JP7245098B2 - Relocation method of mast guide device for tower assembly work - Google Patents

Description

The present invention relates to a derrick which is installed at the center of a steel tower during assembly or dismantling in order to lift and unload materials during assembly and dismantling work of the steel tower, and whose mounting height position relative to the steel tower can be changed. The present invention relates to a mast guide device that guides the raising and lowering of the mast while maintaining it.

As a derrick used for construction work for assembling and dismantling steel towers, there is one disclosed in Patent Document 1, for example. This derrick comprises a mast supported by four steel tower main pillars at the center of a steel tower that is being assembled or dismantled, and a boom provided at the upper end of the mast. At its lower end, the mast is supported by horizontal and oblique support lines on the main pillars of the pylon on all four sides via a pedestal, and on the main pillars of the pylon on all four sides by horizontal support lines via multiple mast guides that surround the mast in the middle. supported to stand upright. By winding and unwinding the hoisting wire, which is wound around pulleys on the pedestal and the main pillars of the steel tower, with a winch on the ground, the supporting position of the mast on the steel tower can be moved up and down. The mast is rotatably supported on the pedestal and driven to rotate by a motor. The mast guide is composed of inner and outer double annular members that are relatively rotatable, and the outer annular member is supported by the main pillars of the steel tower via horizontal support lines. The inner annular member has four elevating rollers for vertically rollingly receiving the four main pillars of the mast, and is horizontally rotatable together with the mast.
When installing the derrick inside the main pillar of the steel tower, the pedestal at the lower end of the mast is fixed to the main pillar of the steel tower with horizontal and diagonal braces. Affix to material. In this state, the derrick is operated to assemble and dismantle the steel tower.
The mast is raised or lowered according to the progress of the assembly work of the steel tower. In this case, with the load of the mast supported by the lifting wire, after removing the slanted support line and the horizontal support line that support the lower end of the mast from the main pillar material of the tower, the lifting wire is hoisted or unwound to lift the mast. is raised or lowered to a predetermined height position. At that time, the mast is guided by the mast guide so as to maintain its upright position. After the mast has been raised or lowered to a predetermined position, the pedestal of the mast is supported on the steel tower main pillars at that position by the horizontal support line and the oblique support line. The position of the pulley on the steel tower main column material to which the lifting wire is hung is also moved to the appropriate position. After raising or lowering the mast, remove the horizontal support line of the mast guide from the main pillar of the steel tower, lift or lower the mast guide to the required position of the mast using a traction device, etc., and at that position, reconnect the horizontal support line to the steel tower. Support the main pillars. At this time, the worker moves from the steel tower side to the mast guide side to perform the work.

JP 2017-119571 A

When assembling or dismantling a steel tower using the above-described conventional derrick, there is a dangerous and difficult task in which a worker frequently moves back and forth between the steel tower and the mast guide at a high place. Lifting and lowering the mast guide is also a laborious and difficult task.
Therefore, the present invention provides a mast guide device that eliminates the need for workers to frequently move between the steel tower and the mast guide during assembly or dismantling work of the steel tower, thereby omitting lifting and lowering work. The purpose is to provide a method of relocating the mast guide.

The following description refers to the reference numerals in the attached drawings, but the present invention is not limited thereto.
In order to solve the above problems, the mast guide devices 7 and 8 of the present invention surround the middle portion of the mast 3 so as to be able to move up and down relative to each other, and are supported by the main pillars P of the steel tower by means of horizontal support lines 9 and 10. 3 is held vertically relative to the steel tower T so that the mast 3 can be moved up and down relatively. An annular frame 14 surrounds the mast 3 so that it can move up and down relatively. Four guide rollers 15 are provided on the annular frame 14, and a stopper 16 . The guide rollers 15 protrude inside the annular frame 14 and are provided so as to roll vertically on the outsides of the four main mast pillars 3 a to 3 d that constitute the mast 3 . The stopper 16 is movable between a restraining position in contact with the outside of the main mast poles 3a to 3d and a release position away from the main mast poles 3a to 3d. It is provided to fix the annular frame 14 to the mast 3 in the position and to allow relative vertical movement of the annular frame 14 with respect to the mast 3 in the released position. One end of the horizontal branch lines 9 and 10 is connected to the stopper 16, and when the other end is locked to the steel tower main pillar P with a predetermined tension, the stopper 16 is moved to the release position against the biasing force of the spring 17. provided to be placed in the
In order to solve the above problems, the method of relocating the mast guide devices 7, 8 of the present invention provides a method of moving the mast guide devices 7, 8 supported by the mast guide devices 7, 8 supported via horizontal branch lines 9, 10 at their original positions on the steel tower T. A first step of lowering the mast 3 from the original position to a lower position a predetermined distance below the steel tower before lifting the mast 3 from the original position to a predetermined upper position; 9 and 10 are unsupported from the steel tower main pillar material P, and the stoppers 16 of the mast guide devices 7 and 8 are arranged at the restricted position, so that the mast guide devices 7 and 8 at the original position are moved from the mast at the lowered position. 3, and then, with the fixed mast guide devices 7 and 8, the mast 3 in the lowered position is lifted to the original position, thereby moving the mast guide devices 7 and 8 to the original position. a third step of moving the mast guide devices 7 and 8 from the upper position to an upper position; and a fourth step of freeing the mast guide device 7, 8 relative to the mast 3 by placing the stop 16 of 8 in the release position.

The mast guide devices 7 and 8 of the present invention can be engaged and disengaged from the mast 3 by manipulating the horizontal branch lines 9 and 10 from the steel tower T side according to the method of the present invention. Together with this, the mast guide devices 7 and 8 can be arranged at desired positions on the mast 3 . Therefore, the operation of lifting and lowering the mast guide devices 7 and 8 from above the mast 3 can be omitted.

1 is a schematic illustration of a derrick device according to the present invention; FIG. 2 is a schematic illustration of a portion of the derrick apparatus of FIG. 1; FIG. FIG. 2 is a front view of a derrick body in the derrick device of FIG. 1; 4 is a schematic plan view showing the relationship between the mast and boom of the derrick body of FIG. 3; FIG. 2 is a front view of the lower end of the mast in the derrick device of FIG. 1; FIG. 2 is a plan view of the lower end of the mast in the derrick apparatus of FIG. 1; FIG. FIG. 2 is a plan view of a mast guide device in the derrick device of FIG. 1; Figure 8 is a front view of part of the mast guide apparatus of Figure 7; Figure 8 is a cross-sectional view of a portion of the mast guide apparatus of Figure 7; It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. It is explanatory drawing which shows the process of the steel tower assembly work using a derrick apparatus. FIG. 4 is a schematic illustration of a derrick device according to another embodiment of the present invention;

Embodiments of the present invention will be described with reference to the drawings.
1 and 2, the derrick device 1 comprises a derrick body 2 consisting of a truss column-shaped mast 3 and a boom 4 supported on the top of the mast 3 so as to be able to rise and fall.
The mast 3 is vertically supported at the center of the steel tower T that is being assembled or dismantled. The steel tower T has first to fourth four steel tower main pillars P (P1, P2, P3, P4) (Fig. 2), and has already been assembled up to the second section S2, and the third section S3 is The derrick device 1 is used to assemble from this.

As well shown in FIG. 3, the mast 3 is composed of truss columns and has four main mast columns 3a, 3b, 3c and 3d. Freely support. As shown in FIG. 4, the upper part of the mast 3 above the swivel pedestal 18 is open to the side in a U-shape in plan view. are unified over the entire length. Therefore, with the boom 4 erected, the mast 3 can pass through the mast guide devices 7 and 8 over its entire length without any trouble.

1 and 2, the mast 3 is supported at its lower end by a horizontal support line 5 and an oblique support line 6 on the steel tower main pillar material P, and at its intermediate portion via an upper mast guide device 7 and a lower mast guide device 8. It is supported by the steel tower main pillar material P by horizontal branch lines 9 and 10 . The mast guide devices 7 and 8 surround the mast 3 so that it can move up and down relatively.

When the work is performed using the derrick device 1, the upper mast guide device 7 is supported by the upper end of the assembled steel tower main column material P (the upper end of the second section in FIG. 1), and the lower end of the mast 3 is horizontal. It is supported by the steel tower T with the branch line 5 and the oblique branch line 6 . The upper portion of the mast 3 is arranged to extend upward from the upper mast guide device 7 to a height within a predetermined distance regulated for safety.

The oblique branch line 6 is composed of two wire ropes that also serve as lifting wires 6 a and 6 b for the mast 3 . One ends of the lifting wires 6a and 6b are wound around a winch W on the ground, an intermediate portion is hung on a lifting pulley 11 on the top of the steel tower main pole P, and the other end is locked to the main pole P, Support mast 3. By winding and unwinding the lifting wires 6a and 6b, the supporting position of the mast 3 with respect to the steel tower T can be moved up and down.

As shown in FIGS. 5 and 6, a pedestal 12 is provided at the lower end of the mast 3 . On the pedestal 12, pulls 19 for locking the mast pulleys 13 (13a, 13b, 13c, 13d) and the horizontal branch line 5 are provided at the four corners. Lifting wires 6 a and 6 b are hung on the mast pulley 13 .

In FIG. 2, the lifting wire 6a is locked from the winch W to the main steel tower P3 via the lifting pulley 11a on the main steel tower P1 and the mast pulleys 13a and 13c. The lifting wire 6b is locked to the main tower P4 from the winch W via the lifting pulley 11b on the main tower P2 and the mast pulleys 13b and 13d. In order to reduce the load, as shown in FIG. It is also possible to employ roping that engages near the engaging positions of the lifting pulleys 11a and 11b.

The mast guide devices 7 and 8 surround the middle part of the mast 3 so as to be able to move up and down relative to each other, and are supported by the main pillars P of the steel tower by means of horizontal support lines 9 and 10. Holds up and down freely.

The mast guide devices 7 and 8 have the same structure, and as shown in FIGS. 16.

Four guide rollers 15 protrude inside the annular frame 14 so as to roll vertically on the outer sides of the four main mast pillars 3a, 3b, 3c, and 3d constituting the mast 3. As shown in FIG.

As best shown in FIG. 9, the stopper 16 moves between a restraining position in which it protrudes inwardly of the annular frame 14 and abuts against the outer side of the main mast members 3a, 3b, 3c, 3d, and a released position away from it. It is freely assembled in the annular frame 14 and biased to the restrained position by an internal spring 17 . The stopper 16 fixes the mast guide devices 7 and 8 to the mast 3 at the restrained position and releases the mast guide devices 7 and 8 at the released position, thereby preventing vertical movement of the mast guide devices 7 and 8 relative to the mast 3. allow. The stopper 16 has a pull tab 16a for locking one ends of the horizontal branch lines 9 and 10 on the outside.

The horizontal support lines 9 and 10 are connected to the stopper 16 at one end and locked to the steel tower main pillar material P at the other end. Horizontal branch lines 9, 10 are provided so as to place the stopper 16 in the release position against the biasing force of the spring 17 when it is tightened with a predetermined tension.

10 to 17, the process of raising the derrick device 1 on the steel tower T to a predetermined height will be described.

In FIG. 10, the derrick device 1 is installed on the steel tower T assembled up to the second section S2, and is used for the assembly work of the third section indicated by the phantom line. At its lower end, the mast 3 is supported on the upper end of the first section S1 of the steel tower T by a horizontal branch line 5, and supported by the upper end of the second section S2 by two lifting wires 6 as oblique support lines. Furthermore, it is supported by a horizontal branch line 9 on the upper end of the second joint S2 via an upper mast guide device 7 in the middle.

In FIG. 11, the assembly of the third section of the steel tower T is completed, and in preparation for lifting the derrick device 1, the first lifting wire 6a is unlocked from the steel tower T and the second lifting wire 6a is released. The load of the derrick device 1 is supported only by the lifting wire 6b.

Next, in FIG. 12, while the load of the derrick device 1 is supported by the second lifting wire 6b, the lifting pulleys 11b and 11d are locked to the upper end of the third joint S3 of the steel tower T, and the lifting pulleys 11b and 11d The load of the derrick device 1 is supported by the first lifting wire 6a by hooking the lifting wire 6a around these pulleys 11a and 11c and locking the ends thereof to the upper ends of the third joints S3.

Next, in FIG. 13, while the load of the derrick device 1 is supported only by the first lifting wire 6a, the lifting pulleys 11b and 11d are locked to the upper end of the third joint S3 of the steel tower T, The lifting wire 6b is hung around these pulleys 11b and 11d, and the ends thereof are locked to the upper ends of the third joints S3. Also, the horizontal branch line 10 of the lower mast guide device 8 is tightened and its stopper 16 is removed from the mast 3.

Next, in FIG. 14, the horizontal branch line 5 and lifting wires 6a and 6b are unlocked, the winch W is rewound, the derrick device 1 is lowered by a distance corresponding to the height of the third joint, and then the lower mast guide device 8 is released and loosened (FIG. 15), the stopper 16 is brought into pressure contact with the mast 3, and with the lower mast guide device 8 fixed to the mast 3, the mast is moved to the position shown in FIG. Lift 3. The lower mast guide device 8 rises together with the mast 3.

Next, in FIG. 16, the horizontal branch line 10 of the lower mast guide device 8 is tightened and locked to the steel tower T, while the horizontal branch line 9 of the upper mast guide device 7 is unlocked and loosened, thereby loosening the upper mast. With the guide device 7 fixed to the mast 3, the mast 3 is raised to the position shown in FIG. The upper mast guide device 7 rises with the mast 3 and both the upper mast guide device 7 and the lower mast guide device 8 are placed in the proper upper position so that their horizontal branches 9, 10 and the truss lower end are horizontally aligned. The branch line 5 is tightened and supported on the steel tower T at a required height position, and the lifting wire 6 is locked to the steel tower T to assemble the fourth section.

The operation of raising the mast guide devices 7 and 8 in accordance with the lifting of the mast 3 can be performed by manipulating the horizontal branch lines 9 and 10 on the side of the steel tower T. No need to go to work.

The oblique support line also serves as a lifting wire 6, and two lifting wires 6 are provided, and the other lifting wire 6 is alternately used to support the load of the derrick body 2.例文帳に追加support position can be moved upward.

In another embodiment of the present invention shown in FIG. 18, upper and lower mast guide devices 7 and lower mast guide devices 8 are provided as one set. As a result, the vertical accuracy of the mast 3 can be improved, and the mast can be stably raised and lowered.

1 Derrick device 2 Derrick main body 3 Masts 3a to 3d Main mast pillars 4 Boom 5 Horizontal support line 6 (6a, 6b) diagonal support wire 7 Upper mast guide device 8 Lower mast guide device 9 Horizontal support line 10 Horizontal support line 11 Affiliation Lifting pulley 12 Pedestal 13 Mast pulley 14 Annular frame 15 Guide roller 16 Stopper 16a Pull 17 Spring 18 Rotating pedestal 19 Pull P Steel tower main column material T Steel tower S1 Steel tower first section S2 Steel tower second section S3 Steel tower No. Verse 3

Claims (1)

A truss column-shaped mast that is supported upright at the center of a steel tower that is being assembled and has four main pillars, a boom that is supported on the top of the mast so that it can be raised and lowered , and one end that is wound around a winch on the ground. , a lifting wire whose middle part is hooked to the lifting pulley on the upper part of the steel tower main pillar and whose other end is locked to the lower end of the mast; The supporting position is supported by the main pillars of the steel tower by means of horizontal support lines, enclosing the middle part of the mast that can move up and down, and holding the mast so that it can move vertically relative to the steel tower . and a mast guide device,
The mast guide device includes an annular frame that encloses the mast so that it can move up and down, guide rollers that are provided on the annular frame and guide the mast to move up and down, and a guide roller that is provided on the annular frame and engages the mast. Equipped with a detachable stopper,
The four guide rollers are provided so as to roll in the vertical direction on the outer sides of the four main mast pillar members that protrude inside the annular frame and constitute the mast,
The stopper is movable between a restrained position in contact with the outer side of the mast main post and a released position away from the mast main post, and is biased to the restrained position by a spring to hold the annular frame in the restrained position. fixed to the mast and incorporated into the annular frame in a released position to allow vertical movement of the annular frame relative to the mast ;
One end of the horizontal support line is connected to the stopper, and when the other end of the horizontal support line is engaged with the steel tower main pillar with a predetermined tension, the stopper is placed at the release position against the biasing force of the spring. is provided to
A method for moving the support position of the mast guide device to the steel tower to an upper position in accordance with the lifting of the mast when the mast is sequentially lifted upward according to the progress of the assembly work of the steel tower,
Prior to raising the mast in its original position supported by the mast guide device supported via the horizontal branch line from its original position on the steel tower to a predetermined upper position, the mast is placed on the steel tower. a first step of lowering to a lower position a predetermined distance below the original position;
After the first step, by removing the support of the horizontal support line from the steel tower main pillar and arranging the stopper of the mast guide device in the restrained position, the mast guide device in the original position is moved to the lowered position. a second step of securing to the mast in
After the second step, moving the mast guide device from the original position to the upper position by lifting the mast from the lowered position to the original position with the fixed mast guide device. process and
After the third step, the horizontal support line of the mast guide device located in the upper position is tightened and supported on the steel tower main pillar, and the stopper of the mast guide device is placed at the release position, whereby the and a fourth step of freeing the mast guide device relative to the mast.

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