JP3511239B2 - Steel tower intermediate raising device and steel tower intermediate raising method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron tower intermediate raising apparatus and an iron tower intermediate raising method.

[0002]

2. Description of the Related Art In order to increase the height of an existing steel tower,
As a tower raising device that raises the entire existing tower,
A patented product (Japanese Patent No. 1494778) is known. This prior art, as shown in FIGS. 8 and 9, comprises four sets of rod weights, each of which is composed of a rod weight main column 11 and a fixing truss support member 12 for fixing the upper portion of the rod weight main column 11 in the directions of two axes at right angles. Frame 1
Are arranged outside the four corners of the assembled steel tower A ', and two telescopic tower lifting beams 2 are moved up and down by the control of the steel tower lifting hydraulic jacks 13 mounted on the respective droop weight main columns 11. Fixed in parallel with the lower end of the threaded tension rod 14,
Two sets of steel tower mounting beams 4 which are both extendable and slidably mounted with two steel tower main leg material gripping means 5.
Are mounted parallel to each other at regular intervals and slidably in the longitudinal direction of the steel tower lifting beam 2 between the respective steel tower lifting beams 2, so that the steel tower pulling load is always constant regardless of the stroke position of the rod 74 during the lifting operation. A load cylinder 7 for pulling down a steel tower is attached to each drooping main column 11,
A wire rope 76 is connected to one end of each steel tower lifting beam 2 and a rod 74 of each load tower 7 for pulling down each steel tower via a sheave 75 provided at the lower end of each drooping main column 11. It is a thing.

8 and 9, 11A is a plate fixed to the foundation B ', 11B is a pair of H-shaped steels standing upright in parallel, 11C is a bracket provided on H-shaped steel 11B, 11D. Is a bracket fixed to the foundation B ', 2
Reference numeral 1 is a lower nut that fixes one end of the steel tower lifting beam 2 to the lower end of a tension rod 14 by threading, 22 is a connecting member which is a box-shaped beam that constitutes the steel tower lifting beam 2, and 23 is a steel tower lifting beam 2 2 which is configured and is inserted into the connecting member 22.
A fixing member which is a box-shaped beam of the book, 23A is a linear slide groove, 23B is a bolt hole, 3 is a guide roller unit fixed to the upper surface of the fixing member 23 and rolling the rod main pillar 11 up and down, 43 Is a connecting member which is one box-shaped beam constituting the steel tower lifting beam 4, 44 is the steel tower lifting beam 4, one end is fixed to the steel tower lifting beam 2, and the other end is a connecting material 43. Fixing material that is two H-shaped steels inserted,
Reference numeral 61 is a connecting member that is one steel pipe that constitutes the upper fixed beam 6, 62 is the upper fixed beam 6, and one end is fixed to the drooping main column 11 and the other end is inserted into the connecting member 61. A fixing member that is two steel pipes, and 71 is a cylinder of the load cylinder 7.

In this prior art, in order to increase the height of an existing steel tower, a new foundation B'in which new leg members are arranged around the foundation of the existing steel tower is installed, and then four sets of droop frames 1
Are fixed to the foundation B ', and are arranged outside the four corners of the assembled tower A', the main tower material holding means 5 holds the main foot material at the bottom of the tower, and the main tower material holding means 5 is attached. The steel tower lifting beam 2 to which the steel tower mounting beam 4 is attached
The hydraulic jack 13 for pulling up a steel tower mounted on the upper part 1 is pulled up to raise and hold the entire assembled steel tower A ′. After raising the steel tower A'to be assembled, a new leg material and a main leg material at the bottom of the steel tower are newly added by using the upper fixed beam 6 and the like connecting the upper portions of the four sets of the dredge frame 1. Assembling of the lower insertion block frame, such as insertion of the main leg material for raising the height, completes the raising of the existing steel tower.

[0005]

This prior art is based on the premise that the strength of the foundation of the existing steel tower is insufficient when increasing the height of the existing steel tower. Therefore, a new leg is formed around the foundation of the existing steel tower. After the foundation B'on which the materials are arranged is newly installed, four sets of the drooping frames 1 are fixed to the foundation B'and the entire existing steel tower is raised from the main leg material at the bottom of the steel tower. However, depending on the type and design conditions of the existing steel tower, the strength of the foundation of the existing steel tower may not be insufficient even if the required padding is performed. In this case, of course, the foundation will not be newly constructed. Therefore, in order to use this conventional technique, since the existing foundation cannot be used for fixing the dredge frame 1,
There is no choice but to temporarily construct a construction foundation, but construction of a construction foundation has a heavy economic burden and cannot be adopted at all. This conventional technique has a problem that it cannot be used unless a foundation on which new leg members are arranged is newly installed.

The present invention has been made for the purpose of solving the problems of the prior art.

[0007]

Means for solving the above problems will be described below with reference to FIGS. 1, 5 , 6 , and 7 corresponding to one embodiment. According to the present invention, a lifted upper pedestal 200 is fixed to a lifted upper main pillar material X via an upper main pillar material gripping means 100, and a lower main pillar material gripping means 300 is fixed to a lower main pillar material Y which is not lifted. a non-elevated base frame 400 which is fixed via a ball hollow spool to the upper end
Line nut 504 is inserted and fixed,
A guide bearing 505 and a thrust bearing 506 are attached to the lower end.
Cylindrical shape with inserted bearing case 507 inserted and fixed
Inside the outer cylinder 501 of the guide bearing 505 and the thrust bearing.
Supported by the bearing case 507.
The electric motor installed in the fixed motor mount 502.
The coupling 509, 501,
A ball screw shaft 512 that rotates through a speed reducer 510,
Screw the ball screw shaft 512 to rotate the ball screw shaft 512.
The ball screw nut 521 that moves up and down with the
If the ball screw nut 521 is inserted and fixed at the end
Both project from the upper end of the outer cylinder 501 to the upper end and lift up.
Upper joint 523 fixed to one corner of the base 200
Is fixed by the ball hollow spline nut 504.
Rotation is blocked, and at the same time guided in the vertical movement direction
When the ball hollow spline shaft 522 is arranged,
The two fixed to one corner of the non-raised lower mount 400
The middle portion of the outer cylinder 501 is attached to the middle bracket 503 of the split cylinder.
It is composed of four jack-up means 500 which are fixed to each other, and is configured to raise the upper pedestal 200 by the synchronous operation of the electric motors 508 of the four jack-up means 500.

In such a structure, if the strength of the foundation of the existing steel tower is not inadequate even if the required height is raised, the lower main pillar member Y which cannot be lifted up is held by the lower main pillar member gripping means 300. By fixing the non-raised lower pedestal 400 via the, the padding is performed in the middle of the steel tower.

[0009]

1 is a diagram showing an embodiment of the present invention. In FIG. 1, X is an upper main pillar material that can be raised, Y is a lower main pillar material that cannot be lifted, 100 is an upper main pillar material gripping means, 200 is an elevated upper mount, 30
Reference numeral 0 is a lower main pillar material gripping means, 400 is a non-raised lower mount, and 500 is a jack-up means.

As shown in FIGS. 2 and 3, the upper main pillar material gripping means 100 includes a fixing member 101 fixed to the upper main pillar material X to be raised with bolts and nuts, a fixing member 101 and a rising upper mount. The fixing member 102 is fixed to 200 with bolts and nuts. Fixing member 10
No. 1 is attached to both flanges of the upper main pillar material X which is made of chevron steel and has a corrobi, and holes are drilled at the attachment points of both flanges. Fixing member 101
Is a steel plate (thickness: 12 m
bending member (length about 300 m)
m), and each of the flanges is provided with four holes. The fixing member 102 is an angle steel (HL150 ×
8, the length is about 300 mm), and four holes are formed in each of the flanges.

As shown in FIGS. 2 and 3, the lifted-up upper pedestal 200 is constructed by assembling four chevron-shaped steels 201, which are freely expandable and contractable, and plates 202 (thickness: 16 mm) are arranged at the four corners of the pedestals. -Fixed with nuts. The chevron steel 201 includes two chevron steel 203 (HL150 × 8, length about 1,400 mm) and chevron steel 204 (HL15 for joint).
0 × 8, length about 700 mm). One of the angle steel 203 and the angle steel 204 for joint is provided with three 18 × 86 horizontally elongated holes at a pitch of 100 mm, and each of the two horizontally elongated holes is connected with a bolt / nut. Depending on the angle steel 201, the length of ± 90mm
Can be adjusted. Adjusting the length of the angle steel 201
This is because it is considered that the upper main pillar material X has corobi and that the mounting position of the elevated upper pedestal 200 may change due to the relationship between diagonal members and the like. The plate 202 is provided with a fixing member 205 to which a part of the fixing member 102 is fixed. The fixing member 205 is made of chevron steel (HL150 × 8, length 150 mm), and is downward when the chevron steel 203 is upward, or upward when the chevron steel 203 is downward, and the lower surface or the upper surface of the plate 202 with bolts and nuts. It is fixed to. In addition, the specific numerical value of the elevated upper pedestal 200 corresponds to one mode of the 60,000-volt transmission line steel tower, and naturally changes depending on the size and the interval of the upper main pillar X.

On the upper surface of the plate 202, the plate 20
Two ribs 206 for reinforcing 2 are provided upright. The plate 202 is provided with holes 207 for connecting the upper end of the jack-up means 500, which will be described later, to the four corners of the upper mount 200, that is, for connecting to the plate 202.

The downward flange is placed inside (upper main pillar material X
Side) and two chevron steels 201 are arranged facing the outside of the upper main pillar material X, and chevron steels 203 are fixed to the fixing member 102 with bolts and nuts. Next, the plate 202 is fixed to both ends of the two angle steels 201 with bolts and nuts. Next, the upward fixing member 205 is fixed to the upper surface of the plate 202 and the fixing member 102 with bolts and nuts. further,
Two chevron steel 201 are arranged to face the outside of the upper main pillar X with the upward flange inside (upper main pillar X side), and the chevron 203 is provided on the upper surface of the plate 202 and the fixing member 102. Secure with bolts and nuts. Next, the downward fixing member 205 is attached to the lower surface of the plate 202 and the fixing member 102.
Secure with bolts and nuts.

As shown in FIG. 4, the lower main pillar material gripping means 300 includes a fixing member 301 fixed to the lower main pillar material Y which cannot be raised by bolts and nuts, a fixing member 301 and a non-raised lower mount. The fixing member 302 is fixed to 400 with bolts and nuts. Fixing member 30
No. 1 is attached to both flanges of the lower main pillar material Y which is made of chevron steel and also has corrodes, and holes are drilled at the attachment points of both flanges. Fixing member 301
Is a steel plate (thickness: 12 m
bending member (length about 300 m)
m), and each of the flanges is provided with four holes. The fixing member 302 is an angle steel (HL150 ×
8, the length is about 300 mm), and four holes are formed in each of the flanges.

As shown in FIG. 4, the non-raised lower pedestal 400 is formed by assembling four chevron-shaped steels 401, which are freely expandable and contractable, and plates 402 (thickness: 16 mm) are arranged at the four corners of the studs. It is fixed with a nut. The angle steel 401 includes two angle steel 403 (HL150 × 8, length about 1,400 mm) and angle steel 404 (HL15 for joint).
0 × 8, length about 700 mm). One of the angle steel 403 and the angle steel 404 for joint is provided with three 18 × 86 horizontally elongated holes at a pitch of 100 mm, and each of the two horizontally elongated holes is connected with a bolt / nut. Depending on the angle, the length of the angle steel 401 is ± 90mm
Can be adjusted. To adjust the length of the angle steel 401,
This is because it is considered that the lower main pillar material Y has corobi and that the mounting position of the non-raised lower pedestal 400 may change due to a diagonal member or the like. The plate 402 is provided with a fixing member 405 to which a part of the fixing member 302 is fixed. The fixing member 405 is an angle steel (HL150 × 8,
It has a length of 150 mm) and is fixed to the lower surface or the upper surface of the plate 402 with bolts and nuts downward when the angle steel 403 is facing upward, or upward when the angle steel 403 is facing downward. The specific numerical value of the non-raised lower pedestal 400 corresponds to one mode of the 60,000-volt transmission line steel tower, and naturally changes depending on the size and spacing of the lower main pillar Y.

The plate 402 is provided with holes 406 for connecting the intermediate bracket 503 of the jack-up means 500, which will be described later, to the four corners of the lower mount 400, that is, for connecting to the plate 402. Further, the plate 402 is provided with a U-shaped cutout portion 407 in the direction of 45 degrees, and after disposing an intermediate bracket 503 to be described later in the plate 402 through the cutout portion 407, one portion of the cutout portion 407 is removed. A closure lid 408 is pivotally attached.

The downward flange is placed inside (lower main pillar material Y
Side) and two angle steels 401 are arranged to face the outside of the lower main pillar material Y, and the angle steels 403 are fixed to the fixing member 302 with bolts and nuts. Next, the plate 402 is fixed to both ends of the two angle steels 401 with bolts and nuts. Next, the upward fixing member 405 is fixed to the upper surface of the plate 402 and the fixing member 302 with bolts and nuts. further,
Two chevron steels 401 are arranged so as to face the outer side of the upper main pillar material X, with the upward flanges on the inner side (upper main pillar material X side), and the chevron steel 403 is provided on the upper surface of the plate 402 and the fixing member 302. Secure with bolts and nuts. Next, the downward fixing member 405 is attached to the lower surface of the plate 402 and the fixing member 302.
Secure with bolts and nuts.

The jack-up means 500 is an outer cylinder 50.
1, a motor mount 502, an intermediate bracket 503, a ball hollow spline shaft 522, and the like.

The jack-up means 500 is shown in FIGS.
It will be described in detail based on 7. The outer cylinder 501 has a cylindrical shape, and a ball hollow spline nut (with a flange) 504 is inserted into the upper end of the outer cylinder 501 and is fixed with a bolt, and the lower end of the guide bearing 505 and the thrust bearing 50.
The bearing case 507 on which No. 6 is mounted is inserted and fixed by bolts.

The motor mount 502 is fixed to the bearing case 507. An electric motor 508, a coupling 509, a speed reducer 510, and a coupling 511 are arranged in the motor mount 502.

A bearing case 507 is provided at the center of the outer cylinder 501.
The ball screw shaft 512 supported by the guide bearing 505 and the thrust bearing 506 is arranged. The lower end of the ball screw shaft 512 is connected to the speed reducer 510 via the coupling 511, and the lower end of the ball screw shaft 512 is connected to the bearing case 50.
Bearing 513 and ball screw shaft 51 fixed to No. 7
It is mounted on a guide bearing 505 and a thrust bearing 506 supported by a nut 514 screwed to the second member via a collar 515 and a spacer 516. Ball screw shaft 51
2 is the coupling 5 by the rotation of the electric motor 508.
09, the reduction gear 510, and the coupling 511, and is rotatably supported by the guide bearing 505 and the thrust bearing 506, and can receive a load in the rotational direction and the vertical direction.

A bush 517, a bearing case 518, a guide bearing 519, and a nut 520 are arranged on the upper end of the ball screw shaft 512, and the upper end of the ball screw shaft 512 is guided in the rotational and vertical movement directions to prevent vibration.

The ball screw nut 521 is screwed onto the ball screw shaft 512 and moves up and down as the ball screw shaft 512 rotates. As a result, the ball hollow spline shaft 5
Move 22 up and down.

The ball hollow spline shaft 522 has a ball screw nut 521 inserted at its lower end and fixed by a bolt, and an upper joint 523 projecting from the upper end of the outer cylinder 501 is fixed at its upper end by a bolt. The ball hollow spline shaft 522 is prevented from rotating by the ball hollow spline nut 504, and at the same time is guided in the vertical movement direction, and thus blocks the rotation of the ball screw nut 521. As the ball screw shaft 512 rotates and the ball screw nut 521 moves up and down, the ball hollow spline shaft 522 rolls up and down a ball (not shown) mounted on the inner surface of the ball hollow spline nut 504. The upper joint 523 is a bolt / nut 52.
4 is fixed to the plate 202 of the lifted upper mount 200, whereby the jack-up means 500 is
It is connected to the elevated upper mount 200.

As shown in FIG. 5, the stopper 525 is a cylinder with a flange and is inserted into the outer cylinder 501 so that the outer cylinder 50 is
It is held by the stepped portion in 1 and is fixed to the outer cylinder 501. The stopper 525 includes a spacer 526 inserted in the outer cylinder 501 and a lower ball hollow spline nut 527.
And to contact the lower end flange 528 of the ball hollow spline shaft 522 to limit the upper limit stroke of the ball hollow spline shaft 522.

The intermediate bracket 503 has a split cylinder 529 and a split cylinder 5 formed by splitting the cylinder in the axial direction.
Wings 53 formed on the left and right sides of the 29 in the split direction
0, a half-circular flange 531 provided at the upper and lower ends of the split cylinder 529, 532, and a bolt and nut 533 attached to the wing 530. In addition, 534 is a rib 535 that reinforces the split cylinder 529.
Is an eyebolt for hanging work attached to the flange 531.

The intermediate bracket 503 not only attaches the outer cylinder 501 to the non-raised lower pedestal 400 but also supports the vertical load of the steel tower applied to the outer cylinder 501 when the elevated upper pedestal 200 is hoisted. At the same time, it functions as a reinforcing material against the bending moment applied to the outer cylinder 501 by the horizontal load of the steel tower.

The middle portion of the outer cylinder 501 is wrapped with a halved cylinder 529, and the halved cylinder 529 is covered with bolts and nuts 533.
When is tightened, the outer cylinder 501 is fixed to the intermediate bracket 503. Therefore, the mounting position of the intermediate bracket 503 can be freely adjusted from the upper part to the lower part of the outer cylinder 501 by moving the split cylinder 529 up and down. This facilitates selection of the mounting position of the raised upper pedestal 200 or the non-raised lower pedestal 400.

The intermediate bracket 503 has a flange 532.
Is fixed to the plate 402 with bolts and nuts 536 and is held by the non-raised lower mount 400. As a result, the jack-up means 500 is supported by the non-raised lower mount 400.

The support member 5 is provided on the outer surface of the bottom plate of the motor mount 502.
37 is suspended, and the supporting member 537 is a horizontal member 538.
Is fixed to the lower main pillar material Y which cannot be raised. Thereby, the jack-up means 500 is supported not only at the intermediate portion but also at the lower end. Therefore, the horizontal force applied to the jack-up means 500 is borne by the non-raised lower mount 400 and the horizontal member 538,
As compared to the case where the non-raised lower pedestal 400 alone bears, the twisting force applied to the non-raised lower pedestal 400 by the horizontal force can be reduced.

5 and 6, 539 is a proximity sensor for detecting the position of the ball screw nut 521, 540.
Is a relay box for electrical wiring of the proximity sensor 539, and 541 is a relay box for electrical wiring of the proximity sensor 539, the electric motor 508 and the like.

Next, the method of use will be described. First, after drilling the upper main pillar material X that can be raised and the lower main pillar material Y that cannot be raised, the upper main pillar material X and the lower main pillar material Y are drilled. Then, the upper main pillar material gripping means 100 and the lower main pillar material gripping means 300 are attached.

Next, four stretchable chevron steels 201 of the upper pedestal 200 are fixed to the upper main pillar material gripping means 100 and assembled in a cross beam shape, and the plates 202 are fixed to the four corners.

Next, four stretchable chevron steels 401 of the non-raised lower pedestal 400 are fixed to the lower main pillar material gripping means 300 and assembled in a cross beam shape, and plates 402 are fixed to the four corners.

Next, the intermediate bracket 503 of the jack-up means 500 is brought into contact with the plate 402 and fixed by the bolts and nuts 536, and the jack-up means 500 is fixed.
Is raised and supported by the lower pedestal 400. Further, the supporting member 537 is fixed to the lower main pillar member Y which cannot be raised by the horizontal member 538.

Next, the electric motor 508 is operated to raise the ball hollow spline shaft 522 and raise the upper joint 523 to raise the plate 202 of the upper mount 200.
Then, the jack-up means 500 is raised and supported by the upper pedestal 200 by fixing it with bolts and nuts 524. As a result, the load applied to the upper main pillar material X is supported by the jack-up means 500.

Next, the connection between the upper main pillar member X and the lower main pillar member Y is released, and the upper pedestal 200 is lifted by the synchronous operation of the electric motors 508 of the four jack-up means 500. Thereby, the upper main pillar material X is raised, and when the main pillar material for raising the height is inserted and fixed between the upper main pillar material X and the lower main pillar material Y, the height is raised in the middle of the steel tower.

As described above, by fixing the non-raised lower pedestal 400 to the lower main pillar material Y which cannot be lifted through the lower main pillar material gripping means 300, the height is raised in the middle of the steel tower. Therefore, if the strength of the foundation of the existing steel tower is not insufficient even after the required raising, the height of the existing steel tower can be increased without temporarily installing the construction foundation.

The above is the description of the invention as an intermediate tower raising apparatus, but the present invention is not limited to this, and is also an invention of an intermediate tower raising method for raising an intermediate tower. That is, the lifted upper pedestal 200 is fixed to the lifted upper main pillar member X via the upper main pillar member gripping means 100, and the non-raised lower mount member 400 is fixed to the lower main pillar member Y which cannot be lifted. Is fixed via the lower main pillar material gripping means 300, and the ball
If the empty spline nut 504 is inserted and fixed,
The guide bearing 505 and the thrust bearing 506 are provided at the lower end.
The bearing case 507 with is attached and fixed
A guide bearing 505 and a thrust member are provided in a cylindrical outer cylinder 501.
The bearing case 50, which is supported by the bearing 506.
7 installed in the motor mount 502 fixed to the
Rotation of the motion motor 508 causes couplings 509, 5
01, the ball screw shaft 51 rotating through the speed reducer 510
2 and the ball screw shaft 512, and the ball screw shaft 51
Ball screw nut 521 that moves up and down with the rotation of 2
And the ball screw nut 521 is inserted and fixed at the lower end.
While protruding from the upper end of the outer cylinder 501 to the upper end
Ball hollow spliner with joint 523 fixed
Rotation is blocked by the unit 504, and at the same time it moves up and down
The ball hollow spline shaft 522 guided in the direction
Outer cylinder 5 of four jack-up means 500 placed
The middle part of 01 is lifted up and fixed to one corner of the lower mount 400
When fixed to the intermediate bracket 503 of the split cylinder
Together, the upper jaws of the four jackup means 500 are
Raise the int 523 and connect it to the four corners of the upper mount 200
And, after solving the connection of the upper main column member X and the lower main column member Y,
By the synchronous operation of the electric motors 508 of the four jack-up means 500, the lifting upper pedestal 200 and the upper main pillar material X are lifted, and the main pillar for raising between the upper main pillar material X and the lower main pillar material Y. This is a method of raising the tower intermediate height by inserting and fixing the material.

When the supporting member 537 is suspended from the motor pedestal 502 constituting the jack-up means 500, the four jack-up means 500 are not lifted and fixed to the four corners of the lower pedestal 400. The supporting member 537 is fixed to the lower main pillar member Y which cannot be raised by the horizontal member 538.

Also according to this method, the height of the existing steel tower can be increased without temporarily constructing the construction foundation.

The upper main pillar material gripping means 100, the lifted upper pedestal 200, the lower main pillar material gripping means 300, the non-raised lower pedestal 400, and the jack-up means 500 are basically the same as those described above. The angled steel 201 that constitutes the lifted upper pedestal 200 and the angled steel 4 that constitutes the non-raised lower pedestal 400
Instead of 01, a single angle steel may be used and dimensioned on site. Also, the upper main pillar material gripping means 10
The fixing member 101 forming 0 or the fixing member 301 forming the lower main pillar material gripping means 300 may be manufactured on site in accordance with the corrobi of the upper main pillar material X or the lower main pillar material Y.

[0043]

As described above, the present invention is
Raised upper pedestal fixed to the upper main pillar material to be raised via the upper main pillar material gripping means and non-raised to be fixed to the lower main pillar material not to be raised via the lower main pillar material gripping means Lower mount and ball hollow spline nut on top
Is inserted and fixed, and the guide bearing and
And the bearing case with the thrust bearing installed are inserted and fixed.
The guide bearing and the slide are
Supported by last bearing and fixed in bearing case
Rotation of the electric motor located in the installed motor mount
By coupling, ball rotating through reducer
Screw the screw shaft and the ball screw shaft,
A ball screw nut that moves up and down with rotation and a lower end
While the ball screw nut is inserted and fixed,
At the upper end, protruding from the upper end of the outer cylinder, the raised upper mount
The upper joint fixed to one corner of the
The hollow hollow spline nut prevents rotation and
Ball hollow splines sometimes guided in up and down direction
The shaft and the non-raised lower frame
In front of the middle bracket of a split cylinder fixed to one corner of the table
It is composed of four jack-up means to which the middle part of the outer cylinder is fixed , and the above-mentioned lift-up upper pedestal is lifted by the synchronous operation of the electric motors of these four jack-up means. Therefore, by fixing the non-raised lower mount to the lower main pillar that cannot be lifted through the lower main pillar gripping means, the padding is performed in the middle of the steel tower. Therefore, according to the present invention, it is possible to obtain the effect that the height of the existing steel tower can be increased without temporarily installing the construction foundation.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of an upper main pillar material gripping means and a raised upper pedestal that constitute the present invention.

FIG. 3 is a partial perspective view of the upper main pillar material gripping means and the elevated upper pedestal that constitute the present invention.

FIG. 4 is a plan view of a lower main pillar material gripping means and a non-raised lower mount which constitute the present invention.

FIG. 5 is a sectional view of the upper portion of the jack-up means that constitutes the present invention.

FIG. 6 is a partial cross-sectional view of the lower portion of the jack-up means that constitutes the present invention.

7A and 7B are views showing an intermediate bracket of the jack-up means constituting the present invention, FIG. 7A is a front view, and FIG. 7B is a sectional view taken along line CC of FIG.

FIG. 8 is a schematic front view showing a conventional technique.

9 is a rear omitted cross-sectional view as seen from AA in FIG.

[Explanation of symbols]

X Upper main pillar material that can be raised Y Lower main pillar material that cannot be raised 100 Upper main pillar material gripping means 200 Raised upper mount 300 Lower main pillar material gripping means 400 Non-raised lower mount 500 jack up means

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 57-77761 (JP, A) JP 53-69437 (JP, A) JP 8-28096 (JP, A) JP 63- 46219 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04H 12/00-12/34 E04G 23/06 B66C 23/28 H02G 1/02

Claims (12)

(57) [Claims] 1. An elevated upper pedestal fixed to an elevated upper main pillar material through an upper main pillar material holding means, and fixed to a lower main pillar material that cannot be raised through a lower main pillar material holding means. The non-raised lower mount and the ball hollow
The planer nut is inserted and fixed, and the lower end
Bearing case with guide bearing and thrust bearing mounted on
Is inserted and fixed in the cylindrical outer cylinder.
A shaft supported by the bearing and the thrust bearing
The electric power supply installed in the motor frame fixed to the receiving case
Through the coupling and speed reducer by the rotation of the dynamic motor
The rotating ball screw shaft is screwed onto the ball screw shaft,
Ball screwer that moves up and down as the ball screw shaft rotates
And the ball screw nut is inserted and fixed at the bottom
And the upper end of the outer cylinder,
The upper joint fixed to one corner of the lifted upper mount is fixed.
Fixed and rotated by the ball hollow spline nut
Balls that are blocked and are simultaneously guided in the vertical movement direction
The hollow spline shaft is arranged and
The middle of a split cylinder fixed to one corner of the raised lower mount
An intermediate tower raising device for lifting the upper pedestal by the synchronous operation of the electric motors of the four jacking means, in which the middle part of the outer cylinder is fixed to the bracket. 2. The upper main pillar material gripping means includes a fixing member fixed to the upper main pillar material to be raised by bolts and nuts.
The steel tower intermediate raising device according to claim 1, which is composed of the fixing member and a fixing member fixed to the raised upper mount with bolts and nuts. 3. The elevated top mount is constructed by assembling four expandable and contractable chevron-shaped steels in a cross girder shape, arranging plates at the four corners and fixing them with bolts and nuts. Item 2. Tower tower intermediate raising device 4. The lower main pillar material gripping means is fixed to the lower main pillar material that cannot be raised by a fixing member with bolts and nuts, and is fixed to the fixing member and the non-raised lower mount with bolts and nuts. It is comprised from a fixed member.
To the intermediate tower raising device according to claim 3. 5. The non-raised lower mount is constructed by assembling four expandable and contractable chevron-shaped steels in a cross beam shape, arranging plates at the four corners and fixing them with bolts and nuts. The tower intermediate raising apparatus according to claim 4. 6. A support member is hung on the outer surface of the bottom plate of the motor mount.
And the supporting member cannot be lifted up via the horizontal member.
The steel tower intermediate raising apparatus according to any one of claims 1 to 5, which is fixed to the lower main pillar material. 7. Raising the upper main pillar material to be raised
When the upper mount is fixed via the upper main pillar material gripping means,
In addition, on the lower main pillar material that cannot be raised,
Fix the table through the lower main pillar material gripping means,
The hollow spline nut is inserted and fixed.
, The shaft with the guide bearing and thrust bearing installed at the lower end
When the receiving case is inserted and fixed, the front
Supported by the guide bearing and the thrust bearing
Located inside the motor mount that is fixed to the bearing case
By the rotation of the electric motor
And a ball screw shaft that rotates through
And a ball that moves up and down as the ball screw shaft rotates.
Screw nut and the ball screw nut at the lower end
Is fixed and the upper end projects from the upper end of the outer cylinder.
And the upper joint is fixed,
Rotation is prevented by the nut, and the vertical movement
With the ball hollow spline shaft guided in the direction
The middle part of the outer cylinder of the four jack-up means
Divided cylinder fixed to one corner of the non-raised lower mount
Of the four jacks.
The upper joint of the lifting means
The upper main pillar material and the lower main pillar material connected to the four corners of the frame
After uncoupling, connect the four jack-up means
By the synchronous operation of the electric motor,
The platform, the upper main pillar material is raised, and the upper main pillar material and the
Iron for inserting and fixing the main pillar material for raising between the lower main pillar materials
Tower middle raising method 8. The upper main pillar material gripping means is raised.
A fixing member that is fixed to the upper main pillar material with bolts and nuts ,
Secure it to the fixing member and the raised upper frame with bolts and nuts.
The steel tower according to claim 7, which comprises a fixed member that is fixed.
Intermediate raising method 9. The lifting upper mount is composed of four telescopic members.
Assemble the angle steel into a double girder shape and place the plates at the four corners.
8. The structure according to claim 7, wherein the structure is fixed with bolts and nuts.
The tower intermediate raising method according to claim 8. 10. The lower main pillar material gripping means is raised.
Fixing member that is fixed to the lower main pillar material with bolts and nuts
Bolts and nuts on the fixing member and the non-raised lower mount.
8. A fixing member which is fixed by a toe.
To the intermediate tower raising method according to claim 9. 11. The non-raised lower mount is a telescopic 4
The angle steel is assembled into a double girder, and plates are placed at the four corners.
And fixed by bolts and nuts.
To the intermediate tower raising method according to claim 10. 12. A support member is hung on the outer surface of the bottom plate of the motor mount.
Is installed, and the support member is not lifted up via a horizontal member.
Iron fixed to the lower main pillar material according to claim 7 to 11.
Tower middle raising method