JP7143971B2 - buoyancy fine adjustment float - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of a float used for fishing, and more particularly to a float capable of finely adjusting the buoyancy and sinking a tackle in sync with the sinking speed of bait.

Usually when float fishing is done from the shore, the fish are collected by spreading bait. Many anglers are seeking to reduce the wariness of fish and obtain fishing results by mixing the bait with the bait and sinking it together.

Therefore, various methods have been tried so that the bait attached to the hook at the tip of the tackle below the float sinks in sync with the bait.
The methods of adjusting the buoyancy of the float to synchronize with the sedimentation of the bait are mostly by "changing the weight" or "changing the volume" of the float. At present, there are many floats whose buoyancy can be adjusted by changing the volume of the float. Time consuming.

JP-A-11-4644 JP-A-2003-92961 Japanese Patent Application Laid-Open No. 2013-220100

The purpose of the present invention is to propose a method based on the fact that the conventional method of adjusting the buoyancy by the volume of the float could not make fine adjustments with high accuracy. To provide a floating structure capable of easily performing fine adjustment of buoyancy.

The buoyancy fine-adjustment float of the present invention is composed of an upper buoyant body, a lower gravity body, a waterproof elastic ring, a waterproof elastic tube, a hollow threaded shaft or a threaded shaft, and an adjustment nut,
The upper buoyant body and the lower gravity body constitute floats facing each other, and their opposing surfaces are flat surfaces, and the waterproof elastic ring is interposed therebetween to form a sealed air chamber,
The lower gravity body is provided with a through hole penetrating its axis,
One end of the hollow threaded shaft or the threaded shaft is fixed to the upper buoyancy body and is inserted through the through-hole of the lower gravity body so that the threaded portion of the other end protrudes from the through-hole opening,
the waterproof elastic tube passes through the hollow threaded shaft or the threaded shaft of the air chamber and seals the through hole of the lower gravity body;
The adjusting nut is screwed onto the threaded portion protruding from the opening of the through hole of the lower gravity body. By rotating the adjusting nut, the distance between the lower gravity body and the upper buoyancy body can be changed to change the air chamber. The buoyancy fine adjustment float is characterized in that the buoyancy of the float can be adjusted by changing the volume of the buoyancy.

Also, in the above configuration,
The upper and lower peripheral edges of the waterproof elastic ring are provided with recessed or stepped engagement grooves, and the opposing outer peripheral edges of the upper buoyant body and the lower gravity body are provided with an upper waterproof projection ring and a lower waterproof projection that mesh with the engagement grooves, respectively. Forming a ring seals the air chamber.

Further, a scale is displayed radially from the opening around the opening of the through-hole of the lower gravity body,
An anti-slip shape is formed on the outer periphery of the adjustment nut to prevent slippage when the adjustment nut is turned to adjust the buoyancy, and an arrow pointing to the scale of the lower gravity body is provided as a guide for adjusting the buoyancy. and

The adjustment nut is rotated to compress and deform the waterproof elastic ring through the lower gravity body, thereby changing the space between the upper buoyant body and the lower gravity body, thereby changing the volume of the air chamber and adjusting the buoyancy. By rotating the nut, the buoyancy of the float can be adjusted steplessly and finely with high accuracy.

1 is an exploded view of the float of the present invention; FIG. Figure 2 is a perspective view of the float of the present invention; FIG. 3 is an assembled sectional view of the float of the present invention; FIG. 4 is a schematic side view of the float of the present invention; FIG. 5 shows Embodiment 1 of the float of the present invention. FIG. 6 shows Example 2 of the float of the present invention.

A specific configuration of the present invention will be described below with reference to the drawings.

An embodiment of the invention is shown in FIGS.
Consists of an upper buoyant body 10, a lower gravity body 20, a waterproof elastic ring 30, a waterproof elastic tube 31, a threaded shaft 41 and an adjusting nut 50,
The opposing surfaces of the upper buoyant body 10 and the lower gravity body 20 are substantially flat surfaces, and an upper waterproof projection ring 11 and a lower waterproof projection ring 21 are formed on the outer peripheral edges thereof, respectively. Engagement grooves 33, 33 are provided to mesh with these, a through hole 22 is provided in the axial center of the lower gravity body, and a scale 23 is radially displayed around the opening of the through hole 22 from the opening.

To assemble and configure the float from the above members,
The threaded shaft 41 is inserted through the center of the flat surface of the upper buoyant body 10 and fixed. A threaded portion 42 provided at the tip of the through hole passing through the axial center is protruded from the opening of the through hole 22 at the bottom end of the lower gravity body 20 , and the adjusting nut 50 is screwed onto the threaded portion 42 .

In this assembled state, a hollow air chamber 32 is formed between the upper buoyant body 10 and the lower gravity body 20 with the waterproof elastic ring 30 interposed therebetween, as shown in FIG.
The upper and lower peripheral edges of the waterproof elastic ring 30 are provided with recessed or stepped engagement grooves 33, which are engaged with the upper waterproof protrusion ring 11 of the upper buoyant body 10 and the lower waterproof protrusion ring 21 of the lower gravity body 20, respectively. Thus, the air chamber 32 formed between the upper buoyant body 10 and the lower gravity body 20 is sealed.
The material of the waterproof elastic tube 31 is made of a non-water-absorbing elastic material, and functions as a waterproof seal and elasticity for the through-hole 22 of the lower gravity body.

The air chamber 32 forms a sealed space between the upper buoyant body 10 and the lower gravity body 20 to prevent water from entering from the outside due to the waterproof action of the waterproof elastic ring 30 and the waterproof elastic tube 31 . , which serve to impart adjustable buoyancy to the float.

One end of a hollow threaded shaft 40 (see FIG. 6) or a threaded shaft 41 is fixed to the upper buoyant body 10, and the other end is inserted through the waterproof elastic tube 31 to pass through the through hole 22 of the lower gravity body 20. and protrudes its threaded portion 42 from its opening.

The adjustment nut 50 is screwed into a hollow threaded shaft 40 (see FIG. 6) or a threaded portion 42 projecting from the opening of the through hole of the lower gravity body 20 at the tip of the threaded shaft 41 through a threaded hole 51 .
In addition, a non-slip shape 52 consisting of fine grooves is formed on the outer circumference of the adjusting nut 50 to prevent slippage when the adjusting nut 50 is rotated to adjust the buoyancy. An arrow 53 pointing toward is provided by engraving or the like, and serves as a guideline for adjusting the buoyancy according to the memory 23 of the lower gravity body 20 .

In the above configuration, the specific gravity of the float itself provides a slight buoyancy to allow hovering in the water. The space is narrowed, the waterproof elastic ring 30 is compressed, the volume of the air chamber 32 is reduced, and the volume of the entire float is reduced, so that the specific gravity is increased and the float sinks. Also, by relatively loosening the adjusting nut 50, the overall volume increases and the buoyancy increases, so that the float is lifted.

Since the lower gravity body 20 is combined with the upper buoyancy body 10 to form a float, a certain weight is added to the upper buoyancy body so that the upper buoyancy body comes upward in the water. If the posture of the float can be properly maintained by other structures such as 50, or if the float itself is used in a hovering state in which it floats in water, the lower gravity body 20 is the same as the upper buoyancy body 10. A buoyant body made of a material having a specific gravity of

The function of the buoyancy fine adjustment float described above will be described with reference to the schematic diagram of the embodiment shown in FIG.
In FIG. 4, the calculation theory assumes that the upper buoyancy body 10 and the lower gravity body 20 are hemispheres and the adjusting nut 50 is a cylinder.

With the marked dimensions shown in Fig. 4, when calculating the relative relationship between specific gravity and buoyancy due to changes in volume:
Volume of upper buoyant body 10 = 4/3πr ³ × 1/2 = 8.579 cm ³ ,
Volume of lower gravity body 20 = 4/3πr ³ × 1/2 = 8.579 cm ³ ,
Volume of waterproof elastic ring 30 = πr ² ×L = 4.021 cm ³ ,
Volume of adjusting nut 50 = πr ² ×L = 0.741 cm ³ ,
Total float volume = 8.579 + 8.579 + 4.021 + 0.741 = 21.650 cm ³ ,
Weight at which neutral buoyancy (hovering) occurs when the specific gravity of water is 1.0 = 21.650g,
The volume reduction amount when the width of the waterproof elastic ring 30 of 5 mm is compressed to 4 mm is:
4.021×1/5=0.804 cm ³ ,
Volume after compressing the float = 21.650 - 0.804 = 20.846 cm ³ ,
Specific gravity after compression = mass (weight) of object/volume = 21.650/20.846 = 1.039,
That is, by compressing the waterproof elastic ring 30 by 1 mm, a specific gravity change of 1.000 to 1.039 can be obtained.

Normally, the specific gravity of sea water is 1.024, and even if fresh water flows in from the land and dilutes the sea water to make the specific gravity lighter, it is possible to adjust the buoyancy from slight buoyancy to slight sinking within the adjustment range.

By compressing the air chamber 32 of the float, the volume of the waterproof elastic ring 30 protrudes slightly to the outside, causing an error. make adjustments.
In implementing the float of the present invention, it is necessary to classify the type of float into large, medium, small, etc., according to the user's preference, and to classify the buoyancy into large buoyancy, slight buoyancy, negative buoyancy, and the like.
Therefore, the buoyancy classification of the float body may be adjusted in advance by embedding a predetermined weight 54 therein.

As a method of using the float of the present invention, a case where it is used in an external hanging type will be described with reference to FIG.
A hook 43 is passed through a through hole 42 at the tip of a shaft 41 with a screw, a loop at one end of a fishing line guide 44 is hooked on the hook 43, and a fishing line 60 is passed through the loop at the other end. (Explanation of other mechanisms is omitted). According to this method, it is possible to quickly replace the float with a suitable float in response to changes in fishing ground conditions.

FIG. 6 shows its use as a threading float.
A fishing line is passed through the hollow portion of the hollow threaded shaft 40 as shown in the figure. The advantage of this through-hole type float is that the gimmick is less likely to get entangled in the float.

10 upper buoyant body
11 Upper waterproof protrusion ring
20 lower gravity body
21 Lower waterproof protrusion ring
22 through hole
23 memory
30 waterproof elastic ring
31 waterproof elastic tube
32 air chamber
33 Engagement groove
40 hollow threaded shaft
41 Threaded Shaft
42 through hole
43 Hook
44 Line Guide
45 Sarkhan
50 Adjusting nut
51 screw hole
52 anti-slip shape
53 arrows
54 weights
60 fishing line

Claims (3)

It consists of an upper buoyant body, a lower gravity body, a waterproof elastic ring, a waterproof elastic tube, a hollow threaded shaft or a threaded shaft, and an adjustment nut,
The upper buoyant body and the lower gravity body constitute floats with their opposing surfaces being flat surfaces, and the waterproof elastic ring is a cylinder having an outer diameter corresponding to the outer diameter of the upper buoyant body and the lower gravity body. form a sealed air chamber inserted between the two ,
The lower gravity body is provided with a through hole penetrating its axis,
One end of the hollow threaded shaft or threaded shaft is fixed to the upper buoyant body and is inserted through the through hole of the lower gravity body so that the threaded portion of the other end protrudes from the through hole opening,
the waterproof elastic tube passes through the hollow threaded shaft or the threaded shaft of the air chamber and seals the through hole of the lower gravity body;
The adjustment nut is screwed onto a hollow threaded shaft projecting from the through hole opening of the lower gravity body or a threaded portion of the threaded shaft,
The buoyancy of the float can be adjusted by rotating the adjusting nut to change the space between the lower gravity body and the upper buoyant body, thereby changing the volume of the air chamber.
Buoyancy fine-tuning float. The upper and lower peripheral edges of the waterproof elastic ring are provided with recessed or stepped engagement grooves, and the opposing outer peripheral edges of the upper buoyant body and the lower gravity body are provided with an upper waterproof projection ring and a lower waterproof projection ring that mesh with the engagement grooves, respectively. 2. The buoyancy fine adjustment float according to claim 1, wherein said air chamber is sealed by forming a waterproof projection ring. A scale is displayed radially from the opening around the opening of the through hole of the lower gravity body,
An anti-slip shape is formed on the outer circumference of the adjusting nut to prevent slipping when the adjusting nut is turned to adjust the buoyancy, and an arrow pointing to the scale of the lower gravity body is provided to adjust the buoyancy. 3. The buoyancy fine adjustment float according to claim 1 or 2, which is used as a guide.

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