JP2003027768A - Tower structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a tower structure having a multi-layer structure established space in an erect body by a relatively small number of structural members. SOLUTION: The tower structure is so constructed that third rope members 3a are stretched over between the upper end of a mast-shaped multi-layer structure providing cross strut members 6 at right angles to an axial member 1a in the direction of the axis of the axial member 1a and tie members 8 and that fourth rope members 3b are stretched over between the lower end and the tie members 8 to erect by tying first rope members 2 to the tie members 8 from stay leg sections 10 on the foundation 5 to the erect body 1 on which initial tensile force is applied.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tower structure used for telecommunications or the like.

[0002]

2. Description of the Related Art Conventionally, a branch line type broadcasting system in which a rope member such as a wire rope and a cable is connected to a raised structure such as a steel pipe truss structure whose lower end is rotatably supported to stand up, and an antenna is provided at the top of the broadcasting line. A utility tower is known. For example, for radio broadcasting and the like, a branch type steel tower having a height of hundreds of tens of meters has been put into practical use. In such a branch line type tower, since the lower end is pivotally supported, it is not necessary to resist the bending moment at the lower end, and it is necessary to provide solid legs for resisting its own weight and wind load. Compared with the self-supporting steel tower that does not become, it has the advantage that the amount of structural members can be reduced and the weight can be finished. Also, it was only necessary to secure the height of the uppermost part on which the antenna was placed, so the steel pipe truss that composes the three-dimensional structure was constructed with a small cross-sectional area of the three-dimensional structure to suppress wind load, and as a structure with low bending rigidity. Made
It was designed to keep its upright stability by connecting many rope members from low places to high places. On the other hand, in a high-rise tower with a large hoisting structure that can use the interior of the hoisting structure, a self-supporting tower that forms a truss structure with many steel materials including legs has been designed for its self-sustaining stability. .

[0003]

However, in recent years,
Due to the rise of telecommunication, especially large-capacity information communication and mobile communication, there is an increasing need to build a high-speed and large-capacity wireless telecommunication network without laying new optical cables, etc. There is a strong demand for building high-rise tower structures. In such a communication tower, since an antenna with a strong directivity is used, it is necessary to accurately arrange a plurality of antennas in various directions,
The tower must be provided with its installation space. For this reason, it is difficult to deal with the conventional branch line steel tower, and a design has been performed using a self-supporting steel tower that requires a large number of structural members.

The present invention has been made in view of the above problems, and it is possible to construct a tower structure with a comparatively small number of structural members even if a multi-layered structure installation space is provided in the three-dimensional structure. The purpose is to provide. Further, through the above, it is an object of the present invention to provide a tower structure which can shorten the construction period and is suitable for construction in urban areas.

[0005]

In order to solve the above-mentioned problems, in the invention as set forth in claim 1, the tower in which the first rope member is connected to the raised solid body whose lower end is rotatably supported to stand up. In the construction, the raised solid body is provided with a shaft member arranged to extend in the central portion and a plurality of planes orthogonal to the central axis of the shaft member, each extending radially from the shaft member by the same number, The bundle members whose radial direction arrangement in each plane has the same phase and the same angular pitch, the respective tips of the bundle members arranged in the same phase which are continuous in the extending direction of the shaft member, and the shaft member A second rope member stretched by applying an initial tension between the upper end portion and the lower end portion. Therefore, as with general branch line tower construction, it is not necessary to resist the bending moment due to the wind load and the inertial force acting on the center of gravity at the lower end of the raised solid, so a structural member such as a leg of a self-supporting tower construction is required. There is no need to prepare. Moreover, by imposing the initial tension on the second rope member stretched from the upper end of the shaft member to the lower end through the bundle member,
Because of the three-dimensional cable truss structure, the required bending rigidity is secured by the tension of the second rope member. Moreover, unlike a general branch line tower structure, it is possible to provide the raised space with a hierarchical space overhanging by a bundle member.

According to a second aspect of the present invention, in the tower construction according to the first aspect, the length of the bundle member is gradually increased from the end portion of the shaft member toward the central portion, and The extending shape of the second rope member is configured to have a substantially spindle shape. Therefore, the bending rigidity of the central portion where a relatively large bending moment acts is reinforced, while the mass of structural members such as a bundle member can be rationally reduced at both ends of the raised solid body where relatively bending rigidity is not required. Further, in the central portion of the raised solid, the hierarchical space overhanging by the bundle member can be provided more widely.

According to a third aspect of the present invention, in the tower structure according to the first or second aspect, the cross-sectional shapes of the bundle member and the shaft member, which include both central axes, are the same as those of the shaft member. The bundle members are arranged so as to be substantially line-symmetric with respect to the center line. Therefore, since the pair of bundle members are arranged line-symmetrically in one plane so as to face each other, and the second rope member is stretched over the tip of the bundle member, a bending load is applied to the shaft member due to the symmetry. Can be tensioned without. In addition, tension management is facilitated because the tensions may be equal.

According to a fourth aspect of the present invention, in the tower construction according to the first or second aspect, the structure is provided in a plane which is engaged with the bundle member and is orthogonal to the central axis of the shaft member. Provide a flat plate structure on which objects can be placed. for that reason,
A flat plate structure is provided in the hierarchical space extended by the bundle member, and the structures can be arranged in multiple layers. In addition, since the structure load to be arranged is distributed in a flat plate structure and can be received as a compressive load to the shaft member via each bundle member, the structure members can be efficiently used to form a three-dimensional structure. Hierarchical spaces can be provided.

According to a fifth aspect of the present invention, in the tower structure according to the first or second aspect, the tension end for adjusting the tension of the second rope member is provided at the lower end portion of the raising and lowering body which is rotatably supported. To provide. Therefore, the tension control of the second rope member can be performed on the ground, and the construction becomes easy.

According to the invention described in claim 6,
Or the tower structure according to 4, wherein a locking member for locking the first and second rope members to the raised solid is provided at the tip of the bundle member, and the second rope member is provided with the raising member. The third which is stretched from the upper end of the three-dimensional structure and is locked to the locking member
And a fourth cord member that is stretched from the locking member and is locked to the lower end of the raised solid.
Therefore, corresponding to different load states in the upper half portion and the lower half portion of the raised solid body and the magnitude of the locking load of the first rope member, the third rope member and the fourth rope member are respectively provided. You can change the tension. Further, the first cord member is locked to the tip of the bundle member via the locking member, and the couple component due to the locking tension is increased to resist the torsion load of the raised solid.

According to the invention described in claim 7,
In the tower structure described in 2, 4, or 6, a vibration damping member for damping the vibration of the raised solid is provided between the bundle members adjacent to each other in the extending direction of the shaft member. Therefore, the vibration due to the relative displacement of the bundle members adjacent to each other in the axial direction of the raising and lowering solid can be damped, and the tower structure with large internal damping can be damped, and even if a relatively small number of structural members are used, It is possible to ensure stability.

According to an eighth aspect of the present invention, there is provided a rotary bearing composed of an upper shoe member and a lower shoe member which are relatively rotatable via respective receiving surfaces, and the lower shoe of the upper shoe member is provided. A rotation restriction means for restricting the rotation movement of the member about a predetermined rotation axis is provided. Therefore, according to this rotation support, the rotation of the member attached to the upper shoe member about the predetermined rotation axis can be restricted, and even if a member having a relatively large rotational inertia is attached to the upper shoe member,
It can be held stably.

According to the invention of claim 9, claims 1 and 2 are provided.
Alternatively, in the tower structure according to the sixth aspect, the rotation support according to the eighth aspect is used to rotatably support the raised solid. Therefore, in the rotation bearing of this tower structure, it is possible to restrict the rotation of the upper shoe member attached to the lower end portion of the raising body about the vertical axis direction. Therefore, it is possible to reduce the load on the first rope member that locks the raised solid.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing an outline of a tower structure according to the present invention. FIG. 2 is a side view seen from A in FIG. FIG. 3 is a side view seen from B in FIG. 1.

As shown in FIG. 1, in the tower structure according to the present invention, a raised solid 1 rotatably supported by a pivot bearing 4 provided on a foundation 5 constructed on the surface of the earth or on the roof of a building, is a foundation. The first rope member 2 composed of eight pieces extending from the stay leg portion 10 provided on the upper portion of the upper portion 5 is connected to the middle portion thereof to stand upright.

First, with reference to FIGS. 2, 3 and 4, the structure of the raising cube 1 will be described. The raised solid body 1 is provided with a shaft member 1a extending linearly at the center as a main structural member, and four bundle members 6 are respectively arranged from the 12 axial positions in the same phase around the central axis of the shaft member 1a. Protruding at a right angle at 90 degrees to form a hierarchical three-dimensional mast structure. (Hereinafter, this hierarchical structure is referred to as the first layer, the second layer, ...

Since the bundle members 6 have the same phase throughout the respective layers, the bundle members 6 are orthogonal to each other including the central axis of the shaft member 1a.
They are in one plane and aligned. Since the bundle members 6 in each layer have the same length, they are substantially line-symmetric with respect to the central axis of the shaft member 1a. In addition, as shown in FIGS. 2 and 3, the length of each bundle member 6 in the axial direction of the shaft member 1a gradually increases as the distance from the lower end and the upper end of the shaft member 1a approaches the central portion. When the tips are connected, the shape of a spindle is drawn as a whole.

Further, between the bundle members 6 adjacent to each other in the axial direction of the shaft member 1a, a flange provided at the tip of one bundle member 6 and the other bundle member 6 are connected to the shaft member 1a. The bellows member 7 is obliquely attached to the flange provided at the base by pin joining. However, between the sixth layer and the seventh layer where the load is increased, in addition to the through-belt member 7, two thin-bar members 12 are also provided in a staggered manner to increase the rigidity.

Then, the second cord member 3 is stretched from the upper end of the shaft member 1a to the lower end of the bundle member 6 having the three-dimensional mast structure to impose an initial tension. The third cord member 3a which stretches the upper half of the raising solid 1 and the fourth cord which stretches the lower half thereof.
The cord member 3b is divided and stretched. That is, the aviation obstruction light 19 is attached to the uppermost end of the shaft member 1a, and the rope for fixing the third rope member 3a for straddling the tip of the bundle member 6 immediately below the aviation obstacle light 19. A member fixing section 11 is provided. At the tip of the bundle member 6 of the seventh layer, a locking member 8 is provided as an engagement of the third rope member 3a, the fourth rope member 3b, and the first rope member 2. At the lower end of the shaft member 1a, a tension adjusting portion 9 is provided as a tension end for imposing and fixing an initial tension on the fourth rope member 3b.
It is provided with the shape of the upper shoe member for contacting the pivot bearing 4.

Therefore, the raised solid 1 is a third mast member as a chord member from the cord member fixing portion 11 at the upper end to the locking member 8 in the frame of the three-dimensional mast structure composed of the shaft member 1a and the bundle member 6. 3a is stretched to impose an initial tension, and the fourth rope member 3b is stretched to impose an initial tension from the locking member 8 to the tension adjusting portion 9 at the lower end portion of the raised solid 1, thereby forming a three-dimensional cable truss structure. Is formed.

In FIG. 5, the connecting member 8 is provided with a third cord member 3a,
It shows a state in which the fourth cord member 3b and the first cord member 2 are locked. The locking member 8 welded to the tip of the bundle member 6 has a hole through which two third cord members 3a are passed on the upper side and the edge of the locking member 8 receives the surface pressure of the retaining metal fitting 3c to form the retaining member. 8a and a flange 8b for pin-jointing the sled members 7 to transmit the load to the shaft member 1a, and on the lower side, two first cord members 2 and a lower end of the shaft member 1a are provided. It is a member made of cast steel integrated with a socket hole 8c for attaching and fixing the fourth cord member 3b stretched over. In addition, in order to adjust the tension of the third rope member 3a,
An adjustment work hole 8d is provided below the hole 8a so that work can be performed from the outside of the locking member 8.

The two first cord members 2 fixed to the locking member 8 are provided with spans of about 40 m in different directions, and the stay legs 10 installed on the foundation 5 have cord members not shown. They are passed through the mounting holes of the holder, respectively, and are retained by retaining metal fittings, and are fixed after initial tension is applied.

Next, the hierarchical flat plate structure will be described with reference to FIG. 4, taking the case of the fifth layer as an example. Figure 4
It is explanatory drawing which shows the structure in a plane which comprises a 5th layer. The bundle member 6 extending radially from the shaft member 1a has a guide shape for stretching the two third cord members 3a at the tip, and the third cord member 3a is damaged at the tip of the bundle member 6. You can slide smoothly without any.

Between the bundle members 6, a steel frame for providing a flat plate structure for arranging a structure on the bundle members 6 has steel members 15a, 15b, 1 having various sizes and cross-sectional shapes.
5c and 15d are assembled by welding, bolt fastening, riveting, etc., and joined to the bundle member 6. On the upper side thereof, a flat plate structure is constructed by a floor member (not shown). The structure of the steel frame is the bundle member 6 of each layer.
Since the length of each layer is different and the mass and size of the structure arranged on the flat plate structure are different, each layer is individually designed in consideration of the required rigidity.

However, as a structure common to each layer, a space through to the first layer is provided in the vicinity of the shaft member 1a, and a lift 17 for material transportation and a stair 16 through which a person can pass.

In addition, as a common structure from the second layer to the seventh layer, a third octagonal member 3a is extended to the outside of a quadrangle connecting the tips of the bundle members 6 to form a substantially octagonal planar shape. As described above, the steel frame is provided, and the structure can be arranged there. The eighth layer to the twelfth layer are joined by a steel material that connects the tips of the bundle members 6 on which the fourth rope members 3b are stretched in an annular shape.

Next, with reference to FIG. 6, a detailed description will be given of the structure around the upper bearing member of the rotary bearing provided at the lower end of the raising / lowering body 1 and the pivot bearing 4 which is the lower bearing member. Pivot bearing 4
Consists of a cast steel leg portion 4b fixed with four legs on the foundation 5 and a stainless steel convex spherical surface 4a welded to the top portion thereof. Communicate to Foundation 5.

It is the tension adjusting portion 9 welded to the lower end of the shaft member 1a that is combined with the pivot surface 4a as the upper gear member to form the rotation bearing. The tension adjusting unit 9
It is made of cast steel and has a concave spherical surface 1b at the lower end.
However, four cord member holders 1c formed of cylindrical holes for fixing the fourth cord member 3b through the upper side portion are provided.

The pivot surface 4a and the pivot receiving surface 1b have a concave spherical surface whose radius of curvature is a convex surface of the pivot surface 4a in order to reduce the contact area and enable smooth sliding rotation. It is made slightly larger than the radius of curvature of. Therefore, since the support structure itself has no rotation restriction, the shaft member 1a provided with the pivot receiving surface 1b can smoothly incline in any direction, and can rotate and precess. .

Therefore, as a rotation restricting means, a restraint mechanism is provided between the upper shoe member and the lower shoe member so that the upper shoe member can be tilted and the rotation and precession of the upper shoe member are restricted. ing. This restraint mechanism is provided at four positions on the leg portion 4b, and has a spherical fulcrum member 21 having a spherical convex sliding surface and a screw portion for attaching to the leg portion 4b, and the convex sliding surface. The shaft member 1a is provided with a substantially rectangular parallelepiped slide member 22 which is rotatable together and has at least one set of parallel planes on its side surface, and a tip shape which slidably sandwiches the parallel plane of the slide member 22. The beam-shaped arm 23 extends from the. Here, the slide member 22 has a partially concave spherical surface serving as a slide surface on the slide member 22 side so that the slide member 22 can rotate without being disengaged from the convex slide surface of the ball fulcrum member 21 even if an external force is applied. The hemispherical portion is inside the slide member 22, and the remaining spherical portion is screwed into the slide member 2.
The pressing member 22a is integrated with the pressing member 22 and is formed separately. The pressing member 22a is provided with a hole shape for penetrating the threaded portion of the ball fulcrum member 21 and ensuring a desired rotation range. Further, a sliding layer for imparting slidability is provided on each sliding surface, and a solid lubricant baking layer is provided on the concave spherical surfaces of the slide member 22 and the pressing member 22b on the side surface contacting the arm 23. Are each provided with a fluororesin layer.

In the above description, the ball fulcrum member 21 for rotational sliding is used as the lower gear member and the arm 2 for guiding the planar sliding.
3 is provided on the upper shoe member, but replace each one,
An arm-shaped member may be extended from the upper shoe member, a member for rotational sliding may be provided on the arm member, and a flat plate member for guiding flat sliding may be provided on the lower shoe member. Further, in the above, the slide member 22 and the pressing member 22a are integrated by screw fitting to form a partially concave spherical surface. However, if they are integrated, the respective members may be bolted together, or by welding. You may fix it. However, the use of screw fitting, bolt connection, or the like has the advantage that it can be disassembled for maintenance, and repair can be performed when the sliding layer deteriorates.
Further, the partially concave spherical surface is not limited to the above two bodies. It is also possible to assemble members divided into three or more so as to facilitate disassembly and assembly. Moreover, the embodiment of the sliding surface mentioned above is an example, and in addition, in order to increase the durability of the sliding surface, a stainless member is attached,
Alternatively, it is of course possible to build up the surface or apply nickel plating. As the solid lubricant, for example, molybdenum disulfide can be used, but it is not limited to this as long as slidability is obtained. For example, oil-impregnated metal may be used for the sliding surface. Further, the arm 23 and the slide member 2
In the plane sliding of No. 2, it is only necessary that smooth movement within the plane is possible, and a sliding mechanism by rolling using a ball roller having a plurality of ball members rotatably embedded in one side may be adopted.

As a seismic countermeasure for the raised solid 1, in order to provide damping of vibration, a vibration damping rubber layer is sandwiched between a plurality of stabilizers made of steel plates in the first layer, and a weight is installed on the vibration control rubber layer. A damper 13 is provided between the sixth layer and the seventh layer, and a damping device with an amplification mechanism that utilizes the dissipation of energy by a viscous body that is installed by connecting the tips of the bundle members 6 in the vertical direction is used. The damper 14 is arranged. Although not shown, a vibration damper for damping the vibration of the first rope member 2 is provided near the stay leg 10 where the first rope member 2 is connected to the foundation 5. There is.

An example of an embodiment of the material of the raised cube 1 described above will be described. In this embodiment, the raised solid 1 has a height of about 200 m and a maximum diameter of 15 m. Therefore, although the shaft member 1a mainly supports a compressive load, a steel pipe having an outer diameter of 1.7 m is welded and extended so as to keep the bending rigidity and the torsional rigidity as large as possible while reducing the weight. There is. The thickness of the steel pipe ranges from 50 mm to 80 mm from the upper end to the lower end in response to the increase in compressive load.
It varies between mm. The bundle member 6 uses an H-shaped steel material.

The first rope member 2, the second rope member 3, the third rope member 3a, and the fourth rope member 3b are coated structure parallel wire strands for building structure, and have a diameter of 7 mm and a 160 kg / mm ² class. It is made by bundling 397 or 499 galvanized steel wires and covered with polyethylene, and is used properly according to the magnitude of the initial tension.

At the end of each cord member, the strand is separated inside the socket metal fitting, the zinc copper alloy is cast and adhered to the strand, and the socket metal fitting is held under surface pressure at the socket hole to prevent it from coming off. is doing.

The above-mentioned covered parallel wire strands are used for each cord member because the required initial tension is 5000 to 7000 kN in the scale of this example. It goes without saying that various smaller cables and wire ropes can be used depending on the conditions in the case of a smaller-scale tower construction and a smaller initial tension required.

Next, a method of adjusting tension will be described. First, in the end portion of the shaft member 1a, the third cord member 3a and the fourth cord member 3b stretched over the tip of the bundle member 6, and the first cord member 2 locked by the locking member 8, , Initial tension is imposed on each. The adjustment work is performed by pulling each rope member using a center-hole type hydraulic jack and fixing it in an appropriate state while checking the reaction force. For example, in the case of the third cord member 3a, the work is performed in the adjustment work hole 8d provided in the locking member 8 shown in FIG. 5, and the tension adjusting metal fitting 20 is inserted between the locking member 8 and the locking member 8. To fix the proper tension. Further, in the case of the fourth rope member 3b, FIG.
The same work is performed below the cord member holder 1c by using a hydraulic jack as shown in FIG. 3, and the tension adjusting metal fitting 20 is inserted between the retaining metal fitting 3c and the cord member holder 1c. In the case of the first rope member 2, the stay leg 1 is not shown in detail.
When 0, the adjustment work is performed in the same manner.

The operation of the present embodiment described above will be described below. First, the raised solid 1 can have a large bending rigidity. The bending rigidity of the three-dimensional mast structure in which the bundle member 6 is protruded from the shaft member 1a and is reinforced by the streak member 7 is not so different from the bending rigidity of the shaft member 1a, that is, the steel pipe having a small cross section, A third cord member 3a is provided between the locking members 8 and a fourth cord member 3b is connected between the locking member 8 and the lower end portion to impose an initial tension. Since it is possible to form a three-dimensional cable truss structure that acts as a chord member, the bending rigidity can be significantly improved. (The third cord member 3a,
The same thing can be said even if the fourth cord member 3b is replaced with the second cord member 3. ) The initial tension is set to a value at which the rope members do not loosen even when an external force is applied.

For this reason, it is not necessary to arrange many branch line members in the height direction of the raising body to stabilize the raising body, unlike the case of a tower type tower structure supporting the raising body with low bending rigidity. It is not necessary to stretch the cord member 2 of No. 2 over a wide range. Therefore, the rope member and the connecting space can be saved. In addition, since there is no pillar member on the site below the raising body 1, the site can be used for multiple purposes. Furthermore, it contributes to the aesthetics of a tower structure that has been erected upright, and because it has few parts that block the view for its size, it is easy to harmonize with the environment and is suitable for installation in urban areas.

Further, in such a structure, since a cord member such as a coated parallel wire strand having a higher tensile strength than a mass is used as a chord member, it is lighter in weight than a similar steel truss structure made of only steel material. Can be finished.

Further, regarding the construction, it is only necessary to stretch the respective rope members and adjust the tension by the connecting member 8 and the tension adjusting portion 9, so that a large number of steel materials are fastened like a steel truss structure. The number of steps can be saved and the construction period can be shortened. When the tension adjustment unit 9 at the lower end, which is the tension end, is used to extend the tension from the upper end to the lower end of the raised solid body 1 by stretching only the second rope member 3,
Since it can be done only on the ground, including the tension adjustment of the rope member 2 of
Furthermore, the workability is improved and the construction period can be shortened.

A large bending moment acts on the center of the raised solid 1 in the axial direction, but the length of the bundle member 6 is gradually increased from the end to the center so that the bundle has a substantially spindle shape. As a result, the bending rigidity of the central portion can be increased to resist the bending moment. As a result, the flexural rigidity is reasonably strengthened in a well-balanced manner using relatively few materials.

Further, it can be said that the spindle shape generally appeals to the aesthetic sense, and it is also possible to give a design effect by devising the balance of its thickness and curvature.

By the way, in such a three-dimensional cable truss structure, as the length of the bundle member 6 is made longer,
As the number of bundle members 6 increases around the central axis of,
It goes without saying that the second rope member 3 that resists the bending load is effectively used, and a greater bending rigidity can be obtained. However, if the amount is too large, the amount of the member used becomes large, which is uneconomical. Further, when used as an electric communication tower, it is necessary to provide an antenna outside the three-dimensional structure for receiving radio waves, but the space for exposing the antenna is limited, which is impractical. Therefore, in this embodiment, there are four bundle members 6 in each layer.

Of course, depending on the application, the number may be four or more, or three in some cases, but it is significant to make it even. Odd bundle member 6 for each layer
When arranging, it is necessary to apply tension to all the rope members at the same time. Otherwise, due to its asymmetry, the shaft member 1
A bending load is applied to a to cause bending deformation. However, if it is set to an even number, the bundle members 6 can be opposed to each other and aligned on the same plane so that they are line-symmetric with respect to the central axis. With this configuration, as long as the tension is evenly applied, a load for bending and deforming the shaft member 1a is not applied due to its symmetry, so that there is no fear of accidentally permanently deforming the shaft member 1a. Therefore, it is not necessary to work while finely controlling the deformation of the shaft member 1a, so that workability is improved.

Further, the raising cube 1 has a hierarchical flat plate structure in which structures can be arranged. Therefore, the space can be used in various ways. In particular, it is suitable for use in arranging an antenna for performing wireless telecommunication such as microwave communication. Microwave communication is used, for example, for connecting a relay station for mobile communication to perform high-speed and large-capacity wireless telecommunication, but because microwaves have strong directivity, they are used in parabolic antennas and horn reflector antennas. A large number of antennas must be correctly oriented towards the intended receiving antenna.

In this embodiment, since the flat plate structure is provided on the seventh and higher floors and extends outside the quadrangle connecting the tips of the third rope members 3a, it is not limited to the four directions in which the rope members are stretched. A large number of antennas can be mounted in any direction. Moreover, since the raised solid 1 is almost spindle-shaped, the antenna can be mounted up to a relatively higher floor as compared with a general self-supporting truss tower in which the lower end is maximum and narrows toward the upper end.

Further, such a flat plate structure has a cubic structure 1.
Is directly coupled to the bundle member 6 for forming the three-dimensional cable truss structure, and the load of the load on the bundle member 6 is dispersed and transmitted to the bundle member 6, and the load is transferred via the sled member 7. It is transmitted to the shaft member 1a. Therefore, the bundle member 6, the sled member 7 and the like are effectively used in addition to the functions of the truss bundle member and the lattice member.

By the way, when a heavy object such as an antenna is mounted in this way, the mass is concentrated on the upper half of the raising solid 1, and the position of the center of gravity becomes higher. Further, as a result of the antenna and the like being installed so as to project outside the raising solid 1, the rotational inertia of the raising solid 1 also increases.

In the present embodiment, in order to deal with this, the stretched second cord member 3 is divided into a third cord member 3a and a fourth cord member 3b, and the first cord member 2 is also divided. The connection of the cord members including them is performed by the locking member 8. With this configuration, even if the load condition changes significantly above and below the seventh layer, it is possible to properly set the required tension for each. That is, the required tension in the upper layers of the seventh layer and above is naturally higher than the required tension of less than that, so that the tension of the third rope member 3a is equal to that of the fourth rope member 3b.
And the tension including the first rope member 2 are balanced. As a result, it is possible to use only one fourth cord member 3b where two third cord members 3a are stretched.

Furthermore, in order to ensure dynamic stability,
A damping damper 13 is provided on the first layer to reduce the vibration energy in the horizontal plane. In addition, the vibration damping damper 14 connects the bundle members 6 between the sixth layer and the seventh layer, and a relatively large bending moment is applied to the raised solid 1, whereby the bundle members 6
This enables efficient damping of vibration energy at the site where the displacement of is expected to be relatively large. Since it is necessary to apply high tension to the third cord member 3a and the fourth cord member 3b, it is extremely difficult to impart vibration damping to itself. As a means for increasing the internal damping of the three-dimensional cable truss structure, providing the vibration damping means between the bundle members 6 in this way is an effective means utilizing the load condition and deformation condition peculiar to such a structure.

The vibration damping damper 13 and the vibration damping damper 14 may have any structure as long as the vibration energy is absorbed and attenuated. Needless to say, each mounting position may be mounted anywhere as long as the characteristics of each damper can be sufficiently exhibited.

In addition, two first cord members 2 which are locked to different positions on the foundation 5 are locked to the tip positions of the bundle members 6 of the seventh layer via the locking members 8. As a result, as compared with the case where the first rope member 2 is directly connected to the shaft member 1a, the twisting direction of the raised solid 1 is stabilized with a relatively small connecting tension.

Further, in this embodiment, the pivot bearing which has almost no resistance to rotation about an arbitrary axis is remarkably improved, and the pivot bearing having the rotation restricting means is adopted. ing. This principle will be described with reference to FIGS. Note that FIG. 7 is a partial cross-sectional view of the rotation restricting means viewed from the direction E in FIG.

When the raised solid 1 is in the designed standing state, as shown in FIG. 7A, the arm 23 is sandwiched so that the side surface of the slide member 22 is parallel to the vertical axis. For example, the raised solid 1 is one of the fulcrum members 2
Suppose it leans in the direction of 1. Then, the arm 23 is rigidly attached to the shaft member 1a, which is the central axis of the raising body 1, and therefore tilts in the same direction. Therefore, in the two sphere fulcrum members 21 in the position orthogonal to the tilting direction, the arm 23 tilts in the left-right direction as shown in FIG. The member 22 is an arm 23
The angle can be changed by sliding according to the inclination of.
Further, in the other two spherical fulcrum members 21 included in the plane in which the raising body 1 is inclined, as shown in FIG.
3 slides on the side surface of the slide member 22 and moves in the vertical direction. Even if the above-described operation is performed, the spherical convex sliding surface of the spherical fulcrum member 21 is engaged with the partially concave spherical surface of the slide member 22 and the pressing member 22a having a size exceeding at least a hemisphere. Therefore, the slide member 22
The engagement is prevented from being disengaged by an external force acting via the.

The states shown in FIGS. 7 (b) and 7 (c) occur only by tilting in a special direction as described above, but a more general tilting state of the raising solid 1 is at four ball fulcrum members. Two
7 (b), the slide member 21 tilts and the arm 23 moves on the tilted side surface in FIG.
This is realized by the member movement that combines the operation of (c).
However, even in that case, the rotation of the arm 23 about the vertical axis is almost prevented. Actually, the amount of rotation of the arm 23 about the vertical axis is such that a slight elastic deformation, a fulcrum member 21 and a slide member 22, and a slide member 22 and an arm 2 are performed.
It is only to the extent that an assembly clearance in the respective horizontal planes of 3 and 3 is added.

That is, the rotation restricting means constituted as described above restricts the rotation of the upper gear member and the precession of the lower gear member.

Therefore, the rotation bearing of the present embodiment is
Since the rotation about the vertical axis has high rigidity, the rotation of the raising solid 1 around the vertical axis due to an external force is prevented, and by extension,
It is also possible to contribute to the suppression of torsional vibration due to the kneading of the first rope member 2 and the raised solid 1.

In the above, the embodiment in which the second rope member 3 is divided into the third rope member 3a and the fourth rope member 3b has been described, but of course, without dividing, It is also possible to stretch the cord member 3 of No. 2 from the upper end to the lower end of the raised solid 1 and adjust the tension only by the tension adjusting section 9 at the lower end. In this case, the first rope member 2 can be cut off from the second rope member 3 and directly connected to the shaft member 1a. Also, since there are few tension adjustment points, the construction period can be shortened.

Further, in the above description, the length of the bundle member 6 is the same for each layer. By doing so, there is an advantage that the flexural rigidity anisotropy of the raised solid 1 can be reduced, but when the wind is received from a certain direction depending on the environment of the installation location, the anisotropy is intentionally set. You can have it. For example, in the above description, the bundle members 6 facing each other have the same length, and the bundle members 6 adjacent to each other have different lengths.
The whole may be a spindle having an elliptical cross section.

Further, in the above, as an example of the arrangement of the bundle members 6 in each layer in the same phase and the same angular pitch, four members are arranged at an equal angular pitch of 90 degrees. If the axial alignment of the shaft member 1a is maintained in order to stretch the second rope member 3, for example, 100 degrees, 8
They may be arranged at an angular pitch of 0 degree, 100 degrees, 80 degrees, or the like. In this case, even if the bundle members 6 have the same length, the raising solid 1
As a whole, the flexural rigidity is anisotropic as in the above case.

[0062]

As described above, according to the first aspect of the invention, since the three-dimensional cable truss structure is used as the raising and lowering structure, the structural member that is lighter in weight than the steel truss structure is used.
The effect is that a three-dimensional space can be secured in the three-dimensional structure. Since there is no need for structural members such as the legs of the self-supporting tower structure, there is an effect that the space under the raising and lowering space has a better visibility and can be effectively used for multiple purposes. Moreover, since a small number of members are used, the construction period can be shortened, and there are few members that obstruct the field of view even after completion, which is an effect suitable for construction in urban areas.

According to the second aspect of the invention, since the raising solid has a spindle-like shape so as to efficiently resist the bending moment increasing at the central portion of the raising solid, the structural member at the end of the raising solid is The effect is that the amount used can be reasonably reduced. In addition, there is an effect that the hierarchical space supported by the bundle member can be widely secured in the central portion of the raised solid.

According to the third aspect of the invention, the two bundle members are opposed to each other in one plane, and the second rope member is stretched in line symmetry, so that the tension is applied without applying a bending load to the shaft member. Since the tension can be applied and the tension management can be made easy by equalizing the tensions, there is an effect that the construction period can be shortened as a result.

According to the fourth aspect of the present invention, since the flat plate structure is directly provided on the bundle member, the load of the structure disposed on the flat member structure is distributed to the flat plate structure to be received by each bundle member and applied to the shaft member. There is an effect that it can be transmitted as a compressive load, and a space with a hierarchical structure can be provided in the raised solid while efficiently utilizing the structural members.

According to the invention described in claim 5, the tension of the second rope member can be controlled on the ground, and the construction can be facilitated. As a result, the construction period can be shortened.

According to the sixth aspect of the invention, the third ropes are respectively provided in correspondence with different load states on the upper end side and the lower end side of the raising solid body and the magnitude of the locking load of the first rope member. Since the tensions of the member and the fourth cord member can be changed, the amount of cord member used and the required amount of tension can be optimized. Moreover, since the couple component due to the locking tension is increased by locking the first cord member to the tip of the bundle member via the locking member, the twisting load of the raised solid body is relatively small. Therefore, even if a structure having a large mass is mounted, the structure can be stably arranged in the raised cube.

According to the seventh aspect of the invention, internal damping is imparted by providing a vibration damping means utilizing relative displacement of the bundle member in the raised pedestal for which it is difficult to impart vibration damping because of high tension. Since it is possible to construct a cubic structure with improved stability against vibration, even with a large tower structure in which many heavy objects are mounted on a layered flat plate structure and the center of gravity is high There is an effect that stability against vibration can be obtained.

According to the invention described in claim 8, since there is provided the rotation bearing provided with the rotation restricting means for restricting the rotation movement about the predetermined rotation axis, in the structure using the rotation support, the predetermined rotation axis is provided. This has the effect of reducing the number of members for restricting the rotation around.

In the ninth aspect of the invention, since the raising solid is rotatably supported by using the rotation bearing for restricting the rotation movement around the predetermined rotation axis, the rotation of the raising solid about the vertical axis is prevented. Equipped with a hierarchical flat plate structure that can be regulated and can mount a structure, and has a large rotational inertia. Even if the number of members for suppressing rotation of the elevator is reduced, it is possible to stably support the elevator. There is.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a tower structure according to the present invention.

FIG. 2 is a side view seen from A in FIG.

FIG. 3 is a side view seen from B in FIG.

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

FIG. 5 is an explanatory view showing a locking state of the locking member of the tower structure according to the present invention and the first, third and fourth rope members locked to the locking member.

FIG. 6 is an explanatory view showing a leg portion of a tower structure according to the present invention.

FIG. 7 is a partial cross-sectional view for explaining an E-view configuration of the rotation restricting means of the rotation support in FIG. 6 and its operation.

[Explanation of symbols] 1 Kiki 1a Shaft member 2 First rope members 3 Second rope members 3a Third rope member 3b Fourth rope member 4 Pivot bearing (lower gear member) 5 basics 6 bundle members 7 and 12 8 Locking member 9 Tension adjustment unit (upper member) 10 Stay legs 13, 14 Vibration damper (vibration damping member) 21 Ball fulcrum member (rotation restricting means) 22 Slide member (rotation restricting means) 22a Pressing member (rotation restricting means) 23 Arms (Rotation Control Means)

Continued front page    (72) Inventor Hiroaki Tadokoro             3-4-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Within NTT Facilities (72) Inventor Kenji Saito             3-4-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Within NTT Facilities (72) Inventor Yasunori Enoki             3-4-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Within NTT Facilities (72) Inventor Shigeru Hikone             3-3 Uguisudanicho, Shibuya-ku, Tokyo             Up and Partners Japan             Limited Tokyo Branch (72) Inventor Ikuhide Shibata             3-3 Uguisudanicho, Shibuya-ku, Tokyo             Up and Partners Japan             Limited Tokyo Branch

Claims (9)

[Claims] 1. A tower structure in which a first rope member is connected to a raised solid body whose lower end is rotatably supported to stand upright, wherein the raised solid body has a shaft member arranged to extend to a central portion, In a plurality of planes orthogonal to the central axis of the shaft member, the same number is provided to extend radially from the shaft member,
The bundle members whose radial direction arrangement in each plane has the same phase and the same angular pitch, the respective tips of the bundle members arranged in the same phase which are continuous in the extending direction of the shaft member, and the bundle member of the shaft member. A tower construction comprising: a second rope member stretched by applying an initial tension between the upper end portion and the lower end portion. 2. The tower construction according to claim 1, wherein the length of the bundle member is gradually increased from an end portion of the shaft member toward a central portion, and the bundle member has a length of the second rope member in the raised space. A tower structure characterized in that the straddling shape is approximately a spindle shape. 3. The tower structure according to claim 1 or 2, wherein the bundle members and the shaft member, which include both central axes thereof, are substantially line-symmetric with respect to the center line of the shaft member. A tower structure, wherein the bundle member is arranged so as to form an egg. 4. The tower structure according to claim 1, wherein the structure is arranged in a plane that is engaged with the bundle member and is orthogonal to the central axis of the shaft member. A tower structure characterized by being provided with. 5. The tower construction according to claim 1 or 2, wherein a tension end for adjusting the tension of the second rope member is provided at a lower end portion of the raised solid that is supported by rotation. Tower construction. 6. The tower structure according to claim 1, 2 or 4, wherein a locking member for locking the first and second rope members to the raised solid is provided at the tip of the bundle member. A third rope member that stretches the second rope member from the upper end portion of the raised solid body to lock to the locking member, and a third rope member that stretches from the locking member to the lower end portion of the raised solid body. A tower structure, characterized in that it is divided into a fourth cord member. 7. The vibration damping member according to claim 1, 2, 4 or 6, wherein the vibration of the raised solid is damped between the bundle members adjacent to each other in the extending direction of the shaft member. A tower structure characterized by being provided with. 8. A rotary bearing composed of an upper gear member and a lower gear member, which are relatively rotatable via respective receiving surfaces, and a predetermined rotational movement of the upper gear member with respect to the lower gear member. A rotation bearing which is provided with rotation regulation means for regulating the rotation axis of the. 9. The tower structure according to claim 1, 2 or 6, wherein the raising support is rotatably supported by using the rotation support according to claim 8.