JP5629862B2 - Depth gauge - Google Patents

Description

 The present invention relates to a depth gauge that simply and quickly measures the water depth at a place where a device is inserted in fishing.

Patent No. 4434599 is a method for easily knowing the water depth position of the device in fishing.

Announcement of Patent No. 4434599

The depth meter of Patent No. 4345899 has a simple structure, small size and light weight, so it is small in weight and easy to use as a part of the device. Moreover, since the operation is simple, the load on the fishing action is extremely small.

This method is characterized in that the water pressure at which the depth gauge is positioned is maintained and the water level that is balanced with the air pressure of the air chamber (13) in the atmosphere is read on the depth scale. Such a measurement method must sufficiently ensure the safety of the instrument against high pressure maintenance. Insufficient strength may make it impossible to damage the depth gauge due to deformation or rupture of the water pipe, and there may be dangers to the operator. Also, if they are abandoned at high pressure on the beach, etc., they may be dangerous. It may be necessary to take into account that unexpectedly large depth pressure (water depth) may be picked up depending on how the self-holding device is handled. In such a case, it seems that the strength selection based on the material selection and shape of the pressure load section is insufficient.

The mechanism of the depth gauge according to the present invention will be described with reference to the drawings. The contents of symbols used in the waterway circuit diagrams of FIGS. 12 to 17 are as follows.
Pa = Atmospheric pressure Pn = Shallow water pressure (small depth)
Pb = deep water pressure (high depth)
Pe = Restoring pressure of rubber plate and spring
Hb = water level at deep Pb

Next, the basic mechanism will be described with reference to the drawings . As shown in FIGS. 1 to 3 , an air reservoir chamber (16) is provided at the outermost end (13a) of a conventional depth gauge so as to be in conduction with the air chamber. deep. In connecting the air reservoir chamber (16) to the main body, an open mud (15) may be provided in the main body so that the air reservoir chamber (16) can be exposed to water. For the expansion / contraction plate (16a) of the air retention chamber, a material having a resilience and flexibility such as a rubber material or an elastomer material in a shape such as a disk or a bellows is preferable. Further, the expansion plate (16a) on the disk and the frame (1) can be joined by directly sticking only the outer peripheral edge of the expansion plate (16a) with a confidential adhesive as shown in FIG. As shown in FIG. 8, an air reservoir chamber base (21) is provided, and the elastic plate (16 a) is adhered to the base plate and the outer periphery is fastened with a band.

And at the time of this connection, it is good to give preliminary tension to an expansion-contraction board (16a). When the internal pressure does not act, the capacity of the air reservoir chamber (16) is minimized by always guaranteeing close contact with the base by the restoring force of the material itself. When the elastic plate (16a) as shown in FIG. 3 is a bellows type, the bellows elastic plate (16a) is hermetically joined to the frame (1), and then the head of the bellows is attached to the frame (1) with a spring (16b). To ensure close contact. When the air reservoir chamber base (21) is provided, maintenance is improved and reliability is improved by making it possible to attach and detach the outermost end portion (13a) of the air chamber by screw connection or the like as shown in FIG.

On the other hand, the air reservoir chamber (16) may be configured so as to maintain a constant gap as in the gap portion (16a) of FIG. However, when providing a gap, it is necessary to include the volume of the recess as the volume of the water level pipe.

In addition, you may make it this air reservoir chamber (16) always apply a fixed pressing pressure with the spring (16b) from the outside like FIGS. 3-5, FIG. The spring (16b) is pushed from above the telescopic plate so that a constant external pressure is always applied to the air reservoir (16).
By selecting an appropriate spring, the strength of the relief can be easily fixed and the reliability as a safety device is improved. Then, as shown in FIG. 10, if the adjusting screw (16e) is provided, the repulsive force of each spring can be adjusted, and the reliability and productivity are further improved stably.

Next, the operation of such a mechanism will be described with reference to basic circuit diagrams (FIGS. 12 to 16). FIG. 12 shows a standby state before entering the measurement in the depth gauge of the present invention shown in FIG. The narrow pipe line (2) in the atmosphere is filled with gas (air), and the pre-tension "Pe" of the expansion and contraction plate (16a) acts in the air reservoir chamber (16), and its internal volume is at a minimum value. The on-off valve (4) and the check valve (3) are in a “closed” state, and the opening (2a) of the narrow pipe is open to the atmosphere.

When such a depth gauge is thrown into the water and sinks, water enters the narrow pipe (2) from the opening (2a) through the check valve (3) by the action of the water pressure “Pb” as shown in FIG. This action continues until it balances with the air in the capillary. At this time, the internal volume of the air chamber (16) does not change from the outer surface by the action of the water pressure Pb and the pretension Pe. Here, when the water level settled at the bottom or at an arbitrary depth is “Hb”, the pressure of the air chamber (13) at this time is equal to “Pb”.

Next, when the water depth starts to rise, the water depth becomes shallow, so the water pressure “Pb” changes to “Pn” as shown in FIG. “Pn” is “Pn> Pb”. Here, since the water level “Hb” is interlocked by the check valve (3), the water level “Hb” does not change as it is. The pressure of the air chamber (13), which is “Pb”, decreases the external water pressure of the air reservoir chamber (16) from “Pb → Pn”, so the volume of the air reservoir chamber (16) increases by “Pb−Pn”. The pressure in the air chamber (3) is reduced.

Even if the sedimentation is continued again from this point in time and the water pressure reaches “Pb”, the air reservoir chamber (16) is contracted by the water pressure, so that the water is not infiltrated from the opening (2a) through the increase of the air pressure. When the sedimentation further increases, the water level “Hb” increases in a proportional manner in proportion to the depth in the form shown in FIG.

FIG. 15 shows a circuit configuration at the time when a depth gauge that has reached the bottom or an arbitrary depth is taken into the hand (in the atmosphere). Since “water pressure = 0”, the internal pressure of the air chamber (13) is subjected to the preliminary tension “Pe”. Since the water level “Hb” is interlocked by the check valve (3), no change occurs. Accordingly, the volume of the air reservoir chamber (16) is further expanded to “Pb-Pa”, so the pressure of the air chamber (13) is reduced accordingly.

FIG. 16 shows the “return” operation for returning the water level to 0 point after reading the depth scale. By opening the on-off valve (4), the ingress water is discharged to the opening (2a) by the pretension "Pe" and the water level returns to the 0 point. At this time, the volume of the air chamber (16) is "minimum" The depth gauge will return to the initial state.

The reservoir type water depth gauge in which the ink is sealed is basically the same as the above description in terms of the intended function. FIG. 17 shows the water channel circuit diagram. An air reservoir chamber (16) is provided inside an ink reservoir (17), which is a reservoir, and this is coupled to the outermost end (13a) of the air chamber in a circuit. Since the water pressure acts directly on the ink reservoir (17), the other components including the air reservoir (16) are the same as those already described.

In the conventional type, the greater the measurement depth, the higher the pressure, causing the check valve to leak and the water level to vary. The depth gauge provided with the air reservoir according to the present invention is always at a low pressure, so there is no such problem. Moreover, since measurement can always be performed at a low pressure, the depth gauge can not be used due to deformation or rupture of the water pipe due to insufficient strength, and the danger of injury to the operator can be eliminated. In addition, the constant low internal pressure increases the degree of freedom in the design of the main body, so it seems to greatly contribute to simplification of manufacturing technology and reduction of manufacturing costs.

FIG. 1 is an internal explanatory view showing a main structure of a depth gauge according to the present invention, which is a type in which a disc-shaped elastic plate (16a) is attached to an air reservoir. Example 1 FIG. 2 is a partial explanatory view showing an AA arrow portion in FIG. Example 1 FIG. 3 is an internal explanatory view showing the main structure of the depth meter of the present invention. Example 1 FIG. 4 is a partially enlarged cross-sectional view showing a measurement standby state at a portion B in FIG. Example 1 FIG. 5 is a partially enlarged cross-sectional view showing the expansion of the air chamber (16) when the main body is raised in the water of FIG. Example 1 FIG. 6 is an internal explanatory view showing a main structure of a reservoir type depth meter using an air reservoir chamber as an attachment type according to the present invention. (Example 2) FIG. 7 is a partially enlarged view showing a portion A in FIG. (Example 2) FIG. 8 is an explanatory view of the inside of the attached air chamber base of the present invention before measurement. (Example 2) FIG. 9 is an explanatory view of the interior of the air reservoir chamber base of the present invention that is made into an attachment when the air is expanded. (Example 2) FIG. 10 is an explanatory diagram of the interior of the air retention chamber base of the present invention which is attached using a spring. (Example 2) FIG. 11 is an explanatory diagram of the interior of the air reservoir chamber base of the present invention that is attached using a gap. (Example 2) FIG. 12 is an explanatory diagram of a circuit diagram showing a state before measurement (standby state) of the depth meter of the present invention shown in FIGS. Example 1 FIG. 13 is an explanatory diagram of a circuit diagram showing a measurement state (immersion) in water of the depth gauge of the present invention shown in FIGS. 1 and 3. Example 1 FIG. 14 is an explanatory diagram of a circuit diagram showing a case where the water depth gauge of the present invention shown in FIGS. 1 and 3 moves to a shallower water depth during underwater measurement in FIG. Example 1 FIG. 15 is an explanatory diagram of a circuit diagram showing a point in time when the depth gauge of the present invention shown in FIGS. Example 1 FIG. 16 is an explanatory diagram of a circuit diagram showing a case where the water level is reset in the depth gauge of the present invention shown in FIGS. Example 1 FIG. 17 is an explanatory diagram of a circuit diagram showing a measurement state (immersion) in water in the case of the reservoir method which is the depth gauge of the present invention shown in FIG. (Example 2)

When reading the depth in the atmosphere, the purpose of reading the depth safely while always reducing the pressure of the air chamber (13) regardless of the measurement depth is to be added to the air reservoir (16) at the tip (13a) of the air chamber. ) And the water pressure is applied to the outer surface of the air reservoir chamber simultaneously with the opening (2a), so that the pressure of the air chamber (13) can be lowered to a low pressure while always balancing regardless of the measurement depth. It was realized that depth reading can be performed safely.

In Example 1, the air reservoir chamber of the present invention is used for a depth gauge of the type that measures the amount of infiltrated water (water level), and FIGS. 1 and 3 show that the air reservoir chamber (16) is an air chamber. an internal explanatory diagram showing the main structure of the depth gauge of the present invention which is provided in the endmost (13a), 2 4 B enlarged description of FIG. 3 in a-a section view along arrow of FIG. 1 FIG. 5 is a partially enlarged cross-sectional view showing the expansion of the air chamber (16) when the main body is raised in the water of FIG.

Since the basic mechanism and operation of the embodiment shown in FIGS. 1 and 3 have already been described in “Means for Solving the Problems”, they are omitted here. In such a configuration, first, a large-scale water depth gauge was prototyped on a quadruple scale for operation confirmation, and a water tank test was attempted, and the expected conclusion was obtained. Based on this verification, we made a practical model depth gauge and tried each long throw test. The total number of samples is 14 for each of the 7 types shown in FIG. In addition, seven conventional depth gauges (Patent No. 4345899) were prepared for the long throw test, and the troubles, ease of handling, performance, etc. among the three parties were compared. In particular, there were no operational problems for all three. However, when the depth measurement was over 50m, the “return” operation to return the water level to 0 point felt the danger that the conventional type suddenly splattered the squirting water, but the type shown in FIG. 1 and the type shown in FIG. There was nothing that could be confirmed.

On the other hand, in the performance test, when the water depth gauge was used and the water level was read, a variation test was performed. Was. The average and variation of the reading depth value at a depth of 100 m showed a large variation value of “58.6 m, σ = 14.0”. On the other hand, the group according to the first embodiment of the present invention (the type shown in FIG. 1 and the type shown in FIG. 3) had a reading depth value of “98.6 m, σ = 1.4” and was very close to the true value and stable. However, this value is an evaluation value of all 14 types in FIG. 1 and FIG.

Example 2 is used for a depth meter of the type in which ink is housed and the depth is measured by the water level of the ink, and FIG. 6 shows the main structure of the depth meter of the present invention in which the air reservoir chamber is provided as an attachment type. It is explanatory drawing. FIG. 7 is a partially enlarged view showing a portion A in FIG. FIG. 8 is an internal explanatory view before measurement of the air chamber base (21) of the present invention attached as shown in FIG. 6, and FIG. 9 is an internal explanatory view at the time of air expansion in FIG. FIG. 10 is an explanatory diagram of the interior of the air reservoir chamber base (21) of the present invention that is attached using a spring. FIG. 11 is an air reservoir chamber base (21) of the present invention that is attached using a gap. FIG.

Next, the structural mechanism of the embodiment of FIG. 6 will be briefly described. A narrow pipe passage (2) is provided inside the frame (1) of the main body, and an ink reservoir (17) is provided on the side surface of the frame (1) in parallel therewith. The frame (1) may be entirely constructed of a transparent material, but the subframe (1a) is provided as shown in FIG. 6 and only that portion is made of a transparent material to form a pipe line portion. Airtight joining may be used. A depth scale for the water level is formed on the outer surface of the integrated frame or subframe (1a) in correspondence with the position of the narrow pipe passage (2) at the position of the depth scale display surface (1b) in the figure as in the prior art. .

In the pipeline gallery, a check valve (3) is provided in the narrow pipeline (2) and the tip is opened in the ink reservoir (17). In parallel with the check valve (3), an open / close valve port (4b) serving as a bypass line is provided from the narrow pipe (2) to the ink reservoir (17) and opened to the ink reservoir (17).

Then, a hinge is provided on the ink reservoir (17) side of the frame (1) or the sub frame (1a), and the on-off valve frame (4) is rotatably engaged with the pin (4f). A valve element (4a) is provided in the opening / closing valve frame (4) at the position of the opening (2a). The end in the installation direction is shared as a push button (4d). Further, a hole is made in the frame (1) so that this portion can intervene as a push button, and an outer cover plate (4e) is hermetically bonded with an adhesive or the like to the outer surface portion of this hole. The on-off valve frame (4) is provided with an on-off valve spring (4c) between the on-off valve frame (4) and the valve element (4a) closes the on-off valve port (4b) by this action. deep.

The air chamber (13) of the narrow pipe is opened at the tip to the ink reservoir (17). The air reservoir chamber base (21) is attached to the outermost end (13a) of the air chamber with a screw or the like. (1a) is hermetically coupled to form an air reservoir (16).
The ink reservoir (17) seals and joins the partition plate (18) to the guide surface of the frame (1) with an airtight adhesive. The partition plate is preferably made of a highly flexible material such as rubber or an elastomer material. .

And with such a configuration, we made this type of depth gauge and tried each long throw test. The number of samples was 7 as in the example. The conditions for the long throw test are the same as in the first embodiment. However, no operational trouble was found. Even when the “return” operation was performed to return the water level to 0, it was completely quiet and there were no abnormalities in all seven units.
The performance test was performed under the same conditions as in Example 1. In the variation test of the reading value at the depth of 100 m, the reading depth value is “99.0 m, σ = 1.2”, which is equivalent to the type of FIG. 1 and the type of FIG. It turned out to be stable soon.

The depth meter of the present invention is safe and always memorizes the maximum depth at the time of measurement, and since it does not require a power source and can be operated semipermanently, in addition to fishing portable equipment, diving sports such as diving Or underwater workers can carry it as a portable device during diving, and can check their own diving action, and if it is installed in floating facilities related to fisheries installed in the water, it is possible to easily know the impact of storm surges etc. The use application to the industrial field as a simple depth meter of the present invention is wide.

DESCRIPTION OF SYMBOLS 1 Frame 1a Sub-frame 1b Depth scale display surface 2 Narrow pipe line 2a Opening part 3 Check valve 3a Valve seat 4 On-off valve frame 4a Valve body 4b On-off valve port 4c On-off valve spring 4d Push button 4e Outer plate 4f Pin 5 Notched window 6 Weight 7 Hook 12 Ink 13 Air chamber 13a End of air chamber 15 Open mud 16 Air pool chamber 16a Telescopic plate 16b Spring 16c Spring seat 16d Spring retainer 16e Adjusting screw 16f Gap 17 Ink reservoir 18 Interval plate 19 Main mud 20 Presser plate 21 Air retention chamber base

Claims (2)

An air reservoir chamber (16) is provided by sealing and sticking the extreme end (13a) of the air chamber with an elastic plate (16a), and the air reservoir chamber (16) is exposed to the same underwater atmosphere as the opening (2a). While maintaining the maximum water level (maximum depth) while always propagating the depth change in the water to the water level of the narrow pipe (2), the air pressure in the air chamber (13) is always opened in the depth gauge. A pressure reducing system for a self-holding depth gauge, wherein the pressure is reduced to near the water pressure (atmospheric pressure) of the section (2a). In a depth meter that makes it possible to measure the depth of water from the amount of water entering by water pressure, an ink reservoir (17) is provided on the side surface of the frame (1), and the ink (12) is covered with the ink (12). (18) is hermetically sealed, and one surface of the cover plate (18) is exposed to water, and at the end of the narrow pipe (2), from the narrow pipe (2) to the ink reservoir (17). An open / close valve port (4b) that can be opened and closed in parallel with the check valve (3) is opened, and an air reservoir chamber (16) is provided at one end on the opposite side of the narrow pipe (2). A water depth meter characterized by exposing the water to the ink reservoir (17).

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