JPH01182497A - Method and device for forcing caisson bucket to fall down - Google Patents

Abstract

PURPOSE:To reduce a time required for discharging earth and sand so as to attempt power saving and reduction of a cycle time by engaging the engage member of a caisson bucket with the receiving member of an earth and sand receiving hopper so as to force the caisson bucket to fall down automatically. CONSTITUTION:A caisson bucket 20 is lifted up by winding its wire until a engaging member 34 comprising a metallic disc attached to the bottom of the caisson bucket 20 via a connecting member 32 such as chains, reaches a position slightly below a metallic disc receiver 36 acting as a receiving member in a pi-character shape and attached to an earth and sand hopper 30 by means of a gate-type crane via a wire rope 22. And the gate-type crane is moved horizontally so as to move the caisson bucket horizontally and after the engaging member 34 is engaged with the receiver 36, the wire rope 22 is released downward from its winding so that both the caisson bucket 20 and its connecting member 32 are swung around the engagement position 44 to be inclined and forced to fall down so that the earth and sand may be discharged through an opening 46 into the earth and sand hopper 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to so-called sludge removal equipment at a caisson construction site, or equipment for charging earth and sand excavated within a caisson into an earth and sand receiving hopper.

[Prior Art] FIG. 4 shows the structure of a construction site using a pressurized caisson known as a "pneumatic caisson."

This caisson has a frame 3 having a concrete frame side wall 1 and a working chamber ceiling 2, and a cutting edge 4 is provided around the lower part of the working chamber ceiling 2. The space surrounded by the work room ceiling 2 and the cutting edge becomes the work room 5, and inside the work room 5, workers IM, M... are engaged in excavation work.The work room ceiling 2 is penetrated by workers. They are a room air supply pipe 6 and a blow pipe 7. The inside of the frame 3 is filled with water IW as a load.

A work room ceiling hanging girder 8 and a special shaft 9 are connected to the work room ceiling 2. This special shaft 9
has a hollow structure, and the caisson bucket 10 passes through the inside thereof. An airlock 11 is provided above the special shaft 9. An air supply pipe 12 and an exhaust pipe 13 are connected to the airlock 11, and the air supply pipe 12 extends from an air conditioning chamber (not shown). A landing 14 is provided around the airlock 11, and the work tool M-
1M- is working.

Note that GL indicates the ground surface, WL indicates the underground water level, and 15 indicates a climbing ladder provided inside the special shaft 9.

In the prior art as shown in FIG. 4, when the excavated earth and sand are discharged, the earth and sand excavated by the working tool M (submersible boxer) in the working chamber 5 of the caisson is transported to the caisson bucket 10.
contained within. Caisson bucket 10 containing earth and sand
is a heavy machine (not shown) installed outside the caisson, such as a crawler crane or a tripod derrick.
It is suspended by a wire row 116 lowered through the special shaft 9, and is hoisted out of the caisson by a winch (not shown).

After hoisting the caisson outside, hang the rope for overturning the packet at the bottom of the caisson bucket 10.
The caisson bucket 10 is moved above the earth and sand receiving hopper (not shown in Fig. 4) by moving the Lower the caisson bucket until it can be reached. When the packet overturning rope is pulled, the caisson bucket 10 rotates, and the earth and sand contained therein are thrown into the earth and sand receiving hopper. Here, when the site is narrow or there are two or more sets of aerodynamics, a skater or a mole rail is used instead of heavy machinery to dump the earth and sand stored in the caisson bucket into the earth and sand receiving hopper.

However, the caisson bucket 10 is a special shirt I-
Since it passes through the inside of the caisson bucket 9, no protrusions or the like can be formed on the side surface of the caisson bucket 10. Further, since the stability of the caisson bucket 10 is deteriorated, it is not possible to form a protrusion on the bottom of the bucket. Therefore, it is not possible to attach an overturning lobe or the like to the caisson bucket 10 in advance, or to suspend it inside the caisson to accommodate earth and sand. Therefore, each time the caisson bucket is rolled up outside the caisson, the rope for overturning the packet must be hooked onto the caisson bucket. The overturning rope must be removed from the caisson bucket each time the caisson bucket is suspended inside the caisson after soil has been introduced.

Furthermore, after moving the caisson bucket above the earth and sand receiving hopper, it is necessary to pull the rope for overturning the packet in order to dump the earth and sand stored inside the caisson bucket.

For the above-mentioned reasons, in the prior art, it took a long time to discharge the earth and sand excavated within the caisson, and the labor required for this work was large.

[Object of the Invention] The present invention was created in view of the problems of the prior art described above, and provides a method for overturning a caisson bucket that can shorten the earth and sand discharge time, thereby saving labor and shortening the cycle time. and a caisson bucket overturning device.

[Structure of the Invention] A method for overturning a caisson bucket according to the present invention is a method for overturning a caisson bucket containing earth and sand in order to charge earth and sand excavated in the caisson into an earth and sand receiving hopper.
A process of lifting the caisson bucket containing earth and sand above the caisson, a process of horizontally moving the caisson bucket, and a process of moving the engaging member attached to the bottom of the caisson bucket via the connection W5 material to the receiving member attached to the earth and sand receiving hopper. The method includes a step of engaging, and a step of lowering the caisson bucket and rotating the caisson bucket about the engagement member. .

Further, the caisson bucket overturning device of the present invention is a caisson bucket overturning device that overturns a caisson bucket containing earth and sand in order to charge earth and sand excavated in the caisson into an earth and sand receiving hopper. , comprising a means for horizontally moving the caisson bucket, an engaging member attached to the bottom of the caisson bucket via a connecting member, and a receiving member attached to the slanted earth and sand receiving hopper for receiving the engaging member. .

[Operations and Effects of the Invention] According to the present invention, the engaging member is attached to the bottom of the caisson bucket by the connecting member.

Therefore, when the caisson bucket communicates within the special shaft of the caisson, the inner wall of the special shaft and the caisson bucket engaging member do not interfere, and the caisson bucket passes smoothly. Moreover, since the connecting member can be constructed of a chain or string, the stability of the caisson bucket is not impaired when the caisson bucket lands inside the caisson.

Based on the function and effect of the hat, the present invention eliminates the need for attaching or detaching the packet overturning rope to the caisson bucket, and also eliminates the need for pulling the packet overturning rope for dumping earth and sand. As a result, the work of putting earth and sand in (so-called work of removing dirt) can be omitted.

Further, according to the present invention, the earth and sand contained in the caisson bucket is inevitably thrown into the earth and sand receiving hopper by the movement and overturning (rotation) of the caisson bucket, so the cycle time of the sloughing operation is reduced. . In addition to this, according to the present invention, it is possible to completely automate the shear removal work.

[Preferred Embodiment] As described above, it is preferable to use a member such as a chain or string as the connecting member that bends or curves appropriately when the engaging member lands on the ground.

Further, when carrying out the present invention, it is preferable to install a dedicated gantry crane as a means for hoisting up or lowering the caisson bucket and moving it horizontally.

Furthermore, it is preferable to raise the bottom of the caisson bucket so that the connecting member and the engaging member can be accommodated in the raised bottom, in order to improve the sitting position of the caisson bucket.

The engaging member is preferably a metal disc, and the receiving member is preferably configured in a roughly π-shape, and the receiving member is installed at an appropriate distance from the input port of the earth and sand receiving hopper. Preferably, the connection member and the caisson bucket are configured to rotate about the metal disk so that the earth and sand in the caisson bucket can be thrown into the earth and sand receiving hopper.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 20 indicates a caisson bucket;
This caisson bucket 20 is a cylindrical packet made of steel, and its upper part is reinforced with a cylindrical iron plate. The caisson bucket 20 is suspended from a gantry crane 24 by wire rows 122.

A moving member 26.26 is provided at the bottom of the gantry crane 24, and is adapted to move the gantry crane 24 horizontally as shown by arrow A. Note that the aerodynamic tank 28 is located below the caisson bucket 20.
The earth and sand receiving hopper 30 is located on the left side of the caisson bucket 20.

The bottom of the caisson bucket 20 is provided with an engaging member, i.e., gold plate, through a connecting member, i.e., chain 32. yv disc 3
4 is installed. This engaging member 34 is adapted to be received in a π-shaped (see FIG. 3) receiving member, that is, a metal disk receiver 36 attached to the earth and sand receiving hopper 30.

2 and 3 show the caisson bucket 20 and the earth and sand receiving hopper 30 in detail. A bucket pin 38 is formed at the upper edge of the caisson bucket 20 and is connected to a string 40 .
is connected to the wire row 122 via the clevis bin 42.

The procedure for charging the earth and sand contained in the caisson bucket 20 into the earth and sand receiving hopper 30 is as follows.

First, the caisson bucket 20 is moved from below the airlock 28 by the portal crane 24 to the engaging member 34 and the receiving member 36.
Next, the portal crane 24 is horizontally moved to the left in FIG. 1 by the moving member 26, so that the caisson The bucket 20 is also moved horizontally. Second
The engaging member 34 engages with the receiving member 36 at a position immediately in front of ffI in the middle of the figure. Then, when the wire row 122 is unwound, the caisson bucket 20 and the connecting member 32 reach the engagement value i, as shown by the middle boxes (■ and ■) in FIG. ! It rotates around 44. When the caisson bucket 20 tilts to a certain extent, earth and sand are discharged downward from the opening 46.

In order to return the caisson bucket 20 to below the air lock 28 after discharging the earth and sand, the procedure described above can be performed in reverse. That is, first, the wire rope 22 is wound up and the caisson bucket 20 is moved around the engagement point 44. ■ in Figure 2
Then, the gate type crane 24 is moved horizontally to the right in FIG.

At this time, the engaging member 34 is pulled out from the receiving member 36 by moving the caisson bucket 20 to the right.

As shown in FIG. 1, by lowering the wire row 122, the caisson bucket 20 is returned to below the airlock 28.

[summary] The effects of the present invention explained above are listed below.

(1) Even if an engaging member for overturning (rotation) is attached to the caisson bucket, there is no problem with excavation work inside the caisson and movement inside the special shaft below the aerodynamics.

(2) By attaching the receiving member to the earth and sand receiving hopper and horizontally moving the caisson bucket, the engaging member is hooked (engaged), so operation is reliable.

(3) When the receiving member is hooked and the wire lobe of the portal crane is lowered, the caisson bucket is reversed (rotated) and the earth and sand are automatically discharged, reducing the labor required for discharge work.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the arrangement of various members in an embodiment of the present invention, Fig. 2 is a front view showing details of the caisson bucket and the sand receiving hopper, and Fig. 3 is a plan view of the caisson bucket and the sand receiving hopper. , FIG. 4 is a sectional front view for explaining the caisson construction site. 20...Caisson 22...Wire row 1 24
... Gate type crane 28 ... Aerotsuku 30
... Sediment receiving hopper 32 ... Connection member 34.
...Engagement member 36...Receiving member Fig. 1 Fig. 2 Fig. 3

Claims (2)

[Claims] (1) In the method of overturning the caisson bucket containing the earth and sand in order to dump the earth and sand excavated inside the caisson into the earth and sand receiving hopper, the caisson bucket containing the earth and sand is lifted up to the upper part of the caisson, and the caisson bucket is moved horizontally. a step of engaging an engaging member attached to the bottom of the caisson bucket via a connecting member with a receiving member attached to the earth and sand receiving hopper; and lowering the caisson bucket to lower the caisson bucket around the engaging member. and rotating a caisson bucket. (2) In a caisson bucket overturning device that overturns a caisson bucket containing earth and sand in order to dump earth and sand excavated within the caisson into an earth and sand receiving hopper, a means for raising and lowering the caisson bucket and a means for horizontally moving the caisson bucket A caisson bucket overturning device comprising: an engaging member attached to the bottom of the caisson bucket via a connecting member; and a receiving member attached to a dirt receiving hopper for receiving the engaging member.