JPS6344919B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an excavator for tunnels and the like.

Generally, when excavating a tunnel, the face is bored by a predetermined forward distance using an advanced boring machine, and then the excavator is operated to excavate the face. Therefore, the excavator supports a large excavation reaction force. It is required to be able to move freely and to be highly maneuverable. However, in the past, there was no small excavator that could satisfy both of these requirements, and the present invention was proposed to solve these problems.It is an object of the present invention to provide an excavator that is compact, highly maneuverable, and generates little noise. The purpose is to

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

Figures 1 and 2 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 table 11 at the front end of the excavator main body 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 excavated earth and sand toward a belt conveyor 19 with 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 on the moving rail section 23 by operating the moving cylinder 25. The lower surface of the moving rail portion 23 is provided with a protrusion (not shown) necessary to receive the excavation reaction force.

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

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

Note that 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.

The boring rod 43 chucked by the rotating spindle 34 during boring 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, a hydraulic motor (not shown) is driven to rotate the boring rod 43 and feed it in the axial direction.

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. After excavating within the reach of the cutter 13, the excavator main body 10 is moved forward.

In this case, during excavation, the lever 27 is engaged with the movable rail section 23 to loosen the clamp cylinder 26 that secures the excavation reaction force, and the movable cylinder 25 is extended to move the excavator main body along the movable rail section 23. 1
Advance 0.

This movement is carried out smoothly by wheels 24,
After the excavator main body 10 is moved by one stroke in this manner, the lever 27 is again engaged with the moving rail portion 23 by the clamp cylinder 26, and excavation is performed after ensuring the excavation reaction force.

Thereafter, for the next forward movement, the lever 27 is disengaged from the moving rail section 23, and then the excavator body 1 is moved by the vertical jack (not shown).
0 is supported from the moving rail section 23 and the moving cylinder 25 is contracted, the moving rail section 23, which is not very heavy, is pulled forward.

In other words, the reaction force during excavation is based on the frictional force between the movable rail section 23 and the ground surface, but when supporting this reaction force, the weight of the excavator main body 10 also acts, so a sufficient frictional force can be obtained. On the other hand, when moving, the excavator main body 10 and the moving rail section 23
Since they move separately, it is possible to move forward or backward relatively easily.

After moving the moving rail section 23 forward in this manner, the excavator main body 10 is moved forward in the same manner as in the first explanation.
is clamped to the movable rail section 23, and advanced boring or excavation by the cutter boom section 14 is performed.

In this way, according to the present invention, boring and excavation can be carried out alternately and almost continuously, maintaining high excavation efficiency.Furthermore, while the excavator itself is relatively small and highly maneuverable, This has the advantage of ensuring the excavation reaction force. Furthermore, the excavator main body can be moved relatively quietly using rails, wheels, hydraulic cylinders, and the like.

[Brief explanation of drawings]

FIG. 1 is an overall side view of an embodiment of the present invention, FIG.
The figure is a plan view. DESCRIPTION OF SYMBOLS 10... Excavator main body, 13... Cutter, 14... Boom part, 17... Bucket part, 19... Conveyor, 23
...Moving rail portion, 25...Moving cylinder, 26...Clamp cylinder, 30...Boring device, 43...
bowling rod.

Claims (1)

[Claims] 1. The excavator main body having a cutter boom section is placed on a movable rail section via wheels, and the excavator main body is movably connected to this movable rail section via a moving cylinder, and the excavator main body and the movable rail section are connected. An excavator characterized in that a clamp cylinder is interposed between the excavator body so that the excavator body can be engaged with and detached from the movable rail part, and a vertical jack that can support the excavator body from the movable rail part is provided. Machine.