JP2012213384A - Lure for fishing and method for producing lure body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lure for fishing which is capable of changing the position of the center of gravity or the distribution of weight, without changing its shape or outer form, or without changing them widely, and also is capable of applying it to a thin thickness body such as a spoon for fishing, and also is capable of being produced simply.SOLUTION: This metal-made thin thickness spoon body 3 of the spoon for fishing 1 is formed so that it can be divided into a first partition 17 at a rear side and a second partition 19 at a front side based on the difference of molding materials. The first partition 17 of the spoon body 3 is molded from a tungsten alloy and the second partition 19 of the spoon body 3 is molded from a material having a lower specific gravity than that of the tungsten alloy.

Description

  The present invention relates to a fishing lure used for fishing, and more specifically to, for example, a solid type lure that does not have a cavity inside.

  A fishing lure is required to have various flight characteristics and swimming depending on how it is used. If you want to slightly change the swimming of a specific lure, for example, underwater, we have dealt with it by changing the shape of the lure, but changing the shape of the lure also changes the design and air resistance of the lure at the same time. Therefore, for example, it is difficult to determine a shape for obtaining a specific swim without deteriorating the design and without affecting the flight characteristics. That is, when changing the shape of the lure, all the characteristics such as design properties, running water resistance and swimming / movement, air resistance and flight distance were examined from the beginning, and the test had to be repeated. In addition, a change in the shape inevitably involves a change in the molding die.

  Therefore, a fishing lure having a lure body in which a tungsten alloy heavy member is covered with a lead or lead alloy covering has been developed (see, for example, Patent Document 1).

  With this type of fishing lure, the gravity center position of the fishing lure, which has a great influence on the lure characteristics, can be adjusted by changing the weight and position of the weight member made of tungsten alloy without changing the shape of the lure. it can. Therefore, since the design property, air resistance, and running water resistance of the lure can be maintained as they are, a fishing lure having a necessary function can be easily obtained.

JP 2004-73148 A

  However, in the fishing lure having such a configuration, the weight member must be formed in advance, and the lure body must be formed of lead or a lead alloy using the weight member as an insert. Absent. In addition, the fishing lure having such a configuration can be applied to a fishing lure having a thickness, but is applicable to a thin body such as a fishing spoon or a thin fishing jig. Can not.

  Therefore, the present invention can change the distribution of the center of gravity position or weight without changing the shape or the outer shape largely or without changing greatly, and is also applicable to a thin body such as a fishing spoon or a thin fishing jig. It is an object of the present invention to provide a fishing lure that is possible or easy and can be easily manufactured, and a method for manufacturing a lure body of such a fishing lure.

  In order to achieve this object, a fishing lure of the present invention comprises a luer body and a hook connected to the luer body, and the luer body has a line connection (for example, a line eye or a line hole). A fishing lure provided, wherein the luer body includes a first section (first region, first range or first portion) molded from a first material, and a second material. A second section (second region, second range or second portion) formed integrally and continuously with the first section, wherein the first material is the first section It has a specific gravity greater than the specific gravity of the second material. In the fishing lure of the present invention, the center of gravity can be moved to the first compartment side without changing or greatly changing the shape or outer shape of the lure body. Alternatively, a large weight can be distributed to the first compartment.

  Alternatively, a fishing lure according to the present invention includes a luer body and a hook connected to the lure body, and the luer body is provided with a line connecting portion (for example, a line eye or a line hole). The luer main body has one end side molded with a first material and the other end side or an intermediate part formed integrally with the one end side continuously with a second material. The first material has a specific gravity greater than that of the second material. One end of the lure body may be one end in the length direction, and the other end or the middle may be the other end in the length or the middle in the length. Or the one end part side of a lure main body may be a width direction one end part side, and the other end part side or an intermediate part may be a width direction other end part side or a width direction intermediate part. Here, the lure main body is formed of one end portion formed of the first material, an intermediate portion integrally formed continuously with the one end portion of the second material, and the intermediate portion of the first material. And the other end side continuously and integrally formed. Alternatively, a fishing lure according to the present invention includes a luer body and a hook connected to the lure body, and the luer body is provided with a line connecting portion (for example, a line eye or a line hole). A lure body, wherein the luer main body is formed of an intermediate portion formed of a first material, and one end side and the other end side formed integrally with the intermediate portion of a second material; The first material may have a specific gravity greater than that of the second material.

  The first material is preferably a tungsten alloy having a large specific gravity. The second material can be powdered and sintered, and more specifically, for example, a tungsten alloy having a specific gravity lower than that of the first material. The specific gravity of the first material is desirably 13.0 or more and 19.2 or less. When the specific gravity of the first material is less than 13.0, the luer body becomes too light, and when the specific gravity of the first material exceeds 19.2, the luer body becomes too heavy, If the specific gravity exceeds 15.0, the lure body becomes too heavy. If the specific gravity difference between the first material and the second material is less than 3.0, the position of the center of gravity or the weight distribution cannot be changed greatly.

  By the way, for example, the first material and the second material are integrally sintered at the same sintering temperature. There is no problem if the sintering temperature for the first material and the sintering temperature for the second material are the same or not significantly different, but for the first material There may be inconveniences when the sintering temperature and the sintering temperature for the second material differ greatly. For example, the first material is a high specific gravity tungsten alloy having a high tungsten content ratio (for example, about 95% by weight), and the second material is a low specific gravity tungsten having a low tungsten content ratio (for example, about 70% by weight). In the case of an alloy, the sintering temperature for the first material is much higher than the sintering temperature for the second material. Here, if the first material and the second material are integrally sintered at the sintering temperature for the first material, the sintering temperature is too high for the second material. There is a risk of ejection from the phased part. Conversely, if the first material and the second material are integrally sintered at the sintering temperature for the second material, the sintering temperature is too low for the first material, so the first material is sintered. May not complete. If the sintering of the first material is not completed, the shrinkage of the first material is insufficient, the integration with the second material is hindered, and the specific gravity and strength of the first section are sufficiently large. It will not be. Therefore, when the sintering temperature for the first material and the sintering temperature for the second material are greatly different, the activity adjustment for adjusting the activity of the first material and / or the second material is performed. It is necessary to perform processing. If the activity of the first material is improved by the activity adjustment process, the sintering temperature for the first material is lowered, and if the activity of the second material is reduced, the activity for the second material is reduced. The sintering temperature is increased. For example, if an activity adjustment process (activity adjustment process by component adjustment) that improves the activity of the first material by adding a component having a low melting point to the first material, sintering for the first material is performed. The temperature is lowered. Moreover, if the activity adjustment process (activity adjustment process by component adjustment) which adds the component with high melting | fusing point to 2nd material and reduces the activity of 2nd material is performed, sintering for 2nd material The temperature rises. Alternatively, the powdering of the first material is performed using a ball mill, and the activity adjustment process (activity adjustment process by adjusting the manufacturing method) is performed to reduce the particle size and improve the activity of the first material. The sintering temperature for the first material can be lowered.

  The lure body manufacturing method of the present invention is a method for manufacturing a lure body used for a fishing lure, wherein the lure body has a first section (first region, first range or first portion). ) And a second section (second region, second range, or second portion) of the luer body that is continuous with the first section. A preparation step for preparing each of the second materials, a molding step for filling the first lure body with the first material and the second material at the same time or almost simultaneously, and molding, And a sintering step for sintering the formed material. Here, the lure body is made of metal or ceramics, for example. The mold used here may be for molding the final shape of the luer body, or is subjected to secondary processing (for example, die cutting or pressing) to obtain the final shape of the lure body. It may be for molding the material for. The first material for forming the first compartment can have a higher specific gravity than the second material for forming the second compartment.

  Since the structure of the fishing lure of the present invention can easily adjust the weight distribution, it can easily secure various functions required. Moreover, if the manufacturing method of the lure main body of this invention is used, the lure main body which adjusted important distribution can be manufactured easily.

1 is a front view of a fishing spoon according to the present invention. It is sectional drawing of a spoon main body. It is a front view at the time of connecting the hook of a fishing spoon to the other side. It is a figure which shows the manufacturing process of a spoon main body, and is a figure of a kneading | mixing process. It is a figure which shows the manufacturing process of a spoon main body, and is a figure of a formation process. It is a figure which shows the manufacturing process of a spoon main body, and is a figure of a sintering process. 1 is a front view of a fishing jig according to the present invention. It is sectional drawing of a jig main body. It is a front view at the time of connecting the hook of a fishing jig to the opposite side. It is a figure for demonstrating the manufacturing process of a jig main body. It is a figure which shows the example of a change of a fishing jig. It is a front view of another fishing jig which concerns on this invention. It is a figure for demonstrating the manufacturing process of another jig main body, and is a figure of a formation process. It is a figure for demonstrating the manufacturing process of another jig main body, and is a figure of a combination process. It is a figure which shows the example of a change of the linear body for a connection. It is a front view of the other fishing jig which concerns on this invention. It is a side view of a jig main body. It is a figure for demonstrating the manufacturing process of another jig main body. It is a figure which shows the example of a change of the linear body for a connection.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a fishing spoon according to the present invention, FIG. 2 is a sectional view of a spoon body, and FIG. 3 is a front view when a hook of a fishing spoon is connected to the opposite side.

  The fishing spoon 1 includes a thin metal spoon body (luer body) 3, an eye 7 attached to a mounting hole 5 formed at the tip of the spoon body 3, and a rear end of the spoon body 3. And an eye 11 attached to an attachment hole 9 formed in the metal. A hook 13 made of metal is connected to the eye 11, and the fishing spoon 1 is a line drawn from the fishing rod to the eye 7. 15 is connected and used. Although the spoon main body 3 is formed in the front-back (length direction) symmetrical shape, based on the difference in a molding material, the 1st division (1st area | region, 1st range, or 1st part) of the rear side 17 (fine dot portion) and the front second section (second region, second range or second portion) 19 (coarse point portion) The first compartment 17 is formed from a tungsten alloy (first material), and the second compartment 19 of the spoon body 3 is formed from a material (second material) having a specific gravity smaller than that of the tungsten alloy. The spoon body 3 of the fishing spoon 1 is lighter on the front side (line side) and heavier on the rear side (hook side). Since the distance to the center of gravity of the spoon 1 is long, it is suitable for flying further away, and the hook is difficult to get tangled in the line underwater. The specific gravity of the tungsten alloy of the first material used here is 13.0 or more and 19.2 or less, the specific gravity of the second material is 15.0 or less, and the specific gravity of the first material and the second material is The difference is 3.0 or more. The second material can be, for example, a tungsten alloy having a content such as nickel different from that of the first material.

  Here, when it is necessary to move the fishing lure such as jumping in water or when it is desired to prevent rooting, a hook 13 is connected to the eye 7 and a line 15 is connected to the eye 11 as shown in FIG. It can be connected so that the front side of the spoon body 3 is heavy and the rear side is light.

  4 to 6 are views showing a manufacturing process of the spoon main body 3.

  First, the produced tungsten alloy powder (first material) 21 and the thermoplastic binder 23 containing a lubricant are put into a kneader A and kneaded to produce a material 25 for the first compartment 17 on the rear side. To do. Further, for example, a tungsten alloy powder (second material) 27 manufactured so that the type of metal contained in the kneader B is different from that of the first material and a thermoplastic binder 23 containing a lubricant are kneaded, A material 29 for the front second compartment 19 is produced (see FIG. 4).

  Next, using the manufactured material 25 for the rear first section 17 and the material 29 for the front second section 19, the press device 35 (FIG. 5 a) including the die 31 and the punch 33 is used. Use to mold the spoon body 3. First, the material 25 for the first section 17 is placed in the portion of the die cavity 37 where the first section 17 is to be molded, and the second section 19 of the die cavity 37 is molded simultaneously or substantially simultaneously. The material 29 for the second compartment 19 is introduced into the part to be done (FIG. 5b). Once the material 25 for the first compartment 17 and the material 29 for the second compartment 19 have been placed in the die cavity 37, the punch 33 is lowered and the material and second material for the first compartment 17 are lowered. The material for the compartment 19 is pressurized to form the shaped body of the spoon body 3 (FIG. 5c).

  Thereafter, the thermoplastic binder 23 is removed from the molded body of the spoon body 3 by heating and degreasing, and sintering is performed (FIG. 6). If necessary, an edge portion by barrel polishing is performed on the molded body of the spoon body 3. The spoon body 3 is manufactured by removing the burrs and finishing the surface gloss. Then, the eye 7 is attached to the attachment hole 5 of the spoon body 3, and the eye 11 is attached to the attachment hole 9. The attachment holes 5 and 9 of the spoon body 3 may be formed after sintering or may be formed at the time of molding.

  In the case where the first material 21 and the second material 27 are put into the die cavity 37 without using the thermoplastic binder 23 and the spoon body 3 is formed, the kneading step in FIG. 4 or the heat degreasing in FIG. The process is omitted.

  More specifically, the first material 21 contains 95% by weight of tungsten and has a large specific gravity. However, since the first material 21 contains 3 to 5% by weight of copper having a low melting point, the sintering temperature is low. The second material 27 contains 70% by weight of tungsten and has a small specific gravity, but contains 12 to 18% by weight of iron having a high melting point, so the sintering temperature is high. As another additive metal, nickel for enhancing the rust prevention property or cobalt having a high melting point (particularly for the second material 27) for increasing the sintering temperature can be used.

  7 is a front view of a fishing jig according to the present invention, FIG. 8 is a cross-sectional view of the jig body, and FIG. 9 is a front view when a hook of the fishing jig is connected to the opposite side.

  The fishing jig 39 includes a metal jig body (a lure body) 41 imitating a small fish, an eye 43 attached to the tip of the jig body 41, and an eye attached to the rear end of the jig body 41. 45. The metal hook 13 is connected to the eye 45, and this fishing jig 39 is used by connecting the line 15 drawn from the fishing rod to the eye 43. The jig body 41 is formed in a symmetrical shape in the front-rear direction (length direction), but based on the difference in the molding material, the rear first section (first region, first range, or first portion). 47 (fine point portion) and the front second section (second region, second range or second portion) 49 (rough point portion) can be divided into The first section 47 is formed from a tungsten alloy (first material), and the second section 49 of the jig body 41 is formed from a material (second material) having a specific gravity smaller than that of the tungsten alloy. The jig body 41 of the fishing jig 39 has a light front side (line side) and a heavy rear side (hook side), so fishing from the tip of the line compared to a jig body of the same shape, which is entirely made of the same material. Since the distance to the center of gravity of the jig 39 is long, it is suitable for flying further away, and the hook is less likely to get tangled in the line underwater. The specific gravity of the tungsten alloy of the first material used here is 13.0 or more and 19.2 or less, the specific gravity of the second material is 15.0 or less, and the specific gravity of the first material and the second material is The difference is 3.0 or more. The second material can be, for example, a tungsten alloy having a content such as nickel different from that of the first material.

  Here, when it is necessary to move the fishing lure such as jumping in water or when it is desired to prevent rooting, the hook 13 is connected to the eye 43 and the line 15 is connected to the eye 45 as shown in FIG. It is also possible to connect the jig body 41 so that the front side is heavy and the rear side is light. Moreover, the assist hook 13-1 can be connected to the eye opposite to the eye to which the hook 13 is connected. Alternatively, only the assist hook 13-1 can be used without using the hook 13.

  FIG. 10 is a diagram for explaining a manufacturing process of the jig body 41.

  In order to manufacture the jig main body 41, first, the manufactured tungsten alloy powder (first material) and a thermoplastic binder containing a lubricant are kneaded to manufacture a material for the first compartment 47 on the rear side. . Further, for example, a tungsten alloy powder (second material) manufactured so as to have a different type of metal from the first material and a thermoplastic binder containing a lubricant are kneaded, so that the second section 49 on the front side. Producing materials. The kneading step is performed as shown in FIG.

  Next, using the manufactured material 51 for the rear first section 47 and the material 53 for the front second section 49, the press device 59 (FIG. 10 a) including the die 55 and the punch 57 is used. Use to mold the jig body 41. First, the material 51 for the first section 47 is put into the part of the die cavity 61 where the first section 47 is to be molded, and the second section 49 of the die cavity 61 is molded simultaneously or substantially simultaneously. The material 53 for the second compartment 49 is put into the part to be made (FIG. 10b). Once the material 51 for the first compartment 47 and the material 53 for the second compartment 49 have been placed in the die cavity 61, the punch 57 is lowered and the material 51 and second material for the first compartment 47 are lowered. The molded body of the jig main body 41 is formed by pressurizing the material 53 for the section 49 (FIG. 10c).

  Thereafter, the thermoplastic binder is removed from the molded body of the jig main body 41 by heating and degreasing, and sintering is performed. If necessary, the edge of the molded body of the jig main body 41 is deburred by barrel polishing and the surface is removed. Gloss finish. Heat degreasing and sintering of the molded body of the jig body 41 are performed as shown in FIG. And the jig main body 41 is manufactured by forming the attachment holes 63 and 65 (refer FIG. 8) in the both ends of the jig main body 41. As shown in FIG. The eye 43 is attached by being inserted into the attachment hole 63, and the eye 45 is attached by being inserted into the attachment hole 65.

  When the jig body 41 is formed by putting the first material and the second material into the die cavity 61 without using the thermoplastic binder, the kneading step and the heat degreasing step are omitted.

  Moreover, as shown in FIG. 11, the jig main body 41 of the fishing jig 39 is divided into a central first section 67 (parts with fine dots) and a front second section 69 (coarse) based on the difference in molding material. You may form so that it can divide into the 3rd part 71 (part of a rough point) of the rear side, and the 3rd part 71 of a back side. That is, the first section 67 of the jig body 41 is formed from a tungsten alloy (first material), and the second section 69 and the third section 71 of the jig body 41 are smaller in specific gravity than the tungsten alloy. It can be formed of a material (second material). The second section 69 and the third section 71 of the jig body 41 are formed of the same material (second material). In such a configuration of the jig body 41, the front and rear are light and the center is heavy. Therefore, the fishing jig 39 is difficult to rotate in water, and it is easy to maintain a stable posture. Alternatively, the jig body 41 here may be divided into a first section 67 and second sections 69 and 71. The assist hook 13-1 may be connected to the eye 43. Alternatively, only the assist hook 13-1 may be used without using the hook 13.

Here, the first material contains 95% by weight of tungsten and has a large specific gravity. However, since the first material contains 3 to 5% by weight of copper having a low melting point, the sintering temperature is low. The second material has a small specific gravity containing 70% by weight of tungsten, but contains 12 to 18% by weight of iron having a high melting point, so that the sintering temperature is high. As another additive metal, nickel for enhancing the rust prevention property or cobalt having a high melting point (particularly for the second material) for increasing the sintering temperature can be used.
The configuration of the fishing jig 39 can be applied to, for example, a metal vibration lure.

  FIG. 12 is a front view of another fishing jig according to the present invention.

  Another fishing jig 73 includes a metal jig main body (luer main body) 75 that imitates a small fish, and a metal connecting linear body that is disposed in a mounting hole 77 that penetrates the jig main body 75 forward and backward. (Wire) 79, an eye 81 formed at the front end of the connecting linear body 79 so as to protrude from the front end of the jig main body 75, and a rear end of the jig main body 75 at the rear end of the connecting linear body 79 And an eye 83 formed so as to protrude from the metal hook 13. The fishing hook 73 is connected to the eye 81 with the line 15 drawn from the fishing rod. It is what you use. The jig body 75 is formed in a symmetric shape in the front-rear direction (length direction), but based on the difference in molding material, the rear first section 85 (parts of fine points) and the front second section 87 ( The first section 85 of the jig body 75 is formed from a tungsten alloy (first material), and the second section 87 of the jig body 75 is formed of this tungsten alloy. It is formed of a material having a smaller specific gravity (second material). The fishing jig 73 is suitable for flying further away, and the hook is less likely to get tangled with the line underwater. The specific gravity of the tungsten alloy of the first material used here is 13.0 or more and 19.2 or less, the specific gravity of the second material is 15.0 or less, and the specific gravity of the first material and the second material is The difference is 3.0 or more. The second material can be, for example, a tungsten alloy having a content such as nickel different from that of the first material. When the fishing lure needs to jump and jump underwater, or when it is desired to prevent rooting, the hook 13 can be connected to the eye 81 and the line 15 can be connected to the eye 83. The assist hook 13-1 may be connected to the eye 81. Alternatively, only the assist hook 13-1 may be used without using the hook 13.

  13 and 14 are diagrams for explaining a manufacturing process of the jig main body 75.

  In order to manufacture the jig main body 75, first, the manufactured tungsten alloy powder (first material) and a thermoplastic binder containing a lubricant are kneaded to manufacture a material for the first section 85 on the rear side. . Further, for example, a tungsten alloy powder (second material) manufactured so as to have a different type of metal from the first material and a thermoplastic binder containing a lubricant are kneaded, so that the second section 87 on the front side is used. Producing materials. The kneading step is performed as shown in FIG.

  Next, using the manufactured material 51 for the rear first section 85 and the material 53 for the front second section 87, a press device 93 (FIG. 13a) having a die 89 and a punch 91 is prepared. Use to mold a half of the jig body 75. First, the material 51 for the first section 85 is placed in the part of the die cavity 95 where the first section 85 of the half body is to be molded, and at the same time or substantially the same, the half body of the die cavity 95 is split. The material 53 for the second compartment 87 is inserted into the portion for molding the second compartment 87 (FIG. 13b). Once the material 51 for the first compartment 85 and the material 53 for the second compartment 87 are placed in the die cavity 95, the punch 91 is lowered and the materials 51 and 2 for the first compartment 85 are lowered. The material 53 for the section 87 is pressed to form a half body of the jig body 75 (FIG. 13c).

  Thereafter, the thermoplastic binder is removed from the half-shaped molded body of the jig body 75 by heat degreasing, and sintering is performed, and if necessary, barrel-polishing is performed on the half-shaped molded body of the jig main body 75. Removes burrs from edges and glossy surfaces. Heat degreasing and sintering of the half-shaped molded body of the jig body 75 are performed as shown in FIG.

  Then, the connecting linear member 79 is disposed in the mounting hole forming groove 99 of the molded half member 97, and another half member 97 is bonded to the half member 97 (for example, diffusion bonding or brazing). The jig body 75 is manufactured (FIG. 14). Further, in order to prevent the connecting linear body 79 from rotating or coming off, a bent portion or a U-shaped portion 82 is formed in the connecting linear body 79, and the corresponding bent portion or the U-shaped portion 82 is bent. A location or a U-shaped location 84 may be formed in the mounting hole forming groove 99 (FIG. 14-1).

  When the first material and the second material are put into the die cavity 95 without using the thermoplastic binder, and the half body of the jig body 75 is formed, the kneading step and the heat degreasing step are omitted. .

  More specifically, the first material contains 95% by weight of tungsten and has a large specific gravity, but contains 3 to 5% by weight of copper having a low melting point, so the sintering temperature is low. The second material has a small specific gravity containing 70% by weight of tungsten, but contains 12 to 18% by weight of iron having a high melting point, so that the sintering temperature is high. As another additive metal, nickel for enhancing the rust prevention property or cobalt having a high melting point (particularly for the second material) for increasing the sintering temperature can be used.

  FIG. 15 is a front view of another fishing jig according to the present invention, and FIG. 16 is a side view of the jig body.

  The other fishing jigs 100 are formed in the same shape as the fishing jig 73, and are made of a metal jig body (luer body) 101 that imitates a small fish, and in a mounting hole 103 that penetrates the jig body 101 back and forth. A metal connecting wire (wire) 105 disposed on the eye, an eye 107 formed at the tip of the connecting wire 105 so as to protrude from the tip of the jig body 101, and a connecting wire. An eye 108 formed so as to protrude from the rear end of the jig body 101 is provided at the rear end of 105, and a metal hook 13 is connected to the eye 108. This fishing jig 100 is used by connecting a line 15 drawn from a fishing rod to an eye 107. The jig body 101 is formed in a symmetrical shape in the thickness direction, but based on the difference in molding material, the upper first section 109 (the fine dot portion) and the lower second section 111 (the rough point). The first section 109 of the jig body 101 is formed from a tungsten alloy (first material), and the second section 111 of the jig body 101 has a specific gravity higher than that of the tungsten alloy. The small material (second material). The specific gravity of the tungsten alloy of the first material used here is 13.0 or more and 19.2 or less, the specific gravity of the second material is 15.0 or less, and the specific gravity of the first material and the second material is The difference is 3.0 or more. The second material can be, for example, a tungsten alloy having a content such as nickel different from that of the first material.

  FIG. 17 is a diagram for explaining a manufacturing process of the jig body 101.

  In order to manufacture the jig main body 101, first, the manufactured tungsten alloy powder (first material) and a thermoplastic binder containing a lubricant are kneaded, and a material for the upper first section 109 is manufactured. Further, for example, a tungsten alloy powder (second material) manufactured so as to have a different type of metal from the first material and a thermoplastic binder containing a lubricant are kneaded, and the lower second section 111 To produce materials for. The kneading step is performed as shown in FIG.

  The halved body of the jig body 101 is formed from the manufactured first material using a press device (see FIG. 13a) provided with a die and a punch. Moreover, the half body of the jig main body 101 is shape | molded using the press apparatus (refer FIG. 13a) provided with die | dye and a punch with the manufactured 2nd material.

  Then, the thermoplastic binder is removed from the half-shaped molded body of the jig body 101 by heat degreasing, and sintering is performed. If necessary, the molded body of the half-shaped body of the jig main body 101 is barrel-polished. Deburring the edge and glossing the surface. Heat degreasing and sintering of the half-shaped molded body of the jig body 101 are performed as shown in FIG.

  Then, the connecting linear body 105 is disposed in the mounting hole forming groove 115 of the molded half body 113, and another half body 117 is bonded to the half body 113 (for example, diffusion bonding or brazing). The jig body 101 is manufactured. Further, in order to prevent the connecting linear body 105 from rotating or coming off, a bent portion or U-shaped portion 119 is formed in the connecting linear body 105, and the bent portion corresponding to the bent portion or U-shaped portion 119 is formed. A location or U-shaped location 121 may be formed in the mounting hole forming groove 115 (FIG. 17-1).

  In addition, when shape | molding the half body of the jig main body 101 with a 1st material and a 2nd material without using a thermoplastic binder, a kneading | mixing process and a heating degreasing process are abbreviate | omitted.

  More specifically, the first material contains 95% by weight of tungsten and has a large specific gravity, but contains 3 to 5% by weight of copper having a low melting point, so the sintering temperature is low. The second material has a small specific gravity containing 70% by weight of tungsten, but contains 12 to 18% by weight of iron having a high melting point, so that the sintering temperature is high. As another additive metal, nickel for enhancing the rust prevention property or cobalt having a high melting point (particularly for the second material) for increasing the sintering temperature can be used.

  The fishing lure of the present invention can be manufactured using powder metallurgy.

1 Fishing spoon (fishing lure)
3 Spoon body (Lure body)
7, 43, 81, 107 Eye (Line Eye)
13 Hook 13-1 Assist hook 17, 47, 67, 85, 109 First section 19, 49, 69, 71, 87, 111 Second section 21 Tungsten alloy powder (first material)
27 Tungsten alloy powder (second material)
39, 73, 99, 100 Fishing jig (fishing lure)
41, 75, 101 Jig body (Lure body)

Claims (9)

A lure body and a hook connected to the lure body, and the lure body is a fishing lure provided with a line eye or a line hole,
The luer body comprises a first compartment molded from a first material and a second compartment molded integrally with the first compartment from a second material,
The fishing lure according to claim 1, wherein the first material has a specific gravity greater than that of the second material. A lure body and a hook connected to the lure body, and the lure body is a fishing lure provided with a line eye or a line hole,
The luer body includes one end side molded with a first material and the other end side or an intermediate part integrally molded continuously with the one end side with a second material,
The fishing lure according to claim 1, wherein the first material has a specific gravity greater than that of the second material. A lure body and a hook connected to the lure body, and the lure body is a fishing lure provided with a line eye or a line hole,
The luer main body includes an intermediate portion formed of a first material, and one end side and the other end side formed integrally with the intermediate portion continuously with a second material,
The fishing lure according to claim 1, wherein the first material has a specific gravity greater than that of the second material.   The fishing lure according to claim 1, 2 or 3, wherein the first material having a large specific gravity is a tungsten alloy.   The fishing lure according to claim 1, 2, 3, or 4, wherein the second section is formed by sintering the powdery second material having a small specific gravity.   The specific gravity of the first material is 13.0 or more and 19.2 or less, the specific gravity of the second material is 15.0 or less, and the specific gravity difference between the first material and the second material is 3. The fishing lure according to claim 1, wherein the fishing lure is 0 or more. A method for manufacturing a lure body used for fishing lures,
A first material for forming a first section of the luer body and a second material for forming a second section of the luer body that is continuous with the first section are prepared. A preparation process to
A molding step in which the first material and the second material are simultaneously or substantially simultaneously placed in a molding die of the luer body; and
A method for producing a lure body, comprising: a sintering step of sintering the formed material.   The lure body according to claim 7, wherein the first material for forming the first section has a specific gravity greater than that of the second material for forming the second section. Manufacturing method.   9. The preparation step includes performing an activity adjustment process for improving the activity of the first material and / or an activity adjustment process for reducing the activity of the second material. Of manufacturing lure body.

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