JPH0410531B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention is applied to a tractor shaft that performs excavation work, ground leveling work, foundation work, etc. in the pneumatic work chamber of the caisson in the pneumatic caisson construction method carried out on foundation ground or on the seabed. Concerning work machines such as bells, tractor jackhammers, bulldozers, etc.

"Prior Art" As is known from Japanese Patent Application Laid-open No. 58-131230, the present applicant has developed a driver's cab for the above-mentioned work equipment so that the operator of the work equipment can operate the work equipment under atmospheric pressure conditions. is installed and fixed on the machine base as a pressure-resistant capsule with an airtight structure, and a lock chamber (air lock) is provided on the upper side of the caisson body so that the operator can enter and leave the pressure-resistant capsule without entering the pressurized work chamber of the caisson. ), a hanging rod is installed so that it can be moved up and down,
This hanging rod is lowered, its lower end is connected to a hanging rod receiver provided outside the pressure capsule, and after it is locked, the hanging rod is raised to lift the pressure capsule together with the machine base. has already provided a pressure capsule in which the hatch in the upper wall of the capsule can be aligned with the lower end opening of the passage in the caisson body.

``Problems that the invention seeks to solve'' However, according to this, there were the following problems.

(1) The entire working machine, including the pressure-resistant capsule, is lifted and lowered by a suspension rod, which requires a large amount of power to move up and down.

(2) The lifting rod on the caisson body and the lifting rod receiver on the working machine side must be aligned, connected, and locked, which takes time and effort to connect and release.

(3) The operation of aligning the hatch of the pressure capsule with the lower end opening of the passage in the caisson body, that is, the operation of raising the entire work equipment, must be performed on the caisson body side, and must be performed by the operator of the work equipment himself. Therefore, the driver cannot escape from the pressure capsule at any time.

An object of the present invention is to provide a pneumatic caisson construction work machine that can solve these problems.

"Means for Solving the Problems" The pressurized caisson construction method working machine of the present invention has a pressure-resistant capsule serving as a driver's cab separated from the machine base, and can be moved up and down with respect to the machine base by the operation of a cylinder device. Only the pressure capsule can be raised by the driver's own operation, and its hatch can be aligned with the lower end opening of the passage in the caisson body.

"Example" An example of the present invention will be described in detail below based on the drawings.

In FIG. 1, a caisson main body 1 is installed on foundation ground (or the seabed) 2 and forms a pressurized air work chamber 4 below a ceiling portion 3. As shown in FIG. A passage 5 is provided in the center of the ceiling 3, a lock chamber (lock) 6 is connected above the passage 5, and a hollow shaft 7 is connected above the lock chamber 6. Further, an annular cap 8 is attached to the inside of the lower end opening of the passage 5. Although not shown, a sealing lid that can be opened and closed is installed between the passage 5 and the lock chamber 6.

On the other hand, the pressurized air caisson construction method work machine (tractor shovel) 9 according to the present invention assembled in the pressurized air work room 4 has a pressure capsule 11 and a power unit 12 mounted on a machine base 10 equipped with a caterpillar, and a shovel unit. I am wearing 13.
The pressure capsule 11 is separated from the machine base 10,
As shown in FIGS. 1 and 2, these pressure-resistant capsules 11 and the machine base 10 are connected to each other by four cylinder devices 14 on the front, rear, left, and right sides. When the cylinder devices 14 are extended and retracted, the pressure-resistant capsule 11 stands on the machine base 10. It vertically moves up and down along the installed guide pillar 15. The inside of the pressure capsule 11 is an airtight exercise chamber, and is communicated with the atmosphere via a hose (not shown). At the center of the upper wall of the pressure capsule 11, a dish-shaped hatch 17 is provided with a sealing lid 16 attached thereto. Further, airtight windows 18 and 19 are provided on the front wall and left and right side walls of the pressure capsule 11, and an emergency exit is formed on the rear wall, and a lid 20 is attached to seal the exit. The four cylinder devices 14 are operated simultaneously or individually by operations within the pressure-resistant capsule 11. Each cylinder device 14 is restricted from outward rotation beyond a predetermined value by a restriction plate 21 .

Therefore, the person exercising in the pressure capsule 11 can always operate the working machine 9, operate the shovel unit 13, and operate the cylinder device 14 under atmospheric pressure conditions. Also, as shown by the chain line in the figure, the pressure capsule 11 is raised and the rim of the hatch 17 is moved to the base 8.
When pressed against the lower surface of the hatch 17, the hatch 17 communicates with the passage 5 in an airtight manner.

The driver gets on and off the work equipment according to the following procedure.

In the case of riding, the pressure capsule 11 is raised as shown in FIG. The airtight lid is opened to expose the inside of the passage 5 to the atmosphere. Thereafter, the driver opens the airtight lid 16, enters the pressure capsule 11 as shown in FIG. 1B, and closes the airtight lid 16. Next, aisle 5
After closing the upper airtight lid to block the passage 5 from the lock chamber 6 as shown in Figure C, the pressure resistant capsule 11 is lowered as shown in Figure D.

When getting off the vehicle, the pressure capsule 11 is raised and its hatch 17 is placed in the passage 5 as shown in FIG. 4A.
After aligning the opening at the lower end airtightly, an operator inside the lock chamber 6 opens the sealing lid at the top of the passage 5 to open the passage 5.
The inside is opened to the atmosphere as shown in Figure B. after that,
The driver opens the airtight lid 16 of the hatch 17 and
As shown in FIG. 2, the capsule escapes from the pressure capsule 11 and enters the passage 5.

Therefore, the driver can enter and leave the pressure capsule 11 without being exposed to the high pressure within the pressurized air work chamber 4.

In the above embodiment, the present invention was applied to a tractor shovel, but the present invention can also be applied to other working machines such as a tractor rock drill, bulldozer, etc., and is not limited to ground traveling type working machines. It is clear from the above that the present invention can also be applied to an overhead traveling type working machine that runs along a rail provided on the lower surface of the section 3.

``Effects of the Invention'' As described above, according to the pressure-air caisson construction method working machine of the present invention, the hatch of the pressure-resistant capsule can be moved into the passageway of the caisson body simply by raising the pressure-resistant capsule relative to the machine base by operating the cylinder device. Since it can be aligned with the lower end opening, the power required for lifting and lowering is smaller compared to the conventional method in which the entire work equipment is lifted by lifting it, and the operation can be easily and easily performed by the operator himself. It can be done quickly.

[Brief explanation of drawings]

Fig. 1 is a side view showing the pneumatic caisson construction method work machine according to the present invention together with the caisson body, Fig. 2 is a front view of the work machine, Fig. 3 is an explanatory diagram showing the procedure for getting on the work machine, and Fig. 4 is an explanatory diagram showing the procedure for getting on the work machine. It is an explanatory diagram showing a procedure to do. 11...Pressure capsule, 10...Machine base, 14...
... Cylinder device, 1 ... Caisson body, 5 ... Passage, 17 ... Hatch, 16 ... Sealing lid.

Claims (1)

[Claims] 1. A pressure capsule with an airtight cabin inside is connected to the machine base via a sealing device so that it can be moved up and down on the machine base, and the pressure capsule is attached to the upper wall of the pressure capsule on the cylinder. A pressurized air caisson construction working machine, characterized in that it is provided with a hatch that can be brought into airtight communication with the lower end opening of the passage of the caisson body when lifted by a device, and a sealing lid is attached to the hatch. .