JPS62115225A - Constant depth diving board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diving board that is towed by a ship and carries fishing gear backwards under tension.

[Conventional technology]

As a conventional diving board, one shown in FIG. 6, for example, is known.

The conventional diving board a is constructed in the shape of a flat ship. A hook b is attached to the tip of the submersible plate a, and the submersible plate a is towed by a ship (not shown) via the hook b and a towing line C. A fishing gear d with an artificial bait and a fishhook is tied to the rear end of the diving board a, and the fishing gear d is drifted behind the diving board a.

[Problem that the invention seeks to solve]

The swimming depth of the target fish varies depending on the weather, water temperature, etc. that day. However, when the submersible plate a is towed by a ship, the submersible plate a dives underwater, but the submersible plate a cannot be submerged to a desired diving depth. In particular, if you change the boat speed, the diving board a
The diving depth of the ship also changed constantly, making it impossible to obtain the desired diving depth for any given ship speed.

[Purpose of the invention]

The present invention was made to solve the above-mentioned problems, and its purpose is to provide a constant depth diving board that can obtain a desired diving depth at any ship speed.

[Means for solving problems]

In order to achieve the above object, the present invention rotatably supports a wing plate at the rear end of a towing plate that is towed by a boat and carries fishing gear backward under tension, and the numerical values of the boat speed and diving depth are [Written 1] The plate is installed vertically on the towing plate, one end of the diving angle adjustment rod extending in the direction of the scale plate is fixed to the wing plate, and the other end is attached to the scale plate so that it can be fixed freely. be.

[Action of the invention]

According to the present invention having the above configuration, the wing plate is fixed at a predetermined angle by fixing the diving angle adjusting rod in accordance with the desired boat speed and desired diving depth on the scale plate. In this state, when the deep diving board is towed by a ship with the wing plate facing downward, a force corresponding to the desired ship speed and desired diving depth on the scale plate is applied upward at right angles to the wing plate. For this reason,
A constant depth diving board has a force that forces its front part downward, and receives a sinking force from the water current.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 5.

A deep diving board 1 according to an embodiment of the present invention includes a towing board 3 towed by a ship 2 via a towing line 2a, and a rear end portion 3 of the towing board 3.
A wing plate 4 attached to a via a hinge 3'' and a towing plate 3
The submergence angle adjusting rod 6 is fixed to the wing plate 4 via a rivet 4a and extends in the direction of the scale plate 5.

The towing plate 3 is constructed in the shape of a flat ship to reduce resistance. The scale plate 5 has a fan-shaped shape, and on its surface are written the ship speed (2 knots to 6 knots) and diving depth (1 m to 9 m) determined through experiments. Since the scale plate 5 is vertically installed on the towing plate 3, it also functions to maintain the traveling direction of the depth diving plate 1.

A U-shaped stop 5a and a pole 6b are provided at the tip of the diving angle adjustment rod 6, and the rod is fixedly attached to the fan-shaped circumferential side 5'' of the scale plate 5, and a hook is provided at the rear end. 6
c is provided. A fishing gear 7 with an artificial bait and a fishhook is tied to this hook 6C, and the fishing gear 7 is flown behind the diving board l and is in a tensioned state.

Next, the operation of this embodiment will be explained.

For example, if the cruising speed of ship 2 is set to 6 knots, the depth diving board 1
When attempting to submerge at a diving depth of 9 m, when the diving angle adjustment rod 6 is fixed at position A on the scale plate 5, the wing plate 4 becomes steeply inclined (AI). When the ship 2 moves at 6 knots in this state, the deep diving board 1 moves underwater at a depth of 9 m.

When the cruising speed of the ship is set to the same 6 knots and the constant depth diving plate 1 is to be submerged at a diving depth of 1 m, when the diving angle adjustment rod 6 is fixed at position B on the scale plate 5, the wing plate 4 is a gentle slope (Bl). When the ship 2 moves at 6 knots in this state, the deep diving board 1 moves underwater at a depth of 1 m.

When changing the cruising speed of the ship to 4 knots and attempting to submerge the constant depth diving plate 1 at a diving depth of 1 m, fixing the diving angle adjustment rod 6 on the scale plate 5 at position C, the wing plate 4 has a medium slope (C1). When the ship 2 moves at 4 knots in this state, the deep diving board 1 moves underwater at a depth of 1 m.

The reason why, as described above, when the ship speed and the inclination of the wing plate 4 are set to predetermined values, a corresponding diving depth can be obtained will be explained with reference to FIGS. 4 and 5.

By providing the vane plate 4, a right-angled force F acts on the vane plate 4, and if the tip 3b of the towing plate 3 is used as a reference, the bending moment I
-FL acts counterclockwise. On the other hand, towing plate 3
Since the tip portion 3b of is pulled by the towing line 2a, the constant depth diving plate 1 is rotated by the bending moment FL and forms an angle θ with respect to the horizontal plane. Therefore, the constant depth diving plate 1 has a force F acting on the wing plate 4 and a tensile force T of the towing line 2a.
and receives force P from the water flow. Considering the vertical balance of the constant depth diving plate 1, the force Pv that causes the constant depth diving plate 1 to sink due to the water flow - the vertical component of the force F acting on the wing plate 4 - the vertical component of the tensile force T of the towing line 2a The force becomes Tv, and the constant depth diving plate l is maintained in a balanced state at a certain water depth. When the slope of the wing plate 4 is large, the force F acting on the wing plate 4 becomes large, as shown in FIG. The diving depth of the diving board 1 becomes deeper.

If the cruising speed of the ship is increased without changing the slope of the wing plate 4,
The force Pv that sinks the constant depth diving board 1 increases due to the water current, and the diving speed of the constant depth diving board 1 becomes deeper.

When the inclination of the wing plate 4 is small, as shown in Fig. 5, the force F acting on the wing plate 4 is small, and therefore the force Pv that sinks the constant depth diving plate l by the water flow is small, and the constant depth diving is reduced. Board 1
The diving depth becomes shallower.

According to the above configuration, the scale plate indicates the desired ship speed.

By fixing the diving angle adjustment rod to the scale plate 5 in accordance with the desired diving depth, the wing plate 4 is set at a predetermined angle, and in this state, the constant depth diving plate 1 is towed at a desired speed. The constant depth diving board 1 can be submerged at a desired depth.

In this embodiment, the hook 6C is provided at the rear end of the diving angle adjustment rod 6, but it can also be attached to any location on the wing plate 4.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to make the diving board dive to the target fish swimming depth on the day at a desired diving depth at any boat speed.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a deep diving plate according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main parts of the identification deep diving plate, Fig. 3 is an explanatory diagram of the use state of the identification deep diving plate, and Fig. 4 5 is a state diagram when the diving depth of the constant depth diving plate is deep, FIG. 5 is a state diagram when the diving depth of the constant depth diving plate is shallow, and FIG. 6 is a perspective view of a conventional diving plate. DESCRIPTION OF SYMBOLS 1... Constant depth diving plate according to an embodiment of the present invention, 3... Towing slope, 4... Wing plate, 5... Scale plate, 6... Diving angle adjustment rod.

Claims (1)

[Claims] A wing plate is rotatably supported at the rear end of a towing plate that is towed by a boat and carries fishing gear backwards under tension, and a scale board with numerical values for boat speed and diving depth is hung above the towing plate. A constant depth diving plate characterized in that one end of a diving angle adjusting rod extending in the direction of the scale plate is fixed to the wing plate, and the other end is fixedly attached to the scale plate.