JP2023114322A - Knitting needle and knitting needle manufacturing method - Google Patents

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 The present invention relates to a mesh needle and a method for manufacturing the mesh needle.

BACKGROUND ART Net needles used for knitting or repairing tamo nets and fishing nets are known (Patent Document 1). Conventional net needles are made of bamboo, wood, resin, or stainless steel.

Japanese Utility Model Laid-Open No. 8-54

Net needles made of bamboo, wood, or resin have the problem that their material and shape are likely to change due to deterioration over time. If the material or shape of the net needle changes, the friction between the net needle and the fishing net increases, or the hook becomes more likely to get caught in the fishing net. Moreover, stainless steel net needles have the problem of being difficult to process and of increasing the cost of processing. In addition, since the thickness of the thread wound on the conventional net needle varies, the net needle may be difficult to hold and work efficiency may be reduced.

From such a point of view, it is an object of the present invention to provide a net needle and a method for manufacturing a net needle that can improve durability, can be easily manufactured, and can improve gripability during use. do.

In order to solve the above-mentioned problems, the present invention provides a first side plate portion and a second side plate portion which are arranged to face each other and whose tips are connected to each other, and the first side plate portion and the second side plate portion. A yarn hooking body plate portion that is vertically connected to the yarn hooking body plate portion on which the yarn is wound, and the yarn hooking body plate portion, the first side plate portion, and the second side plate portion on the front and back of the yarn hooking body plate portion. Yarn storage space, integrally formed of an aluminum alloy, each portion having a surface roughness Ra of 1.0 or less, and corners constituting each portion having curved surfaces. is a needle.

According to this structure, since it is made of aluminum alloy, it is difficult to change the material and shape compared to bamboo, wood, or resin, and durability can be improved. In addition, when knitting or repairing fishing nets, etc., it is possible to prevent an increase in friction with fishing nets, etc., and prevent catching, so that workability does not deteriorate. In addition, since it is made of aluminum alloy, it is softer and easier to process than stainless steel, and the processing cost can be reduced. In addition, since it is made of aluminum alloy, it is relatively lightweight and has excellent recyclability.

Further, since the yarn accommodation space is formed, the yarn wound around the yarn hooking main body plate portion is accommodated in the yarn accommodation space. For this reason, it is possible to enhance the grip during use.

Moreover, it is preferable that the height dimension of the first side plate portion and the second side plate portion decreases toward the tip.
According to such a configuration, the net hook can be easily passed through a net hole of a fishing net or the like.

The thread hooking body plate portion includes a body portion connected to the first side plate portion and the second side plate portion, and a thread hooking protrusion extending from the body portion toward the tip end side. , It is preferable that the plate thickness of the tip of the thread hooking protrusion is smaller than the plate thickness of the main body.
According to such a configuration, the thread can be easily wound around the net needle, so that workability can be improved.

Moreover, it is preferable that the radius of curvature of the corner portion is 0.3 mm or more.
With such a configuration, it is possible to further improve workability when knitting or repairing fishing nets or the like.

Further, the present invention is a method for manufacturing a net needle, wherein the net needle includes a first side plate portion and a second side plate portion which are arranged to face each other and whose tips are connected to each other; a yarn hooking body plate portion that is vertically connected to the side plate portion and the second side plate portion and on which a thread is wound; and a yarn accommodation space configured by the second side plate portion, and a pair of flanges, a web connecting the flanges, and a web formed on the web by processing an aluminum alloy extruded material having an H-shaped cross section. a first step of forming an intermediate member provided with a notch, a second step of welding the tips while bending the tips of the flanges so that they are close to each other, and the step of welding the tips after the second step and a third step of polishing the intermediate member by barrel polishing, wherein in the third step, the surface roughness of each portion is set to be Ra 1.0 or less, and the corners of each portion are curved. It is characterized by being set as follows.

According to such a configuration, since it is made of aluminum alloy, it is softer than stainless steel, making it easier to process, and the cost of processing can be reduced. In addition, in the barrel polishing of the third step, the surface roughness and the shaping of the corners can be performed in one step, and the manufacturing can be easily performed. Moreover, since it is made of aluminum alloy, it is difficult to change the material and shape compared to bamboo, wood, or resin, and durability can be improved. In addition, when knitting or repairing a fishing net or the like, it is possible to prevent an increase in friction with the fishing net or the like and to prevent catching, thereby improving workability. In addition, since it is made of aluminum alloy, it is relatively lightweight and has excellent recyclability.

Further, since the yarn accommodating space is formed, the yarn wound around the yarn hooking body plate portion is accommodated in the yarn accommodating space. For this reason, it is possible to enhance the grip during use.

Moreover, in the first step, it is preferable that the tips of the flanges are processed so that the height dimension decreases toward the tips.
According to such a configuration, since the height dimension of the first side plate portion and the second side plate portion becomes smaller toward the tip, the hook can be easily passed through the hole of the fishing net or the like.

Further, in the third step, it is preferable to set the radius of curvature of the corner portion to 0.3 mm or more.
With such a configuration, it is possible to further improve workability when knitting or repairing fishing nets or the like.

ADVANTAGE OF THE INVENTION According to this invention, durability can be improved, manufacture can be easily carried out, and the grip property at the time of use can be improved.

It is a perspective view of the net needle of this embodiment. It is a figure of the net needle of this embodiment, and (a) is a top view and (b) is a side view. It is a figure of the mesh needle of this embodiment, Comprising: (c) is a front view, (d) is a rear view. FIG. 2(a) is a sectional view taken along the line AA. FIG. 2B is a cross-sectional view taken along the line BB of FIG. 2(a); FIG. 2(a) is a cross-sectional view taken along the line CC. FIG. 3 is a cross-sectional view taken along the line DD of FIG. 2(a); It is a perspective view of an extruded material. It is a perspective view of a 1st intermediate member. It is a perspective view of a 2nd intermediate member.

[composition]
FIG. 1 is a perspective view of a mesh needle 1 of this embodiment. FIG. 2 is a diagram of the net needle 1 of the present embodiment, where (a) is a plan view and (b) is a side view. 3A and 3B are diagrams of the net needle 1 of the present embodiment, in which (c) is a front view and (d) is a rear view. FIG. 4 is a sectional view taken along the line AA of FIG. 2(a). FIG. 5 is a sectional view taken along line BB of FIG. 2(a). FIG. 6 is a sectional view taken along line CC of FIG. 2(a). FIG. 7 is a sectional view taken along line DD of FIG. 2(a).

A net needle 1 is a tool used for knitting or repairing a tamo net, a fishing net, or the like. The mesh needle 1 is made of an aluminum alloy and is integrally formed. The material (kind) of the aluminum alloy may be appropriately set in consideration of workability and manufacturing cost. The net needle 1 includes a first side plate portion 2 , a second side plate portion 3 , and a threading body plate portion 4 . The plate thicknesses of the first side plate portion 2, the second side plate portion 3, and the thread hooking body plate portion 4 may be the same or different, and each plate thickness is constant, and is 1 to 15 mm, preferably 2 to 5 mm. It may be appropriately set within a range according to the application.

The first side plate portion 2 and the second side plate portion 3 are parts that form the outer shape of the side portion of the net needle 1 . The first side plate portion 2 and the second side plate portion 3 are arranged to face each other while their tips are connected to each other. The first side plate portion 2 and the second side plate portion 3 are portions to be gripped when the net needle is used.

As shown in FIGS. 2(b) and 3(c), the height dimension of the first side plate portion 2 and the second side plate portion 3 gradually decreases toward the tip. That is, 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 . Thereby, the front surface 21 of the first side plate portion 2 can be divided into surfaces 211 and 212 . Surface 211 is flat. The surface 212 is the surface of the tip portion of the first side plate portion 2 , and is inclined more toward the center of the net needle 1 in the height direction than the surface 211 . Further, the back surface 22 of the first side plate portion 2 can be divided into back surfaces 221 and 222 . 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 net needle 1 in the height direction from the back surface 221 . Further, the front surface 31 of the second side plate portion 3 can be divided into surfaces 311 and 312 . Surface 311 is flat. The surface 312 is the surface of the tip portion of the second side plate portion 3 , and is inclined more toward the center of the net needle 1 in the height direction than the surface 311 . Further, the back surface 32 of the second side plate portion 3 can be divided into back surfaces 321 and 322 . Back surface 321 is flat. The back surface 322 is the back surface of the tip portion of the second side plate portion 3 , and is inclined more toward the center of the net needle 1 in the height direction than the back surface 321 .

The threading body plate portion 4 is a portion around which a thread (net thread) (not shown) is wound. The threading body plate portion 4 is vertically connected to the first side plate portion 2 and the second side plate portion 3 at approximately the center in the height direction of the first side plate portion 2 and the second side plate portion 3 . The threading body plate portion 4 includes a body portion 5 and a threading projection portion 6 . The body portion 5 is a portion connected to the first side plate portion 2 and the second side plate portion 3 . The thread hooking protrusion 6 is a portion for hooking one end of the thread wound around the body portion 5 .

As shown in FIGS. 1 and 6, the thickness of the tip of the thread hooking projection 6 (the dimension in the height direction of the net needle 1) is smaller than the thickness of the main body 5. As shown in FIGS. That is, the tip of the thread hooking protrusion 6 is tapered in the height direction of the net needle 1 . As a result, the front surface 61 of the thread hooking protrusion 6 can be divided into surfaces 611 and 612 . Surface 611 is flat. The surface 612 is the surface of the tip of the thread hooking projection 6, and is inclined more toward the center in the height direction of the net needle 1 than the surface 611 is. Further, the rear surface 62 of the thread hooking protrusion 6 can be divided into rear surfaces 621 and 622 . Back surface 621 is flat. The back surface 622 is the back surface of the tip of the thread hooking protrusion 6, and is inclined more toward the center in the height direction of the net needle 1 than the back surface 621 is.

2(b), 6 and 7, the plate thickness of the tip of the thread hooking protrusion 6 is greater than the height dimension of the tips of the first side plate 2 and the second side plate 3. is also smaller. Further, as shown in FIG. 7, the thread hooking projection 6 is positioned substantially at the center of the net needle 1 in the height direction.

The net needle 1 has thread accommodation spaces 7 and 7 formed by the thread hooking body plate portion 4 , the first side plate portion 2 and the second side plate portion 3 on the front and back sides of the thread hooking body plate portion 4 . The thread storage spaces 7 and 7 can store the thread wound around the thread hooking body plate portion 4 .

The net needle 1 also has a bobbin end portion 8 which is composed of the rear end of the threading body plate portion 4 , the rear end of the first side plate portion 2 , and the rear end of the second side plate portion 3 . The bobbin end portion 8 is a recess opening rearward at the rear end portion of the net needle 1 . The thread winding end portion 8 is a portion where the thread wound around the thread hooking body plate portion 4 is locked.

Further, the net needle 1 has a hole portion 9 surrounded by the tip end side of the threading body plate portion 4 and the first side plate portion 2 and the second side plate portion 3 . The hole 9 penetrates in the plate thickness direction. The thread hooking protrusion 6 extends toward the tip side of the net needle 1 at the widthwise center of the main body 5 and protrudes into the hole 9 in an elongated shape.

[Surface roughness]
The surface roughness (surface roughness) of each portion of the net needle 1 is Ra 1.0 or less. That is, the surface roughness of the front surface 21, the rear surface 22, the side surfaces 23 and 24, and the rear end surface 25 of the first side plate portion 2 is Ra 1.0 or less. Further, the surface roughness of the front surface 31, rear surface 32, side surfaces 33 and 34, and rear end surface 35 of the second side plate portion 3 is Ra 1.0 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 5 is Ra 1.0 or less. Furthermore, the surface roughness of the front surface 61, the rear surface 62, and the side surfaces 63, 64 of the thread hooking protrusion 6 is Ra 1.0 or less.

[Curved surface of corner]
The corners forming each portion of the mesh needle 1 are curved. More specifically, as shown in FIGS. 3(c), 3(d), 4, 5, and 7, the surface 21 (211, 212) of the first side plate portion 2 and the side surfaces 23, 24 Each formed corner is curved. Each corner formed by the rear surface 22 (221, 222) and the side surfaces 23, 24 of the first side plate portion 2 is curved. Further, each corner formed by the surface 31 (311, 312) of the second side plate portion 3 and the side surfaces 33, 34 is curved. Each corner formed by the rear surface 32 (321, 322) and the side surfaces 33, 34 of the second side plate portion 3 is curved.

Further, as shown in FIG. 2(a), each corner formed by the side surfaces 23, 24 and the rear end surface 25 of the first side plate portion 2 is curved. Further, each corner formed by the side surfaces 33, 34 and the rear end surface 35 of the second side plate portion 3 is curved.

Further, as shown in FIG. 2B, the corner portion formed by the front surface 311 and the rear end surface 35 of the second side plate portion 3 and the rear surface 321 formed by the rear surface 35 of the second side plate portion 3 The corners are curved. Similarly, the corner formed by the front surface 211 and the rear end surface 25 of the first side plate portion 2 and the corner formed by the rear surface 221 and the rear end surface 25 of the first side plate portion 2 are curved surfaces. .

As shown in FIGS. 1 and 2, the corners formed by the front side surfaces 53, 53 of the main body 5 and the side surfaces 63, 64 of the thread hooking projection 6 are curved. Further, the tip side surface 65 of the thread hooking protrusion 6 is curved. As described above, the corners of the first side plate portion 2, the second side plate portion 3, and the threading body plate portion 4 are curved.

In this embodiment, each of the corners (edges) described above has an arcuate shape when viewed in cross section, and has a radius of curvature of 0.3 mm or more. If the corners are less than 0.3 mm, the meshes are likely to come into contact with the mesh and break, and the corners are also likely to be worn. Each corner may be formed with a curved surface, and may be elliptical or quadratic when viewed in cross section.

[Production 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 a mesh needle according to the present embodiment, first to third steps are performed.

The first step is to form an intermediate member made of an aluminum alloy. In the first step, an extruded member 100 made of an aluminum alloy and having an H-shaped cross section as shown in FIG. 8 is prepared. Further, as shown in FIG. 9, in the first step, the extruded material 100 is cut to a predetermined length and pressed or cut to form notches 104 and 105 on the front and rear sides of the web 103 . Thereby, the 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, and the tips of the flanges 101 and 102 are tapered such that the height dimension decreases toward the tips. Moreover, 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 smaller than the plate thickness of the web 103. do. Thereby, the second intermediate member 120 as shown in FIG. 10 is formed.

A second step is a step of processing the second intermediate member 120 . In the second step, the ends of the flanges 101 and 102 are welded to each other while being bent so that the ends of the flanges 101 and 102 come closer to each other with respect to the second intermediate member 120 shown in FIG. As a result, a third intermediate member (not shown) having the same external shape as the mesh needle 1 shown in FIG. 1 is formed.

The third step is a step of polishing the third intermediate member by barrel polishing. In barrel polishing, polishing stone (media), workpiece (third intermediate member), compound (lubricant), water, etc. are charged into the barrel tank, and relative motion difference (friction) and free pressure contact are caused by external motion. This is a processing method in which the workpiece is polished by generating There are, for example, rotary, vibratory, centrifugal, and fluidized barrel polishing methods, and any method can be applied in this embodiment. In addition, the type of media and compound to be used, the usage time, etc. can be designed as appropriate.

That is, in the third step, the barrel polishing conditions are set so that the surface roughness of each portion of the net needle 1 is Ra 1.0 or less and the radius of curvature of each corner is 0.3 mm or more. The net needle 1 is completed by the above.

[how to use]
Next, how to use the net needle 1 will be described. First, while one end of the thread is hooked on the thread hooking projection 6, the thread is wound back and forth between the thread winding end 8 and the hole 9. As shown in FIG. As a result, the thread is wound many times in the longitudinal direction of the body portion 5 . Next, the thread of the body portion 5 is let out and alternately passed vertically through the warp threads or the adjacent mesh holes from the tip portions of the first side plate portion 2 and the second side plate portion 3 . As a result, fishing nets and the like can be knitted and repaired.

[Effect]
According to the mesh needle 1 according to the present embodiment described above, since it is made of an aluminum alloy, its material and shape are less likely to change compared to bamboo, wood, or resin, and durability can be enhanced. In addition, when knitting or repairing fishing nets, etc., it is possible to prevent an increase in friction with fishing nets, etc., and prevent catching, so that workability does not deteriorate. In addition, since it is made of aluminum alloy, it is softer and easier to process than stainless steel, and the processing cost can be reduced. In addition, since it is made of aluminum alloy, it is relatively lightweight and has excellent recyclability.

Further, since the yarn accommodation spaces 7, 7 are formed, the yarn wound around the yarn hooking body plate portion 4 is accommodated in the yarn accommodation spaces 7, 7. As shown in FIG. For this reason, the hand will grip the first side plate portion 2 and the second side plate portion 3 regardless of the increase or decrease in the amount of wound thread during use. As a result, regardless of the increase or decrease in the number of wound threads during use, the user can hold the thread with a constant feeling (tactile feel), so that the grip during use can be enhanced.

Further, in the present embodiment, the height dimension of the first side plate portion 2 and the second side plate portion 3 decreases toward the tip. According to such a configuration, the net needle 1 can be easily passed through a net hole of a fishing net or the like.

Further, in the present embodiment, the plate thickness of the end of the thread hooking protrusion 6 is smaller than the plate thickness of the main body portion 5 . According to such a configuration, the thread can be easily wound around the net needle 1, so that workability can be improved.

Further, in this embodiment, the radius of curvature of the corners of each part is 0.3 mm or more. With such a configuration, it is possible to further improve workability when knitting or repairing fishing nets or the like.

In addition, in the present embodiment, the net needle 1 having the above-described surface roughness and radius of curvature of the corners can be manufactured in a single process by barrel polishing. Thereby, the manufacturing cost can be reduced. In addition, burrs generated by pressing or cutting can be easily removed by barrel polishing.

In addition, in the first step of the present embodiment, the tips of the flanges 101 and 102 are processed so that the height dimension decreases toward the tips. According to such a configuration, since the height dimension of the first side plate portion 2 and the second side plate portion 3 decreases toward the tip, the net hook 1 can be easily passed through a net hole of a fishing net or the like.

Further, in the third step of the present embodiment, the radius of curvature of the corners of each portion of the mesh needle 1 is set to 0.3 mm or more. With such a configuration, it is possible to further improve workability when knitting or repairing fishing nets or the like.

[Modification]
(a): The surface roughness of each front surface, each rear surface, each side surface and each end surface may be Ra 1.0 or less.
(b): The corners forming each portion of the net needle 1 can be selectively curved. For example, each corner formed by the front surface 51 and the rear surface 52 of the body portion 5 and the front side surfaces 53, 53 can be curved. Further, each corner formed by the front surface 51 and the rear surface 52 of the main body portion 5 and the rear side surface 54 can be curved. Further, each corner formed by the surface 61 (611, 612) and the side surfaces 63, 64 of the thread hooking protrusion 6 can be curved. Further, each corner formed by the rear surface 62 (621, 622) and the side surfaces 63, 64 of the thread hooking protrusion 6 can be curved. Further, each corner formed by the front surface 612 and the back surface 622 of the thread hooking protrusion 6 and the tip side surface 65 can be curved.

(c): In addition, the constituent elements of the present invention can be changed as appropriate without departing from the gist of the present invention.

Reference Signs List 1 net needle 2 first side plate portion 3 second side plate portion 4 thread hooking body plate portion 5 main body portion 6 thread hooking projection portion 7 thread accommodation space 8 thread winding end portion 9 hole portion 21, 31, 51, 61, 211, 212 , 311, 312, 611, 612 Front surface 22, 32, 52, 62, 221, 222, 321, 322, 621, 622 Back surface 23, 24, 33, 34, 63, 64 Side surface 25, 35 Rear end face 53 Front side face 54 Rear side face 65 Tip side face 100 Extruded material 101, 102 Flange 103 Web 104, 105 Notch 106 Projection 110 First intermediate member 120 Second intermediate member

Claims (7)

a first side plate portion and a second side plate portion which are arranged facing each other and whose tips are connected to each other;
a thread hooking body plate portion that is vertically connected to the first side plate portion and the second side plate portion and on which a thread is wound;
a yarn accommodation space configured by the yarn hooking body plate portion, the first side plate portion, and the second side plate portion on the front and back of the yarn hooking body plate portion;
Integrally formed of aluminum alloy,
A mesh needle, characterized in that the surface roughness of each part is Ra 1.0 or less, and the corners forming each part are curved. 2. The net needle according to claim 1, wherein the first side plate portion and the second side plate portion have a height dimension that decreases toward the tip. The thread hooking body plate portion includes a body portion connected to the first side plate portion and the second side plate portion, and a thread hooking protrusion extending from the body portion toward the tip side,
3. The net needle according to claim 1, wherein the thickness of the tip of the thread hooking projection is smaller than the thickness of the main body. The net needle according to any one of claims 1 to 3, wherein the radius of curvature of the corner is 0.3 mm or more. A method for manufacturing a net needle,
The net needle is
a first side plate portion and a second side plate portion which are arranged facing each other and whose tips are connected to each other;
a thread hooking body plate portion that is vertically connected to the first side plate portion and the second side plate portion and on which a thread is wound;
a yarn accommodation space configured by the yarn hooking body plate portion, the first side plate portion, and the second side plate portion on the front and back of the yarn hooking body plate portion;
A first step of processing an aluminum alloy extruded 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 welding the tips while bending the tips of the flanges so that they are close to each other;
a third step of polishing the intermediate member after the second step by barrel polishing,
In the third step, the surface roughness of each part is set to Ra 1.0 or less, and the corners of each part are set to be curved surfaces. 6. The method of 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. The method of manufacturing a net needle according to claim 5, wherein in the third step, the radius of curvature of the corner is set to 0.3 mm or more.

Images