JPH061634Y2 - Sediment unloader for pneumatic caisson - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is to carry out sediment from a pneumatic caisson for carrying out sediment from an internal work room when constructing a concrete structure in the ground by the pneumatic caisson method. Regarding the device.

(Prior Art) Conventionally, a pneumatic caisson method has been known as one of methods for constructing a concrete structure in the ground.

This method is used to excavate and carry out earth and sand under an environment of high pressure, and for example, as shown in FIG.
The slab 2 of the caisson body 1 having a shape divides a pneumatic working chamber 3 into which a worker or an excavation mechanism 4 is
The earth and sand excavated by is carried out to the outside by the bucket 7 via the cylinder 5 and the air lock chamber 8 provided in the substantially center of the slab 2.

That is, the air lock chamber 8 is formed in the upper part of the cylinder 5 which communicates with the pressure working chamber 3, and the inside of the pressure working chamber 3 is always maintained in a high pressure state by the action of the air lock chamber 8. Excavation is performed while checking the ground inside. The air lock chamber 8 is provided with two doors, an upper hatch 9 and a lower hatch 10, on the top and bottom, and the earth and sand excavated in the working chamber 3 is loaded into a bucket 7 suspended by a wire 6, By alternately opening and closing the double-opening type upper hatch 9 and lower hatch 10 as shown in FIG. 4, the air in the pneumatic working chamber 3 is prevented from leaking. In addition, a wire through hole 11 for suspending the bucket 7 is provided in the center of the upper hatch 9, and rubber around the through hole 11 is protected in an airtight state.

As a conventional technique for such a hatch, a technique described in Japanese Utility Model Laid-Open No. 61-76840, which is an application of the applicant of the present application, has been proposed.

In the above, conventionally, in order to efficiently carry out the work of carrying out earth and sand, two buckets 7a and 7b are used, and while one bucket 7a is discharging soil through the cylinder 5 and the airlock chamber 8, the other The bucket 7b was loaded with earth and sand, and when the empty bucket 7a descended, the worker replaced it with the other bucket 7b.

(Problems to be solved by the invention) However, labor saving in this type of pneumatic caisson method is unmanned, and replacement work by the operators of the buckets 7a, 7b is complicated, for example, it is complicated. There were problems such as an increase in man-hours for work and obstacles to automation of work.

This invention was made to solve such problems,
It is an object of the invention to provide a sediment carrying-out device for a pneumatic caisson, which is capable of mainly automating and carrying out unmanned work of carrying out sediment.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an airlock chamber capable of communicating with and blocking outside air through a hatch, a cylinder connected to the airlock chamber, and a cylinder connected to the airlock chamber. In a pneumatic caisson equipped with a pneumatic working chamber formed in the lower part of the air communicating with the air communication, and a sediment carrying-out device for carrying out the sand in the pneumatic working chamber to the outside, which is provided up and down in the air lock chamber and the cylinder. The sediment carrying-out device is composed of a hydraulic clamshell bucket, and the hydraulic clamshell bucket has a moving door placed on the upper part thereof, and a holding means is arranged in the air lock chamber, and the holding means is provided by the holding means when the bucket descends. By sandwiching and fixing the door to separate the moving door and the bucket, a hatch is formed by this moving door, and the moving door is mounted again when the bucket rises. According to the present invention, the air lock chamber has the upper and lower hatches capable of communicating with and blocking the outside air, and the bucket lowering is performed. Sometimes open the upper hatch first to put the bucket in the airlock chamber, then close the upper hatch to make the pressure in the airlock chamber equal to the pressure in the pneumatic working chamber and then close the lower hatch to keep the pressure in the cylinder constant. While held, the bucket can descend in the cylinder and enter the pneumatic working chamber.

In the present invention, the bucket is composed of a hydraulic clamshell bucket, a moving door is placed on the upper portion thereof, and the upper hatch is formed by the moving door. That is, when the bucket on which the moving door is placed descends and is positioned in the airlock chamber, the moving door is pinched and fixed by the holding means arranged in the airlock chamber to separate the moving door and the bucket. Thus, an upper hatch is formed by the moving door left in the airlock chamber, while the bucket descends toward the pneumatic working chamber.

When the bucket reaches the work room, the hydraulically operated unit is controlled to open the bucket, and the excavated soil is grabbed by the shovel. At this time, since the shovel portion is hydraulically opened and closed, the driving force is large, and excavation work can be performed if necessary.

Next, when the bucket is raised, the moving door forming an upper hatch in the airlock chamber is placed again on the bucket, the moving door and the bucket are connected, and the bucket is further moved up toward the earth and sand hopper.

As described above, labor saving and unmanned operation in the pneumatic caisson method can be achieved.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the overall structure when the earth and sand are carried out from the pneumatic caisson by the device of the present invention.
The same or corresponding members as those in FIGS. 3 and 4 described above are designated by the same reference numerals, and detailed description thereof will be omitted.

First, according to the present invention, an airlock chamber capable of communicating with and blocking outside air via a hatch, a cylinder connected to the airlock chamber, and a pressure working chamber formed below the cylinder and communicating with the cylinder. The air lock chamber and the cylinder are provided so as to be able to move up and down, and the earth and sand unloading device for unloading the earth and sand in the pressure working chamber to the outside is provided.

That is, in the caisson body 1, as will be described later, an air lock chamber 8 capable of communicating with and blocking outside air via a moving door 22 corresponding to an upper hatch, and a lower hatch 10 communicating with the air lock chamber 8 are provided. A cylinder 5 is provided, and a compressed air working chamber 3 communicating with the cylinder 8 is formed below the cylinder 8. The lower hatch 10 comprises a disc-shaped single-opening door or double-opening door. In addition, the air lock chamber 8
Although not shown in the figure, an air supply hole for increasing the pressure inside the room is provided. The inside of the pneumatic working chamber 3 is always maintained in a high pressure state, and the earth and sand excavated by the excavation mechanism 4 and the like while checking the ground is moved by the bucket 17 that is vertically movable in the air lock chamber 8 and the cylinder 5. It is carried out to the outside.

Here, the characteristic feature of the present invention is that the sediment carrying-out device is composed of a hydraulic clamshell bucket, and the hydraulic clamshell bucket has a moving door mounted on the upper part thereof, and a holding means is arranged in the airlock chamber. That is what is being done.

In the present embodiment, the bucket 17 is a hydraulic clamshell bucket and is provided with a shovel portion 17a for scooping earth and sand and a hydraulic operating portion 12. The hydraulic operating unit 12 is composed of an electric motor, a hydraulic pump, and a hydraulic cylinder. The hydraulic operating unit 12 is attached with a wire 6 for suspending the bucket 17 so that the bucket 17 can be moved up and down, and a stopper 21. The moving door 22 is placed under its own weight. This stopper 21
The moving door 22 and the moving door 22 are integrally fixed, and a take-up reel 14 is provided inside the stopper 21, and a hydraulic operating unit is provided via a cable 15 wound around the take-up reel 14.
Power is supplied to 12 electric motors.

As shown in FIG. 2, the movable door 22 has a disc shape, and has a wire passage hole 11 and a cable passage hole near the center thereof.
16 and are provided.

The air lock chamber 8 is provided with a hydraulic jack 23 as a holding means at its upper part. When the bucket 17 descends together with the moving door from above and detects the moving door 22, the hydraulic jack 23 operates. The movable door 22 is sandwiched and fixed from the surroundings. The fixed moving door 22 forms an airtight door corresponding to the above-mentioned upper hatch, and the bucket 17 is separated from the moving door 22 so that only the bucket 17 descends.

In this bucket 17, when the hydraulic cylinder is operated via the hydraulic pump, the shovel portion 17a is opened and closed, and thereby the soil is grabbed. Since the shovel part 17a is hydraulically driven ,. The power is cooperation and can also serve as the excavation mechanism 4.

A rail 18 is fixed above the caisson body 1, a carrier 19 supporting the bucket 17 moves along the rail 18, and the earth and sand is discharged to the earth and sand hopper 20. The bucket 17 can also be lifted by a crane or the like.

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

When the bucket 17 on which the moving door 22 is placed descends from a state of being located above the airlock chamber 8, the moving door 22 is clamped and fixed by the hydraulic jack 23, and only the bucket 17 passes through the airlock chamber 8. At this time, the lower hatch 10 of the airlock chamber 8 is closed. Subsequently, air is fed into the airlock chamber 8 and the pressure inside the airlock chamber 8 is set to the same value as the pressure inside the pneumatic working chamber 3.

Next, when the lower hatch 10 is opened to loosen the wire 6 that suspends the bucket 17, the yair 6 is moved to the wire through hole of the moving door 22.
After passing 11, the bucket 17 descends due to its own weight. At this time, the cable 15 is fixed in a state of being constrained by the cable passage hole 16 of the moving door 22, and the winding reel 14 rotates as the bucket 17 descends to supply the cable 15 of the required length.

The bucket 17 that has entered the air pressure working chamber 3 grabs the earth and sand accumulated just below the cylinder 5 and is pulled up again into the airlock chamber 8. Then, when Hackett 17 is rising,
For example, when it is detected that the bucket 17 comes into contact with the stopper 21 fixed to the lower portion of the moving door 22, the hydraulic jack 23 operates so as to release the moving door 22, and thereafter, the moving door 22 moves to the upper portion of the bucket 17. It is placed again and rises with the bucket 17. Then, after pulling the bucket 17 further upward,
The bucket 17 along with the rail 18 along with the carrier 19
The shovel portion 17a is moved to a position above 20 and the soil is discharged.

As described above, according to the present embodiment, since the moving door 22 functions as a hatch and the take-up reel 14 of the cable 15 is fixed to the moving door side and does not descend, for example, water overflows into the pneumatic working chamber 3. Even if there is a problem, the take-up reel 14 itself does not get wet, so there is no risk of electrical leakage, etc.

(Effects of the Invention) As described above, the present invention provides an air lock chamber that can communicate with and block outside air via a hatch, a cylinder connected to the air lock chamber, and a cylinder formed below the cylinder. In a pneumatic caisson equipped with a pneumatic working chamber that communicates with the air lock chamber, and a sediment transporting device that is configured to move up and down in the air lock chamber and to discharge the soil in the pneumatic working chamber to the outside, the sediment transporting device is a hydraulic clam. This hydraulic clamshell bucket has a moving door placed on the upper part thereof, and a holding means is arranged in the airlock chamber, and when the bucket is lowered, the moving door is held and fixed by the holding means. By separating the door from the bucket, a hatch is formed by this moving door, and when the bucket rises, the moving door is placed again to connect the moving door and the bucket. By doing so, it is possible to automate the carry-out of the sand and the like in the pneumatic caisson to shorten the working time, and thus to unmanned the work.

[Brief description of drawings]

FIG. 1 is a schematic sectional front view of a sediment carrying-out device for a pneumatic caisson according to the present invention, FIG. 2 is a plan view of a moving door, and FIG.
FIG. 4 is a schematic sectional front view of a conventional sediment carrying-out device for pneumatic caisson, and FIG. 4 is a plan view of an upper hatch. 1 ... Caisson body 3 ... Pneumatic working chamber 5 ... Cylinder 7,17 ... Bucket 8 ... Airlock chamber 10 ... Lower hatch 12 ... Hydraulic actuating part 22 ... Moving Door 23 ... hydraulic jack.

Claims (1)

[Scope of utility model registration request] 1. An airlock chamber capable of communicating with and blocking outside air via a hatch, a cylinder connected to the airlock chamber, and a compressed air working chamber formed under the cylinder and communicating with the cylinder. In a pneumatic caisson equipped with a sediment carrying device for carrying out the sand in the air working chamber to the inside of the airlock chamber and being able to move up and down, the sediment carrying device comprises a hydraulic clamshell bucket, and the hydraulic clamshell The bucket has a moving door placed on the upper part thereof, and a holding means is arranged in the airlock chamber, and when the bucket is lowered, the moving door is held and fixed by the holding means to separate the moving door and the bucket. A hatch is formed by this moving door, and when the bucket rises, the moving door is placed again to connect the moving door and the bucket. Sediment unloading device for pneumatic caisson.