JPS6233379B2 - - Google Patents

Description

[Detailed Description of the Invention] In recent years, the demand for electricity in urban areas has continued to increase, and power generation and transmission plans are being advanced in various places.Transmission towers are becoming larger year by year, and due to environmental issues, power transmission routes are becoming more and more remote. Increasingly, they are being forced to move to mountainous areas far away from the country. As a result, as the scale of construction of steel towers increases, construction conditions and working conditions deteriorate.In addition, workers' work consciousness has recently changed and there is a tendency to avoid heavy physical labor, leading to improvements in working conditions and safety. In order to ensure safety, mechanization of steel tower construction is urgently needed.

The present invention relates to a climbing crane that allows steel tower assembly to be carried out easily and efficiently.

Traditionally, the typical scaffolds for assembling power transmission towers have been so-called "suspended scaffolds" that use footboards made of wood or aluminum, and "cage-shaped scaffolds" that integrate handrails and scaffolding. Ta.

``Suspended scaffolding'' uses human power to span the footboards to the necessary locations as the tower is being assembled, and has the advantage of being simple, inexpensive, and has a wide range of applications. However, on the other hand, it takes considerable effort and time to install and remove the scaffolding,
In addition, they had the disadvantage that they required a high level of skill. In addition, it was structurally difficult to equip the scaffolding with handrails, etc., and there was also a problem with safety during tower assembly work.

"Cage-shaped scaffolding" was devised to improve safety, which is the disadvantage mentioned above, but because the handrail and scaffolding are integrated, it tends to be heavy.
Lifting equipment and skilled personnel are required to rearrange the scaffolding and secure it to the steel tower, and it is also necessary to attach metal fittings for installing the scaffolding to the tower body.
The effort and expense required for this was large. In addition, this "cage-shaped scaffold" is normally installed in a free-standing manner at necessary locations on the steel tower, but in that case, considerable ingenuity is required to ensure the safety of the means of transportation to reach the scaffold. There were problems such as.

Other methods for assembling small-scale steel towers include "pipe scaffolding," in which appropriate pipes are assembled using clamp hardware, etc., and scaffolding boards are hung over them, or torii-shaped assembled scaffolding is erected from the ground. It is not common to use it for assembling steel towers with a height exceeding

The present invention mechanizes steel tower assembly by using a climbing crane, and provides a scaffold for steel tower assembly that eliminates the need for scaffold installation and removal work, thereby saving labor in scaffold assembly work, improving work efficiency, and improving safety. A cylindrical frame is fitted onto the crane mast of a climbing crane so that it can be raised and lowered, and a fixing pin that can be inserted between the crane mast and the frame is installed, and the frame is equipped with a fixed pin that can be inserted between the crane mast and the frame. A possible pass-through hole is drilled, and a pivot bracket is provided at the upper and lower positions of the pass-through hole in the frame via a vertical pivot pin, and a telescoping ladder is pivotally connected to the lower pivot bracket in a freely undulating manner. A lifting jack which is pivoted to an upper swing bracket so as to be able to raise and lower is connected to the ladder, a work cage is provided at the tip of the ladder so as to be tiltable, and the work cage is moved between the ladder and the work cage in conjunction with the raising and lowering movement of the ladder. The cage is characterized by the provision of cage adjustment jacks for holding the cage horizontally.

Embodiments of the present invention will be described below based on the drawings.

A climbing crane supported by a crane mount 2 installed in the center of a steel tower 1 and a lifting guide frame 3 erected on the mount 2, and configured so that mast constituent members can be added and removed at the lower part. Hoisting the load to the top of the mast 4 of 37,
A revolving body 5 having lifting functions such as retracting and turning is provided, and a scaffolding device 6 is positioned below the revolving body 5 and fitted to the mast 4. The scaffolding device 6 is movably fitted to the mast 4 and can be locked to and released from the mast 4. Further, the scaffolding device has a work cage 7 provided via a ladder, the ladder can be turned and raised and lowered, and the work cage 7 is tiltably supported at the tip of the ladder.

Next, details of the scaffolding device 6 will be explained with reference to FIG.

The outside of the cylindrical mast 4 is moved up and down via guide rollers 11 to a cylindrical mast 4, which has a ladder 8 for raising and lowering workers, a passage hole 9 at an appropriate location, and a landing 10 below the hole 9. possible frame 1
Insert 2. The frame 12 is provided with a pass-through hole 13 that matches the pass-through hole 9 of the mast 4, and a fixing pin 14 that locks the frame 12 to the mast 4 at a position where the pass-through hole 9 and the pass-through hole 13 match. The fixing pins 14 are provided on the frame 12 via bosses 15 so as to be able to move in and out toward the center of the mast 4, and engage with cross beams 16 or pin holes (not shown) provided on the mast 4 at predetermined intervals.
Further, a landing 17 for attaching and detaching the fixing pin 14 is attached to the outer periphery of the frame 12 near the fixing pin 14. Brackets 18 are provided on the outer surface of the frame 12 at positions above and below the passage hole 13,
The pivot brackets 22 and 23 are attached to pivot pins 20 and 21 provided perpendicularly to the brackets 18 and 19, respectively. The pivot bracket 23 and the pivot pin 21 are keyed together. The swing bracket 23 and the base ladder 25 having handrails 24 on both sides are pivotally connected at the lower end of the base ladder 25, and the upper end of the base ladder 25 and the base ladder 25 are connected together.
2 means a bifurcated connecting beam 26 and an undulating jack 27
Connect via. A guide rail 31 is attached to the tip ladder 29 provided with handrails on both sides, and a roller 30 rotatably attached to the base ladder 29 is fitted to the guide rail 31, so that the tip ladder 29 expands and contracts with respect to the base ladder 25. be able to move freely in any direction. Root ladder 25
Install the telescopic jack 32 between the and the tip ladder 29,
The tip ladder 29 is configured to expand and contract by driving the telescopic jack 32. Further, a working cage 7 surrounded by a handrail 33 is arranged above the tip ladder 29, and one end of the working cage 7 is pivotally attached to the upper end of the tip ladder 29, and the other end of the working cage 7 and the tip are connected to each other. The ladder 29 is connected to the middle part by a cage adjustment jack 35, and can be tilted by driving the cage adjustment jack 35. A swing drive device 36 connected to the above-mentioned swing pin 21 is fixed to the bracket 19, and by driving the drive device 36, the work cage 7 and both ladders 25, 29 are moved.
can be rotated together. Another set of the above-mentioned working cage 7 and its supporting and driving device are mounted symmetrically on the frame 12.

Next, the operation will be explained.

First, the fixing pins 14 are engaged with the crossbeams 16 at appropriate locations to lock the scaffolding device 6 at a desired position on the mast 4. This work is performed by a worker on the landing 17. The landing 17 is also used when inspecting each device.

Next, the work cage 7 is moved to the work position on the steel tower 1. Although this operation can be performed remotely from the ground or the like by pressing a button, the following describes the case where a worker rides on the work cage 7 and performs the operation. In order to reach the work cage 7, a worker can ascend a ladder 8 for elevating workers, go through a landing 10, passage holes 9 and 13, and ascend ladders 25 and 29. With a worker mounted on the work cage 7, the swing drive device 36 rotates the work cage 7, and the hoisting jack 27 moves the ladders 25, 29 up and down.
The tip ladder 29 is extended and contracted using the ladder extension jack 32, and the work cage 7 is adjusted using the cage adjustment jack 35.
The work cage 7 is moved to a predetermined position. The movement range of the working cage 7 extends over the entire circumference of the steel tower 1, as shown in FIG. When the movement of the work cage 7 is completed, the position is changed to the swing drive device 36, the hoisting jack 27, and the ladder telescopic jack 3.
2. Hold by locking the cage adjustment jacks 35 respectively. The positioned work cage 7 may come into contact with the steel tower 1, but it is not necessary to be fixed to the steel tower 1. After or in parallel with the positioning of the working cage 7, the steel tower member 38 is transported to the working position by the crane 37, and the steel tower 1 is assembled (see FIG. 2). As mentioned above, the work cage 7 can be moved around the entire circumference of the steel tower, and if the ladders 25 and 29 are also undulated by the undulation jack 27, the work cage 7 can be moved to a position where the installation work of the diagonal members 39 and other components of the steel tower can be carried out. The work cage 7 can be moved. If tools, devices, etc. necessary for the assembly work are arranged in advance in the work cage 7, the labor of the assembly work can be saved.

Furthermore, since the crane 35 equipped with the present scaffolding device 6 is of a climbing type, the mast 4 and the revolving structure 5 can be effectively raised and lowered according to the progress of the assembly of the steel tower 1. Furthermore, the scaffolding device 6 has a structure that can be attached to an appropriate position on the mast 4, and as the mast 4 goes up and down, the scaffolding device 6 also goes up and down. Therefore, depending on the progress of the tower assembly, it can be raised and lowered with a crane as shown in Figure 3, and placed in the required position for use.

In the above embodiment, the frame 12 is fixed at an appropriate position on the mast 4, and as the mast 4 moves up and down,
Although the scaffolding device 6 is configured to be able to move up and down automatically, as another application example, another lifting means may be combined with the frame 12, and the scaffolding device 6 may be able to move up and down independently using the erected mast 4 as a guide. Also good. Moreover, the same effect can be achieved even if the ladder configuration is not a two-tiered structure such as the base ladder 25 and tip ladder 29, but has three or four tiers, and even if the linear extension method is replaced by a bending extension method. Needless to say.

As described above, the present invention has the following advantages: (i) Since the climbing crane of the present invention is equipped with a scaffolding device, there is no need to install or remove the scaffolding required for crane work, improving safety and saving labor. is measured.

(ii) By installing the scaffolding device on the crane, there is no need to install metal fittings for attaching the scaffolding to the tower body.

(iii) By adopting a two-tier ladder system for the scaffolding device to make it expandable and retractable, and also capable of turning and tilting the cage, the device can be made more compact, and at the same time it can be applied to assembling various types of steel towers, making it more economical. It has improved functionality and versatility.

(iv) Since the scaffolding device is integrated with the crane, it is easy to attach fastening devices such as steel tower assembly bolts to the work cage, which saves labor and reduces heavy muscular labor.

(v) Ensure the safety of the means of transportation leading to the work cage of the scaffolding equipment, provide safety handrails on the work cage, and use remote control operations such as push buttons to operate the equipment. Even experienced workers can easily engage in the assembly work of the steel tower. Furthermore, it is possible to prevent accidents that occur during assembly, which were common in the past.

(vi) Since the climbing crane according to the present invention is not limited by the shape of the steel tower, it can be applied to assembling various types of steel towers, making it possible to standardize the assembly work and make it possible to install the work cage in the required location. Mechanization saves labor and enables installation in a short time, significantly shortening the tower assembly period.

It can exhibit excellent effects such as

[Brief explanation of the drawing]

Figures 1 to 3 are side views showing the steel tower under construction, the overall arrangement of the climbing crane of the present invention, and Figure 4.
5 is a side sectional view showing details of the scaffolding device, and FIG. 6 is a sectional view taken along line AA in FIG. 5. 1 is a steel tower, 4 is a mast, 5 is a revolving structure, 6 is a scaffolding device, 7 is a work cage, 14 is a fixing pin, 2
5 and 29 are ladders, 27 is a lifting jack, 32 is a telescopic jack, 35 is a cage adjustment jack, and 37 is a crane.

Claims (1)

[Claims] 1 A cylindrical frame is fitted to the crane mast of a climbing crane so that it can be raised and lowered, and a fixing pin that can be inserted across the crane mast and the frame is provided, and the frame has a pass-through hole that allows transfer from the crane mast. A swing bracket is installed through a vertical swing pin at the upper and lower positions of the pass-through hole in the frame, and an extendable ladder is pivotally attached to the lower swing bracket so as to be able to rise and fall freely, and to the upper swing bracket. A hoisting jack which is pivoted so as to be able to rise and fall is connected to the ladder, a work cage is provided at the tip of the ladder so as to be tiltable, and the cage is held between the ladder and the work cage in conjunction with the hoisting movement of the ladder to hold the work cage horizontally. A climbing crane characterized by being equipped with an adjustment jack.