JP4435899B2 - Depth gauge - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a depth gauge that simply and quickly measures the depth of a target place in fishing.
[0002]
[Prior art]
Knowing the water depth is an important factor in fishing. To determine the depth of the water, you can decide by measuring the distance of the line that you have attached to the fishing line with the weight of the fishing line and letting it go out. The method is being used.
[0003]
[Problems to be solved by the invention]
Although the method of determining the water depth by measuring the distance between the line that is attached to the fishing line and bottomed out and then fed out is very simple, there are the following problems.
It is not impossible if it is an environment where you can operate the thread vertically toward the sea floor like boat fishing, but when you are throwing far away from quay, sandy beach or river shore such as carp fishing or river fishing It is impossible to determine the water depth only by the length of the thread that is fed out.
[0004]
The sonar has a certain extent in the measurement range, but it has a restriction of directing from the ship to the bottom to measure the reflection time of the control object. It is difficult to measure the depth of water at a horizontal distance from the shore. In addition, the sonar is an electronic device composed of an ultrasonic transmission / reception and a waveform analysis system, so the apparatus is large, expensive, vibration, shock, weather resistance and operation is not simple.
[0005]
The problem to be solved by the present invention is to make it possible to measure the water depth even at a distance in the horizontal direction, to make measurement operation easy, easy for anyone to handle, and easy to carry.
[0006]
[Means for solving the problems]
The main structure of the depth gauge according to the present invention will be described with reference to the drawings.
First, a transparent member that is not easily deformed by the water pressure at the measurement depth is used as the material of the frame (1), and a thin tube path (2) is opened in a bag shape from one direction in the frame (1). ) Is opened outside the frame (1). Alternatively, a transparent glass tube or a transparent hard plastic tube with one sealed may be supported by an opaque frame and the other end opened to the outside. As a member forming the narrow pipe passage (2), it is preferable to use a transparent material in which the amount of the liquid that has entered there can be confirmed with the naked eye. The cross-sectional shape of the narrow pipe path may be a perfect circle that is easy to process, but an ellipse or a rectangle is advantageous in terms of the recognizability of the display body.
[0007]
Next, in the vicinity of the opening (2a) of the frame (1), a notched window (5) is cut out so as to smooth the entry and exit of water.
A check valve (3) shown in FIG. 6 and a manually operated on-off valve (4) are provided in parallel in the path of the narrow pipe line near the opening (2a). The check valve (3) is closed in the direction from the air trap side to the opening (2a) as shown in FIG. The on-off valve (4) is always in a “closed” state unless operated from the outside.
[0008]
On the other hand, as shown in FIG. 12 , a scale (8) for dividing the water depth is provided on the surface of the frame (1) along the narrow channel (2). Then, a weight (10) having a sufficient weight is coupled to the lower portion of the frame as shown in the drawing in order to give posture control and directionality in water and to quickly settle the bottom. A hook (11) for connecting fishing lines may be provided at the upper end of the frame (5).
[0009]
Also, as shown in FIGS. 11 and 12 , an ink bag (15) made of a flexible material such as a rubber material is connected to the opening (2a) of the narrow tube path so as to communicate with the narrow tube path. ) May be filled with ink. The ink has a capacity from the ink bag (15) to the check valve (3) and the on-off valve (4) under atmospheric pressure, and the remaining part of the narrow pipe (2) is kept under normal pressure air. The ink bag (15) is exposed in water so that the water pressure acts directly.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, the action in water will be described.
When the structure with the inside of the narrow pipe passage filled with air as shown in FIG. 1 is thrown into the water, it sinks to the bottom of the water with the hook (11) upward and the weight (10) downward.
The air (13) in the narrow pipe (1) is cut off from the atmosphere and is in a state where water pressure is applied. And the water pressure which acts while the depth gauge sinks increases in proportion to the water depth. This water pressure compresses the air in the narrow pipe line (1) from the opening (2a) because the frame is rigid.
The relationship between water depth and water pressure is generally 0.1 kgf / cm2 (9.8 × 103 Pa) when the water depth is 1 m, and the water pressure is proportional to the depth. Although some errors occur depending on the water temperature, there is no practical problem.
[0011]
When air is compressed at a constant temperature, the volume decreases in inverse proportion. Accordingly, the water acting on the opening (2a) enters the narrow pipe (2) by an amount equal to the volume of the compressed air (13) of the narrow pipe (2). Since the on-off valve (4) is in the “closed” state, water enters through the check valve (3) side.
[0012]
When the water reaches the bottom, the water pressure P becomes constant, so that the pressure of the water pressure acting on the opening (2a) and the pressure of the air pressure in the narrow pipe (2) eventually reach an equilibrium state, and water intrusion stops.
If the water temperature is constant, the amount of water in the narrow pipe (2) does not increase and remains constant unless the water depth increases.
[0013]
Next, when the depth gauge is pulled upward, the water pressure acting on the opening (2a) decreases in proportion to the water depth, so that the water that has entered the narrow pipe (2) is pushed by the compressed air pressure at the time of bottoming. The flow is directed to the check valve (3) because the on-off valve (4) is in the “closed” state, and as a result, is interlocked by the check valve (3).
[0014]
Interlocking the narrow pipe means that the water and air in the narrow pipe are unexpectedly discharged by the water flow and vortex generated in the opening (2a) of the narrow pipe while the depth gauge is being pulled upward. The problem will end.
[0015]
And it takes out out of water to air | atmosphere, and reads the water level of the permeation | transmission narrow channel with the display scale (8) provided in the surface.
Here, in the allocation of the scale of the frame, even if the depth and the amount of water intrusion are plotted on a normal pipe, the scale (8) for dividing the depth as shown in FIG. 9 is not arranged at regular intervals. In order to make the water level correspond to the uniform scale as shown in FIG.
1) Divide the maximum depth value by an arbitrary number of scales to find the depth value at each scale position.
2) Obtain the water pressure corresponding to each depth value.
3) Find the corresponding amount of water intrusion from the water pressure on the scale, and find the amount of water increase (volume) for each scale.
4) Divide the increment of water on each scale by the unit distance of the scale to find the diameter of each scale on the narrow pipe.
5) Continuously connecting the obtained diameters of the graduations to form a narrow pipe line.
[0016]
As shown in FIG. 8 , when the on-off valve (4) is pushed, the valve port (4b) is moved and the on-off valve (4) is "open". Will be ejected.
[0017]
In the method of sealing together with ink and air in FIG. 12, the water pressure compresses the ink bag (11), so that the ink flows through the check valve (3) and enters the narrow pipe (2).
Since “the operation of the check valve / opening / closing valve and the relationship between the water pressure and the infiltration of the ink” are the same as those described so far, they will be omitted, but such a narrow tube (2) is completely sealed. Has the following advantages.
{Circle around (1)} The measurement value is stable because the ratio of the amount of air and ink in the narrow pipe is fixed.
{Circle around (2)} There is no risk of foreign matter entering the narrow conduit or valve body.
(3) The function of the valve element and the separation from the air can be improved by changing the ink composition and viscosity.
(4) Ink is more discriminating than water.
[0018]
【Example】
There are two types of depth gauges: a type in which the narrow pipe is opened and water is measured, and a type in which air and ink are sealed in an ink bag.
Overall dimensions are width = 10 mm, total length = 80 mm, thickness = 6 mm The total weight is about 100 grams including weight.
The frame was made of a transparent acrylic resin plate, the diameter of the narrow tube entrance was φ1.8, and the cross-sectional shape was a perfect circle. As for the depth scale, the minimum scale was set to 0.5 m, and the water depth measurement range was set to 0.5 m to 10 m. FIG. 10 shows the relationship between the position of the depth scale and the segment diameter of the narrow pipe in this embodiment. Lead was used as the material of the weight (6).

[0019]
A commercially available rubber bag was used as the ink bag. To fill the ink, first, a nipple joint for coupling with the opening is coupled to the ink bag, and the inside of the nipple joint is completely filled while preventing air from entering the ink bag.
On the other hand, the space between the pipe line leading from the opening part of the narrow pipe line to the check valve and the on-off valve was filled with ink, and the opening part and the nipple joint of the ink bag were joined so that air could not enter.
[0020]
To check the operation of the depth gauge, use a thread marked with the actual size corresponding to the depth value of the scale, tie a depth gauge to the tip of the thread, and sink it into the water from the quay of the port. Check and adjust while recording the yarn length.
The resulting depth gauge was replaced with this depth gauge from the weight used to replace the kissing scale, and it was thrown far from the sandy beach toward a predetermined point offshore to attempt use in actual fishing. Although we tried using a near point of about 20m and a far point of 50m and 80m as points, the long-throwing operation was no different from the usual kiss-throw fishing sensation. By continuously changing the direction several times and making long-distance castings, we were able to grasp the rough undulations of the seabed and the depth of the points in units of 0.5 m.
[0021]
【The invention's effect】
The following effects were recognized in the depth gauge of the present invention.
1) It is possible to know the depth to the bottom of the water accurately on the spot.
2) Accurate depth can be obtained regardless of the amount of thread feed.
3) It can also be used as a substitute for a weight for a kiss balance.
4) Because it is small, it can be carried in the corner of a fishing box.
[Brief description of the drawings]
FIG. 1 is an internal explanatory diagram of a depth gauge showing the basic main structure of the present invention. FIG. 2 is an internal explanatory diagram showing a main structure of a check valve (3). FIG. 3 is a check valve at the time when the water depth increases. Internal explanatory diagram showing the state of (3) [FIG. 4] Internal explanatory diagram showing the state of the check valve (3) when the water depth decreases [FIG. 5] of the check valve (3) and the on-off valve (4) Internal explanatory diagram showing the main structure [FIG. 6] Internal explanatory diagram showing the state of the check valve (3) and the on-off valve (4) when the water depth increases [FIG. 7] Check valve (3 when the water depth decreases ) And an internal explanatory diagram showing the state of the on-off valve (4) [FIG. 8] An internal explanatory diagram showing the state of the check valve (3) and the on-off valve (4) when discharging water or ink [FIG. 9] Normal FIG. 10 is a diagram illustrating the relationship between the position of the depth scale and the segment diameter of a narrow pipe line according to the present embodiment. View the whole showing a display state of the measurement point in the depth meter in the case of enclosed air and ink in the illustration [12] The present invention showing the main structure of the depth gauge when encapsulating air and ink EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Frame 2 Narrow pipe line 2a Opening part 2b Narrow pipe line which leads to an air pocket 2c Narrow pipe line which leads from an opening part to a non-return valve 2d Narrow pipe line which leads from an opening part to an on-off valve 2e Narrow pipe line which leads from an air pocket to an on-off valve 3 Reverse Stop valve 3a Taper line 3b Sphere 3c Net plate 3e Passage 4 Open / close valve 4a Push button 4b Valve port 4c Spring 5 Notch window 6 Weight 7 Hook 8 Display scale 9 Number 10 Water 11 Ink bag 12 Ink 13 Air 14 Narrow pipe segment diameter

Claims (1)

In a depth gauge that can measure the depth of the bottom of the water from the amount of water entering by the water pressure, a check valve (3) and an on-off valve (4) are connected in parallel to the water ingress port side, A depth gauge characterized in that 4) can be opened and closed from the outside of the frame.

Images