JPH0545634Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is for use in new-machine caissons, which carry out earth and sand from internal working chambers when constructing underground concrete structures using the new-machine caisson construction method. Regarding earth and sand transport equipment.

(Prior Art) A new caisson construction method has been known as one of the methods for constructing underground concrete structures.

In this construction method, work such as excavating and transporting earth and sand is carried out in an environment of high pressure. For example, as shown in Fig. 4, a pressurized air work chamber 3 is created using the slab 2 of the caisson body 1, which has a roughly H-shaped cross section. Separate this work room 3
The earth and sand excavated by the operator or the excavation mechanism 4 is transported to the outside by a bucket 7 via a cylinder 5 and an aerodynamic chamber 8 provided approximately at the center of the slab 2.

That is, an airlock chamber 8 is formed in the upper part of the cylinder 5 communicating with the pressurized air working chamber 3, and the inside of the said pressurized air working chamber 3 is always maintained at a high pressure state by the action of this airlock chamber 8. Excavation will be carried out while checking the ground. The airlock chamber 8 has two upper and lower hatches 9 and 10, respectively.
The soil excavated in the work room 3 is loaded into a bucket 7 suspended by a wire 6, and is opened through a double-opening upper hatch 9 and lower hatch 10 as shown in Fig. 5. By alternately opening and closing, the air in the pressurized air work chamber 3 is prevented from leaking. Further, a wire through hole 11 for suspending the bucket bag 7 is provided in the center of the upper hatch 9, and the periphery of this through hole 11 is protected in an airtight state with rubber or the like.

Incidentally, as a conventional technique for such a hatch, a technique described in Japanese Utility Model Application Publication No. 1983-76840 filed by the present applicant has been proposed.

In the above, conventionally, two buckets 7a and 7b are used to make the earth and sand removal work more efficient.
While one bucket 7a is discharging soil through the cylinder 5 and the airlock chamber 8, the other bucket 7a
When the empty bucket 7a descends, the worker replaces it with the other bucket 7b.

(Problem to be solved by the invention) However, in order to save labor and make unmanned construction possible in this type of neutral caisson construction method, the work of replacing the buckets 7a and 7b by workers becomes complicated and complicated. Therefore, there were problems such as an increase in the number of man-hours and an obstacle to automating the work.

This invention was made to solve this problem, and the main purpose is to provide an earth and sand removal device for a pneumatic caisson that can automate and unmanned the earth and sand removal work. It is in.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an air chamber 8 which can be communicated with and shut off from the outside air through a hatch.
a cylinder 5 connected to the aerodynamic chamber 8; a pressurized air work chamber 3 formed in the lower part of the cylinder 5 and communicated with the cylinder 5; In a neutral caisson equipped with an earth and sand transport device for transporting earth and sand in a working chamber to the outside, the aerodynamic chamber 8 is equipped with an upper hatch 9 having two holes whose periphery is protected by a sealing material, and the earth and sand transport device is consists of a hydraulic clam shell bucket 17, which has a hydraulically driven shovel portion 17a and a hydraulic actuating portion 12, and a take-up reel on which a power supply cable 15 is wound. 14, and the shovel portion 17a is controlled to open and close by the hydraulic actuating portion 12, thereby making it possible to grasp and excavate earth and sand.

(Function) With the above configuration, according to the present invention, the airlock chamber 8 has upper and lower hatches 9 and 1 that can communicate with and shut off the outside air.
0, when the bucket 17 is lowered, the upper hatch 9 is first opened to put the bucket 17 into the airlock chamber 8, and then the upper hatch 9 is closed to change the pressure in the airlock chamber 8 to the pressure in the pneumatic working chamber 3. After equalization, the lower hatch 10 is closed, and while the pressure inside the cylinder 5 is kept constant, the bucket 17 can descend inside the cylinder 5 and enter the pressurized air working chamber 3.

At this time, connect the power supply cable to the upper hatch 9.
Since the cable 15 below the cable 15 is restrained and fixed to the cable 15 and extended from the take-up reel, there is no risk of damage to the cable 15 due to wear.

When the bucket reaches the pneumatic work chamber 3, the hydraulic actuator is controlled to open the bucket 17 and grab the excavated earth and sand with the shovel part 17a. At this time, since the shovel portion 17a is driven to open and close by hydraulic pressure, its driving force is strong and it is possible to perform excavation work if necessary. Therefore, it is suitable for labor saving and unmanned construction in the new caisson construction method.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described

FIG. 1 shows the overall configuration when carrying out earth and sand from inside a pneumatic caisson using the device of the present invention. In addition, the above-mentioned figures 4 and 5
Components that are the same as or correspond to those in the drawings are designated by the same reference numerals or the same reference numerals plus 10, and detailed description thereof will be omitted.

In the present invention, an air chamber 8 that can be communicated with and shut off from the outside air through a hatch, a cylinder 5 connected to the air chamber 8, and a pressurized air chamber formed in the lower part of the cylinder 5 and communicated with the cylinder 5 are provided. Work room 3
Also, there is provided an earth and sand transport device which is movable up and down inside the air chamber 8 and the cylinder 5 and transports the earth and sand in the pressurized air working chamber 3 to the outside.

That is, there is an upper hatch 9 inside the caisson body 1.
Air tank chamber 8 that can be communicated with and shut off from the outside air via
and the airlock chamber 8 via the lower hatch 10.
A cylinder 5 is provided which communicates with the cylinder 5, and a pressurized air work chamber 3 which communicates with the cylinder 5 is provided at the bottom of the cylinder 5.
is formed. The upper hatch 9 consists of a disk-shaped double door, and is of a type that can maintain an airtight state when closed. In addition, the lower hatch 10
consists of a disk-shaped single or double door.
Further, the aerodynamic chamber 8 is provided with an air supply hole (not shown) for increasing the pressure inside the chamber. The inside of the pressurized air work chamber 3 is always kept in a high pressure state, and the earth and sand excavated by the excavation mechanism 4 etc. while checking the ground is transported to the outside by a bucket 17 provided in the air chamber 8 and the cylinder 5 so as to be able to move up and down. will be carried out.

Here, the characteristic feature of the present invention is that the aerodynamic chamber is equipped with an upper hatch 9 having two holes, and the earth and sand removal device is composed of a bucket 17 of a hydraulic clam-shell bucket, and this hydraulic clam-shell bucket is configured to carry earth and sand. It has a shovel section 17a for scooping dirt and a hydraulic actuating section 12, and the hydraulic actuating section 12 controls the shovel section 17a to open and close freely, thereby making it possible to grab and excavate earth and sand.

In this embodiment, the bucket 17 is a hydraulic clam shell bucket. Further, the hydraulic operating section 12 is composed of an electric motor, a hydraulic pump, and a hydraulic cylinder.
A wire support fitting 13 and a take-up reel 14 are provided on the upper part of the wire support member 2 . A wire 6 for suspending the bucket 17 so that it can be raised and lowered is attached to the wire indicator fitting 13, and a cable 15 for supplying power to the electric motor is wound around the take-up reel 14. In order to maintain an airtight state when these wires 6 and cables 15 communicate with the hatch 9, the hatch 9 is equipped with a wire whose periphery is protected with a sealing material such as rubber, as shown in FIG. Through hole 1
1 and a cable passage hole 16 are provided.

When the electric motor is driven by electric power supplied from the cable 15 and the hydraulic cylinder is operated via the hydraulic pump, the shovel portion 17a is opened and closed.
This allows the soil to be grabbed. In addition,
Since the shovel portion 17a is hydraulically driven, its power is strong and can also serve as the excavation mechanism 4.

A rail 18 is fixed above the caisson body 1, and a carrier 19 supporting the bucket 17 moves along this rail 18, and the earth and sand are discharged to the earth and sand hopper 20.

The operation of the apparatus of this embodiment having the above configuration will be explained.

As shown in FIG. 3, when the bucket 17 descends from the position above the airlock chamber 8, the upper hatch 9 is opened and the bucket 17 enters the airlock chamber 8. At this time, aerodynamic chamber 8
The lower hatch 10 of is closed. Subsequently, the upper hatch 9 is closed to supply air into the airlock chamber 8, and the pressure within the airlock chamber 8 is set to the same value as the pressure within the pneumatic working chamber 3.

Next, when the lower hatch 10 is opened and the wire 6 suspending the bucket 17 is loosened, the wire 6 passes through the wire passage hole 11 of the upper hatch 9, and the bucket 17 is lowered by its own weight. At this time, the cable 15 is inserted into the cable passage hole 16 of the upper hatch 9.
As the bucket belt 17 descends, the take-up reel 14 rotates to supply the cable 15 of the required length.

In this way, the bucket 1 entered the pressurized air work chamber 3.
7 grabs the dirt accumulated almost directly below the cylinder 5 and is pulled up into the aerodynamic chamber 8 again. Subsequently, the lower hatch 10 is closed, the air in the airlock chamber 8 is removed to bring the pressure inside the airlock chamber 8 to atmospheric pressure, and then the upper hatch 5 is opened and the cable 15 is released from the cable passage hole 16. After pulling the bucket 17 further upward, the bucket 17 is moved together with the carrier 19 to above the earth and sand hopper 20 along the rail 18, and the shovel portion 17a is opened to discharge the soil.

(Effects of the Invention) As explained above, the present invention includes an aerodynamic chamber 8 that can be communicated with and shut off from the outside air via a hatch, a cylinder 5 connected to the aerodynamic chamber 8, and a cylinder 5 connected to the aerodynamic chamber 8.
a pneumatic working chamber 3 formed in the lower part of the cylinder 5 and communicating with the cylinder 5;
In the pneumatic caisson, the air chamber 8 is equipped with an earth and sand transport device that is movable up and down inside and that transports the earth and sand in the air work chamber 3 to the outside.
is equipped with an upper hatch 9 having two holes, and
The earth and sand transporting device consists of a hydraulic clam shell bucket 17, which has a shovel portion 17a and a hydraulic actuating portion 12, and a take-up reel 14 on which a power supply cable 15 is wound. By controlling the shovel part 17a to open and close freely by the hydraulic actuating part 12, it is possible to grasp and excavate the earth and sand. (1) The hydraulically operated bucket 17 can directly grasp the earth and sand. The excavation mechanism 4 in the pressurized air work chamber 3 only needs to collect the excavated earth and sand.

In addition, a hydraulic operating section 12 is provided on the top of the bucket 17.
The additional weight increases gripping capacity and reduces loading time.

Furthermore, since the shovel portion 17a is hydraulically driven, its power is cooperative, and the excavation mechanism 4
It also plays the role of

(2) Since there is no need for workers to replace the bucket 17, it is easy to automate and unmanned the system.

(3) The power supply cable 15 is connected to the upper hatch 9
The cable 15 is restrained and fixed in the cable passage hole 16, and the cable 15 below it is stretched by the take-up reel 14, so that damage to the cable 15 due to wear is prevented.

(4) Since the bucket 17 is suspended by one wire 6, the lifting speed of the bucket 17 can be controlled at high speed. Further, the cable 15 serves to prevent the bucket 17 from rotating.

(5) Two through holes 11 passing through the upper hatch 9,
16 is formed by sealing the periphery with rubber or the like, so there is little air leakage.

(6) By using the earth and sand transport device of this embodiment together with a remote control system, it is possible to improve the efficiency of caisson sinking.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional front view of the earth and sand transport device for a pneumatic caisson according to the present invention, Fig. 2 is a plan view of the upper hatch, Fig. 3 is a sectional side view of Fig. 1, and Fig. 4
The figure is a schematic sectional front view of a conventional earth and sand transport device for a pneumatic caisson, and FIG. 5 is a plan view of its upper hatch. 1... Caisson body, 3... Pressure work chamber, 5...
...Cylinder, 7, 17...Bucket, 8...Aerial chamber, 9...Upper hatch, 10...Lower hatch,
12... Hydraulic operating section.

Claims (1)

[Claims for Utility Model Registration] An aerodynamic chamber 8 that can be communicated with and shut off from the outside air via a hatch, a cylinder 5 connected to the aerodynamic chamber 8, and a cylinder 5 formed at the lower part of the cylinder 5.
In the pneumatic caisson, the pneumatic caisson is equipped with a pneumatic working chamber 3 communicating with the pneumatic working chamber 3, and an earth and sand transporting device which is provided in the aerodynamic chamber 8 and the cylinder 5 so as to be able to move up and down and transports the earth and sand in the pneumatic working chamber 3 to the outside. The chamber 8 is equipped with an upper hatch 9 having two holes whose periphery is protected by a sealing material, and the earth and sand removal device consists of a bucket 17 of a hydraulic clam-shell bucket, which is driven by hydraulic pressure. Shovel part 17a
A take-up reel 14 has a hydraulic actuating part 12 and a power supply cable 15 wound around the upper part, and the hydraulic actuating part 12 controls the shovel part 17a to open and close freely, thereby making it possible to grab and excavate earth and sand. An earth and sand transport device for a pneumatic caisson, which is characterized by: