JPH08245171A - Cable crane - Google Patents

Abstract

PURPOSE: To run each main rope supporting trolley in a state of having stopped the position of a traverse trolley, without performing any special control. CONSTITUTION: With movements of two main rope supporting trolleys 4 and 5, two conpensating rope moving sheaves 92 and 96 are moved as far as a half distance in the same direction via two position compensating ropes 93 and 97, and two traverse rope moving sheaves 90 and 91 being unified with the former are moved as much as the same value as these sheaves 92 and 96, whereby a loosening portion in a traverse rope and a portion spent by each travel of the main rope supporting trolleys 4 and 5 are offset each other, and thus the traverse rope 23 is made so as not to be moved as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable crane used for dam construction and the like.

[0002]

2. Description of the Related Art Conventionally, a cable crane has been known as an effective cargo handling means capable of covering a wide working range.

In general, a cable crane is one in which a main rope is installed between two towers facing each other, and a trolley is transmitted to the main rope to carry out cargo operation. It is often used for concrete placing work in dam construction work. .

For dam construction work, one or both sides of the main rope stretched over both banks of the valley should be used in the flow direction of the river so that cargo can be loaded and unloaded at every corner of the vast dam construction site. It is often the case that a method that allows the user to move to is used. Of these, the one that can move on both sides is called a two-sided traveling type cable crane.

4 to 10 show an example of a double-sided traveling type cable crane. As shown in FIGS. 4 to 6, the left bank A of the valley 1 is shown in FIG.
A pair of runway girders 2 and 3 extending in the required length along the flow direction C of the river are installed at required positions on the right bank B and in parallel with each other at substantially the same height.

And, each of these runway girders 2, 3
Main rope supporting trolleys 4 and 5 are attached respectively so as to be movable along the main rope 6, and a main rope 6 is stretched between the main rope supporting trolleys 4 and 5, and a traverse trolley 7 is attached to the left bank A on the main rope 6. It is suspended and supported so that it can cross the right bank B.

The runway girder 2 on the left bank A is supported at its upstream end in the flow direction C of the river by a foundation 9 provided with a second machine room 8 and at its downstream end at the Yatari traverse tower. It is supported by a foundation 11 with 10 and main ropes 6
The horizontal force due to the tension can be supported by the foundations 12 and 13 provided on the respective mountain sides.

Similarly, the runway girder 3 on the right bank B
The upstream end in the flow direction C of the river is supported by a foundation 15 provided with a third machine room 14, and the downstream end is supported by a foundation 17 provided with a Yatari traverse rope tower 16. The horizontal force due to the tension of the main rope 6 can be supported by the foundations 18 and 19 provided on the respective mountain sides.

Further, the main rope support trolley 4 on the left bank A side is engaged with the runway girder 2 via traveling wheels not shown, and a winch operation of a traveling drive device 20 arranged in the second machine room 8 is performed. Thus, the runway girder 2 can travel in the longitudinal direction via the traveling rope 21.

Similarly, the main rope support trolley 5 on the right bank B side is
It is engaged with the runway girder 3 via traveling wheels (not shown), and travels in the longitudinal direction of the runway girder 3 via the traveling rope 21 by the winch operation of the traveling drive device 20 arranged in the third machine room 14. I'm supposed to get it.

Furthermore, the runway girder 2 on the left bank A
A first machine room 22 is provided at a position lower than the erection position of the machine, and inside the first machine room 22, a traverse device 24 for traversing the traverse trolley 7 via traverse ropes 23 and the traverse trolley 7 are provided. However, there is provided a hoisting device 28 that hoists and lowers a concrete bucket 26 that is suspended and supported by a bucket hanger 25, by a hoisting rope 27.

Next, how to hang the traveling rope 21 for traveling the main rope supporting trolleys 4 and 5 will be described below with reference to FIG.

First, a sheave 3 having a traveling rope 21 fixed at one end to upstream foundations 9 and 15 using traveling rope end metal fittings 29 is provided on the upstream side portions of the main rope supporting trolleys 4 and 5.
After being guided to the drum 32 of the traveling drive device 20 on the upstream side via 0, 31 and wound, it is guided to the downstream side and hung on a sheave 33 provided on the upper part of the downstream side foundation 11, 17, and further, The running rope end metal fitting 36 is used to fasten the foundations 11, 43 on the downstream side via sheaves 34, 35 provided on the downstream side of the main rope supporting trolley 5.

Next, how to hang the traverse rope 23 for traversing the traverse trolley 7 will be described below with reference to FIG.

First, the traverse rope 23, one end of which is secured to the end portion 38 on the left bank A side of the traverse trolley 7 using the traverse rope end metal 37, is provided with a sheave 39 provided below the main rope supporting trolley 4 on the left bank A. , 40 to the foundation 9 on the upstream side, where it is located between the pair of sheaves 41 and 42, and the weight sheave 4 for suspending the take-up weight 43 for traverse rope.
Hand over to 4.

The traverse rope 23 suspended on these is guided to the first machine room 22 below through the sheaves 45 and 46 provided on the foundation 11 on the downstream side to the drum 47 of the traverse device 24.
After being wound on the sheave 51, the sheave 51 is hung on the shed 51 provided on the Yatari traverse rope tower 10 erected on the foundation 11.
To the right bank B.

The traverse rope 23 passed to the right bank B is hung on the sheave 52 provided on the valley traverse tower 16 on the right bank B, and the main rope support of the right bank B is supported through the sheave 53 provided on the downstream side foundation 17. Guide to the sheaves 54, 55 provided at the lower part of the trolley 5, and from the sheaves 54, 55, the end 5 on the right bank B side of the traverse trolley 7.
6 and guide the other end of the traverse rope 23 to the traverse rope end hardware 57.
To be tied to.

Next, how to hang up the hoisting rope 27 for raising and lowering the concrete bucket 26 suspended and supported by the traverse trolley 7 will be described below with reference to FIG.

A hoisting device 2 for the first machine room 22 on the left bank A
The hoisting rope 27 wound so as to be able to be wound / unwound around the drum 58 of No. 8 is hung on sheaves 59, 60 provided on the foundation 11 on the downstream side above, and the main sheave 59, 60 of the left bank A Sheaves 61 and 62 provided on the lower portion of the rope supporting trolley 4.
The lower part of the sheave 64 for supporting the bucket hanger 25 for suspending the concrete bucket 26 by hanging the hoisting rope 27 hung on the sheave 63 provided on the left bank A side of the traverse trolley 7 via the The sheave 64 is suspended by passing it to the sheave 6 and the sheave 6 provided on the right bank B side of the traverse trolley 7.
The hoisting rope 27 is fastened to the foundation 15 from the sheave 65 through the sheaves 66 and 67 provided on the lower portion of the main rope supporting trolley 5 on the right bank B to the foundation 15 on the upstream side.

The main rope 6 stretched between the above-mentioned main rope supporting trolleys 4 and 5 is, as shown in FIG. 6, located at the pivotal support portions 68 and 69 of the main rope supporting trolleys 4 and 5, respectively. , The main rope end metal fittings 70 and 71, respectively, and the main rope tension adjusting mechanism 72 is provided between the main shaft support 68 and the main rope end metal fitting 70 in the main rope supporting trolley 4 on the left bank A side. It is provided.

The main rope tension adjusting mechanism 72 is, as shown in FIG. 10, a pivot portion 68 on the left bank A side and a main rope end hardware 70.
And a plurality of sheaves 75, 76, 77, 78 are multiply provided on a pair of connecting metal fittings 73, 74 provided between the connecting metal fittings 73, 74, and one end of the take-up rope 100 is attached to the connecting metal fitting 73 on the pivotal support 68 side and an end metal fitting 79. The take-up rope 100 is fastened with a small sheave 7 between the connecting hardware 73 and 74.
Large sheaves 75,7 after being multiply hung between 7,78
The main rope take-up is wound around the drum 6 of the main rope take-up device 80 provided on the upper portion of the main rope supporting trolley 4 on the left bank A from one of the large sheaves 75, 76 in a multiple manner. The tension of the main rope 6 is adjusted by winding and unwinding the rope 100.

In the figure, 82 to 86 are hangers for supporting the various ropes 23 and 27 on the main rope 6 (of which hanger 82 is a fixed type and hangers 83 to 86 are movable), and 87 is a hanger 83 to. Hanger rope for moving 86, 8
8 is a rope receiving tower, and 89 is an electric cable.

According to the above construction, the traveling drive device 20 is driven to move the main rope supporting trolleys 4 and 5 provided on the left bank A and the right bank B along the runway girders 2 and 3, respectively.
The main ropes 6 suspending the traverse trolleys 7 are moved along the river flow direction C by synchronizing and traveling in the same direction at the same speed.

When the main rope 6 is moved to a predetermined position,
The traverse device 24 provided in the first machine room 22 is driven to circulate the traverse rope 23, and the traverse trolley 7 is moved to the left bank A.
And the right bank B are traversed, and the traverse trolley 7 is stopped above the concrete pouring place.

Next, the hoisting device 28 provided in the first machine room 22 is driven to feed the hoisting rope 27, and the sheave 64 is lowered to lower the concrete bucket 26.
To let the concrete release.

After that, the hoisting rope 27 is wound up, the concrete bucket 26 is pulled up, the main rope supporting trolleys 4 and 5 are made to travel again in synchronization, and the traverse device 24 is operated to operate the traverse trolley 7. To a position above the batcher plant (not shown), the concrete bucket 26 is lowered by the hoisting device 28 to load new concrete, and after that, the concrete bucket 26 is lifted and the above-described operation is repeated, thereby Continue the placement work.

[0027]

However, the above-mentioned cable crane has the following problems.

That is, as shown in FIG. 8, when the main rope supporting trolleys 4 and 5 travel in the flow direction C of the river in synchronism with each other, the main rope supporting trolleys 4 and 5 correspondingly move. The traverse 23 is moved by the amount corresponding to the traveling distance, and the traverse trolley 7
Will move to the left bank A side and the right bank B side.

Therefore, in order to drive the main rope supporting trolleys 4 and 5 while keeping the traverse trolley 7 in the fixed position, the traverse device 24 is controlled so that the traveling operation of the main rope supporting trolleys 4 and 5 is performed. The traverse 23 must be wound and unwound in synchronism with.

However, even with this arrangement, the traverse device 2
Since the response delay is unavoidable in the control of No. 4, the traverse trolley 7 moves in small steps while the main rope supporting trolleys 4 and 5 are traveling, which causes vibration.

In view of the above situation, the present invention has an object to provide a cable crane capable of traveling each main rope support trolley in a state where the position of the traverse trolley is held without any special control. There is.

[0032]

According to the present invention, a pair of main rope support trolleys are provided so as to be movable along a pair of substantially parallel runway girders, and the main ropes stretched between both main rope support trolleys can be moved. Suspend the traverse trolley at one end, one end is fixed to the traverse trolley, one side main rope support trolley, one end of the runway girder on one side, and the other end, the other end of the runway girder on the other side, and one end, etc. Side traverse support trolley through the sheaves respectively provided, the other end is provided with a traverse rope connected to the traverse trolley, and the sheave that supports the traverse rope on one end side of each runway girder is for traverse rope respectively. As a moving sheave, further, one end is fixed to one end side of each runway girder, a correction rope moving sheave integrated with each of the traverse rope moving sheaves, and one end of each runway girder, and
The present invention relates to a cable crane, which is characterized in that a position correcting rope whose other end is fixed to a main rope supporting trolley is provided through a fixed sheave fixed to each of the other ends in order.

[0033]

[Operation] A pair of main rope support trolleys are synchronously moved along a pair of substantially parallel runway girders, and a traverse trolley is moved along the main ropes stretched between the two main rope support trolleys. Done.

Then, by moving the traverse,
The traverse rope is moved along the main rope support trolley on one side, one end and the other end of the runway girder on one side, the other end of the runway girder on the other side, and one end, and the traverse rope support trolley on the other side. The trolley is designed to be moved along the main rope.

Here, when the main rope supporting trolley moves, the position correcting rope connected to the main rope supporting trolley moves, whereby the moving sheave for correction rope suspended on the position correcting rope moves the main rope supporting trolley. It is moved in the same direction by half the movement amount of.

Then, the traverse rope moving sheave integrated with the correction rope moving sheave is also moved in the same direction by half the movement amount of the main rope supporting trolley, so that the traverse rope is supported by the main rope supporting member before the movement. It will be loosened by the amount of movement of the trolley.

However, since the main rope supporting trolley is moved by a distance equal to the amount of loosening of the traverse rope, the loose rope is offset by the movement of the main rope supporting trolley, and the traverse rope is moved as a whole. It would be the same as it was not.

Therefore, even if the main rope supporting trolley moves, the traverse rope is not moved, and the traverse trolley remains stopped at the same position.

[0039]

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

FIGS. 1 to 3 show an embodiment of the present invention. In the drawings, the parts designated by the same reference numerals as those in FIGS. 4 to 10 represent the same parts.

The traverse rope 23 whose one end is fixed to the end portion 38 on the left bank A side of the traverse trolley 7 using the traverse rope end metal 37.
Through the sheaves 39, 40 provided on the lower part of the main rope support trolley 4 on the left bank A to the foundation 9 on the upstream side, where:
The moving sheave 90 for traverse is suspended.

The traverse rope 23 suspended on the traverse rope moving sheave 90 is attached to the sheaves 45, 4 provided on the downstream side foundation 11.
After being guided to the first machine room 22 located below via the 6 and wound around the drum 47 of the traverse device 24, it is hung on the sheave 51 provided on the Yatari traverse rope tower 10 erected on the foundation 11. , And deliver it from the sheave 51 to the right bank B.

The traverse rope 23 passed to the right bank B is hung on the sheave 52 provided on the valley traverse tower 16 on the right bank B, and through the sheave 53 provided on the foundation 17 on the downstream side, the foundation 15 on the upstream side. Hang it over the traverse rope moving sheave 91 located at
From the traverse rope moving sheave 91, through the sheave 50 provided on the downstream side foundation, to the sheaves 54, 55 provided under the main rope supporting trolley 5 on the right bank B, and from the sheaves 54, 55 to the right bank of the traverse trolley 7. Lead to the end 56 on the B side, and traverse 23
The other end of the wire is fastened to the traverse end end hardware 57.

Then, the moving sheave 9 for traverse rope on the left bank A side
0, the correction rope moving sheave 92 is attached integrally, and after fixing one end of the position correction rope 93 to the upstream side foundation 9, the correction rope moving sheave 92 and the fixing fixed to the upstream side foundation 9 are fixed. After hanging around the sheave 94 and guiding the position correcting rope 93 to the downstream side foundation 11 and hanging around the fixed sheave 95 fixed to the downstream side foundation 11, the other end of the position correcting rope 93 is connected to the main bank of the left bank A. Secure with the rope support trolley 4.

Similarly, a moving sheave 91 for traverse rope on the right bank B
The movable sheave 96 for correction line is attached integrally with the fixed line, and after fixing one end of the position correction line 97 to the foundation 15 on the upstream side, the movable sheave 96 for correction line and the fixed sheave fixed to the foundation 15 on the upstream side. 98, the position correction rope 97 is guided to the downstream side foundation 17 and is hooked on the fixed sheave 99 fixed to the downstream side foundation 17, and then the other end of the position correction rope 97 is connected to the right bank B.
Secure it to the main rope support trolley 5.

Next, the operation will be described.

Regarding the operation of the cable crane itself,
The description is omitted because it is almost the same as in FIGS.

In the present invention, the main rope support trolley 4 on the left bank A and the main rope support trolley 5 on the right bank B move from the position shown by the solid line in FIG. 2 to the position shown by the virtual line by the distance x to the right side in FIG. In this case, the position correction ropes 93, 97 move as a whole toward the upstream side (left side in FIG. 2) by the distance x, and the correction rope moving sheaves 92, 96 move to the right side in FIG. It will move by / 2x.

Then, the traverse rope moving sheaves 90 and 91, which are integrated with the correction rope moving sheaves 92 and 96, also move to the right side in FIG. 2 by a distance of 1 / 2x, so that the traverse rope moving sheave 90 compared to the state before the movement. , 91, which is twice as long as the movement distance of the traverse rope 23.

However, the main rope support trolleys 4 and 5 have a distance x
Since it has moved to the right only, the amount of slack of the traverse rope 23 remains as it is as the expansion of the distance between the traverse rope moving sheaves 90, 91 and the sheaves 40, 54 attached to the main rope support trolleys 4, 5. Will be offset.

Therefore, the length between points D and E in FIG.
Since the length is equal to the length between points D and E and is always constant, the traverse rope 23 does not move as a whole even if the main rope supporting trolleys 4 and 5 move. Therefore, no control is performed. The main rope supporting trolleys 4 and 5 can be made to travel with the traverse trolley 7 kept stationary.

Further, by using the position correcting ropes 93, 97 and the traverse rope moving sheaves 90, 91, 92, 96, etc., it is possible to eliminate the response delay and the like seen in the control. It can also prevent swaying.

The cable crane of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0054]

As described above, the cable crane of the present invention is excellent in that each main rope support trolley can be run with the traverse trolley in the fixed position without any special control. It can be effective.

[Brief description of drawings]

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

FIG. 2 is a principle view of the present invention.

FIG. 3 is a principle diagram following FIG. 2;

FIG. 4 is an overall perspective view of a cable crane.

5 is a device configuration diagram of FIG. 4. FIG.

FIG. 6 is a schematic view showing how to hang the rope of FIG.

FIG. 7 is a schematic view showing how to hang a traveling rope.

FIG. 8 is a schematic diagram showing how to hang a traverse rope.

FIG. 9 is a schematic diagram showing how to wind the hoisting rope.

FIG. 10 is a perspective view showing a main rope tension adjusting mechanism.

[Explanation of symbols]

 2,3 Runway girder 4,5 Main rope support trolley 6 Main rope 7 Traverse trolley 23 Traverse rope 40,45,51,52,53,54 Sheave 90,91 Traverse rope movement sheave 92,96 Correction rope movement sheave 93 , 97 Position correction cable 94, 95, 98, 99 Fixed sheave

Claims (1)

[Claims] 1. A pair of main rope supporting trolleys are provided so as to be movable along a pair of substantially parallel runway girders, and a traverse trolley is suspended so as to be movable on the main ropes stretched between the main rope supporting trolleys. One end fixed to the traverse trolley, one side main rope support trolley, one side runway girder one end, and the other end,
The other end of the runway girder on the other side, and one end, through the sheaves provided on the main rope support trolley on the other side in order, the other end is provided with a traverse rope connected to the traverse trolley, and each traverse rope is provided. Each of the sheaves supported on one end side of the runway girder is a moving sheave for traverse rope, and further, one end is fixed to one end side of each runway girder, a moving sheave for correction rope integrated with each of the traverse rope movement sheaves, and, A cable crane, characterized in that a position-correcting rope whose other end is fixed to a main rope supporting trolley is provided in order through fixed sheaves fixed to one end and the other end of each runway girder.