JPH0649986B2 - How to recover a caisson excavator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for recovering a caisson excavator.

(Prior Art) Conventionally, the operation of the excavator in the pneumatic work chamber of the pneumatic caisson has been performed by an operator boarding and operating, but in recent years an example of excavation work by remote control along with large-depth caisson work Has come to be seen many.

That is, for example, a traveling rail is provided on the ceiling of the work room, the excavator is mounted on the traveling rail, and the excavator is operated by remote control from the ground, and unmanned excavation is performed in the pneumatic working room. .

(Problems to be Solved by the Invention) However, according to the above-described conventional example, the worker had to enter the work chamber to recover the excavator after the excavation work was completed, and disassemble and pull up the machine. In this case, since the work is performed under a high pressure, there is a problem that the work efficiency is lowered and the worker is physically and mentally distressed.

The present invention has been made to solve such a problem, and an object thereof is to promptly recover an excavator under atmospheric pressure without inspecting a pressure working chamber, and perform inspection, repair, etc. It is to provide a method for recovering a caisson excavator capable of carrying out.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the method of the present invention is a pneumatic system equipped with a caisson excavator 1 which is movable along a rail installed on a slab ceiling B of a work room A. In the caisson, the rail is composed of a fixed rail 5'and a detachable rail 5 installed in the opening C directly below the recovery lock 13 and connected to the fixed rail 5'for connecting and disconnecting the caisson excavator 1. By moving to the position of the separating rail 5, the boom 3 of the caisson excavator 1 is made substantially vertical to the ground, and the separating rail 5 and the caisson excavator 1 are simultaneously pulled up into the recovery lock 13 by the lifting device 6, The lower hatch 14 is closed, the inside of the recovery lock 13 is decompressed, and the upper hatch 15 is opened to recover under atmospheric pressure.

(Operation) With the above-described configuration, in the method of the present invention, the caisson excavator 1 that has completed the excavation work in the working chamber A under the pressure machine is moved to the vicinity of the detachable separation rail 5 and stopped.
Then, the boom hoisting cylinder 2 of the caisson excavator 1 is extended to bring the boom 3 of the caisson excavator 1 into a state substantially vertical to the ground.

Next, the fixing of both ends of the separating rail 5 is released, and the pulling device 6 hooks a hook or the like on the rail pulling up portion to simultaneously pull up the separated separating rail 5 and the caisson excavator 1 fixed thereto.

As described above, the caisson excavator 1 is pulled up through the recovery lock 13 so that the worker does not enter the work chamber,
The caisson excavator 1 can be quickly recovered under atmospheric pressure.

(Examples) Hereinafter, preferred examples of the present invention will be described with reference to the drawings.

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

That is, in this embodiment, as shown in FIGS. 1 and 2, in the working chamber A, the fixed rail 5 ′ installed on the slab ceiling B and the disconnecting rail 5 connected to the fixed rail 5 ′ are rollers. A caisson excavator 1 is installed via 4 so as to run freely. This caisson excavator 1 has a boom 3
A boom hoisting cylinder 2 for hoisting the vehicle is provided, and for example, a multistage cylinder, a link, an auxiliary cylinder, or the like is used.

Further, the lifting device 6 includes a rail pull-up portion 18 and a reel 16, and the rail pull-up portion 18 is provided with a hooking portion 17 capable of hooking the lifting hook 10. The remote robot hand 11 that hooks the hook 10 on the hook 17 is attached to the opening C of the slab ceiling B, and is remotely controlled based on the image information displayed on the television camera 12. Further, inside the recovery lock 13, the television camera 12, the lower hatch 14, the upper hatch 15, and the reel 16 for winding the power line and the like are provided.

2 (a) and 2 (b) show an example of the construction of the lifting device 6.
That is, (a) in the figure shows a state in which the separating rail 5 is connected to the fixed rail 5 ', and (b) in the same figure shows a state in which the separating rail 5 is separated from the fixed rail 5'and lifted up. Show.

A cylinder 7 for actuating the rail connecting pin 8 is provided on the side of the fixed rail 5 ', and a rail 5 for separating and a pin insertion hole 9 are provided in the rail pull-up portion 18.

FIG. 3 shows a state when the caisson excavator 1 is pulled up, and the boom 3 in the working state can be lowered to the position indicated by the chain double-dashed line by the boom hoisting cylinder 2.

FIGS. 4 (a) and 4 (b) show an example in which a multi-stage cylinder is used as the hoisting cylinder 2 for making the boom 3 substantially vertical to the ground. FIG. 4 (a) shows the caisson excavator 1 It is in a state where normal excavation work is performed. The hydraulic oil flows through the port c to the rod a and the cylinder b, and the cylinder b is connected to the cylinder d.
On the other hand, it plays the role of a rod and hydraulic fluid flows from the port e. Further, FIG. 4 (b) is a view showing a state of the multistage cylinder when the boom of the caisson excavator 1 is made substantially vertical, and at this time, the cylinder is in the most extended state.

5 (a) and 5 (b) show an example in which a special hydraulic cylinder is used as the boom hoisting cylinder 2. In this example, a magnet 19 is provided at an appropriate position on the cylinder rod, and a sensor 20 is provided on the cylinder side. Is provided. And when making the boom almost vertical, turn on the sensor 20 electricity,
Alternatively, the cylinder rod is extended by cutting.

Further, FIGS. 6 (a) and 6 (b) show two hydraulic cylinders 2a and 2b.
This is an example in which the cylinder rods are connected in series. According to this embodiment, the amount of expansion and contraction of the cylinder rod can be greatly increased compared with the case of one cylinder rod.

Next, the method for recovering the caisson excavator 1 according to this embodiment will be specifically described.

The caisson excavator 1 has rails 5 arranged on the slab ceiling B 5,
It runs along 5'and is stopped and fixed at the opening C of the slab ceiling B. In FIG. 3, the boom hoisting cylinder 2 is extended as shown in FIG. 4 (b), and the boom 3 is lowered to the position indicated by the chain double-dashed line so that the boom 3 is substantially vertical to the ground.

Then, pass the lifting hook 10 through the recovery lock 13,
Using the robot 11, the hooking portion 1 of the rail pulling portion 18
Hook at 7. Further, 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 pull-up portion 18 and the disconnecting rail 5 become free. In this state, while winding the wire of the hoisting hook 10, the power line is wound by the reel 16 for winding the power line, and the caisson excavator 1 is pulled up with this.

Then, when the caisson excavator 1 is pulled up to the inside of the recovery lock 13, the lower hatch 14 is closed to shut off the space between the work chamber A and the recovery lock 13, and then the compressed air in the recovery lock 13 is valved by a known method ( The pressure is discharged and decompressed by an operation (not particularly shown). At the same pressure as the atmosphere above the upper hatch 15, that is, when the pressure inside the recovery lock 13 becomes atmospheric pressure, the upper hatch 1
5 is opened and the excavator 1 is pulled up from the recovery lock 13 to the atmospheric pressure.

(Effects of the Invention) As described above, the present invention provides a pneumatic caisson equipped with a caisson excavator 1 that travels freely along a rail installed on a slab ceiling B of a work room A,
The rail is composed of a fixed rail 5'and a detachable rail 5 which is installed in the opening C directly below the recovery lock 13 and which is attached to and detachable from the fixed rail 5 '. The caisson excavator 1 is detached from the rail. 5, the boom 3 of the caisson excavator 1 is made substantially perpendicular to the ground, and the separating rail 5 and the caisson excavator 1 are simultaneously pulled up into the recovery lock 13 by the lifting device 6, and the lower hatch 14 is moved. Closed to decompress the recovery lock 13 and open the upper hatch 15 to recover under atmospheric pressure, so that the boom 3 of the caisson excavator 1 can be pulled upward while being lowered almost vertically to the ground. Since the caisson excavator 1 can be easily inspected and maintained under atmospheric pressure, the power line can be pulled up at the same time.

Further, when the caisson excavator 1 is recovered, there is no possibility that the worker will suffer decompression sickness or the like.

[Brief description of drawings]

FIG. 1 is a diagram showing the entire structure of a pneumatic caisson in which the method of the present invention is used, and FIGS. 2 (a) and 2 (b) are diagrams showing an embodiment of a pulling device, and FIG. Shows a state in which the detaching rail and the fixed rail are connected, FIG. 2 (b) shows a state in which the detaching rail is lifted up, and FIG.
The figure shows the state when the excavator is pulled up, FIGS. 4 to 6
The figure shows an example of a boom hoisting cylinder.
FIG. 4 (a) is a diagram showing a state in which the rod is contracted, and FIGS. 4 to 6 (b) are diagrams showing a state in which the rod is extended. 1 ... Caisson excavator, 5 ... Separation rail,
5 '... fixed rail, 6 ... pulling device, 7 ... cylinder, 8 ... rail connecting pin, 9 ... pin insertion hole, 10
...... Hook, 11 ...... Remote robot hand, 12 ...... TV camera, 13 ...... Recovery lock, 14 …… Lower hatch, 15 …… Upper hatch, 16 …… Reel, 18 …… Rail pulling unit, A …… Working room, B ... Slab ceiling, C ...
…Aperture.

Claims (1)

[Claims] 1. A pneumatic caisson equipped with an excavator 1 movably traveling along a rail installed on a slab ceiling B of a work room A, wherein the rail is directly below a fixed rail 5'and a recovery lock 13. Of the excavator 1 which is installed in the opening C of the excavator 1 and which is connected to the fixed rail 5 ′ and includes a detachable rail 5 which is freely contactable and separable. Is substantially vertical to the ground, and the pulling device 6 simultaneously pulls up the separating rail 5 and the excavator 1 into the collection lock 13, closes the lower hatch 14, decompresses the inside of the collection lock 13, and closes the upper hatch 15 A method for recovering a pneumatic caisson excavator, characterized by opening the valve and recovering at atmospheric pressure.