JP2982082B2 - 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 a truss structure particularly installed on the sea floor.

[0002]

2. Description of the Related Art A truss structure is submerged on the seabed and is used as a fish reef or as a buffer for mitigating waves. Such a truss structure is formed, for example, by connecting a plurality of bar members with a ball. It is built by doing. As the bar member, for example, a member in which a tension member such as a metal tension rope is inserted inside a concrete cylindrical bar is used, and the bar member is obtained by incorporating an end of the tension member into a ball. Is jointed to the ball. The tensile force acting on the bar member is received by the tension member, and the compressive force is received by the cylindrical bar.

[0003]

By the way, in the conventional truss structure, the assembling of the tension member to the ball is performed, for example, by attaching a projection member fixed to an end of the tension member to a hole formed in the ball. It was made by press-fitting (see Japanese Patent Publication No. 52-3487).
There was a problem that assembly was poor.

Therefore, a joint structure has been proposed in which a bar member is joined to the ball with good workability by inserting a stopper or the like provided at the end of the tension member into a locking member projecting from the ball from the lateral direction thereof and incorporating it. Is done.

However, when the above-mentioned joint structure is employed, it is actually necessary to accurately incorporate the tension member into the ball due to variations in the length dimension of the tension member and positional accuracy errors of the locking member protruding from the ball. There are things you can't do.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a truss structure capable of improving assemblability and assembling accuracy.

[0007]

In order to achieve the above object, the present invention relates to a truss structure constituted by joining a plurality of bar members including a tension member with a ball. Department
The bar member is joined to the ball by being inserted into a locking member projecting from the ball and inserted into the locking member from a lateral direction, and a tension member is fixed to a piece at least one end of which is locked by the tension member. It is characterized in that it is divided into two pieces and another piece connected to the piece, and a length adjusting mechanism for the tension member is provided at a connection portion between the two pieces.

[0008]

According to the present invention, the tension member can be inserted into the locking member projecting from the ball by inserting the end portion of the tension member from the lateral direction of the locking member. The truss structure can be attached with one touch, and the length of the tension member after the assembly is adjusted by the length adjusting mechanism.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 5 is a perspective view of a basic truss unit of the truss structure according to the present invention. The basic truss unit is formed by joining six bar members 1... With four balls 2. Is constructed as a three-dimensional truss structure, and a plurality of the basic truss units are combined to construct one truss structure.

Here, the joint structure of the truss structure according to the present invention will be described in detail with reference to FIGS.
1 is a sectional view showing a joint structure of the truss structure according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. 1 is a sectional view taken along line CC of FIG.

As shown in FIG. 1, the ball 2 is a hollow sphere made of concrete, and has a spherical shell 3 made of metal or reinforced plastic (FRP) embedded therein. Metal collars 4 serving as locking members are radially attached to the spherical shell 3, and circular dish-shaped grooves 5 are provided on the outer surface of the ball 2 where the collars 4 project. Are formed. In addition, on the outer surface of the ball 2, adjacent dish-shaped grooves 5...
Are formed.

By the way, the spherical shell 3 has a two-part structure, in which circular holes 7 are formed, and the collar 4 is passed through each circular hole 7 from the inside. A flange 4a is formed at one end of the collar 4, and the collar 4 is pushed out of the spherical shell 3 until the flange 4a comes into contact with the inner peripheral surface of the spherical shell 3, and fitted to the outer peripheral portion thereof. The metal or rubber stopper ring 8 prevents the fall into the spherical shell 3.

When all of the collars 4 are attached to the divided pieces of the spherical shell 3 as described above, the two divided pieces are joined and integrated to form the spherical shell 3, and thereafter this spherical shell 3 is assembled. The ball 2 is obtained by pouring concrete into a mold (not shown) as a core and curing the concrete. As shown in FIG. 2, a notched groove 4b is formed on an end surface of the collar 4 projecting from the ball 2, and a circular shape connected to the notched groove 4b is formed on a side wall of the collar 4 as shown in FIG. A groove 4c is formed.

On the other hand, as shown in FIG.
Is formed by inserting a metal tension rod 10 as a tension member into a cylindrical cylindrical bar 9 made of concrete, and a bar end socket 1 made of metal is provided at an end of the bar 9.
1 is fitted. The bar-end socket 11 holds an elastic head 12 formed in a cylindrical shape with an elastic body such as rubber, and a metal head cup 13 is covered on an end of the elastic head 12. . The head cup 13 is formed into a shape that fits into the dish-shaped groove 5 formed on the outer surface of the ball 2.
4 and nuts 15 screwed to the bolts 14 are connected to the bar end socket 11.

A stopper 16 is attached to the end of the tension rod 10.
As shown in FIG. 2, a projection 16a is formed to engage with a cutout groove 4b formed on the end face of the collar 4.

Incidentally, the tension rod 10 is 3
As shown in FIG. 1, the rods 10A and 10B are connected by a turnbuckle 17 screwed to them. The turn buckle 17 constitutes a mechanism for adjusting the length of the tension rod 10, and the rotation of the turn buckle 17 causes the rods 10A, 10B to rotate.
Are moved in opposite directions to each other so that the tension rod 1
The length of 0 is adjusted. In this embodiment, the tension rod 10 is divided into three parts. However, the tension rod 10 may be divided into two parts and both divided pieces (rods) may be connected by one turnbuckle 17.

A bevel gear 18 is integrally formed at the end of the turnbuckle 17, and the turnbuckle 17 is one of oblong holes 19a and 19b formed at opposing portions of the bar 9. It is rotated by a rotary tool 20 inserted from 19a. That is, the support 21 is inserted into the bar 9 from the oblong hole 19b, and the end of one rod 10A is inserted into the concave groove 2 of the support base 22 of the support 21.
2a is fitted and supported. Note that the width dimension a (see FIG. 3) of the support base 22 is set smaller (a <L) than the length dimension L (see FIG. 4) of the oblong hole 9b, and the thickness dimension t (see FIG. 1) is It is smaller than the width dimension b of the oblong hole 19b (t <
b) It is set. Therefore, the support 22 of the support 21
Can be inserted into the bar 9 by rotating the entire support 21 by an angle of 90 ° with respect to the state shown by the solid line, as shown by a chain line in FIGS. Then, the support table 22
Is inserted into the bar 9 after passing through the oblong hole 19b, and then the entire support 21 is rotated by an angle of 90 °, as shown by a solid line in FIG. 1 and FIG. The end of the rod 10A can be supported by the concave groove 22a.

On the other hand, a handle 24 is attached to an upper end of a shaft 23 of the rotary tool 20, and a bevel gear 25 to be meshed with a bevel gear 18 formed on the turnbuckle 17 is formed at a lower end of the shaft 23. Have been. A bearing member 26 is inserted through the shaft 23, and a lower surface of the bearing member 26 has projections to be engaged with engagement grooves 22 b formed on the upper surface of the support base 22 of the support 21. 26a are protruded.

The bearing member 26 of the rotary tool 20
The dimensional relationship with respect to the oblong hole 19a is the same as the dimensional relationship with respect to the oblong hole 19b of the support 22 of the support 21. To insert the rotary tool 20 into the bar 9, it is shown by a chain line in FIG. Thus, the bearing member 26 may be passed through the oblong hole 19a while being rotated by an angle of 90 ° from the state shown by the solid line. After the bearing member 26 is inserted into the bar 9, the bearing member 26 is turned by an angle of 90 °, and the projections 26 a projecting from the lower surface thereof are engaged with the engagement grooves 22 b formed in the support base 22. , 22b to join and integrate the bearing member 26 with the support base 22, as shown in FIGS. 1 and 3, the bevel gear 25 of the rotary tool 21 is connected to the bevel gear 18 formed on the turnbuckle 17. Mesh. At this time, the rods 10A, 1A
The rotation of 0B is achieved by engaging the projection 16a of the stopper 16 provided at each end with the notch groove 4b of the collar 4.

Accordingly, if the shaft 23 is turned by operating the handle 24 of the rotary tool 20 in the above state, the shaft 2
The rotation of No. 3 is transmitted to the turnbuckle 17 via the bevel gears 25 and 18, and the turnbuckle 17 is rotated to adjust the length of the tension rod 10 as described above. After the length adjustment, the rotary tool 20 and the support 21 are pulled out of the bar 9 in the same manner as when they are inserted.

Next, the procedure for joining each bar member 1 to the ball 2 will be described.

First, the nuts 15 provided at the ends of the bar member 1 are turned to move the head cup 13 along the bolts 14 toward the bar end socket 11 at the position shown by the chain line in FIG. 2 to a position that does not interfere with the outer surface of the bar member 1) to reduce the length of the bar member 1 as a whole. The movement of the head cup 13 is allowed by the compression deformation of the elastic head 12.

In the above state, the tension rod 1
Although the length of the ball 2 is invariable, the stopper 16 at the end of the tension rod 10 passes through the concave groove 6 formed on the outer surface of the ball 2 to reach the dish groove 5, and the dish groove 5 The collar 4 is fitted into the collar 4 through a circular groove 4c formed in the side wall of the collar 4 and the projection 16a formed in a part of the collar 4c.
Engages with a notch groove 4b formed in the end face of the collar 4.

After the stopper 16 of the tension rod 10 is fitted into the collar 4 as described above, if the nuts 15 are loosened, the head cup 13 returns to its original position under the compression reaction force of the elastic head 12, As shown by the solid line in FIG.

Finally, if the length of the tension rod 10 is adjusted as described above, the ball 2 of the bar member 1 can be adjusted.
The joint work to is completed.

By repeating the above joint operation, one truss structure is constructed. In the truss structure, the tensile force acting on the bar member 1 is received by the tension rod 10, and the compressive force is transmitted by the bar 9. Can be received. The impact force acting on the truss structure is absorbed and reduced by the elastic head 12.

As described above, according to the present embodiment, the tension member 10 is configured such that the stopper 16 at the end thereof is
Since the bar member 1 can be inserted into the locking member 4 projecting from the side from the lateral direction and assembled, the joint of the bar member 1 to the ball 2 can be easily performed with one touch, and the length of the tension member 10 after the assembly is adjusted. Is performed by the turnbuckle 17 which is a length adjusting mechanism, so that the assembling property and assembling accuracy of the truss structure are improved.

In the above embodiment, the turn rod 17 is used as the length adjusting mechanism of the tension rod 10 and the turn rod 17 is rotated via the bevel gears 25 and 18. However, the present invention is not limited to this. Other arbitrary methods can be adopted.

[0030]

As is apparent from the above description, according to the present invention, in a truss structure constituted by joining a plurality of bar members including a tension member with a ball, an end of the tension member is provided. The bar member is joined to the ball by inserting a portion into a locking member projecting from the ball from the lateral direction of the locking member, and the tension member is locked at least one end of the locking member. The truss structure is divided into a piece and another piece connected to the piece, and the length adjusting mechanism of the tension member is provided at a connection portion between the two pieces, so that the assemblability and assembling accuracy of the truss structure are improved. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a joint structure of a truss structure according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a perspective view of a basic truss unit of the truss structure according to the present invention.

[Explanation of symbols]

 1 Bar Member 2 Ball 4 Collar (Locking Member) 9 Bar 10 Tension Rod (Tension Member) 17 Turnbuckle (Length Adjusting Mechanism)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Yasuo Hara 2500 Shinkai, Iwata-shi, Shizuoka Yamaha Motor Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1/58-1 / 58 505 A01K 61/00 315 E02B 3/14 303

Claims (1)

(57) [Claims] 1. A truss structure composed by a plurality of bar members which encloses the tension member to the joint at the ball, locking the ends of the tension member, the locking member protruding from the ball The bar member is jointed to the ball by being inserted from the lateral direction of the member and the tension member is connected to at least one end of the locking member.
The piece to be locked and the other pieces connected to the piece
2 split, truss structure, characterized in that a length adjusting mechanism of the tension member to the connecting portions of both pieces.