JPH01165831A - Excavator for pneumatic caisson - Google Patents

Abstract

PURPOSE:To permit unmanned excavating operation in a pneumatic caisson by a method in which a case with an air conditioner having a dehumidifying action is attached to the machine body and an electronic device is housed in the case to keep good working environment. CONSTITUTION:A case 5b with an air conditioner 5c having at least a dehumidifying action is attached to the machine body 5, and an electronic device 5d constituting the electronic circuits of various devices in an excavator 1 for pneumatic caisson is housed in the case 5b. The electronic devices 5d can be well kept to exhibit better functions without causing condensation.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an excavator for a pneumatic caisson that can contribute to unmanned excavation work inside a pneumatic caisson.

(b), Prior Art Conventionally, excavation work using an excavator inside a pneumatic caisson has been performed by a worker riding on the excavator.

(C) 0 Problems to be Solved by the Invention However, working inside a pressurized caisson is hard labor, and there is a strong desire for unmanned operation of excavators. In order to unmanned the operation of an excavator, electronic equipment such as various sensors and control equipment to control them is required.
Generally, the humidity is extremely high (if such electronic equipment is stored in an idle machine under normal conditions, there is a risk that condensation will occur immediately and malfunction will occur. There was a desire to develop an excavator for pneumatic caissons.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a pressurized caisson excavator that can store electronic equipment in a good condition even under pressure and in a humid atmosphere.

(d) Means for solving the zero problem, that is, the present invention provides an electronic device for the fuselage (5)! (5d), and the housing (5b) is provided with an air conditioning device (5c) having at least a dehumidifying effect.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. r under a [e]
The same applies to the column ``, action''.

(e) Zero effect With the above-described configuration, the present invention acts so that the housing (5b) in which the electronic device (5d) is stored is maintained in a low humidity state by the air conditioning device (5c).

(f), Example Hereinafter, embodiments of the present invention will be described based on Drawing 1ζ.

FIG. 1 is a front view showing an embodiment of a pneumatic caisson excavator according to the present invention, and FIG. 2 is a plan view of FIG. 1.

As shown in FIGS. 1 and 2, the pressure air caisson 2 has a pressure chamber 2a that is pressurized above atmospheric pressure.
A first rail (not shown) is installed on the ceiling 2b of the pressure chamber 2a.
It is provided in the left-right direction in the figure, that is, in the direction of arrows A and B in FIG. A pneumatic caisson excavator 1 is mounted on the rail so as to be movable and driven in the directions of arrows A and B, and the pneumatic caisson excavator 1 has a frame 3 suspended from the rail. A rotating frame 5 is supported on the frame 3 so as to be rotatably driven in the direction of the arrow CSD in FIG. A first boom 7 is mounted on the rotating frame 5 in the direction of arrows E and F, with the hydraulic actuator 1 centered on the center CT1.
1, and a second boom 9 is provided on the first boom 7 so as to be extendable and retractable in directions of arrows G and H with respect to the first boom 7. A packet 10 is provided at the tip of the second boom 9 so as to be rotatable in the directions of arrows {circle around (2)} and J through a bin 10a. Further, the frame 3 includes a mileage sensor 12, which is connected to the rotating frame 5, the first boom 7, and the second boom.
The boom 9 is provided with rotation angle sensors 13, 15, 16, and the first boom 7 is further provided with a telescopic distance sensor 17 at its tip.

On the other hand, a housing 2b is provided on the left side of the rotating frame 5 in FIGS. 1 and 2, and an electronic device 5d is provided in the housing 5b.
is installed. The housing 5b is also provided with an air conditioning device 5C such as a dehumidifier or cooler for removing moisture from the air inside the housing 5b. Maintained in humid conditions.

Since the pressurized caisson excavator 1 etc. has the above configuration, when excavating the ground 23 in the pressurized air chamber 2a, the frame 3 is moved in the directions of arrows A and B along the rail, and the rotating frame 5 is with arrow C centered on axis CT
,,Turn the second boom 9 in the direction of D, and then move the second boom 9 in the direction of arrows G and H.
The packet 10 is positioned on the ground 23 at a position to be excavated from now on by protruding and retreating in the direction. Next, the first boom 7 is rotated in the directions of arrows E and F around the center CTI by the hydraulic actuator 11, and the packet 1
0 is turned around the pin 10a in the direction of the arrow 11J, and the ground 23 is excavated with the packet 10. All of these operations are performed by remote control from outside the pressure chamber 2a, but in that case, it is difficult to know where in the pressure chamber 2a the machine 1 for cutting the caisson is currently working, and in what posture. If it is not possible to recognize this, it will be impossible for Party B to perform proper operations.

Therefore, the mileage sensor 12, the rotation angle sensor 13.1
5.16 and the telescopic distance sensor 17, the position and attitude of the pneumatic caisson excavator 1 in the pneumatic chamber 2a are detected. That is, the mileage sensor 12 is attached to the frame 3, and detects the distance L1 that the frame 3 has moved on the rail from the origin ZP. In addition, the rotation angle sensor 131
The rotation angle A3 of the rotating frame 5 with respect to the frame 3 is detected. Further, the rotation angle sensor 15 detects the rotation angle A1 of the first boom 7 with respect to the rotation frame 5, the rotation angle sensor 16 detects the rotation angle A2 of the packet 10 with respect to the second boom 9, and the telescopic distance sensor 17 detects the rotation angle A2 of the packet 10 with respect to the second boom 9. The extension/contraction distance glIL2 of the second boom 9 with respect to the first boom 7 in the directions of arrows G and H is detected. Thus, each sensor 12.13
．． 15, 16, and 17 detect each moving scene,
A circuit that processes the signals detected from each sensor,
An electronic device 5d equipped with an electronic circuit for driving each sensor is housed in a housing 5b. Since the inside of the housing 5b is maintained in a low humidity state by air conditioning and the device 5C, the internal electronic equipment 5d is maintained in good condition without condensation, despite the high humidity state in the pressure chamber 2a. Ru.

In addition, although the above-mentioned embodiment describes the case where this excavator is used for excavating inside a pneumatic caisson, this excavator is not limited to excavating inside a pneumatic caisson, but can also be used for excavating in a normal caisson and other normal Of course, it can also be used for general excavation work.

(g) 0 Effects of the Invention As described above, according to the present invention, the body 5b such as the rotating frame 5 is provided with the housing 5b for storing the electronic device 5d,
Since the housing 5b is configured to include at least an air conditioning device 5C having a dehumidifying effect, there is no risk of condensation forming on the electronic device @5d housed inside the housing 5b, thereby realizing a good operating environment for the equipment. Not only will it be possible to do this, but it will also contribute to the realization of unmanned operation of the pneumatic caisson excavator 1.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a pneumatic caisson excavator according to the present invention, and FIG. 2 is a plan view of FIG. 1. 1... Excavator for pressurized caisson 5... Body (rotating frame) 5b... Housing 5C... Air conditioning device 5d... Applicant of electronic equipment Mitsui Construction Co., Ltd. Agent, Patent Attorney, Phase 1) Shinji (and 2 others), Thief 3-Geki-

Claims (1)

[Claims] Pressurized caissons used in pressurized caissons In excavators for excavators, A case is installed in the fuselage to store electronic equipment, Air that has at least a dehumidifying effect on the housing A pneumatic caisson excavator equipped with an adjustment device.