JPH04155011A - Withdrawal method for caisson excavator - Google Patents

Abstract

PURPOSE:To withdraw a caisson excavator safely and quickly by moving it to the position of a detaching rail, making it to vertical condition, and lifting it together with the detaching rail up to the position under atmospheric pressure with a lifting device. CONSTITUTION:A caisson excavator 1 which is run movably along rails 5, 5', 5' provided on the ceiling of a working room A, is moved to the position of the detachable detaching rail 5. Nextly, the boom of the excavator 1 is made to vertical condition against the ground surface. Nextly, the excavator 1 together with the detaching rail 5 is simultaneously lifted with a lifting device 6, and withdrawn to the position under atmospheric pressure through a withdrawal lock 13. Hereby, without letting an operator in the working room A, the excavator 1 can be quickly withdrawn.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for recovering a caisson excavator.

(Prior technology) Conventionally, the operation of the excavator in the pneumatic work chamber of the pneumatic 7-scale caisson was carried out by a worker riding on board, but in recent years, with the construction of deep caissons, there have been examples of excavation construction using remote control. are now seen in large numbers.

That is, for example, unmanned excavation in a pressurized air workroom is performed by installing a running rail on the ceiling of the workroom, attaching an excavator to the running rail, and operating the excavator by remote control from the ground.

(Problem B that the invention seeks to solve) However, according to the conventional example described above, workers had to enter the work room to recover the excavator after the completion of excavation work and dismantle and lift the machine. . In this case, since the work is carried out under high pressure, there are problems in that work efficiency is reduced and the worker is also physically and mentally distressed.

This invention was made to solve such a problem, and its purpose is to quickly recover the excavator to atmospheric pressure for inspection, repair, etc. without the need for workers to enter the pressurized work chamber. An object of the present invention is to provide a method for recovering a caisson excavator.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the method of the present invention allows a caisson excavator to run movably along a rail installed on the ceiling of a working room to be connected to a separating rail that can be moved toward and away from the caisson excavator. position so that the excavator boom is approximately perpendicular to the ground, and then
The separating rail and excavator are simultaneously pulled up by a lifting device and recovered to atmospheric pressure through a recovery lock.

(Function) With the above configuration, in the method of the present invention, the caisson excavator that has completed excavation work in the pressurized work chamber is moved to the vicinity of the detachable rail and stopped, and then the boom hoisting cylinder of the excavator is extended. the boom of the excavator so that it is approximately perpendicular to the ground.

Next, both ends of the separating rail are released, and a hook or the like is hooked onto the rail lifting section by a lifting device, and the separated rail and the caisson excavator fixed thereto are simultaneously pulled up.

As described above, the excavator is pulled up through the recovery lock, and the excavator can be quickly recovered to atmospheric pressure without the operator entering the work chamber.

(Example) Hereinafter, preferred examples of the present invention will be described based on the drawings.

FIG. 1 shows the overall structure of a pneumatic caisson according to the present invention.

Here, the characteristic feature of the method of the present invention is that the caisson excavator, which is movably traveling along the rail installed on the ceiling of the work room, is moved to the position of the separating rail, which can freely approach and separate,
The boom of the excavator is made substantially perpendicular to the ground, and then the separating rail and the excavator are simultaneously pulled up by a lifting device and recovered to atmospheric pressure through a recovery lock.

That is, in this embodiment, as shown in FIG. An excavator l is installed so that it can move freely. This excavator 1 is provided with a boom hoisting cylinder 2 for hoisting the boom 3, and for example, a multistage cylinder, a link, an auxiliary cylinder, etc. are used.

Moreover, the lifting bag W6 includes a rail lifting part 18 and a reel 16, and the rail lifting part 18 is provided with a hanging part 17 to which the lifting hook 10 can be hung. A remote robot hand 11 that hooks the hook 10 on the hook 17 is attached to the opening C of the slab B, and the television camera 1
It is remotely controlled based on the image information displayed on 2.

Further, inside the recovery lock 13, there are provided the television camera 12, the lower hatch 14, the upper haunch 15, and the reel 16 for winding up the power line and the like.

FIGS. 2(a) and 2(b) show an embodiment of the lifting device. That is, Figure (a) shows the state in which the separation rail 5 is connected to the fixed rail 5', and Figure (b) shows the state in which the separation rail 5 is separated from the fixed rail 5' and lifted upward. show.

A cylinder 7 for operating a rail connecting bin 8 is attached to the fixed rail 5' side, and a separating rail 5 and a pin insertion hole 9 are provided in the rail lifting section 18.

FIG. 3 shows the state of the excavator when it is being pulled up, and the boom 3 in the working state can be lowered by the boom hoisting cylinder 2 to the position indicated by the two-dot chain line.

Figures 4(a) and 4(b) show an example of using a multi-stage cylinder as the luffing cylinder 2 to make the boom approximately perpendicular to the ground. It is in a state where work can be performed. Hydraulic oil flows into rod a and cylinder b through port C, cylinder b serves as a rod for cylinder d, and hydraulic oil flows from boat e. Further, FIG. 4(b) is a diagram showing the state of the multistage cylinder when the boom of the excavator is made substantially vertical,
At this time, the cylinder is in its most extended state.

In addition, FIGS. 5(a) and 5(b) show the boom hoisting cylinder 2.
This is an example of using a special hydraulic cylinder.
In this example, a magnet 19 is provided at an appropriate location on the cylinder rod, and a sensor 20 is provided on the cylinder side. When the boom is made substantially vertical, the cylinder rod is extended by turning on or turning off the sensor 20.

Furthermore, FIG. 6 (aHb) shows two hydraulic cylinders 2a,
This shows an example in which cylinder rods 2b are connected in series, and according to this embodiment, the amount of expansion and contraction of the cylinder rod can be significantly increased compared to the case where only one cylinder rod is used.

Next, the excavator recovery method according to this embodiment will be specifically explained.

The excavator 1 travels along a rail 5.5'' arranged on the ceiling of the slab B, and is stopped and fixed at an opening C of the slab B. In Fig. 3, the boom hoisting cylinder 2 is shown in Fig. 4 (b).
) and lower the boom 3 to the position indicated by the two-dot chain line so that it is approximately perpendicular to the ground.

Next, pass the lifting hook 10 through the collection lock 13,
Using the robot 11, hook part 1 of the rail pulling part I8
Hook it on 7. Furthermore, by operating the cylinder 7 attached to the fixed rail 5' and pulling out the rail connecting pin 8 from the pin insertion hole 9, the rail lifting portion 18 and the separating rail 5 become free. In this state, the power line is wound up by the power line winding glue 16 while winding up the wire of the lifting hook 10, and the excavator is pulled up together with this.

(Effects of the Invention) As explained above, the present invention provides a caisson excavator that moves freely along the rails installed on the ceiling of the working room.
The excavator is moved to the position of the detachment rail, which can be freely approached and detached, and the boom of the excavator is made approximately perpendicular to the ground.Then, the detachment rail and the excavator are simultaneously pulled up by the lifting device, and recovered to atmospheric pressure through the recovery lock. By doing so, it is possible to raise the excavator's boom upward while it is lowered almost perpendicular to the ground, which not only makes it easier to inspect and maintain the excavator under atmospheric pressure, but also makes it easier to inspect and maintain the excavator under atmospheric pressure. There are also advantages such as being able to raise both at the same time.

Further, when recovering the excavator, there is no fear that the worker will suffer from decompression sickness or the like.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the overall structure of a pneumatic caisson in which the method of the present invention is used, and FIGS. Figure 2 shows the disconnection rail and fixed rail connected.
Figure (b) shows the state in which the release rail is lifted upwards, Figure 3 shows the state in which the excavator is being lifted up, and Figures 4 to 6 show an example of the boom hoisting cylinder. , FIGS. 4-6(a) are views showing the rod in a contracted state, and FIGS. 4-6(b) are views showing the rod in an extended state, respectively. A...Working room 1...Drilling for pneumatic caisson 5...Rail for separation 5'...Fixed rail 6...Lifting device 7...Cylinder 8...Rail connection pin) 9.・Pin insertion hole 16・・・Reel 18・・Rail pulling part (1 other person y゛F2F!1 (a) (b) 5゛5゛Fig. 5Fig. 6

Claims (1)

[Claims] The caisson excavator, which is movable along the rail installed on the ceiling of the work room, is moved to the position of the detachable rail, which can be moved toward and away from the workroom, and the boom of the excavator is made almost perpendicular to the ground. A method for recovering a caisson excavator, characterized in that the separating rail and the excavator are simultaneously pulled up and recovered to atmospheric pressure through a recovery lock.