JPH09129A - Sinker for fishing - Google Patents

Abstract

PURPOSE: To provide a sinker for fishing capable of integrating a sinking body and an adjusting sinker by means of magnetic absorption, free from the loss of parts as expendable articles and easy in weight adjustment. CONSTITUTION: A sinking body 2 is engaged with a cylindrical body 1 having a longitudinal through hole 11 for threading a fishing line W at the center and they are fixed with an adhesive, and into an opening 32 of an adjusting sinker 3 having a slit groove 31 is inserted the cylindrical body 1. Either of the sinking body 2 or the adjusting sinker 3 is made of a magnetic material and the other is made of a ferromagnetic material or a magnetic material. Thus, the sinking body 2 and the adjusting sinker 3 are integrated by magnetic absorption, and the adjusting sinker 3 is free from troubles of slipping off. By selecting an adjusting sinker having a different height H and outer diameter D, the weight of a fishing sinker A can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow type fishing weight attached to a fishing line.

[0002]

2. Description of the Related Art In the case of using a mid-weight type fishing weight for fishing, when the weight has to be replaced depending on the situation, it is a conventional general method to cut the thread and replace it. . Therefore, in order to eliminate such inconvenience, a thing that can be exchanged without cutting the thread has been developed in recent years. For sea use, a spherical weight 6 as shown in Fig. 6 and for ponds, Winding weights such as 7 have become popular. The sphere weight 6 is provided with a split groove 61 that is open in the radial direction and a widening hole 62 that is widened in the center thereof. Using the split groove 62, the fishing line W is passed through the expanded hole 62 of the spherical weight 6 into the rubber taper shaft 7 that has been previously inserted into the fishing line, and the rubber taper shaft 7 is inserted into the expanded hole 62. The method of locking is adopted. In the case of the winding weight, a thin strip-shaped plate weight 9 is cut into an appropriate length on the winding shaft 8 inserted into the fishing line W and the winding weight is fixed.

[0003]

However, in order to insert and stop the taper shaft 7 made of a rubber material, the spherical weight 6 may come off and fall off at the time of transfer. On the other hand, with the winding weight, skill was required for winding and fixing. Further, to reduce the weight amount, the wound plate weight 9 may be cut off, but to increase the weight amount in the reverse case,
There was a limit to the minimum unit that could be wound, and it was impossible to finely adjust the weight. It is important to secure the delicate floating of rods, which is a typical fishing technique for pond fishing, and it was very difficult to adjust the setting of the weight for the plate weight 9 where it is difficult to add the weight. If the weight adjustment fails or the fishing ground situation changes, and the gimmick is changed, the plate weight portion wound around the winding shaft 8 is destined to be stripped and discarded. That is, the entire lead-based plate weight was a consumable item.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fishing weight whose weight can be adjusted very easily without fear of falling off, and without any portion that disappears as a consumable item. .

[0005]

In order to achieve the above object, the gist of the first invention is that one of a weight having a longitudinal hole and an adjustment weight having a split groove is a magnet and the other is a ferromagnetic material. Alternatively, the fishing weight is characterized in that it is composed of a magnet and both are integrated by magnetic attraction. Where "ferromagnet"
Is an object that is attracted to a magnet, and is iron, nickel, cobalt, or an alloy containing these metals.

The fishing weight of the second aspect of the present invention comprises a cylindrical rod having a longitudinal hole, a weight body made of a ferromagnetic material or a magnet and fixed to the lower peripheral surface of the cylindrical rod, and the cylindrical rod at the center. An adjusting weight that has an opening that can be inserted into and has a split groove that extends from the outer periphery to the opening and that is substantially C-shaped in plan view and that is held by the weight body by magnetic attraction. Is characterized by. Here, when the weight body is a ferromagnetic body, the adjusting weight becomes a magnet, and when the weight body is a magnet, the adjusting weight becomes a ferromagnetic body or a magnet. The fishing weight of the third aspect of the present invention has a weight body made of a ferromagnetic material or a magnet, having a small diameter portion and a large diameter portion and having a vertical through hole, and an opening at the center that can be inserted into the small diameter portion. An adjustment weight, which is substantially C-shaped in plan view and has a split groove extending from the outer circumference to the opening, is held by the weight body by magnetic attraction. The fishing weight of the fourth invention is characterized in that the weight body of the second invention or the third invention is composed of a neodymium magnet or a samarium cobalt magnet. here,
“Neodymium magnet” includes neodymium plastic magnet.

[0007]

According to the fishing weight of the first aspect of the present invention, the weight and the adjustment weight can be integrated by attracting the magnetic force, which facilitates mounting.
Further, if adjusting weights having different weights are prepared, it becomes extremely easy to adjust the weights. In the fishing weight of the second invention, when the opening of the adjustment weight is fitted into the cylinder rod, the adjustment weight is attracted and integrated by magnetic attraction, so that the weight can be adjusted with one touch. According to the magnetic attraction, although the attraction force of the magnetic force is strong in the pulling direction of each other and it is difficult to separate them, there is a drawback that they are slippery in the lateral shift direction (shear direction), but since the cylindrical rod is inserted into the opening. The drawbacks are eliminated. Further, in the fishing weight of the third invention, in addition to the same operation as the second invention, the small diameter portion which is inserted into the opening is integrally formed as a component portion of the weight body, so that the number of parts is reduced. If the weight bodies according to the second and third inventions like the fourth invention are made of neodymium magnets or samarium-cobalt magnets, the magnetic flux density is much higher than that of conventional ferrite magnets, so even if they are thrown strongly or handled roughly. However, there is no concern that the adjustment weight will fall out. Moreover, since the neodymium magnet and the samarium cobalt magnet are difficult to demagnetize, they withstand long-term use.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments. (1) Example 1 FIGS. 1 and 2 show an example of a fishing weight according to the present invention. FIG. 1 is a perspective view showing an attachment mode of a fishing weight to a fishing line, and FIG. 2 is a vertical sectional view showing a state in which the adjustment weight of FIG. 1 is magnetically attracted to a weight body.

The fishing weight includes a cylindrical rod 1, a weight body 2 and an adjusting weight 3.
Consists of The cylindrical rod 1 has a vertical through hole 11 through which the fishing line W passes.
With the tubular body provided with, the base portion 12, the support portion 13, the introduction portion 14 and the outer diameter thereof are sequentially reduced. The outer diameter of the base 12 is the weight 2
The inner diameter of the weight body 2 is made larger than the inner diameter of the weight body 2, and the fitted weight body 2 is stopped at the base portion 12 so that the weight body 2 can be easily adhered and fixed to the cylindrical rod 1. Support part 1
The outer diameter of 3 corresponds to the inner diameter of the weight body 2, so that the weight body 2 can be inserted into the cylindrical rod 1. The introduction portion 14 has a smaller outer diameter so that the weight 2 and the adjustment weight 3 can be easily inserted. Further, the leading end of the introduction portion 14 is chamfered so that the weight body 2 and the adjustment weight 3 can be easily fitted. The material of the cylindrical rod 1 is only required to maintain a predetermined mechanical strength, and a brass product is used in this embodiment.

The weight 2 is a cylindrical body made of a magnet, and its inner diameter is made substantially equal to that of the supporting portion 13 of the cylindrical rod 1. Weight 2
Is inserted into the cylindrical rod 1 and is received by the base portion 12, and is fixed to the outer peripheral surface of the lower portion of the cylindrical rod 1 with an adhesive. Here, the magnet constituting the weight 2 is a permanent magnet, and an alnico magnet, a ferrite magnet, a manganese / aluminum magnet, a rare earth magnet, a rare earth iron magnet, or the like is used. The weight body 2 has a function of adsorbing and holding the adjustment weight 3 by means of a suction surface 2a having a flat upper surface. The magnet used for the weight body 2 is the adjustment weight 3
In order to prevent falling off, it is preferable that the magnetic attraction force is large. Specifically, a magnet having a large residual magnetic flux density (Br), coercive force (Hc), and maximum energy product (BHmax) is preferable, and a rare earth cobalt magnet such as SmCo ₂ , Sm ₂ Co ₁₇ or Nd-Fe-B is preferable. Rare earth iron magnets such as this correspond to this. The rare earth cobalt magnet is an intermetallic compound magnet of a rare earth element and cobalt, and the rare earth iron magnet is an intermetallic compound magnet of a rare earth element and iron.

Particularly, neodymium magnet (Nd-Fe-B)
Has a residual magnetic flux density Br of about 12,500 G, a coercive force _B Hc of about 11500 Oe, and a maximum energy product BH _max of about 37.
MGOe, samarium cobalt magnet (Sm-Co ₂ )
Has a residual magnetic flux density Br of about 11200 G, a coercive force _B Hc of about 6700 Oe, and a maximum energy product BH _max of about 31 M.
GOe and magnet characteristics are excellent. How strong these are is that the residual magnetic flux density Br of the isotropic ferrite magnet that has been generally used until now is about 2
Since it is 200 G, the coercive force _B Hc is 1900 Oe, and the maximum energy product BH _max is about 1 MGOe, it is clear from the comparison with this. Therefore, as shown in FIG. 1, even if the suction surface 2a is a small and lightweight weight body 2, the adjustment weight 3
Can be firmly held.

Further, the neodymium magnet is excellent in mechanical strength against cracks, chips, etc., and this is used in this embodiment. The use of the neodymium magnet is restricted to 80 ° C. or lower, but the weight A for fishing has no problem because it cannot be used at a high temperature of 80 ° C. or higher. Since the coercive force is high and there is no demagnetization and the performance is semipermanently satisfied, it is extremely convenient as a constituent material of the weight body 2.

The adjusting weight 3 is a cylindrical body, and the cylindrical rod 1 is provided at the center thereof.
Is provided with an opening 32 that can be inserted into and is provided with a split groove 31 extending from the outer periphery to the opening 32, and has a substantially C-shape in a plan view. The split groove 31 is opened in the radial direction of the adjustment weight 3 so that the fishing line W can be guided into the opening 32. Here, although the opening 32 is a circular hole and corresponds to the cylinder of the support portion 13 of the cylindrical rod 1, the support portion 13 is formed into a prism and the opening 32 is formed.
It is also possible to correspond to a substantially C-shape in plan view with the square hole as a square hole. The width of the split groove 31 may be larger than the thickness of the fishing line W. The adjusting weight 3 is made of a ferromagnetic material, and more specifically, iron, nickel,
Any of cobalt (or containing two or more),
Others are made of alloys containing these metals. The adjustment weight 3 has an opening diameter of the support portion 1 so that the adjustment weight 3 can be fitted into the cylindrical rod 1.
Various sizes having different heights H or outer diameters D are prepared in accordance with the outer diameter of the fishing rod 3, and the weight of the fishing weight A can be adjusted. However, in terms of usability, the weight is adjusted by making the outer diameter D of the adjusting weight 3 approximately equal to the outer diameter d of the weight body 2 and changing the height H of the adjusting weight 3 to adjust the weight. It is considered desirable that the resistance does not increase under the use condition of A.

In setting the fishing weight A constructed as described above, first, the weight body 2 fixed to the cylindrical rod 1 is passed through the fishing line W in advance, and several pieces are prepared in accordance with a desired set weight. Select the most suitable adjustment weight 3 from the adjustment weights 3 shown. Then, using the split groove 31,
Guide the fishing line W into the opening 32 of the adjusting weight. After a while
When the adjustment weight 3 is inserted from the introduction portion 14, the adjustment weight 3 is attracted to the weight body 2 by magnetic attraction and easily integrated with one touch. Thus, the weight adjustment is completed without difficulty. If the weight adjustment is unsuccessful, the adjustment weight 3 can be removed against the magnetic attraction by inserting the claw into the boundary portion between the weight body 2 and the adjustment weight 3, and the weight can be readjusted. However, magnetic attraction is strong, especially neodymium magnets and samarium-cobalt magnets have excellent magnetic properties as described above.
The adjustment weight 3 does not fall off even if it is strongly thrown or gets wet in water. Although the magnetic attraction is strong in the pulling direction, it has a drawback that it easily slips on the magnetic surface and is weak in lateral displacement.
Is accommodated in the opening 32 of the adjustment weight 3, and the support portion locks the adjustment weight 3 to prevent lateral displacement, so that no problem occurs.
Further, the adjusting weight 3 which functions as a weight does not become a consumable item, but has an advantage that it can be stored as a replacement part and repeatedly used. In addition, if the cylindrical rod 1 is made common, there is the convenience that it can be applied to various types of weights only by aligning the adjustment weights 3 of one series.

Further, a weight body 2 made of a neodymium magnet.
In that case, it is robust and has excellent mechanical strength such as cracks and chips, and can withstand rough handling sufficiently. In the present embodiment, the weight 2 is a magnet and the adjustment weight 3 is a ferromagnetic body.
They may be reversed, or both the weight body 2 and the adjustment weight 3 may be magnets. However, in the case of using a neodymium magnet, it is preferable that the weight 2 which is sufficient for one piece is used as a magnet, and the adjustment weight 3 having a large number of parts for weight adjustment is made of a ferromagnetic material because the manufacturing cost is reduced.

(2) Embodiment 2 As shown in FIG. 3, the fishing weight of this embodiment has a small diameter portion 2
3 and a large diameter portion 22 and a weight 2 made of a neodymium plastic magnet having a vertical through hole 21, a ferromagnetic body, and an opening 32 at the center that can be fitted into the small diameter portion 23. From the plan view, in which the split groove 31 from the opening to the opening 32 is formed
It is composed of a character-shaped adjustment weight 3. The small diameter portion 23 bears the cylindrical rod 1 of the first embodiment. The fishing weight has a vertically long shape for ponds. Neodymium magnets also have the advantage that they can be combined with plastics to handle complex shapes. Here, the cylindrical rod 1 of Example 1 is also integrally formed by injection molding as a component of the weight body 2. The outer diameter of the adjustment weight 3 is made substantially equal to the outer diameter of the large diameter portion 22 of the weight body 2, and the weight of the adjustment weight 3 is adjusted by collecting parts having different lengths. Of course, the diameter of the adjustment weight 3 can be increased to adjust the weight. Also, although the number of magnet parts increases, the adjustment weight 3
Can be a magnet and the weight 2 can be a magnet or a ferromagnetic material. In this way, the fishing weight A has a reduced number of parts and a simplified structure in addition to the effects of the first embodiment.
Further, the contact portion between the adsorption surface 2a of the weight body 2 and the adhered surface 3a of the adjustment weight 3 spreads to the peripheral surface of the small diameter portion 23, so that the adjustment weight 3 is strongly magnetically held by the weight body 2. , There is no need to worry about dropping out. Further, it is possible to develop a product with improved durability by devising a design by combining with a plastic material having excellent mechanical strength such as impact resistance.

(3) Embodiment 3 The fishing weight A of this embodiment has a structure in which the insertion portion 34 of the adjusting weight 3 is inserted into the vertical through hole 21 of the weight body 2 as shown in FIG. is there. The weight body 2 is a ring body having a large vertical hole 21 corresponding to the outer diameter of the insertion portion 34, and is passed through the fishing line W in advance. The adjustment weight 3 has a body portion 33 that is substantially equal to the outer diameter of the weight body 2.
And an insertion portion 3 having an outer diameter that can be inserted into the vertical through hole 21.
Consists of four. A split groove 31 is formed from the peripheral surfaces of the body portion 33 and the insertion portion 34 to an opening 32 provided at the center, and the opening 32 of this embodiment is a hole through which the fishing line W passes. Weight adjustment is performed by changing the length of the body portion 33 of the adjustment weight 3,
Achieved. One of the weight body 2 and the adjustment weight 3 is a neodymium magnet, and the other is a ferromagnetic body or a neodymium magnet. In this embodiment, the weight 2 is made of a neodymium magnet, and the adjusting weight 3 is made of a ferromagnetic material. The fishing weight A configured in this way is
In addition to the effects of the first embodiment, the number of parts is reduced. Furthermore,
Since the contact portion between the suction surface 2a of the weight body 2 and the adhered surface 3a of the adjustment weight body 3 increases, the weight weight of the adjustment weight 3 is held by the weight body 2 in a stronger shape, so that there is no fear of falling off. . However, since the split groove 31 is provided in the portion through which the fishing line W passes, there is a risk of the fishing line W being caught, and this point is inferior to the first embodiment.

(4) Fourth Embodiment As shown in FIG. 5, the fishing weight of the fourth embodiment has a rubber tube 4 inserted from the bottom of the base 12 of the first embodiment into the vertical through hole 11 by using an adhesive or the like. The rubber tube 4 is fixed to the weight body 2. Here, the cylindrical rod 1 is composed of a base portion 12 and a support portion 13, and chamfering of the tip of the support portion is made large so that the adjustment weight 3 can be easily inserted into the support portion. Other configurations are the same as those of the first embodiment. In addition to the effect of the first embodiment, the fishing weight A configured in this way can be used not only as a hollow weight but also as a fixed weight by thrusting a toothpick 5 or the like into the rubber tube 4. , The scope of application is expanding.

The present invention is not limited to the embodiment described above, but can be variously modified within the scope of the present invention depending on the purpose and application. The size, shape, material and the like of the weight body 2, the adjustment weight 3, the cylindrical rod 1, and the rubber tube 4 can be appropriately selected according to the application.
For example, when using a relatively expensive neodymium magnet, it is possible to reduce the total cost by using a flat and thin shape. 1 to 3, the adjustment weight 3 is placed on the weight body 2 from above, but since it depends on the magnetic attraction, it may be attached to the fishing line W in an inverted state. Absent.

[0020]

As described above, the fishing weight A according to the present invention is a centering type weight, and there is no concern that the adjustment weight will fall out due to the strong magnet, and there will be no consumable part. ,
It has an excellent effect such as the weight can be adjusted very easily with one touch.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a manner of attaching a fishing weight to a fishing line in the first embodiment.

FIG. 2 is a vertical cross-sectional view of the fishing weight in a state where the adjustment weight of FIG. 1 is magnetically attracted to the weight body.

FIG. 3 is a perspective view showing how a fishing weight is attached to a fishing line in the second embodiment.

FIG. 4 is a perspective view showing how a fishing weight is attached to a fishing line in the third embodiment.

FIG. 5 is a vertical cross-sectional view of the fishing weight in a state in which the adjusting weight according to the fourth embodiment is magnetically attracted to the weight body.

FIG. 6 is an explanatory perspective view of a conventional technique.

FIG. 7 is an explanatory perspective view of a conventional technique.

[Explanation of symbols]

 1 Tube Rod 11 Longitudinal Hole 2 Weight 21 Longitudinal Hole 22 Large Diameter Part 23 Small Diameter Part 3 Adjustment Weight 31 Split Groove 32 Opening Hole A Fishing Weight

Claims (4)

[Claims] 1. A weight body (2) having a longitudinal hole and an adjustment weight (3) having a split groove, one of which is a magnet and the other is a ferromagnetic material or a magnet, and both are integrated by magnetic attraction. The weight for fishing that is characterized by being. 2. A cylindrical rod (1) having a longitudinal hole, a weight body (2) made of a ferromagnetic material or a magnet and fixed to the lower peripheral surface of the cylindrical rod, and a cylindrical rod fitted in the center of the cylindrical rod. An adjustment weight (3) having a possible opening and having a split groove extending from the outer periphery to the opening and having a substantially C-shape in plan view and held by the weight by magnetic attraction. A fishing weight. 3. A weight body (2) made of a ferromagnetic material or a magnet, having a small diameter portion and a large diameter portion and having a longitudinal hole, and an opening at the center which can be inserted into the small diameter portion, and has an outer periphery. From the opening to the opening, the adjusting weight (3) having a substantially C-shape in plan view and held by the weight body by magnetic attraction is provided. 4. The fishing weight according to claim 2, wherein the weight body is composed of a neodymium magnet or a samarium cobalt magnet.