JP6910110B2 - How to assemble a tower using a tower assembly jig and a mast for raising the tower assembly jig - Google Patents

Description

The present invention is a method of assembling a steel tower using a steel tower assembling jig and a raising mast fixed to the steel tower assembling jig, particularly, while raising a steel tower installation type steel tower assembling jig in sequence, it is constant. It relates to a method of assembling a steel tower in which a steel tower portion is assembled upward for each unit (section) and a mast for raising a steel tower assembly jig.

Conventionally, as a method of assembling a steel tower, first, the steel tower part from the ground to the second node (second panel) is assembled by a jib crane installed on the ground, and then the inside of the steel tower part assembled up to the second node. In addition to assembling and fixing a tower assembly jig such as a tower assembly derrick consisting of a mast and a boom, using the tower assembly jig, a new third section is placed on the tower part of the second section. Assemble the tower part of the above, and to assemble the tower part after the 4th section, raise and fix the above tower assembly jig to the newly assembled tower part, and use this fixed tower assembly jig to further raise the tower. There is a method of assembling the tower upward by assembling the parts and repeating this section by section.

FIG. 13 shows a steel tower in the middle of assembly in which the conventional steel tower installation jig is installed, and 1 is a steel tower in the middle of assembly, and the steel tower 1 is a jib crane installed on the ground (shown in the figure). For example, the tower portion 1a at the first node and the tower portion 1b at the second node are assembled from the ground.

The above-mentioned fixed unit (section) indicates a steel tower portion of an arbitrary size, and refers to, for example, the size of one panel or the size of two panels.

Reference numeral 2 denotes a conventional mast assembling jig such as a mast assembling derrick fixed in a state of floating from the ground at the center of the second section of the upper part of the tower 1 in the mast portion 1b. The jig 2 is separated from the mast 3, the boom 4 provided on the upper part of the mast 3 so as to be tiltable, the mast base 5 fixed to the lower end of the mast 3, and the mast base 5 at a desired distance. It is composed of two ring-shaped lower mast guides 6 and an upper mast guide 7 that are inserted into the mast 3 above the mast.

Further, the mast base 5 is fixed to the upper part of the steel tower portion 1a of the first node (or the lower part of the steel tower portion 1b of the second node) via the fixing wires 8 radially stretched on a substantially horizontal plane. Further, the two mast guides 6 and 7 are fixed to the upper part of the tower portion 1b via fixing wires 9 and 10 radially stretched on a substantially horizontal plane, respectively.

Then, the mast 3 rises from the ground by the mast base 5 fixed to the lower end of the mast 3 and the mast guides 6 and 7 inserted above the mast base 5 at a desired distance from the mast base 5. You will be able to support it in the same state.

Next, a method of assembling the steel tower portion after the third section using the steel tower assembly jig 2 will be described.

First, as shown in FIG. 14, the tower portion 1c at the third node is assembled using the tower assembly jig 2 fixed to the tower portion 1b at the second node.

Next, in order to assemble the tower portion of the fourth node, as shown in FIGS. 14 and 15, a lifting device such as a lifting tool 11 is used to attach the tower assembly jig 2 to the tower portion 1c of the third node. Raise to and fix.

Specifically, as shown in FIG. 14, the fixing wire 10 fixed to the upper mast guide 7 is removed from the steel tower portion 1b of the second section, and the upper mast guide 7 inserted through the mast 3 is inserted. Is moved to the upper part of the steel tower portion 1c at the third node, which is above the lower mast guide 6 at a desired distance, and the fixing wire 10 fixed to the upper mast guide 7 is radially radially flat. The upper mast guide 7 is fixed to the tower 1 at the tower portion 1c at the third node by being stretched over the tower and fixed to the upper part of the tower portion 1c at the third node.

The desired distance is a distance at which the mast can be stably supported and raised by the two mast guides 6 and 7, and is, for example, a distance corresponding to the height of the steel tower portion of one section. The distance may be shorter than this.

Then, for example, the lifting tool 11 is fixed to the upper part of the tower portion 1c at the third node of the tower 1, and the tip of the pulling wire 11a of the lifting tool 11 is fixed to the mast base 5 to lift the tower. The mast 3 is suspended by the heavy tool 11.

Next, the fixing wire 8 is removed from the mast base 5 and the steel tower 1, and as shown in FIG. 15, the mast 3 is removed by the lifting tool 11, and the mast base 5 of the mast 3 is the lower mast. Raise it until it is located at the lower end of the guide 6.

Then, the fixing wire 8 is fixed to the mast base 5, and the fixing wire 8 is radially stretched on a substantially horizontal plane and fixed to the upper part of the steel tower portion 1b at the second node, whereby the mast is fixed. The base 5 is fixed to the tower 1 at the upper part of the tower portion 1b at the second node.

Further, the fixing wire 9 fixed to the lower mast guide 6 is removed from the steel tower 1, and the lower mast guide 6 inserted through the mast 3 is positioned at the lower end of the upper mast guide 7. The lower mast is raised until the mast guide 6 is lifted, and the fixing wire 9 fixed to the lower mast guide 6 is radially stretched on a substantially horizontal plane and fixed to the upper part of the steel tower portion 1c at the third node. The guide 6 is fixed to the tower 1 at the upper part of the tower portion 1c at the third node.

As a result, the tower assembly jig 2 is fixed to the central portion of the tower portion 1c at the third node, and the mast 3 is at a desired distance from the mast base 5 at the lower end and the mast base 5. It will be supported by the mast guides 6 and 7 inserted above the distance.

Then, the steel tower assembly jig 2 is used to assemble the steel tower portion at the fourth node.

Next, in order to assemble the tower portion of the fifth node, the tower assembly jig 2 fixed to the tower portion 1c of the third node is raised to the tower portion of the fourth node and fixed by the method described above. Then, the tower portion at the 5th node is assembled using the fixed steel tower assembly jig 2, and this is repeated in sequence after the tower portion at the 6th node so that the tower is assembled upward.

Japanese Unexamined Patent Publication No. 2009-133139

However, in the conventional steel tower assembly jig, the upper mast guide 7 is separated from the lower mast guide 6 by a desired distance as shown in FIGS. 13 to 14 before raising the mast 3. Must be located above.

Therefore, as shown in FIG. 13, the position of the boom 4 fixed to the mast 3 needs to be provided above the position where the upper mast guide 7 is raised and fixed later. It is necessary to position it at a place higher than the upper end of the tower portion by h, which has a problem of lacking safety.

The present invention is intended to solve the above problems by allowing the boom to be installed at a low position.

The method of assembling the iron tower using the iron tower assembling jig of the present invention includes a first step of fixing the iron tower assembling jig including a mast and a boom on the upper part of the iron tower portion assembled to a desired height. The lifting mast extending downward is fixed to the mast of the iron tower assembly jig, and the iron tower portion having a desired height is assembled on the assembled iron tower portion by using the iron tower assembly jig. In the second step, the fixing of the steel tower assembly jig and the steel tower portion is released, and the lifting mast is raised by the lifting device to raise the steel tower assembly jig to a desired height. A desired height is further placed on the assembled steel tower portion by using the third step of making the steel tower assembly jig, the fourth step of fixing the steel tower assembly jig to the steel tower portion, and the steel tower assembly jig. It is characterized by consisting of the fifth step of assembling the iron tower part of.

Further, in the method of assembling a steel tower using the jig for assembling a steel tower of the present invention, two ring-shaped mast guides fixed to the upper part of the steel tower portion assembled to a desired height and separated by a desired distance from the top and bottom are provided. By inserting it into the mast of a steel tower assembly jig consisting of a mast and a boom, and fixing at least one of the two mast guides to the mast, the steel tower assembly jig can be placed on the upper part of the steel tower portion. In the first step of fixing the tool, the raising mast extending downward is fixed to the mast of the tower assembly jig, and the tower assembly jig is used to put it on the assembled tower portion. In the second step of assembling the tower portion of a desired height, the fixing of the mast of the tower assembly jig and the mast guide is released, and the lifting mast is raised by the lifting device. The third step of guiding the mast and the lifting mast by the two mast guides fixed to the tower from above to raise the jig for assembling the tower to a desired height, and the mast guide fixed to the tower. The other mast guide on the upper side, which is further separated from the mast guide on the uppermost part by a desired distance, is fixed to the tower portion, and the mast guide on the uppermost part and the other mast guide on the upper side are fixed. By fixing at least one of the mast guides to the mast, the steel tower assembly jig is fixed to the steel tower portion in the fourth step, and the steel tower assembly jig is used for the above assembly. It is characterized by further comprising a fifth step of assembling a steel tower portion having a desired height on the steel tower portion.

Further, it is characterized by further having a sixth step of repeating the third step to the fifth step one or more times.

Further, the raising mast of the steel tower assembly jig of the present invention is lifted by a lifting device each time a steel tower portion having a desired height is assembled, and is further desired on the assembled steel tower portion. A rod-shaped lifting mast that extends downward and is fixed to the lower end of the tower after a tower assembly jig consisting of a mast and a boom that assembles the tower portion of height is assembled and fixed to the tower portion. The lifting device is connected to the lifting mast, and the lifting device raises the lifting mast to raise the tower assembly jig.

Further, the mast for raising the iron tower assembly jig of the present invention is lifted by the lifting device each time the iron tower portion having a desired height is assembled, and is further desired on the assembled iron tower portion. A steel tower assembly jig consisting of a vertically suspended tubular mast and a boom provided on the upper part of the mast for assembling the high steel tower portion is assembled and fixed to the steel tower portion, and then the lower end of the mast is assembled. A tubular rod-shaped mast that extends axially from the upper end to the lower end, has a slit that communicates between the inside and the outside, and extends downward, and is installed on the ground to operate the boom. The operation wire of the winch penetrates the inside of the tubular mast via a fulcrum provided directly under the mast of the steel tower assembly jig and is connected to the boom. The slit allows the operation wire to be inserted and fixed to the lower end of the mast of the steel tower assembly jig, and the lifting device is connected to the lifting mast by the lifting device. , by raising the mast for the elevated, the tower assembly jig is characterized that you increase.

According to the tower assembly jig of the present invention, by using the raising mast, it is not necessary to install the boom of the tower assembly jig fixed to the tower portion at a high position, so that safety is required when assembling the tower. Can be enhanced.

Further, since the tubular mast for raising is provided with a slit, it can be easily attached to the mast.

It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is a longitudinal sectional view of the mast for raising of the present invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the steel tower assembly jig of this invention. It is explanatory drawing of the steel tower assembly method using the conventional steel tower assembly jig. It is explanatory drawing of the steel tower assembly method using the conventional steel tower assembly jig. It is explanatory drawing of the steel tower assembly method using the conventional steel tower assembly jig.

Examples of the present invention will be described below with reference to the drawings.

(Assembly process of the tower part of the 1st and 2nd sections)

As shown in FIG. 1, in order to assemble the tower 1, first, a tower portion having a desired height, for example, the tower portions 1a and 1b from the ground to the second node is assembled by using a jib crane 12 installed on the ground.

(Installation process of jig for tower assembly)

Next, as shown in FIG. 2, for example, a steel tower assembly jig 13 is placed at the center of the upper portion of the steel tower portion assembled to the desired height, such as the steel tower portion 1b at the second node, and the lower end thereof is above the ground. Assemble and fix it in a state separated from.

The steel tower assembly jig 13 is inserted through a vertically suspended tubular rod-shaped mast 14, a boom 15 provided on the upper part of the mast 14 so as to be tiltable, and a lower end portion of the mast 14, and the mast 14 is inserted. It is composed of a ring-shaped mast guide 16 for fixing the mast guide 16 and a ring-shaped mast guide 17 for being inserted into the mast 14 above the mast guide 16 at a desired distance.

The desired distance is a distance at which the mast can be stably supported by the two mast guides 16 and 17, and as will be described later, the mast 14 inserted through the two mast guides 16 and 17 is raised. In this case, it is a distance that can be stably climbed, for example, a distance corresponding to the height of the mast portion of one section, but may be shorter than this.

The mast guide 16 is fixed to, for example, the upper part of the steel tower portion 1a of the first node (or the lower part of the steel tower portion 1b of the second node) via a fixing wire 18 radially stretched on a substantially horizontal plane. Further, the mast guide 16 is inserted into the mast 14 and fixed to the mast 14.

Further, the mast guide 17 is fixed to, for example, the upper end of the steel tower portion 1b at the second node via a fixing wire 19 radially stretched on a substantially horizontal plane, and the mast guide 17 is the above. A mast 14 is inserted to hold the mast 14.

Then, the mast 14 has the lower end of the mast 14 on the ground by the mast guide 16 fixed to the lower end of the mast 14 and the mast guide 17 inserted above the mast guide 16 at a desired distance. It will be able to be stably supported while being separated from the mast.

Instead of fixing the mast 14 to the mast guide 16, the mast 14 may be fixed to at least one of the mast guide 16 and the mast guide 17.

Reference numeral 20 denotes a winch installed on the ground outside the steel tower for vertically moving the boom 15 via the operation wire 20a. Then, the operation wire 20a extends from the winch 20 and penetrates the inside of the tubular mast 14 via, for example, a fulcrum 20b provided directly under the mast 14, and is connected to the boom 15. ing.

A wire (not shown) that moves the hook 15a provided at the tip of the boom 15 up and down may also be allowed to move up and down using the winch 20, and the wire also extends from the winch 20. Then, for example, the tubular mast 14 is penetrated through the fulcrum 20b and connected to the hook 15a.

Reference numeral 21 denotes an auxiliary guide, which is inserted between the mast guide 16 and the mast guide 17 and fixed to the mast 14 at the upper part of the steel tower portion 1b of the second node. It is suspended by a fixed radially extending fixing wire 22. The auxiliary guide 21 and the fixing wire 22 may be omitted.

(Raising mast fixing process)

Next, as shown in FIGS. 3 to 5, a downwardly extending mast 23 for raising is fixed to the lower end of the mast 14 of the tower assembly jig 13 fixed to the tower portion 1b at the second section.

The lower end of the raising mast 23 is attached in a state of being in contact with the ground or separated from the ground.

Further, the raising mast 23 is formed, for example, by connecting and fixing three tubular rod-shaped mast elements 23a, 23b, 23c, and as shown in FIGS. 3 to 5, first, the lower end of the mast 14 is formed. By fixing the rod-shaped mast element 23a to the lower end of the rod-shaped mast element 23a, then fixing the rod-shaped mast element 23b to the lower end of the rod-shaped mast element 23a, and finally fixing the rod-shaped mast element 23c to the lower end of the rod-shaped mast element 23b. , The raising mast 23 is fixed to the lower end of the mast 14.

Further, as shown in FIG. 6, the raising mast 23 has a slit 24 extending in the axial direction from the upper end to the lower end and communicating with the inside and the outside, and is formed in a cylinder having a C-shaped cross section. There is.

Then, by having such a slit 24, the raising mast 23 can be fixed to the lower end of the mast 14 by inserting the operation wire 20a or the like already provided in the steel tower 1.

Although the raising mast 23 is divided into three parts, it may be composed of one mast element without division, or a rod-shaped mast element divided into two parts and four or more parts.

Next, a method of assembling the steel tower portion after the third section using the steel tower assembly jig 13 will be described.

(Assembly process of the tower part of the third section)

First, as shown in FIG. 7, the tower portion 1c of the third node is placed on the tower portion 1b of the second node of the tower 1 by using the tower assembly jig 13 fixed to the tower portion 1b of the second node. assemble.

(The process of ascending the tower assembly jig from the 2nd to 3rd sections to the tower part)

Next, in order to assemble the tower portion of the fourth node, as shown in FIGS. 7 and 8, for example, for assembling the tower fixed to the tower portion 1b of the second node by using a lifting device such as the winch 20. The jig 13 is raised to the steel tower portion 1c at the third node and fixed.

Specifically, as shown in FIG. 7, all the mast guides 16 and 17 fixed to the mast 14, the auxiliary guides 21 and the mast 14 are released from being fixed, and the mast guides 16 and 17 and the auxiliary guides are released. 21 is only inserted into the mast 14, and a lifting wire 25 extending from the winch 20, for example, is fixed to the lower end of the lifting mast 23, and the lifting wire 25 is used to fix the mast. 14 is in a suspended state.

The lifting wire 25 of the winch 20 installed on the ground extends from the winch 20 and is above the portion where the mast guide 16 is located (or above the position where the lower end of the mast 14 is pulled up). ), It is connected and fixed to the lower end of the raising mast 23 via the fulcrum 26 provided in the steel tower portion.

Instead of using the winch 20 installed on the ground, a lifting device (not shown) such as a winch is separately provided at the fulcrum 26, and the lifting wire extending from the lifting device is directly attached to the fulcrum 26. It may be connected to the lower end of the raising mast 23.

It should be noted that, above the mast guide 17 which is the upper mast guide of the mast guides 16 and 17, another mast guide 27 on the upper side which is inserted into the mast 14 and fixed to the mast 14 is provided in advance. Further, later, the fixing wire 28 for fixing the other mast guide 27 on the further upper side at a position above the mast guide 17 at a desired distance, for example, at the upper position of the steel tower portion 1c at the third node is loosened. In this state, it may be fixed to the other mast guide 27 on the upper side and the upper part of the steel tower portion 1c at the third node.

Then, as shown in FIG. 8, the raising mast 23 is raised by using the winch 20 until the lower end of the raising mast 23 is located at the mast guide 16.

Then, the mast 14 and the mast 23 for raising are guided by the mast guide 16 and the mast guide 17 inserted above the mast guide 16 at a desired distance from the mast guide 16 so as to stably rise. become.

Then, after the mast 14 has risen to the desired distance, the mast 14 and the mast guide 17 are fixed.

Further, the other mast guide 27 on the upper side is inserted into the mast 14 at a desired distance from the mast guide 17, and the fixing wire 28 is tensioned, thereby causing the mast guide. 27 is fixed at the upper end of the mast portion 1c at the third node, for example, via the fixing wire 28 radially stretched on a substantially horizontal plane.

Further, as shown in FIG. 9, the mast guide 16, the fixing wire 18, the auxiliary guide 21, and the fixing wire 22 are removed from the mast 14 and the steel tower 1, respectively. It should be noted that these need not be removed if they do not interfere with the later raising of the raising mast 14.

Then, the mast 14 is stably supported by the mast guide 17 fixed to the lower end of the mast 14 and the mast guide 27 inserted above the mast guide 17 at a desired distance from the mast guide 17. Become.

Instead of fixing the mast 14 to the mast guide 17, the mast 14 may be fixed to at least one of the mast guide 17 and the mast guide 27.

Further, the removed auxiliary guide 21 is inserted between the mast guide 17 and the mast guide 27 into the mast 14, and the mast 14 is fixed, and is fixed so as to extend radially to the upper part of the steel tower portion 1c at the third node. It may be suspended by the wire 22. The auxiliary guide 21 and the fixing wire 22 may be omitted.

(Assembly process of the tower part of the 4th section)

Next, as shown in FIG. 10, using the tower assembly jig 13 fixed to the tower portion 1c at the third node, the tower portion 1d at the fourth node is placed on the tower portion 1c at the third node of the tower 1. To assemble.

(The process of ascending the tower assembly jig from the 3rd to 4th sections to the tower part)

Next, in order to assemble the tower portion of the fifth node, as shown in FIG. 11, as shown in FIG. The fixed steel tower assembly jig 13 is raised to the steel tower portion 1d at the fourth node and fixed.

That is, as shown in FIGS. 10 and 11, all the mast guides 17 and 27 and the auxiliary guides 21 and the mast 14 fixed to the mast 14 are released, and the mast guides 17 and 27 and the auxiliary guides are released. The mast 21 and the mast 14 are inserted into the mast 14, and the mast 23 for raising is raised by the winch 20 via the lifting wire 25, and the mast guide fixed to the steel tower 1 is viewed from above. The two mast guides 17 and 27 guide the mast 14 and the raising mast 23 to raise the steel tower assembly jig 13.

Then, another mast guide 29 on the upper side, which inserts the upper mast 14 further separated from the mast guide 27 which is the uppermost mast guide fixed to the steel tower 1 by a desired distance, is radially stretched on a substantially horizontal plane. At least one mast guide of the uppermost mast guide 27 and the other mast guide 29 on the upper side is fixed to the upper part of the steel tower portion 1d at the fourth node via the erected fixing wire 30. By fixing to the mast 14, the tower assembly jig 13 is fixed to the tower 1.

Further, as shown in FIG. 12, the mast guide 17, the fixing wire 19, the auxiliary guide 21, and the fixing wire 22 are removed from the mast 14 and the steel tower 1, respectively. It should be noted that these need not be removed if they do not interfere with the later raising of the raising mast 14.

Then, the mast 14 can be stably supported by the two mast guides 27 and 29 fixed to the steel tower from above.

(Assembly process of the tower part at the 5th section)

Then, using the tower assembly jig 13 fixed to the tower portion of the fourth node, the tower portion of the fifth node is assembled on the tower portion of the fourth node.

(Repeat process)

After that, as for the assembly of the tower part at the 6th node, the tower assembly jig is applied to the tower part at the 4th to 5th nodes in the same manner as the step of ascending the tower assembly jig from the 3rd node to the 4th node. Move and fix, assemble the tower part at the 6th section using the tower assembly jig, and then repeat the tower assembly jig raising process and the tower assembly process as many times as necessary to build the tower. Try to assemble up to the top.

According to the tower assembly jig of the present invention, by using the raising mast, it is not necessary to install the boom of the tower assembly jig fixed to the tower portion at a high position, so that safety is required when assembling the tower. Can be enhanced.

1 Iron tower 1a Iron tower part 1b Iron tower part 1c Iron tower part 1d Iron tower part 2 Iron tower assembly jig 3 Mast 4 Boom 5 Mast base 6 Mast guide 7 Mast guide 8 Fixing wire 9 Fixing wire 10 Fixing wire 11 Lifting tool 11a Pulling wire 12 Jib crane 13 Steel tower assembly jig 14 Mast 15 Boom 15a Hook 16 Mast guide 17 Mast guide 18 Fixing wire 19 Fixing wire 20 Winch 20a Operation wire 20b Auxiliary guide 22 Fixing wire 23 Lifting mast 23a Mast element 23b Mast element 23c Mast element 24 Slit 25 Lifting wire 26 Mast guide 27 Mast guide 28 Fixing wire 29 Mast guide 30 Fixing wire

Claims (4)

The first process of fixing the tower assembly jig consisting of the mast and boom to the upper part of the tower assembled to the desired height,
The raising mast extending downward is fixed to the mast of the tower assembly jig, and the tower portion having a desired height is placed on the assembled tower portion by using the tower assembly jig. The second process of assembling and
The third step of releasing the fixing between the tower assembly jig and the tower portion and raising the lifting mast by the lifting device to raise the tower assembly jig to a desired height. ,
The fourth step of fixing the tower assembly jig to the tower portion, and
Using the steel tower assembly jig, a steel tower assembly jig characterized by a fifth step of assembling a steel tower portion having a desired height on the assembled steel tower portion was used. How to assemble a steel tower. Two ring-shaped mast guides fixed to the upper part of the tower portion assembled to a desired height and separated by a desired distance at the top and bottom are inserted into the mast of the tower assembly jig consisting of the mast and the boom, and the above The first step of fixing the tower assembly jig to the upper part of the tower portion by fixing at least one of the two mast guides to the mast, and
The raising mast extending downward is fixed to the mast of the tower assembly jig, and the tower portion having a desired height is placed on the assembled tower portion by using the tower assembly jig. The second process of assembling and
The mast of the steel tower assembly jig and the mast guide are released, and the lifting device raises the mast for lifting, and the mast and the two mast guides fixed to the steel tower are used to lift the mast and the mast guide. The third step of guiding the lifting mast to raise the steel tower assembly jig to a desired height, and
Among the mast guides fixed to the tower, another mast guide on the upper side for inserting the upper mast further separated from the uppermost mast guide by a desired distance is fixed to the tower portion, and the uppermost mast is fixed. A fourth step of fixing the tower assembly jig to the tower portion by fixing the guide and at least one of the other mast guides on the upper side to the mast.
Using the steel tower assembly jig, a steel tower assembly jig characterized by a fifth step of assembling a steel tower portion having a desired height on the assembled steel tower portion was used. How to assemble a steel tower. The method for assembling a steel tower using the steel tower assembling jig according to claim 1 or 2, further comprising a sixth step in which the third step to the fifth step are repeated one or a plurality of times. Each time a tower portion of a desired height is assembled, it is lifted by a lifting device to further assemble a tower portion of a desired height on the assembled tower portion, with an erected tubular mast. A steel tower assembly jig including a boom provided on the upper part of the mast is assembled and fixed to the steel tower portion, and then fixed to the lower end of the mast.
A tubular rod-shaped mast that extends in the axial direction from the upper end to the lower end and has a slit that communicates between the inside and the outside, and extends downward.
The operation wire of the winch installed on the ground for operating the boom penetrates into the tubular mast via a fulcrum provided directly under the mast of the tower assembly jig, and becomes the boom. Concatenated,
The raising mast is formed by the slit so that the operating wire can be inserted and fixed to the lower end of the mast of the tower assembly jig.
The tower assembly jig is characterized in that the lifting device is connected to the lifting mast, and the lifting device raises the lifting mast to raise the tower assembly jig. A mast for raising the ingredients.

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