KR20030064944A - A fishing float and a center pipe therein, and method of producing a fishing float - Google Patents

Abstract

Provides a simple fishing and passing through, smooth dropping, fishing bobber to capture fishery well, the central through tube of the bobber and a method of manufacturing the bob.

The central through hole 13 is embedded in the bobbin main body 11 of the fishing bobber 10 to form a central through hole 15, and the central through hole 15 is formed by the enlarged diameter portion 15a of the inlet and the normal of the outlet. Since the hole diameter part 15b is made into the shape of the slippery continuous trumpet, it is easy to manufacture a gear, and the passage to the center through-hole 15 becomes easy. In addition, the fishing line 12 falls smoothly, even beginners who do not know the reel operation of the full-flow fishing, can catch the fish of the habitat from the upper layer to the lower layer underwater. In addition, when there is an acquaintance, it captures this favorably.

Description

FISHING FLOAT AND A CENTER PIPE THEREIN, AND METHOD OF PRODUCING A FISHING FLOAT}

The present invention relates to a fishing bobber, a central through-pipe of the bobber, and a method for manufacturing the bobber, which, when submerged in water (sea), gently causes the fishing line to slide smoothly in the central through-hole and further to fishery (gushing). If there is, it relates to a fishing bobber which catches this favorably, the center penetrating through the bobber, and the manufacturing method of the bobber.

Reflecting the fishing boom in recent years, various tools for fishing have been newly developed, or uncomfortable points have been improved. The same applies to fishing bobbers. As a type of fishing bobber, it is known to hold fish on the surface of the sea to catch fish. Another bobber is also known which is used for all-flow fishing, called jourjournal fishing, in which the fishing gear is submerged under the surface of the water without attaching a bobbin to the fishing line. In this all-flow bobber, there is a relatively small central through bobber, for example, a wind bobber (common name) having a total length of 25 to 60 mm.

In addition, all-flow fishing is, for example, a sea fishing method, in which fishing gear is removed from the vicinity of the sea surface to the vicinity of the sea bottom without a bobber attached to the fishing line. This has the advantage of finding a fishing boat over a wide area in the depth direction, compared to a fixed-waste fishing with a fishing shelf fixed.

10 is a cross-sectional view showing a state of use of a fishing bobber according to a conventional means. With reference to this figure, the conventional bobbin is demonstrated concretely.

100 is a fishing bobber according to the conventional means. This fishing bobber 100 is an inclined weight type in which the cross section is in the shape of a jujube, and a central through tube 101 is embedded through both ends. The central through hole 102 serving as the channel of the central through pipe 101 is a straight hole having a uniform cross section over the entire length of the hole. Usually, the diameter is 2-3 mm.

In FIG. 10, 103 is a bobbin body, 104 is a weight, 105 is a fishing line, 106 is a swivel, 107 is a neckline, 108 is a round jade (weight) to adjust the descent speed of the gear, 109 is a fishing needle, 110 Silver bait, 111 is a semi-circle bead, and 112 is a zistop.

By the way, the former fishing rod was the external guide type which makes a fishing line pass through the guide ring fixed to the outer peripheral surface. On the other hand, in recent years, the interline rod type which makes a fishing line pass through the middle of a fishing rod has become mainstream. In order to pass the interline rod fishing line inside, the inside diameter of the fishing rod is thin and only 1.7 ~ 2mm. Therefore, if one wanted to aim at a deep fishing area, it was necessary to attach a very small bobber (rubber or thread) to the fishing line. As a result, it was difficult for beginners to make provision. In addition, if the bobbin stops at the tip of the ear, it will not be able to lower the bait to the pre-set fishing area.

In the conventional fishing bobbin, since the central through hole 102 was a straight hole having a relatively small diameter (? 2 to 3 mm), it was difficult to pass the fishing line 105 through the central through hole 102. In addition, the fishing line 105 is susceptible to the middle of the central through hole 102 due to scratches, entanglements, etc., and the fishing line 105 does not fall smoothly into the sea, and it is difficult to use for beginners (beginners).

In addition, among conventional teeth, a relatively large central through hole has a large diameter (3.5 to 5 mm). For example, the acorn tooth of 25-60 mm in total length, a basket tooth and a dormitory of 70-150 mm in total length are this. However, in all cases, the central through hole is a straight hole, and the main load is large. Therefore, there is also a relationship between the diameter ratio of the fishing line and the central through hole. However, the diameter of the central through hole is largely limited, and the dropping in the central through hole is too great and the fishery is not visible, and the general Baits and roots had a problem that the sinking speed of the bait is different, the bait to eat fish becomes bad, it is difficult to catch the fish.

1 is a cross-sectional view showing a state of use of a fishing bobber according to a first embodiment of the present invention.

2 is an enlarged front view of a fishing bobber according to the first embodiment of the present invention.

3 is an enlarged rear view of the fishing bobber according to the first embodiment of the present invention.

4 is a cross-sectional view taken along S4-S4 of FIG. 2.

Fig. 5 is an enlarged cross-sectional view of a central through tube according to another embodiment of the present invention.

6 (a) to 6 (c) are enlarged cross-sectional views of a central through pipe according to another embodiment of the present invention.

FIG. 7: (a)-(d) are explanatory drawing which shows the manufacturing process of the fishing bobber which concerns on 1st Example of this invention.

8 is a cross-sectional view showing a state of use of a fishing bobber according to a second embodiment of the present invention.

9 is a cross-sectional view showing a state of use of the fishing bobber of the third embodiment of the present invention.

10 is a cross-sectional view showing a state of use of a fishing bobber according to a conventional means.

(Explanation of symbols for the main parts of the drawing)

10, 30, 40... Fishing bobber 11, 11A, 11B. Main Body,

12... Fishing line 13, 13A-13F... End

15... Central through hole 15a, 15c, 15d... Expansion part (entrance)

15b. Ordinary hole diameters 21, 22. Bobber Molding Mold

The present invention is easy to produce the fabric, the line through the central through hole is also simple, and the fishing line can be smoothly dropped, and if there is a fishery, as in the case of ordinary fish, It aims at providing the fishing bobber and the central clearance of the bobber.

Moreover, an object of this invention is to provide the fishing bobber which is highly compatible with the tide flow of the fishing bobber, and which can make a fish eat bait without discomfort.

Moreover, an object of this invention is to provide the manufacturing method of the fishing bobber which can manufacture the fishing bobber which has these effects easily with few process water.

The invention as set forth in claim 1 has a central through hole in which a fishing line is loosely inserted in the bobbin body, and is used for all-flow fishing to sink the gear without attaching the bobbin to the fishing line. Silver is a fishing bobber which continues the entrance of a fishing line and the exit of this fishing line with the slippery inner wall, and this opening part made the opening area larger than the area of another part.

The fishing bobber is a central penetrating bobber used for all-flow fishing, and its kind, shape, size and the like are not limited. For example, it may be a mouthwash used in the state of floating on the water, or may be a sunburn that sinks at about the same speed as the face when the face is sunk under water. In addition, as the shape of the bobbin, a jujube egg shape, an acorn shape, a raft shape, or the like can be adopted.

Examples of the raw material of the main body include foamed urethane, expanded polyethylene, expanded polystyrene, foamed styrene, and the like. By using a foamable synthetic resin, it is possible to give buoyancy.

The material and thickness of the fishing line are not limited. However, it should be of a thickness that can be loosely inserted into the central through hole.

In addition, the use of round jade for picking is arbitrary. That is, only the weight of the fishing needle or bait attached to the tip of the neckline may allow the fishing line to slide down the inside of the central through hole slowly.

The length and shape of the center through hole are not limited. The central through hole can be formed in the body by using the central through pipe. Moreover, you may form in a main body directly.

The cross-sectional shape of the center through hole is not limited. For example, the shape may be any other than a cylindrical shape, an elliptic cylinder shape, a triangular shape polygonal shape or more.

Among the central through holes, the diameter of the smallest part is, for example, 1.5 to 3 mm, preferably 2 to 2.5 mm in the case of a relatively small central through tooth such as a wind bobber. Below 1.5mm, slippage is worse. Moreover, when it exceeds 3 mm, the problem that the slipperiness | lubricacy becomes too good and it is difficult to capture a fisherman will arise.

The invention according to claim 2 is the fishing bobber according to claim 1, wherein the bobbin main body is further embedded at an eccentric position spaced apart from the central through hole in the radial direction thereof.

The invention according to claim 3 is the fishing bobber according to claim 1, which is further embedded in an end of the outlet side of the central through hole in the bobbin main body.

The center of the bobbin is biased by the weight on the exit side of the bobbin main body, which is a so-called general standing bobbin type.

In the invention according to claim 4, the bobbin body is further embedded at an eccentric position spaced apart from its central through hole in the radial direction, and the specific gravity of the whole bobbin is slightly larger than 1, The thickness in the radial direction is thinner on the opposite side to this weight than the guess, and the end face on the opposite side is the fishing bobber according to claim 1 which is a flat surface orthogonal to the radial direction including the weight centered on the central through hole.

Due to the existence of the weight, the center of the bobbin is biased to one end of the bobbin body, thus becoming a so-called inclined bobber. In addition, since this specific gravity is slightly larger than 1, it may be a sinking tooth which sinks below the surface in synchronization with the bait.

The invention according to claim 5 is the fishing bobber according to any one of claims 1 to 4, wherein a diameter of an inlet of the central through hole is 3 mm or more.

The preferred diameter of the inlet is 4 to 6.5 mm. If it is less than 3mm, joule drop is bad, and it is especially difficult for beginners.

The degree of expansion of the central through hole is not limited. It may be a trumpet shape which is gradually expanded and hardened toward the entrance side.

The invention according to claim 6 is the fishing bobber according to any one of claims 1 to 5, wherein a sliding ring is fixed to at least the inlet from among the inlet and the outlet of the central through hole.

The sliding ring may be only at the entrance of the central through hole. It may be arranged at both the inlet and the outlet of the central through hole. Examples of this material include silicon carbide and alumina having self-activation.

In the invention according to claim 7, the center through hole is the fishing bobber according to any one of claims 1 to 6, which is formed by a pipe fixed to the bobbin body.

The invention as set forth in claim 8 is a central through-hole of a fishing bobber which is embedded at the axial position of the bobbin main body of the fishing bobber used for all-flow fishing to sink the gear without attaching the bobbin to the fishing line. In addition, the inlet of the fishing line and the outlet of the fishing line are continuous with a slippery inner wall, and the inlet is a central through-hole of the fishing bobber whose opening area is larger than that of other parts.

The material of the central through pipe may be the same as that of the main body or may be different. As a specific raw material, various synthetic resins, various trees, etc. are mentioned, for example.

The shape, diameter and the like of the central through tube are not limited. For example, it may be a tubular shape along the shape of the central through hole. Although the external appearance is a straight pipe, the center through-hole which has a diameter-expansion part may be formed in the pipe.

The invention according to claim 9, wherein the aperture of the inlet of the center through-hole is 3 mm or more in the center through-hole of the bobber for fishing according to claim 8.

The invention according to claim 10 is the center through pipe of the fishing bobber according to claim 8 or 9 in which a sliding ring is fixed to at least the inlet from the inlet and the outlet of the center through pipe.

The invention according to claim 11 further comprises a step of forming a central through-hole of the fishing bobber, wherein the inlet of the fishing line and the outlet of the fishing line are continuous with a slippery inner wall and the opening area of the inlet is larger than the area of the other portion; And attaching the central through pipe to the mold for forming the main body by turning the tube end to the outside, and after the mounting, filling the main body molding material into the mold for forming the main body, and It is a manufacturing method of the fishing bobber provided with the process of shape | molding the integrated bobbin body, and the process of removing both ends of the center through-tube which protruded from the said bobbin body after demolding.

Various molding methods using a synthetic resin material can be employed for molding the central through pipe. In the molding, a general-purpose central through-molding die is used. In addition, a general-purpose thing is used also for a die body shaping | molding die. For example, injection molding or simple press molding may be used.

Examples of the central through-molded material include silicone, ABS, polypropylene, glass, and the like. Moreover, it can contain or apply | coat a lubricant etc. which raise the activity of a tube inner surface.

Examples of the main body molded material include foamed urethane, expanded polyethylene, expanded polystyrene, expanded styrene, and the like. By using a foamable synthetic resin, buoyancy can be given to a fishing bobber.

When the central through pipe is mounted inside the mold for forming the main body, only one end of the central through pipe may protrude out of the mold. Both tip portions may be used.

When removing the protruding end of the protruding center through tube, cutting may be adopted by a cutter or the like, or other methods may be employed.

According to the fishing bobber of Claims 1 thru | or 7, the shape of a center through-hole is continuous with the inlet of a large opening area like a taper hole, and the exit of a small diameter is slippery, and differs from the opening area of an inlet. Since it is larger than the part, it is easy to manufacture a gear, and the line passage to a center through hole becomes easy. In addition, when the gear is dropped on the surface (sea surface), a fishing line (usually a fishing line) without a bobbin slides through the central through hole and falls into the water (sea). At this time, since the entrance of the central through hole is large diameter, even if the fishing line has a wound or twist, the fishing line is smoothly sent to the central through hole.

In addition, when a fish moves with a bait, the part which is not large diameter other than the entrance of a center through hole and a fishing line rub with each other. Due to the frictional resistance at that time, the fishing bobber is drawn into the sea with this part as a support point. As a result, the fishing bobber of this invention captures a fishery satisfactorily even without a bobbin stop.

Moreover, since this center through hole is a taper hole etc. with a large entrance, even beginners can enjoy full-flow fishing easily. That is, in the all-flow fishing using the fishing bobber in which the conventional center through hole is a straight hole, the technique of making a fishing line taut by the reel operation was needed. However, if the fishing bobber of the present invention is used, such a technique is unnecessary because the central through hole is a trumpet shape or the like. As a result, even beginners can find fish from underwater layers to deep habitats, increase catches, and increase target species.

In this way, the entrance portion is slipped and hardened (trumpet shape, etc.), so that even in the case of a relatively small central penetrating bobber such as a wind bobber or a larger central penetrating bobber, for example, the inlet through which the fishing line enters the central through hole. The gap becomes wider and the curved surface is only used, and when the dribble is dropped into the water (undersea), it falls down smoothly without further resistance. In addition, since the diameter of the entrance of the central through hole is large and the diameter of the other portion of the small diameter is changed according to the shape, shape, size, etc. of the bobbin, the speed of the dropping of the rope can be changed.

In particular, according to the fishing bobber of Claim 4, since the edge part on the opposite side to the weight which becomes a part of the water surface of the inclined bobber type drier is thin, and the end surface was made into the flat surface, the fishing bobber Synchronization with tide flow increases. As a result, fish can be eaten without discomfort.

According to the central through-hole of any one of Claims 8-10, it is used by embedding in a fishing bobber, and is optimal for the said all-flow fishing. Moreover, if it is comprised by the type of uniform thickness, manufacture of the pipe and bobber will be easy and the intensity | strength of the pipe itself will also become high.

According to the manufacturing method of the fishing bobber of Claim 11, a center through-hole is formed previously by a well-known technique. The inlet of the molded central through pipe is larger in diameter than the other parts. Next, this center through tube is mounted inside the die body molding die. At this time, the pipe end of the center through tube is projected out of the mold. From this, the main body molding material is filled in the mold, and the main body integrated with the central through tube is molded. After demolding, the fishing bobber is manufactured by removing the pipe end of the protruding central through pipe. Thereby, the fishing bobber which has the said effect can be manufactured with few process water.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described based on drawing. First, the first embodiment will be described.

1 is a cross-sectional view showing a use state of a fishing bobber according to the first embodiment of the present invention. 2 is an enlarged front view of a fishing bobber according to the first embodiment of the present invention. 3 is an enlarged rear view of the fishing bobber according to the first embodiment. 4 is a cross-sectional view taken along the line S2-S4 of FIG. 2.

In Fig. 1, 10 is a fishing bobber according to the first embodiment, and this fishing bobber 10 is of an inclined bobbin type used for all-flow fishing. The fishing bobber 10 is provided with the bobbin main body 11, the center bobbin 13 which is provided inside this bobbin main body 11, and the fishing line 12 passes, and the weight 14 is provided.

The bobbin main body 11 is a jujube-shaped bobbin member having a substantially triangular cross section (see FIGS. 2 to 4), and is molded of a foamed urethane resin in order to float the fishing bobber 10 on the surface of the water. The central through tube 13 is internally molded through both ends of the bobbin body 11.

The central through tube 13 is made of ABS. In addition, the pipeline of the central through tube 13 is the central through hole 15. In the central through hole 15, the opening on the inlet side is a diameter-diameter portion 15a having a diameter of 5.2 mm, and the opening on the outlet side is a normal hole diameter portion 15b having a diameter of 2.2 mm. The enlarged diameter portion 15a has a trumpet shape that is gently expanded in the outward direction. At the exit side of the enlarged diameter portion 15a, a sliding ring 16 having high self-activation for further improving the dropping of the fishing line 12 is fixed. The sliding ring 16 is made of silicon carbide or alumina.

In Figure 1, 17 is a rotating ring, 18 is a neck, 19 is a round jade, 20 is a fishing needle, 21 is a bait.

In addition, the shape of the said center through-hole 13 is not limited to what is shown in FIG. For example, you may employ | adopt the thing of another shape as shown to the enlarged sectional drawing of the center through tube which concerns on FIG. 5 (a)-FIG. 5 (c) and another embodiment of FIG. 6 (a)-FIG. 6 (c). .

That is, the center through pipe 13A in Fig. 5A shows the ratio of the opening area between the enlarged diameter portion 15a on the inlet side and the normal hole diameter portion 15b on the outlet side to the center through tube (the first embodiment). It is an example larger than the case of 13).

The center through tube 13B of FIG. 5B is an example in which a relatively small diameter-diameter portion 15c which is gradually enlarged in the outward direction is provided in an opening on the outlet side.

The central through tube 13C of FIG. 5C is an example in which the enlarged diameter portion 15d of the same size is disposed in the opening portion at the inlet side and the outlet side. By this arrangement, the effect that the slip is good is obtained.

In addition, the center through pipes 13D to 13F of FIGS. 6A to 6C show the center through pipes 13A to 13C shown in FIGS. 5A to 5C as straight pipes. As thick as possible. In this way, since the outer shape is made cylindrical by partially thickening, damage during handling of the central through pipe is reduced. In the manufacturing of fishing bobbers, other types of central through-pipes can simply be incorporated into the bobbins at the manufacturing site, even if large-scale molds do not undergo design changes.

Next, all-flow fishing in the breakwater using the fishing bobber 10 of this 1st Example is demonstrated.

As shown in FIG. 1, when the fishing rod outside the island is swung and the gear is dropped on the sea surface, the fishing line 12 without a bobbin slides down into the sea through the center through-hole 15. As shown in FIG. At this time, since the enlarged diameter portion 15a having a diameter of 3 mm or more is provided on the inlet side of the central through hole 15, even if the fishing line 12 is scratched or twisted, the fishing line 12 is smoothly provided in the center through hole. Pass (15) and slowly drop down to find the habitat of the fish.

In addition, since the shape of the enlarged diameter portion 15a is a trumpet shape that is gradually expanded in the outward direction, it is merely curved even when the fishing line 12 enters the central through hole 15 at a large interval. The resistance at the time of jogging is even smaller. In addition, since the sliding ring 16 is provided, this resistance is further reduced.

On the other hand, in the case of fishing, when the fishing line 12 passes through the normal hole diameter portion 15b of the central through hole, the fishing line 12 rubs against this inner peripheral surface. In this case, the fishing bobber 10 usually enters the sea while the fishing line 12 is attracted by the point P of the hole diameter portion 15b as the support point. As a result, the fishing bobber 10 of this invention can capture a fishery well, even without a bobbin stop.

In addition, since the central through-hole 15 is largely hardened so that file dropping is favorable, fishing bobbins and bobbin stops are unnecessary, and it is easy to manufacture a gear. In addition, the passage of the rope to the central through hole 15 is also simplified. In addition, even a beginner without a reel operation requiring skill for bringing the fishing line 12 into tension can enjoy a full-flow fishing lightly.

Here, the manufacturing method of the fishing bobber which concerns on 1st Example of this invention is demonstrated based on FIG. In addition, the manufacturing method by injection molding is demonstrated here.

7 (a) to 7 (d) are explanatory views showing the manufacturing process of the fishing bobber according to the first embodiment of the present invention.

Injecting and filling the ABS through-form molding material made of ABS into the inner space of the through-mold mold (out of the drawing) in advance, and injection-molding the through-center 13 having the enlarged diameter portion 15a having a diameter of 5.2 mm in the opening on the inlet side. Doing.

Next, this molded center through tube 13 is attached to the designed recesses 21a and 22a of the die body forming dies 21 and 22. At this time, the pipe end portions 13a and 13b of the center through tube 13 are projected out of the designed recesses 21a and 21b.

Subsequently, the die body molding dies 21 and 22 are fitted together, and the die body molding material is injected and filled into the inner space of the die from the injection port 21b. Thereby, the main body 11 integrated with the center through-pipe 13 is injection-molded.

Next, this is demolded from the die body forming molds 21 and 22, cooled, and then both pipe end portions 13a and 13b which protrude out of the central through tube 13 are cut by a cutter outside the drawing. Remove In this way, the fishing bobber 10 is manufactured. Thereby, unlike the case of the manual work which used the conventional wooden piece as a raw material, the fishing bobber 10 which has the said effect can be simply mass-produced with few process numbers.

Next, based on FIG. 8, the fishing bobber which concerns on the 2nd Example of this invention is demonstrated. 8 is an enlarged cross-sectional view of a state of use of a fishing bobber according to a second embodiment of the present invention.

As shown in FIG. 8, in the fishing bobber 30 of 2nd Example, it is the same as that of the conventional means shown in FIG. 10, and has 11 A of jujube-shaped teeth main bodies. In addition, the embedding position of the weight 14A in this bobbin main body 11A is moved to the exit side of the central through-pipe 13. As a result, it becomes a standing type bobber. In this standing type tooth type, the same effect is obtained because it is used in the same manner as the inclined tooth type of the first embodiment.

Since other structures, functions, and effects can be estimated from the first embodiment, description thereof is omitted.

Next, based on FIG. 9, the fishing bobber which concerns on 3rd Example of this invention is signed. 9 is a cross-sectional view showing a state of use of the fishing bobber of the third embodiment of the present invention.

As shown in FIG. 9, the fishing bobber 40 of 3rd Example is an example which set it as a sinking bobber type instead of the mouthwash type of 1st Example. In addition, the thickness in the radial direction of the main body 11B centered on the center through-hole 15 is made thinner on the opposite side than guessing. Moreover, the end surface 11a on the opposite side to the weight 14 of the bobbin body 11B is made into the flat surface.

With such a configuration, the height position in the main body 11B of the center through hole 15 in the use state of the bobbin is higher than that in the center through hole 15 of the first embodiment. In addition, the end surface (upper surface in the use state) of the side close to the center through hole 15 of the main body 11B is a flat surface substantially parallel to the center through hole 15. Therefore, the resistance of the water to the fishing bobber 40 is small, and the synchronism with respect to the tide flow of the fishing bobber 40 is high. As a result, fish can be eaten without discomfort. As such, the present invention does not select the type of bobber. As another example, the fishing bobber 30 of the standing jaw type of the second embodiment may be changed to a sinking jaw type.

Other configurations, operations, and effects are within a range that can be estimated from the first embodiment, and thus description thereof is omitted.

According to the fishing bobber of any one of Claims 1-10, and the center through-hole of the bobber, the shape of a center through-hole is continuous with the inlet which has a large opening area, and the outlet whose smaller opening area is a slippery inner wall, Since the opening area of the inlet is made larger than the other parts, the preparation is easy and the passage of the rope to the central through hole is also simplified. Further, the joules fall smoothly, so that even a beginner who is not aware of the reel operation of all-flow fishing, for example, can catch fish from the upper layer to the lower layer in the water. In addition, if there is a fisherman, the fisherman is preferably captured.

Especially in the fishing bobber of Claim 4, since the edge part on the opposite side to the inclined bobbin-type weight was made thin, and the end surface was made into the flat surface, the synchronization with respect to the tide flow of the fishing bobber becomes high, , You can let the fish eat the bait without discomfort.

Further, in the fishing bobber and the central through-pipe according to Claims 6 and 10, since the sliding ring is fixed to at least the inlet of the central through-hole, the dropping when the equipment is submerged in water becomes more favorable.

In addition, according to the method for manufacturing a fishing bobber according to claim 11, the center through tube is molded, and the tube is fitted with a mold for forming a body to fill in the mold body forming material in the mold, and the body is integrated with the center through tube. After shaping and demolding, both ends of the central through-tube are removed to manufacture fishing bobbers, so that fishing bobbers having the above effects can be easily produced with a small number of steps.

Claims (11)

As a fishing bobber used for all-flow fishing, which has a central through hole in which the fishing line is inserted loosely in the bobbin body, and that the fishing line is settled without the bobbin being attached to the fishing line, The center through hole is a fishing bobber characterized in that the inlet of the fishing line and the outlet of the fishing line are continuous with a slippery inner wall, and the inlet has an opening area larger than that of other portions. The bobber for fishing according to claim 1, wherein the bobbin main body is further embedded in an eccentric position spaced apart from the central through hole in the radial direction thereof. The bobber for fishing according to claim 1, wherein the bobbin main body is further embedded at an end portion of the outlet side of the central through hole. 2. The bobbin body according to claim 1, wherein the bobbin main body is further embedded at an eccentric position spaced apart from the central through hole in its radial direction, and the specific gravity of the whole bobbin is slightly larger than 1, and the diameter of the main body centered on the central through hole. The thickness of the direction is thinner than the other side of the weight than guess, the end surface of the opposite side is a fishing bobber, characterized in that the flat surface orthogonal to the radial direction including the weight centered on the center through-hole. The bobber for fishing according to any one of claims 1 to 4, wherein a diameter of an inlet of the central through hole is 3 mm or more. The fishing bobber according to any one of claims 1 to 5, wherein a sliding ring is fixed to at least the inlet from among the inlet and the outlet of the central through hole. The fishing bobber according to any one of claims 1 to 6, wherein the central through hole is formed by a pipe fixed to the bobbin body. As a central clearance of the fishing bobber, which is buried at the axial position of the bobber body of the fishing bobber used for all-flow fishing to sink the gear without putting the bobbin on the fishing line, and the fishing line is loosely inserted, A fishing line inlet and an outlet of this fishing line are connected to a slippery inner wall, and said inlet has made the opening area larger than the area of another part. 9. The central through tube of the fishing bobber according to claim 8, wherein the opening of the central through tube has a diameter of 3 mm or more. 10. The center through tube of a fishing bobber according to claim 8 or 9, wherein a sliding ring is fixed to at least the inlet portion among the inlet and the outlet of the center through tube. Forming a central through-tube of the fishing bobber, wherein the inlet of the fishing line and the outlet of the fishing line are continuous with a slippery inner wall and the opening area of the inlet is larger than the area of the other portion; Attaching the central through pipe to the mold for forming the main body by protruding the pipe end outward; After the mounting, filling the main body molding material into the main body molding die and molding the main body integrated with the central through-hole; And And a step of removing both ends of the central through-tube projecting from the bobbin body after demolding.