JPH03115620A - Excavator of ground inside caisson - Google Patents

Abstract

PURPOSE:To move an excavator in the radial and circumferential directions by setting a ring rail on the lower part of the inwall of a caisson body, providing an excavator carriage provided with an excavator carriage on a travel body free to move and devising its both edge parts free to move to the ring rail. CONSTITUTION:A ring rail 3 is set on the lower part of the inwall 2 of a caisson body 1 and both edge parts of a linear travel frame 4 travelling in the radial direction on this rail 3 are supported free to slide. Subsequently, an excavator carriage 5 is provided free to move along the travel frame 4 and an excavator 6 is set on the excavator carriage 5. Then, the travel frame 4 is rotated once along the ring rail 3 and the excavator 6 is moved around the inwall 2 of the caisson body 1. Consequently, it is possible to excavate the ground inside the caisson annularly with the excavator 6 and move the position to excavate in the radial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for excavating the internal ground of a caisson.

[Prior art 1] As shown in Japanese Patent Publication No. 60-22132, a circumferentially extending rail is provided on the inner wall of the lower part of the caisson frame, and a packet-type excavator is movably provided along the rail to carry out excavation. A device that sequentially excavates the ground inside a caisson using a machine.

A device that excavates the internal ground of a caisson using a clamshell from the ground surface.

etc. are known.

[Problem to be solved by the invention]

In the former case, the excavator booms.

It is a packet type consisting of an arm and a packet, and the base of the boom moves along the rail installed on the inner wall of the lower part of the caisson frame, so when the diameter of the caisson becomes large, the ground in the center of the caisson cannot be excavated unless the boom and arm are lengthened. .

For this reason, the weight of the excavator increases, and the strength of the support part of the excavator must be increased, which increases the cost.

The latter type of excavation equipment cannot excavate the ground corresponding to the caisson blade opening, and cannot excavate hard ground due to its low excavation force.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an excavation device for excavating the ground inside a caisson, which can solve the above-mentioned problems.

[Means and effects for solving the problem] An annular rail is attached to the lower part of the inner wall of the caisson frame, both ends of a traveling body facing in the radial direction are supported on this annular rail so as to be freely movable, and an excavator truck is mounted on this traveling body. The excavator is movable, and an excavator is installed on the excavator truck, so that the excavator can be moved in the radial direction and circumferential direction of the caisson.

〔Example〕

As shown in FIGS. 1 and 2, the inner wall 2 of the caisson frame 1
An annular rail 3 is attached to the lower part, and both ends of a linear traveling frame 4 facing in the radial direction are slidably supported on the annular rail 3, and an excavator truck 5 is provided movably along the traveling frame 4. , an excavator 6 is attached to the excavator cart 5.

The annular rail 3 is connected to an upper rail 7 as shown in FIG.
and a lower rail 8 are attached to the inner wall 2 of the caisson frame 1 with fasteners 9, and upper guide rollers 10 are provided on the running frame 4 on the vertical guide surface 7a and upper surface 7b of the upper rail 7.
, drive wheel 1] are in contact with the vertical guide surface 3a of the lower rail 8.

Lower guide roller provided on the traveling frame 4 on the lower surface 8b]
2. The support ring 13 is in contact.

The lower guide roller 12 and the support wheel 13 are connected to the bracket 1
4, and the bracket 14 is supported by a pin 16 on the support piece 15 of the lower traveling body 4 so as to be able to swing up and down, and when the bracket 14 is placed in a downward position as shown by the imaginary line in FIG. 3, the lower guide roller 12, the support 13 is the lower rail 8
This allows the traveling frame 4 to be lifted upward by being detached from the frame.

Incidentally, an upper rail 20 and a lower rail 21 are attached to the side surface of the traveling body 4 in the longitudinal direction as shown in FIG.
The drive wheel 25 is in contact with the vertical guide surface 20a1 upper surface 20b of the upper rail 20, and two lower guide rollers and a support wheel 30 are provided on a bracket 28 that is provided on the support bracket 26 of the excavator truck 5 so as to be swingable up and down with a bin 27. , its lower guide roller 29 and support wheel 30 are connected to the vertical guide surface 2 of the lower rail 21.
1a1 in contact with the lower surface 21b, the bracket 28 is swung downward, and the lower guide roller 29 and the support wheel 30 are attached to the lower rail 2.
The excavator truck 5 may be lifted by separating from the excavator truck 1.

Since the excavator 6 can be moved around the inner wall 2 of the caisson frame 1 by rotating the traveling body 4 once along the annular rail 3, the excavator 6 can excavate the internal ground of the caisson in a ring shape. Furthermore, by moving the excavator cart 5 along the traveling body 4, the position where excavation can be performed can be moved in the radial direction.

Therefore, even if the diameter of the caisson increases, the ground can be excavated inside the caisson without increasing the size of the excavator 6.

In FIG. 1, the excavator truck 5 is equipped with a topography measuring device 17 such as an ultrasonic sensor or a television camera, so as to be able to detect the condition of the excavation surface.

As shown in FIGS. 5 and 6, the excavator 6 is supported by the support arm 3.
A pair of packets 31. ．． The support arm 30 may be attached to the excavator truck 5 by a cylinder 32 and an arm 33 so as to be swingable up and down.

〔Effect of the invention〕

By moving the traveling body 4 along the annular rail 3, the excavator 6 can be moved in the circumferential direction of the caisson, and by moving the excavator cart 5 along the traveling body 4, the excavator 6 can be moved in the radial direction of the caisson. Can be moved.

Therefore, even if the diameter of the caisson becomes large, the internal ground of the caisson can be excavated to the center without increasing the size of the excavator 6.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, with FIG. 1 being a longitudinal sectional view and FIG.
The figure is a plan view, Figure 3 is an explanatory diagram of the annular rail part, Figure 4 is an explanatory diagram of the guide part of the excavator truck, Figure 5 is a vertical cross-sectional view showing a modification of the excavator, and Figure 6 is the bucket part. In the front view, 1 is the caisson frame, 2 is the inner wall, 3 is the annular rail, 4 is the running body, 5 is the excavator truck, and 6 is the excavator. Figure 1

Claims (1)

[Claims] Attach the annular rail 3 to the lower part of the inner wall 2 of the caisson frame 1,
Both ends of a traveling body 4 facing in the radial direction are supported on the annular rail 3 so as to be freely movable, an excavator truck 5 is movably provided on the traveling body 4, and an excavator 6 is installed on the excavator truck 5. Excavation equipment for the ground inside the caisson.