JPH0547784Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a rotary excavation device for excavating the ground, and more specifically relates to improvements in excavation efficiency, etc.

<<Prior Art>> A conventional rotary excavation device of this type is shown in FIG. That is, as shown in the figure, there is a muddy water suction port 2 located approximately at the center of the lower end of the device body 1.
A rotating drum 3 is attached to both sides of the lower end of the main body 1 of the apparatus. and,
A large number of excavating blades 4 are arranged on the surface of the rotating drum 3, and by rotating the rotating drum 3 in a predetermined direction (arrow direction in the figure), the excavating blades 4 are
excavates the ground, scoops up the excavated earth, sand, and rocks upward, and discharges the earth and sand together with muddy water to the ground through the muddy water suction port 2 located above.

Then, a digging blade 4 attached to the rotating drum 3
Specifically, it is as shown in FIG.
That is, a support plate 5 is formed upright on the surface of the rotating drum 3, and the excavation blade 4 is attached to the tip of the support plate 5. And the support plate 5 is
It is disposed so as to be perpendicular to the surface of the rotating drum 3 and facing in the same direction as the rotating direction of the rotating drum 3. Furthermore, the wall thickness is uniform throughout.

<Problems to be solved by the invention> However, the above-described conventional rotary drilling equipment has the following problems.

That is, the earth, sand and rocks excavated by the excavation blade 4 are mixed with muddy water in their original size and sucked into the muddy water suction port 2, but at this time, the excavated earth, sand and rocks are divided into relatively large chunks. If this remains, the lumps will come into contact with the support plate 5 and be repulsed (they will not be broken into pieces), resulting in a problem in which the efficiency of excavation and suction of muddy water (containing excavated earth and sand) will be reduced.

This invention was made in view of the above-mentioned problems, and the purpose is to provide a rotary excavation device that can improve excavation efficiency and discharge efficiency of excavated earth and sand.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the rotary excavation device according to the present invention includes a rotary drum disposed below the device main body, and a support plate attached to the surface of the rotary drum. In a rotary excavation device having an attached excavation blade, a blade portion was formed at the front portion of the support plate.

<Function> As the rotary drum rotates, the excavation blade cuts into rocks,
Excavate earth and sand. At this time, even if the rock or the like excavated by the cutting blade is a relatively large lump, the cutting blade formed at the tip of the support plate breaks it into small pieces.

As a result, the excavated rock etc. becomes finer, so that the discharge work can be carried out smoothly.

<Embodiments> Hereinafter, preferred embodiments of the rotary excavation device according to the present invention will be described with reference to the accompanying drawings.

The basic structure of the rotary excavation device of the present invention is almost the same as that of the conventional device, so only its features will be explained.As shown in FIG. The support plate 12 is integrally formed upright, and the holder 1 is attached to the tip of the support plate 12.
An excavation blade 16 is attached via 4.

Next, each part will be described in detail. The front end of the support plate 16 in the advancing direction is sharply pointed to form a blade part 18. This blade portion 18 performs secondary excavation of the rock etc. excavated by the excavation blade 16 to crush it into finer pieces.

Further, in this embodiment, the thickness of the support plate 12 gradually increases toward the rear, and is formed into a substantially wedge-shaped plane. Further, as shown in FIG. 3, the rear of the support plate 12 is curved toward the suction port in order to facilitate guiding excavated earth and sand to the muddy water suction port 20.

Next, the operation of the above embodiment will be explained. Each rotary drum 10 is driven to rotate in a predetermined direction. Then, the excavating blade 16 provided on the rotating drum 10 excavates the earth and sand. Next, the earth and sand excavated by the excavation blade 16 is crushed again by the blade part 18 provided on the support plate 12.

As a result, even if earth, sand, and rocks are excavated in relatively large chunks, the blade portion 18 can reliably crush them into finer pieces.
Mud water can be sucked smoothly into the suction port.

In addition, in this embodiment, since the support plate 12 is curved toward the muddy water suction port, excavated rocks, earth and sand are smoothly sucked in along the curved side surface in the direction of the guided broken line arrow, and are carried to the outside. It becomes expelled.

<Effects of the invention> As described above, since the rotary excavation device according to the invention has the blade portion formed in front of the support plate, even if the earth, sand or rock excavated by the excavation blade is a large lump, the rotary excavation device according to the invention The blade can reliably and finely crush the product.

As a result, the finely crushed earth, sand and rocks can be sucked in and discharged to the outside together with the muddy water, thereby improving the excavation efficiency and the efficiency of sucking in the excavated earth.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view of the main parts of a rotary excavation device according to the present invention, FIG. 2 is a cross-sectional view taken along the - line in FIG.
FIG. 3 is an enlarged perspective view of the main part, and FIGS. 4 and 5 are diagrams showing a conventional example. 10... Rotating drum, 12... Support plate, 16...
...Drilling blade, 18...Blade part.

Claims (1)

[Scope of utility model registration request] In a rotary excavation device that has a rotating drum disposed below the device body and an excavation blade attached to the surface of the rotary drum via a support plate, the blade portion is formed in the front part of the support plate. Features: Rotary excavation equipment.