JPS6228277B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavator, such as a tunnel excavator, equipped with advanced boring equipment.

Generally, when excavating a tunnel, the face is first bored a predetermined forward distance using an advanced boring machine in order to investigate the soil quality, water flow, etc., and then the excavator is operated to excavate the face.

Therefore, conventionally, as shown in Figure 1, the tunnel 1
An excavator 2 and an advanced boring machine 3 are prepared inside the machine, and during boring, the excavator 2 on the face 4 side is stopped, and the bearing stands 6, 6 of the boring rod 5 are attached to this machine, and the boring machine on the rear side is installed. While the boring rod 5 from 3 is rotatably supported, the face 4 is bored with a drill 7 of the rod 5.

Or, when tunnel 1 is not that long,
After the excavator 2 is retreated to the pit entrance, the boring machine 3 is moved to the vicinity of the face 4 and boring is performed. In this way, once the boring has been completed, the boring machine 3 is retreated to the wellhead or waiting area, and the rear waste carrier is brought into the pit behind the excavator 2 in its place. Perform excavation.

Excavation is carried out by repeating these operations, but it is difficult to improve work efficiency due to the movement of the boring machine 3, and when boring as shown in the figure, the boring rod 5
The overall length of the excavator 2 becomes longer, the setup including installation and removal during boring is time consuming, and there are problems such as the boring location is limited in relation to the cross section of the face.Additionally, the method of replacing the excavator 2 also reduces work efficiency. In particular, the smaller the excavation cross section, the more difficult the work becomes.

SUMMARY OF THE INVENTION In order to solve this problem, an object of the present invention is to provide an excavator that simplifies advanced boring work by attaching a boring device to the cutter boom of the excavator.

Embodiments of the present invention will be described below based on the drawings.

Figures 2 and 3 show the entire device.
0 indicates a rail-type excavator main body, and a boom portion 14 is supported by a bracket 12 attached to a swivel base 11 at the front end thereof so as to be freely movable up and down.

The cutter 13 is rotatably supported by a boom section 14, and excavates the face and scrapes excavated earth and sand through the screw section 15.

Reference numeral 17 denotes a bucket section disposed below the boom section 14, which collects earth and sand from the excavator toward a belt conveyor 19 using rotary blades 18, 18, . . . .

The conveyor 19 is attached to the excavator main body 10,
The earth and sand are sent to the rear transport vehicle.

20 is a vertical jack for moving the boom portion 14 up and down, and 21 is a jack for rotating the swivel base 11 left and right.

In addition, 23 is a moving rail part provided on the lower surface of the excavator main body 10, and the main body 10 is moved through wheels 24, 24.
While the excavator body 10 is seated, the excavator main body 10 can move forward by operating the moving cylinder 25.

During excavation, the excavator main body 10 is engaged with the moving rail section 23 by the lever 27 via the clamp cylinder 26.

After advancing the predetermined stroke, the excavator main body 10 is supported by a vertical jack (not shown).
The moving rail portion 23 is pulled forward by the moving cylinder 25.

However, although these are rail type cases, a self-propelled type with crawlers attached to the lower surface of the excavator main body 10 may also be used.

A boring device 30 is removably attached to the side surface of the cutter boom section 14 so as not to interfere with the cutter 13 and the screw section 15.

As shown in detail in FIGS. 4 and 5, the boring device 30 includes a support base 32 that is rotatable with respect to a clamp bracket 31 that is attached to the boom section 14.
A main body frame 33 is fixed to the main body frame 33, and a spindle 34 is arranged to be able to freely slide on the main body frame 33.

The spindle 34 is rotationally driven via a hydraulic motor 35 and a reduction gear (not shown) inside a gear case 36, and is axially driven via a swivel head 40 connected to a rod portion 39 of the feeding cylinders 38, 38. Moving.

A hydraulic chuck 4 is attached to the end of the swivel head 40.
The hydraulic chuck 41 is connected to the end of a spindle 34 that freely rotates through the center of the swivel head 40, and chucks a boring rod 43 that is inserted through the hollow interior of the spindle 34. do.

During boring, the boring rod 43 is added one after another and sent forward.

With the above configuration, when performing advanced boring first during excavation, the cutter boom 14 is set in a predetermined boring direction (face side), and then the drill is attached to the tip of the boring device 30. Install the boring rod 43. Then, when the feeding cylinder 38 is contracted from the most extended state while driving the hydraulic motor 35, the boring rod 43 is fed in the axial direction while rotating.

This allows boring against the face,
When the feed cylinder 38 is advanced by a predetermined stroke (the effective stroke of the feed cylinder 38), the hydraulic motor 35 is stopped and the hydraulic chuck 41 is released to extend the feed cylinder 38. After this, chucking is performed again and the boring rod 43 is pushed forward by one stroke in the same manner as above.

When the drilling stroke reaches the unit length of the boring rod 43, a new rod 43 is added and the same operation is repeated to perform the prescribed boring in this way. By reversing the operation, the boring rod 4
3 is pulled out from the face and the advanced boring is completed.

Note that since the spindle 34 moves forward while rotating, in order to impart the rotational force of the hydraulic motor 35,
It is necessary to link the rotary part with a known spline, key mechanism, etc.

After the boring work is completed, the excavation of the face is started using the cutter 13 of the excavator main body 10. At this time, if the cross section of the face is small and hinders the work, the boring equipment 30 is removed from the boom section 14 and removed from the rear. Store in.

Of course, when the cross section of the face is sufficiently large and there is no problem with the work, excavation is performed with the boring device 30 fixed to the boom section 14.

In this way, according to the present invention, boring and excavation can be performed alternately and almost continuously, and the excavation efficiency can be greatly improved.

The boring device itself can set the boring direction arbitrarily by using the movement of the boom, so there is no need for special means for this, and at the same time, the boring reaction force is also received by the excavator itself, which together make the boring device more compact. It is possible to reduce the size and weight, reduce costs, and easily attach it to the boom section.

In addition, when excavating, a small hole is sometimes made in the face using a rock drill, but this is done to increase the efficiency of drilling hard rock or to use dynamite. be. In contrast, in the present invention, by extending the boring rod, advanced boring to a depth of several tens of meters can be performed in parallel with excavation, so soil quality and water vein surveys can be sufficiently conducted prior to excavation. Therefore, efficient excavation work can be performed.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional device, FIG. 2 is an overall side view of the present invention, FIG. 3 is a plan view, FIG. 4 is a side view of the boring device, and FIG. 5 is a front view. 10...excavator body, 13...katsuta, 14...
...Boom part, 17...Bucket part, 19...Conveyor, 30...Boring device, 31...Clamp bracket, 33...Main frame, 34...Spindle, 35...Hydraulic motor, 38...Feeding cylinder , 41...hydraulic chuck, 43...boring rod.

Claims (1)

[Claims] 1. A cutter boom section is provided in front of the excavator main body, a main body frame is attached to the side surface of the cutter boom section via a bracket, a spindle is provided on this main body frame to freely rotate and slide in the axial direction, and a rotational driving force is applied to this spindle. A feeding cylinder is attached to the main body frame and equipped with a hydraulic motor that transmits a hydraulic motor and drives this spindle in the axial direction via a swivel head. An excavator characterized in that a swivel head is provided with free relative rotation.