JP2591285B2 - Inspection equipment for tunnel excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Field of Industrial Application >> The present invention relates to a tip inspection device for a tunnel excavator such as a tunnel boring machine or a shield machine.

<< Conventional Technology >> A tunnel boring machine has been conventionally known as a tunnel excavator used for constructing a tunnel in a relatively autonomous ground.

FIG. 4 shows an example of this type of tunnel boring machine.

The tunnel boring machine shown in FIG. 1 includes a hollow cylindrical main body 1 having both ends opened, and a substantially hemispherical cutter plate 2 disposed at a distal end opening of the main body 1.
A plurality of roller cutters 3 rotatably supported on the cutter plate 2 are arranged, and openings 4 for taking in excavated earth and sand are provided between the roller cutters 3.

A disk-shaped partition wall 6 is provided on the back side of the cutter plate 2 with a sealing material 5 interposed between the cutter plate 2 and the inner peripheral surface thereof.
A chamber 7 for storing excavated earth and sand is defined behind the cutter plate 2.

Outside the inner peripheral edge of the cutter plate 2, a rotary drive motor 8 coupled to the cutter plate 2 via a gear is provided.

A jet nozzle 9 to which high-pressure water is supplied from a device provided behind the main body 1 is provided at a lower portion of the chamber 7. Are provided to pass through.

In the boring machine configured as described above, the ground is excavated by the roller cutter 3 by rotating the cutter plate 2 by the rotary drive motor 8 while pressing the main body 1 forward with a propulsion jack (not shown).

The excavated earth and sand is taken into the chamber 7 through the opening 4 and mixed with water jetted from the jet nozzle 9 to form a slurry.
It is carried out outside via 10.

By continuing the above operation, a predetermined tunnel will be constructed in the tunnel boring machine having such a configuration. However, as described above, this type of tunnel excavator excavates relatively hard ground. The roller cutter 3 wears relatively early,
In order to maintain drilling efficiency, it is necessary to know the degree of wear.

In addition, the properties of the ground to be excavated have been investigated in advance, but detailed conditions are not fully understood, so it is necessary to visually observe the conditions of the ground and excavated soil as the excavation progresses .

Therefore, conventionally, a worker enters the chamber 7 and inspects the wear state of the roller cutter 3 and the nature of the ground.
Such means have the problems described below.

<< Problems to be Solved by the Invention >> That is, in the above-mentioned inspection means, since the worker enters the chamber 7, the excavation operation has to be interrupted, so that there is a problem that the excavation efficiency is reduced.

Also, in this type of tunnel boring machine, since the chamber 7 is not pressurized unlike a shield excavator, it is easier to insert a worker inside than a shield excavator. Sediment was contained, and workers could not be accommodated without removing it, making it difficult to remove excavated soil in a narrow cabin.

The present invention has been made in view of such conventional problems, and an object of the present invention is to observe the wear of the cutter and the properties of the ground without interrupting excavation work or removing excavated earth and sand. It is an object of the present invention to provide a tip inspection device for a tunnel excavator that can be used.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention has a cutter plate which is disposed at the tip of an excavator body, has a plurality of cutters and openings, and is driven to rotate. In a tunnel excavator in which a partition wall is provided on the back side of a cutter plate, a slide pipe that is rotatable through the partition wall and is slidably mounted in the front-rear direction and slidably movable at a tip end of the slide pipe. , A swing mechanism for the arm, an image sensor supported at the tip of the arm, and an image display device connected to the image sensor via the arm and the slide tube. It is characterized by.

<< Operation >> According to the tip inspection device of the tunnel excavator having the above configuration,
The image sensor supported on the tip of the arm faces the cutter and the opening of the cutter plate by appropriately combining the forward and backward movement and the rotational movement of the slide tube with the swing of the arm, and these conditions are displayed on an image display device. Can be projected to

Embodiment Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a first embodiment of a tip inspection device for a tunnel excavator according to the present invention.

The inspection apparatus shown in the figure applies the present invention to the tunnel boring machine shown in FIG. 4, and the configuration of the boring machine itself is the same as this type of conventional machine.

The inspection device 20 is mounted when performing inspection on a mounting flange 22 fixed around a hole formed at an appropriate position of the partition wall 6, and the mounting flange 22 is disposed at an appropriate distance from the center, for example. A plurality of concentric circles are provided in advance.

When the inspection is not performed, the mounting flange 22 is closed with a blind lid.

The inspection device 20 is a guide tube that is tightened to the mounting flange 22.
24, a slide tube 26 inserted into the guide tube 24, and an arm 28 that is swingably disposed at the tip of the slide tube 26,
It comprises a swing mechanism 30 of the arm 28, an image sensor 32 supported at the tip of the arm 28, and an image display device 34 connected to the image sensor 32.

The slide tube 26 has a hollow cylindrical shape with both ends opened, and is movably mounted in the front and rear direction via the bearing 36 on the guide tube 24, and is rotatably mounted.
An operation handle 38 is attached to the rear side.

The image sensor 32 is a small camera using a solid-state image pickup tube (CCD), a fiber scope (endoscope) using an optical fiber, an optical rigid mirror, or the like. And arm 28
And is connected to the image display device.

 FIG. 2 shows the details of the swing mechanism 30.

The oscillating mechanism 30 shown in FIG. 1 includes a pulse motor 40 installed at the tip of a slide tube 26, a bevel gear 42 fixed to a rotation shaft of the pulse motor 40, and a driven bevel gear meshing with the bevel gear 42. A gear 44 and a small diameter spur gear 46 are provided coaxially,
Intermediate shaft 48 rotatably supported on the inner surface of slide tube 26
And a large-diameter spur gear 50 meshing with the small-diameter spur gear 46, a swing shaft 52 rotatably supported on the inner surface of the slide tube 26, the rear end of the arm 28 being fixed.

The device denoted by reference numeral 54 shown in FIG.
Of the drive controller.

The inspection device 20 configured as described above includes the slide tube 26
The image sensor 32 supported on the tip of the arm 28 is positioned near the roller cutter 3 of the cutter plate 2 by appropriately combining the forward and backward movement and the rotational movement of the arm 28 with the swing of the arm 28 driven by the pulse motor 40. The wear state of the roller cutter 3 and the state of the ground can be displayed on the image display device 34 by displacing or facing the opening 4.

At this time, the display portion of the image sensor 32 can be operated while being monitored by the image display device 34.

The inspection of the tip portion of the tunnel boring machine as described above is performed without an operator entering the chamber 7 and without stopping the excavation work or removing the excavated earth and sand in the chamber 7.

FIG. 3 shows another embodiment of the swing mechanism of the arm 28. This swing mechanism 30a is provided with a bearing 26a at the distal end of a slide tube 26, and a swing shaft is attached to the bearing 26a.
The rear end of the arm 28 is pivotally supported by a swing shaft 56.

The swing shaft 56 has a pair of link arms with the arm 28 interposed therebetween.
One end of 58 is fixed, and the other end of the link arm 58 is connected to a telescopic plunger 62 of a jack 60 pivotally supported on the distal end side of the slide tube 26.

When the jack 60 is also driven by the swing mechanism 30a configured as described above, as shown by a broken line in FIG.
Since the 28 is swung, the tip of the boring machine can be inspected similarly to the first embodiment.

In the above embodiment, the case where the present invention is applied to a tunnel boring machine is exemplified. However, the present invention is not limited to this type of excavator, and may be, for example, an earth pressure type or a shield type such as a muddy water type. It also applies to excavators, where the chamber is pressurized in such types of shielded excavators, for example, if compressed air is introduced into the chamber prior to inspection to form a partial cavity By the same operation as in the above embodiment, it is possible to observe the degree of wear of the cutter at the tip and the nature of the ground.

<< Effects of the Invention >> As described above in detail in the embodiments, according to the tip inspection apparatus of the present invention, without stopping the excavation work of the excavator, the wear condition of the cutter and the properties of the ground are observed and inspected. As a result, a decrease in excavation efficiency is avoided.

[Brief description of the drawings]

FIG. 1 is an overall view of an inspection apparatus for a tunnel excavator according to the present invention, FIG. 2 is a detailed view of a swing mechanism of the same, and FIG. 3 is a detailed view showing another example of a swing mechanism of the same apparatus. It is. 20… Inspection device 24… Guide tube 26… Slide tube 28… Arm 30, a… Swing mechanism 32 …… Image sensor 34 …… Image display device

Claims (1)

(57) [Claims] 1. A tunnel excavator provided at a tip of an excavator body, having a plurality of cutters and openings, and having a cutter plate that is driven to rotate, wherein a partition wall is provided on the back side of the cutter plate. Rotatable through the partition wall, and
A slide tube slidably mounted in the front-rear direction, an arm swingably disposed at the tip of the slide tube, a swing mechanism of the arm, and an image sensor supported by the tip of the arm And an image display device connected to the image sensor via the arm and the slide tube.