surface 211. The back surface 22 of the first side plate portion 2 can be divided into back surfaces 221 and 222. The back surface 221 is flat. The back surface 222 is the back surface of the tip portion of the first side plate portion 2, and is inclined toward the center of the height direction of the net needle 1 more than the back surface 221. The front surface 31 of the second side plate portion 3 can be divided into surfaces 311 and 312. The surface 311 is flat. The front surface 312 is the front surface of the tip of the second side plate portion 3, and is inclined more toward the center in the height direction of the net needle 1 than the front surface 311. The back surface 32 of the second side plate portion 3 can be divided into back surfaces 321 and 322. The back surface 321 is flat. The back surface 322 is the back surface of the tip of the second side plate portion 3, and is inclined more toward the center in the height direction of the net needle 1 than the back surface 321.

[0023] The thread hook main body plate 4 is a portion around which a thread (net thread) (not shown) is wound. The thread hook main body plate 4 is connected perpendicularly to the first side plate 2 and the second side plate 3 at approximately the center in the height direction of the first side plate 2 and the second side plate 3. The thread hook main body plate 4 comprises a main body 5 and a thread hooking projection 6. The main body 5 is a portion connected to the first side plate 2 and the second side plate 3. The thread hooking projection 6 is a portion for hooking one end of the thread to be wound around the main body 5.

[0024] As shown in Figs. 1 and 6, the plate thickness (dimension in the height direction of the net needle 1) of the tip of the threading protrusion 6 is smaller than the plate thickness of the main body 5. In other words, the tip of the threading protrusion 6 is tapered in the height direction of the net needle 1. As a result, the front surface 61 of the threading protrusion 6 can be divided into surfaces 611 and 612. The surface 611 is flat. The surface 612 is the surface of the tip of the threading protrusion 6, and is inclined toward the center in the height direction of the net needle 1 more than the surface 611. In addition, the back surface 62 of the threading protrusion 6 can be divided into back surfaces 621 and 622. The back surface 621 is flat. The back surface 622 is the back surface of the tip of the threading protrusion 6, and is inclined toward the center in the height direction of the net needle 1 more than the back surface 621.

[0025] 2(b), 6 and 7, the thickness of the tip of the threading projection 6 is smaller than the height of the tips of the first side plate 2 and the second side plate 3. As shown in Fig. 7, the threading projection 6 is located approximately in the center of the net needle 1 in the height direction.

[0026] The netting needle 1 has yarn accommodating spaces 7, 7 on the front and back of the yarn hook main body plate part 4, which are composed of the yarn hook main body plate part 4, the first side plate part 2 and the second side plate part 3. The yarn accommodating spaces 7, 7 can accommodate the yarn wound around the yarn hook main body plate part 4.

[0027] The netting needle 1 also has a thread winding end 8 which is made up of the rear end of the thread hook main body plate part 4, the rear end of the first side plate part 2, and the rear end of the second side plate part 3. The thread winding end part 8 is a recess which opens rearward at the rear end of the netting needle 1. The thread winding end part 8 is the part where the thread wound around the thread hook main body plate part 4 is secured.

[0028] The netting needle 1 also has a hole 9 surrounded by the tip side of the threading main body plate 4 and the first and second side plates 2 and 3. The hole 9 penetrates in the plate thickness direction. The threading projection 6 is provided in the widthwise center of the main body 5 and extends toward the tip side of the netting needle 1, and protrudes in an elongated shape into the hole 9.

[0029] [Surface roughness] The surface roughness (surface roughness) of each portion of the net needle 1 is Ra1.0 or less. That is, the surface roughness of the front surface 21, the back surface 22, the side surfaces 23, 24, and the rear end surface 25 of the first side plate portion 2 is Ra1.0 or less. The surface roughness of the front surface 31, the back surface 32, the side surfaces 33, 34, and the rear end surface 35 of the second side plate portion 3 is Ra1.0 or less. The surface roughness of the front surface 51, the back surface 52, the front side surfaces 53, 53, and the rear side surface 54 of the main body portion 5 is Ra1.0 or less. Furthermore, the surface roughness of the front surface 61, the back surface 62, and the side surfaces 63, 64 of the threading projection portion 6 is Ra1.0 or less.

[0030] [Corner curve] The corners constituting each part of the net needle 1 are curved. More specifically, as shown in Fig. 3(c), Fig. 3(d), Fig. 4, Fig. 5, and Fig. 7, each corner formed by the surface 21 (211, 212) and the side surfaces 23, 24 of the first side plate portion 2 is curved. Each corner formed by the back surface 22 (221, 222) and the side surfaces 23, 24 of the first side plate portion 2 is curved. In addition, each corner formed by the surface 31 (311, 312) and the side surfaces 33, 34 of the second side plate portion 3 is curved. Each corner formed by the back surface 32 (321, 322) and the side surfaces 33, 34 of the second side plate portion 3 is curved.

[0031] 2(a), each corner formed by the side surfaces 23, 24 and rear end surface 25 of the first side plate portion 2 is curved. Each corner formed by the side surfaces 33, 34 and rear end surface 35 of the second side plate portion 3 is curved.

[0032] 2(b), a corner formed by the front surface 311 and rear end surface 35 of the second side plate 3, and a corner formed by the back surface 321 and rear end surface 35 of the second side plate 3 are curved. Similarly, a corner formed by the front surface 211 and rear end surface 25 of the first side plate 2, and a corner formed by the back surface 221 and rear end surface 25 of the first side plate 2 are curved.

[0033] 1 and 2, each corner formed by the front side surfaces 53, 53 of the main body 5 and the side surfaces 63, 64 of the threading projection 6 is curved. In addition, the tip side surface 65 of the threading projection 6 is curved. As described above, each corner of the first side plate 2, the second side plate 3 and the threading main body plate 4 is curved.

[0034] In this embodiment, each of the above corners (edges) is arc-shaped when viewed in cross section, with a radius of curvature of 0.3 mm or more. If the corners are less than 0.3 mm, they will come into contact with the net, making the net more likely to break, and the corners will also be more likely to wear. Note that each corner only needs to be formed with a curved surface, and may be elliptical or quadratic curved when viewed in cross section.

[0035] [Manufacturing method] Next, a method for manufacturing the net needle will be described. Fig. 8 is a perspective view of an extruded material. Fig. 9 is a perspective view of a first intermediate member. Fig. 10 is a perspective view of a second intermediate member. In the method for manufacturing the net needle according to this embodiment, first to third steps are carried out.

[0036] The first step is a step of forming an intermediate member made of an aluminum alloy. In the first step, an extrusion material 100 made of an aluminum alloy and having an H-shaped cross section as shown in FIG. 8 is prepared. Also, as shown in FIG. 9, in the first step, the extrusion material 100 is cut to a predetermined length, and pressed or cut to form notches 104, 105 on the front and rear sides of the web 103. As a result, a first intermediate member 110 as shown in FIG. 9 is formed. Also, in the first step, the first intermediate member 110 shown in FIG. 9 is pressed or cut to make the tips of the flanges 101, 102 tapered so that the height dimension decreases toward the tip. Also, the tip of the protrusion 106 formed by forming the notch 104 is tapered so that the height dimension decreases toward the tip, and the plate thickness of the tip of the protrusion 106 is made smaller than the plate thickness of the web 103. As a result, a second intermediate member 120 as shown in FIG. 10 is formed.

[0037] The second step is a step of processing the second intermediate member 120. In the second step, the second intermediate member 120 shown in Fig. 10 is bent so that the tips of the flanges 101, 102 are brought close to each other, and the tips are welded to each other. This results in the formation of a third intermediate member (not shown) having the same external shape as the net needle 1 shown in Fig. 1.

[0038] In the third step, the third intermediate member is polished by barrel polishing. Barrel polishing is a processing method in which polishing stones (media), workpieces (third intermediate member), compound (lubricant), water, etc. are charged into a barrel tank, and a relative motion difference (friction) or free pressure welding is generated by an externally applied motion to polish the workpiece. Barrel polishing includes, for example, a rotary type, a vibration type, a centrifugal type, and a flow type, and any of these types can be applied in this embodiment. In addition, the type of media and compound used, the duration of use, etc. can be designed as appropriate.

[0039] That is, in the third step, the conditions for barrel polishing are set so that the surface roughness of each portion of the net needle 1 is Ra1.0 or less and the radius of curvature of each corner is 0.3 mm or more. Through the above steps, the net needle 1 is completed.

[0040] [How to use] Next, a method of using the net needle 1 will be described. First, one end of the thread is hooked on the thread hooking projection 6, and the thread is wound back and forth between the thread winding end 8 and the hole 9. This causes the thread to be wound multiple times in the longitudinal direction of the main body 5. Next, while letting out the thread from the main body 5, the thread is passed alternately up and down from the tips of the first side plate 2 and the second side plate 3 through the warp threads or adjacent net holes. This allows fishing nets and the like to be woven or repaired.

[0041] [Effects] According to the net needle 1 according to the present embodiment described above, since it is made of an aluminum alloy, the material and shape are less likely to change compared to those made of bamboo, wood, or resin, and durability can be improved. In addition, when weaving or repairing a fishing net, etc., it is possible to prevent an increase in friction with the fishing net, etc., and to prevent snagging, so there is no decrease in workability. In addition, since it is made of an aluminum alloy, it is softer and easier to process compared to stainless steel, and processing costs can be reduced. In addition, since it is made of an aluminum alloy, it is relatively lightweight and has excellent recyclability.

[0042] Furthermore, since the thread storage spaces 7, 7 are provided, the thread wound around the thread hook main plate portion 4 is stored in the thread storage spaces 7, 7. Therefore, regardless of whether the amount of thread wound around the thread hook main plate portion 4 is increased or decreased, the hands will grip the first side plate portion 2 and the second side plate portion 3. This allows the thread hook to be held with a consistent sensation (feel) regardless of whether the amount of thread wound around the thread hook is increased or decreased, improving the grip when in use.

[0043] In this embodiment, the height dimensions of the first side plate portion 2 and the second side plate portion 3 become smaller toward the tip. With this configuration, the net hooks 1 can be easily passed through holes in a fishing net or the like.

[0044] In this embodiment, the thickness of the tip of the threading projection 6 is smaller than the thickness of the main body 5. This configuration makes it easier to wind the thread around the net needle 1, improving workability.

[0045] In this embodiment, the radius of curvature of the corners of each portion is 0.3 mm or more. This configuration can further improve the workability when weaving or repairing fishing nets, etc.

[0046] In this embodiment, the net needle 1 having the above-mentioned surface roughness and curvature radius of the corner can be manufactured in a single process by barrel polishing. This reduces the manufacturing cost. Furthermore, burrs generated by pressing, cutting, or the like can be easily removed by barrel polishing.

[0047] In the first step of this embodiment, the tips of the flanges 101, 102 are processed so that the height dimension decreases toward the tips. With this configuration, the height dimensions of the first side plate portion 2 and the second side plate portion 3 decrease toward the tips, so that the net hook 1 can be easily passed through the holes of a fishing net or the like.

[0048] In the third step of this embodiment, the radius of curvature of the corners of each part of the net needle 1 is set to be 0.3 mm or more. This configuration can further improve the workability when weaving or repairing fishing nets, etc.

[0049] [Variations] (a): The surface roughness of each of the front surface, back surface, side surface and end surface may be Ra1.0 or less. (b): The corners constituting each part of the netting needle 1 can be selectively curved. For example, each corner formed by the front surface 51 and the back surface 52 of the main body 5 and the front side surfaces 53, 53 can be curved. Also, each corner formed by the front surface 51 and the back surface 52 of the main body 5 and the rear side surface 54 can be curved. Also, each corner formed by the front surface 61 (611, 612) and the side surfaces 63, 64 of the threading protrusion 6 can be curved. Also, each corner formed by the back surface 62 (621, 622) and the side surfaces 63, 64 of the threading protrusion 6 can be curved. Also, each corner formed by the front surface 612 and the back surface 622 of the threading protrusion 6 and the tip side surface 65 can be curved.

[0050] (c) In addition, the components of the present invention can be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0051] 1 net needle 2 First side plate part 3 Second side plate part 4. Thread holder main body plate 5 Main body 6 Thread hook protrusion 7 Thread storage space 8 End of bobbin winding 9 Hole 21,31,51,61,211,212,311,312,611,612 Surface 22,32,52,62,221,222,321,322,621,622 Back side 23,24,33,34,63,64 Side 25,35 Rear end surface 53 Front side 54 Posterior side 65 Tip side 100 Extrusions 101,102 Flange 103 Web 104,105 Notch 106 Protrusion 110 First intermediate member 120 Second intermediate member

Claims

1. a first side plate portion and a second side plate portion whose leading ends are connected to each other and disposed opposite each other; a thread hook body plate portion that is connected perpendicularly to the first side plate portion and the second side plate portion and on which a thread is wound; a yarn storage space formed by the yarn hook main body plate portion, the first side plate portion, and the second side plate portion on the front and rear sides of the yarn hook main body plate portion, It is integrally formed from an aluminum alloy. The netting needle is characterized in that the surface roughness of each portion is Ra 1.0 or less, and the corners constituting each portion are curved.

2. 2. The netting needle according to claim 1, wherein the first side plate portion and the second side plate portion have heights that decrease toward their tips.

3. The yarn hook main body plate portion includes a main body portion connected to the first side plate portion and the second side plate portion, and a yarn hooking protrusion portion extending from the main body portion toward a tip side, 3. The netting needle according to claim 1, wherein the thickness of the tip of the threading projection is smaller than the thickness of the main body.

4. 4. The netting needle according to claim 1, wherein the corner has a radius of curvature of 0.3 mm or more.

5. A method for manufacturing a net needle, comprising the steps of: The net needle is a first side plate portion and a second side plate portion whose leading ends are connected to each other and disposed opposite each other; a thread hook body plate portion that is connected perpendicularly to the first side plate portion and the second side plate portion and on which a thread is wound; a yarn storage space formed by the yarn hook main body plate portion, the first side plate portion, and the second side plate portion on the front and rear sides of the yarn hook main body plate portion, A first step of processing an aluminum alloy extrusion material having an H-shaped cross section to form an intermediate member having a pair of flanges, a web connecting the flanges, and a notch formed in the web; a second step of bending the flanges so that their tips are close to each other while welding the tips together; A third step of polishing the intermediate member after the second step by barrel polishing, A method for manufacturing a net needle, characterized in that in the third step, the surface roughness of each portion is set to Ra 1.0 or less, and the corners of each portion are set to have curved surfaces.

6. 6. The method for manufacturing a net needle according to claim 5, wherein in the first step, the tips of the flanges are processed so that the height dimension decreases toward the tips.

7. 7. The method for manufacturing a net needle according to claim 5, wherein in the third step, the radius of curvature of the corner is set to be 0.3 mm or more.

Images