JP2765548B2 - Variable depth buoy - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable depth buoy, and more particularly to a buoy which floats on the surface of the sea, suspends an underwater part as a data acquisition sensor with a hanging cable, and collects marine environment data at a desired sinking depth. The variable depth buoy that performs.

[0002]

2. Description of the Related Art As shown in FIG. 7, a buoy for measuring marine environment data such as water temperature, salinity, and underwater acoustics in the sea floats on the water surface, suspends the A floating section 101 having an antenna 1001 for transmitting the data acquired in the form of radio waves in a predetermined format, an underwater section 103 having a data acquisition sensor suspended at a specified depth in water and measuring marine environment data, While connecting the unit 101 and the underwater unit 103 to secure a signal transmission path,
And a suspension cable 102 that forms a power transmission path as required.

The information that can be collected by such an environment measurement buoy is limited to data at the suspended depth of the underwater section 103, and is usually limited by the length of the suspended cable 102.
Against this background, the following three methods are generally used to acquire marine environment data at an arbitrary depth. The first method is a method of sequentially measuring data while the suspension cable is being extended, that is, in a state where the depth of the underwater part is changing every moment, in order to collect data at the depth during the sinking.

In the second method, in order to measure at a specific depth for a long time, the entire length of the suspended cable is divided into a plurality of parts in advance, and a plurality of limited depths are determined by which section the cable is fed out. How to choose about
154996).

In a third method, as shown in FIG. 8, a suspension cable 1 is used to stop an underwater part at an arbitrary depth.
02 covered with cushioning material 105
04, which has a configuration capable of crimping and clamping, and a method of deforming the bidirectional shape memory alloy 104 by applying a depth signal to crimp and clamp the hanging cable 102 and stopping the extension of the hanging cable 102 (actual opening) No. 64-48686).

[0006]

The above-mentioned conventional depth setting method has various problems as described below. The first problem is that when the structure is such that a plurality of depths can be set by dividing the suspension cable as in the first method, the depth cannot be completely adjusted to an arbitrary depth. The reason is that the depth of the underwater part is limited by the length of the suspended cable, and the depth of the underwater part does not always match the length of the suspended cable because the underwater part is caused to flow by a tidal current or the like.

A second problem is that the structure becomes complicated when the suspension cable is divided into a plurality of portions in order to increase the number of settable depths as in the second method. The reason is that a mechanism for switching whether to continue or stop feeding is required for each position at which the suspension cable is divided into a plurality.

A third problem is that, in a configuration in which a part of a suspended cable is crimped and held with a shape memory alloy or the like as in the third method, the suspended cable is easily damaged. The reason is that the suspended cable is insulated from the surrounding seawater with a very thin coating, so the coating may be broken if it is crimped and pinched from the outside of the jacket with the force of a shape memory alloy or the like and suddenly stopped. When a sudden stop occurs, a large impact force is applied to the connection between the underwater part and the suspension cable, and the possibility of disconnection increases.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a variable depth buoy capable of suspending an underwater part at an arbitrary depth and capable of smoothly stopping the underwater part without causing damage to a suspended cable.

[0010]

SUMMARY OF THE INVENTION The present invention is directed to the above objects.
To achieve the following, the following means configuration is provided. That is, depth possible
The first configuration of the present invention relating to a strange buoy is marine environment data.
And a transmission path of a signal to the underwater part
And a suspension cable for securing the underwater part to the suspension cable.
Floating on the sea suspended by a bull and transmitting marine environment data by radio
Marine environment data is assigned to the underwater
It is possible to measure at the desired suspension depth
A variable depth buoy with (a) and
It has each configuration of (b). (B) The stretching and restoring by applying and releasing the external force
Having a cylindrical outer shape made of a flexible elastic member,
Or the suspension cable is provided on the floating
Insert one end of the cylindrical outer shape into the cable storage section for easy storage.
And the suspension cable is allowed to freely penetrate inside,
When a predetermined external force is applied to the other end of the cylindrical outer shape, the other
At the end, hold the suspension cable tightly, and
With the extension of the bull, it is stretched against self-elasticity
The suspension cable is pulled by the reaction force generated by this extension.
(B) At all times, the tension in the circumferential direction is applied and the gripping elastic body is
The other end of the cylindrical outer shape of the body is naturally joined to the inside
Freely penetrate the suspension cable and apply the tension
When it is removed, it contracts in the central axis direction and
The predetermined external force is generated against the other end of the cylindrical outer shape, and
Shrinking elastics for tightening the suspension cable together with the gripping elastic body
And the contractile elastic body always apply the circumferential tension.
Predetermined depth applied and provided by depth sensor
The circumference based on information or a predetermined depth water pressure to be applied
A tension application release structure for releasing the application of tension in the direction
WasShrink mechanism Also, a second variable depth buoy of the present invention
The configuration includes an underwater section for acquiring marine environment data, and the underwater section.
Cable to secure the signal transmission path to the
The underwater part is suspended with the above-mentioned suspension cable and floats on the sea.
Ocean environment data by radio wave transmission
Measure data at any suspension depth in the underwater
A variable depth buoy characterized by being made possible
(A) and And (b). (B) The stretching and restoring by applying and releasing the external force
Having a cylindrical outer shape made of a flexible elastic member,
Or the suspension cable is provided on the floating
Insert one end of the cylindrical outer shape into the cable storage section for easy storage.
And the suspension cable is allowed to freely penetrate inside,
When a predetermined external force is applied to the other end of the cylindrical outer shape, the other
At the end, hold the suspension cable tightly, and
With the extension of the bull, it is stretched against self-elasticity
The suspension cable is pulled by the reaction force generated by this extension.
Elastic body that suppresses sedimentation (B) Normally, the other end of the cylindrical outer shape of the gripping elastic body is naturally
The suspension cable freely penetrates inside
The hanging cable has an inside diameter that shrinks when heated.
A heat-shrinkable cylindrical heat-shrinkable body
Predetermined depth provided by a depth sensor with a heat shrink
A heating structure that causes heat shrinkage based on information.
Compression mechanism

[0011] A third configuration of the present invention is the above-mentioned first or second embodiment .
Keru All the second configuration instead of gripping the elastic body, cylindrical gripping elastic body formed by heat-shrinkable resin member having elasticity
And contraction in said first or second configuration
In place of the mechanism, a heating mechanism is provided which includes a heating element which is closely attached to the outer periphery of the gripping elastic body and generates heat in response to input of predetermined depth information provided by a depth sensor. Each time the predetermined depth information is input, the gripping elastic body is heated by the heating mechanism to cause thermal contraction, thereby stopping the sinking of the suspension cable.

According to a fourth aspect of the present invention, there is provided the first or second aspect of the invention .
In second configuration, the bunch lifting elastic body, and has a structure formed by a cylindrical elastic body.

[0013] A fifth configuration of the present invention is the above-mentioned first or second embodiment .
In second configuration, bunch the lifting elastic body, in which the outer shape is formed by an elastic body which is arranged to mesh cylindrical.

According to a sixth aspect of the present invention, there is provided the first or second aspect of the invention .
In second configuration, bunch the lifting elastic body, in which the outer shape is formed by an elastic body which is arranged in a spiral-like cylindrical shape.

The seventh configuration of the present invention, in the first configuration, the shrinkage mechanism, a cylindrical shrink elastic material having an inner diameter of tightening the suspension cable in nature, to the reduced elastic body A plurality of hooks engaged with the shrinkable elastic body and a plurality of actuators for expanding / shrinking the hooks in the radial direction so as to always apply a tension in the radial direction to provide an inner diameter that allows the suspension cable to freely penetrate. It is formed by a tension pulling / releasing structure.

The eighth aspect of the present invention, in the first configuration, the shrinkage mechanism, a cylindrical shrink elastic material having an inner diameter of tightening the suspension cable in nature, the contraction elastic body A hermetically sealed shape that has an inner diameter that allows the suspension cable to freely penetrate by being attached to the inner wall and expanding, and is crushed by seawater pressure at a predetermined sinking depth to tighten the suspension cable with the contractible elastic body. And a hollow annular structure.

[0017] In the ninth aspect of the invention, the first in the second configuration, the shrinkage mechanism has an inner diameter in nature to freely penetrate the suspension cable, the suspension cable and shrunk by heating A shrinkable elastic body formed of a cylindrical heat-shrinkable tube for tightening, and a heating element incorporated therein and tightly coupled to the shrinkable elastic body, and heating the shrinkable elastic body based on the predetermined depth information to thereby form the suspension cable. Is formed by a heating mechanism for tightening.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gripping elastic body connected to a contraction mechanism is configured so that a suspension cable contracts from its surroundings and comes into close contact during operation driven by the contraction mechanism. That is,
When the contraction mechanism crimps the suspension cable and tightens it,
The gripping elastic body is also stretched so as to be dragged by the suspended cable that is fed out, and the diameter of the gripping elastic body contracts based on the Poisson's ratio to grip the hanging cable closely from the surroundings. The underwater part can be smoothly stopped while gradually increasing its elasticity in response to the sedimentation. Further, in the stopped state, a wide range of the suspension cable can be gripped by the extended gripping elastic body, and an embodiment in which a single point load is eliminated and the suspension cable is not damaged can be secured.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of the variable depth buoy according to the first embodiment of the present invention. The embodiment shown in FIG. 1 comprises a floating part 1, a hanging cable 2, and an underwater part 3. Before use, the hanging cable 2 is placed in the floating part 1 or the underwater part 3, and in this embodiment, water is used. It is housed in a suspended cable housing part 5 provided in the middle part 3 in a coil shape that can be easily fed out. When this variable depth buoy is dropped on the sea surface, the levitation 1 provided with buoyancy sufficient to hang the suspension cable 2 and the underwater part 3 has an antenna 7.
When the suspension cable 2 stored in a coil shape in the underwater part 3 is extended and the underwater part 3 sinks down while the suspension cable 2 is fully extended, the underwater part 3 Stop sedimentation.

A cylindrical gripping elastic body 4 is connected adjacent to the suspension cable storage section 5 so as to surround the periphery of the extending portion of the suspension cable. The gripping elastic body 4 is shown in FIG.
As shown in (c), a cylindrical rubber-based or synthetic resin-based material that surrounds the suspension cable 2 using the cylindrical gripping elastic body 4a, the net-like gripping elastic body 4b, or the spiral gripping elastic body 4c. Of the elastic body. The inner diameter of the gripping elastic body 4 configured as an elastic body is larger than the outer diameter of the hanging cable 2 in a natural state, and has a structure that does not hinder the extension of the hanging cable 2, that is, the settling of the underwater part 3. Further, a cylindrical contraction mechanism 6 is coupled adjacent to the holding elastic body 4 so as to surround the suspension cable 2.

As shown in FIG. 3A, the contraction mechanism 6 makes the hook 61 extend the inner diameter of the elastic body 60 larger than the outer diameter of the suspension cable 2 in the natural state, and feeds the suspension cable 2 out. A structure in which the hook is removed using the actuator 62 in response to a signal from a depth sensor (not shown) disposed in the underwater section 3 and the tension applied to the elastic body 60 is released so that the elastic body 60 is contracted. as shown as the shrinkage mechanism in FIG. 3 (b), have been determined depth actuating advance, it is also possible to adopt a configuration that does not require electrical signal by the depth sensor.

That is, as a contraction mechanism also serving as a depth sensor, an elastic body 64 using rubber or the like is attached to the inside of a hollow annular structure 63 made of synthetic resin or metal with an adhesive or the like, and expanded. The annular structure 63 is configured to prevent the elastic body 64 from shrinking. The inner diameter of the elastic body 64 in the natural state is made smaller than the outer diameter of the suspension cable 2, while the thickness of the annular structure 63 can prevent the elastic body 64 from contracting before operation. In addition, a thickness that can be crushed by water pressure corresponding to the operating depth is set. With such a structure, when a predetermined depth is reached, the annular structure 63 is crushed by water pressure and cannot support the expanded state of the elastic body 64, and the elastic body 64 contracts and presses against the suspension cable 2. And lock it.

FIG. 3C shows another contraction mechanism.
As shown in FIG. 7, a heating mechanism 66 having a heating element such as a heating wire disposed on the outer periphery of a heat-shrinkable tube 65 using a synthetic resin member whose inner diameter is smaller than the outer diameter of the suspension cable 2 in the contracted state is closely attached. Then, the heat contraction tube 65 is thermally contracted by operating the heating mechanism 66 according to a signal from the depth sensor.

Next, the operation of this embodiment will be described with reference to FIG. In the state where the underwater part 3 is sinking, the gripping elastic body 4 and the contraction mechanism 6 are not in contact with the suspension cable 2, so the suspension cable 2
Will be delivered smoothly. This state is shown in (a) and (b) of FIG.

When the sinking depth reaches a predetermined depth, the contraction mechanism 6 starts contracting according to the depth information provided from the depth sensor. When the contraction mechanism shown in FIG. 3A is used for contraction of the contraction mechanism in this case, when the depth information reaches a predetermined depth set in advance, the actuator 6 contracts.
2 is performed by loosening the engagement of the elastic body 60 with the hook 61, and the operation of the actuators 62 is performed by an electronic circuit incorporated in each of the actuators 62 providing predetermined depth information from the depth sensor. Is applied.

The contraction of the contraction mechanism shown in FIG. 3C is achieved by the electronic circuit 661 attached to the heating mechanism 66 via a heat insulating material.
The operation is performed in such a manner as to operate by applying power to the heating element included in the heating mechanism 66. In the case of FIG. 3B, the ring-shaped structure 6 crushed at a predetermined depth is used.
The contraction operation is performed by the loss of the expansion force of the elastic body 64 due to the crushing of 3 itself. The predetermined depth information and depth corresponding to the contraction operation in this case are both set in advance in consideration of the operation response time of each contraction mechanism.

Since the inner diameter of the contraction mechanism 6 is smaller than the outer diameter of the suspension cable 2 in the operating state, the contraction mechanism 6 comes into contact with the suspension cable 2 and comes into close contact therewith. Accordingly, the contraction mechanism 6 starts moving as being dragged by the hanging cable 2 that is being extended. The gripping elastic body 4 provided adjacent to the contraction mechanism 6 is stretched in the longitudinal direction in accordance with the movement of the contraction mechanism 6, and the feeding speed of the suspension cable 2 gradually decreases. This state is shown in FIG. 4 (a) (at the time of gripping deceleration), (b) (at the beginning of gripping deceleration), (at the end of gripping deceleration).

The gripping elastic body 4 has a cylindrical shape using an elastic member such as rubber, and has a cylindrical, net-like or spiral structure that can be extended by applying an external force in the axial direction. Is not in contact with the suspension cable 2 in a natural state where no external force is applied.

However, when the gripping elastic body 4 is extended at one end by the movement of the contraction mechanism 6 and extends in the longitudinal direction, the gripping elastic body 4 contracts in the inside diameter and the outside diameter based on the Poisson's ratio and is crimped to the suspension cable 2. Become so. An elastic member such as rubber has a Poisson's ratio close to 0.5, and is one of the substances in which the inner diameter decreases most with an increase in the longitudinal dimension. Further, by making the shape of the gripping elastic body 4 into a net shape or a spiral shape, a change in elongation in the longitudinal direction can be changed to a change in contraction with a large inner diameter.

When a part of the gripping elastic body 4 comes into contact with the suspension cable 2, the gripping elastic body 4 is further extended by being dragged by the suspension cable 2, and the inner diameter of the gripping elastic body 4 is further reduced. 2, the seizing of the underwater part 3 can be finally stopped. This state is shown in (a) and (b) of FIG.

FIG. 6 shows the time change of the tension applied to the suspension cable in comparison with the case of the present invention and the case of the conventional example using a shape memory alloy. During the suspension cable extension period, almost no force is applied to both of them, and the underwater part sinks almost naturally. When depth information is obtained by the depth sensor and the suspending operation of the suspension cable is started, in the conventional example, the suspension cable is pinched by the shape memory alloy,
Since the feeding is suddenly stopped, a very large tension is applied to the suspension cable.

On the other hand, according to the present invention, it is possible to realize a smooth stop utilizing the extension of the gripping elastic body, and it is possible to prevent a large tension from being applied to the suspension cable. In the stopped state, it is necessary to support the mass in the underwater part. However, in the conventional example, since the suspension is supported by the limited portion sandwiched between the shape memory alloys, a concentrated load is applied to the suspension cable.

On the other hand, according to the present invention, since the gripping elastic body 4 grips a wide range of the suspension cable 2, the load applied to the suspension cable 2 is dispersed, and the disconnection due to the stress generated in the suspension cable 2. In addition, it is possible to prevent insulation deterioration or the like due to damage to the jacket of the suspension cable 2.

Next, a second embodiment of the present invention will be described with reference to the drawings. In the first embodiment described above, the gripping elastic body 4 and the shrinking mechanism 6 are separated from each other. However, as a second embodiment, as shown in FIG. In use, the heating mechanism 9 is provided around the gripping elastic body 8, so that the function of the gripping elastic body 8 and the function of the contraction mechanism are combined. That is, when the heating mechanism 9 is operated by the depth signal provided from the depth sensor, the gripping elastic body 8 itself starts contracting.

When the gripping elastic body 8 contracts and comes into pressure contact with the suspension cable 2, the gripping elastic body 8 is dragged and extended in the longitudinal direction with the extension of the suspension cable 2. In addition to the contraction of the gripping elastic body 8 by the heating mechanism 9, the gripping elastic body 8 extends in the longitudinal direction and the inner diameter is reduced based on the Poisson's ratio of the gripping elastic body 8, so that the suspension can be suspended in the same manner as in the first embodiment. The underwater part 3 can be stopped smoothly by crimping the cable 2.

[0036]

As described above, the first effect of the present invention is that the underwater part can be smoothly stopped at a predetermined depth without damaging the suspension cable. The reason for this is that at any point during the extension of the suspension cable, the contraction mechanism can be actuated to stop sedimentation in the underwater part, and the gripping elastic body, which is connected as a contraction mechanism and can be applied with an extension force, expands. This is because the suspension cable is extended in the longitudinal direction after being closely contacted with the suspension cable, the inner diameter decreases, the gripping force gradually increases, and the suspension cable is stopped. Therefore, it is possible to avoid suddenly grasping the suspension cable.

The second effect is that when the underwater part is stopped,
This means that the reliability is improved without applying stress to the suspended cable. The reason is that in the stopped state,
Since the suspension cable is gripped by the entire extended gripping elastic body, it is not necessary to damage the suspension cable due to a concentrated load generated when the cable is pinched at one point as in the related art.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a perspective view showing a plurality of configuration examples of a gripping elastic body 4 of FIG.

FIG. 3 is a perspective view showing a plurality of configuration examples of a contraction mechanism 6 of FIG.

FIG. 4 is a partial perspective view (a) and a partial cross-sectional view (b) for explaining the operation of the first embodiment of the present invention.

FIG. 5 is a partial perspective view illustrating a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a time characteristic diagram of a tension applied to a suspension cable.

FIG. 7 is a diagram showing a configuration of a conventional marine environment measurement buoy.

FIG. 8 is a cross-sectional view showing a typical example of a conventional suspension cable settling stop mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floating part 2 Suspended cable 3 Underwater part 4 Grasping elastic body 4a Cylindrical grasping elastic body 4b Net-like grasping elastic body 4c Spiral grasping elastic body 5 Hanging cable storage unit 6 Shrinkage mechanism 7 Antenna 8 Gripping elastic body 9 Heating mechanism Reference Signs List 60 elastic body 61 hook 62 actuator 63 annular structure 64 elastic body 65 heat-shrinkable tube 66 heating mechanism 101 floating part 102 hanging cable 103 underwater part 104 two-way shape memory alloy 105 buffer material

Claims (9)

(57) [Claims] An underwater part for acquiring marine environment data, a suspension cable for securing a signal transmission path to the underwater part, and suspending the underwater part with the suspension cable. A variable height buoy characterized by being capable of measuring marine environment data at an arbitrary suspended depth in the underwater part by using a floating portion that floats on the sea and transmits marine environment data by radio waves. (A) a cable storage portion having a cylindrical outer shape made of an elastic member that can be freely extended and restored by application and release of an external force, and is provided in the underwater portion or the floating portion and easily stores the hanging cable; One end of the cylindrical outer shape is connected to allow the hanging cable to freely penetrate inside, and when a predetermined external force is applied to the other end of the cylindrical outer shape, the hanging cable is clamped and gripped at the other end. A gripping elastic body that is stretched against self-elasticity with the extension of the hanging cable and suppresses the sedimentation of the hanging cable by a reaction force generated by the extension. When the tension is applied, the hanging cable is naturally connected to the other end of the cylindrical outer shape of the gripping elastic body to allow the suspension cable to freely penetrate therein, and when the application of the tension is removed, the suspension cable contracts in the central axis direction. The said A contracting elastic body that generates the predetermined external force with respect to the other end of the cylindrical outer shape of the holding elastic body and tightens the suspension cable together with the gripping elastic body, and always applies the circumferential tension to the contracting elastic body; applied to, and a tensioning release structure for releasing the application of the predetermined depth information or applying to the predetermined depth pressure the circumferential direction based on the tension provided and the depth sensor contraction mechanism (2)It has the following components and collects marine environmental data.
Confirm the underwater part to be obtained and the signal transmission path to the underwater part.
A suspension cable for maintaining the underwater part and the suspension cable
Floating over the sea and transmitting marine environment data by radio
The surfacing allows the marine environment data to be
It is possible to measure at the suspension depth
Variable depth buoy. (B) The stretching and restoring by applying and releasing the external force
Having a cylindrical outer shape made of a flexible elastic member,
Or the suspension cable is provided on the floating
Insert one end of the cylindrical outer shape into the cable storage section for easy storage.
Combine and suspend Insert the lower cable freely into the inside
When a predetermined external force is applied to the other end of the cylindrical outer shape, the other
At the end, hold the suspension cable tightly, and
With the extension of the bull, it is stretched against self-elasticity
The suspension cable is pulled by the reaction force generated by this extension.
Elastic body that suppresses sedimentation (B) Normally, the other end of the cylindrical outer shape of the gripping elastic body is naturally
The suspension cable freely penetrates inside
The hanging cable has an inside diameter that shrinks when heated.
A heat-shrinkable cylindrical heat-shrinkable body
Predetermined depth provided by a depth sensor with a heat shrink
A heating structure that causes heat shrinkage based on information.
Compression mechanism 3. A gripping elastic body according to claim 1 or 2.
And made of heat-shrinkable resin material with elasticity
3. A cylindrical gripping elastic body is provided, and the gripping elastic body is provided.
Instead of the retracting mechanism,
Predefined depth combined and provided by depth sensor
A heater that contains a heating element that generates heat in response to input of information
Deploying the structure, the heating for each input of the predetermined depth information
The gripping elastic body is heated and contracted by a mechanism
Depth possible by stopping the settlement of suspended cables
Weird buoy. 4. The gripping elastic body is formed by a cylindrical elastic body.
3. The depth according to claim 1, wherein the depth is formed.
Variable buoy. 5. The gripping elastic body is formed into a net shape having a cylindrical outer shape.
Claims characterized by being formed by the arranged elastic body
Item 7. A variable depth buoy according to item 1 or 2. 6. The holding elastic body is formed in a spiral shape having a cylindrical outer shape.
Characterized by being formed by an elastic body disposed in
The variable depth buoy according to claim 1 or 2. 7. A retracting mechanism for retracting the suspension cable in a natural state.
A cylindrical shrinkable elastic body having an inner diameter for tightening the
Apply radial tension to the shrinkable elastic body
To provide an inside diameter that allows the suspension cable to penetrate freely.
A plurality of hooks engaged with the shrinkable elastic body and these hooks
Multiple actuators to expand / contract radially
Formed by a tension applying / releasing structure
The variable depth buoy according to claim 1, wherein: 8. The retractable mechanism according to claim 1 , wherein the retracting mechanism is in a natural state.
A cylindrical shrinkable elastic body having an inner diameter for tightening the
Affix the shrinkable elastic body to the inner wall and expand it.
With an inner diameter that allows the penetration of
Crushed by seawater pressure in the shrinkable elastic body
Hermetically closed and hollow ring structure for tightening suspension cables
2. The body according to claim 1, wherein the body is formed by:
Variable depth buoy. 9. The retractable mechanism according to claim 1, wherein said retracting mechanism is in a natural state.
Has an inside diameter that allows the cable to penetrate freely, and shrinks when heated.
Heat shrinkable tube for tightening the suspension cable
Shrinkable elastic body, and a heat generating element built-in
Tightly bonded to the contraction based on the predetermined depth information
Heating to heat the elastic body and tighten the suspension cable
3. The mechanism according to claim 2, wherein the mechanism is formed by a mechanism.
Variable depth buoy.