JPH0756127B2 - Underwater truss structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater truss structure, and more specifically, it is composed of a large number of rods and spheres. It relates to an underwater truss structure.

[0002]

2. Description of the Related Art An underwater truss structure of this type was invented by the applicant of the present invention, and its basic structure is shown in "Underwater Truss Structure" of Japanese Patent Publication No. 52-3487. The one with a brim (disc) on the rod to enhance the effect is Japanese Patent Publication No. 58-26443 "wave-breaking structure by underwater truss"
Is disclosed in. This is used as a wave reef or a wave-dissipating structure instead of a tetrapot, but it can also be used to realize a structure that floats above the sea surface, one example of which is the applicant of the present invention. It is disclosed in Japanese Patent Laid-Open No. 63-269799 "Dissipation-Stable Sea Surface Levitation Structure".

This underwater truss structure has a large number of rods consisting of a tubular body for resisting compressive force and a tension rod for axially extending tension in the tubular body, and the rods at the ends thereof. It is composed of a large number of connected spheres, and is a combination of basic structures in which the rod is assembled to form a regular tetrahedron with the sphere as the apex. When three-dimensionally assembling this structure, a sphere located inside the structure to be assembled will eventually have 12 spheres.
The end of the rod of the book will be inserted. That is, six rods are radially connected at an interval of 60 ° in one plane passing through the center of the sphere, and the upper and lower sides of the plane are equally spaced at an angle of 60 ° to the plane. Three rods are connected to each other toward the center of the sphere.

[0004]

In this three-dimensional assembly, as a large number of rods are fitted in one spherical body, it becomes difficult to fit the remaining rods, which causes considerable difficulty in actual work. Accompany. Therefore, it is desired to realize an underwater truss structure that is easily assembled in order to increase the efficiency of the three-dimensional assembly work.

Further, since this type of underwater truss structure is used in the ocean or the like, the tension and compression force applied to each part of this structure is extremely large, and its strength must be as large as possible. .

In view of the above problems, it is a primary object of the present invention to provide an underwater truss structure which is easy to assemble so as to improve the efficiency of the assembly work.

It is another object of the present invention to provide an underwater truss structure having sufficient strength to withstand a large tension or compression force.

[0008]

SUMMARY OF THE INVENTION An underwater truss structure according to the present invention comprises a large number of rods consisting of a tube against compression force and a tension rod axially extending into the tube to resist tension. And a plurality of spheres that connect the rods at the ends, and the pipe is an underwater truss structure in which the rods are assembled to form a regular tetrahedron with the spheres as apexes. The body has a double structure whose length can be changed as a whole, and the tension rod is divided into two parts in the length direction, and each divided part is divided into each of the divided double structure pipes. It is characterized by being combined.

Further, the underwater truss structure according to the present invention includes a plurality of rods each comprising a tubular body for resisting a compressive force and a tension rod for axially extending tension in the tubular body, and the rod. An underwater truss structure consisting of a large number of spheres that are connected at the ends, wherein the rods are combined to form a regular tetrahedron with the spheres as vertices, and the tension rods of each rod are It is characterized in that they are connected through the center of the sphere.

Further, the underwater truss structure according to the present invention comprises:
In a similar underwater truss structure, the end of the tension rod extends into the sphere and is locked by means for locking the end of the tension rod provided in the sphere, and the end of the tension rod is connected to the tubular body. It is characterized in that it can be freely moved in and out from the end of the.

It is desirable that the means for locking the end of the tension rod provided on the spherical body should lock the end of the tension rod in a disengageable manner. Specifically, the means for locking the end portion of the tension rod includes an openable / closable locking member provided at the end portion of the tension rod and an end portion of the tension rod provided inside the spherical body, The receiving member has an inner diameter that decreases toward the outside of the sphere, and the smaller inner diameter of the receiving member is smaller than the outer diameter when the locking member is opened, and the end portion of the tension rod is inserted into the receiving member. The end of the tension rod is locked in the receiving member by opening the openable and closable locking member, and the end of the tension rod is released by closing the locking member.

Further, the operating member for opening and closing the openable and closable locking member can be operated from the outside of the rod body, and a part of the operating member is exposed to the outside of the rod body depending on the state of the operating member. It is desirable that the open / closed state of the locking member can be confirmed from the outside.

[0013]

[Operation and effect] The underwater truss structure according to the present invention is
Since the tubular body has a double structure, and the tension rod extending therein is divided into two in the lengthwise direction, and each is connected to each of the dual structure tubular bodies, the rod as a whole is Since the length can be changed and the rod can be expanded and contracted during assembly, the efficiency of the assembling work can be increased.

Further, the underwater truss structure according to the present invention includes a large number of rods each including a tubular body for resisting a compressive force and a tension rod for axially extending tension in the tubular body, and the rods at the ends thereof. In the case of a plurality of spheres connected to each other, since the tension rods of the rods are connected through the center of the sphere, the effect of transmitting the tension applied to one tension rod to the plurality of tension rods and distributing the tension is effective. It is possible to exert sufficient strength to withstand large tension and compression force.

Further, in the underwater truss structure according to the preferred embodiment of the present invention, the end of the tension rod which can be moved in and out from the end of the tubular body of the rod is locked by means for engaging and disengaging the end. Since it is locked to the sphere, the work of expanding and contracting the rod during assembly is easy, and the efficiency of the assembly work can be increased.

Further, the means for locking the end portion of the tension rod includes an openable / closable locking member provided at the end portion of the tension rod and an end portion of the tension rod provided inside the spherical body. , A receiving member having an inner diameter that decreases toward the outside of the spherical body, the smaller inner diameter of the receiving member being smaller than the outer diameter when the locking member is opened, and the end portion of the tension rod is inserted into the receiving member. The end of the tension rod is locked in the receiving member by opening the locking member that can be opened and closed, and the end of the tension rod is released by closing it. The operating member for opening and closing the member is operable from the outside of the rod, and since a part of the operating member is exposed to the outside of the rod, the state of opening and closing of the locking member depends on the state of the operating member. Can be checked from the outside, it is convenient at the time of the assembly operation, it is possible to increase the efficiency of the assembly.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an underwater truss structure according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing a basic structure of an underwater truss structure object of the present invention, FIG.
FIG. 3 is a sectional view showing an internal structure of an end portion of a rod connected to a sphere of an underwater truss structure according to an embodiment of the present invention, and FIG. 3 is a sectional view showing an internal structure of a sphere connected to an end portion of the rod. It is a figure.

As shown in FIG. 1, the basic structure of the underwater truss structure according to the present invention comprises a large number of rods 10 and a plurality of spheres 20 connecting the rods 10 at their ends.
10 is assembled to form a regular tetrahedron with the sphere 20 as the apex.

A brim 30 is fixed to the rod 10 for enhancing the wave-dissipating effect. The number of this brim 30 is one rod
Although it may be one for ten, in order to enhance the effect, it is better to provide one large one in the center and one relatively small one on each side. For such a configuration,
The details are disclosed in Japanese Examined Patent Publication No. 58-26443.

As is well known, the rod 10 is composed of a tube body for resisting a compressive force and a tension rod for axially extending tension in the tube body, which is shown in FIG. 2 in the present invention. As shown, the pipe body 11 is composed of a main portion 12 that forms a main portion of the pipe body 11 and an end portion 13 that is screwed to the main portion 12 inside the end portion of the main portion 12, and as a whole. The tension rod 40 has a double structure whose length can be changed, and the tension rod 40 is divided into two parts in the length direction, and the divided parts 41 and 42 are the divided double structure tube bodies 11, respectively. Combined with 12, 13.

That is, as is apparent from FIG. 2, the main portion 12 of the tubular body 11 has a concave portion at its tip, has a cylindrical surface extending in the axial direction inside the concave portion, and has a screw thread on its inner surface. The rod 13 is provided with a thread 12a, and the end portion 13 of the rod 11 is provided with a thread 13a on its cylindrical outer surface to be screwed with the thread 12a. As a result, the end portion 13 of the rod 11 with respect to the main portion 12 of the pipe body 11 is
When is rotated, the end portion 13 of the rod 11 moves in the axial direction with respect to the main portion 12, and the length of the rod 11 as a whole can be changed. The tension rod 40 is divided into two pieces in the lengthwise direction, and the divided pieces 41 and 42 are respectively connected to the divided tube body 12 and 13 of the double structure. Since the main part 12 and the end part 12 of the rod 11 are respectively connected to the main part 41 and the end part 42 of the tension rod 40, the end part 13 of the rod 11 moves axially with respect to the main part 12. Then, when the length of the rod 11 as a whole is changed, the tension rod 40 can also change its effective length.

Further, the end portion 13 of the rod 11 is formed with a cylindrical extension portion 13b extending toward the end of the rod 11 along the end portion 42 of the tension rod 40, and the end portion thereof is also formed.
The innermost peripheral surface of 13 is provided with a thread 13c that is screwed into a thread 42a provided on the peripheral surface of the tension rod 42.
An elastic member 14 such as rubber or elastomer fitted between a cylindrical portion 13d provided with a thread 13a on the outer surface of the end portion 13 and the cylindrical extension portion 13b is provided outside the extension portion 13b. Inside the extension portion 13b, the cup-shaped tip portion 15a extending to the outer periphery of the tip of the elastic member 14 and the tension rod are provided.
The central cylindrical portion 15b of the rotating member 15, which is composed of the central cylindrical portion 15b extending along the peripheral surface of 42, is fitted axially movably. A key 13e is formed on the inner circumference of the inner end of the central cylindrical portion 15b so as to be axially movably fitted in a key groove 42b formed on the outer circumference of the tension rod 42. Only the rotation of the cylindrical portion 15b is transmitted to the tension rod 42.

That is, when the rotating member 15 is rotated with respect to the end 13 of the rod 11, the tension rod 42 is rotated, and the tension rod 42 is rotated with respect to the end 13 of the rod 11. The tension rod 42 is moved in the axial direction by screwing the threads 42a and 13c. As a result, the tension rod 42 is moved in the axial direction with respect to the end portion 13 of the rod 11,
The protruding end 42c of 42 can be put in and taken out from the end of the rod 11.

Further, according to the above structure, when the rotating member 15 is rotated together with the end portion 13 of the rod body 11, both the tension rod 42 and the end portion 13 of the rod body 11 are rotated. The end portion 13 of the rod 11 does not rotate, the screw threads 42a and 13c do not engage with each other, and the end portion 13 of the rod 11 rotates with respect to the concave portion of the main portion 12 of the tube body 11. The thread 12a provided on the inner surface of the recess.
And a thread 13a provided on the cylindrical outer surface of the end 13 of the rod 11.
The end portion 13 of the rod 11 is axially moved with respect to the main portion 12 by screwing with the rod 11, and the length of the entire rod 11 is changed.

The protruding end 42c of the tension rod 42 is
It can be fitted into a receiving member 21 that surrounds the protruding ends 42c of the 12 tension rods 42 provided on the peripheral surface of the sphere 20 and has an inner diameter that decreases toward the outside of the sphere 20. Further, a locking member 43 which is opened and closed by an operation from the outside is provided at a position slightly inwardly displaced from the tip of the projecting end 42c, and the locking member 43 extends outward of the spherical body of the receiving member 21. It is designed so that it can be locked to the part with the smaller inner diameter. That is, the smaller inner diameter of the receiving member 21 is smaller than the outer diameter of the locking member 43 when the locking member 43 is opened, and the projecting end 42c of the tension rod 42 is inserted into the receiving member 21 and can be opened and closed. The protruding end 42c of the tension rod 42 is locked in the receiving member 21 by opening 43, and the protruding end 42c of the tension rod 42 is released by closing it.

The operation wire 44 for opening and closing the openable and closable locking member 43 has its end 44a exposed to the outside of the rotating member 15 so that it can be operated from the outside of the rod body. The open / closed state of the locking member 43 can be confirmed from the outside by the state of the end portion 44a of 44.

The periphery of the receiving member 21 of the spherical body 20 is solidified with concrete, and a reinforcing bar ring 22 is triplely provided so as to engage with a supporting member 23 for reinforcement. The support member 23 is connected to an annular fixing member 24 fixed to the center of the sphere 20. The annular fixing member 24 is provided with six protrusions 24b on the outer periphery of the annular portion 24a.
The base of the support member 23 and the base of the receiving member 21 are coupled to a.

The outer periphery of the rotating member 15 and the outer periphery of the tip of the end 12 of the rod 11 are knurled to facilitate the mechanical rotation of each member from the outside.

Needless to say, the concrete structure of the underwater truss structure according to the present invention is not limited to the above-mentioned embodiment and various modifications can be made.

[Brief description of drawings]

FIG. 1 is a perspective view showing a basic configuration of an underwater truss structure object of the present invention.

FIG. 2 shows an underwater truss structure according to an embodiment of the present invention,
Sectional drawing which shows the internal structure of the end part of a rod couple | bonded with a sphere.

FIG. 3 is a cross-sectional view showing an internal structure of a sphere coupled to an end of a rod of an underwater truss structure according to the embodiment.

[Explanation of symbols]

 10 Rod 11 Tube 12 Main Part 13 End 20 Sphere 21 Receiving Member 30 Brim 40 Tension Rod

Claims (6)

[Claims] 1. A multiplicity of rods each comprising a tubular body which resists a compressive force and a tension rod which axially extends into the tubular body and resists a tension, and a plurality of spheres which connect the rods at their ends. And an underwater truss structure in which the rods are combined with basic structures assembled to form a regular tetrahedron with the sphere as the apex, wherein the tubular body has a double length that can be changed as a whole. Underwater truss structure having a structure, wherein the tension rod is divided into two in the lengthwise direction, and each of the divided pieces is coupled to each of the divided double-structured pipe bodies. . 2. A large number of rods each comprising a tubular body for resisting a compressive force and a tension rod for axially extending tension in the tubular body, and a plurality of spherical bodies for connecting the rods at their ends. In an underwater truss structure consisting of a combination of basic structures in which the rod is assembled so as to form a regular tetrahedron with the sphere as the apex, a tension rod of each rod is connected through the center of the sphere. An underwater truss structure characterized by being present. 3. A multiplicity of rods comprising a tubular body which resists a compressive force and a tension rod which axially extends into the tubular body and resists a tension, and a multiplicity of spheres which connect the rods at their ends. And an underwater truss structure formed by combining basic structures in which the rod is assembled so as to form a regular tetrahedron with the sphere as an apex, wherein an end portion of the tension rod extends into the sphere. An underwater truss, characterized in that it is locked by means for locking the end of the tension rod provided in the sphere, and the end of the tension rod can be moved in and out from the end of the tube. Structure. 4. The means for locking the end portion of the tension rod, which is provided on the sphere, locks the end portion of the tension rod in a disengageable manner. Underwater truss structure. 5. Means for locking the end of the tension rod provided on the sphere is provided inside the sphere and an openable and closable locking member provided at the end of the tension rod. It comprises a receiving member that surrounds the end portion of the tension rod and has an inner diameter that decreases toward the outside of the sphere, and the smaller inner diameter of the receiving member is greater than the outer diameter when the locking member that can be opened and closed is opened. Small, the end portion of the tension rod is inserted into the receiving member, and the opening / closing locking member is opened to lock the end portion of the tension rod in the receiving member, and the opening / closing locking member. The underwater truss structure according to claim 3, wherein the end of the tension rod is released by closing the tension rod. 6. An operating member for opening and closing the openable and closable locking member is operable from the outside of the rod, and a part of the operating member is exposed to the outside of the rod so that the operating member is in a state. 6. The underwater truss structure body according to claim 5, wherein the open / closed state of the locking member can be confirmed from the outside.